Teijin Limited

Musashino Chemical Laboratory, Ltd.

Other

Mutual Corporation

Teijin Chemicals Limited

Kimura, Yoshiharu

Kiyotsuna Toyohara

Tsutomu Nakamura

Katsuhiro Yamanaka

Yoshiharu Kimura

Hirotaka Suzuki

Hiroyoshi Minematsu

Jiro Sadanobu

Ryuji Nonokawa

Shin To

Yuka Komazawa

Yasuhito Maeda

Hideshi Kurihara

Katsuhiko Hironaka

Shinichiro Shoji

Akimichi Oda

Tomoyoshi Yamamoto

Fumitaka Kondo

Toyoaki Ishiwata

Hideki Yamane

Kohei Oda

Yuichi Matsuno

Takaaki Matsuda

Tsuyoshi Aoki

Midori Ikegame

Zhen Tang

Yuuichi Kageyama

Daisuke Ozaki

Keiichiro Ino

Kazumi Hiraga

Aya Ono

Kazuki Fukushima

Masayuki Takada

Daisuke Masaki

Katsuhiko c/o Teijin Chemicals Ltd Hironaka

Yuichi c/o Teijin Chemicals Ltd Matsuno

Fumitaka c/o Teijin Chemicals Ltd Kondo

Keiichiro c/o Teijin Chemicals Ltd Ino

Provided is a fiber containing a composition obtained by mixing a compound having at least a ring structure containing one carbodiimide group, the first nitrogen and second nitrogen thereof being linked together through a linking group, with a polymer compound having an acidic group. Also provided is a fiber structure made thereof. A fiber and a fiber structure, which have improved hydrolysis resistance and from which no free isocyanate compounds are produced, can be provided.

Fiber and fiber structure

There are provided a resin composition including a polylactic acid which (i) includes a poly-L-lactic acid (component B-1) and a poly-D-lactic acid (component B-4), (ii) has a weight ratio of the component B-1 to the component B-4 (component B-1/component B-4) of 10/90 to 90/10, and (iii) shows a proportion of melt peaks at 195&#xb0; C. or higher to all melt peaks in a temperature rising process in measurement by a differential scanning calorimeter (DSC) of at least 20%; a molded article of the resin composition; and methods for producing the resin composition and the molded article.

Resin composition, molded article, and production methods thereof

A composition which comprises polylactide and has excellent heat stability, color and hydrolytic resistance. The composition comprises (i) polylactide, (ii) a metal catalyst and (iii) a hypophosphorous acid-based deactivator or a metaphosphoric acid-based deactivator.

Polylactide composition

It is an object of the present invention to provide polylactic acid containing a stereocomplex crystal and having excellent moldability, a high molecular weight, high crystallinity and a high melting point and a process for manufacturing the same. It is another object of the present invention to provide a composition comprising the polylactic acid and a molded product of the polylactic acid. The present invention is characterized from polylactic acid having a weight average molecular weight of 80,000 to 500,000 and a melting peak at 195&#xb0; C. or higher which accounts for 80% or more of the total of melting peaks in the temperature elevation step when measured by a differential scanning calorimeter (DSC) and a process for manufacturing the same.

Polylactic acid and manufacturing process thereof

It is an object of the present invention to provide a composition which contains polylactic acid and has excellent heat stability, mechanical strength and color. The composition contains 0.001 to 0.1 part by weight of a metal catalyst and 0.001 to 0.5 part by weight of a phosphono-fatty acid ester based on 100 parts by weight of polylactic acid.

Polylactic acid composition

It is an object of the present invention to produce a polylactic acid having a high molecular weight such as a weight average molecular weight (Mw) of more than 100,000 from which only a stereocomplex crystal is grown even by repeating melting and crystallization. The present invention is a process of producing a polylactic acid, including the steps of:

Process of producing polylactic acid

A polycarbonate containing an ether diol residue producible from a polysaccharide and expressed by the following formula (1), and a diol residue expressed by the following formula (2)&#x2014;O&#x2014;(CH)&#x2014;O&#x2014; &#x2003;&#x2003;(2)(here, m is an integer of 2 to 12), wherein said ether diol residue amounts to 65-98 wt. % of all the diol residues, and having a glass transition temperature of 90&#xb0; C. or higher.

Polycarbonate and process for producing the same

A microorganism which belongs to the genusand has the ability of degrading an aromatic polyester, and a method of degrading an aromatic polyester by using the microorganism. According to this method, the aromatic polyester can be degraded safely and relatively swiftly at a low cost.

Microorganism capable of degrading aromatic polyester and method of degrading aromatic polyester using the same

Resin composition containing crystalline polyimide

A meta-type wholly aromatic polyamide containing, as principal repeating units, meta-phenylenediamineisophthalamide units is dissolved in an amide compound solvent; the resultant polymer solution is subjected to a wet-spinning procedure wherein the polymer solution is extruded in the form of filamentary streams into a coagulation bath containing an amide compound-containing solvent and water but substantially not containing salts, through spinning orifices of a spinneret, to coagulate the extruded filamentary polymer solution streams in the coagulation bath; the coagulated porous undrawn filaments are subjected to a drawing procedure wherein the porous undrawn filaments are drawn in a plasticizing drawing bath containing an aqueous solution of an amide compound solvent; the resultant drawn filaments are washed with water, and then heat-treated (for example, further drawn at a draw ratio of 0.7 to 4.0 while being heated at a temperature of 250 to 400&deg; C.), to provide uniform and dense meta-type wholly aromatic polyamide fibers.

Process for producing meta-type wholly aromatic polyamide filaments

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Iwakuni, Japan

Kiyotsuna Toyohara