Fibers from Polyhexamethylene Terephthalamide

Abstract

On treatment with a variety of swelling agents, polyhexamethylene terephthalamide (nylon 6-T) fibers undergo char acteristic changes in tensile properties, x-ray pattern, and dyeability. Microscopically visible voids are permanentlv removed and the uptake of acid and disperse dyestuffs is increased in that portion of the fiber penetrated by the swotting agent. The molecular rearrangement which occurs during this "relaxation" consists of disorientation and probably in volves a change in the relative positioning of successive hydrogen-bonded sheets. It is suggested that the change in dyeing behavior on relaxation consists in general of an increase in extent of the so-called "overdyeing" resulting from the genera tion of additional "vacancies."

Keywords

Polyhexamethylene terephthalamide fibers 6-T nylon fibers Alizarine Sky Blue BS-CF C.I. Part II No. 62105 Interchemical Blue B C.I. Part II No. 61505 Amacel Rubine Red IX C.I. Part II No. 11215 acid dyes Eastone Red N-GLF C.I. No. Disperse Red 35 disperse dyes dyestuffs. Dyed fibers. Triton X-102(TN)alkyl aryl potyether alcohol surfactant deionized water methylenechloride-dichloroacetic acid s-tetrachloroethane-dichloroacetic acid formic acid sulfuric acid HCl Calgon(TN)sodium hexametaphosphate softener. Concentration pH temperature time. Dye uptake tenacity elongation modulus TE1 shade level dye affinity,fiber penetration voids cracking splitting fibrillation. Relaxation. Swelling infinite dyeing finite dyeing.

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References

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