Polyolefins

Polyolefin resins used in adhesives are generally high molecular weight compounds. Their low surface energy and capability to wet almost all polymeric and metallic substrates, makes them a resin of choice to formulate hot melt adhesives. The molecular weight of polyolefin used in the adhesive formulation plays a major role in determining the overall characteristics of the adhesive. Increasing the molecular weight of the polyolefin, increases the heat seal strength, viscosity and the hot tack properties. While decreasing the molecular weight increases the flexibility and low temperature performance of the adhesive. Polyethylene, polypropylene and their derivatives, amorphous polyolefins and chlorinated polyolefins are majorly employed in polyolefin adhesive formulations.