Abstract:
Fibrous substrates and articles that retain their superior ballistic resistance performance after exposure to liquids such as sea water and organic solvents, such as gasoline and other petroleum-based products. The fibrous substrates are coated with a multilayer polymeric coating including at least two different polymer layers wherein at least one of the layers is formed from a fluorine-containing polymer.
Abstract:
A system to protect structures (12) in a marine environment from the effects of an impact force. The system includes a plurality of floatable devices / panels (20) and a plurality of fibrous networks (26). The fibrous networks include high tenacity fibers which extend at least in a generally horizontal direction and are in communication with the plurality of floatable devices / panels. The plurality of fibrous networks are disposed in a generally parallel arrangement with respect to each other and are vertically spaced apart by a distance not exceeding about 12 inches (30.5 cm). The system is designed to be spaced from the structure to be protected.
Abstract:
Ballistic resistant articles having excellent resistance to deterioration due to liquid exposure. More particularly, a ballistic resistant structures and articles formed from a hybrid of woven and non-woven fibrous components that retain their superior ballistic resistance performance after exposure to liquids such as sea water and organic solvents, such as gasoline and other petroleum-based products. The hybrid structures are particularly useful for the formation of or for use in conjunction with soft, flexible body armor.
Abstract:
Plastic pipes, such as high density polyethylene plastic pipes, useful for distributing natural gas and which have improved impact resistance and burst strength. The plastic pipe has an inner and an outer surface, with the inner surface defining a channel for conveying natural gas and the like. A fabric overlies the outer surface, preferably in a helical wrap. The fabric is formed of high tenacity polyolefin fibers, preferably polyethylene and/or polypropylene fibers. The fabric provides the pipe with improved burst strength and impact resistance. The pipe can be used to transport natural gas under low pressure or higher pressures.
Abstract:
Woven fabrics are formed from high tenacity fibers or tapes that are loosely interwoven with adhesive coated filaments, to composite articles formed therefrom, and to a continuous process for forming the composite articles.
Abstract:
Highly uniform woven fibrous structures formed from fibrous tapes, wherein the tapes constitute the warp and weft tapes of a woven fabric. The individual fibrous tapes may be woven or non-woven, and may be formed as narrow tapes or may be cut from a wider fabric web.
Abstract:
Body armor vests and other articles having combined ballistic performance and overall weight characteristics are described. A representative body armor vest comprises both a rigid breast plate and a flexible fabric adjoining the breast plate. Both components may comprise a plurality of unidirectionally oriented fibrous layers comprising fibers having high tenacity and a high tensile modulus.
Abstract:
A helmet shell is formed having an outer section of fibrous layers, a middle section of fibrous layers and an inner section of fibrous layers. The outer section layers contain high tenacity abrasive fibers in a resin matrix. The middle section layers contain high strength polyolefin fibers and are in the form of woven or knitted fabrics with a resin matrix. The inner section layers contain high strength polyolefin fibers and are in the form of non-woven fabrics with a resin matrix. The helmet is lightweight and resists penetration of rifle bullets.
Abstract:
Ballistic resistiint fabric laminates are provided. More particularly, reinforced, delamination resistant, ballistic resistant composites are provided. The delamination resistant, ballistic resistant materials and articles may be reinforced by various techniques, including stitching one or more ballistic resistant panels with a high strength thread, melting the edges of a ballistic resistant panel to reinforce areas that may have been frayed during standard trimming procedures, wrapping one or more panels with one or more woven or non- woven fibrous wraps, and combinations of these techniques. The delamination resistant, ballistic resistant pane Is may further include at least one rigid plate attached thereto for improving ballistic resistance performance.
Abstract:
A composite material which has excellent ballistic performance and has improved flexibility. Surprisingly, it has been found that a combination of poly(alpha-olefin) fiber and matrix resin provides these desirable product features. The resin matrix is a block copolymer of a conjugated diene and a vinyl aromatic monomer, preferably a styrene-isoprene-styrene block copolymer, that is applied as an aqueous composition. The fiber has a tenacity of at least about 35 g/d and a tensile modulus of at least about 1200 g/d. The composite has a total density equal to or less than about 100 g/m2 and a stiffness of less than about 2.5 pounds (1.14 kg) for a two layer structure of the composite, and a total areal density equal to or less than about 190 g/m2 and a stiffness of less than about 3.0 pounds (1.36 kg) for a four layer structure of the composite. The Peel Strength for a two layer structure of less than about 1.0 pounds (0.45 kg) for a two layer structure of the composite, and less than about 0.7 pounds (0.32 kg) for a four layer structure of the composite. The process of this invention permits fabrication of these desirable products in a cost-effective manner. Body armor made from the composite has improved flexibility and excellent ballistic characteristics.
Abstract translation:这种复合材料具有优异的弹道性能并具有改进的灵活性。 令人惊讶的是,已经发现聚(α-烯烃)纤维和基质树脂的组合提供了这些所需的产品特征。 树脂基体是共轭二烯和乙烯基芳族单体的嵌段共聚物,优选苯乙烯 - 异戊二烯 - 苯乙烯嵌段共聚物,其作为含水组合物施加。 该纤维具有至少约35g / d的韧度和至少约1200g / d的拉伸模量。 对于复合材料的双层结构,复合材料具有等于或小于约100g / m 2的总密度和小于约2.5磅(1.14kg)的硬度,总面密度等于或小于约190 g / m 2,并且对于复合材料的四层结构,刚度小于约3.0磅(1.36kg)。 两层结构的剥离强度对于复合材料的双层结构小于约1.0磅(0.45kg),对于复合材料的四层结构小于约0.7磅(0.32kg)。 本发明的方法允许以成本有效的方式制造这些理想的产品。 由复合材料制成的防弹衣具有改进的弹性和优异的弹道特性。