A method and system for forming protective composite yarns and fabrics having selected performance characteristics including cut resistance and/or fire/heat resistance, while also providing enhanced comfort and aesthetic attributes. The yarn will include fibers of a first type introduced from a first roving to a first set of drafting rollers of a spinning frame, and one or more additional types of fibers introduced from one or more additional rovings additional sets of drafting rollers of the spinning frame in an alternating fashion with the fibers of the first type. The fibers of the first type and the fibers of the additional type are substantially overlapped and successively attached and detached to form the composite yarn having attributes of the first fibers, such as increased comfort, moisture-wicking and an ability to be dyed, colored or printed, combined with technical properties of the fibers of the one or more additional types of fibers, such as cut, abrasion and/or fire/heat resistance, static dissipation, and other performance characteristics, with bands or splashes of color from such fibers incorporated therein. Fashionable or aesthetically appearing performance fabrics can be formed from the composite yarn with the desired performance and comfort characteristics.

The present invention relates to a lengthy body comprising: i) high-performance polyethylene fibers comprising a hard component, the hard component having a Mohs hardness of at least 2.5, and ii) a polymeric resin, wherein the polymeric resin is a homopolymer of ethylene or propylene or is a copolymer of ethylene and/or propylene, wherein the polymeric resin has a density as measured according to IS01183-2004 in the range from 860 to 970 kg/m.sup.3, a melting temperature in the range from 40 to 140° C. and a heat of fusion of at least 5 J/g.

A knit sleeve for providing thermal protection about an elongate member contained therein and method of construction thereof is provided. The sleeve includes a knit inner wall with opposite edges extending lengthwise between opposite ends and a circumferentially continuous tubular outer wall knit integrally with the inner wall. The outer wall bounds a central cavity that extends lengthwise along a central axis between open opposite ends of the outer wall. The opposite edges of the inner wall are substantially parallel to the central axis and are wrappable toward one another to form the inner wall as being tubular. The circumferentially continuous tubular outer wall is configured to be everted about the wrapped inner wall to circumferentially surround and protect the inner wall from abrasion and provide the sleeve with a dual layer wall.

The present invention provides a multi-ply twisted yarn for a cut-resistant fabric, and the multi-ply twisted yarn comprises (i) at least a first single yarn having a skin-core structure, wherein the skin comprises aromatic polyamide staple fibers and the core comprises tungsten filaments, and (ii) at least a second single yarn having a skin-core structure, wherein the skin comprises cut-resistant staple fibers, the core comprises at least an elastomer filament, and the cut-resistant staple fibers of the second single yarn are selected from one or more of aromatic polyamide staple fibers, aliphatic polyamide staple fibers and polyethylene staple fibers. The present invention further provides a cut-resistant fabric comprising the multi-ply twisted yarn and a protective product comprising the cut-resistant fabric.

Processes for forming a yarn formed of i) high-performance polyethylene fibers including a hard component, the hard component having a Mohs hardness of at least 2.5, and ii) a polymeric resin, wherein the polymeric resin is a homopolymer of ethylene or propylene or is a copolymer of ethylene and/or propylene, wherein the polymeric resin has a density as measured according to ISO1183-2004 in the range from 860 to 970 kg/m.sup.3, a melting temperature in the range from 40 to 140 C. and a heat of fusion of at least 5 J/g.

A transaction within a computer program or computer application comprises program instructions performing multiple store operations that appear to run and complete as a single, atomic operation. The program instructions forming a current transaction comprise a transaction begin indicator, a plurality of instructions (e.g., store operations), and a transaction end indicator. A near-end of transaction indicator is triggered based on a speculative look ahead operation such that an interfering transaction requiring a halt operation may be delayed to allow the current transaction to end. A halt operation, also referred to as an abort operation, as used herein refers to an operation responsive to a condition where two transactions have been detected to interfere where at least one transaction must be aborted and the state of the processor is reset to the state at the beginning of the aborted transaction by performing a rollback.

In one aspect, a method of manufacturing a protective textile may include steps of (a) twisting a first yarn with a tungsten filament; and (b) using a second yarn to cover the yarn-tungsten product generated in step (a). The yarn generated in step (b) is further twisted with an elastic spandex. In one embodiment, the first yarn is selected from a group of Nylon, Polyethylene Terephthalate (PET), cotton yarn, bamboo fiber and Tencel. In another embodiment, a Polyethylene (PE) fiber is the second yarn, and the third yarn may include Nylon, PET or PE. The protective textile is advantageous because it is light, thin, soft and highly cut resistant. Also, it has great electrical conductivity and chemical stability, and it is not easy to deform after washing.

A method and apparatus for producing boron nitride nanotubes and continuous boron nitride nanotube yarn or tapes is provided. The apparatus includes rotating reaction tubes that allow for continuous chemical vapor deposition of boron nitride nanotubes. The rotation of the reaction tubes allows the boron nitride nanotubes to be spun into yarns or made into tapes, without post process or external rotation or spinning of the gathered nanotubes. Boron nitride nanotube yarns or tapes of great length can be produced as a result, thereby providing industry with a readily useable format for this type of material. Dopants such as carbon can be added to engineer the band gap of the nanotubes. Catalysts may be formed outside or inside the reactor.

The cut-resistant yarn structure(130,170) comprises a core-spun yarn (135)comprising a first cut-resistant core filament (132) and staple fibers(134)spun over the first cut-resistant core filament(132), a covering yarn(139) comprising a second cut-resistant core filament (136) and a first covering layer (138) wound over the second cut-resistant core filament (136), where the first covering layer (138) comprises a first filament and a second covering layer(140) wound over the core-spun yarn(135)and the covering yarn(139), where the second covering layer(140) comprises a second filament. The cut-resistant composite yarn structure can be used to manufacture cut-resistant cloth which may in turn be used to manufacture cut-resistant garments such as cut-resistant gloves, cut-resistant sleeves and other cut-resistant garments.

The present invention discloses a highly cut-resistant ultrahigh molecular weight polyethylene fiber, made of a ultrahigh molecular weight polyethylene and an inorganic ultrafine micropowder having a nanocrystalline structural morphology, wherein the inorganic ultrafine micropowder is one of an oxide, carbide, and nitride of aluminium, titanium, silicon, boron, and zirconium, or a combination thereof, and has an average diameter of 0.1-300 m and a content of 0.1-14% of the total weight of the fiber. The present invention further discloses a method for preparing a highly cut-resistant ultrahigh molecular weight polyethylene fiber, comprising: adding nanocrystalline silicon carbide particles to a solvent, and repeatedly grinding by a sand mill; adding a ultrahigh molecular weight polyethylene, and the silicon carbide nanoparticles to a solvent, and mixing until uniform by stirring by a homogenizer with high shear, to obtain a spinning solution; and subjecting the spinning solution to conventional gelation spinning, and extracting and hot drawing the gel filament spun, to obtain a composite fiber. In the present invention, by introducing the nanocrystalline ultrafine particles into the ultrahigh molecular weight polyethylene fiber, the composite fiber of ultrahigh molecular weight polyethylene/nanocrystalline ultrafine particles has a quite excellent cut-resistant performance.