Both TPE and TPR are generic names. Their full names are thermoplastic elastomers and thermoplastic rubbers respectively. They both refer to the same type of material, ie rubber-like elasticity at room temperature, melting at high temperatures, and thermoplastic processing. In the narrow sense, TPE or TPR refers to the use of styrenated block copolymers (SBS, SEBS, SEPS, SIS, etc.) as the base material, supplemented with other polymers, fillers, and processing aids to prepare thermoplastic elastomer blends. Such elastomer blends usually contain:
1. Styrene-based block copolymer elastomer polymer: a single specification or a variety of specifications, the role is to provide flexibility
2. Filling oil: It is usually a straight chain paraffin oil such as white oil. Its role is to adjust hardness and fluidity.
3. Other polymers, such as polypropylene or other polyolefins, may also be other engineering plastics or engineering elastomers such as TPU, TPEE, etc., and may be used alone or in combination with multiple materials to regulate hardness, control costs, and/or Gives TPE Blend Specific Performance
4. Compatibilizer: It is used to improve the compatibility between polar materials and non-polar materials and improve the performance of materials. It can also improve the substrate of TPE and polar engineering plastics in the occasion of secondary injection (rubber encapsulation) etc. Compatibility
5, other functional modifiers: to give TPE other special properties, such as polyphenylene ether (PPO) can increase the styrene block copolymer styrene segment glass transition temperature, thereby improving the TPE blend heat resistance, etc.
6, filler: usually talc, calcium carbonate and other mineral fillers, the main role is to control the cost, in addition to the mechanical strength of the material, hardness and other properties have a certain impact
7. Functional additives: such as flame retardants, lubricants, antistatic agents, antibacterial agents, etc., used to impart specific properties to the blended elastomer;
8. Anti-oxidants/anti-ultraviolet aging agents: used to slow down the degradation/aging process of materials during thermal processing and use