PINHOLE-RESISTANT EXTRUSION COMPOSITION, METHOD AND ARTICLE

摘要

This invention relates to a pinhole-free, pinhole-resistant extrusion composition comprising at least one olefin polymer and to a method of making a pinhole-free, pinhole-resistant coated or laminated substrate. The invention uses either a single polymer composition or a polymer blend wherein the composition has a corrected or actual Goettfert melt strength value in the range of from 0.01 to 6.5 centiNewtons to provide a pinhole-free, pinhole-resistant extrusion coating, extrusion lamination, adhesive lamination or in-mold coating or the like. Suitable olefin polymers include high pressure, free-radical initiated ethylene polymers and homogeneously branched ethylene polymers with polymer blends of low density polyethylene and substantially linear ethylene polymers particularly preferred. The coatings, moldings, films or laminations are useful for various substrates including paperboard and can protect against product leakage in such applications as disposable cups for hot beverages.