Fluorination of polyolefin and polyacrylonitrile fibers
AssigneeAir Products and Chemicals, Inc.
InventorsDale D. Dixon, Larry J. Hayes
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Abstract
The present invention relates to surface modification of synthetic resin fiber form materials, notably polyolefin and polyacrylonitrile fiber form materials whose surface has been modified by treatment with elemental fluorine, and to the fluorination process.
Claims12
An oil stain release moisture transporting fiber form comprising a synthetic resin selected from the group consisting of polyolefins and polyacrylonitriles, said fiber form being surface fluorinated from about [4 .times. 10.sup..sup.-7 to 4 .times. 10.sup..sup.-1 mg F/cm.sup.2 ] 1 .times. 10.sup..sup.-6 to 1 .times. 10.sup..sup.-3 mg F/cm.sup.2 on an after wash basis, said fluorinated fiber form exhibiting a neutralization equivalent of below about [1 .times. 10.sup.6 ] 2 .times. 10.sup.5 and an F/COOH ratio no greater than 25.
A method for surface treating an unfluorinated fiber form comprising a synthetic resin selected from the group consisting of polyacrylonitriles and polyolefins which consists essentially of contacting the fiber form for less than 15 minutes with a fluorine containing gas having from about 0.2-1% by volume of elemental oxygen, and from about 0.5-5% by volume of elemental fluorine to a combined fluorine level in said fiber form of from 1 .times. 10.sup..sup.-6 to 1 .times. 10.sup..sup.-3 mg F/cm.sup.2 on an after wash basis.
Dependencies are inferred from the claim text.