| 摘要 |
PURPOSE: To improve optical, physical, heat sealing, and printing properties by stretching a film consisting of a specified-polypropylene layer, a copolyester layer, and an adhesive layer. CONSTITUTION: Polypropylene particles of a propylene homopolymer or a copolymer of 2, 4, 5- or 6C alkylene monomer and propylene, particles of polyolefin modified to be polar, and particles of a copolyester which is a polyesterification product of at least three kinds of reaction products selected from at least one kind of glycol and at least one kind of dibasic acid are melted, extruded separately to be laminated, or extruded together to form a laminate film, which is stretched 3-10 times in each direction. In this way, the improvement of optical, physical, heat sealing, and printing properties can be attempted. |
