Asahi Kasei Kabushiki Kaisha

Asahi Kasei Fibers Corporation

Ryu Taniguchi

Jinichiro Kato

Toru Morita

Takashi Komatsu

There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20 ppm, terminal structures include an alkyl ester group (terminal group A) and an alkyl ketone group (terminal group B), and the equivalent ratio of terminal group A/terminal group B is 0.1-8.0. The polyketone of the present invention can be used in any forms, such as fibers and films, and can be applied to a wide variety of the uses such as clothing, reinforcing materials for rubbers, resins, cements, and optical fibers, electronic materials, battery materials, civil engineering materials, medical materials, daily commodities, fishery materials, and packaging materials.

Polyketone and method for producing the same

Disclosed are polyketone fibers which contain a ketone unit represented by &#x2014;CHCH&#x2014;CO&#x2014; as a main repeating unit, and have an intrinsic viscosity of not less than 0.5 dl/g, a crystal orientation of not less than 90%, a density of not less than 1.300 g/cm, an elastic modulus of not less than 200 cN/dtex, and a heat shrinkage of &#x2212;1 to 3%. The polyketone fibers are high in strength and elastic modulus, and excellent in fatigue resistance, processability, heat resistance, dimensional stability, and, besides, adhesion, and, therefore, can be applied to the fields which require high fatigue resistance, such as tire cords, belts, hoses, ropes, etc.

Polyketone fiber and process for producing the same

Disclosed are polyketone fibers which contain a ketone unit represented by &mdash;CH CH &mdash;CO&mdash; as a main repeating unit, and have an intrinsic viscosity of not less than 0.5 dl/g, a crystal orientation of not less than 90%, a density of not less than 1.300 g/cm , an elastic modulus of not less than 200 cN/dtex, and a heat shrinkage of &minus;1 to 3%. The polyketone fibers are high in strength and elastic modulus, and excellent in fatigue resistance, processability, heat resistance, dimensional stability, and, besides, adhesion, and, therefore, can be applied to the fields which require high fatigue resistance, such as tire cords, belts, hoses, ropes, etc.

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Nobeoka, Japan

Ryu Taniguchi