Polypropylene, abbreviated as PP, is a colorless, odorless, nontoxic and translucent solid substance. Polypropylene (PP) is a kind of thermoplastic synthetic resin with excellent performance, and it is a colorless and translucent thermoplastic lightweight general plastic. Polypropylene has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good wear-resistant processability, and has been widely developed and applied in the fields of machinery, automobiles, electronic appliances, construction, textiles, packaging, agriculture, forestry, fisheries and food industry.
In recent years, with the rapid development of China's packaging, electronics, automobile and other industries, it has greatly promoted the development of China's industry. Moreover, polypropylene material is gradually replacing wood products because of its strong plasticity, and its high strength, toughness and wear resistance are gradually replacing the mechanical functions of metals. In addition, polypropylene has good grafting and compounding functions, and has great application space in concrete, textile, packaging, agriculture, forestry and fishery.
The dose of 8g/kg was given to mice 1 ~ 5 times, and no obvious poisoning symptoms were caused. Rats inhaled polypropylene decomposition products heated to 2 10 ~ 220℃ for 30 times, each time for 2 hours, and symptoms of ocular mucosa and upper respiratory tract irritation appeared. Like polyethylene, it is forbidden to use its recycled products to contain food.