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Pur hot melt adhesive moisture curing principle pur adhesive

by:Sinograce Chemical     2021-03-21
PUR reactive hot melt adhesive, it is through the reaction of moisture curing, also can saying is the water molecules through chemical reactions into a solid, chemical reaction, reaction time, can according to the factors and the contact area and so on in the air. Specifically, PUR hot melt adhesive moisture curing principle is as follows: PUR hot melt adhesive, the adhesive heating molten fluid, coated in glued base material surface, the two glued laminating, colloid at the beginning of cooling rapidly generating viscous force positioning effects ( Physical curing) ; The colloid and the moisture in the air or glued trace moisture of base material continues to function, chemical crosslinking reaction, chain extender ( Chemical curing) 。 After the crosslinking reaction polymer with high cohesion, once cured, then show special waterproof, high resistance to chemical corrosion resistance and weatherability.
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