Impact resistant rigid composite and method for manufacture
AssigneeHoneywell International Inc.
InventorsAshok Bhatnagar, Brian Duane Arvidson
Life of this patent
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Abstract
An impact resistant rigid composite has a plurality of fibrous layers, each of which comprise a network of filaments. The fibrous layers are disposed in a matrix, with elastomeric layer(s) therebetween. Prior to curing of the matrix, successive fibrous layers exhibit therebetween a peel resistance of at least about 3 g/cm. The composite has high rigidity combined with superior ballistic properties. When bonded at one or both surfaces to a hard plate selected from the group consisting of metals and ceramics, the composite affords increased protection against armor piercing projectiles.
Claims12
An impact resistant rigid composite, comprising:
- (a) a plurality of fibrous layers, each of said layers comprising a network of filaments having a tenacity equal to or greater than about 7 g/denier, a tensile modulus of at least about 150 g/denier, and an energy-tobreak of at least about 8 J/g, as measured by ASTM D2256, said fibrous layers being in a matrix having a tensile modulus of at least about 1×106 psi (6895 Mpa,) as measured by ASTM 0638;
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- (b) a layer of elastomer disposed between adjacent fibrous layers and having a tensile modulus less than about 6,000 psi (41,300 kPa), as measured by ASTM D638, said elastomer providing a peel resistance of at least about 3 g/cm as determined on uncured fibrous layers with said elastomer therebetween after pressing at 66° C for 5 seconds at 332 psi (2,290 kPa).
An uncured composite comprising:
- (a) a plurality of fibrous layers, each of said layers comprising a network of filaments having a tenacity equal to or greater than about 7 g/denier, a tensile modulus of at least about 150 g/denier, and an energy-to-break of at least about 8 J/g, said fibrous layers being disposed in an uncured thermosetting matrix which, when fully cured, has a tensile modulus of at least about 1×106 psi (6895 MPa), as measured by ASTM D638;
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- (b) a layer of elastomer between the fibrous layers, said elastomer having a tensile modulus less than about 6000 psi (41,300 kPa), as measured by ASTM D638, and providing a peel resistance of at least about 3 g/cm after pressing at 66° C. for 5 seconds at 332 psi (2,290 kPa).
Dependencies are inferred from the claim text.