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Hot-melt adhesive sheet and production process thereof
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A hot-melt film and production process technology, which can be used in heat-activated films/sheets, adhesives, films/sheets without carriers, etc., and can solve the problems of poor elasticity of hot-melt adhesives, inability to meet the comfort and aesthetics of shoes, and affecting the wearing of shoes.
Active Publication Date: 2019-12-20
温州力盛新材料有限公司
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[0004] However, the hot-melt adhesive in the prior art has poor elasticity. When the toe cap or the heel is deformed, it cannot be automatically restored, and it is easy to cause wrinkles in the shoes, which affects the wearing of the shoes. It cannot meet the needs of the comfort and aesthetics of the shoes. Improve
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Embodiment 1
[0036] A production process of a hot-melt adhesive film, comprising the following steps:
[0037] S1. Pretreatment: Weigh the required components, add acrylic acid ethylene rubber copolymer to ethylene-vinyl acetate copolymer rubber, and use a high-speed mixer to pre-mix evenly for later use;
[0038] S2, dehumidification; transfer the material in S1 to the drying cylinder for dehumidification, the temperature is 45°C;
[0039] S3, granulation; adding the materials in S2 into a screw extrusion granulator, setting the temperature at 145°C, melt blending and extruding, the extruded mixture is cooled and granulated to obtain the primary product;
[0040] S4, extruding slices; mixing the initial product in S3 with thermoplastic polyurethane elastomer rubber and stirring evenly, then adding a certain amount of acrylic acid ethylene rubber copolymer, and transferring the material to the screw extrusion granulator after stirring evenly, The temperature is 145°C, melt blending and ex...
Embodiment 2
[0044] A production process of a hot-melt adhesive film, comprising the following steps:
[0045] S1. Pretreatment: Weigh the required components, add acrylic acid ethylene rubber copolymer to ethylene-vinyl acetate copolymer rubber, and use a high-speed mixer to pre-mix evenly for later use;
[0046] S2, dehumidification; transfer the material in S1 to the drying cylinder for dehumidification, the temperature is 55°C;
[0047] S3, granulation; adding the material in S2 into a screw extrusion granulator, setting the temperature at 165°C, melt blending and extruding, the extruded mixture is cooled and granulated to obtain the primary product;
[0048] S4, extruding slices; mixing the initial product in S3 with thermoplastic polyurethane elastomer rubber and stirring evenly, then adding a certain amount of acrylic acid ethylene rubber copolymer, and transferring the material to the screw extrusion granulator after stirring evenly, The temperature is 165°C, melt blending and ext...
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technical field [0001] The invention relates to the technical field of hot-melt adhesive preparation, in particular to a hot-melt adhesive sheet and a production process thereof. Background technique [0002] Hot-melt adhesive is a kind of plastic adhesive, which is in a solid state at room temperature, and can be quickly bonded after heating and melting; the basic resin of hot-melt adhesive is the copolymerization of ethylene and vinyl acetate under high temperature and high pressure, that is, EVA resin. This kind of resin is the main component of hot melt adhesive. The proportion and quality of the basic resin determine the basic properties of the hot melt adhesive, such as the bonding ability, melting temperature and bonding strength of the glue. Generally, the VA content is 18-33. Index (MI) 6-800, low VA content, the higher the crystallinity, the greater the hardness. Under the same circumstances, the larger the VA content, the lower the crystallinity and the increased ...
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