POLYPROPYLENE FILM AND POLYPROPYLENE COMPOSITE FILM

The present disclosure provides a polypropylene membrane, which is formed by subjecting the following ingredients to radiation modification, the ingredients comprising: 20-50 parts by weight of polypropylene; 20-45 parts by weight of polyolefin elastomer; 30-60 parts by weight of polyethylene; 0-10 parts by weight of ethylene-vinyl acetate copolymer; 0.5-10 parts by weight of cross-linking agent; and 0-1 parts by weight of silicon dioxide. Comparing with the conventional art, the vacuum forming temperature of the polypropylene membrane is decreased by adjusting the amounts of main ingredients (polypropylene, polyolefin elastomer and polyethylene) in the present disclosure. At the same time, after the radiation modification, the molecular chains of the polymers crosslink and twist with each other, and the melt strength of the polypropylene membrane is increased, making the molecular chains hard to move during the high-temperature vacuum forming, thereby making the product obtained by vacuum forming not easy to rupture and the surface details of the products not easy to become shallow or even disappear.