Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2000-06-16
2001-07-03
Edwards, N (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S362000, C428S365000, C428S377000
Reexamination Certificate
active
06254988
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a composition useful for cut resistant and abrasion resistant sheath/core yarns that, when fabricated into protective garments, are effective and, also, comfortable to the wearer.
2. Description of Related Art
United States Pat. No. 4,470,251 granted Sep. 11, 1984 on the application of W. H. Bettcher discloses sheath/core yarns used in protective garments wherein the core is steel wire and p-aramid fibers and the sheath is wound on the core as at least one layer including an outer layer of nylon to provide a comfortable surface.
United States Pat. No. 4,777,789 granted Oct. 18, 1988 on the application of N. H. Kolmes et al. discloses sheath/core yarns for use in protective apparel wherein at lest one layer of the sheath construction includes a wire wrapping. The yarns can, also, include cotton and synthetic fibers such as nylon and aramid.
BRIEF SUMMARY OF THE INVENTION
A fiber composition is disclosed comprising; 5 to 60 weight percent cotton fibers; 10 to 65 weight percent nylon fibers having a length of 2.5 to 15 centimeters and a linear density of 0.5 to 7 dtex; and 30 to 85 weight percent p-aramid fibers having a length of 2.5 to 15 millimeters and a linear density of 0.5 to 7 dtex, wherein the weight percents are based on the total weight of the cotton, nylon, and p-aramid fibers and the cotton, nylon, and p-aramid fibers are combined to yield a substantially uniform mixture. The fiber composition of this invention is used, among other uses, as the sheath component of a sheath/core yarn construction wherein the core is a fibrous material having an overall linear density of 100 to 5000 dtex. The resulting sheath/core yarns are used, among other uses, to make knitted fabric for protective garments with a combination of high cut resistance, high abrasion resistance, and a high degree of comfort for wearers of the garments.
REFERENCES:
patent: 4470251 (1984-09-01), Bettcher
patent: 4777789 (1988-10-01), Kolmes et al.
patent: 5119512 (1992-06-01), Dunbar et al.
patent: 5442815 (1995-08-01), Cordova et al.
Baron Michael R.
Prickett Larry John
Zhu Reiyao
E. I. Du Pont de Nemours and Company
Edwards N
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