Preparation process and device for hot melt adhesive film bonded with PP material

Abstract

The invention discloses a preparation process of a hot melt adhesive film for bonding a PP material, which comprises the following steps: mixing terpene resin, rosin ester, calcium stearate, a catalyst, a regulator, a surfactant and a nucleating agent at high temperature, adding sodium hydrogen sulfite to obtain a viscous matrix, then fully stirring and mixing the modified polypropylene, epoxy SBS, metallocene polyolefin, a grafting material, paraffin and an antioxidant for reaction, then performing high-temperature polymerization to obtain a hot melt adhesive raw material, carrying out high-temperature contact gasification operation on the hot melt adhesive raw material, and synchronously coating the hot melt adhesive raw material with a viscous matrix in the high-temperature contact gasification process to obtain a preformed intermediate raw material, spraying the preformed intermediate raw material onto a Teflon mesh belt in a gap spraying manner, cooling and forming to obtain a hotmelt adhesive film, performing separate reaction on a tackifying material and a copolymerization raw material of the hot melt adhesive film, and finally finishing copolymerization mixing of the tackifying material and the copolymerization raw material during high-temperature extrusion, so that a viscous matrix is positioned on the surface of the hot melt adhesive film, and the hot melt adhesive film is obtained. The viscosity with a PP material is effectively improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of hot-melt adhesive film preparation, and in particular to a preparation process and device for a hot-melt adhesive film bonded with PP material. Background technique [0002] Hot-melt adhesive film is a film product that is easy to industrialize by preparing hot-melt adhesive through calendering, casting, blown film, etc. Usually, hot melt adhesive films are prepared from highly saturated polyolefin materials. In order to increase the adhesive performance of hot melt adhesive films, additives that are conducive to adhesion are usually added, and PP materials are difficult-to-adhesive materials. Existing Most of the sticky PP materials are used to physically change the surface of the PP material or use other materials to activate the surface of the PP material. [0003] In the existing hot-melt adhesive film preparation process, the raw materials are mostly used to granulate after...

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a hot melt adhesive film preparation process and device for bonding PP material, which solves the problem that the way of physically changing the stickiness of PP material cannot fundamentally solve the problem of its stickiness, while using other materials Activating the surface of the PP material will affect the properties of the hot melt adhesive film itself, and there will be problems of structural denaturation and difficult processing in the later stage

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