Toray Industries, Inc.

Toyota Jidosha Kabushiki Kaisha

Toyota Boshoku Kabushiki Kaisha

Toyota Tsusho Corporation

Toyota Auto Body Co., Ltd.

Toyota Boshoku Co. Ltd.

Yuhei Maeda

Katsuhiko Mochizuki

Takashi Ochi

Yoshitsugu Funatsu

Hiroo Katsuta

Masanori Hashiba

Takashi Inoh

Hisashi Okuyama

Hiroshi Urayama

Koji Sugano

Hiroshi Takahashi

Takaaki Mihara

Takao Sano

Yoshiharu Okumura

Takehiro Kato

Shuichi Nonaka

Kazuya Matsumura

Tomomichi Fujiyama

Norio Suzuki

Kunihiko Ueda

Tomoko Takano

Hideki Kawashiri

Takeshi Sugimoto

Hideaki Kunisada

Osamu Mito

Shuko Arakane

Toshiaki Kimura

Katsunori Matsuda

Takaaki Sakai

Eiji Sugiyama

Kousuke Tamaki

Kouki Miyazono

Katsuhiko Toray Nakatogari Mochizuki

Takaaki A2-11 Toray-Yamashina-Shataku Mihara

A liquid crystalline polyester fiber which exhibits a half width of endothermic peak (Tm) of 15&#xb0; C. or above as observed in differential calorimetry under heating from 50&#xb0; C. at a temperature elevation rate of 20&#xb0; C./min and a strength of 12.0 cN/dtex or more; and a process for production of the same. A liquid crystalline polyester fiber which is excellent in abrasion resistance and lengthwise uniformity and is improved in weavability and quality of fabric and which is characterized by a small single-fiber fineness can be efficiently produced without impairing the characteristics inherent in fabric made of liquid crystalline polyester fiber produced by solid phase polymerization, namely, high strength, high elastic modulus and excellent thermal resistance.

Liquid crystalline polyester fiber and process for production of the same

Disclosed are liquid crystal polyester fibers, which have a peak half-width of 15&#xb0; C. or greater at an endothermic peak (Tm1) observed by differential calorimetry under a temperature elevation of 20&#xb0; C./minute from 50&#xb0; C., polystyrene equivalent weight average molecular weight of 250,000 or more and 2,000,000 or less, and a variable waveform of less than 10% in terms of the half inert diagram mass waveform determined by a Uster yarn irregularity tester. Also disclosed is a method for producing liquid crystal polyester fibers, wherein liquid crystal polyester fibers are formed into a package, the fibers are then subjected to solid-phase polymerization, and the solid-phase polymerized liquid crystal polyester fibers are unrolled from the package and successively heat treated without being once taken up. The heat treatment temperature is controlled at a temperature of the endothermic peak temperature (Tm1) of the solid-phase polymerized liquid crystal polyester fibers+60&#xb0; C. or higher, and the speeds of the fibers before and after heat treatment are regulated, respectively, by first and second rollers.

Liquid crystal polyester fibers and method for producing the same

A polyphenylene sulfide fiber has an amount of heat of crystallization measured by DSC is 10 J/g or more and the degree of shrinkage on dry heating of 150&#xb0; C.&#xd7;30 minutes is 20% or less. A method produces a densified wet-laid nonwoven fabric by subjecting paper produced in a papermaking process and containing 60 to 100% by mass of a polyphenylene sulfide fiber having an amount of heat of crystallization of 10 J/g or more and an amount of heat of crystallization of the wet-laid nonwoven fabric before heating-pressurizing treatments is 5 J/g or more to heating-pressurizing treatment at a temperature that is not lower than the glass transition temperature and not higher than the melting point of the polyphenylene sulfide fiber.

Polyphenylene sulfide fiber, method for producing the same, wet-laid nonwoven fabric, and method for producing wet-laid nonwoven fabric

A liquid crystalline polyester fiber which exhibits a half width of endothermic peak (Tm1) of 15&#xb0; C. or above as observed in differential calorimetry under heating from 50&#xb0; C. at a temperature elevation rate of 20&#xb0; C./min and a strength of 12.0 cN/dtex or more; and a process for production of the same. A liquid crystalline polyester fiber which is excellent in abrasion resistance and lengthwise uniformity and is improved in weavability and quality of fabric and which is characterized by a small single-fiber fineness can be efficiently produced without impairing the characteristics inherent in fabric made of liquid crystalline polyester fiber produced by solid phase polymerization, namely, high strength, high elastic modulus and excellent thermal resistance.

Polylactic acid fibers excellent in wearing resistance and in the ability to smoothly pass through processing steps. The polylactic acid fibers contain a fatty acid bisamide and/or an alkyl-substituted fatty acid monoamide in an amount of 0.1 to 5 wt. % based on the whole fibers.

Polylactic acid fiber yarn package, and textile products

Fibers having excellent responsiveness to magnetic field and conductivity, made of a polymer having fiber forming functions which contains magnetic material particles in spherical form having a saturation magnetic flux density of no less than 0.5 tesla. The fibers can include: (a) the average particle diameter is no greater than 5 &#x3bc;m, (b) the coercive force is no greater than 1000 A/m, and (c) the fibers are complex fibers which are made of magnetic layers that contain 20 wt % to 90 wt % of magnetic material particles, and protective layers where the content of the magnetic material particles is less than 20 wt %.

Fibers having excellent responsiveness to magnetic fields and excellent conductivity, as well as articles made of the same

The invention provides a method for manufacturing a molded woody article, which includes compression molding a base material containing wood fibers, polylactic acid fibers and an inorganic filler at a temperature not less than a melting point of the polylactic acid fibers, and maintaining the molded base material at a temperature close to a crystallization temperature of the polylactic acid fibers for a desired period of time, thereby crystallizing the polylactic acid fibers. In the molding step, the base material is entirely deformed and molded into a desired shape while the polylactic acid fibers are melted, and in the crystallizing step, the polylactic acid fibers are solidified, thereby producing the molded article. In the crystallizing step, polylactic acid crystallizes rapidly and reliably utilizing the inorganic filler as a crystal nucleating agent.

Process for producing woody molding

To provide a fiberboard capable of reducing a load on the environment at all states of producing, using, and abolishing and moreover having a high degree of bending strength and a high bending-strength retention rate at high temperature and high humidity so as to be usable for an automobile interior material or building material and a fiber-board producing method. The fiberboard is formed by mixing natural fiber with polylactic acid resin serving as a binder and has an apparent density of 0.2 g/cm.

Fiber board and its producing method

A soft stretch yarn produced by spinning yarn of conjugate fibers including two types of polyester in which one component is PTT at a take-up velocity of at least 1200 m/min, drawing at a drawing temperature of 50 to 80&deg; C. at a draw ratio such that the drawn yarn tensile elongation is 20 to 45%, and then heat setting.

Process of making yarn from two types of polyester

A poly(lactic acid) fiber has a strength at 90&deg; C. of equal to or more than 0.8 cN/dtex and exhibits significantly satisfactory mechanical properties at high temperatures as compared with conventional poly(lactic acid) fibers.

Poly(lactic acid) fiber

The present invention offers polypropylene terephthalate textured yarn which has little dyeing unevenness or fibrillation, and is outstanding in its product quality, by carrying out texturing at the same time as drawing under specified conditions using polypropylene undrawn yarn; together with a method for the production thereof.

Polypropylene terephthalate twisted yarn and method for producing the same

A soft stretch yarn substantially comprising polyester fibers has a stress, at 50% yarn stretch, of no more than 30&times;10,cN/dtex and, at the same time, a percentage recovery of at least 60%. Preferably, the Uster unevenness is no more than 2.0% and the crimp diameter is no more than 250 &mgr;m. This soft stretch yarn can be produced by spinning yarn of conjugate fibers comprising two types of polyester in which one component is PTT at a take-up velocity of at least 1200 m/min, drawing at a drawing temperature of 50 to 80&deg; C. at a draw ratio such that the drawn yarn tensile elongation is 20 to 45%, and then heat setting.

Soft stretch yarns and their method of production

A method for melt-spinning synthetic fiber, characterized by using a spinning device of which the part to be contacted with polymer in melt is coated with a film of an oxide, nitride or carbide of any of Si, Ti, Zr, Al, W, B, Ta and Ge or with a film of heat-resistant resin.

Process of melt-spinning synthetic fiber

Method and apparatus for producing polyester fiber

Growing community of inventors

Mishima, Japan

Yuhei Maeda