Ballistic resistant and fire resistant composite articles
View Patent ↗Ballistically resistant and fire resistant composite articles for aircraft interiors and other applications. Composite articles are provided having a flexural modulus of at least about 80,000 lbs/sq. in (552 MPa), a flexural strength at yield of at least about 800 lbs/sq. in. (5.52 MPa), an areal density of about 0.9 lb/ft 2 (4.40 kg/m 2 ) to about 1.5 lb/ft 2 (5.86 kg/m 2 ), a fire resistance meeting the requirements of §25.853 Title 14 of the United States Code, Jan. 1, 2002, and a V0 velocity of at least about 1430 ft/sec (427 m/s) when tested by United States Federal Aviation Administration Advisory Circular 25.795.2, 10 Jan. 2002, using .44 Magnum Jacketed Hollow Point (JHP) bullets of 240 grains (15.6 g) mass and using 9 mm Full Metal Jacketed, Round Nose (FMJ RN) bullets of 124 grains (8.0 g) mass.
1. A composite article comprising a polymeric flammable fibers in a network said article having a flexural modulus of at least about 80,000 lbs/sq. in (552 MPa) as measured by ASTM D 790-00, a flexural strength at yield of at least about 800 lb/sq. in. (5.52 MPa) as measured by ASTM D 790-00, an areal density of about 0.9 lb/ft 2 (4.40 kg/m 2 ) to about 1.5 lb/ft 2 (5.88 kg/m 2 ), a fire resistance meeting the requirements of §25.853 Title 14 of the United States Code, Jan. 1, 2002, and a V0 velocity at least about 1430 ft/sec (427 m/s) when tested by United States Federal Aviation Administration Advisory Circular 25.795.2, 10 Jan. 2002, using .44 Magnum Jacketed Hollow Point (JHP) bullets of 240 grains (15.6 g) mass and using 9 mm Full Metal Jacketed, Round Nose (FMJ RN) bullets of 124 grains (8.0 g) mass.
2. A composite article comprised of a plurality of plies bonded together, said composite having an areal density of about 0.9 lb/ft 2 (4.40 kg/ m2 ) to about 1.5 lb/ ft2 (5.86 kg/ m2 ), a fire resistance meeting the requirements of §25.853 Title 14 of the United States Code, Jan. 1, 2002, and a V0 velocity at least about 1430 ft/sec (427 m/s) when tested by United States Federal Aviation Administration Advisory Circular 25.795.2, 10 Jan. 2002, using .44 Magnum Jacketed Hollow Point (JHP) bullets of 240 grains (15.6 g) mass and using 9 mm Full Metal Jacketed, Round Nose (FMJ RN) bullets of 124 grains (8.0 g) mass wherein a first ply is comprised of a metal foil, a second ply is comprised of a fire retardant bonding material and a third ply is comprised of a plurality of layers, each of said layers comprising a network of flammable polymeric fibers in a matrix, said polymeric fibers having a tenacity of at least about 17 g/denier, a tensile modulus of at least about 500 g/denier and an energy-to-break of at least about 20 Joules/g.
3. The composite article of claim 2 , additionally comprised of a fourth ply comprising a fire retardant bonding material and a fifth ply comprising a metal foil.
4. The composite article of claim 2 , additionally comprising an intumescent resinous composition ply between said first and said second plies.
5. The composite article of claim 4 , additionally comprising a fifth ply consisting of an intumescent resinous composition, a sixth ply comprised of a fire retardant bonding material and a seventh ply comprised of a metal foil.
6. The composite article of claim 2 or claim 4 , wherein said metal foil is aluminum having a thickness from about 0.0005 inches (12.7 micrometers) to about 0.005 inches (127 micrometers).
7. The composite article of claim 2 or claim 4 , wherein said fire retardant bonding material is comprised of a polymeric binder selected from the group consisting of polyolefins, polydienes, polyesters, polyamides, vinyl polymers, ionomers, acrylics, acrylates, polysulfones, polyphenylene oxide, acetals, silicones, thermoplastic polyurethanes, thermoplastic polyimides, polyketones, phenolic polymers, melamine polymers, epoxies, silicones, unsaturated polyesters, thermosetting polyurethanes, and copolymers and halogenated derivatives thereof, and at least one member selected from the group consisting of organic, inorganic and organometallic fire retardants,
said organic fire retardant is at least one member selected from the group consisting of phosphorus functional, phosphorus-chlorine functional, compounds containing phosphorus and sulfur, compounds containing phosphorous and bromine, compounds containing phosphorous and chlorine, phosphites, phosphates, phosphonates, OH-functional bromine compounds , OH-functional chlorine compounds, nitrogen-halogen functional, vinyl functional halogen compounds, epoxide functional halogen compounds, anhydride functional halogen compounds, acid functional halogen compounds, aldehyde functional halogen compounds, amine functional halogen compounds, non functional halogen compounds, halogenated phenyls, halogenated paraffins and cholo-naphthalenes,
said inorganic fire retardant is at least one member selected from the group consisting of antimony oxide (Sb 2 O 3 ), antimony sulfides (Sb 2 OS 3 , Sb 2 S 3 , Sb 2 S 4 ), antimony halides (SbCl 3 , SbCl 5 , SbBr 3 , SbBr 5 ), sodium or potassium antimonite, e.g., (NaSbO 3 ), ammonium, sodium or potassium phosphates, e.g., ((NH 4 ) 3 PO 4 , (NH 4 ) 2 HPO 4 , (NH 4 )H 2 PO 4 , (NH 4 PO 3 ) x ), phosphorus halides (PCl 3 , PCl 5 , POCl 3 ), phosphonitrilic chloride (PNCl 2 ) x , phosphorus pentasulfide (P 2 S 5 ), sodium borates (Na 2 O(B 2 O 3 ) 3.5 .4H 2 O, Na 2 B 4 O 7 .10H 2 O), sodium, potassium or ammonium tetrafluoroborate, e.g. (NaBF 4 ), calcium or barium borates, e.g., (Ca(BO 2 ) 2 , Ca 3 (BO 3 ) 2 ), lithium, sodium or potassium tetraborate, e.g. (LiB 4 O 7 ), boric acid (H 3 BO 3 ), trimethoxyborozine ((CH 3 OBO) 3 ), aluminum oxide hydrates (Al 2 O 3 .3H 2 O, Al(OH) 3 ), aluminophosphate hydrates (Al 2 O 3 .(AlPO 4 ) x .(H 2 O) y ), sodium silicates ((Na 2 O) n SiO 2 ) m ), ammonium bromide (NH 4 Br), ammonium sulfate ((NH 4 ) 2 SO 4 ), lithium silicates (LiO 2 (SiO 2 ) 5.9 , Li 2 O(Na 2 O) n (SiO 2 ) m )), molybdenum oxide (MoO 3 ), ammonium paramolybdate ((NH 4 ) 6 Mo 7 O 24 (H 2 O) x ), molybdenum sulfide (MoS 2 ), and sulfamide ((NH 2 ) 2 SO 2 ), said organometallic fire retardant is at least one member of the group consisting of
8. The composite article of claim 2 or claim 4 , wherein said fire retardant bonding material is a blend of antimony oxide (Sb 2 O 3 ), decabromodiphenyl ether and polychlorinated paraffin wax in a polyacrylate resin binder.
9. The composite article of claim 2 or claim 4 , wherein said flammable polymeric fibers are polyethylene.
10. The composite article of claim 9 , wherein said polyethylene fibers are unidirectionally oriented within a layer, and wherein fibers in adjacent layers are oriented at about 90° to one another.
11. The composite article of claim 2 or claim 4 , wherein said matrix is an elastomer having a initial tensile modulus of less than about 6000 psi (41.4 MPa) as measured by ASTM D638.
12. The composite article of claim 11 , wherein said matrix is an elastomer comprising a block copolymer of a congugated diene and a vinyl aromatic monomer.
13. The composite article of claim 12 , wherein said intumescent resinous composition is additionally comprised of about 2 to about 35 wt % of glass bubbles.
14. The composite article of claim 2 or claim 4 , wherein said matrix is a thermosetting resin having a tensile modulus of at least about 300 kpsl (2.1 GPa).
15. The composite article of claim 14 , wherein said matrix is an epoxy vinyl ester resin.
16. The composite article of claim 4 , wherein said intumescent resinous composition is comprised of a spumific selected from the group consisting of melamine, melamine salts, melamine derivatives urea, dicyandiamide and guanidine dispersed in a resin selected from the group consisting of phenolic polymers, melamine polymers, epoxies, silicones, unsaturated polyesters, and thermosetting polyurethanes.
17. The composite article of claim 4 , wherein said intumescent resinous composition is comprised of at least one member selected from the group consisting of melamine pyrophosphate (C 3 H 6 N 6 .H 4 P 2 O 7 ) and bis(melamine pyrophosphoric) acid (C 6 H 12 N 12 .H 4 P 4 O 7 ), and a member selected from the group consisting of a formaldehyde-furfural-resorcinol-phenol resin and an epoxy resin.
18. The composite article of claim 2 having a flexural modulus of at least about 80,000 lbs/sq. in (552 MPa), as measured by ASTM D 790-00, a flexural strength at yield of at least about 800 lb/sq. in. (5.52 MPa) as measured by ASTM D790-00, a fire resistance meeting the requirements of §25.853 Title 14 of the United States Code, Jan. 1, 2002, and a V0 velocity at least about 1430 ft/sec (427 m/s) when tested by United States Federal Aviation Administration Advisory Circular 25.795.2, 10 Jan. 2002, using .44 Magnum Jacketed Hollow Point (JHP) bullets of 240 grains (15.6 g) mass and using 9 mm Full Metal Jacketed, Round Nose (FMJ RN) bullets of 124 grains (8.0 g) mass.