Improvements relating to fibers.

摘要

Polyester fiberfill is provided with a slickener coating of an improved copolyester, the improvements being that the copolyester is modified so as to contain polar groups that provide sites that are susceptible to a cross-linking-type reaction, and the resulting materials that have been subjected to such cross-linking-type reaction, whereby the durability of the coating on the fiberfill is improved in comparison with like but unmodified copolymers, and wherein other advantages are obtained.