What is polyurethane adhesive

Polyurethane adhesives are adhesives with molecular chains containing amine carbamate groups (-NHCOO-) or isocyanate groups (-NCO). They are an important type of synthetic adhesives. Their core advantages lie in their wide range of adhesion, strong and durable properties, excellent low-temperature resistance, suitability for both porous and smooth materials, and the ability to achieve high-strength bonding of dissimilar materials. 

 

It combines high bonding strength with good flexibility. The adhesive layer can form a soft-hard transition layer, providing impact resistance, buffering and vibration reduction. It is suitable for different substrates with different thermal expansion coefficients. It has outstanding low-temperature resistance, maintaining stable bonding strength even in ultra-low temperature environments. According to its form, it includes single-component, two-component, water-based, and hot-melt types. The single-component type is easy to operate with moisture curing, while the two-component type has better strength and durability. The water-based type has low VOC content, is environmentally friendly and safe. 

 

It is widely used in fields such as automobiles, construction, packaging, footwear manufacturing, and furniture production, including automotive windshield sealing, composite film bonding, wood environmental-friendly bonding, and shoe material compounding, etc. It is an indispensable bonding material in modern industry.