Patent ID: 6071612
Filing Date: 2000-06-06
Classification: C08J,D01F,Y10T

Abstract:
A process for making a melt-spun polyester fibrous product with a zinc sulfide delusterant comprising the steps of:melt-blending a masterbatch composition comprising a fiber-forming polyester selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate, and from about 1 to about 50 percent by weight of zinc sulfide with said fiber-forming polyester to form a melt-blended composition comprising from about 0.1 to about 3 percent by weight zinc sulfide; andmelt-spinning said melt-blended composition into said product,wherein the said product exhibits an increased Hunter Color L parameter as opposed to a corresponding product containing said polyester and TiO.sub.2 as a delusterant.