Patents by Inventor Rika KURATANI
Rika KURATANI 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: 20240332745Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and a filler, in which a volume ratio of the filler in the adhesive porous layer excluding pores is from 30% by volume to 67% by volume, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.Type: ApplicationFiled: July 15, 2022Publication date: October 3, 2024Applicant: TEIJIN LIMITEDInventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
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Publication number: 20240322377Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and a filler, in which the porous substrate contains a fluorine atom, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.Type: ApplicationFiled: July 15, 2022Publication date: September 26, 2024Applicant: Teijin LimitedInventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
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Publication number: 20240291103Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and an inorganic filler, in which an average primary particle size of all of the inorganic filler contained in the adhesive porous layer is from 0.01 ?m to less than 0.50 ?m, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.Type: ApplicationFiled: July 15, 2022Publication date: August 29, 2024Applicant: TEIJIN LIMITEDInventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
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Publication number: 20230216143Abstract: A separator for a non-aqueous secondary battery contains: a porous substrate and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a resin and inorganic particles, in which (A) the resin contains a copolymer having a vinylidene fluoride unit and a hexafluoropropylene unit satisfying particular requirements, a content of the inorganic particles in the heat-resistant porous layer is from 50% by mass to 90% by mass, and the inorganic particles contain first inorganic particles and second inorganic particles satisfying particular size requirements, or (B) a content of the inorganic particles in the heat-resistant porous layer is from 50% by mass to 90% by mass, and the inorganic particles contain first inorganic particles that are metal sulfate (or metal hydroxide) particles and second inorganic particles that are inorganic particles other than metal sulfate (or metal hydroxide) particles.Type: ApplicationFiled: May 27, 2021Publication date: July 6, 2023Applicant: Teijin LimitedInventors: Rika KURATANI, Satoshi NISHIKAWA
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Publication number: 20220190441Abstract: Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin, an acrylic type resin and metal sulfate particles, in which an average primary particle diameter of the metal sulfate particles contained in the adhesive porous layer is from 0.01 ?m to less than 0.30 ?m.Type: ApplicationFiled: February 14, 2020Publication date: June 16, 2022Applicant: TEIJIN LIMITEDInventors: Hiroshi SAKURAI, Rika KURATANI, Satoshi NISHIKAWA
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Publication number: 20220149483Abstract: An embodiment of the invention provide a separator for a non-aqueous secondary battery, including a porous substrate; and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and barium sulfate particles, in which an average primary particle diameter of the barium sulfate particles contained in the heat-resistant porous layer is from 0.01 ?m to less than 0.30 ?m, and in which a volume ratio of the barium sulfate particles in the heat-resistant porous layer is from 30% by volume to less than 50% by volume.Type: ApplicationFiled: March 23, 2020Publication date: May 12, 2022Applicant: TEIJIN LIMITEDInventors: Megumi SATO, Rika KURATANI, Yu NAGAO, Masato OKAZAKI, Satoshi NISHIKAWA
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Publication number: 20200411827Abstract: An embodiment according to the invention provides a separator for a non-aqueous secondary battery, containing a porous substrate and an adhesive porous layer that contains resin A and resin B1; (1) resin A: a copolymer containing vinylidene fluoride (VDF) and hexafluoropropylene (HFP), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit and HFP monomer unit is from more than 1.5 mol % to 3.5 mol %, and (2) resin B1: a copolymer containing VDF, HFP, and a monomer of formula (1), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit, HFP monomer unit, and a monomer unit of formula (1) is from more than 3.5 mol % to 15 mol % (R1 to R3: H, a halogen atom, a carboxyl group, etc., or a C1-5 alkyl group; X: a single bond, a C1-5 alkylene group, etc., Y: H, a C1-5 alkyl group, etc.Type: ApplicationFiled: November 29, 2018Publication date: December 31, 2020Applicant: Teijin LimitedInventors: Rika KURATANI, Megumi SATO, Satoshi NISHIKAWA
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Publication number: 20200343511Abstract: Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and barium sulfate particles, in which an average primary particle size of the barium sulfate particles contained in the heat resistant porous layer is from 0.01 ?m to less than 0.30 ?m.Type: ApplicationFiled: September 18, 2018Publication date: October 29, 2020Applicant: TEIJIN LIMITEDInventors: Yu NAGAO, Megumi SATO, Rika KURATANI, Masato OKAZAKI, Satoshi NISHIKAWA
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Patent number: 10811654Abstract: A separator for a non-aqueous secondary battery, containing a porous substrate, and an adhesive porous layer that is provided on one side or both sides of the porous substrate, in which the adhesive porous layer contains a polyvinylidene fluoride type resin including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and the polyvinylidene fluoride type resin has an acid value of from 3.0 mgKOH/g to 20 mgKOH/g.Type: GrantFiled: November 8, 2016Date of Patent: October 20, 2020Assignee: TEIJIN LIMITEDInventors: Susumu Honda, Satoshi Nishikawa, Takashi Yoshitomi, Rika Kuratani
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Patent number: 10714723Abstract: Provided is a separator for a non-aqueous secondary battery, including: a porous substrate having an average pore diameter of from 20 nm to 100 nm; and a porous layer provided on one or both sides of the porous substrate and including a polyvinylidene fluoride resin and a filler, the porous layer including a filler in an amount of from 45% by volume to 75% by volume with respect to a total solid content of the porous layer, a weight average molecular weight of the polyvinylidene fluoride resin being 1,000,000 or more, and a peel strength between the porous substrate and the porous layer being 0.20 N/12 mm or more.Type: GrantFiled: June 22, 2015Date of Patent: July 14, 2020Assignee: TEIJIN LIMITEDInventors: Rika Kuratani, Satoshi Nishikawa
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Patent number: 10199623Abstract: A separator for a nonaqueous secondary battery, including a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a carbon material and a polyvinylidene fluoride resin. The separator has an initial static voltage of 0 V as measured in accordance with JIS L1094.Type: GrantFiled: January 29, 2015Date of Patent: February 5, 2019Assignee: TEIJIN LIMITEDInventors: Rika Kuratani, Satoshi Nishikawa
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Publication number: 20180331342Abstract: A separator for a non-aqueous secondary battery, containing a porous substrate, and an adhesive porous layer that is provided on one side or both sides of the porous substrate, in which the adhesive porous layer contains a polyvinylidene fluoride type resin including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and the polyvinylidene fluoride type resin has an acid value of from 3.0 mgKOH/g to 20 mgKOH/g.Type: ApplicationFiled: November 8, 2016Publication date: November 15, 2018Applicant: TEIJIN LIMITEDInventors: Susumu HONDA, Satoshi NISHIKAWA, Takashi YOSHITOMI, Rika KURATANI
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Publication number: 20180212220Abstract: Provided is a separator for a non-aqueous secondary battery, including: a porous substrate having an average pore diameter of from 20 nm to 100 nm; and a porous layer provided on one or both sides of the porous substrate and including a polyvinylidene fluoride resin and a filler, the porous layer including a filler in an amount of from 45% by volume to 75% by volume with respect to a total solid content of the porous layer, a weight average molecular weight of the polyvinylidene fluoride resin being 1,000,000 or more, and a peel strength between the porous substrate and the porous layer being 0.20 N/12 mm or more.Type: ApplicationFiled: June 22, 2015Publication date: July 26, 2018Applicant: Teijin LimitedInventors: Rika KURATANI, Satoshi NISHIKAWA
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Publication number: 20170005307Abstract: A separator for a nonaqueous secondary battery, including a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a carbon material and a polyvinylidene fluoride resin. The separator has an initial static voltage of 0 V as measured in accordance with JIS L1094.Type: ApplicationFiled: January 29, 2015Publication date: January 5, 2017Applicant: TEIJIN LIMITEDInventors: Rika KURATANI, Satoshi NISHIKAWA