A kind of steel plate coating glue that can be laminated at low temperature and its preparation method and hot melt adhesive film

Abstract

The invention discloses a low-temperature laminated steel plate coating glue, which comprises the following raw material components in terms of mass parts: 20-40 parts of high-molecular saturated polyester resin, 5-10 parts of medium-molecular saturated polyester resin, 2-5 parts of hydroxyl-terminated liquid nitrile rubber, 5-10 parts of blocked isocyanate curing agent, 0.5-1 part of catalyst and 50-60 parts of solvent, which can be laminated at a low temperature of 160 ° C and have good resistance Heat, to overcome the deficiencies in the prior art. The present invention further proposes a preparation method of the above-mentioned steel plate coating adhesive, which can effectively reduce the loss of heat resistance of the hot melt adhesive in the preparation process, and also proposes a hot melt adhesive film using the above steel plate coating adhesive, which can effectively Avoid delamination of hot melt adhesive film and steel plate.

Description

technical field [0001] The invention relates to the field of steel plate coating adhesives, in particular to a steel plate coating adhesive that can be laminated at low temperature, a preparation method thereof, and a hot-melt adhesive film. Background technique [0002] Coated steel sheets are widely used in industry and life, such as automobiles, refrigerators, washing machines, high-end furniture, kitchen equipment, etc. The traditional coated steel plate is coated with a layer of solvent-based adhesive on the steel plate, baked at high temperature and then laminated with hot melt adhesive film. In the coated steel plate industry, high temperature lamination generally refers to the Baking is carried out at a temperature of 300°C. There are two problems in this kind of high-temperature lamination production process. The solvent volatilization is not environmentally friendly and the energy consumption is high. Secondly, the bonding of the hot melt adhesive to the surface o...

AI Technical Summary

Problems solved by technology

There are two problems in this kind of high-temperature lamination production process. The solvent volatilization is not environmentally friendly and the energy consumption is high. Secondly, the bonding of the hot melt adhesive to the surface of the lamination substrate is thermoplastic bonding. , prone to the risk of delamination between the composite substrate and the steel plate

[0003] In the prior art, the polymer hot-melt adhesive film is generally used to replace the high-temperature baking method to produce the composite steel plate in the traditional technology. However, since the main component of the polymer hot-melt adhesive film is polyethylene, the melting point and surface hardness are low. , there are crystal points in the process of extrusion production, which seriously affects the appearance quality of the coated steel plate. Secondly, the salt spray resistance of the composite steel plate with polymer hot melt adhesive film is poor. The modified hot melt adhesive is corrosive to the steel plate, and the composite steel plate is prone to delamination after long-term use and aging

Images