Concept:

Pur (polyurethane reactive), full name is moisture curing reactive polyurethane hot melt adhesive, main component is isocyanate terminated polyurethane prepolymer, one component, 100% solid content.

characteristic:

Hot melt pur glue, with adjustable adhesion and toughness (elasticity), has excellent adhesion strength, good high and low temperature resistance, water resistance, wear resistance, No. 0 chemical corrosion resistance and aging resistance. It is applicable to the adhesion of plastics and metals, and widely used in the electronic field, automobile, textile, electromechanical, aerospace and other national economic fields.

Polyurethane hot melt adhesive type:

Pur hot-melt adhesive (one component moisture curing polyurethane adhesive) is one of the types of polyurethane hot-melt adhesive.

Difference between hot melt pur glue and EVA hot melt glue:

1. Different components, PUR belongs to polyurethane, EVA uses ethylene vinyl acetate;

2. The reaction mechanism is different, PUR is cured by moisture and irreversible after reaction; EVA belongs to physical bonding, which is cooled and solidified, remelted after heating and reversible after operation.

3. Pur is irreversible after curing, with higher strength and high and low temperature resistance. It is heat-resistant, cold resistant, water vapor resistant, chemical resistant and solvent resistant. The rigidity of EVA hot melt adhesive is relatively poor, and its softening point is relatively low compared with pur polyester, most of which is around 100 ℃, which limits its application range.