Rigid ballistic composites having large denier per filament yarns
AssigneeBarrday Inc.
InventorJason Aaron van Heerden
Life of this patent
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Abstract
A rigid ballistic-resistant composite includes large denier per filament (dpf) yarns. The yarns are held in place by a resin to form a rigid composite panel with improved ballistic performance. The large dpf yarns may be selected from aromatic heterocyclic co-polyamide fibers, polyester-polyarylate fibers, high modulus polypropylene (HMPP) fibers, ultra high molecular weight polyethylene (UHMWPE) fibers, poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers, poly-diimidazo pyridinylene (dihydroxy) phenylene (PIPD) fibers, carbon fibers, and polyolefin fibers.
Claims17
A rigid ballistic-resistant composite, comprising:
- a) a plurality of yarns arranged into a fabric, the yarns having a “Composite-Armor dpf factor” (CA·dpffactor) selected to provide improved ballistic performance;
- and
- b) a resin in contact with the fabric to form a rigid composite panel in which the yarns of the fabric are held in place by the resin,
- wherein CA·dpffactor is determined according to the following equation:
- CA
- ·
- dp
-
- f
- factor
- =
- d
- p
-
- f
- y
-
- a
-
- r
-
- n
- (
- 1
- (
- S
- .
- G
- .
- yarn
- )
- 3
- )
- =
- d
-
- p
-
- f
- y
-
- a
-
- r
-
- n
- ×
- (
- S
- .
- G
- .
- yarn
- )
- 3
- ,
- wherein dpfyarn is a denier per filament of the yarns,
- wherein S.G.yarn is a specific gravity of the yarns, and
- wherein the yarns have a CA·dpffactor of less than 85, and are selected from the group consisting of:
- polyester-polyarylate fibers having a CA·dpffactor of greater than 13.72;
- and
- high modulus polypropylene (HMPP) fibers having a CA·dpffactor of greater than 6.03.
A rigid ballistic-resistant composite, comprising:
- a) a resin;
- and
- b) a plurality of yarns held in place by the resin,
- wherein the yarns have a “Composite-Armor dpf factor” (CA·dpffactor) determined according to
- CA
- ·
- dp
-
- f
- factor
- =
- d
- p
-
- f
- y
-
- a
-
- r
-
- n
- (
- 1
- (
- S
- .
- G
- .
- yarn
- )
- 3
- )
- =
- d
-
- p
-
- f
- y
-
- a
-
- r
-
- n
- ×
- (
- S
- .
- G
- .
- yarn
- )
- 3
- ,
- wherein dpfyarn is a denier per filament of the yarns,
- wherein S.G.yarn is a specific gravity of the yarns, and
- wherein the yarns comprise at least one of:
- polyester-polyarylate fibers having a CA·dpffactor of greater than 13.72;
- and
- high modulus polypropylene (HMPP) fibers having a CA·dpffactor of greater than 6.03.
Dependencies are inferred from the claim text.