Patents by Inventor Takashi Yoshitomi

Takashi Yoshitomi 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).

  • Patent number: 10811657
    Abstract: There is provided 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 A including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and a polyvinylidene fluoride type resin B including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, a proportion of the hexafluoropropylene monomer unit in the polyvinylidene fluoride type resin A is more than 1.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: October 20, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Susumu Honda, Satoshi Nishikawa, Takashi Yoshitomi
  • Patent number: 10811654
    Abstract: 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: Grant
    Filed: November 8, 2016
    Date of Patent: October 20, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Susumu Honda, Satoshi Nishikawa, Takashi Yoshitomi, Rika Kuratani
  • Publication number: 20200266407
    Abstract: There is provided 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 A including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and a polyvinylidene fluoride type resin B including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, a proportion of the hexafluoropropylene monomer unit in the polyvinylidene fluoride type resin A is more than 1.
    Type: Application
    Filed: November 8, 2016
    Publication date: August 20, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Susumu HONDA, Satoshi NISHIKAWA, Takashi YOSHITOMI
  • Patent number: 10622611
    Abstract: Provided is a separator for a nonaqueous electrolyte battery, including a porous substrate and an adhesive porous layer that is provided on one side or both sides of the porous substrate and contains an adhesive resin. The ratio of the standard deviation of the areal weight of the adhesive porous layer to the mean of the areal weight of the adhesive porous layer (g/m2) (standard deviation/mean) is 0.3 or less.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 14, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Satoshi Nishikawa, Takashi Yoshitomi
  • Patent number: 10347892
    Abstract: Provided is 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 both sides of the porous substrate, that is an aggregate of resin particles and an inorganic filler, and that satisfies the following expression (1). In expression (1), Vf is a volume proportion (% by volume) of the inorganic filler in the heat resistant porous layer, and CPVC is a critical pigment volume concentration (% by volume) of the inorganic filler. Also provided is a separator for a non-aqueous secondary battery, including: a porous substrate, a heat resistant porous layer that is provided on one side or both sides of the porous substrate, that includes a resin and an filler, and that satisfies the following expression (2), and an adhesive porous layer that is provided on both sides of a stacked body of the porous substrate and the heat resistant porous layer, and that includes an adhesive resin.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: July 9, 2019
    Assignee: TEIJIN LIMITED
    Inventors: Susumu Honda, Takashi Yoshitomi, Satoshi Nishikawa
  • Patent number: 10326120
    Abstract: Provided is a separator for a nonaqueous electrolyte battery, including a porous substrate and an adhesive porous layer that is provided on one side or both sides of the porous substrate and contains an adhesive resin. The separator has a thermal expansion coefficient of more than 0% and 10% or less in the width direction when heat-treated at 105° C. for 30 minutes.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: June 18, 2019
    Assignee: TEIJIN LIMITED
    Inventors: Satoshi Nishikawa, Takashi Yoshitomi
  • Publication number: 20180331342
    Abstract: 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: Application
    Filed: November 8, 2016
    Publication date: November 15, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Susumu HONDA, Satoshi NISHIKAWA, Takashi YOSHITOMI, Rika KURATANI
  • Patent number: 10115948
    Abstract: The present invention provides a separator for a non-aqueous secondary battery including a porous substrate, and an adhesive porous layer that is formed at one or both sides of the porous substrate, that contains polyvinylidene fluoride resin A and polyvinylidene fluoride resin B, and that has a porosity of from 30% to 60% and an average pore size of from 20 nm to 100 nm.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 30, 2018
    Assignee: TEIJIN LIMITED
    Inventors: Satoshi Nishikawa, Takashi Yoshitomi, Atsuhiro Otsuka, Ayumi Iwai
  • Patent number: 10096811
    Abstract: A separator for a non-aqueous secondary battery including a porous substrate, and an adhesive porous layer that is formed on one side or both sides of the porous substrate and contains the following resin A and the following resin B. Resin A: a polyvinylidene fluoride resin containing structural units derived from vinylidene fluoride (VDF) and structural units derived from hexafluoropropylene (HFP), a total content ratio of structural units derived from HFP in each of the VDF copolymers being from 0.5 mol % to 1.5 mol % of a total content of structural units in each of the VDF copolymers; and Resin B: a polyvinylidene fluoride resin containing structural units derived from VDF and structural units derived from HFP, a total content ratio of structural units derived from HFP in each of the VDF copolymers being greater than 1.5 mol % of a total content of structural units in each of the VDF copolymers.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 9, 2018
    Assignee: TEIJIN LIMITED
    Inventors: Satoshi Nishikawa, Takashi Yoshitomi, Atsuhiro Otsuka, Ayumi Iwai
  • Patent number: 10074840
    Abstract: Provided is 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 both sides of the porous substrate, that is an aggregate of resin particles and an inorganic filler, and that satisfies the following expression (1). In expression (1), Vf is a volume proportion (% by volume) of the inorganic filler in the heat resistant porous layer, and CPVC is a critical pigment volume concentration (% by volume) of the inorganic filler. Also provided is a separator for a non-aqueous secondary battery, including: a porous substrate, a heat resistant porous layer that is provided on one side or both sides of the porous substrate, that includes a resin and an filler, and that satisfies the following expression (2), and an adhesive porous layer that is provided on both sides of a stacked body of the porous substrate and the heat resistant porous layer, and that includes an adhesive resin.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: September 11, 2018
    Assignee: TEIJIN LIMITED
    Inventors: Susumu Honda, Takashi Yoshitomi, Satoshi Nishikawa
  • Publication number: 20180190957
    Abstract: A separator includes a porous substrate, and a porous layer formed on one or both surfaces of the substrate and containing a polyvinylidene fluoride type resin and a filler, in which the filler content in the porous layer is from 30 to 80% by mass with respect to the total mass of the polyvinylidene fluoride type resin and the filler, and the polyvinylidene fluoride type resin is at least one resin selected from the following resin A and B: resin A: a copolymer having a weight average molecular weight of from 100,000 to 350,000, and a content of HFP is more than 5% by mass but not more than 11% by mass; and resin B: a copolymer having a weight average molecular weight of from 100,000 to 1,000,000, in which a content of HFP is more than 11% by mass but not more than 15% by mass.
    Type: Application
    Filed: June 30, 2016
    Publication date: July 5, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Susumu HONDA, Satoshi NISHIKAWA, Takashi YOSHITOMI, Tomoya HAMADA, Yoshimitsu TAKANO
  • Publication number: 20180166672
    Abstract: Provided is 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 both sides of the porous substrate, that is an aggregate of resin particles and an inorganic filler, and that satisfies the following expression (1). In expression (1), Vf is a volume proportion (% by volume) of the inorganic filler in the heat resistant porous layer, and CPVC is a critical pigment volume concentration (% by volume) of the inorganic filler. Also provided is a separator for a non-aqueous secondary battery, including: a porous substrate, a heat resistant porous layer that is provided on one side or both sides of the porous substrate, that includes a resin and an filler, and that satisfies the following expression (2), and an adhesive porous layer that is provided on both sides of a stacked body of the porous substrate and the heat resistant porous layer, and that includes an adhesive resin.
    Type: Application
    Filed: February 12, 2018
    Publication date: June 14, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Susumu HONDA, Takashi YOSHITOMI, Satoshi NISHIKAWA
  • Publication number: 20180130988
    Abstract: Provided is a separator for a nonaqueous electrolyte battery, including a porous substrate and an adhesive porous layer that is provided on one side or both sides of the porous substrate and contains an adhesive resin. The ratio of the standard deviation of the areal weight of the adhesive porous layer to the mean of the areal weight of the adhesive porous layer (g/m2) (standard deviation/mean) is 0.3 or less.
    Type: Application
    Filed: January 10, 2018
    Publication date: May 10, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Satoshi NISHIKAWA, Takashi YOSHITOMI
  • Patent number: 9905825
    Abstract: Provided is a separator for a nonaqueous electrolyte battery, including a porous substrate and an adhesive porous layer that is provided on one side or both sides of the porous substrate and contains an adhesive resin. The ratio of the standard deviation of the areal weight of the adhesive porous layer to the mean of the areal weight of the adhesive porous layer (g/m2) (standard deviation/mean) is 0.3 or less.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: February 27, 2018
    Assignee: TEIJIN LIMITED
    Inventors: Satoshi Nishikawa, Takashi Yoshitomi
  • Patent number: 9882189
    Abstract: Provided is a separator for a nonaqueous electrolyte battery, which includes a porous substrate and an adhesive porous layer that is provided on at least one side of the porous substrate and contains an adhesive resin. The separator has a pore size distribution such that, as measured by a pore size distribution measurement test, the pore size at the maximum value of the maximum peak is within a range of 0.02 ?m to 0.1 ?m, and the pore size distribution range value ? defined as follows is 0.4 or less. The pore size distribution range value ? herein is a value calculated by the following equation from pore sizes D90, D10, and D50 corresponding to cumulative pore size distributions of 90%, 10%, and 50%, respectively: pore size distribution range value ?=(D90?D10 )/D50.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 30, 2018
    Assignee: TEIJIN LIMITED
    Inventors: Ayumi Iwai, Satoshi Nishikawa, Takashi Yoshitomi
  • Patent number: 9799868
    Abstract: A separator for a non-aqueous secondary battery includes a porous substrate and an adhesive porous layer provided on one or both sides of the porous substrate, the adhesive porous layer including a polyvinylidene-fluoride resin and a filler whose difference between a particle diameter at 90% cumulative volume and a particle diameter at 10% cumulative volume is 2 ?m or less, and the adhesive porous layer satisfying Inequality (1): 0.5?a/r?3.0, wherein, in Inequality (1), “a” represents an average thickness (?m) of the adhesive porous layer on one of the sides of the porous substrate; and “r” represents a volume average particle diameter (?m) of the filler contained in the adhesive porous layer.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: October 24, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Ayumi Iwai, Takashi Yoshitomi, Satoshi Nishikawa
  • Patent number: 9755208
    Abstract: Provided is a non-aqueous-secondary-battery separator including: a microporous membrane; and an adhesive porous layer which is provided on one or both surfaces of the microporous membrane and includes a fibrillar polyvinylidene fluoride resin, in which an average hole diameter acquired from the specific surface area of the microporous membrane is greater than 90 nm and equal to or smaller than 250 nm, peeling strength between the microporous membrane and the adhesive porous layer is equal to or greater than 0.10 N/cm, and a fibrillar diameter acquired from the specific surface area of the adhesive porous layer is from 50 nm to 70 nm.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: September 5, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Ayumi Iwai, Takashi Yoshitomi, Satoshi Nishikawa
  • Patent number: 9692028
    Abstract: Provided is a separator for a nonaqueous electrolyte battery including a composite membrane. The composite membrane includes a porous substrate that contains a thermoplastic resin and an adhesive porous layer that is provided on at least one side of the porous substrate and contains an adhesive resin. The difference between the Gurley number of the porous substrate and the Gurley number of the composite membrane is 75 sec/100 cc or less. The difference between the tortuosity of the porous substrate and the tortuosity of the composite membrane is 0.30 or less.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: June 27, 2017
    Assignee: TEIJIN LIMITED
    Inventor: Takashi Yoshitomi
  • Patent number: 9680142
    Abstract: A polyolefin microporous membrane, the membrane having, when measured by DSC, a degree of crystallinity of from 65 to 85%, a lamellar crystal/crystal ratio of from 30 to 85%, a crystal length of from 5 nm to 50 nm and an amorphous length of from 3 nm to 30 nm, and a polyolefin microporous membrane, the membrane having, when measured by X-ray diffractometry, crystal size of from 12.5 nm to 13.5 nm and a degree of crystallinity of from 64 to 68%.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: June 13, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Hiroki Sano, Satoshi Nishikawa, Takashi Yoshitomi
  • Patent number: 9570725
    Abstract: Disclosed is a separator for a non-aqueous electrolyte battery, the separator including a polyolefin microporous substrate in which a content of polyolefin having a molecular weight of 100,000 or less is from 10% by mass to 25% by mass relative to a total amount of polyolefin, and a heat resistant porous layer that is formed on one or both sides of the polyolefin microporous substrate and that includes a heat resistant polymer, wherein a maximum value of S, which is represented by the following formula (1), is 0.8 or more, and a temperature exhibiting the maximum value of S is from 130° C. to 155° C.: S=d(log R)/dT??Formula (1): wherein R represents a resistance (ohm·cm2) of a cell, and T represents a temperature (° C.), in a measurement using a battery that includes the cell that is provided with a separator for a non-aqueous electrolyte battery, at a temperature rising rate of 1.6° C./min.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 14, 2017
    Assignee: TEIJIN LIMITED
    Inventor: Takashi Yoshitomi