Adhesive film for zipper, preparation method of adhesive film, and zipper

The invention relates to the technical field of zippers, in particular to an adhesive film for a zipper, a preparation method of the adhesive film, and the zipper. The adhesive film comprises a matrixfilm layer and an adhesive film layer which are sequentially arranged, wherein the adhesive film layer is formed by coating the two surfaces of gridding cloth with a composite adhesive; and the composite adhesive is prepared from the following raw materials in parts by weight: 20-40 parts of modified polyurethane, 8-12 parts of pentaerythritol ester, 0.1-3.0 parts of antioxidant, 10-15 parts of polyethylene, 1-5 parts of curing agent, 0.1-3.0 parts of catalyst, 10-20 parts of nylon, 1-5 parts of filler and 5-10 parts of EVA. The zipper adhesive film has good high-temperature resistance, tearresistance, torsion resistance, washing resistance and the like, and can effectively solve the problems of whitening, degumming and the like in washing and folding. 本发明涉及拉链技术领域，具体涉及一种拉链用贴胶膜、其制备方法及拉链。所述拉链用贴胶膜包括依次设置的基质膜层和胶膜层，所述胶