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US 2003/0199215 A1Published application
Ballistic fabric laminates
AssigneeHoneywell International Inc.
InventorsAshok Bhatnagar, Chok Bin C Tan
Life of this patent
Estimating the term…
Abstract
Woven fabric laminates having superior resistance to penetration by ballistic projectiles, assemblies thereof, and the method by which they are made. In one embodiment, among others, a laminate of the invention is comprised of a fabric woven from a high strength, high modulus yarn, a surface coating of a low modulus elastomer and a plastic film bonded to its elastomer-coated surface.
Claims27
A ballistically resistant laminate comprising:
- a. a woven fabric comprised of at least 50% by weight of high strength yarns having tenacities equal to or greater than about 7 g/d, initial tensile moduli equal to or greater than about 150 g/d and energies-to-break equal to or greater than about 8 J/g as measured by ASTM D2256;
- b. an elastomer coated on at least a portion of one surface of said woven fabric, said elastomer having an initial tensile modulus equal to or less than about 6000 psi (41.4 MPa) as measured by ASTM D638;
- and
- c. a plastic film bonded to at least a portion of said elastomer-coated surface.
1 more element
A ballistically resistant laminate comprising:
- a) a scoured and corona-treated woven fabric comprised of at least 50% by weight of high strength yarns having tenacities equal to or greater than about 22 g/d, initial tensile moduli equal to or greater than about 400 g/d and energies-to-break equal to or greater than about 22 J/g as measured by ASTM D2256;
- b) an elastomer having a initial tensile modulus less than about 1200 psi (8.23 MPa) as measured by ASTM D638 coated on at least a portion of one surface of said woven fabric, said elastomer comprising about 1 to 10 percent of the weight of the laminate;
- and
- c) a plastic film bonded to said elastomer coated surface, said plastic film comprising about 0.5 to about 5 percent of the weight of the laminate.
1 more element
A ballistically resistant laminate comprising:
- a) a scoured and corona-treated woven fabric comprised of at least 50% by weight of high strength polyethylene yarn having a tenacity equal to or greater than about 22 g/d, initial tensile modulus equal to or greater than about 400 g/d and energy-to-break equal to or greater than about 22 J/g as measured by ASTM D2256;
- b) an elastomer comprising a block copolymer of a conjugated diene and a vinyl aromatic copolymer having an initial tensile modulus less than about 1200 psi (8.23 MPa) as measured by ASTM D638 coated on at least a portion of one surface of said woven fabric, said elastomer comprising about 1 to 10 percent of the weight of the laminate;
- and
- c) a polyethylene film bonded to said elastomer coated surface, said polyethylene film comprising about 0.5 to about 5 percent of the weight of the laminate.
1 more element
A ballistically resistant laminate comprising:
- a. a scoured and corona-treated woven fabric comprised of at least a majority portion of yarns having a tenacity equal to or greater than about 7 g/d, an initial tensile modulus of at least about 150 g/d, an energy-to-break of at least about 8 J/g as measured by ASTM 2256;
- impregnated with
- b. a matrix resin having an initial tensile modulus, when cured, equal to or greater than about 300,000 psi (2.07 GPa) as measured by ASTM D638;
- and
- c. plastic film bonded to at least a portion of at least one of said fabric surfaces.
2 more elements
A method of producing a ballistically resistant laminate comprising the steps:
- a) forming a woven fabric comprised of at least a majority portion of yarns having a tenacity equal to or greater than about 7 g/d, an initial tensile modulus of at least about 150 g/d, an energy-to-break of at least about 8 J/g as measured by ASTM D2256;
- b) coating an elastomer having an initial tensile modulus less than about 6000 psi (41.4 MPa) as measured by ASTM D638 on at least a portion of one surface of said fabric;
- c) and adhering a plastic film to said elastomer-coated surface.
A method of producing a ballistically resistant laminate comprising the steps:
- a) forming a woven fabric comprised of at least a majority portion of yarns having a tenacity equal to or greater than about 7 g/d, tensile modulus of at least about 150 g/d, an energy-to-break of at least about 8 J/g;
- b) scouring and corona-treating said woven fabric;
- c) impregnating said fabric with a resin having a tensile modulus, when cured, equal to or greater than 300,000 psi (2.07 GPa) and
- d) bonding a plastic film to at least a portion of one of said fabric surfaces.
1 more element
Dependencies are inferred from the claim text.