Polyamide fibers and fiber blends of enhanced dyeability

Abstract

Abstract A PROCESS FOR INCREASING THE DEEP DYE CHARACTERISTICS OF POLYAMIDES, PARTICULARLY AROMATIC POLYAMIDES WHEN IN COMBINATION WITH KERATINOUS FIBERS AS BLENDS OF NYLON AND WOOL AND THE DYED PRODUCT PRODUCED THEREBY. THE PROCESS INVOLVES PRETREATING THE FIBER IN YARN OR FABRIC FORM WITH A LONG CHAIN ALKYL AROMATIC QUATERNARY AMMONIUM SALT AND SUBSEQUENTLY DYEING THE FIBER WITH AN ACID DYE, THE PRETREATMENT WITH THE QUATERNARY AMMONIUM SALT INCREASES THE AFFINITY FO THE POLYAMIDE FOR ACID DYESTUFFS WITHOUT GREATLY EFFECTING THE DYE AFFINITY OF THE KERATINOUS FIBER, THEREBY PROVIDING GREATLY IMPROVED DYE UNIFORMITY. THE DYE UNIFORMITY IN BLENDS OF BOTH ALIPHATIC AND AROMATIC POLYAMIDES IS INCREASED ACCORDING TO THE PRESENT PROCESS. WHEN THE POLYAMIDE IS AN AROMATIC POLYUAMIDE, IT IS PREFERRED TO USE A CARRIER IN THE DYEBATH TO AID IN THE DYEING OF THE FIBER.

Inventors

• 👤 Francis S Moussalli

Bibliographic Details