1. Polypropylene is a thermoplastic resin made by polymerization of propylene According to the methyl arrangement position, it can be divided into isotactic polypropylene, random polypropylene and syndiotactic polypropylene It is non-toxic, tasteless, low density, strength, stiffness, hardness and heat resistance are better than low-pressure polyethylene, and can be used at about 100 ℃ It has good electrical properties, high frequency insulation and is not affected by humidity, but becomes brittle at low temperature, not wear-resistant and easy to aging Suitable for making general mechanical parts, corrosion resistant parts and insulating parts Common organic solvents such as acid and alkali have little effect on it.
2. Polypropylene is the most widely used general plastic. It can be used as plastic or spun into fiber (polypropylene fiber). Polypropylene fiber is a fiber with low water absorption and high corrosion resistance. It can be used in clothing and furniture, especially suitable for weaving rope. It can also be extruded or blown into a film, and then drawn and cut into flat wires, woven bags, or used as binding materials and packing belts. In recent years, polypropylene composite film has developed rapidly, which can prevent moisture, gas and cooking, and can be used as soft packaging of food and beverage.
