US4623574A
Expired / Lapsed
US
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Ballistic-resistant composite article
Assignee: Honeywell International Inc
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Filing: 1985-01-14
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Granted: 1986-11-18
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Expires: 2005-01-14
Abstract
Abstract The present invention provides an improved, ballistic-resistant composite article of manufacture which comprises a network of high strength fibers having a tensile modulus of at least about 500 grams/denier and an energy-to-break of at least about 22 Joules/gram. An elastomeric matrix material substantially coats each of the individual fibers, and has a tensile modulus of less than about 6,000 psi, measured at 25 DEG C.
Inventors
- 👤 Gary A. Harpell
- 👤 Sheldon Kavesh
- 👤 Igor Palley
- 👤 Dusan C. Prevorsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:00
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/28; C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08J5/24; C08J5/246; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0471; F41H5/0485; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/0261; B32B2262/0269; C08J2353/00; C08J2353/02; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T442/00; Y10T442/20; Y10T442/2615; Y10T442/2623
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
79 words
A ballistic-resistant composite article of manufacture, comprising: (a) a network of fibers having a tensile modulus of at least about 500 g/denier and an energy-to-break of at least about 22 J/g; and (b) a matrix consisting essentially of an elastomer, which substantially coats each of the individual fibers of said network and has a tensile modulus (measured at 25° C.) of less than about 6,000 psi (41,300 kPa), said composite being capable of absorbing the energy of a projectile.
Claim 2
Dependent Claim
79 words
A ballistic-resistant composite article of manufacture, comprising: (a) a network of fibers having a tensile modulus of at least about 500 g/denier and an energy-to-break of at least about 22 J/g; and (b) a matrix consisting essentially of an elastomer, which substantially coats each of the individual fibers of said network and has a tensile modulus (measured at 25° C.) of less than about 6,000 psi (41,300 kPa), said composite being capable of absorbing the energy of a projectile.
Claim 3
Dependent Claim
28 words
An article as recited in claim 1, wherein said fiber has a tensile modulus of at least about 1000 g/denier and an energy-to-break of at least 50 J/g.
Claim 4
Dependent Claim
29 words
An article as recited in claim 1 wherein said fiber has a tensile modulus of at least about 1300 g/denier and an energy-to-break of at least about 55 J/g.
Claim 5
Dependent Claim
33 words
An article as recited in claim 1 wherein said network of fibers comprises a sheet-like fiber array in which said fibers are arranged substantially parallel to one another along a common fiber direction.
Claim 6
Dependent Claim
16 words
An article as recited in claim 1, wherein said network of fibers comprises a non-woven fabric.
Claim 7
Dependent Claim
16 words
An article as recited in claim 1, wherein said network of fibers comprises a woven fabric.
Claim 8
Dependent Claim
20 words
A composite article as recited in claim 1, wherein the volume fraction of said fibers is at least about 0.5.
Claim 9
Dependent Claim
20 words
A composite article as recited in claim 1, wherein the volume fraction of said fibers is at least about 0.7.
Claim 10
Dependent Claim
20 words
A composite article as recited in claim 1, wherein the volume fraction of said fibers is at least about 0.75.
Claim 11
Dependent Claim
22 words
An article as recited in claim 1, wherein said elastomer matrix has a glass transition temperature of less than about 0° C.
Claim 12
Dependent Claim
22 words
An article as recited in claim 1, wherein said elastomer matrix has a glass transition temperature of less than about -40° C.
Claim 13
Dependent Claim
22 words
An article as recited in claim 1, wherein said elastomer matrix has a glass transition temperature of less than about -50° C.
Claim 14
Dependent Claim
19 words
An article as recited in claim 1, wherein said elastomer has tensile modulus of less than about 5,000 psi.
Claim 15
Dependent Claim
20 words
An article as recited in claim 1, wherein said elastomer has a tensile modulus of less than about 1,000 psi.
Claim 16
Dependent Claim
20 words
An article as recited in claim 1, wherein said elastomer has a tensile modulus of less than about 500 psi.
Claim 17
Dependent Claim
24 words
An article as recited in claim 1, wherein said fibers are high molecular weight fibers having a tenacity of at least about 15 g/denier.
Claim 18
Dependent Claim
25 words
An article as recited in claim 1, wherein said fibers are high molecular weight polypropylene fibers having a tenacity of at least about 8 grams/denier.
Claim 19
Dependent Claim
13 words
An article as recited in claim 1, wherein said fibers are aramid fibers.
Claim 20
Dependent Claim
17 words
An article as recited in claim 1, wherein said fibers are high molecular weight, polyvinyl alcohol fibers.
Claim 21
Dependent Claim
49 words
An article as recited in claim 1, wherein said network of fibers is comprised of a plurality of layers, and each of said layers is comprised of a sheet-like array of said fibers in which said fibers are aligned substantially parallel to one another along a common fiber direction.
Claim 22
Dependent Claim
34 words
An article as recited in claim 19, wherein said fiber layers have an arrangement in which the fiber alignment directions in selected layers are rotated with respect to the alignment direction of another layer.
Claim 23
Dependent Claim
21 words
An article as recited in claim 19, wherein said layers are consolidated together with a binder composed of said elastomer matrix.
Claim 24
Dependent Claim
21 words
An article as recited in claim 19, wherein said layers are consolidated together with a binder composed of a non-elastomeric material.
Claim 25
Dependent Claim
33 words
An article as recited in claim 1, wherein a plurality of said coated fibers are grouped together to form a yarn and a plurality of the yarns are arranged to form a fabric.
Claim 26
Dependent Claim
22 words
An article as recited in claim 1, wherein said network of fibers is comprised of dissimilar high modulus fiber shaving different compositions.
Claim 27
Dependent Claim
17 words
An article as recited in claim 1, wherein said elastomer consists essentially of a polystyrene-polyisoprene-polystyrene, tri-block copolymer.
Claim 28
Dependent Claim
17 words
An article as recited in claim 1, wherein said elastomer consists essentially of a polystyrene-polyethylene/butylene-polystyrene tri-block copolymer.
Claim 29
Dependent Claim
16 words
An article as recited in claim 1, wherein said elastomer consists essentially of a cross-linked polyisoprene.
Claim 30
Dependent Claim
20 words
An article as recited in claim 1, wherein said network of fibers is comprised of high molecular weight, polyethylene strips.
Claim 31
Dependent Claim
16 words
An article as recited in claim 27, wherein said strips are woven to form a fabric.
Claim 32
Dependent Claim
25 words
An article as recited in claim 1, wherein said fibers are high molecular weight polyethylene fibers having a tenacity of at least about 15 g/denier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |