PP is a semi crystalline material that is harder and has a higher melting point than PE. Due to the brittleness of homopolymer type PP at temperatures above 0 ℃, many commercial PP materials are random copolymers with 1-4% ethylene added or block copolymers with higher ethylene content. Copolymer type PP materials have lower thermal deformation temperature (100 ℃), low transparency, low glossiness, and low rigidity, but they have stronger impact strength. The impact strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150 ℃. Due to its high crystallinity, this material has excellent surface stiffness and scratch resistance. PP does not have environmental stress cracking issues. Usually, PP is modified by adding glass fiber, metal additives, or thermoplastic rubber. Modified Polypropylene (PP) refers to the processing of polypropylene (PP) plastics through filling, blending, and reinforcement methods, resulting in flame retardancy, high impact resistance, and other properties. PP modified plastics are a plastic industry field that involves a wide range of fields, high technological content, and can create huge economic benefits. In order to reduce the cost of plastic products, improve or enhance the performance of certain aspects of plastic materials, and increase functionality, plastic modification technology is indispensable. Compared with engineering plastics, it saves a lot of costs and is more flexible in performance design. Simply put, pure polypropylene resin can have new properties or enhance its original properties through modification. Polypropylene PolyformaldehydeAS Resin
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