What are the uses of TPE thermoplastic elastomers with different hardnesses?

From the soft touch of baby pacifiers to the tough protection of car bumpers, the application of TPE thermoplastic elastomers is almost everywhere. Behind this, the flexible regulation of its hardness is the key - different hardnesses give the material completely different properties and uses. So, how does the hardness gradient of TPE correspond to specific applications? How to choose the appropriate hardness according to needs? Let's explore it in depth with the editor of Huizhou Zhongsuwang.

The hardness range of TPE thermoplastic elastomers spans a wide range (ShoreA0~100 to ShoreD60), and the functions corresponding to different hardnesses are very different:

Ultra-soft hardness (ShoreA0~20)

This type of TPE thermoplastic elastomer material feels as soft as gel, has strong elasticity and good fit, and is commonly used in medical catheters, baby pacifiers, and shock-proof cushions for electronic devices in the medical field, using its low friction and biocompatibility to achieve safety protection.

Soft hardness (ShoreA20~50)

This hardness of TPE thermoplastic elastomer has both soft touch and toughness, and is widely used in scenes such as car steering wheel grips and yoga mats. It can provide a comfortable grip through elasticity, and can resist daily bending and is not easily damaged. The tension band of sports equipment also relies on the tear resistance of this hardness range.

Medium hardness (ShoreA50~80)

It is in a state of rigid-elastic balance and is suitable for functional parts that require structural support. In industry, this TPE thermoplastic elastomer is often used as a sealing ring and shock-absorbing foot pad to resist vibration by using its sealing property; toy models and stationery erasers use moderate hardness to balance the shape stability and use experience.

Hard hardness (ShoreA80~100/ShoreD20~40)

Close to hard plastic but retains elasticity. Automobile bumper buffer blocks and electronic equipment housings often use this range - they can withstand impact through rigidity and reduce cracking with micro-elasticity. Pipe seals in the construction field also rely on their hardness to support the structure.

High hardness (ShoreD40~60)

Belonging to semi-rigid materials, this type of TPE thermoplastic elastomer can replace some metals or engineering plastics. In scenes such as mechanical gears and ski shock absorbers, it balances hardness and elasticity with low noise and self-lubricating characteristics, improving performance while reducing weight in sports equipment.

In fact, hardness selection needs to be combined with load, environment and medium - soft materials focus on touch, medium-hard materials focus on durability, and extreme hardness (ultra-soft or high-hard) serves special needs such as medical and industrial. For example, outdoor products often choose medium hardness to resist aging, and precision instrument accessories tend to use ultra-soft hardness to reduce wear.

In summary, whether it is medical products that pursue extreme softness or industrial parts that require a balance of rigidity and elasticity, accurate hardness selection is the key to unlocking their functional potential. As industry demands continue to refine, the performance boundaries of TPE thermoplastic elastomers will continue to expand in the future. Through more refined hardness control and formula innovation, Zhongsuwang will also bring functional and economical solutions to more fields.