Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1985-12-09
1988-04-12
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
2 25, 428113, 428225, 428229, 428246, 428247, 428263, 428265, 428297, 428298, 428302, 428911, B32B 700
Patent
active
047374012
ABSTRACT:
The present invention provides an improved article of manufacture which comprises at least one network of high strength, extended chain fiber or yarn selected from the group consisting of extended chain polyethylene (ECPE) extended chain polypropylene (ECPP) fibers, extended chain polyvinyl alcohol (PVA) fiber and extended chain polyacrylonitrile (PAN) fiber. The fibers and yarn have a denier of not more than about 500 and a tensile modulus of at least about 200 g/denier. The fibers and yarn preferably have a tensile modulus of at least about 500 grams/denier and an energy-to-break of at least about 22 Joules/gram. Optionally, a low modulus elastomeric material, which has a tensile modulus of less than about 6,000 psi, measured at about 23.degree. C., substantially coats the fiber and yarn of the network.
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patent: 4501856 (1985-02-01), Harpell et al.
R. C. Laible et al., "The Application of High Modulus Fibers to Ballistic Protection".
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J. Macromel Sci. Chem. A7(1), pp. 295-322 (1973).
R. C. Laible, "Fibrous Armor", Ballistic Materials and Penetration Mechanics, Elsevier Scientific Publishing Co., 1980.
J. W. S. Hearle et al., "Ballistic Impact Resistance of Multi-Layer Textile Fabrics," NTIS Acquisition No. AD A127641, (1981).
Weiner et al., "Materials Evaluation Report No. 2781," U.S. Army Natick R&D Command, Ma. (1950).
Figuica, "Energy Absorption of Kevlar Fabrics Under Ballistic Impact", NTIS Acquisition No. AD A090390, (1980).
Harpell Gary A.
Kavesh Sheldon
Palley Igor
Prevorsek Dusan C.
Allied Corporation
Bell James J.
Fuchs Gerhard
Negin Richard A.
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