Preparation method of composite hot melt adhesive net film

Abstract

The invention relates to a preparation method of a composite hot melt adhesive net film. The preparation method comprises the following specific steps of S1, selecting 70-80 parts by weight of polyethylene-vinyl acetate, 8-10 parts by weight of terpene resin, 5-8 parts by weight of paraffin, 2-3 parts by weight of a nucleating agent, 2-3 parts by weight of an antioxidant, 1-2 parts by weight of an inorganic filler, 1-2 parts by weight of a compatibilizer and 1-2 parts by weight of a chain extender; S2, forming a composite hot melt adhesive solution b; S3, a Teflon mesh belt vibrating up and down under the downward impact force of the composite hot melt adhesive solution b and the pressure of an exhaust fan, so that internal molecules of a superfine fiber mesh film layer are homogenized and recombined; and S4, enabling the superfine fiber net film layer formed in the step S3 to be subjected to water mist spraying and drying in a drying oven and then to be wound, and preparing the composite hot melt adhesive net film. The composite hot melt adhesive net film has the following advantages that the elasticity and flatness of the composite hot melt adhesive net film are improved and the bonding strength of the composite hot melt adhesive net film is improved through selection of all the components and high-pressure superfine fiber injection molding of a special hot melt adhesive injection device.

Description

Technical field: [0001] The invention belongs to the field of hot-melt adhesive omentum, and in particular relates to a preparation method of a composite hot-melt adhesive omentum. Background technique: [0002] Hot melt adhesive film is a non-woven polymer thermoplastic adhesive. With the intensification of market competition, various industries need a more efficient composite adhesive to improve production efficiency and product quality. , hot melt adhesive omentum is an innovative product of hot melt adhesive technology. [0003] At present, in the process of preparing hot-melt adhesive film, due to the different properties of the functional groups of each polymer, there is a difference in viscosity between high molecular weights, and the mobility is poor, and there is incompatibility with each other before, so that the prepared hot-melt adhesive The melt adhesive film has the defect of low bonding strength. When the hot melt adhesive molecules are sprayed onto the Teflo...

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Problems solved by technology

[0003] At present, in the process of preparing hot-melt adhesive film, due to the different properties of the functional groups of each polymer, there is a difference in viscosity between high molecular weights, and the mobility is poor, and there is incompatibility with each other before, so that the prepared hot-melt adhesive The melt adhesive film has the defect of low bonding strength. When the hot melt adhesive molecules are sprayed onto the Teflon mesh belt, due to the limitation of the spinneret structure, it is impossible to realize the ultrafine fiberization of the high viscosity hot melt adhesive liquid. Injection molding is only suitable for injection molding of medium and low-viscosity hot melt adhesives, so it brings certain restrictions on the bonding strength of the composite hot melt adhesive film. Poor elasticity and flatness of the rubber omentum

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