Patent · US Expired

Polyester staple fibers of filaments with high resistance to pilling

US5858529A · kind A · utility

0Cited by

12References

16Claims

0Family size

Assignee

AKZO NOBEL N.V. · NL

Inventors

Joseph C. W. Spijkers · Haan, DE
Eberhard Ruf · Rodenbach, DE
Diederich Schilo · Klingenberg, DE

Key dates

Filing date	Nov 13, 1997
Grant date	Jan 12, 1999
Priority date	—
Expiry date	Nov 13, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2913
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Polyester staple fibers with high resistance to pilling contain (1) a polyester component consisting of at least 90 mol % polyethylene terephthalate, after its polycondensation, and (2) 1 to 7% by weight, relative to the polyester component, of a polyalkylene glycol block polymer with the formula ##STR1## in which the polyoxypropylene core has a mean molecular weight of 3000 to 4000 and a, b and c are integers such that the polyoxyethylene groups form 20 to 60% by weight of the block polymer, which has a mean molecular weight of 3750 to 10000. The staple fibers are prepared by admixing the polyester component and the block copolymer evenly in a separate phase and spinning the two together in the usual manner. The polyester component preferably is polyethylene terephthalate homopolyester, to which 2-4% by weight of the block copolymer is admixed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.