Patents by Inventor Tsuyoshi Mihayashi
Tsuyoshi Mihayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240279848Abstract: The present invention is directed to an undrawn multifilament including 30 or more individual filaments. In the undrawn multifilament, the individual filaments contain a poly(3-hydroxyalkanoate) resin and a nucleating agent, the mean of the finenesses of the individual filaments is 30 dtex or less, and the coefficient of variation of the finenesses of the individual filaments is 33% or less.Type: ApplicationFiled: August 4, 2022Publication date: August 22, 2024Applicant: KANEKA CORPORATIONInventor: Tsuyoshi MIHAYASHI
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Patent number: 8377352Abstract: A medical catheter tube containing a tetrafluoroethylene polymer, which has a wall thickness of 0.1 mm or below and exhibits a tensile strength (S1) at 1.0 mm displacement of 5.0 N/mm or above; and a process for the production of medical catheter tubes, characterized by molding a composition both a tetrafluoroethylene polymer and a lubricant having high affinity for the polymer by paste extrusion. The invention provides thin-wall medical catheter tubes excellent in elongation resistance, kink resistance and internal cavity lubricity.Type: GrantFiled: March 29, 2011Date of Patent: February 19, 2013Assignee: Kaneka CorporationInventors: Satoshi Inamoto, Fumihiko Nakao, Mitsuharu Korogi, Tsuyoshi Mihayashi
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Patent number: 8057875Abstract: The present invention has its object to provide a resin composition for tubes excellent in balance among wear resistance, flexibility, gas permeation resistance and low resilience (pliability). The object is accomplished by a resin composition for tubes which comprises an isobutylene block copolymer (A) constituted of a polymer block (a) derived from isobutylene as a main constituent and a polymer block (b) derived from a monomer component other than isobutylene as a main constituent, and a thermoplastic polyurethane resin (B).Type: GrantFiled: December 1, 2005Date of Patent: November 15, 2011Assignee: Kaneka CorporationInventors: Kenji Noda, Tsuyoshi Mihayashi, Kazumasa Ohara
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Patent number: 7998124Abstract: The present invention relates to provide a catheter tube having excellent insertability into the body, excellent operability and an excellent anti-thrombogenic property, and also provide a catheter having the tube. For the purpose, a catheter tube of the present invention comprises a mixture of an isobutylene block copolymer and a thermoplastic polyurethane resin, wherein the isobutylene block copolymer is composed of a polymer block mainly comprising isobutylene and a polymer block mainly comprising a monomeric component other than isobutylene; and a catheter using the tube.Type: GrantFiled: May 31, 2007Date of Patent: August 16, 2011Assignee: Kaneka CorporationInventors: Kazumasa Ohara, Tsuyoshi Mihayashi
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Publication number: 20110180955Abstract: A medical catheter tube containing a tetrafluoroethylene polymer, which has a wall thickness of 0.1 mm or below and exhibits a tensile strength (S1) at 1.0 mm displacement of 5.0 N/mm or above; and a process for the production of medical catheter tubes, characterized by molding a composition both a tetrafluoroethylene polymer and a lubricant having high affinity for the polymer by paste extrusion. The invention provides thin-wall medical catheter tubes excellent in elongation resistance, kink resistance and internal cavity lubricity.Type: ApplicationFiled: March 29, 2011Publication date: July 28, 2011Applicant: KANEKA CORPORATIONInventors: Satoshi Inamoto, Fumihiko Nakao, Mitsuharu Korogi, Tsuyoshi Mihayashi
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Publication number: 20110084019Abstract: Provided is a surface showing excellent antithrombotic properties. Also provided is a medical device having the same. An antithrombotic surface comprising polymer layers which are in different charged states and alternately layered, characterized by having three-dimensional peaks and valleys formed thereon. The antithrombotic surface as described above which is further characterized in that the peaks and valleys are 15 nm or more but not more than 200 nm in height and depth respectively. A medical device characterized by being provided with the antithrombotic surface as described above. Thus, a thin and highly antithrombotic surface or medical device can be obtained by a relatively convenient method.Type: ApplicationFiled: March 26, 2009Publication date: April 14, 2011Applicants: KANEKA CORPORATION, SNT CO.Inventors: Seimei Shiratori, Oriha Kuwaki, Jin-Ho Kim, Kohei Fukaya, Tsuyoshi Mihayashi
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Publication number: 20090234329Abstract: A medical catheter tube containing a tetrafluoroethylene polymer, which has a wall thickness of 0.1 mm or below and exhibits a tensile strength (S1) at 1.0 mm displacement of 5.0 N/mm or above; and a process for the production of medical catheter tubes, characterized by molding a composition both a tetrafluoroethylene polymer and a lubricant having high affinity for the polymer by paste extrusion. The invention provides thin-wall medical catheter tubes excellent in elongation resistance, kink resistance and internal cavity lubricity.Type: ApplicationFiled: October 17, 2006Publication date: September 17, 2009Applicant: KANEKA CORPORATIONInventors: Satoshi Inamoto, Fumihiko Nakao, Mitsuharu Korogi, Tsuyoshi Mihayashi
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Publication number: 20090187162Abstract: The present invention relates to provide a catheter tube having excellent insertability into the body, excellent operability and an excellent anti-thrombogenic property, and also provide a catheter having the tube. For the purpose, a catheter tube of the present invention comprises a mixture of an isobutylene block copolymer and a thermoplastic polyurethane resin, wherein the isobutylene block copolymer is composed of a polymer block mainly comprising isobutylene and a polymer block mainly comprising a monomeric component other than isobutylene; and a catheter using the tube.Type: ApplicationFiled: May 31, 2007Publication date: July 23, 2009Applicant: KANEKA CORPORATIONInventors: Kazumasa Ohara, Tsuyoshi Mihayashi
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Publication number: 20090087607Abstract: The present invention has its object to provide a resin composition for tubes excellent in balance among wear resistance, flexibility, gas permeation resistance and low resilience (pliability). The object is accomplished by a resin composition for tubes which comprises an isobutylene block copolymer (A) constituted of a polymer block (a) derived from isobutylene as the constituent and a polymer block (b) derived from a monomer component other than isobutylene, and a thermoplastic polyurethane resin (B).Type: ApplicationFiled: December 1, 2005Publication date: April 2, 2009Applicant: KANEKA CORPORATIONInventors: Kenji Noda, Tsuyoshi Mihayashi, Kazumasa Ohara
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Publication number: 20090012500Abstract: The medical catheter tube of the present invention integrally has an inner layer tube; reinforcement material layers formed by placing element wires on the inner layer tube; a marker; and an outer layer tube. The element wires, which are first and the other element wires, for forming the reinforcement material layers are synthetic resin element wires and/or metallic element wires, the first element wires are placed in the axis direction of the catheter to form the first reinforcement material layer, and the other element wires are wound in a coil form on the first reinforcement material layer, in the circumferential direction of the catheter, to cover the first reinforcement material layer. The marker is flexible to deformation. Because of the presence of the reinforcement material layer and the outer layer tube, flexural rigidity from a base section to a head section is reduced in a stepped or continuous manner.Type: ApplicationFiled: February 6, 2006Publication date: January 8, 2009Applicants: KANEKA CORPORATION, KANEKA MEDIX CORPORATIONInventors: Takahiro Murata, Tsuyoshi Mihayashi, Atsushi Ogawa, Takeshi Kikuchi
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Patent number: 6596782Abstract: A water-containing polyolefin resin composition containing a polyolefin resin and a hydrophilic polymer and having a water content of 1 to 50% by weight which is suitable for use in preparation of polyolefin resin pre-expanded particles, and pre-expanded particles of a polyolefin resin prepared by pre-expanding the water-containing polyolefin resin composition the particles having a an apparent expansion ratio of 5 to 60, a closed cell ratio of 80 to 100% and an average cell diameter of 50 to 500 &mgr;m.Type: GrantFiled: September 25, 1998Date of Patent: July 22, 2003Assignee: Kaneka CorporationInventors: Kenji Mogami, Tsuyoshi Mihayashi, Kyoichi Nakamura, Naruhiko Akamatsu
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Patent number: 6326409Abstract: The object of the present invention is to provide an in-mold foaming article of a propylene resin composition having improved productivity and stable quality in internal molding, and simultaneously a compressive strength and a tensile strength thereof at high density range are improved at the same time. The in-mold foaming article is obtained by using a pre-foamed particle having a density of 90 to 300 g/L and an open cell ratio of at most 12%, wherein the pre-foamed particle comprises a resin composition having (A) 100 parts by weight of a polypropylene resin and (B) 0.01 to 20 parts by weight of a hydrophilic polymer as a base material resin, and water as a foaming agent, the pre-foamed particle having at least two endothermic peaks in a DSC curve obtained in differential scanning calorimetry.Type: GrantFiled: October 24, 2000Date of Patent: December 4, 2001Assignee: Kaneka CorporationInventors: Tsuyoshi Mihayashi, Yutaka Yanagihara, Takayuki Goda
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Patent number: 6273347Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.Type: GrantFiled: August 21, 2000Date of Patent: August 14, 2001Assignee: Kaneka CorporationInventors: Tsuyoshi Mihayashi, Nobuhisa Ota, Naruhiko Akamatsu, Yutaka Yanagihara, Takeshi Satoh
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Patent number: 6130266Abstract: There is provided pre-expanded particles of a propylene resin having a high expansion ratio and excellent molding adhesion without using a volatile blowing agent or increasing an expansion pressure. The pre-expanded particles of a propylene resin are prepared by the process comprising dispersing resin particles comprising a propylene resin composition, which contains 100 parts by weight of (A) a random copolymer of ethylene and propylene having an ethylene content of 1.5 to 4.5% by weight and 0.Type: GrantFiled: February 1, 2000Date of Patent: October 10, 2000Assignee: Kaneka CorporationInventors: Tsuyoshi Mihayashi, Nobuhisa Ota, Naruhiko Akamatsu, Yutaka Yanagihara, Takeshi Satoh
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Patent number: 5883141Abstract: A process for preparing polyolefin resin pre-expanded particles comprising imparting expandability to polyolefin resin expanded particles having a crystal structure which shows two melting points in a DSC curve and heat expanding expanded particles having expandability, in which the relation between heat expansion temperature and the amount of a fusion preventing agent being attached to the surface of the polyolefin resin expanded particles is represented by the inequality: t-T.sub.V .ltoreq.49.1C-27.0 (t is heat expansion temperature, C is the amount of the fusion preventing agent being attached to the surface of the polyolefin resin expanded particles and T.sub.V is saddle temperature between two peaks showing two respective melting points in the DSC curve), and t is within the temperature range represented by the inequality: T.sub.L -30.ltoreq.t.ltoreq.T.sub.V (T.sub.V is the same as defined above and T.sub.L is lower melting point of the two melting points).Type: GrantFiled: March 23, 1998Date of Patent: March 16, 1999Assignee: Kaneka CorporationInventors: Tsuyoshi Mihayashi, Hideshi Ito