POLYURETHANE HOT MELT ADHESIVE LAMINATION

This lamination uses a polyurethane adhesive applied to one surface with a hot roller in order to bond it to another.  The adhesive can be applied as either a continuous layer or in a dot pattern. Hot melt lamination is useful for binding the same material or two different types.

The primary polymers used in hot melts are ethylene-vinyl acetate (EVA), polyolefins, polyamides and polyesters, styrene block copolymers, polyethylene, and ethylene-methyl acrylate (EMA) or ethylene n-butyl acrylate (EnBA).

Polyurethane Hot Melt is more commonly known as PUR Hot Melt. It is an adhesive, which is heated and distributed from a cartridge or slug, unlike the conventional hot melt that is in a pellet or stick form. PUR Hot Melt is distinctive because it hardens through moisture in the air, to form a super strong bond that cannot re-melt.

Polyurethan Hot Melt provides a stronger bond, than conventional hot melts. This is due to the PUR Hot Melt forming a strong intimal bond, which continues to strengthen because of how the adhesive reacts with moisture in the air.

This chemical process is also known as cross-linking. This means the PUR Hot Melt attaches to the object being glued and itself to form a stronger, permanent bond.

Hot melts are applied to a material in the liquid (molten) state. The time between applying the adhesive and then bringing the second material in contact is called open time. When the second material is brought into contact, the adhesive cools down and solidifies very quickly.

Hot melt adhesive film, produced by HMT Manufacturing, is similar to the material used in glue guns but arrives in the form of a fabric.