Asahi Kasei Kabushiki Kaisha

Asahi Kasei Kogyo Kabushiki Kaisha

Asahi Kasei Fibers Corporation

Shinichi Okajima

Jinichiro Kato

Katsuhiro Fujimoto

Takayuki Ogawa

Yusuke Yamada

Kazufumi Kato

Tetsuko Takahashi

Rumina Obi

Junichi Kusakabe

Minoru Fukui

Kenji Imura

Chihiro Masuda

Minoru Yoshida

Provided is a cellulose fiber nonwoven fabric with compacted parts that is beautiful even when dry. The cellulose fiber nonwoven fabric is characterized in that: the fabric has compacted parts; the percentage of recesses due to the compacting is 9-25%; the transverse rupture strength is at least 15 N; the transmittance of the compacted parts when dry is 3-25%; and the fabric weight is 30 g/mto 110 g/m.

Cellulose nonwoven fabric having compacted parts

Provided is a separator which shows excellent performance in electric insulation, electrolyte-holding property and ion- or electron-permeability and which can be stably manufactured. The separator is configured from a laminate non-woven fabric consisting of at least two layers, said layers including a non-woven fabric layer (layer I) that comprises a synthetic fiber having a fiber size of 0.1 &#x3bc;m or greater and less than 4.0 &#x3bc;m and a non-woven fabric layer (layer II) that comprises a thermoplastic resin fiber having a fiber size of 4.0-30.0 &#x3bc;m inclusive, and has a weight per area of 3.0 g/mor greater and less than 20.0 g/m.

Separator

The present invention provides a poly(trimethylene terephthalate) pellet comprising 80 wt % or more of trimethylene terephthalate repeating units copolymerized with bis(3-hydroxypropyl) ether at a ratio in a range from 0.01 to 2 wt %, wherein an amount of terminal carboxyl groups is 25 milli-equivalent/kg or less and an intrinsic viscosity is in a range from 0.8 to 2 dl/g, which pellet has an L* value of 75 or more, a b* value in a range from &#x2212;2 to 5, and a weight in a range from 1 to 50 mg/piece.

Poly (trimethylene terephthalate) pellets and method for production thereof

The present invention provides poly(trimethylene terephthalate) copolymerized with ester-forming sulfonate and a fiber thereof. The polymer of the present invention is high in melting point, small in loss of melting viscosity and has a high molecular weight. The fiber of the present invention is high in toughness, excellent in whiteness and dyeable with a cationic dye, whereby it is useful for clothing, carpets or non-woven sheets, etc.

Modified polytrimethylene terephthalate

Composite material and process for production of same

Growing community of inventors

Tokyo, Japan

Shinichi Okajima