| abstract |
The invention discloses a BOPP film for heat-seal cigarettes, which is prepared by directly co-extruding a surface layer structure, a core layer structure and an inner layer structure; the surface layer is prepared from the following raw materials in parts by weight: 38-45 parts of random copolymer polypropylene, 20-26 parts of propylene-ethylene copolymer, 25-32 parts of ethylene-methyl acrylate copolymer, 7.5-9 parts of modified crystal tourmaline powder, 1.5-2 parts of 1, 6-hexanediol diglycidyl ether, 4.6-5.2 parts of a mixture of trimethylsiloxy amino-terminated polydimethylsiloxane and hydroxyl-terminated methyl-3, 3, 3-trifluoropropylpolysiloxane, and 3-4.5 parts of polytetrafluoroethylene modified polyethylene wax powder; the core layer is prepared from the following raw materials in parts by weight: 80-90 parts of homopolymerized polypropylene, 12-17 parts of propylene-ethylene copolymer, 7-9 parts of ethylene-methyl acrylate copolymer and 2-3 parts of nano silicon dioxide. The BOPP film for the heat-seal cigarettes has small static/dynamic friction factor; the antistatic effect is good and lasting; good low-temperature heat sealing performance and excellent comprehensive performance. |