Abstract: An object of the present invention is to provide a multilayer film and a package body of which the thickness can be reduced than that of a conventional multilayer film, by having a good impact resistance, flex resistance, and anti-pinhole property. A multilayer film 100 according to the present invention includes a repeatedly laminated part 130. The repeatedly laminated part 130 is formed by alternately and repeatedly laminating a first layer 131 and a second layer 132. The first layer 131 consists mainly of a polyamide resin (excluding elastomers). The second layer 132 consists mainly of a copolymer of an olefin-based hydrocarbon having carbon number of 2 to 4 and a vinyl group-containing monomer.

Abstract: Particle toughened, fiber-reinforced composites include a fiber region and an interlayer region between the fibers. The fiber region includes a plurality of fibers at least partially within a first polymer composition including a first base polymer formulation and a first plurality of toughening particles. The interlayer region includes a second polymer composition including a second base polymer formulation and at least one of the first plurality of toughening particles and a second plurality of toughening particles. Examples of first and second pluralities of toughening particles, respectively, may include core shell rubbers and polyimides. Increasing concentration of the first plurality of toughening particles may improve the composite toughness while preserving thermal properties of the composite, such as weight loss after extended duration exposure to elevated temperature.

Abstract: The present invention relates to light weight composite materials which comprise a metallic layer and a polymeric layer, the polymeric layer containing a filled thermoplastic polymer which includes a thermoplastic polymer and a metallic fiber. The composite materials of the present invention may be formed using conventional stamping equipment at ambient temperatures. Composite materials of the present invention may also be capable of being welded to other metal materials using a resistance welding process such as resistance spot welding.

Abstract: Bicomponent fibers of isotactic polypropylene and syndiotactic polypropylene, methods of making such fibers and products made thereof are disclosed. Embodiments of the bicomponent fibers can exhibit self-crimp properties and high shrinkage characteristics.

Abstract: A temperature-sensitive color-changeable composite fiber comprising a phase-(A) thermochromic resin phase formed of a polyolefin resin in which a thermochromic material and an adhesive resin having a molecular weight of 200 to 10,000 or a copolymer resin of an olefin with a unit monomer capable of forming a polymer having a solubility parameter (SP value) of 9.0 or more have been dispersed or dissolved, and a phase-(B) resin phase selected from nylon 12, a copolymer nylon, polyhexamethylene terephthalate and a saturated aliphatic polyester; the phase-(A) and the phase-(B) being joined to each other. This fiber can satisfy the glossiness and touch of fibers, and color changes caused by temperature changes can clearly be sighted thereon. It also can enhance commercial value of various fiber materials and that of wigs for doles and so form, making use of such a fiber.

Abstract: High strength polyethylene fibers and their applications, for example, chopped fibers, ropes, nets, ballistic materials or items, protective gloves, fiber reinforced concrete products, helmets, and other products obtained therefrom, in which the fiber is characterized in that: it contains a high molecular weight polyethylene consisting essentially of a repeating unit of ethylene; it has an intrinsic viscosity number of 5 or larger and an average strength of 22 cN/dtex or higher; and the measurement of the fiber by differential scanning calorimetry (DSC) exhibits a temperature-increasing DCS curve having at least one endothermic peak over a temperature region of 140° C. to 148° C. (on the low temperature side) and at least one endothermic peak over a temperature region of 148° C.

Abstract: The present invention is directed to chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight to less than the total chitosan content. The antimicrobial activity of the chitosan-containing acrylic fibers of the present invention can persist for a long period of time and is not deteriorated even when subjected to posttreatments, such as dyeing and bleaching of fibers, and treatments in usual service environments of fiber products, such as washing and ironing.

Abstract: A method for manufacturing improved regenerated cellulose fiber, by adding a crosslinking agent having two or more reactive functional groups in a molecule to a cellulose viscose solution and mixing, then extruding the viscose solution into a coagulation and regeneration bath, followed by applying a heat treatment, or followed by contacting obtained regenerated cellulose fiber with an aqueous solution of a crosslinking agent having two or more reactive functional groups in a molecule then applying a heat treatment.

Abstract: Described in the present invention is a high strength polyethylene naphthalate fiber which provides a treated cord having high tenacity and improved dimensional stability that can be advantageously employed as a fibrous reinforcement material of rubber products such as tires and belts.

Abstract: A texturized, combined polyester multifilament yarn formed from two types of polyester multifilaments FYA and FYB different in polymer chemical composition from each other and appropriately intermingled with each other, in which yarn, the multifilaments FYB have an average filament length in straightened form of 8 to 40% longer than that of the multifilaments FYA, the coefficient of variation (CVA) of the filament length of FYA is 3% or less, and coefficient of variation (CVB−A) in difference between the individual filament lengths of the FYB and the average filament length of the FYA is 10 to 20%. The yarn exhibits a high bulkiness and a large filament yarn difference and is free from slippage between the sheath FYB layer and the core FYA portion.

Abstract: A positive variable resistive yarn having a core, a sheath, and an insulator. The sheath includes distinct electrical conductors intermixed within a thermal expansive low conductive matrix. As the temperature of the yarn increases, the resistance of the sheath increases.

Abstract: According to the present invention, polytrimethylene terephthalate fiber is provided, which is high in toughness, uniform in fiber size and excellent in dyeing uniformity, whereby it is extremely suitable for a clothing use. Polytrimethylene terephthalate fiber according to the present invention can be produced by a two-step method consisting of a low speed spinning process and a drawing process, wherein the winding condition of undrawn fiber, the atmospheric condition under which the undrawn fiber is retained and the time for retaining the undrawn fiber are set to a specific range so that the shrinkage of undrawn fiber with time and the transformation of the undrawn package caused thereby are minimized. Thus, the unwinding tension of the undrawn fiber is maintained constant whereby the drawing is favorably carried out to result in a high quality polytrimethylene terephthalate fiber.

Abstract: A fine carbon fiber having an outer diameter of about 1 to about 80 nm and an aspect ratio of 10 to 30,000, comprising a hollow center portion and a multi-layer sheath structure of a plurality of carbon layers, the layers forming annual rings, wherein the sheath-forming carbon layers form an incomplete sheath, i.e., the carbon layers are partially broken or disrupted in a longitudinal direction, and the outer diameter of the carbon fiber and/or the diameter of the hollow center portion are not uniform in a longitudinal direction. The carbon fiber is obtained by instantaneously reacting a carrier gas at a high temperature and an organic compound gas kept at a temperature below the decomposition temperature of the transition metal compound and has a conductivity equivalent to that of a conventional vapor phase method and is useful as a filler material in resins, rubbers, paints and the like.

Abstract: Fine carbon fibers having a fiber diameter of 1 &mgr;m or less, an interlayer distance d002 between carbon layers as determined by an X-ray diffraction method of 0.335 to 0.342 nm or less and satisfying d002<0.3448−0.0028 (log &phgr;) where &phgr; stands for the diameter of the carbon fibers, and a thickness Lc of the crystal in the C axis direction of 40 nm or less. Fine carbon fibers containing boron in crystals of the fiber. The fine carbon fibers can be produced by using vapor-grown fine carbon fibers as a raw material, adding a boron or a boron compound to the material; pressing the mixture to regulate the bulk density to preferably 0.05 g/cm3 or more; and heating at a temperature of 2000° C. or higher.

Abstract: The present invention provides a partially or whole flat synthetic fiber which is suitably used for preparing a high strength non-woven fabric even if the basis weight is very small, as well as a non-woven fabric prepared using such flat synthetic fibers. According to the present invention, a flat polybenzazole fiber such as PBO fiber is provided which has a flattened portion having a degree of flatness defined by the ratio of the long diameter/the short diameter of the cross section of the fiber being 2 or higher and having a short diameter being 7 &mgr;m or less. Also, a partially flat synthetic fiber is provided which has a flattened portion along the longitudinal direction of the fiber, wherein the ratio of Wmax (the maximum fiber width)/Wmin (narrowest fiber width) is 2 or higher or wherein the ratio of Wmax (the maximum fiber width)/Wav (average fiber width) is 1.5 or higher.

Abstract: A composite textured air-entangled multi-filament yarn having two or more continuous filament feed yarns, each of which is of different color or dyeability from the other, each feed yarn being pigmented in a melt-spinning process, pre-dyed, or undyed with different dye affinities which are subsequently dyed, the feed yarns being combined into a composite yarn having repeated color change alternating cycles along its length, and the alternating cycles having between them a lengthwise color difference of about 15-95% or more on the circumferential surface of the yarn in either the red, green or blue primary colors, as measured by spectral analysis, between immediately adjacent lengths thereof, and each adjacent color length being between about 4 inches to 144 inches.

Abstract: To provide the heat-meltable fluorine-containing resin fiber having excellent intermingling property and various materials for fiber products obtained therefrom. The heat-meltable fluorine-containing resin such as ETFE having a branched structure is used solely or mixed to other fiber such as an electrically conductive fiber to be formed into a non-woven fabric.

Abstract: A composition including an aromatic polyester and a copolyester having a lower melting point than the aromatic polyester. The aromatic polyester and the copolyester can be blended together to form fibers and fibrous webs. The composition can be thermally bonded at a temperature below the melting point of the aromatic polyester.

Abstract: Low shrinkage, short-cut polyethylene terephthalate fiber exhibiting dispersibility suitable for incorporation into wet laid non-woven products is produced through the use of steam-annealing. The preferred fibers exhibit a hot air shrinkage value of less than about 10 percent, have a length of less than 3 inches, and a dispersion index of less than 5.

Abstract: An improved polyurethane-urea elastic fiber is obtained by incorporating a specific urea compound prepared by reacting the following compounds together: (a) a nitrogen-containing compound having both at least one bifunctional amine group selected from a group consisting of a primary amine group and a secondary amine group and at least one nitrogen-containing group selected from a group consisting of a tertiary nitrogen group and a heterocyclic nitrogen group; (b) an organic diisocyanate; and (c) at least one compound selected from the group consisting of a mono- or di-alkylmonoamine, an alkylmonoalcohol and an organic monoisocyanate. With the incorporation of the specific urea compound, the polyurethane-urea elastic fiber which can be fast dyed exhibits enhanced thermosettability and increased elastic functions can be produced through a stabilized spinning process.