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US 4,536,526 AGranted
Method of manufacturing polyester fibers with good adhesion to rubber
AssigneeUnitika Ltd.
InventorShigemitsu Murase
Life of this patent
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Abstract
This invention is a method of manufacturing polyester fibers with good adhesion to rubber, characterized in that in the process of spinning polyester fibers, a spinning oil (finish composition) containing an ester of a thiodicarboxylic acid as the principal lubricating agent ingredient and an epoxy compound is added to the polyester fiber which is then heat treated.
Claims16
A finish composition for polyester fiber to improve adhesion to rubber comprising
- (a) about 20 to 70 weight percent of a lubricant which comprises at least 80 weight percent of an ester of thiodicarboxylic acid,
- (b) about 5 to 40 weight percent of an epoxy compound, and
- (c) about 10 to 50 weight percent of a surfactant.
A method for producing polyester fiber with improved adhesion to rubber comprising
- (i) applying to the fiber a finish composition comprising
- (a) about 20 to 70 weight percent of a lubricant which comprises at least 80 weight percent of an ester of thiodicarboxylic acid,
- (b) about 5 to 40 weight percent of an epoxy compound, and
- (c) about 10 to 50 weight percent of a surfactant, and
- (ii) heating the fiber at a temperature of about 150-250.degree. C. for up to several seconds.
2 more elements
Dependencies are inferred from the claim text.