Patents by Inventor Shizuo Shimizu
Shizuo Shimizu 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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Patent number: 5628844Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.Type: GrantFiled: November 30, 1994Date of Patent: May 13, 1997Assignees: Mitsui Petrochemical Industries, Ltd., Uni-Charm CorporationInventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
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Patent number: 5620712Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.Type: GrantFiled: November 30, 1994Date of Patent: April 15, 1997Assignees: Mitsui Petrochemical Industries, Ltd, Uni-Charm CorporationInventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
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Patent number: 5609703Abstract: In accordance with the present invention, there is provided a process for preparing thermoplastic elastomer laminates which comprises placing a thermoplastic elastomer foamable sheet in an unexpanded state containing a polyolefin resin, an ethylene/.alpha.-olefin copolymer rubber and a foaming agent onto the back of a thermoplastic elastomer sheet containing a polyolefin resin and an ethylene/.alpha.-olefin copolymer rubber, heat fusion bonding both sheets to each other, and heating the resulting laminated sheet to expand the thermoplastic elastomer sheet containing the foaming agent.Type: GrantFiled: March 27, 1995Date of Patent: March 11, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shun-ichi Hamada, Akira Uchiyama, Shizuo Shimizu
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Patent number: 5449352Abstract: A topsheet for use in body fluid absorptive articles is so improved that collapse and clogging of liquid passages therein may be reliably avoided. The topsheet includes an upper sheet, provided with skin-contacting areas and liquid passages, and a lower sheet provided with skin-non-contacting areas, areas welded to the liquid passages, and exposed areas. The exposed areas are welded to each of the liquid passages around lower openings thereof so as to protect the liquid passage against collapse and clogging. The exposed areas define a skin-contacting surface which rises up into each of the liquid passages without extending above the upper surface of the skin-contacting areas. The upper sheet cooperates with the lower sheet to define cavities extending in the direction of the topsheet thickness.Type: GrantFiled: March 21, 1994Date of Patent: September 12, 1995Assignees: Mitsui Petrochemical Industries, Ltd., Uni-Charm CorporationInventors: Kazunari Nishino, Shigeyuki Motomura, Shizuo Shimizu, Takamitsu Igaue, Tsutomu Kido, Hisashi Takai
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Patent number: 5310800Abstract: A partially crosslinked thermoplastic elastomer composition having an excellent heat-bondability is obtained by dynamically heat-treating a peroxide-crosslinking olefin copolymer rubber with an .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof in the presence of an organic peroxide.Type: GrantFiled: March 26, 1992Date of Patent: May 10, 1994Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shizuo Shimizu, Akira Uchiyama, Kunihide Hiraoka, Katsuo Okamoto, Yasuhiko Otawa
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Patent number: 5292811Abstract: Proposed herein is a process for preparing thermoplastic elastomers, which comprises dynamically heat treating polymer particles together with a crosslinking agent, each of the polymer particles being composed of a portion comprising a crystalline olefin polymer and portions comprising an amorphous olefin polymer, the polymer particles having an average particle diameter of at least 10 .mu.m and an apparent bulk density of at least 0.2 g/ml.Type: GrantFiled: March 18, 1993Date of Patent: March 8, 1994Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kazuhiko Murata, Shizuo Shimizu, Mamoru Kioka, Akinori Toyota
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Patent number: 5191005Abstract: Thermoplastic elastomer compositions are prepared by feeding a mixture of (a) a peroxide crosslinking type olefin copolymer rubber, (b) a peroxide decomposition type olefin plastics and optionally, (c) a peroxide non-crosslinking type hydrocarbon rubbery substance through a hopper into a cylinder of an extrusion machine, and feeding simultaneously (d) a mineral oil type softener, or both (d) and (e) silicone oil, through an inlet provided on the cylinder separately from the hopper, thereby dynamically heat treating the resulting mixture in the presence of organic peroxide to prepare a partially crosslinked thermoplastic elastomer composition.Type: GrantFiled: December 13, 1990Date of Patent: March 2, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kazuhiko Murata, Norishige Murakami, Shizuo Shimizu
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Patent number: 5188882Abstract: A multilayered molding is disclosed, which has a base molding outer layer mainly composed of a partial crosslinking type substance A obtained from polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or a mixture B of polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or both. The outermost layer is in direct contact with and forms a lamination with an inner intermediate layer or a base molding composed of a polyethylene resin, for instance, and is firmly bonded to the outermost layer. A method of manufacturing such multilayered molding is also disclosed, in which a composite sheet of the thermoplastic elastomer with or without the intermediate layer is preliminarily heated, followed by being suction held in close contact with a mold cavity inner surface, thus forming a surface layer. The mold is then clamped, and fluidized and plasticized polyolefin resin is injected to produce the molding. The polyolefin resin may also be injected prior to the clamping.Type: GrantFiled: December 10, 1991Date of Patent: February 23, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akira Uchiyama, Naoaki Jimbo, Shizuo Shimizu
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Patent number: 5096652Abstract: A multilayered molding is disclosed, which has a base molding outer layer mainly composed of a partial crosslinking type substance A obtained from polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or a mixture B of polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or both. The outermost layer is in direct contact with and forms a lamination with an inner intermediate layer or a base molding composed of a polyethylene resin, for instance, and is firmly bonded to the outermost layer. A method of manufacturing such multilayered molding is also disclosed, in which a composite sheet of the thermoplastic elastomer with or without the intermediate layer is preliminarily heated, followed by being suction held in close contact with a mold cavity inner surface, thus forming a surface layer. The mold is then clamped, and fluidized and plasticized polyolein resin is injected to produce the molding. The polyolefin resin may also be injected prior to the clamping.Type: GrantFiled: October 4, 1990Date of Patent: March 17, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akira Uchiyama, Naoaki Jimbo, Shizuo Shimizu
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Patent number: 4897298Abstract: A laminate comprising (a) a layer of a partially crosslinked graft-modified polyolefin elastomer formed by dynamically heat-treating a mixture of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide and (b) a layer of a polyamide, polyurethane or polyester is excellent in weatherability, heat resistance and dimension stability, and this laminate is effectively molded into an interior part or sealing material of an automobile, especially a glass run channel. The glass run channel molded from this laminate is excellent in the durability, the tightness of contact with glass at the time of closing and the sliding smoothness at the opening-closing operation.Type: GrantFiled: September 26, 1988Date of Patent: January 30, 1990Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yasuhiko Otawa, Kunihide Hiraoka, Toshiyuki Maeda, Katsuo Okamoto, Noboru Sakamaki, Shizuo Shimizu
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Patent number: 4894289Abstract: A laminate comprising (a) a layer of a partially crosslinked graft-modified polyolefin elastomer formed by dynamically heat-treating a mixture of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide and (b) a layer of a polyamide, polyurethane or polyester is excellent in weatherability, heat resistance and dimension stability, and this laminate is effectively molded into an interior part or sealing material of an automobile, especially a glass run channel. The glass run channel molded from this laminate is excellent in the durability, the tightness of contact with glass at the time of closing and the sliding smoothness at the opening-closing operation.Type: GrantFiled: October 30, 1987Date of Patent: January 16, 1990Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yasuhiko Otawa, Kunihide Hiraoka, Toshiyuki Maeda, Katsuo Okamoto, Noboru Sakamaki, Shizuo Shimizu
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Patent number: 4454092Abstract: A method of producing partially crosslinked rubber-resin composition comprising directly feeding a pelletized peroxide-curable olefin copolymer composition, a peroxide-decomposing polyolefin resin and an organic peroxide compound to a twin-screw extruder under specific extruding conditions of weight of the copolymer rubber and specific energy at extrusion.Type: GrantFiled: August 5, 1982Date of Patent: June 12, 1984Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shizuo Shimizu, Shunji Abe, Akira Matsuda
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Patent number: 4247652Abstract: Dynamically partially cured composition comprising a peroxide-curable olefin copolymer rubber (such as EDPM) and a peroxide-decomposing olefin plastic (such as PE and PP) is improved by effecting the dynamic heat-treatment with addition of a peroxide-non-curable hydrocarbon rubber (such as PIB) and/or a mineral oil softener (process oil). The dynamic heat-treatment is preferably carried out not only in the presence of an organic peroxide but also in the presence of divinyl benzene. The elastomeric composition is thermoplastic and, with or without further blending with an olefin plastic, is processable by techniques conventionally used for thermoplastic resins. This elastomer composition and blends of the elastomer composition and olefin plastic can be used for producing foamed product in combination with decomposition type foaming agent (such as azodicarbonamide).Type: GrantFiled: July 17, 1979Date of Patent: January 27, 1981Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Akira Matsuda, Shizuo Shimizu, Shunji Abe
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Patent number: 4212787Abstract: Dynamically partially cured composition comprising a peroxide-curable olefin copolymer rubber (such as EDPM) and a peroxide-decomposing olefin plastic (such as PE and PP) is improved by effecting the dynamic heat-treatment with addition of a peroxide-non-curable hydrocarbon rubber (such as PIB) and/or a mineral oil softener (process oil). The dynamic heat-treatment is preferably carried out not only in the presence of an organic peroxide but also in the presence of divinyl benzene. The elastomeric composition is thermoplastic and, with or without further blending with an olefin plastic, is processable by techniques conventionally used for thermoplastic resins. This elastomer composition and blends of the elastomer composition and olefin plastic can be used for producing foamed product in combination with decomposition type foaming agent (such as azodicarbonamide).Type: GrantFiled: May 26, 1978Date of Patent: July 15, 1980Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Akira Matsuda, Shizuo Shimizu, Shunji Abe