Patents by Inventor Norihito Sakai
Norihito Sakai 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: 11955858Abstract: A first portion of an insulator is provided on a first region of an end surface of a tooth. A second portion of the insulator is provided on a second region of the end surface of the tooth so as to be separated from the first portion in a circumferential direction. A third portion of the insulator is connected to fourth side ends of the first portion and the second portion in a radial direction. A coil includes a crossing portion in a coil end. A stator includes an insert body in a housing space. The insert is made of a material having a higher thermal conductivity than a material forming the insulator.Type: GrantFiled: November 21, 2019Date of Patent: April 9, 2024Assignee: TOP CO., LTD.Inventors: Yuji Amaya, Norihito Shimode, Yuga Hashizume, Takao Sakai, Kenji Sasaki
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Publication number: 20230182401Abstract: Provided is a support material for fused deposition modeling capable of being supplied in the form of filament excellent in flexibility and uniformity of wire diameter. The support material comprises a polyvinyl alcohol-based resin (A) and a polylactone (B) having a specific molecular weight in a specific content. The filamentous support material is excellent in productivity. Moreover, the support material portion after the fused deposition modeling can be removed by washing by use of water. The resulting waste liquid is biodegradable and thus the support material is environmentally friendly.Type: ApplicationFiled: January 18, 2023Publication date: June 15, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Junki FUKUDA, Norihito SAKAI
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Publication number: 20230147740Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.Type: ApplicationFiled: December 29, 2022Publication date: May 11, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Kazutoshi TSUJI, Norihito SAKAI, Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
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Patent number: 11597870Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.Type: GrantFiled: February 5, 2020Date of Patent: March 7, 2023Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Kazutoshi Tsuji, Norihito Sakai, Tomoya Fujita, Takahiro Saka, Chizuko Furo
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Publication number: 20230023495Abstract: Disclosed is a support material for a fused deposition modeling. The support material has excellent adhesion to a variety of model materials and is easily dissolved and removed by washing with water. Also, the waste liquid (PVA-based aqueous solution) generated after the washing operation may be allowed to be drained as it is, in compliance with environmental regulations. The support material comprises (A) PVA-based resin having a group containing sulfonic acid or a salt thereof and (B) biodegradable polyester. The (A) PVA-based resin having a group containing sulfonic acid or a salt thereof and (B) biodegradable polyester have a sea-island structure in which one is dispersed in the other as a matrix.Type: ApplicationFiled: September 14, 2022Publication date: January 26, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventor: Norihito SAKAI
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Publication number: 20230002519Abstract: A method for producing a polyvinyl alcohol resin having an absorbance of not less than 0.2 at 280 nm, which includes: melt-kneading a polyvinyl alcohol resin material; extruding the resulting melt-kneaded polyvinyl alcohol resin into a sheet; cooling the resulting polyvinyl alcohol resin sheet; and pulverizing the cooled polyvinyl alcohol resin sheet. The method ensures a higher productivity and an excellent long-run property.Type: ApplicationFiled: September 7, 2022Publication date: January 5, 2023Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Yoshihito YAMAUCHI, Norihito SAKAI
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Publication number: 20220281161Abstract: A support material used for fused deposition modeling for producing a target three-dimensional object, a fused deposition modeled structure and a method of manufacturing a three-dimensional structure using the same are provided. The support material comprises a polyvinyl alcohol-based resin modified with a hetero functional group, preferably having a hydroxyl group at the terminal. The support material is preferably filamentous. The support material structure can be removed by washing with water from a produced fused deposition modeled structure to obtain a target three-dimensional object. The wastewater generated in the production is environmentally friendly and therefore may be allowed to discharge.Type: ApplicationFiled: May 24, 2022Publication date: September 8, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Norihito SAKAI, Tomotake YANO
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Publication number: 20220010128Abstract: As a molded article that has gas barrier properties even if a gas barrier layer is not provided and that also has molding stability and biodegradability, there is proposed a molded article containing an aliphatic polyester-based resin (A) and a polyvinyl alcohol-based resin (B) as main component resins, wherein the molded article has a resin phase-separated structure having a continuous phase including the aliphatic polyester-based resin (A) as a main component, and a ribbon-like dispersed phase including the polyvinyl alcohol-based resin (B) as a main component.Type: ApplicationFiled: September 27, 2021Publication date: January 13, 2022Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Yuya KANAMORI, Norihito SAKAI
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Publication number: 20210206965Abstract: An object of the present invention is to provide a resin composition which is capable of melt molding multiple times and thus has excellent recyclability. The resin composition of the present invention contains a polylactic acid (A), an acid-modified aliphatic polyester-based resin (B) and a polyvinyl alcohol-based resin (C), in which a content of the acid-modified aliphatic polyester-based resin (B) is 0.3 to 15 parts by weight with respect to 100 parts by weight of the polylactic acid (A) and a content of the polyvinyl alcohol-based resin (C) is 0.3 to 10 parts by weight with respect to 100 parts by weight.Type: ApplicationFiled: March 24, 2021Publication date: July 8, 2021Applicant: Mitsubishi Chemical CorporationInventors: Hiroto MISAWA, Yuya KANAMORI, Norihito SAKAI
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Publication number: 20210139688Abstract: The present invention aims to provide a fused deposition modeling type additive manufacturing material which has flexibility when molded into a filamentous material such as a filament, and can exhibit an excellent manufacturing property when additive manufacturing is performed using a molded product thereof, and the fused deposition modeling type additive manufacturing material according to the present invention contains: a polyvinyl alcohol-based resin; a polyethylene glycol having a weight average molecular weight of 200 to 1,000; and a carboxylic acid metal salt in an amount of 0.8 mass % or less with respect to the polyvinyl alcohol-based resin.Type: ApplicationFiled: January 21, 2021Publication date: May 13, 2021Applicant: Mitsubishi Chemical CorporationInventor: Norihito SAKAI
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Patent number: 10815039Abstract: A packaging bag for packaging a melt-processable polyvinyl alcohol resin is formed from a film having a methanol vapor transmission rate of 0.5 to 1000 g/m2·day. A method of storing a melt-processable polyvinyl alcohol resin includes the step of sealingly packaging melt-processable polyvinyl alcohol resin particles with the use of the packaging bag formed from the aforementioned film. Where the melt-processable polyvinyl alcohol resin is packaged with the use of the packaging bag, therefore, an organic solvent remaining in the packaged polyvinyl alcohol resin can be released in the form of vapor to the outside through the packaging bag to dissipate, whereby the resulting polyvinyl alcohol resin has a reduced organic solvent concentration after storage thereof in the packaging bag. As a result, the melt-processable polyvinyl alcohol resin is improved in forming stability.Type: GrantFiled: December 7, 2016Date of Patent: October 27, 2020Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Yoshihito Yamauchi, Norihito Sakai
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Patent number: 10807353Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.Type: GrantFiled: July 25, 2019Date of Patent: October 20, 2020Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Norihito Sakai, Shusaku Mandai
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Publication number: 20200172796Abstract: A problem to be solved of the present invention is to provide a diverting agent which gradually dissolves in water. The present invention relates to a diverting agent containing a polyvinyl alcohol-based resin and a method of filling a fracture using the diverting agent.Type: ApplicationFiled: February 5, 2020Publication date: June 4, 2020Applicant: Mitsubishi Chemical CorporationInventors: Kazutoshi TSUJI, Norihito SAKAI, Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
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Patent number: 10632731Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.Type: GrantFiled: March 1, 2019Date of Patent: April 28, 2020Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Norihito Sakai, Shusaku Mandai
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Publication number: 20200087465Abstract: An object of the present invention is to provide polyvinyl alcohol resin composition pellets in which coloring is small and hardness characteristics are improved. The present invention relates to polyvinyl alcohol resin composition pellets, which comprise a polyvinyl alcohol resin, and have hardness of 100 N or more at 23° C. and 50% RH, and a yellow index value of 50 or less after being heated at 210° C. and pressed at 5 kgf/cm2 for two minutes.Type: ApplicationFiled: November 25, 2019Publication date: March 19, 2020Applicant: Mitsubishi Chemical CorporationInventors: Yuya FUKAMACHI, Norihito SAKAI
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Publication number: 20190344553Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.Type: ApplicationFiled: July 25, 2019Publication date: November 14, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Norihito SAKAI, Shusaku MANDAI
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Publication number: 20190291339Abstract: The present invention provides a molding material excellent in dimensional stability and operation safety during surface treatment after molding. The molding material according to the present invention is for use in molding by a hot melt lamination method and contains an ethylene-vinyl alcohol copolymer.Type: ApplicationFiled: June 14, 2019Publication date: September 26, 2019Applicant: Mitsubishi Chemical CorporationInventors: Norihito SAKAI, Kenji Kato
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Publication number: 20190211200Abstract: A resin composition contains: (A) a polyvinyl alcohol resin; and (B) a block copolymer having a polymer block (b1) of an aromatic vinyl compound, and at least one of a polymer block (b2) of a conjugated diene compound or isobutylene and a hydrogenation block (b3) resulting from hydrogenation of the conjugated diene compound or isobutylene; wherein the polymer block (b1) of the aromatic vinyl compound is present in a proportion of not less than 10 wt. % based on the total amount of the polyvinyl alcohol resin (A) and the block copolymer (B).Type: ApplicationFiled: March 14, 2019Publication date: July 11, 2019Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.Inventors: Norihito SAKAI, Yuya FUKAMACHI
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Publication number: 20190193387Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.Type: ApplicationFiled: March 1, 2019Publication date: June 27, 2019Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.Inventors: Norihito SAKAI, Shusaku MANDAI
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Publication number: 20180346214Abstract: A packaging bag for packaging a melt-processable polyvinyl alcohol resin is formed from a film having a methanol vapor transmission rate of 0.5 to 1000 g/m2·day. A method of storing a melt-processable polyvinyl alcohol resin includes the step of sealingly packaging melt-processable polyvinyl alcohol resin particles with the use of the packaging bag formed from the aforementioned film. Where the melt-processable polyvinyl alcohol resin is packaged with the use of the packaging bag, therefore, an organic solvent remaining in the packaged polyvinyl alcohol resin can be released in the form of vapor to the outside through the packaging bag to dissipate, whereby the resulting polyvinyl alcohol resin has a reduced organic solvent concentration after storage thereof in the packaging bag. As a result, the melt-processable polyvinyl alcohol resin is improved in forming stability.Type: ApplicationFiled: December 7, 2016Publication date: December 6, 2018Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.Inventors: Yoshihito YAMAUCHI, Norihito SAKAI