Patents Assigned to Mitsubishi Paper Mills Limited
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Patent number: 12006634Abstract: An object of the present invention is to provide a paper for total heat exchange element, which has both of the heat transfer property and the moisture permeation property and is also excellent in the gas barrier property, and the present invention relates to a paper for total heat exchange element including a base paper containing a beaten natural pulp and a hygroscopic agent applied to the base paper, wherein a ratio of a fine fraction having a fiber length of 0.05 mm or less in the beaten natural pulp is from 10 to 25%.Type: GrantFiled: March 27, 2019Date of Patent: June 11, 2024Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Yoshiyuki Hamasaki
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Patent number: 11998879Abstract: A semipermeable membrane support containing polyolefin-based fibers, which can withstand repeated washing and backwashing, makes it easy for a semipermeable membrane component to permeate thereinto and difficult for the component to strike therethrough, and is excellent in adhesion to the semipermeable membrane and adhesion between a non-coating surface thereof and a resin frame. The semipermeable membrane support which is used by forming the semipermeable membrane thereon is a wet-laid nonwoven fabric containing core-sheath type conjugate fibers composed of polypropylene as a core component and polyethylene as a sheath component and has a burst strength of 300 to 1,000 kPa, or the Bekk smoothness and 75° mirror surface glossiness of the coating surface on which the semipermeable membrane is to be formed of the semipermeable membrane support being more than the Bekk smoothness and 75° mirror surface glossiness of a non-coating surface on the opposite side.Type: GrantFiled: March 23, 2018Date of Patent: June 4, 2024Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Keisuke Oyama, Yusuke Shimizu, Takahito Ochiai, Takao Masuda
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Publication number: 20240125565Abstract: [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: ApplicationFiled: February 28, 2022Publication date: April 18, 2024Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Kengo Yamane, Kazuya Tsukuda
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Patent number: 11881595Abstract: 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: GrantFiled: September 22, 2022Date of Patent: January 23, 2024Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Makoto Kato, Noriko Kasai, Kukjin Yoon
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Patent number: 11735797Abstract: 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: GrantFiled: January 23, 2019Date of Patent: August 22, 2023Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Tomohiro Sato, Hideaki Saegusa, Makoto Kato, Noriko Kasai, Kukjin Yoon
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Patent number: 11721492Abstract: 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: GrantFiled: March 19, 2020Date of Patent: August 8, 2023Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Keisuke Oyama, Tomohiro Sato
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Publication number: 20230193534Abstract: 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: ApplicationFiled: March 26, 2021Publication date: June 22, 2023Applicant: MITSUBISHI PAPER MILLS LIMITEDInventor: Toshihiro SHIGEMATSU
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Patent number: 11637349Abstract: 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: GrantFiled: September 1, 2017Date of Patent: April 25, 2023Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Toshihiro Shigematsu, Tomohiro Sato, Makoto Kato
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Publication number: 20230035812Abstract: 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: ApplicationFiled: September 22, 2022Publication date: February 2, 2023Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Tomohiro SATO, Hideaki SAEGUSA, Makoto KATO, Noriko KASAI, Kukjin YOON
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Patent number: 11510408Abstract: 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: GrantFiled: June 8, 2018Date of Patent: November 29, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventors: Kakeru Yoshida, Atsushi Matsuzawa, Yukio Tokunaga
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Publication number: 20220361483Abstract: 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: ApplicationFiled: June 3, 2020Publication date: November 17, 2022Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Atsushi Matsuzawa, Kakeru Yoshida
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Patent number: 11480396Abstract: 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: GrantFiled: August 20, 2018Date of Patent: October 25, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Kengo Yamane
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Publication number: 20220287297Abstract: 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: ApplicationFiled: August 5, 2020Publication date: September 15, 2022Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Atsushi Matsuzawa, Kakeru Yoshida
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Publication number: 20220271392Abstract: 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: ApplicationFiled: May 2, 2022Publication date: August 25, 2022Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Toshihiro SHIGEMATSU, Tomohiro SATO, Makoto KATO, Masatoshi KITO, Noriko KASAI, Kukjin YOON, Wakana AIZAWA
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Publication number: 20220158299Abstract: 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: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Applicant: MITSUBISHI PAPER MILLS LIMITEDInventor: Toshihiro SHIGEMATSU
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Patent number: 11335972Abstract: 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: GrantFiled: December 18, 2017Date of Patent: May 17, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Toshihiro Shigematsu
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Patent number: 11313076Abstract: 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: GrantFiled: September 3, 2019Date of Patent: April 26, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Shinichiro Matsumoto
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Publication number: 20220115186Abstract: 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: ApplicationFiled: March 19, 2020Publication date: April 14, 2022Applicant: MITSUBISHI PAPER MILLS LIMITEDInventors: Keisuke OYAMA, Tomohiro SATO
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Patent number: D970746Type: GrantFiled: December 28, 2020Date of Patent: November 22, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Atsushi Matsuzawa
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Patent number: D972162Type: GrantFiled: January 4, 2021Date of Patent: December 6, 2022Assignee: MITSUBISHI PAPER MILLS LIMITEDInventor: Atsushi Matsuzawa