Additive-containing fibers
AssigneeM&T Chemicals Inc.
InventorsRoger T. Guthrie, Justin L. Hirshman, Stanley Littman, Edwin L. Sukman, Philip H. Ravenscroft
Life of this patent
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Abstract
Additives can be permanently incorporated into melt spun fibers by cold drawing the fibers under conditions that generate a network of interconnecting microvoids within the fiber. The microvoids are formed in the presence of specified liquid or vapor media which fill the microvoid network. The temperature of the medium is below the effective glass transition temperature of the fibers containing said medium. The additive is either present in said medium or is applied to drawn fibers containing said medium.
Claims10
A melt spun, cold drawn fiber of a synthetic organic polymer selected from the group consisting of polyesters, polyamides, polypropylene and high density polyethylene, said fiber containing from 0.1 to 25%, based on the weight of said fiber, of an additive which at least partially occupies a network of interconnecting microvoids extending along the entire length and throughout the cross section of said fiber, said additive being selected from the group consisting of dye receptors, flame retardants, anti-static agents, stabilizers, mildewcides and antioxidants.
Dependencies are inferred from the claim text.