Patents Assigned to Mitsubishi Paper Mills Limited
  • Publication number: 20240125565
    Abstract: [Problem] A problem of the present invention is, in a moisture permeable film for a total heat exchange element, which is a partition plate for constituting a total heat exchange element for a total heat exchanger, to provide a moisture permeable film for a total heat exchange element which is excellent in adhesiveness to a polyolefin microporous film and has high moisture permeability, gas barrier property and moisture resistance. [Solution] The above problem was solved by a moisture permeable film for a total heat exchange element in which a moisture permeable resin layer is provided on at least one surface of a polyolefin microporous film having air resistance of 100 sec or more and moisture permeability of 750 g/m2·24 hr or more.
    Type: Application
    Filed: February 28, 2022
    Publication date: April 18, 2024
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Kengo Yamane, Kazuya Tsukuda
  • Patent number: 11881595
    Abstract: A coating solution for lithium ion battery separators which comprises inorganic particles, an organic polymer binder and carboxymethyl cellulose having an etherification rate of 1.10 to 2.00 or a salt thereof, or a coating solution for lithium ion battery separators comprising inorganic particles containing magnesium hydroxide having a linseed oil absorption of 30 to 80 (g/100 g), and a separator having a coating layer formed from the coating solution on a substrate and high safety and low internal resistance.
    Type: Grant
    Filed: September 22, 2022
    Date of Patent: January 23, 2024
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Makoto Kato, Noriko Kasai, Kukjin Yoon
  • Patent number: 11735797
    Abstract: A coating solution for lithium ion battery separators which comprises inorganic particles, an organic polymer binder and carboxymethyl cellulose having an etherification rate of 1.10 to 2.00 or a salt thereof, or a coating solution for lithium ion battery separators comprising inorganic particles containing magnesium hydroxide having a linseed oil absorption of 30 to 80 (g/100 g), and a separator having a coating layer formed from the coating solution on a substrate and high safety and low internal resistance.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: August 22, 2023
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Tomohiro Sato, Hideaki Saegusa, Makoto Kato, Noriko Kasai, Kukjin Yoon
  • Patent number: 11721492
    Abstract: An object of the present invention is to provide a solid electrolytic capacitor separator configured such that thickness non-uniformity is reduced, internal short-circuit is less likely to occur, an impedance is not too high, and a high heat resistance is exhibited. In a solid electrolytic capacitor separator including non-woven fabric, the non-woven fabric contains fibrillated heat-resistant fibers and synthetic short fibers as essential components, the fiber length of the fibrillated heat-resistant fiber is 0.30 to 0.75 mm, and the percentage of fibrillated heat-resistant fibers with a fiber width of 12 to 40 ?m is equal to or higher than 55% and lower than 75%.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: August 8, 2023
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Keisuke Oyama, Tomohiro Sato
  • Publication number: 20230193534
    Abstract: The present invention provides a non-woven fabric for supporting a solid electrolyte in which heat-fusible composite fibers with a crimp are contained in an amount of not less than 60 mass % and not more than 100 mass % and are heat-fused, and a solid electrolyte sheet. The non-woven fabric for supporting a solid electrolyte is excellent in process performance, is satisfactorily filled with a solid electrolyte, is suitable for achieving a thin solid electrolyte sheet, and has few hole defects. The solid electrolyte sheet is excellent in self-sustainability and flexibility.
    Type: Application
    Filed: March 26, 2021
    Publication date: June 22, 2023
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Toshihiro SHIGEMATSU
  • Patent number: 11637349
    Abstract: It is an object of the present invention to provide a substrate for lithium ion battery separators which has high adhesion to an inorganic particle layer, can be made thin and is excellent in tensile strength and cuttability and a lithium ion battery separator including the substrate for lithium ion battery separators. The substrate for lithium ion battery separators which contains heat-resistant fibers and synthetic resin short fibers contains fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml as the heat-resistant fibers and has a content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml of not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the substrate. The modified freeness is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: April 25, 2023
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Toshihiro Shigematsu, Tomohiro Sato, Makoto Kato
  • Publication number: 20230035812
    Abstract: A coating solution for lithium ion battery separators which comprises inorganic particles, an organic polymer binder and carboxymethyl cellulose having an etherification rate of 1.10 to 2.00 or a salt thereof, or a coating solution for lithium ion battery separators comprising inorganic particles containing magnesium hydroxide having a linseed oil absorption of 30 to 80 (g/100 g), and a separator having a coating layer formed from the coating solution on a substrate and high safety and low internal resistance.
    Type: Application
    Filed: September 22, 2022
    Publication date: February 2, 2023
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Tomohiro SATO, Hideaki SAEGUSA, Makoto KATO, Noriko KASAI, Kukjin YOON
  • Patent number: 11510408
    Abstract: The present invention aims to provide a device for cryopreservation which enables easy and reliable cryopreservation of a cell or tissue. The device for cryopreservation of a cell or tissue of the present invention includes a deposition part on which a cell or tissue is to be deposited together with a preservation solution, wherein a surface of the deposition part includes a protrusion for holding a cell or tissue and a recess for storing a preservation solution.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: November 29, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Kakeru Yoshida, Atsushi Matsuzawa, Yukio Tokunaga
  • Publication number: 20220361483
    Abstract: Provided is a cryopreservation jig fixture including: a base having an upper surface, side surfaces, and a bottom surface; and either a slit on the upper surface of the base or an insertion portion for inserting a cryopreservation jig on the upper surface of the base and a slit having one end opened at a lateral portion of the insertion portion. Also provided is a method of freezing and thawing a cell or tissue, which uses the fixture.
    Type: Application
    Filed: June 3, 2020
    Publication date: November 17, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Atsushi Matsuzawa, Kakeru Yoshida
  • Patent number: 11480396
    Abstract: Total heat exchange element paper having excellent moisture resistance and gas barrier properties, comprising a substrate sheet and a moisture absorbent and colloidal silica both of which are adhered to the substrate sheet, wherein the substrate sheet contains natural pulp which has been beaten to a freeness specified in JIS P 8121-1:2012 of not lower than 80° SR and the colloidal silica is cationic colloidal silica.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: October 25, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Kengo Yamane
  • Publication number: 20220287297
    Abstract: The present invention aims to provide a device for cryopreservation providing excellent working efficiency in operations for freezing and thawing cells or tissues. Provided is a device for cryopreservation off a cell or tissue including at least: a body including a strip-shaped tip; and a cap covering the tip of the body, the tip including at least a deposition part comprising a preservation solution absorber, the tip having a length in a minor axis direction of not shorter than 70% of an inner diameter of the cap, the cap including an inner cavity having a length in a major axis direction of not longer than 200% of a length in a major axis direction of the tip.
    Type: Application
    Filed: August 5, 2020
    Publication date: September 15, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Atsushi Matsuzawa, Kakeru Yoshida
  • Publication number: 20220271392
    Abstract: It is an object of the present invention to provide a substrate for lithium ion battery separators which has high adhesion to an inorganic particle layer, can be made thin and is excellent in tensile strength and cuttability and a lithium ion battery separator including the substrate for lithium ion battery separators. The substrate for lithium ion battery separators which contains heat-resistant fibers and synthetic resin short fibers contains fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml as the heat-resistant fibers and has a content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml of not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the substrate. The modified freeness is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.
    Type: Application
    Filed: May 2, 2022
    Publication date: August 25, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Toshihiro SHIGEMATSU, Tomohiro SATO, Makoto KATO, Masatoshi KITO, Noriko KASAI, Kukjin YOON, Wakana AIZAWA
  • Publication number: 20220158299
    Abstract: It is an object of the present invention to provide a lithium ion battery separator which can be made thin, is excellent in tensile strength and cuttability and has low internal resistance, a low incidence of internal short circuit failure and high cycle characteristics and a lithium ion battery including the separator. In a lithium ion battery separator containing heat-resistant fibers and synthetic resin short fibers, fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml are contained as the heat-resistant fibers, and the content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml is not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the separator. Modified freeness: This is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Toshihiro SHIGEMATSU
  • Patent number: 11335972
    Abstract: It is an object of the present invention to provide a lithium ion battery separator which can be made thin, is excellent in tensile strength and cuttability and has low internal resistance, a low incidence of internal short circuit failure and high cycle characteristics and a lithium ion battery including the separator. In a lithium ion battery separator containing heat-resistant fibers and synthetic resin short fibers, fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml are contained as the heat-resistant fibers, and the content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml is not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the separator. Modified freeness: This is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 17, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Toshihiro Shigematsu
  • Patent number: 11313076
    Abstract: An object of the present invention is to provide a transfer paper which allows smooth removal of a printed transfer paper from a design-printed fabric before steaming; and is unlikely to cause problems such as partial missing, color unevenness, color-development deterioration, etc. of the design on the fabric. Provided is a transfer paper having a substrate and one or more coating layers, the substrate having a base paper and one or more nonaqueous resin layers on one side of the base paper, the one or more coating layers being located on the one or more nonaqueous resin layers, the coating layer located outermost from the substrate, that is, the outermost coating layer, at least comprising a water-soluble polyester resin, a carboxylic acid-modified polyvinyl alcohol resin, an acrylic resin, a starch, and a white pigment, the acrylic resin having a glass transition point (Tg) of 0° C. to 45° C. and a minimum film forming temperature (MFT) of 0° C. to 50° C.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: April 26, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Shinichiro Matsumoto
  • Publication number: 20220115186
    Abstract: An object of the present invention is to provide a solid electrolytic capacitor separator configured such that thickness non-uniformity is reduced, internal short-circuit is less likely to occur, an impedance is not too high, and a high heat resistance is exhibited. In a solid electrolytic capacitor separator including non-woven fabric, the non-woven fabric contains fibrillated heat-resistant fibers and synthetic short fibers as essential components, the fiber length of the fibrillated heat-resistant fiber is 0.30 to 0.75 mm, and the percentage of fibrillated heat-resistant fibers with a fiber width of 12 to 40 ?m is equal to or higher than 55% and lower than 75%.
    Type: Application
    Filed: March 19, 2020
    Publication date: April 14, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Keisuke OYAMA, Tomohiro SATO
  • Publication number: 20220090317
    Abstract: The problem of this invention is to provide a transfer paper with good close contact to fiber materials and good color density of patterns formed on the fiber materials, good peeling, and no significant difference in texture between patterned and non-patterned areas of the fiber materials. The present invention provides a transfer paper having a base material with one or more non-aqueous resin laminate layer(s) on one side of a base paper, and one or more coating layer(s) on the laminate layer(s) of the base material, wherein an outermost coating layer, which is positioned outermost in the coating layer(s) with respect to the base material, contains a white pigment and a binder, the white pigment contains at least an amorphous silica, and the binder contains at least five types consisting of a water-soluble polyester resin, a carboxylic acid-modified polyvinyl alcohol resin, an acrylic resin, a hydroxypropyl starch and an alginate.
    Type: Application
    Filed: February 13, 2020
    Publication date: March 24, 2022
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Akira NAKANO
  • Patent number: 11142620
    Abstract: A photosensitive resin composition which comprises (A) an alkali-soluble resin, (B) a photopolymerization initiator and (C) an acrylate monomer and may further comprise (D) a methacrylate monomer, wherein the acrylate monomer (C) comprises (C1) an acrylate monomer having a double bond equivalent of not less than 250 and (C2) azo acrylate monomer having a double bond equivalent of not more than 150, the content of the methacrylate monomer (D) is 0 to 5 mass %, the content of the acrylate monomer having a double bond equivalent of not less than 250 (C1) is 40 to 60 mass %, and the content of the acrylate monomer having a double bond equivalent of not more than 150 (C2) is 40 to 60 mass % based on the acrylate monomer (C), and the content of the photopolymerization initiator (B) is 0.5 to 1.5 mass % based on the photosensitive resin composition, and an etching method and plating method using the above photosensitive resin composition.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: October 12, 2021
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Munetoshi Irisawa, Kunihito Kajiya, Yuji Toyoda
  • Patent number: D970746
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: November 22, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Atsushi Matsuzawa
  • Patent number: D972162
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: December 6, 2022
    Assignee: MITSUBISHI PAPER MILLS LIMITED
    Inventor: Atsushi Matsuzawa