Ballistic-resistant article

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F - Mech Eng,Light,Heat,Weapons

41

H

18/586, 18/955,

F41H 1/02 (2006.01) B32B 27/32 (2006.01) F41H 5/04 (2006.01)

Patent

CA 1198563

ABSTRACT IMPROVED BALLISTIC-RESISTANT ARTICLE Articles such as vests, helmets and structural elements containing a network of ultrahigh molecular weight, high strength, high modulus polyethylene or polypropylene fibers. The fibers, and especially poly- ethylene fibers of 15, 20, 25, 30 or more g/denier tena- city, and 300, 500, 1000, 1500 or more g/denier tensile modulus impart exceptional ballistic resistance to the articles in spite of the melting points, e.g. 145-151°C for the polyethylene fibers and 168-171°C for the poly- propylene fibers, which are high for these polymers, but substantially lower than the 200°C or more melting point previously thought necessary for good ballistic resis- tance.

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