Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What makes Polyurethane Hot Melt Adhesives stronger than conventional hot melts?

April 26, 2017adhesives conventional hot melt melts polyurethane stronger

0

Posted

What makes Polyurethane Hot Melt Adhesives stronger than conventional hot melts?

1 Answer

0

Posted

Polyurethane hot melts form an initial bond immediately upon cooling, similar to conventional hot melts. However, PUR’s offer a second phase where the adhesive reacts with moisture to form an extremely strong chemical bond known as cross-linking. At this point, the adhesive actually penetrates both the substrate and the adhesive itself to make a “chain”, thus making it much stronger, and more permanent, than traditional hot melt sticks.