Process for continuous heat-setting and shrinking of synthetic fibers
AssigneeVepa AG
InventorHeinz Fleissner
Life of this patent
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Abstract
A process for the continuous heat-setting and shrinking of synthetic fibers in the form of yarns with a given twist and/or in the form of tows with a forced crimp by means of a heated fluid medium with temperatures between 100.degree. and 220.degree.C, characterized in that the fibers are treated in a two-step continuous process, first at temperatures below 100.degree.C in water or saturated steam temperatures, or slightly superheated steam, respectively, and subsequently with air, superheated steam or a superheated steam-air mixture at high temperature conditions between 150.degree. and 220.degree. C.
Claims14
A process for continuous heat-setting and shrinking of synthetic fibers in the form of yarns with a twist and synthetic fibers in the form of tows with a forced crimp by a heated fluid medium, characterized in that the synthetic fibers in at least one of said forms, in a two-step continuous procedure, are treated initially in a heated fluid medium selected from the group consisting of hot water at temperatures just below 100.degree.C., saturated steam, and slightly superheated steam, and the synthetic fibers are immediately thereafter treated in a second heated fluid medium selected from the group consisting of air, superheated steam, and a superheated steam-air mixture at high temperature conditions between 150.degree.C. and 250.degree.C.
Dependencies are inferred from the claim text.