Process for disperse dyeing dry-spun atactic polyvinyl chloride-based filaments and fibres before drawing
US4681594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Mar 11, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for continuous dyeing of filaments based on atactic polyvinyl chloride in the course of their production. The undrawn filaments are impregnated with a composition containing at least one plastosoluble dye while they have a density of between 1.3 and 1.4 g/cm.sup.3, are fixed continuously in the presence of steam under pressure at a temperature of between 100.degree. and 120.degree. C. for 2 to 20 seconds, are drawn in a known manner, are then fixed under tension in the presence of steam under pressure at a temperature of between 100.degree. and 130.degree. C. for 1 to 20 seconds, and are then oiled and shrunk in a known manner. Such a process permits quick dyeing, on an industrial scale, with good color fastness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.