TPR compound

TPR(Thermoplastic Rubber)
This copolymer with multiple blocks of ploystyrene connected by rubbery segments has become commercially available since the early 1960s.
It exhibits high strength and elastomeric characteristics without chemical cross-linking.
Shell Chemical Company started the markeing of TPR under the trade-mark Kraton which do not require vulcanization, but have high strength and elastomeric properties. Unlike plastics, these materials exhibit low permanent set after extension and are highly flexible and resilient.
Surface friction is high, with coefficient-of-friction values similar to those of conventional vulcanized rubbers. These advantages are summarized as follows,

• Processing
  No premastication required
  No vulcanization required
  Easy processing on standard thermoplastic proccesing equipment

• Performance
  High strength
  High elastic and resilience
  Flexible at low temperature
  Resistant to most acids and alkali.
  Can be formulated to produce a wide range of property combinations for many different end-application.

• Application
  Footwear, Gaskets, weather stripe, Hose and tubing, Sporting goods, Toys, Car Mat and non-slip packing for Pallet Grips.