A method for weaving a three-dimensional preform includes the following steps: decomposing and determining performance requirements of different functional locations of the parts; selecting guide sleeves and fibers of each of the functional locations and designing a parameter; selecting guide sleeves and fibers of a transition area and designing a parameter, thereby implementing smooth transition of the transition area; determining a weaving sequence according to layouts of the guide sleeves and winding manners of the fibers in the functional locations and the transition area to generate a fiber iterative instruction for layer-by-layer weaving; arranging guide sleeves according to design requirements of the functional locations and the transition area to generate a guide sleeve array; and driving a weaving mechanism to select different fibers for subarea weaving layer by layer to obtain the three-dimensional preform having a gradient structure.

A method for improving the translation efficiency of fiber strength into composite strength is provided. A single unidirectional tape, single unidirectional fiber web or a stack of unidirectional web/unidirectional tape plies formed from partially oriented fibers/tapes is primed under mild conditions followed by subjecting the primed plies to an axial extension stress in the axial fiber direction of each fiber ply by passage through a compression apparatus. The axial extension stress extends the fibers, strengthening them, while also compacting the plies together and thereby forming a composite having improved strength. Production yield is improved by avoiding maximal fiber stretching and thereby avoiding typical manufacturing loss, and low weight composite armor having increased strength is achieved.

The present invention relates to a textile sheet material (sheet structure) with splinter, stab and/or cut protection, in particular for use in protective clothing or protective equipment, preferably for the military and/or civilian sector.

A braided rope includes a plurality of braided strands comprising twisted yarns. Each of the twisted yarns includes a blend of first fibers and second fibers. The first fibers are high modulus polyethylene (HMPE) fibers and the second fibers may be lyotropic polymer filaments, thermotropic polymer filaments, or polyphenylene benzobisoxazole fibers. The first fibers can have a creep rate of no more than 3.0×10.sup.−8 percent per second at 20° C. while subjected to a stress of 5.0 grams/dtex. The first fibers can have a creep rate of no more than 1.0×10.sup.−7 percent per second at 20° C. while subjected to a stress of 7.5 grams/dtex.

Disclosed is a skin cooling fabric that can provide a user with a soft tactile sensation as well as a cooling feeling or a cooling sensation, a polyethylene yarn having improved weavability, and a method for manufacturing the yarn. The skin cooling fabric of the present invention includes a plurality of weft yarns, and a plurality of warp yarns, wherein each of the weft yarns and warp yarns has a tensile strength of 3.5 to 8.5 g/de, a tensile modulus of 15 to 80 g/de, elongation at break of 14 to 55%, and crystallinity of 55 to 85%.

Woven UHMWPE fabric stretches in the bias direction to such an extent that it is unsuitable for many potential applications and is porous, allowing air and water transmission. A composite UHMWPE material includes a single ply of high tenacity woven UHMWPE fabric having warp fibers in a first direction and weft fibers in a second direction orthogonal to the first direction. The UHMWPE fabric has first face and a second face. A stretch resisting axially oriented fusion layer is fused to at least one of the first face or the second face of the UHMWPE fabric with an axis aligned parallel to at least one of the UHMWPE fabric warp and weft axes, such that the stretch resisting fusion layer increases fabric tensile strength and inhibits bias stretch of the UHMWPE fabric, and renders the UHMWPE woven fabric air and water impermeable.

The present invention relates to a polyolefin fiber comprising polymeric structures, wherein the polymeric structures individually comprise a polycondensate and a functionalized polymer, and the polyolefin fiber is a gel-spun high-performance polyethylene fiber that has a tenacity of at least 1 N/tex. The polymeric structures are immiscible with and dispersed in the polyethylene fiber. The gel-spun high-performance polyethylene fiber is a gel-spun ultrahigh molecular weight polyethylene fiber. The present invention further relates to a process for making the polyolefin fiber comprising the steps of: melt-mixing the polycondensate or a polycondensate containing at least one additive, the functionalized polymer, and optionally the thermoplastic polymer and/or the at least one additive, to form polymeric structures; mixing polyolefin powder, the polymeric structures and a solvent to form a mixture; and spinning and drawing the mixture obtained in step ii) to form the polyolefin fiber comprising the polymeric structures.

A sailcloth including a woven fabric of a first fiber material and a second fiber material woven into it, in which the second fiber material forms a network structure within the woven fabric, with the second fiber material having a higher tearing resistance than the first fiber material and with the second fiber having a sliding ability within the woven fabric.

A wind lift mitigation net for mitigating or preventing wind lift of at least one membrane covering an outdoor aggregation of matter is provided. The wind lift mitigation net comprises a plurality of monofilaments. At least some of the monofilaments may each have a cross-sectional shape that comprises at least one vertex. The cross-sectional shape may, for example, be a non-circular shape such as a tear drop, triangular, square or stellate shape. At least some of the monofilaments may each have at least one substantially planar surface.

A woven geotextile fabric utilizes a plurality of yarns including machine direction field yarns, cross machine direction field yarns, machine direction rib yarns, and cross machine direction rib yarns. The plurality of yarns is integrally woven together. The machine direction rib yarns and the cross machine direction rib yarns cooperatively define an integrated geotextile grid integrally within the woven geotextile fabric. The machine direction field yarns and the cross machine direction field yarns cooperatively define fabric areas in a field of the integrated geotextile grid generally between the machine direction rib yarns and the cross machine direction rib yarns.