Patent ID: 9144931
Filing Date: 2015-09-29
Classification: B29C,B29K,B32B,B41F,Y10T

Abstract:
1. A multifunctional BOPP cigarette packaging film, which is characterized in that: said multifunctional BOPP cigarette packaging film comprises an upper layer, a middle-upper layer, a middle layer, a middle-lower layer and a lower layer, wherein the upper layer is a binary copolymerized polypropylene surface layer, both the middle-upper layer and the middle-lower layer are homopolymerized polypropylene antibacterial agent layers, the middle layer is a homopolymerized polypropylene stiffening agent layer, the lower layer is a binary copolymerized polypropylene bottom surface layer, the middle-lower layer covers the lower layer, the middle layer covers the middle-lower layer, the middle-upper layer covers the middle layer, and the upper layer covers the middle-upper layer; in the multifunctional BOPP cigarette packaging film, the upper layer accounts for 8 to 15 percent of the total mass, the middle-upper layer accounts for 12 to 21 percent of the total mass, the middle layer accounts for 38 to 50 percent of the total mass, the middle-lower layer accounts for 12 to 21 percent of the total mass, and the lower layer accounts for 8 to 15 percent of the total mass; the binary copolymerized polypropylene surface layer and the binary copolymerized polypropylene bottom surface layer respectively comprise the following three components in parts by mass: 7 to 11 parts of binary copolymerized polypropylene, 0.5 to 3.5 parts of thermoplastic elastomer, and 0.5 to 3.5 parts of super-slip/anti-blocking master batch; each homopolymerized polypropylene antibacterial agent layer comprises the following three components in parts by mass: 11 to 14 parts of homopolymerized polypropylene (PP), 0.5 to 3.5 parts of antibacterial master batch, and 0.5 to 3.5 parts of rapid migration antistatic master batch; the homopolymerized polypropylene stiffening agent layer comprises the following three components in parts by mass: 25.5 to 32.5 parts of homopolymerized polypropylene (PP), 0.5 to 4.5 parts of antistatic/slip master batch, and 5 to 20 parts of special stiffening master batch; the fluctuation range of the molecular weight of the homopolymerized polypropylene is less than or equal to +/−0.01, and the content of impurities and gel in the homopolymerized polypropylene is less than or equal to 0.02 percent; and particle diameters in each master batch are less than 1.5 microns.