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).

  • Publication number: 20230182401
    Abstract: 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: Application
    Filed: January 18, 2023
    Publication date: June 15, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Junki FUKUDA, Norihito SAKAI
  • Publication number: 20230147740
    Abstract: 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: Application
    Filed: December 29, 2022
    Publication date: May 11, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Kazutoshi TSUJI, Norihito SAKAI, Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
  • Patent number: 11597870
    Abstract: 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: Grant
    Filed: February 5, 2020
    Date of Patent: March 7, 2023
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Kazutoshi Tsuji, Norihito Sakai, Tomoya Fujita, Takahiro Saka, Chizuko Furo
  • Publication number: 20230023495
    Abstract: 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: Application
    Filed: September 14, 2022
    Publication date: January 26, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Norihito SAKAI
  • Publication number: 20230002519
    Abstract: 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: Application
    Filed: September 7, 2022
    Publication date: January 5, 2023
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yoshihito YAMAUCHI, Norihito SAKAI
  • Publication number: 20220281161
    Abstract: 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: Application
    Filed: May 24, 2022
    Publication date: September 8, 2022
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito SAKAI, Tomotake YANO
  • Publication number: 20220010128
    Abstract: 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: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yuya KANAMORI, Norihito SAKAI
  • Publication number: 20210206965
    Abstract: 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: Application
    Filed: March 24, 2021
    Publication date: July 8, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Hiroto MISAWA, Yuya KANAMORI, Norihito SAKAI
  • Publication number: 20210139688
    Abstract: 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: Application
    Filed: January 21, 2021
    Publication date: May 13, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventor: Norihito SAKAI
  • Patent number: 10815039
    Abstract: 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: Grant
    Filed: December 7, 2016
    Date of Patent: October 27, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yoshihito Yamauchi, Norihito Sakai
  • Patent number: 10807353
    Abstract: 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: Grant
    Filed: July 25, 2019
    Date of Patent: October 20, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito Sakai, Shusaku Mandai
  • Publication number: 20200172796
    Abstract: 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: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kazutoshi TSUJI, Norihito SAKAI, Tomoya FUJITA, Takahiro SAKA, Chizuko FURO
  • Patent number: 10632731
    Abstract: 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: Grant
    Filed: March 1, 2019
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito Sakai, Shusaku Mandai
  • Publication number: 20200087465
    Abstract: 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: Application
    Filed: November 25, 2019
    Publication date: March 19, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yuya FUKAMACHI, Norihito SAKAI
  • Publication number: 20190344553
    Abstract: 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: Application
    Filed: July 25, 2019
    Publication date: November 14, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito SAKAI, Shusaku MANDAI
  • Publication number: 20190291339
    Abstract: 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: Application
    Filed: June 14, 2019
    Publication date: September 26, 2019
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Norihito SAKAI, Kenji Kato
  • Publication number: 20190211200
    Abstract: 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: Application
    Filed: March 14, 2019
    Publication date: July 11, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norihito SAKAI, Yuya FUKAMACHI
  • Publication number: 20190193387
    Abstract: 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: Application
    Filed: March 1, 2019
    Publication date: June 27, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norihito SAKAI, Shusaku MANDAI
  • Publication number: 20180346214
    Abstract: 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: Application
    Filed: December 7, 2016
    Publication date: December 6, 2018
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Yoshihito YAMAUCHI, Norihito SAKAI
  • Patent number: 9624347
    Abstract: The present invention provides the resin composition having excellent inflation moldability by which a film having high water vapor transmission rate (WVTR) and low elastic modulus can be produced, and a film which is formed from the resin composition. The present invention relates to a resin composition comprising a polyamide resin (A) and a polyvinyl alcohol-based resin (B) which includes 2-10% by mole of structural unit represented by the following general formula (1) and has a degree of saponification of 70-90% by mole, and a film which is formed from the resin composition. [In the formula, R1 to R6 each independently represent a hydrogen atom or an organic group, and X represents a single bond or a linking chain.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: April 18, 2017
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norihito Sakai, Kaoru Inoue