Our wide range of TPE seals and profiles is already well-known across Europe and overseas, and recently we have been asked the question whether TPE can replace TPU in certain use cases. With our R&D projects we have been able to create new TPE solutions with special attributes, such as fire-retardant additives or food-grade materials. The two materials have different properties and thus different use cases, but modern technology is narrowing the gap between them quite rapidly. Let’s look at both of them on a more detailed level to see to what extent TPE can replace TPU.
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:
- 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.
- 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.
- 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.
- 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:
- Cost-Effectiveness:
- TPE is generally less expensive than TPU, making it a cost-effective option for applications where budget is a concern.
- 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.
- Ease of Processing:
- TPE is easier to process and mold into complex shapes, which can be beneficial in manufacturing processes that require high precision.
- 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:
- 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.
- 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.
- 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.
- 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:
- Industrial Components:
- TPU’s chemical resistance and durability make it suitable for seals, gaskets, and other industrial components exposed to oils, greases, and solvents.
- Automotive Parts:
- TPU is preferred for automotive parts that require high wear resistance and exposure to chemicals, such as hoses, gaskets, and interior components.
- 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.
