Which areas can polyurethane adhesives be used in?

Polyurethane adhesive is a medium- and high-grade adhesive, with excellent flexibility, impact resistance, chemical resistance, wear resistance, and most importantly, its low temperature resistance. Because of its advantages in this series, polyurethane adhesives are widely used in the following fields.
1, carpentry industry
With the improvement of people's awareness of environmental protection, the wood processing industry has gradually used a new type of environmentally friendly polyurethane adhesive instead of the formaldehyde-based formaldehyde resin, and strive to reduce environmental pollution . The single-part moisture-cured polyurethane adhesive used in the carpentry industry is liquid and is used at room temperature. Usually it has high bonding strength, flexibility and good water resistance, and can bond with many non-wood substrates (e.g. metal, plastic, rubber, etc.). The dry and wet strength of single-group polyurethane adhesives in the test was better than that of phenolic adhesives. Before bonding, applying hydroxymethyl interphenol (HMR) coupling agents on the surface of the bonding substrate can increase the bonding strength.
, shoe industry
China has been a large shoe-making country, and in recent years, water-based polyurethane preparation process has become increasingly mature. For some low-polar shoes, such as SBS and other materials bonding, polyurethane adhesive peeling strength can not meet the requirements. By adding adhesive resins and other modified, polyurethane shoe adhesives with high crystallization, fast crystallization speed, high cohesion strength and ideal peeling strength can be developed.
3. Packaging industry
soft packaging with its light and convenient, long shelf life, hygiene, easy storage and transportation, easy to open, small amount of waste and shelf effect of good and other unique comprehensive performance, has now exceeded hard packaging, such as plastic, glass bottles and cans. Polyurethane adhesive due to its excellent performance, can be different properties of film materials bonded together for cold, oil resistance, drug resistance, transparency, wear and other properties of soft packaging composite film. At present, in the domestic and foreign markets, polyurethane adhesive has become a soft packaging with composite film processing of the main adhesive.
4. Construction paving industry
Polyurethane adhesives in addition to non-toxic, non-polluting, easy to use and other advantages, but also has other adhesives can not be compared with the advantages, that is, excellent low temperature, solvent resistance, aging resistance, ozone and bacteria resistance, in the application of building paving materials play an important role. Widely used in elastic rubber mats, hard rubber floor tiles and laying plastic runway sports field. The new two-part polyurethane adhesive breaks through the contradiction between the shear strength and peeling strength of traditional adhesives, which can make both achieve high use strength at the same time, show excellent performance in the bonding of steel plates used in construction, bonding is solid and not easy to produce deformation, and room temperature adjustable curing speed, making the polyurethane glue easy to use and widely used.
5, the automotive industry
in the automotive application of the most widely used polyurethane adhesives are mainly assembled windshield with a single component wet cured polyurethane sealant; Automotive interiors are also an area of increased adhesive use. A wide range of water-based polyurethane adhesives used in automobiles are adhesives formed by polyurethane dissolved in or dispersed in water.
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