Polypropylene is obtained by catalytic polymerization of propylene using a Ziegler-Natta catalyst, which is a crystalline isotactic polymer in which molecular chain links are well aligned. Polypropylene English name Polypropylene, referred to as PP (hereinafter referred to as PP), commonly known as 100% plastic. Polypropylene can be divided into isotactic polypropylene and random according to its crystallinity. Isotactic polypropylene is a highly crystalline thermoplastic resin with crystallinity of over 95% and molecular weight between 8 and 150,000. The following polypropylene is mainly introduced. For isotactic polypropylene. The random polypropylene is a non-crystalline, slightly viscous white wax at room temperature, with low molecular weight (3000~10000), irregular structure and lack of cohesion, and less application.
Polypropylene can be modified by filling, reinforcing, blending, copolymerizing, and crosslinking. Adding fillers such as calcium carbonate, talc, inorganic minerals, etc., can improve rigidity, hardness, heat resistance and dimensional stability; adding glass fiber, asbestos fiber, mica, glass beads, etc. can improve tensile strength and improve Creep resistance, low temperature impact resistance; addition of elastomers and rubber can improve impact properties, transparency and so on.
Tencel Woven Fabric,Tencel Woven Plain Fabric,Tencel Resilient Fabric,160Gsm Dark Color Fabric
Shaoxing Weihui International Trade Co.,Ltd. , https://www.weihui-fabric.com