KR830004972A - 5-layer packaging film and manufacturing method thereof - Google Patents

Abstract

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Description

5-layer packaging film and manufacturing method thereof

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Claims (2)

An outer layer comprising a saponified copolymer of vinylacetate having a thickness of 10 to 40 microns and containing 25 to 75 mole% of ethylene units having ethylene and a degree of sulfonation of at least 90%; 95 to 99.99% by weight resin and 0.01 to 5% by weight selected from the group consisting of copolymers of α-olefins, copolymers of α-olefins and vinyl acetate, and their copolymerized copolymers having a thickness of 0.1 to 10 microns An adhesive layer comprising a graft copolymer containing an unsubstituted carboxylic acid or an anhydride unit thereof; A deep layer comprising a polymer selected from the group consisting of copolymers of ethylene and vinyl acetate containing from 85 to 95% by weight of ethylene units, 15 to 80 microns thick, polyethylene and polypropylene; And an outer layer, an adhesive layer, a deep layer, the adhesive layer, and an inner layer in a thin layer arrangement of an inner layer having a thickness of 40 to 120 microns and an ionomer containing a metal content and a copolymer of α-olefin and acrylic acid or methacrylic acid. It consists of a 5-layer film, and the 5-layer packaging film has a thickness of 75 to 200 microns and the absolute elasticity of the 5-layer packaging film is 0.5% elongation and 2 to 2 widths of the 5-layer packaging film at a temperature of 50 to 150 ° C. 5 kg packaging film, characterized in that 6kg / ㎝. Four kinds of resins are extruded with four extruders, each extruded resin is arranged into a tubular 5-layer film, treated with a co-extrusion circular die, and the 5-layer film of this tubular phenomenon is expanded. Sulfonated copolymers of vinyl acetate containing 10 to 10 microns thick and 25 to 75 mole percent ethylene units having a degree of saponification of 90% or more, characterized by cutting a 5-layer film of expanded tubular Outer layer comprising a; 95-99.99% by weight of resins and unsubstituted carboxylic acids, selected from the group consisting of polymers of α-olefins, copolymers of α-olefins and vinyl acetate, and their copolymerized copolymers, having a thickness of 0.1 to 10 microns An adhesive layer comprising a graft copolymer containing 0.01 to 5% by weight of anhydride units of; A deep layer comprising a polymer selected from the group consisting of polyethylene, polypropylene, copolymers of ethylene and vinyl acetate containing 15 to 80 microns in thickness and containing 85 to 95 weight percent ethylene units; And a 5-layer packaging film of an outer layer, an adhesive layer, a deep layer, the adhesive layer, and an inner layer, in the order of a thin layer of an inner layer having a thickness of 40 to 120 microns and an ionomer containing a metal content and a polymer of α-olefin and acrylic acid or methacrylic acid. The 5-layer packaging film has a total thickness of 75 to 200 microns and an absolute elasticity of 5 to 5 kg with a width of 2 to 6 kg / cm of the 5-layer packaging film at a temperature of 0.5% elongation and 50 to 150 ° C. Manufacturing method of packaging film. ※ Note: The disclosure is based on the initial application.