The role of spot welding and weld sealant


Release time:

2022-01-10 13:38

Spot welding sealant variety is more, according to the performance can be divided into expansion type and non-expansion type two categories, according to the chemical composition can be divided into rubber and resin and both types of composite. Our country's main variety is rubber type, PVC and acrylic vinegar type.

Spot welding sealant variety is more, according to the performance can be divided into expansion type and non-expansion type two categories, according to the chemical composition can be divided into rubber and resin and both types of composite. Our country's main variety is rubber type, PVC and acrylic vinegar type. 

Anti-rock shock damping base adhesive (paint) is mainly used for the bottom of the body, the inside of the plate and the inside of the engine. According to the composition, it can be divided into asphalt type heat insulation tail and synthetic resin water based heat insulation damping adhesive and pvc plastic sol solvent-free stone hammer adhesive. 

The main varieties of shock-proof sealant are pvc resin as the base material of high solid content of dense clamp and chloroprene rubber as the main solvent sealant. 

Automotive interior materials are various, but most of them are non-metallic materials. Therefore, the bonding and sealing of automotive interior are mostly non-structural adhesives, which can not be heated and are often cured at room temperature. There are many kinds of it, mainly roof adhesive, door seal fixed with adhesive. 

Automobile roof roof has polychlorine, vinyl film composite polyurethane foam or fabric composite polyurethane foam soft roof roof, corrugated composite tree ester felt hard roof roof, soft roof roof, used in the past is mainly neoprene adhesive. In the future, it will be gradually replaced by acrylic ester and polyurethane water - based glue. 

The fixing of the door seal strip used to use ambutadiene rubber solvent-based adhesive, and then use hot soluble butyl adhesive. Butyl tape can be used for vehicle caulking and sealing strip fixation. Foamed butyl adhesive tape is widely used abroad. 

Windshield glass bonding sealant mainly includes polysulfide, polyurethane and silicone sealant. In addition to the single-component high-modulus polyurethane adhesive introduced for high-grade cars, two-component polyhydrogen ester sealant and three-component polysulfide sealant are used in China. 

Liquid sealant is mainly used for flat sealing. The main type of liquid sealant in China is silicone rubber. Anaerobic glue is mainly used in mechanical and screw fastening. 

The adhesives of the clutch plate are structural adhesives, which should have high strength and high temperature resistance. At present, this kind of adhesives manufactured in China are mainly phenolic - Damseler adhesives and phenolic - epoxy adhesives, which are generally suitable for the high temperature of about 200 degrees Celsius. Phenolic epoxy adhesive modified by polyphthalimide can withstand temperature above 900 degrees Celsius. 

In addition, there are car filters with adhesive sealant, oil tank with sealant, process with nameplate decoration strip with adhesive and tape, and engine, pump body and other infiltration plugging agent.