Disperse dyeing of polyvinyl chloride-acetelized polyvinyl alcohol fibers
AssigneeSandoz Ltd.
InventorBernhard Schlick
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Abstract
A process for dyeing without shrinkage with a disperse dyestuff or an optical brightening agent a fibrous substrate whose fibres comprise a mixture of polyvinyl chloride and acetalized polyvinyl alcohol, in which the substrate is dyed at a temperature from 60.degree. to 90.degree. C. in the presence of a levelling carrier, this levelling carrier being removable when the dried substrate is subsequently submitted to a dry heat treatment for a period up to 120 seconds and at a temperature from 95.degree. to 135.degree. C.
Claims18
A process for dyeing with a disperse dyestuff a fibrous substrate whose fibres comprise a mixture of polyvinyl chloride and acetalized polyvinyl alcohol, which comprises dyeing the substrate at a temperature from 60.degree. to 90.degree. C. with a dye liquor containing a levelling carrier which is substantially removable from the substrate when the dyed or brightened substrate is subsequently submitted, after drying, to a dry heat treatment for a period of up to 120 seconds and at a temperature from 95.degree. to 135.degree. C.
Dependencies are inferred from the claim text.