Method of high speed yarn texturing
US4157604A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1977 |
| Grant date | Jun 12, 1979 |
| Priority date | — |
| Expiry date | Nov 18, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/122
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Multifilament thermoplastic synthetic yarn is textured by an improved process involving propelling the yarn through an energy tube by superheated steam to strike, at an oblique angle, an unyielding barrier within a chamber in which the yarn then forms a plug on a moving perforate surface. The improvement comprises heat-setting the yarn, before the texturing operation, at constant length to the point that its density increases to at least 50% of the difference between that of undrawn amorphous yarn and the maximum normally attainable in such yarn; and feeding the resulting yarn hot into the energy tube whereby tendency toward shrinkage of the yarn resulting from undergoing crimping is reduced, and/or a higher texture level is obtainable at given temperature of the crimping operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.