Material Properties

To determine the right material for a specific application, it’s important to start by understanding its intrinsic material properties. How a material behaves under stress, exposure to different temperatures, and how it interacts with other substances will play an important role in determining how a profile will perform over time.

TPE (Thermoplastic Elastomer)

TPE represents a versatile class of materials that blends the elastic properties of rubber with the processing benefits of thermoplastics. TPE profiles are soft to the touch, highly flexible, and capable of returning to their original shape after compression. These qualities are essential in applications requiring a tight, adaptive seal.

Modern TPEs offer improved chemical resistance and UV stability, closing the gap between rubber and plastic materials. Some TPE grades are engineered for higher hardness and dimensional stability, making them suitable for structural applications that previously defaulted to PVC. Additionally, TPE materials are often recyclable and can be reprocessed with minimal material degradation, making them a more sustainable option.

PVC (Polyvinyl Chloride)

PVC is a synthetic thermoplastic polymer widely used across the construction and manufacturing industries. It is characterized by its rigidity and chemical stability, and offers reliable resistance to oils, acids, and other aggressive substances. One of its standout features is its inherent strength, which allows it to retain shape and structure even under mechanical stress. PVC performs well in outdoor conditions thanks to its UV resistance, making it a reliable option for exposed installations.

Furthermore, PVC is a cost-effective solution for high-volume projects, thanks to its availability and well-established production processes. However, its rigidity can become a drawback in dynamic or high-flex applications where elasticity and shape recovery are needed.

Applications

Now that we understand the base properties, the next key factor is application-specific suitability. PVC and TPE are both used in sealing and profile applications, but they excel in different environments and roles depending on mechanical demands, environmental exposure, and assembly methods.

PVC Seals and Profiles

PVC seals and profiles are primarily used in structural roles. Their rigidity makes them ideal for window and door frames, cladding, trunking, and pipe profiles, which are all areas where maintaining dimensional stability over time is critical. In building applications, PVC is commonly extruded into profiles that integrate into larger systems, such as glazing frames or exterior wall systems.

In transportation and heavy equipment manufacturing, PVC is used in semi-structural protective profiles, thanks to its resistance to corrosion and wear. Its long-standing presence in these industries also means PVC profiles are widely available and supported by a large network of tooling and processing expertise.

TPE Seals and Profiles

TPE profiles shine in applications that require frequent movement, thermal cycling, or dynamic sealing. These include automotive door seals, HVAC gaskets, vibration-damping elements, and components in consumer products. Their softness also allows TPE seals to form tight, adaptive contact with surfaces of varying geometries, making them ideal in applications where tolerances are inconsistent or subject to change, such as thermal expansion.

In building applications, TPE profiles are increasingly used in fenestration systems for flexible glazing gaskets and thermal break elements. Their acoustic and impact-absorbing properties also make them valuable in interior finishing systems and modular components. Unlike PVC, TPE can be co-extruded with other materials (like hard plastics), enabling multi-material profiles in a single production run.

Performance Considerations

Beyond physical properties and use cases, other performance metrics such as temperature resistance, sustainability, and lifecycle costs play an important role in material selection. Understanding how PVC and TPE behave under real-world conditions will help clarify which material is actually better suited for a which application.

Temperature Resistance

PVC maintains structural integrity at moderately high temperatures and offers decent resistance to heat deformation. However, it tends to become brittle in the lower temperatures, making it less suitable for applications exposed to sub-zero environments.

TPE, on the other hand, retains flexibility and elasticity in cold conditions and can also be formulated for high-temperature tolerance. Specialized TPE compounds can withstand operating temperatures above 120°C, and fire-retardant versions are available for critical safety applications in transportation, construction, and electrical housing.

Environmental Impact

Environmental performance is an important consideration in materials selection. TPE stands out as a recyclable material that can often be processed using energy-efficient methods, reducing overall environmental impact. In addition, many TPEs are produced without plasticizers, heavy metals, or halogenated compounds, making them safer to handle and dispose of than many other profile materials.

PVC’s environmental profile is more complex. While it is durable and long-lasting, its production and disposal raise concerns due to the use of chlorine and the generation of toxic byproducts like dioxins. Recycling of PVC is possible but limited by additives and cross-contamination risks. For companies focused on sustainability, TPE often represents a forward-looking alternative.

Cost Considerations

PVC’s widespread availability and long production history give it a cost advantage in many applications. It’s often the go-to solution for projects where budget constraints are strict and mechanical performance is not heavily demanding.

TPE, while generally more expensive up front, offers value over time. Its superior performance in dynamic and harsh conditions can reduce maintenance costs, extend service life, and support circular manufacturing through recycling. When total lifecycle costs are considered, including disposal and sustainability goals. TPE may offer better long-term value, especially in high-performance applications.

Should you switch over to TPE?

PVC and TPE are both versatile and reliable materials, each offering clear benefits depending on the intended use: 

• PVC excels in rigid, structural applications where cost efficiency and durability are the primary drivers 
• TPE provides advanced sealing performance, dynamic flexibility, and a more favorable environmental footprint, especially in modern engineered grades that rival the strength and stiffness of traditional plastics

For construction and industrial projects, the decision between PVC and TPE should be made based on application-specific requirements, environmental conditions, sustainability targets, and total lifecycle cost. With today’s advanced TPE compounds, replacing PVC even in traditionally rigid applications is increasingly possible, offering designers and engineers new flexibility in their material choices.

Whether you’re building resilient infrastructure, sealing sensitive machinery, or developing eco-conscious products, understanding the trade-offs between PVC and TPE empowers you to select the right profile material for lasting performance.

Our solutions

Our TPE profiles are widely used in the construction industry due to their insulating abilities, durability, and high quality. Of course, windows and doors are the most apparent components where our profiles can be found, but many things, such as timber frames, are still hidden from the naked eye. You can read more about our customer case with Honkarakenne here.

TPE is a very versatile material, which is why it is also used in heavy industry. The pulp and paper industry requires chemical and tear resistance, which are TPE’s strong suits. We have several ways to make TPE profiles into frames, rings, hoops, and other forms that can be easily fitted into the heavy machinery used in the chemical industry. To learn more about manufacturing frames and rings, read this article.

Furthermore, we have several years of experience manufacturing regular and fireproof seals for the railway and maritime industries. Even though the profiles may look the same, their properties vary depending on the circumstances they will have to endure. One of our most recent transportation industry customer cases comes from the maritime industry, as we helped the largest cruise ship in the world, The Icon of the Seas, set sail on time. Read the full article here.

As we mentioned above, TPE is a more ecological alternative for PVC, but we have taken this even further by developing Bio-TPE profiles. Like regular TPE, Bio-TPE is fully recyclable, non-toxic, and has the same properties as regular TPE. 65% of the fossil raw materials have been replaced with bio-based oils, which makes it a much more ecological option.

Are you looking for a PVC replacement?

You are not alone. Many of our clients are looking for environmentally friendly alternatives for PVC profiles, and we are happy to help. Our experts can assist you in finding the right solution for your industry. Contact our sales team to start your journey towards a more sustainable future!

Artikkeli PVC vs. TPE profiles julkaistiin ensimmäisen kerran V.A.V. Group.

As regulations increase and require environmental data at the project level, our customers need verified product information to complete their calculations. To provide our customers with the right documentation, we at V.A.V. Group turned to Reforest Finland Oy for help.

Sustainability requirements are going through changes

According to Atte Borgenström, CEO of sustainability consultancy Reforest, the change in mindset over the past few years has been dramatic.

“We’ve worked with sustainability reporting and carbon footprint calculations for years – carbon footprint reporting has been the core of our work for a long time. But regulation is tightening fast, and requirements keep growing. As a result, companies now need much broader solutions than before.”

Reforest, founded in 2020 and located in Tampere, Finland, supports companies with sustainability reporting, carbon footprint calculations, EPDs, and other environmental assessments. While interest started off slowly, in recent years the demand has accelerated rapidly.

“The number of inquiries has increased massively. Around 2021, sustainability was still often seen as something close to charity. Today, decision-makers understand that it’s an essential part of doing business.”

A combination of EU regulation and market pressure drives this shift. Larger companies increasingly require verified environmental data from their suppliers, which means smaller and mid-sized manufacturers must also be able to provide credible, standardized information.

What the EPD covers

An EPD is based on a life cycle assessment (LCA) of a product. It usually applies to construction products, where environmental performance plays a key role in project-level calculations.

“An EPD shows the environmental impacts of a product across its entire life cycle – from manufacturing and use to end of life. That includes CO₂ emissions and other greenhouse gases, but also impacts on water and ecosystems,” Borgenström explains.

The result is a detailed document containing a large amount of quantified data. While this may seem complex at first glance, its value becomes clear at the project level.

“A building consists of many different components. By combining EPDs, you can calculate the total carbon footprint and environmental impact of the entire building.”

Because EPDs follow harmonized standards and are third-party verified, the data is consistent and comparable, something that unverified calculations cannot guarantee.

Why this matters to us

One of the key strengths of EPDs is that they are always produced according to the same rules. All assumptions must be justified, and nothing essential can be left out.

Once the calculations are complete, the EPD is reviewed by an accredited verifier, who checks the methodology, data sources, and results before approving publication. Verified EPDs are public documents and can be found in databases such as EPD Hub.

A verified EPD is valid for 5 years, provided the product’s composition does not undergo significant changes. If production methods, materials, or energy sources change during that time, updating the EPD can help reflect improved environmental performance.

This is the first EPD calculation for V.A.V. Group and, as such, a starting point for continuous evaluation and improvement of materials, production, and recycling processes to achieve even better results in the future.     

What if a product has no EPD?

If a product does not have its own EPD, generic emission factors are typically used in building or project calculations. While this allows projects to move forward, the results are often less accurate and frequently less favorable than product-specific data.

“For manufacturers operating in Finland and other regions with energy-efficient production and low-carbon electricity, this can be a missed opportunity,” Borgenström notes.

EPDs make it possible to demonstrate real differences between products, especially when compared to alternatives manufactured under very different environmental conditions.

Ask our team for more details!

Reforest carried out the EPD calculations for V.A.V. Group’s products, supporting the process from life cycle assessment to third-party verification. For broad product portfolios, EPDs can often be created for product groups within defined variation ranges, making them a practical and scalable solution even when individual product variants are numerous.

You can now find EPD verifications for our silicone profiles and our TPE sealing profiles on EPD-Hub or by following the links below!

As sustainability expectations continue to evolve, EPDs offer a stable foundation grounded in data, verified by third parties, and increasingly essential for doing business in construction and industry. We at V.A.V. Group will continue to do our part in providing up-to-date documentation on our materials and products.

Artikkeli V.A.V. Group Shares EPD Verifications julkaistiin ensimmäisen kerran V.A.V. Group.

Why Standards Matter in Sealing Solutions

In regulated industries, it is not enough for a seal to simply perform well in practice. Authorities, manufacturers, and operators require documented compliance with recognized standards. This ensures that the materials, design, and testing methods meet a common benchmark for quality and safety. For customers, working with a supplier that understands these requirements provides peace of mind and reduces risks during inspections, audits, and certifications.

Railway Applications and Relevant Standards

Railway environments subject seals to constant vibration, fluctuating temperatures, and exposure to cleaning chemicals. Profiles must maintain performance over long service lives while supporting passenger safety and comfort.

The most important framework is the EN 45545 series, which specifies fire safety requirements for railway applications. For sealing profiles, this means using materials with proven fire resistance and low smoke and toxicity in case of fire. Compliance with EN 45545 is mandatory for rail vehicles operating in the European Union.

In addition to fire safety, standards such as EN 61373 (shock and vibration testing) influence the design and testing of profiles. Seals must withstand mechanical stresses without losing elasticity or sealing capability. Noise and vibration reduction are also part of railway comfort requirements, so seals are often expected to contribute to a quieter and more stable travel environment.

Marine Applications and Relevant Standards

The marine industry presents its own set of challenges. Saltwater, UV exposure, humidity, and fluctuating temperatures accelerate material wear. Safety is also paramount, especially on passenger vessels or offshore platforms.

Standards such as the IMO Fire Test Procedures Code (FTP Code) define fire safety criteria for marine equipment. Sealing profiles used in doors, windows, and bulkheads must pass flame spread and smoke emission tests. Many ship classification societies, including DNV and Lloyd’s Register, require documented compliance before approving materials for use.

Environmental resistance is another key factor. Marine seals often need certification for resistance to ozone, UV light, and salt spray. By meeting these standards, profiles ensure long-term durability in one of the harshest operational environments.

ISO Standards for Materials and Testing

Alongside sector-specific requirements, a range of ISO standards guide material testing and performance evaluation. For example:

• ISO 37 covers the determination of tensile stress and strain in rubber materials, a key measure of elasticity.
  
• ISO 815 defines how to test compression set, which shows how well a seal retains its shape after being compressed.
  
• ISO 48 describes hardness testing, ensuring that materials meet design specifications.
  

These tests provide reliable data on how seals will perform under real-world conditions. When manufacturers follow ISO testing methods, customers can trust that the results are accurate and comparable across different suppliers.

The Role of Compliance in Design and Procurement

Compliance is not only about passing tests at the end of production. It starts with material selection, continues through extrusion design, and extends to the final installation in the field. By considering standards early in the design phase, companies can avoid costly redesigns and delays. For procurement teams, documented compliance simplifies supplier selection and reduces the risk of non-conformity in later inspections.

Conclusion: Standards as a Foundation for Reliability

In the railway and marine industries, sealing profiles must do more than simply provide a tight fit. They need to perform consistently under harsh conditions and prove compliance with strict EU and ISO standards. Fire safety, mechanical resistance, and environmental durability are all part of the requirements.

Choosing a sealing partner who understands and applies these standards ensures that every profile contributes to the overall safety and efficiency of the system. At V.A.V. Group, we help our customers navigate the complexity of compliance by providing seals that meet industry regulations without compromising on performance. If you need sealing solutions that combine reliability with proven certification, our team is ready to support your next project.

Artikkeli EU and ISO Standards for Sealing Profiles in Railway and Marine Applications julkaistiin ensimmäisen kerran V.A.V. Group.

Why Seal Reliability Matters

When a seal loses its function, the consequences can be serious. Leaks may damage equipment, reduce energy efficiency, or even compromise safety in critical applications such as transportation, marine environments, or heavy machinery. The costs of emergency repairs and unscheduled downtime are usually much higher than investing in high-quality seals and proper maintenance from the start.

Common Causes of Seal Failure

Most sealing profiles fail for predictable reasons. By recognizing these issues early, it is possible to prevent them from shortening a product’s service life.

1. Incorrect material selection. Each environment places unique demands on seals. Exposure to extreme temperatures, aggressive chemicals, or continuous mechanical stress can cause premature failure if the material is not suited for the application.
   
2. Improper installation. Even the best seal will fail if installed incorrectly. Twisting, stretching, or damaging the profile during installation can create weak points that later lead to leaks.
   
3. Wear and tear. Over time, seals are exposed to friction, compression, and vibration. Without regular inspection and replacement, natural wear can progress unnoticed until performance is lost.
   
4. Environmental exposure. UV light, ozone, moisture, and salt can degrade some materials. Outdoor applications in particular require seals with high weather resistance.

Signs That a Seal May Be Failing

Maintenance teams can often spot early warning signs before a complete failure occurs. Stiffening, cracking, visible surface damage, or reduced elasticity are common indicators. Another signal is the need for repeated tightening of equipment or components, which often points to a seal losing its ability to maintain compression. Regular checks help detect these problems before they lead to larger breakdowns.

How to Extend the Service Life of Seals

While no seal lasts forever, careful planning and maintenance can make a significant difference. Companies can increase reliability and reduce lifecycle costs by focusing on a few essential practices:

• Choose the right material. Rubber, silicone, and TPE each perform best under different conditions. Considering temperature range, chemical exposure, and mechanical stress is critical to achieving a long-lasting result.
  
• Maintain regularly. Scheduled inspections, cleaning, and timely replacement prevent small issues from becoming costly failures. A proactive approach reduces downtime and keeps equipment running smoothly.

The Role of Design in Seal Durability

Material choice is only part of the equation. The design of the extrusion profile also affects how well a seal performs over time. Proper compression, tolerance, and shape all influence how effectively a profile maintains contact and prevents leakage. Working with an experienced manufacturer helps ensure that seals are tailored to both the mechanical and environmental requirements of the application.

Balancing Cost and Reliability

It can be tempting to save on material or installation costs, but cutting corners often leads to higher expenses later. A low-cost seal that fails prematurely may result in repeated replacements, lost production, and expensive repairs. In many industries, the total cost of ownership is much lower when seals are designed and maintained with long-term performance in mind.

Conclusion: Prevent Failure Before It Happens

Seal failure is rarely a sudden event. In most cases, it is the result of predictable issues such as poor material selection, incorrect installation, or neglect in maintenance. By understanding these causes and addressing them proactively, companies can extend the lifespan of their sealing solutions and avoid costly downtime.

The right material, the right design, and the right maintenance routine form the foundation for reliable sealing. At V.A.V. Group, we work with our customers to provide solutions that last, from material selection to custom design and long-term support. If you want to improve the reliability of your equipment and prevent seal failure, our experts are ready to help.

Artikkeli Understanding Seal Failure: Common Causes and How to Extend the Life of Your Sealing Solution julkaistiin ensimmäisen kerran V.A.V. Group.

Three materials stand out in industrial sealing: rubber, silicone, and thermoplastic elastomers (TPE). Each has its own strengths and limitations. By understanding the differences, it becomes easier to select a sealing solution that ensures reliability and long service life in your environment.

Why Material Choice Matters in Sealing Solutions

Seals are small components with a big impact. The wrong material choice can lead to leaks, vibration issues, or premature wear. These failures increase maintenance costs and may cause downtime in critical industries such as construction, marine, railway, and heavy machinery.

Selecting the right sealing profile from the start reduces lifecycle costs and improves overall system reliability.

Rubber Seals: Durable and Cost-Effective

Rubber has long been a standard choice for seals because it combines durability with affordability. Rubber profiles are elastic, abrasion-resistant, and able to handle mechanical stress. They are widely used in construction, automotive parts, and general industrial machinery, where cost control matters.

The main limitation is sensitivity to weathering. Standard rubber can degrade when exposed to UV light, ozone, or extreme conditions. Its temperature tolerance is also more limited compared to silicone. For applications where performance under harsh environments is not required, rubber remains a practical and economical choice.

Silicone Seals: Resistant to Heat and Weather

Silicone provides reliable performance where rubber falls short. Its wide temperature range, from about –60 °C up to +200 °C, makes it suitable for demanding conditions. Silicone also resists UV radiation and ozone, which ensures flexibility even after years of outdoor exposure.

These properties explain why silicone profiles are widely used in the rail industry, marine environments, healthcare equipment, and food processing machinery. The trade-off is cost. Silicone is more expensive than rubber, and in some cases, it does not match rubber’s mechanical strength. Still, for long-term reliability in harsh or fluctuating environments, silicone is often the best option.

TPE Profiles: A Versatile Middle Ground

Thermoplastic elastomers, or TPE, combine rubber-like elasticity with the processing advantages of thermoplastics. This gives them a versatile role in sealing applications. TPE profiles are recyclable and provide a balance between performance and cost, making them attractive to many industries.

They are commonly used in transportation, building profiles, and consumer products. TPE is easy to customize and can be adapted to different designs, but it cannot match silicone’s resistance to extreme heat or chemicals. Companies that value both performance and sustainability often find TPE to be a strong alternative.

Key Factors in Choosing a Sealing Material

The right choice depends on the environment and requirements of each project. When comparing materials, decision-makers often consider temperature tolerance, chemical resistance, and the expected mechanical stress on the seal. Regulatory standards such as ISO, EN, or FDA requirements also guide the selection process. Increasingly, sustainability plays a role as companies look for recyclable materials and lower environmental impact.

Rubber vs Silicone vs TPE: Quick Comparison

Conclusion: Selecting the Right Material

There is no single “best” sealing material. The optimal choice depends on the environment, budget, and performance needs. Rubber offers durability and cost efficiency in everyday industrial use. Silicone excels under extreme temperatures and outdoor exposure, making it the material of choice for demanding conditions. TPE strikes a balance, offering flexibility and sustainability benefits that meet modern industry requirements.

By weighing performance, cost, and environmental considerations, companies can select the sealing material that provides both reliability and value.

At V.A.V. Group, we help our customers design and manufacture custom sealing solutions that perform in even the toughest applications. Contact our experts to discuss the best material for your project.

Artikkeli Rubber vs Silicone vs TPE – Which Material Should You Choose for Industrial Sealing? julkaistiin ensimmäisen kerran V.A.V. Group.

EPDM (etyleenipropyleenidieneenimonomeeri) ja TPE (termoplastinen elastomeeri) ovat molemmat materiaaleja, joita käytetään laajasti eri teollisuudenaloilla niiden joustavuuden ja kestävyyden vuoksi, mutta niissä on merkittäviä eroja koostumuksen, ominaisuuksien ja käyttökohteiden suhteen. Nykyään TPE (tai TPV) korvaa EPDM:n monissa käyttötapauksissa, mutta miksi? Jotta ymmärtäisimme paremmin materiaalien väliset erot ja yhtäläisyydet, meidän tulee perehtyä niiden ominaisuuksiin hieman tarkemmin.

Käyttökohteet:

Koostumus: 

• EPDM: EPDM on synteettinen kumi, joka valmistetaan etyleenin, propyleenin ja pienen määrän dienemonomeereja polymeroinnilla. Sillä on tyydytetty polymeerirunko, mikä antaa sille erinomaisen kestävyyden ympäristötekijöille, kuten UV-säteilylle, otsonille ja sääolosuhteille.
• TPE: TPE on materiaaliluokka, joka yhdistää termoplastisten (kuten polyeteeni ja polypropeeni) ja elastomeerien (kuten kumi) ominaisuudet. TPE:t koostuvat yleensä kovista ja pehmeistä segmenteistä, joista pehmeät segmentit tarjoavat joustavuutta ja kovat segmentit rakenteellista lujuutta.

Koostumuksella ei ole merkittävää roolia profiilin varsinaisessa käytössä, mutta sillä on merkitystä valmistusprosessissa. EPDM-profiilit ovat paljon vaikeampia liittää yhteen kuin TPE- tai TPV-profiilit, mikä tarkoittaa, etteivät ne voi sulautua yhteen TPE/TPV-profiilien tavoin. EPDM-profiilin muotoilussa terävät kulmat tai pyöreät muodot vaativat liitoslohkon tai erillisen liimakomponentin, mikä voi myöhemmin muodostua heikoksi kohdaksi. TPE- ja TPV-profiilien päät yksinkertaisesti kuumennetaan, jonka jälkeen päät painetaan yhteen. Tämä luo hyvin luotettavan liitoksen, joka ei vaadi lisäliimoja tai muita materiaaleja. Tarkastellaan seuraavaksi fyysisiä ominaisuuksia: 

Fyysiset ominaisuudet: 

EPDM 

TPE 

Voimme jo nyt huomata, että TPE on mukautuvampi materiaali kuin EPDM, vaikka siitä voikin puuttua joitakin EPDM:lle tyypillisiä ominaisuuksia esimerkiksi lämpötilojen suhteen, mutta äärimmäisten lämpötilojen suhteen silikoni on toki ylivoimainen materiaali. TPV:tä voidaan pitää erittäin toimivana hybridinä näiden kahden materiaalin välillä. Useimmissa tapauksissa TPE voi suoraan korvata EPDM:n, mikä on todettu myös teollisuudessa viime vuosina. Saadaksemme paremman käsityksen siitä, miksi materiaaleja vaihdetaan, tarkastellaan seuraavaksi valmistusprosessia:

Käsittely: 

EPDM

EPDM käsitellään yleensä menetelmin kuten ekstruusio, ruiskuvalu ja puristusvalu. Sitä ei voi sulattaa ja käsitellä uudelleen kovettumisen jälkeen.

TPE

TPE:t ovat termoplastisia, mikä tarkoittaa, että niitä voidaan sulattaa ja käsitellä uudelleen useita kertoja. Ne soveltuvat hyvin ruiskuvaluun, puhallusvaluun ja ekstruusioon.

Suurin ero EPDM:n ja TPE:n välillä on kierrätettävyys. EPDM:tä ei voi kierrättää, joten se voidaan ainoastaan hävittää energiajätteen mukana tuotteen elinkaaren tultua päätökseen. Kierrätettävyys on myös tärkein syy siihen, miksi niin monet yritykset etsivät ekologisempia vaihtoehtoja EPDM:lle, kuten TPE tai TPV. Vaikkakin EPDM on usein edullisempi valmistaa, kokonaiskustannukset profiilin koko elinkaarelle voivat kohota TPE:tä korkeammiksi kun yhtälöön otetaan mukaan jätemaksut EPDM:n hävittämisestä. TPE ja TPV puolestaan voidaan sulattaa ja granuloida uusiokäyttöä varten.

Mitkä sitten ovat EPDM-, TPE- ja TPV-profiilien yleisimmät käyttökohteet? Alla on listattuna yleisimpiä käyttökohteita, mutta tietyillä muutoksilla tai lisäaineilla TPE tai TPV pystyvät korvaamaan EPDM:n useimmissa tapauksissa täysin.

Yhteenveto

EPDM on erityisvalmisteinen synteettinen kumi, joka on tunnettu sen erinomaisesta säänkestävyydestä, minkä vuoksi se on yleinen valinta säälle alttiisiin käyttökohteisiin ja tiivisteisiin. TPE taas on huomattavasti monipuolisempi materiaali, jota on saatavilla eri kovuuksilla, väreillä ja joustavuudella, ja joka on uudelleen käsiteltävissä. Näiden ominaisuuksien ansiosta se on erinomainen valinta useisiin teollisuuskohteisiin, mutta myös kuluttajahyödykkeisiin, joissa elastisuus, värivalikoima sekä prosessoinnin helppous ovat avaintekijöitä. Valinta EPDM:n ja TPE:n välillä riippuu vahvasti käyttökohteen vaatimuksista. Tapauksissa, joissa TPE pystyy suoraan korvaamaan EPDM:n, asiakkaamme päätyvät useimmiten TPE-profiileihin niiden kierrätettävyyden ja muiden etujen vuoksi. TPV ei ole yhtä laajasti käytössä kuin TPE, mutta se tarjoaa ratkaisun haastaviin kohteisiin, joissa TPE:n ominaisuudet ovat rajalliset EPDM:ään nähden.

Haluatko kuulla lisää EPDM:n korvaamisesta ympäristöystävällisemmillä materiaaleilla? Ota yhteyttä myyntipäälliköihimme, jotta voimme yhdessä löytää juuri sinun tarpeesi täyttävän ratkaisun!

Artikkeli EPDM vs. TPE – Miten materiaalit eroavat toisistaan? julkaistiin ensimmäisen kerran V.A.V. Group.

Similar uses of TPE and TPU

In fact, both of them are Thermoplastic Elastomers, which is abbreviated as TPE. TPU refers to TPE-U whereas TPE is a common name for TPE-S type of thermoplastic elastomer. The main difference between them is the polymer used as the base of the material. Since the more precise naming is often limited to professional use, in this article we use the common terms TPE and TPU for clarity.

Both TPE (Thermoplastic Elastomer) and TPU (Thermoplastic Polyurethane) are versatile materials used in a variety of applications due to their flexibility, durability, and ease of processing. Here are some common uses:

1. Automotive Industry:
   • Seals and Gaskets: Both materials are used for seals and gaskets due to their excellent flexibility and resistance to various chemicals.
   • Interior Components: TPE and TPU are used in automotive interiors for parts like dashboards, door panels, and handles.
2. Medical Devices:
   • Tubing and Catheters: Both materials are used in medical tubing and catheters because they are biocompatible and can be sterilized.
   • Wearable Medical Devices: TPE and TPU are used in the production of flexible and comfortable wearable medical devices.
3. Consumer Products:
   • Footwear: Both materials are popular in the footwear industry for making soles and other flexible components.
   • Sporting Goods: TPE and TPU are used in various sporting goods, such as grips, protective gear, and flexible components.
4. Electronics:
   • Cable Insulation: Both materials are used for insulating electrical cables due to their flexibility and durability.
   • Protective Cases: TPE and TPU are used in making protective cases for electronic devices like smartphones and tablets.

While we are not specialized in footwear or sports equipment, we do excel in seals, gaskets and tubes. Our Bio-TPE is the ecological alternative for TPE, being fully recyclable. Read more about our solution to reduce the use of fossil materials here.

When TPE is a better option

One of the biggest differences you will notice when picking up a piece of a TPE and a TPU profile is the feel: TPE is softer to touch and more flexible. TPE may be a better choice over TPU in certain scenarios due to its unique properties:

1. Cost-Effectiveness:
   • TPE is generally less expensive than TPU, making it a cost-effective option for applications where budget is a concern.
2. Softness and Flexibility:
   • TPE is softer and more flexible compared to TPU, which makes it ideal for applications requiring a gentle touch, such as soft grips and flexible seals. TPE also maintains its flexibility for a longer period of time.
3. Ease of Processing:
   • TPE is easier to process and mold into complex shapes, which can be beneficial in manufacturing processes that require high precision.
4. Recyclability:
   • TPE is often easier to recycle than TPU, making it a more environmentally friendly option for applications where sustainability is important. With our Bio-TPE, the ecological benefit is even greater.

When TPU is a better option

TPU (Thermoplastic Polyurethane) has several advantages over TPE (Thermoplastic Elastomer) that make it a better choice in certain applications:

1. Abrasion Resistance:
   • TPU is more abrasion-resistant than TPE, making it ideal for applications where the material will be subjected to wear and tear. This property ensures a longer lifespan for products made from TPU.
2. Chemical Resistance:
   • TPU has higher resistance to chemicals, such as oils, greases, and various solvents. This makes it suitable for environments where exposure to harsh chemicals is common. With certain additives, the chemical resistance of TPE can be enhanced, so the difference is not that big nowadays.
3. Dimensional Stability:
   • TPU is less prone to shrinking and maintains its dimensions more consistently than TPE. This is important for applications requiring precise and stable dimensions over time.
4. Surface Finish:
   • TPU has a smoother surface finish compared to the rubbery texture of TPE. This can be beneficial for applications where a smooth, aesthetically pleasing surface is desired.

Applications Where TPU Excels

Given these advantages, TPU is often the better choice for the following applications:

1. Industrial Components:
   • TPU’s chemical resistance and durability make it suitable for seals, gaskets, and other industrial components exposed to oils, greases, and solvents.
2. Automotive Parts:
   • TPU is preferred for automotive parts that require high wear resistance and exposure to chemicals, such as hoses, gaskets, and interior components.
3. Medical Devices:
   • The biocompatibility and durability of TPU make it suitable for medical devices that need to maintain their properties in various conditions.

TPU can be processed using injection molding and extrusion, and it is well-suited for complex and precise shapes. It is also a recyclable material, but its processing can be slightly more challenging compared to TPE.

Summary

Flexibility and Softness: TPE is generally softer and more flexible than TPU.

Chemical Resistance: Standard TPU has higher chemical resistance than standard TPE. However, the chemical resistance of TPE can be improved with certain additives.

Temperature Resistance: TPU retains its elasticity better in cold temperatures.

Applications: Both materials are versatile, but TPU is better suited for applications requiring high abrasion resistance.

Recyclability: TPE is easier to recycle and it is the more environmentally friendly option of the two. With our Bio-TPE, that benefit is even greater.

Versatility: Being the softer, more processable material, TPE can be processed into more complex and delicate shapes and forms.

TPE solutions have surpassed TPU in many use cases, being the more versatile material of the two. When it comes to seals, profiles and gaskets, we are eager to tackle new challenges with our TPE solutions if you are looking for a more ecological and cost-efficient solution to replace TPU profiles.

Artikkeli TPE vs. TPU – What’s the difference? julkaistiin ensimmäisen kerran V.A.V. Group.

MATERIALS USED IN PROFILE MANUFACTURING

Seal profile materials are designed and selected according to their intended use and operating conditions. V.A.V. Group makes its own raw material mix for seal profiles, which allows us to have complete control over the various properties of the profile, whether it is hardness, color, or other special features.
The primary materials used for profiles are silicone rubber, TPV (thermoplastic vulcanizate), and TPE (thermoplastic elastomer). These materials all have their functional properties, with some overlap in potential use cases. Silicone rubber has the broadest operating temperature range, and TPE and TPV profiles have excellent chemical resistance, which makes both well-suited for multi-component seals. Fire X is our self-extinguishing silicone profile that fits European standards for rolling stock, the maritime industry, and other sectors. It can also be used for doors and windows in other transport industries.

SILICONE RUBBER

What is silicone rubber?

Silicone rubber is a versatile, synthetic elastomer made from a polymer composed of silicon, oxygen, carbon, and hydrogen. It is widely used in various industries, including automotive, medical, and consumer goods, due to its stability over a wide temperature range and resistance to environmental factors. Its applications range from seals and gaskets to medical devices and kitchenware.

Silicone rubber is an excellent material for demanding conditions. We can adapt its properties to fit various operating environments; the properties of silicone rubber include resistance to steam, pressure, moisture, chemicals and oils, UV, and ozone. Silicone rubber has a superior operating temperature range, making it a perfect choice for almost any industry.

Properties of silicone rubber 

• Operating temperature of -80 °C – +250 °C
• Extruded hardness Shore A 10-80
• Tensile strength 200-1500 PSI
• Basic, metallic, and RAL chart -colors

Silicone rubber is commonly used for insulation in many industries and is an excellent electrical insulator. We also manufacture non-stretch silicone profiles, foam silicone, and self-adhesive seals, all of which have their own special advantages. Silicone rubber has an incredible range of applications.

Applications for silicone rubber

• Window and door seals
• Silicone tubing (including food-grade silicone)
• Pressure profiles
• Appliance seals
• Rings and gaskets
• HVAC tubing

Even though silicone as a raw material is not exactly recyclable, it has significant advantages, like its long service life, that still make it an ecological choice, especially when you get it from us. We at V.A.V. Group have the advantage of creating small to medium-sized batches, perfectly meeting the needs of manufacturers without risking leftover products going to waste.

FOAM SILICONE

What makes foam silicone different from our other profiles is its “spongy” closed cell silicone structure, which works almost like a foam mattress; it’s thick and sturdy and holds its shape well, making it especially great for example, insulating corners, where it provides support and keeps out the cold air and outside noise. Our foam silicone comes quite often as a co-extruded structure with two different grades of hardness: the soft, flexible, round, and insulating part and the harder “spine” that settles into the groove and makes installation easy while keeping the seal from stretching. We can also provide threaded foam silicone, which absolutely prevents the silicone from stretching.

The spongy structure of foam silicone makes it an excellent noise insulator, perfect for loud urban environments.

The properties of foam silicone aren’t too different from our other profiles, but there are some areas where it excels. Noise penetrates better than air and will slip through even the smallest of cracks, but foam silicone has exceptional noise-canceling properties. For example, proofing your front door or balcony doors with foam silicone can notably muffle outside noise, something that people living in big city apartments are all too familiar with. We recommend installing the foam silicone on the warmer doorcase side instead of the leaf for best results.

Foam silicone is still criminally unrecognized, even when it has the potential to be a real game-changer for insulation, as well as for noise-canceling in big cities and homes near highways.

FLUOROSILICONE

What is the difference between silicone and fluorosilicone? 

Silicone and fluorosilicone are elastomers made from oxygen, carbon, and hydrogen but differ in their polymer chains and properties. Silicone has a silicone polymer chain, while fluorosilicone includes fluorine atoms, changing some of its chemical and physical properties.

In summary, silicone is flexible and elongates well, while fluorosilicone is more heat and chemical-resistant, stronger, and more durable. The right material should be chosen based on these properties.

PLATINUM SILICONE

Platinum silicone or platinum-cured silicone uses, as you could guess from the name, a platinum-based catalyst to cure. The process results in a material that is free from any by-products like peroxides, which makes it safe for medical- or food-grade products. Platinum silicone has high thermal temperature, chemical resistance, and elasticity.

Due to its high purity and non-toxicity, platinum silicone can be used in medical devices, kitchenware, and baby products. It is also clearer than other silicone types and maintains this clarity without yellowing over time.

CHLORINE-FREE SILICONE

Chlorine – or halogen-free silicone profiles are produced by adding organic, chlorine-free peroxides to the silicone during its vulcanization instead of the traditional peroxide that has been used for decades in the silicone vulcanization process. Chlorine-free silicone can be used in all profile applications, from door and window gaskets to ventilation systems and many more.  

The benefits of chlorine-free properties are important, for example, in shipbuilding and rolling stock sectors, where silicone profiles work as a fire-safe insulator. One of the advantages of chlorine-free silicone is that should it be exposed to flames and burn; it will not produce harmful chlorine compounds or hydrochloric acid.

FIRE X SILICONE

Fire X profiles are made of self-extinguishing silicone that withstand temperatures up to 300°C. Not only does the Fire X withstand extremely high temperatures for long periods of time, but it is also fire-retardant and non-flammable in itself. 

In comparison to intumescent seals and profiles that expand when exposed to high temperatures, Fire X profiles are airtight in all temperatures. This prevents the spread of smoke, carbon monoxide, and other dangerous gases to other rooms or compartments before the temperature rises to a certain level. Since carbon monoxide can reach dangerous levels without an actual fire, Fire X seals are significantly safer than seals and profiles that only prevent the spreading of fires. Furthermore, if the compartments are sealed air-tight with Fire X profiles, they will significantly slow the spread of fire or even suffocate the flames in certain conditions. 

In normal conditions, the Fire X profiles act as normal silicone profiles, unlike intumescent seals that have little to no sealing capability without high temperatures.

Fire X is a silicone profile enhanced with fire-retardant and halogen-free materials. In short, the seals and profiles (along with other materials used in trains and their interiors) cannot ignite easily, burn aggressively at any point, or emit toxic fumes when predisposed to extreme heat. Fire X profiles are treated so that they will not burn but rather smolder and char even at the highest temperatures, maintaining their ability to prevent fires from spreading. This is a crucial feature for any profiles used in doors, windows, and latches on rolling stock.

Halogen-free profiles enhance the safety of railway passengers as well as firefighters sent to the scene, as they will not be exposed to toxic gases. Halogen gases are also highly corrosive, which may cause further damage to other components of the vehicle (or building).

The fire retardant Fire X profile ensures the safety of the crew and passengers and has the following fire safety certificates:

• IMO FTPC Part 2 & 5
• UL 94 V Classification V0
• EN 45545-2

Fire X and TPV can replace the commonly used EPDM, which can also be treated to withstand extreme temperatures. The advantages of Fire X, compared to EPDM, are a greater variety of hardnesses and colors, along with more manageable and often more reliable joints in angles or round shapes.

Main properties of different silicone compounds

Conventional silicone rubber

Silicone rubber is a very versatile synthetic elastomer. It is widely used in various industries, including automotive, medical, and consumer goods, due to its stability over a wide temperature range and resistance to environmental factors. Its applications range from seals and gaskets to medical devices and kitchenware.

• Heat resistance: Breaks down above 149°C
• Excellent flexibility and elongation
• Generally food-safe

Foam silicone

• Foam silicone has a its “spongy” closed cell silicone structure
• Great for insulating corners, windows and doors, where it provides support and keeps out the cold air and outside noise.
• Foam silicone is often co-extruded with harder surface protecting the softer inner material as well as often acting as a spine for installation purposes.

Fluorosilicone

• Heat resistance: Withstands up to 204°C
• Higher chemical resistance
• Lower flexibility and elongation but higher tensile strength and tear resistance. Longer lifespan, more stable, and less prone to swelling and shrinking compared to silicone

Platinum Silicone

• Heat resistance: Withstands up to 230°C
• Safe for medical- or food-grade products.
• High chemical resistance, and elasticity.
• Usually clearer than other silicone types and maintains this clarity without yellowing over time.

Chlorine-Free Silicone

• Chlorine-Free Silicone will not produce harmful chlorine compounds or hydrochloric acid when exposed to extreme temperatures (fire).

Fire X Silicone

• Self-extinguishing, non-flammable
• Operating temperature of up to 300°C
• IMO FTPC Part 2 & 5
• UL 94 V Classification V0
• EN 45545-2

TPE – THERMOPLASTIC ELASTOMER

What is TPE?

TPE is a class of materials that combines the properties of thermoplastics (like polyethylene and polypropylene) with elastomers (like rubber). TPEs are typically composed of a mixture of hard and soft segments, with the soft segments providing elasticity and the hard segments providing structural integrity.

TPE seals and profiles offer flexibility, resilience, and excellent sealing capabilities. They are softer and more elastic than PVC, making them suitable for applications requiring a tight seal and flexibility. The latest material developments have brought more rigid TPE materials to the market, thus closing the gap in this sector.

While a material like PVC typically has a higher melting point and is more suitable for high-temperature applications, TPE excels in low-temperature flexibility, ensuring effective sealing even in cold climates. TPE can also be treated to withstand very high temperatures, up to the point of being fireproof.

  Properties of TPE

• Excellent flexibility and elasticity
• Wide range of hardness options, from very soft to rigid
• Wide range of color options
• Moderate to excellent resistance to UV radiation and weathering, depending on the specific formulation
• Good chemical resistance can vary based on the TPE type
• Extremely versatile when it comes to thickness, shape, and size
• Hardness 40 Shore A – 45 Shore D
• Operating temperature of -40 – +120°C

TPE’s flexibility and elasticity make it ideal for applications where a secure and pliable seal is necessary. TPE seals are used in industries like automotive, where they are employed in weather-stripping and fenestration applications, providing an effective seal for doors and windows. The softness of TPE makes it suitable for areas where impact resistance and noise reduction are essential. 

    Applications for TPE

• Soft-touch grips and handles
• Overmolded parts and handles on tools and consumer products
• Automotive interior components, e.g. dashboard trim and cup holders
• Appliance seals
• Medical devices and equipment
• Cable and wire insulation

TPE materials are also known for their recyclability and environmental friendliness. TPE is often considered a more environmentally friendly option than materials like PVC and EPDM, as it can be reprocessed. While a material like PVC is generally more cost-effective than TPE, TPE’s superior performance and environmental considerations may justify its higher initial cost in specific applications. Thanks to its recyclability, TPE can become more cost-effective than PVC when considering disposal costs.

Due to its recyclability, TPE can be more cost-effective than other alternatives, like PVC.

TPV – THERMOPLASTIC VULCANIZATES

Thermoplastic vulcanizates (TPV) are part of the thermoplastic elastomer (TPE) family of polymers but are closest in elastomeric properties to EPDM thermoset rubber, combining the characteristics of vulcanized rubber with the processing properties of thermoplastics. Like TPE, TPV is recyclable and has good UV, ozone, and chemical resistance, and in some cases, even greater resistance than EPDM. 

What is the difference between TPE and TPV?

TPE is a mixture of rubber and plastic that can stretch under stress but snaps back into shape afterwards.TPV includes a blend of EPDM rubber and polypropylene which, when vulcanized, makes it highly resistant to heat and compression.

Our selection includes combinations of foam and hard TPV. Our TPV material has been tested accordingly for EN45545-2 R22/23 HL2.

Applications for TPV are much the same as those for TPE.

♻ BIO-TPE

Our selection also includes Bio-TPE, in which 65 % of fossil materials have been replaced with bio-based oils, making it an ecological alternative for TPE. Like TPE, Bio-TPE is a fully recyclable material with the same features as TPE. 

Like regular TPE, Bio-TPE is a fully recyclable, non-toxic material, and it has the same excellent chemical resistances and hardness of 50-90 ShA in a full RAL color scale.

PVC, EPDM, OR TPE?

In this section, we have shared some basic information about PVC and EPDM. These materials have been commonly used in profile manufacturing for a long time, but they are currently being replaced by more environmentally friendly alternatives.

Note: V.A.V. Group does not produce PVC or EPDM profiles. In most cases, they can be easily replaced by custom-treated TPE, TPV, or silicone materials.

PVC – POLYVINYL CHLORIDE

PVC is a synthetic plastic polymer known for its durability and versatility. It exhibits excellent resistance to chemicals, weathering, and UV radiation. PVC seals and profiles are rigid and provide stability, making them ideal for applications where structural integrity is crucial. Additionally, PVC is cost-effective, making it a popular and affordable choice in the construction industry.

Speaking of construction, PVC is commonly used in applications where structural stability is critical, such as window frames, door frames, and pipe fittings. Its rigid nature ensures long-term durability and resistance to wear and tear. PVC profiles are widely utilized in construction due to their affordability and ability to withstand harsh environmental conditions.

PVC typically has a higher melting point than TPE, making it more suitable for applications where high temperatures may be a concern. Conversely, TPE excels in low-temperature flexibility, ensuring effective sealing even in cold climates. However, TPE can be treated to withstand very high temperatures, up to the point of being fireproof, at which point it can effectively replace PVC.

EPDM

EPDM (Ethylene Propylene Diene Monomer) and TPE (Thermoplastic Elastomer) are both materials commonly used in various industries for their flexibility and durability, but they have distinct differences in terms of composition, properties, and applications.

EPDM is a synthetic rubber made from the polymerization of ethylene, propylene, and a small amount of diene monomers. It has a saturated polymer backbone, which gives it excellent resistance to environmental factors like UV radiation, ozone, and weathering.

The composition itself does not play a significant role in the actual use of the profile, but it does in the manufacturing process. EPDM profiles are a lot harder to join together than TPE or TPV profiles, which means they cannot be “welded” together like our TPE/TPV profiles. To create angles or round shapes from an EPDM profile, the joint requires a joining block or an adhesive, which may become a weak link later on. TPE and TPV profile ends are simply heated, and the two ends are then pushed together to form a very reliable connection that requires no additional adhesives or other materials.

Even though it may lack some of EPDM’s features, TPE is more customizable than EPDM. TPV can be considered a highly functional hybrid between these two materials. In most cases, TPE can replace EPDM, which we have seen in the industry in the past years. One reason for this is that EPDM is typically processed using methods like extrusion, injection molding, and compression molding. It cannot be re-melted and reprocessed after curing. TPEs, however, are thermoplastic, which means they can be melted and reprocessed multiple times. They are well-suited for injection molding, blow molding, and extrusion processes.

This brings us to the biggest difference between EPDM and TPE, the recyclability. EPDM cannot be recycled, so it can only be disposed of as energy waste after its lifecycle has come to an end. It is also the main reason why several companies are looking for more environmentally-friendly alternatives, such as TPE or TPV. EPDM is often cheaper to produce, but because of its disposable nature, the total cost may actually become higher after waste management costs, whereas TPE and TPV can be melted and granulated after use.

ARE YOU LOOKING FOR A PVC OR EPDM REPLACEMENT?

The choice between PVC, EPDM, silicone, and TPE seals and profiles ultimately depends on the application’s specific requirements. Silicone has amazing temperature-resisting properties, PVC offers durability and structural stability, and EPDM offers weather resistance and insulation properties at a lower cost, while TPE provides flexibility, resilience, and environmental benefits. However, our modern solutions for TPE use have increased structural strength to the point where TPE can widely replace PVC and EDPM in most circumstances. 

Understanding the performance characteristics and considering factors such as temperature resistance, environmental impact, and budget constraints will guide the selection process, ensuring the optimal choice for each unique application in the construction and manufacturing industries.

IS TPE BETTER THAN SILICONE?

Between TPE and silicone, there is no clear winner as to which one is “better” since they both excel in their own fields of use. Here is a clear side-by-side comparison of their properties:

As seen in the table, it’s a pretty even match between the two until the optional and special properties, that can be added to silicone profiles in our downstream operations. TPE’s advantage over silicone is that it can be produced in higher hardnesses than silicone and is fully recyclable, whereas silicone has to be disposed of by incineration at the end of its lifecycle*. Silicone easily beats other materials with its wide range of operating temperatures.

* Some recycling centers for silicone exist in Europe. They are few and far between, and the transportation of used silicone profiles from Finland to these centers would ultimately undo any environmental benefits of the recycling itself.

CUSTOM SOLUTIONS BY V.A.V. GROUP

In conclusion, the profile materials we provide all fit the needs and are widely used in construction, heavy industry, and transportation due to their easily customizable properties, high quality, and fast and flexible production times. 

While we might be best known for top-quality seals and profiles for transportation, construction, and heavy industry, and those three categories are indeed the largest sectors we do business with, they are not the only ones. Our ability to create custom extrusion tools lets us produce products for a wide variety of uses, from brewing tanks and composter seals to food-grade feeding tubes for calves.

Combined with flexibility and reliability, we can offer our customers a fast supply of products, with prototypes delivered in two weeks from when we receive the drawings or model of the product. Often, a customer’s R&D process requires several experimental prototypes before the final product design is found, but with our fast prototyping rounds, this part of the process becomes easy and efficient. We design and manufacture products from the start to fit the customer’s specific needs. The goal is to together create a prototype that follows the customer’s plans and that they can approve of without feeling like the resulting prototype is completely unrecognizable from their original idea.

We consider quality an element of reliability and are firmly committed to high-quality production. Our guiding principle is to find the best solution for each customer in order to ensure their success and competitiveness. With our flexible production lines, co-extrusion capabilities, speed in modifying products to customer specifications, and sometimes even co-designing the perfect solution to customers’ problems, we can say that innovativeness is the key driver in our company culture.

READ ABOUT OUR CUSTOMER CASES

Doors for generations – Hellbergs Dörrar

Hellbergs Dörrar is a Swedish steel door manufacturer that specialises in fire protection, soundproofing, and other high-security doors.

From craft breweries to calf feeders – Our more curious customer cases

We looked back on our more curious customer cases along the years with project manager Hannu and head engineer Tuomas.

Making sure the ship sets sail on time

Anyone who has ever been a part of a construction project knows how crucial it is to finish every stage on time to maintain the set schedule.

Artikkeli PROFILE & SEAL MATERIAL SELECTION GUIDE julkaistiin ensimmäisen kerran V.A.V. Group.

Different methods for making frames and rings

We have several ways to make silicone and TPE profiles into frames, rings, hoops and other similar products. The production method is chosen according to the customer’s needs and the material of the profile. The dimensions of the ring or frame to be manufactured are obtained from the customer, and the elasticity of the material, for example, is taken into account before the product is manufactured. 

Silicone profiles can be joined together either by vulcanisation or by adhesive bonding. In vulcanisation, either silicone paste or liquid silicone, more commonly called thermal adhesive, is placed between the profiles to be joined. Thermal adhesive is used when the product is so small or delicate, that the parts cannot be physically pressed together too tightly during the joining process. A lower temperature is also sufficient for thermal adhesive. Finally, the profiles are vulcanised together using heat. The vulcanisation process results in a very durable and high-quality joint. The method of joining therefore depends primarily on the size of the product.

TPE profiles can be joined either by mirror welding or by adhesive bonding. In mirror welding, the ends of the TPE profiles are melted and then pressed together to form the joint. The joint becomes very neat and resists stress very well. With adhesive bonding, both silicone and TPE profiles are bonded using a special glue that holds the joint together very well. Bonding is used in smaller batches where speed and economy are critical or when the product itself is small. 

Vulcanisation and mirror welding require profile-specific tooling and are suitable for the most demanding solutions. These methods require more time and effort on the production line, which is why they are recommended for larger production batches.

TPE or TPU? Find out which one fits your requirements the best!

Durable profiles for all environments

Our profiles go through several different treatments to make sure they are durable and ready to be installed. Because they are used in so many different industries for so many different purposes, they need to be prepared to last as long as possible, even in harsh conditions.

In downstream operations the manufacturing process is simple enough; the profiles that arrive from the production line are measured and cut to the right length and holes are made for vents and valves according to the order. The profiles are shaped and prepared with tools like a heat gun and a curing press, depending on what kind of properties the profile needs. For example, large profiles meant for construction are usually cut to the right shape and then treated with a heat gun. 

The profiles used for machines in the paper industry have to endure strong air compression and withstand high temperatures. Some profiles come into contact with different dissolvents or oils and so they need to be durable enough that they don’t get damaged. For some use cases, like on fire doors, trains, and ships, the profiles must also have fire safety certificates. Profiles, like our Fire X, that are treated for fire safety have a thermal resistance of over 270°C and can slow down the spread of fire, even in extreme conditions. Properties like these are added to the profile during our manufacturing process.

From the production line to the client

Our strengths lie in the flexible and fast supply of small to medium-sized volumes. The goal is to have your product ready within two weeks of the order, and if there are ever sudden changes in supply sizes, our downstream operations can be directly in contact with the client. We aim to offer a reliable service every time. That’s why we actively listen to feedback and are constantly developing in terms of new processing methods and equipment, as well as improving the sustainability of materials and methods used on our production lines. 

If you want more information on the ordering process and the time it takes to get your first tool sample, click here!

Artikkeli Frames, rings and attachments from silicone or TPE julkaistiin ensimmäisen kerran V.A.V. Group.

TPE or thermoplastic elastomers are a class of copolymers or a physical mix of polymers – usually a plastic and a rubber – which consist of materials with both thermoplastic and elastomeric properties. In the new Bio-TPE, 65% of the fossil raw materials have been replaced with Bio-based oils, making it a more ecological and environmentally friendly option. Like regular TPE, Bio-TPE is a fully recyclable, non-toxic material.

TPE gives a much smoother surface appearance and a faster extrusion process, which is already beneficial. The more ecological Bio-TPE has all the same properties as regular TPE, including excellent chemical resistance, hardness of 50-90 ShA, with a full RAL color scale available.

TPE profiles are used in the construction industry as well as in other industrial applications according to the customer’s required specifications. They come in several different colors, manufactured as per the customer’s requirements. As a material, it is well suited for multi-component seals. 

If you are interested in hearing more about Bio-TPE, feel free to ask for more information from your point of contact here at V.A.V. Group.

Artikkeli Ecological Bio-TPE Profile Material Is Now Available julkaistiin ensimmäisen kerran V.A.V. Group.