PA (polyamide) hot melt adhesive, a type of excellent hot melt glue, has high thermal stability and melting points, compared with EVA hotmelts. It has good chemical resistance to many compounds, such as oils, plasticizer and some solvents. Polyamide hot melt adhesive has outstanding adhesion to many substrates, like metal, paper, wood and even plastic surface.

PA (Polyamide) hot melt adhesive, is also known as dimer acid polyamide hot melt adhesive. It is formed by the condensation reaction of dimer acid and polyamine at high temperature. PA hot melt glue has excellent heat resistance, cold resistance, electrical properties, oil resistance, chemical resistance, dielectric properties. It is odorless, colorless and features fast curing. PA hot melt adhesive can bond a variety of metals and non-metal. It also has good compatibility with other resins.

High molecular weight PA hot melt adhesive has good fluidity and high bonding strength. It also has good resistance to dry cleaning and water washing. While, the low molecular weight PA glue has good bonding strength and toughness. Most of their properties are better than EVA hot melt adhesive.

The basic color of PA hotmelts is amber (yellow). However it can also be made black by adding carbon black, white by adding titanium dioxide. And in some unusual cases by adding other pigments to make coloured glue.

Under normal circumstances, the softening point of polyamide hot melt adhesives can range from about 100°C to above 200°C. It can withstand low temperature to minus 40°C, and high temperature up to 200°C. Its specific gravity is usually 0.97.

本文來源于隨裝新材料