AS, PP and TPR are three different substances. AS and PP are usually two parts, which are combined by physical or mechanical action, while TPR soft glue is usually bonded to the surface of PP or AS by secondary injection molding.
Because it is acrylonitrile-styrene polymer and transparent plastic particles, its strength is higher than GPPS；; ; PP is polypropylene, including homopolymerization and * * * poly, and its appearance is translucent or highly transparent particles; TPR is a thermoplastic elastomer. TPR is a kind of soft plastic similar to rubber, which can be injection-blown and completely bonded with hard rubber such as PP, ABS, PS, PC and PA.
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TPR materials are widely used in daily necessities, adult products, hardware tools, luggage wheels, sports equipment, toy products, auto parts, medical supplies, wires and cables, electronic appliances, communication instruments, shoes and so on.
Among them, the shoe material and toy industry are mainly the application fields of TPR based on SBS, and the modified materials based on SEBS are mainly used for products with aging resistance, weather resistance, high tensile strength and ultra-low hardness (5 degrees lower than Shore hardness).
TPR material is superior to rubber in softness and comfort, but it is inferior to vulcanized rubber in tensile strength, fatigue resistance and mechanical properties. The temperature range is -45~90℃. Generally, the TPR material is based on SBS, and its chemical properties are as follows: general weather resistance and aging resistance, with a temperature resistance of 70~75℃. If you need a material with good aging resistance and temperature resistance, you can choose the modified material of SEBS substrate.
Baidu encyclopedia -TPR material