Process for disperse dyeing dry-spun atactic polyvinyl chloride-based filaments and fibres after drawing the wet tow
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United States of America Patent
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-
Jul 21, 1987
Grant Date -
N/A
app pub date -
Mar 25, 1986
filing date -
Mar 26, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a process for continuous dyeing of filaments based on atactic polyvinyl chloride in the course of production. It comprises, in succession, the phases of drawing, impregnation of the filaments by padding while, at the time of the impregnation, the filaments have a density of between 1.3 and 1.4 g/cm.sup.3 (the filament roving having a water content of 10 to 30% by weight), of stabilization under tension in the presence of steam under pressure at a temperature between 100.degree. and 130.degree. C. for 2 to 20 seconds, and then oiling and shrinking in a known manner. Dyeing carried out in this manner is quick and makes it possible to produce colors having good fastness.
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