US5190802A
Expired / Lapsed
US
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Ballistic resistant laminate
Assignee: Individual
•
Filing: 1989-01-06
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Granted: 1993-03-02
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Expires: 2009-01-06
Abstract
Abstract Improved ballistic resistant laminates have been developed by bonding alternating plies of fabric woven from glass or normally solid organic polymers and non-woven scrim prepreg impregnated with a heat curable resin. A preferred organic polymer is an aramid exemplified by Kevlar. A preferred heat curable resin is phenol-formaldehyde/polyvinyl butyral blend.
Inventors
- 👤 Louis A. Pilato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:09
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B27/00; B32B27/32; B32B27/34; B32B27/36; B32B5/02; B32B5/022; B32B5/024; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/04; C08J5/047; C08J5/24; C08J5/241; C08J5/244; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0471; F41H5/0485; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/50; B32B2307/54; B32B2315/00; B32B2315/08; B32B2315/085; B32B2323/00; B32B2323/04; B32B2367/00; B32B2571/00; B32B2571/02; C08J2361/00; C08J2361/04; C08J2361/06; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/24107; Y10T442/00; Y10T442/10; Y10T442/184
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
91 words
A ballistic resistant laminate comprising alternating plies of woven fabric bonded to alternating plies of non-woven scrim prepreg through a heat curable resin in said prepreg wherein said fabric is woven from filaments of glass or at least one normally solid organic polymer having: (a) a tensile modulus of at least about 20 g/denier; (b) a tensile strength of at least about 400,000 psig; and (c) an areal density at least about 0.5 lb/ft 2 and said scrim comprises filaments of natural or synthetic fibers impregnated with a heat curable resin.
Claim 2
Dependent Claim
91 words
A ballistic resistant laminate comprising alternating plies of woven fabric bonded to alternating plies of non-woven scrim prepreg through a heat curable resin in said prepreg wherein said fabric is woven from filaments of glass or at least one normally solid organic polymer having: (a) a tensile modulus of at least about 20 g/denier; (b) a tensile strength of at least about 400,000 psig; and (c) an areal density at least about 0.5 lb/ft 2 and said scrim comprises filaments of natural or synthetic fibers impregnated with a heat curable resin.
Claim 3
Dependent Claim
12 words
Laminate claimed in claim 1 wherein the organic polymer is an aramid.
Claim 4
Dependent Claim
11 words
Laminate claimed in claim 2 wherein the aramid is poly(p-phenylene terephthalamide).
Claim 5
Dependent Claim
16 words
Laminate claimed in claim 1 wherein the fabric is woven from filaments of S-2 Glass fiber.
Claim 6
Dependent Claim
15 words
Laminate claimed in claim 1 wherein the heat curable resin is a phenol-formaldehyde/polyvinyl butyral resin.
Claim 7
Dependent Claim
19 words
Laminate claimed in claim 1 wherein the heat curable resin constitutes about 15-20% by weight of the organic polymer.
Claim 8
Dependent Claim
20 words
Laminate claimed in claim 1 wherein the heat curable resin constitutes about 20-25% by weight of the S-2 Glass fiber.
Claim 9
Dependent Claim
21 words
Laminate claimed in claim 1 wherein the cured resin slightly penetrates the interface between the woven fabric and the non-woven scrim.
Claim 10
Dependent Claim
14 words
Laminate claimed in claimed 1 wherein the organic polymer is a high modulus polyethylene.
Claim 11
Dependent Claim
11 words
Laminate claimed in claim 1 wherein the organic polymer is nylon.
Claim 12
Dependent Claim
13 words
Laminate claimed in claim 1 wherein the non-woven scrim is a polyethylene terephthalate.
Claim 13
Dependent Claim
118 words
Method of fabricating a ballistic resistant laminate which comprises: (1) assembling alternating plies of fabric woven from glass or a normally solid organic polymer and non-woven scrim prepreg impregnated with a heat curable resin and (2) subjecting the assembly of (1) to conditions of heat and pressure sufficient to cure the resin and bond the alternating plies of woven fabric and non-woven scrim into an integral structure; wherein said polymer has: (a) a tensile modulus of at least about 20 g/denier; (b) a tensile strength of at least about 400,000 psig; and (c) an areal density at least about 0.5 lb/ft 2 and said scrim comprises filaments of natural or synthetic fibers impregnated with a heat curable resin.
Claim 14
Dependent Claim
118 words
Method of fabricating a ballistic resistant laminate which comprises: (1) assembling alternating plies of fabric woven from glass or a normally solid organic polymer and non-woven scrim prepreg impregnated with a heat curable resin and (2) subjecting the assembly of (1) to conditions of heat and pressure sufficient to cure the resin and bond the alternating plies of woven fabric and non-woven scrim into an integral structure; wherein said polymer has: (a) a tensile modulus of at least about 20 g/denier; (b) a tensile strength of at least about 400,000 psig; and (c) an areal density at least about 0.5 lb/ft 2 and said scrim comprises filaments of natural or synthetic fibers impregnated with a heat curable resin.
Claim 15
Dependent Claim
21 words
Method claimed in claim 12 wherein the assembly of step (1) is shaped into a formed article during curing step (2).
Claim 16
Dependent Claim
13 words
Method claimed in claim 13 wherein the formed article is a military helmet.
Claim 17
Dependent Claim
14 words
Method claimed in claim 13 wherein the formed article is a panel of armor.
Claim 18
Dependent Claim
12 words
Method claimed in claim 12 wherein the organic polymer is an aramid.
Claim 19
Dependent Claim
11 words
Method claimed in claim 16 wherein the aramid is poly(p-phenylene terephthalamide).
Claim 20
Dependent Claim
16 words
Method claimed in claim 12 wherein the fabric is woven from filaments of S-2 Glass fiber.
Claim 21
Dependent Claim
15 words
Method claimed in claim 12 wherein the heat curable resin is a phenol-formaldehyde/polyvinyl butyral resin.
Claim 22
Dependent Claim
19 words
Method claimed in claim 12 wherein the heat curable resin constitutes about 15-20% by weight of the organic polymer.
Claim 23
Dependent Claim
20 words
Method claimed in claim 12 wherein the heat curable resin constitutes about 20-25% by weight of the S-2 Glass fiber.
Claim 24
Dependent Claim
13 words
Method claimed in claim 12 wherein the non-woven scrim is a polyethylene terephthalate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-01 | 1996-08-31 | 1997-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-01 | 2000-08-31 | 2001-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-01 | 2004-08-31 | 2005-03-02 | $7700.00 | Window Closed / Lapsed |