US4748064A
Expired / Lapsed
US
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Ballistic-resistant composite article
Assignee: Honeywell International Inc
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Filing: 1985-12-09
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Granted: 1988-05-31
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Expires: 2005-12-09
Abstract
Abstract The present invention provides an improved, composite article of manufacture which comprises a network of 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 having a tensile modulus of less than about 6,000 psi, measured at 25° C.
Inventors
- 👤 Gary A. Harpell
- 👤 Igor Palley
- 👤 Sheldon Kavesh
- 👤 Dusan C. Prevorsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:10
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/28; C; C08; C08J; C08J5/00; C08J5/04; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0471; F41H5/0485; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/24132; Y10T442/00; Y10T442/30; Y10T442/3033; Y10T442/3041; Y10T442/60; Y10T442/643
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
53 words
A composite article of manufacture comprising 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 in a matrix of an elastomeric material which has a tensile modulus (measured at 25° C.) of less than about 6,000 psi (41,300 kPa).
Claim 2
Dependent Claim
53 words
A composite article of manufacture comprising 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 in a matrix of an elastomeric material which has a tensile modulus (measured at 25° C.) of less than about 6,000 psi (41,300 kPa).
Claim 3
Dependent Claim
31 words
An article as recited in claim 1, wherein said fibers are polyethylene fibers having 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 2 wherein said fiber have 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
26 words
An article as recited in claim 1, wherein said elastomeric matrix material comprises an elastomer having a glass transition temperature of less than about 0° C.
Claim 12
Dependent Claim
21 words
An article as recited in claim 10, wherein said elastomer has a glass transition temperature of less than about -40° C.
Claim 13
Dependent Claim
21 words
An article as recited in claim 10, wherein said elastomer has a glass transition temperature of less than about -50° C.
Claim 14
Dependent Claim
21 words
An article as recited in claim 1, wherein said elastomeric matrix material has tensile modulus of less than about 5,000 psi.
Claim 15
Dependent Claim
22 words
An article as recited in claim 1, wherein said elastomeric matrix material has a tensile modulus of less than about 1,000 psi.
Claim 16
Dependent Claim
22 words
An article as recited in claim 1, wherein said elastomeric matrix material has a tensile modulus of less than about 500 psi.
Claim 17
Dependent Claim
19 words
An article as recited in claim 1, wherein said fibers have a tenacity of at least about 15 g/denier.
Claim 18
Dependent Claim
22 words
An article as recited in claim 1, wherein said fibers are 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
14 words
An article as recited in claim 1, wherein said fibers are polyvinyl alcohol fibers.
Claim 21
Dependent Claim
39 words
An article as recited in claim 1 comprising a plurality of networks each of said networks comprising 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
26 words
An article as recited in claim 20, wherein the fiber alignment directions in selected networks are rotated with respect to the alignment direction of another layer.
Claim 23
Dependent Claim
25 words
An article as recited in claim 1 wherein said fibers are coated with an elastomeric material having a modulus of less than about 6000 psi.
Claim 24
Dependent Claim
21 words
An article as recited in claim 20, wherein said networks are consolidated together with a binder composed of a non-elastomeric material.
Claim 25
Dependent Claim
29 words
An article as recited in claim 22, wherein said coated fibers are in the form of yarn and a plurality of the yarns are arranged to form the network.
Claim 26
Dependent Claim
20 words
An article as recited in claim 1, wherein said network of fibers is comprised of dissimilar fibers having different compositions.
Claim 27
Dependent Claim
18 words
An article as recited in claim 1, wherein said elastomeric material consists essentially of a polystyrene-polyisoprene-polystyrene, tri-block copolymer.
Claim 28
Dependent Claim
18 words
An article as recited in claim 1, wherein said elastomeric material consists essentially of a polystyrene-polyethylene/butylene-polystyrene tri-block copolymer.
Claim 29
Dependent Claim
17 words
An article as recited in claim 1, wherein said elastomeric material consists essentially of a crosslinked polyisoprene.
Claim 30
Dependent Claim
13 words
An article as recited in claim 1, wherein said fibers comprise polyethylene strips.
Claim 31
Dependent Claim
16 words
An article as recited in claim 29, wherein said strips are woven to form said network.
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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |