Classification Of Polyamide Hot Melt Adhesives

Polyamide hot melt adhesives can be divided into two main categories based on their synthetic raw materials. One type is produced through the polycondensation reaction of dibasic acids and diamines, while the other is synthesized through the polycondensation of α-amino acids or the ring-opening polymerization of caprolactam. These hot melt adhesives not only exhibit excellent bonding properties but also good oil and chemical resistance, making them highly effective in a variety of applications. Polyamide hot melt adhesives can be further divided into three categories: first, dimer acid hot melt adhesives, which are produced through the polycondensation reaction of dimer acid with diamines or polyamines; second, nylon hot melt adhesives, which primarily include copolymers of PA6, PA66, PA12, PA1012, and PA1010; and finally, binary or ternary copolymers formed from aromatic dibasic acids and aliphatic diamines, or vice versa.