Polyester yarn and method for its manufacture
US5045260A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/84
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The method for producing dimensionally stable, low-shrinkage, chemically modified industrial polyester yarns by melt spinning at speeds of 1000 to 4000 m/min. utilizes a copolymer containing at least 85 percent by weight polyethylene terephthalate units and comonomers. During polyester production to lower the thermal shrinkage one or more conformationally fixed linear difunctional comonomers are added to the polymer melt. These difunctional comonomers have the general formula, X'--R--X, where R is an unsaturated linear alkyl group having from three to ten carbon atoms or a cycloalkyl or aromatic group with 6 or more carbon atoms, and X and X' are, independently, OR' or CPPR", and R'=H or an alkyl group and, independently, R" is also H or an alkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.