Waterproofing of polyester fiberfill

Claim 1

A slickened polyester fiberfill batt or a garment or other article filled with slickened polyester fiberfill, wherein the slickened polyester fiberfill is secured to a continuous flexible layer of a waterproof hydrophilic elastomer having a water vapor transmission rate of at least 3500 gm.mil/m2/24hrs, according to ASTM E96-66 (Procedure BW), said hydrophilic elastomer being a copolyetherester elastomer or a mixture of two or more copolyetherester elastomers having a multiplicity of long-chain ester units and short-chain ester units joined head-to-tail through ester linkages, said long-chain ester units being represented by the formula ##STR5## and said short-chain ester units being represented by the formula: ##STR6## where G is a divalent radical remaining after the removal of terminal hydroxyl groups from a poly(alkylene oxide) glycol having an average molecular weight of about 400-3500, and further, the amount of ethylene oxide groups incorporated in the copolyetherester or mixture of two or more copolyetheresters by the poly(alkylene oxide) glycol is from about 25-68 weight percent based upon the total weight of the copolyetherester or mixture of two or more copolyetheresters; R is a divalent radical remaining after removing of carboxyl groups from a dicarboxylic acid having a molecular weight less than 300; D is a divalent radical remaining after removal of hydroxyl groups from a diol having a molecular weight less than about 250; and said hydrophilic copolyetherester or mixture of two or more copolyetheresters has from about 25-80 weight percent short-chain ester units.