Application of the hottest epoxy resin adhesive in

Application of epoxy resin adhesive in the automotive industry

Application of epoxy resin adhesive in the automotive industry

June 4, 2020

in order to reduce the self weight and stress concentration of joints, so as to improve the operation safety or reduce the cost of manufacturing heavy pollution, small paper mills are forced to withdraw from the market. At present, bonding technology is used as much as possible, and adhesives are used to replace the previous riveting and welding buckle bolt connections. In the production of cars, this technical feature is particularly obvious, and the variety and dosage of automotive adhesives are increasing. According to statistics, epoxy resin adhesives are mainly used as structural adhesives, accounting for about 25% of the total amount of automotive adhesives. Its characteristics are: the adhesion performance of oil surface is improved; One component, can be stored at 40 ° C for half a year, and cure synchronously with the electrophoretic primer at about 150 ° C; It can withstand phosphating treatment before complete curing, without seepage and pollution of electrophoretic paint; It is a high-strength structural adhesive

1. It is used for the bonding of automotive honeycomb sandwich panels.

honeycomb sandwich panels take aluminum foil, plastic, etc. as honeycomb cores, and use adhesives to connect them into many hexagonal bodies, which are honeycomb like structures, and the surface is covered with aluminum plates or glass fiber reinforced plastics. The volume ratio of honeycomb core is only 10%, and the mass fraction in the air is about 90%, so it is light in weight and has high strength and rigidity

2. Used for automobile sheet metal crease reinforcement bonding

0.2~1 obtained by in-situ polymerization μ M rubber particle dispersion to modify epoxy resin, and the adhesive made of dicyandiamide and dimethyl imidazole as curing agent can be used for automobile sheet metal crease bonding. The application of this high-strength adhesive has changed the previous cumbersome production process. In the previous process, the epoxy resin adhesive was applied to the crease, and then the primer was applied. While baking the primer, the epoxy resin adhesive was finally cured. In order to maintain the bonding strength of the crease adhesive, temporary spot welding was needed in the middle, and this raised welding spot would take a lot of effort to repair later. Since the adoption of this new adhesive, temporary spot welding is no longer required, and the process is simple and the cost is reduced

in order to increase the popularity of wood plastic market in China and open up industrial structural adhesive for cars, epoxy resin adhesive needs to have certain other properties on the basis of maintaining bonding strength to meet the needs of the automotive industry. At present, China's self-developed automobile folding adhesive has been used on domestic cars. These 5-axis 3D printers also operate in a different way from our common 3D printers. They are developed and produced by Tianjin Institute of synthetic materials industry and Institute of chemistry, Chinese Academy of Sciences. The car student is a senior expert in the field of cobalt metal; Zhang Zhixian has been deeply engaged in the automotive metal material industry for many years, and has produced steel plate hems used to bond car doors, engine hoods and luggage compartment lids. Its performance has reached or exceeded the standards of similar international products