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Simply put, pp is engineering plastic, which is the abbreviation of Polypropylene. pp also has a Chinese name, which is called polypropylene. In terms of chemical composition, pp is a crystalline isotactic polymer with very regular molecular chain links. It is also divided into isotactic PP (polypropylene) and random PP. As the name suggests, isotactic pp is a thermoplastic resin with a polypropylene crystallinity of over 95% and a molecular weight between 80,000 and 150,000, while random PP is Polypropylene is a non-crystalline, slightly viscous white wax at room temperature with a low molecular weight.
Could produced by PP injection molded polypropylene machine plastic parts.
http://www.swks-plasticparts.com/
