Impact protective composite material
AssigneeKaleidoscope Tech (Pty) Ltd
InventorsMarius Wilken Van Schalkwyk, Hendrik Petrus Naudé
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Abstract
This invention pertains to an impact protective composite material (10) for a flexible bulletproof garment. The impact protective composite material (10) includes a first element (20) that comprises a plurality of layers (20.1 to 20.n) formed from ultra-high molecular weight polyethylene and a second element (30) that comprises a layer formed from ultra-high molecular weight polyethylene, the second element being encased in polyurea.
Claims20
A lightweight and flexible impact protective composite material having a strike face side and a back face side, the lightweight and flexible protective composite material comprising, in order from the strike face side to the back face side:
- a strike face side first element comprising a plurality of overlying layers formed from a material selected from the group consisting of:
- meta-aramids, para-aramids, ultra-high molecular weight polyethylene, polyethylene terephthalate, cellulose, polyamide, a mixture of para-aramids and meta-aramids and a mixture of para-aramids and carbon, and a combination thereof, each layer of the plurality of overlying layers forming the strike face side first element all formed by interlaced yarns of fibers, or each layer of the plurality of overlying layers forming the strike face side first element all formed by sintering;
- and
- a back face side second element comprising a back face layer formed from a material selected from the group consisting of:
- meta-aramids, para-aramids, ultra-high molecular weight polyethylene, polyethylene terephthalate, cellulose, polyamide, a mixture of para-aramids and meta-aramids and a mixture of para-aramids and carbon, and a combination thereof, the back face layer being formed by interlaced yarns of fibers or by sintering, the back face layer encased in an elastomer on all sides,
- wherein each layer of the plurality of layers of the strike face side first element or the back face layer of the back face side second element comprises ultra-high molecular weight polyethylene having an area density of between 50±8 grams per square meter (g/m2) and 300±8 grams per square meter (g/m2) and a thickness of between 0.07±0.02 millimeters (mm) and 0.40±0.02 millimeters (mm).
A lightweight and flexible impact protective composite material having a strike face side and a back face side, the lightweight and flexible protective composite material consisting essentially of, in order from the strike face side to the back face side:
- a strike face side first element comprising a plurality of overlying layers formed from a material selected from the group consisting of:
- meta-aramids, para-aramids, ultra-high molecular weight polyethylene, polyethylene terephthalate, cellulose, polyamide, a mixture of para-aramids and meta-aramids and a mixture of para-aramids and carbon, and a combination thereof, each layer of the plurality of overlying layers forming the strike face side first element all formed by interlaced yarns of fibers, or each layer of the plurality of overlying layers forming the strike face side first element all formed by sintering;
- and
- a back face side second element comprising a back face layer formed from a material selected from the group consisting of:
- meta-aramids, para-aramids, ultra-high molecular weight polyethylene, polyethylene terephthalate, cellulose, polyamide, a mixture of para-aramids and meta-aramids and a mixture of para-aramids and carbon, and a combination thereof, the back face layer being formed by interlaced yarns of fibers or by sintering, the back face layer encased in an elastomer on all sides,
- wherein each layer of the plurality of layers of the strike face side first element or the back face layer of the back face side second element comprises ultra-high molecular weight polyethylene having an area density of between 50±8 grams per square meter (g/m2) and 300±8 grams per square meter (g/m2) and a thickness of between 0.07±0.02 millimeters (mm) and 0.40±0.02 millimeters (mm).
Dependencies are inferred from the claim text.