Patents by Inventor Hirotoshi Kakuta
Hirotoshi Kakuta 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: 20240042743Abstract: A polyethylene-based resin multilayer foam sheet may include a polyethylene-based resin foam layer containing a polyethylene-based resin (A) as a base resin, and a conductive layer laminated on at least one side of the foam layer. The conductive layer contains: a mixed resin of one or more polyethylenes (B) of low-density polyethylenes and/or linear low-density polyethylenes and an ethylene-based copolymer (C) having a structural unit derived from ethylene and a structural unit derived from a monomer having a polar group; and conductive carbon. The conductive carbon blended in the conductive layer may be in a range of from 3 to 15 wt. %. The difference, TmB?TmC, between the melting point TmB of the polyethylene (B) and the melting point TmC of the ethylene-based copolymer (C) each contained in the conductive layer may be in a range of from 30 to 80° C.Type: ApplicationFiled: October 1, 2021Publication date: February 8, 2024Applicant: JSP CORPORATIONInventors: Hirotoshi KAKUTA, Mikidai FUJITA, Naoya KATSUYAMA
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Patent number: 11633942Abstract: A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.Type: GrantFiled: September 30, 2021Date of Patent: April 25, 2023Assignee: JSP CORPORATIONInventors: Ryuichi Taniguchi, Hirotoshi Kakuta, Takashi Ori
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Patent number: 11273621Abstract: A laminated foam sheet having a polyethylene resin foam layer and an outer layer laminated on each side of the foam layer, each outer layer being composed of an outermost surface polyethylene resin layer and an intermediate polyethylene resin layer which is positioned between the outermost surface layer and the foam layer and which contains a specific amount of a polymeric antistatic agent relative to the weight of the intermediate layer and to the basis weight of each of the intermediate layer and outermost surface layer.Type: GrantFiled: December 31, 2019Date of Patent: March 15, 2022Assignee: JSP CORPORATIONInventors: Ryuichi Taniguchi, Hirotoshi Kakuta
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Publication number: 20220016873Abstract: A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.Type: ApplicationFiled: September 30, 2021Publication date: January 20, 2022Applicant: JSP CORPORATIONInventors: Ryuichi TANIGUCHI, Hirotoshi KAKUTA, Takashi ORI
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Patent number: 11161328Abstract: A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.Type: GrantFiled: January 13, 2020Date of Patent: November 2, 2021Assignee: JSP CORPORATIONInventors: Ryuichi Taniguchi, Hirotoshi Kakuta, Takashi Ori
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Publication number: 20200269542Abstract: A laminated foam sheet having a polyethylene resin foam layer and an outer layer laminated on each side of the foam layer, each outer layer being composed of an outermost surface polyethylene resin layer and an intermediate polyethylene resin layer which is positioned between the outermost surface layer and the foam layer and which contains a specific amount of a polymeric antistatic agent relative to the weight of the intermediate layer and to the basis weight of each of the intermediate layer and outermost surface layer.Type: ApplicationFiled: December 31, 2019Publication date: August 27, 2020Applicant: JSP CORPORATIONInventors: Ryuichi TANIGUCHI, Hirotoshi KAKUTA
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Publication number: 20200247094Abstract: A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.Type: ApplicationFiled: January 13, 2020Publication date: August 6, 2020Applicant: JSP CORPORATIONInventors: Ryuichi TANIGUCHI, Hirotoshi KAKUTA, Takashi ORI
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Patent number: 9701098Abstract: A polyethylene-based resin foam sheet with density of 15 to 150 kg/m3, including a foam layer containing, as a base resin, polyethylene-based resin, and antistatic layer which is lamination bonded to at least one side of the foam layer containing a polymeric antistatic agent and, as base resin, polyethylene-based resin, wherein polymeric antistatic agent melting point of 125 to 140° C. and ratio of its partial heat of fusion in a region above melting point to its total heat of fusion of 40% or lower, wherein antistatic layer contains the polymeric antistatic agent of 45 to 300 parts by mass based on 100 parts by mass of the polyethylene-based resin constituting the antistatic layer, wherein antistatic layer has a weight of 1 to 50 g/m2, and antistatic layer shows initial electrostatic potential of 50 V or lower when a voltage of 10 kV is applied to a surface for 30 seconds.Type: GrantFiled: August 23, 2013Date of Patent: July 11, 2017Assignee: JSP CORPORATIONInventors: Kazuhiko Morita, Hirotoshi Kakuta, Ryuichi Taniguchi
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Patent number: 9592642Abstract: A method for producing a multi-layer foam sheet having a foam layer and a resin layer laminated on at least one side of the foam layer, includes coextruding a foamable molten resin composition which contains a low density polyethylene and a physical blowing agent and a molten resin composition which contains 80 to 20% by weight of a specific ethylene-propylene random copolymer and 20 to 80% by weight of a specific polyethylene resin so that the foamable molten resin composition forms the foam layer and the molten resin composition forms the resin layer.Type: GrantFiled: August 23, 2013Date of Patent: March 14, 2017Assignee: JSP CORPORATIONInventors: Kazuhiko Morita, Hirotoshi Kakuta, Ryuichi Taniguchi
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Publication number: 20160288464Abstract: There is provided a polyethylene-based resin foam sheet with an appearance density of 90 to 600 kg/m3, including: a polyethylene-based resin foam layer; and a polyolefin-based resin layer laminated on at least one side of the polyethylene-based resin foam layer by coextrusion, wherein the polyolefin-based resin layer comprises a mixture of a polypropylene-based resin with a melting point of 135° C. or lower produced using a metallocene catalyst and a polyethylene-based resin, and wherein the polyolefin-based resin layer has a sea-island structure formed on the interface side with the polyethylene-based resin foam layer and a sea-sea structure formed on the surface side of the polyolefin-based resin layer, the sea-island structure having a continuous phase of the polyethylene-based resin and a dispersion phase of the polypropylene-based resin, and the sea-sea structure having a co-continuous phase of the polyethylene-based resin and the polypropylene-based resin.Type: ApplicationFiled: March 30, 2016Publication date: October 6, 2016Applicant: JSP CORPORATIONInventors: Kazuhiko MORITA, Hirotoshi KAKUTA, Ryuichi TANIGUCHI
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Publication number: 20150224745Abstract: A polyethylene-based resin foam sheet with density of 15 to 150 kg/m3, including a foam layer containing, as a base resin, polyethylene-based resin, and antistatic layer which is lamination bonded to at least one side of the foam layer containing a polymeric antistatic agent and, as base resin, polyethylene-based resin, wherein polymeric antistatic agent melting point of 125 to 140° C. and ratio of its partial heat of fusion in a region above melting point to its total heat of fusion of 40% or lower, wherein antistatic layer contains the polymeric antistatic agent of 45 to 300 parts by mass based on 100 parts by mass of the polyethylene-based resin constituting the antistatic layer, wherein antistatic layer has a weight of 1 to 50 g/m2, and antistatic layer shows initial electrostatic potential of 50 V or lower when a voltage of 10 kV is applied to a surface for 30 seconds.Type: ApplicationFiled: August 23, 2013Publication date: August 13, 2015Inventors: Kazuhiko Morita, Hirotoshi Kakuta, Ryuichi Taniguchi
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Publication number: 20140070442Abstract: A method for producing a multi-layer foam sheet having a foam layer and a resin layer laminated on at least one side of the foam layer, includes coextruding a foamable molten resin composition which contains a low density polyethylene and a physical blowing agent and a molten resin composition which contains 80 to 20% by weight of a specific ethylene-propylene random copolymer and 20 to 80% by weight of a specific polyethylene resin so that the foamable molten resin composition forms the foam layer and the molten resin composition forms the resin layer.Type: ApplicationFiled: August 23, 2013Publication date: March 13, 2014Applicant: JSP CorporationInventors: Kazuhiko MORITA, Hirotoshi KAKUTA, Ryuichi TANIGUCHI
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Patent number: 6986941Abstract: The present invention relates to a sheet or board like multiple layers laminated polyolefin foam having a plurality of polyolefin layers laminated on at least one side of a polyolefin foam by a coextrusion method. More specifically, the present invention relates to said multiple layers laminated polyolefin foam, wherein the thickness of the outermost layer constituting the plurality of polyolefin layers is 5 to 80 ?m, and the density d (g/L) of the polyolefin foam, the melt flow rate X (g/10 min) of the polyolefin constituting the innermost layer among the plurality of polyolefin layers, and the thickness Y (?m) of the innermost layer of the multiple polyolefin layers satisfy the following relationships (1) to (4). Y?0.Type: GrantFiled: November 30, 2001Date of Patent: January 17, 2006Assignee: JSP CorporationInventors: Kazuhiko Morita, Takashi Muroi, Hirotoshi Kakuta
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Publication number: 20030104197Abstract: The present invention relates to a sheet or board like multiple layers laminated polyolefin foam having a plurality of polyolefin layers laminated on at least one side of a polyolefin foam by a coextrusion method. More specifically, the present invention relates to said multiple layers laminated polyolefin foam, wherein the thickness of the outermost layer constituting the plurality of polyolefin layers is 5 to 80 &mgr;m, and the density d (g/L) of the polyolefin foam, the melt flow rate × (g/10 min) of the polyolefin constituting the innermost layer among the plurality of polyolefin layers, and the thickness Y (&mgr;m) of the innermost layer of the multiple polyolefin layers satisfy the following relationships (1) to (4).Type: ApplicationFiled: November 30, 2001Publication date: June 5, 2003Applicant: JSP CORPORATIONInventors: Kazuhiko Morita, Takashi Muroi, Hirotoshi Kakuta
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Patent number: 6543573Abstract: The present invention provides a speaker unit comprising a diaphragm of 0.5 to 10 mm thick aromatic polycarbonate with a density of 0.03 to 0.6 g/cm3, and a mechanism for driving the diaphragm. The aromatic polycarbonate used for the diaphragm is preferably derived from bisphenol with a viscosity average molecular weight of 25,000 to 70,000. The invention further provides a speaker system comprising such a speaker unit attached to a cabinet and a method for manufacturing the speaker diaphragm.Type: GrantFiled: December 7, 2000Date of Patent: April 8, 2003Assignee: JSP CorporationInventors: Yoshihisa Ishihara, Takeshi Aoki, Satoshi Iwasaki, Hirotoshi Kakuta
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Publication number: 20010050194Abstract: The present invention provides a speaker unit comprising a diaphragm of 0.5 to 10 mm thick aromatic polycarbonate with a density of 0.03 to 0.6 g/cm3, and a mechanism for driving the diaphragm. The aromatic polycarbonate used for the diaphragm is preferably derived from bisphenol with a viscosity average molecular weight of 25,000 to 70,000. The invention further provides a speaker system comprising such a speaker unit attached to a cabinet and a method for manufacturing the speaker diaphragm.Type: ApplicationFiled: December 7, 2000Publication date: December 13, 2001Applicant: JSP CORPORATIONInventors: Yoshihisa Ishihara, Takeshi Aoki, Satoshi Iwasaki, Hirotoshi Kakuta
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Patent number: 5830902Abstract: A quinuclidine derivative represented by the following general formula (I), a pharmaceutically acceptable salt thereof, a hydrate thereof or a solvate thereof, which has strong squalene synthase inhibiting activity and is useful as a cholesterol lowering agent without causing side effects. ##STR1## (Symbols in the formula represent the following meanings; R.sub.1 : a hydrogen atom, a halogen atom or a lower alkyl group,R.sub.2 : a hydrogen atom, a hydroxyl group or a lower alkoxy group,. . : a single bond or a double bond, with the proviso thatR.sub.2 does not exist when . . . is a double bond,X and Y: the same or different from each other and each represents a bond, an oxygen atom (--O--), a carbonyl group (--CO--), a group represented by the formula --S(O).sub.p -- or a group represented by the formula --NR.sub.3 --,p: 0, 1 or 2,R.sub.3 : a hydrogen atom or a lower alkyl group which may have a substituent,A: a saturated or unsaturated lower alkylene group, a group of the formula --(CH.sub.2).sub.m Z(CH.sub.Type: GrantFiled: August 21, 1997Date of Patent: November 3, 1998Assignee: Yamanouchi Pharmaceutical Co., Ltd.Inventors: Masahiko Isaka, Tsukasa Ishihara, Koyo Matsuda, Hirotoshi Kakuta, Hiroshi Moritani