Process for making high stretch and elastic knitted fabrics from polytrimethylene terephthalate
US6702864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2001 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Feb 17, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/413
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a process of making high stretch elastic knitted fabrics from (PTT) which comprises:(a) making a drawn textured yarn with an elongation to break of 30 to 60 percent by:(i) spinning a polytrimethylene terephthalate polymer into a partially oriented yarn, and(ii) draw texturing the yarn in a false-twisting texturing machine at a draw ratio of 1.05 to 2.0, and a yarn temperature of 50 to 200° C. using a either a contact heater or a non-contact heater, and(b) knitting the yarn into a fabric composed of intermeshing loops of the yarn wherein the stitch length is from 22 cm/100 stitches to 26 cm/100 stitches, and(c) scouring the knitted fabric, and(d) drying the fabric on a belt, and(e) dyeing the knitted fabric at atmospheric pressure by dispersing a dye and the fabric in water and increasing the temperature, and(f) finishing the dyed knitted fabric according to the specific procedure and(g) drying the fabric on a belt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.