6.7.1 Polyolefin (PO) & Ethyl Vinyl Acetate Hotmelts

PO hotmelts are made from polyolefin copolymers. By tuning the crystallinity and molecular weight of polyolefins, products with different open times and bonding strengths can be developed. Ethylene vinyl acetate (EVA) is a class of crystalline polymers with a wide range of melting points. As the weight percentage of vinyl acetate increases, the material shifts from high crystallinity to high amorphous.

Both PO hotmelt and EVA hotmelts are widely used in paper, cardboard, wood and fabric bonding. Compounded versions can be used for non-load-bearing applications up to about 70°C (158°F). EVAs and PO hotmelts represent the highest volume of hot-melt adhesives used, primarily in packaging and wood assembly applications.³¹

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6.7.1 Polyolefin (PO) & Ethyl Vinyl Acetate Hotmelts

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