Patents by Inventor Takahiro OKUGAWA
Takahiro OKUGAWA 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: 20230146715Abstract: A cold protection material includes an outer fabric, an inner fabric, two connecting members bonded to the outer fabric and the inner fabric to form a space between the outer fabric and the inner fabric, and a filler stored in the space. Each of the two connecting members has an outer surface bonded to the outer fabric and an inner surface bonded to the inner fabric, and has air permeability, and each of the two connecting members is formed of a flexible material, and is soft enough not to be deformed to reduce a distance between the outer surface and the inner surface by a weight of the outer fabric or the inner fabric.Type: ApplicationFiled: September 28, 2020Publication date: May 11, 2023Inventors: Takahiro OKUGAWA, Naoki HONDA
-
Publication number: 20230024924Abstract: A cold protection material includes: a front side fabric constituting a front fabric of the cold proof garment or constituting a fabric disposed inside the front fabric; a back side fabric disposed on a back side of the front side fabric; two partition members forming a space between the front side fabric and the back side fabric; a filler made of down or feathers stored in the space; an air permeable member disposed to cover a vent hole provided in the front side fabric or the back side fabric; and a sealing member fixed to the air permeable member so as to prevent ventilation at least at a portion facing the vent hole in the air permeable member. The air permeable member allows ventilation at a portion other than a portion to which the sealing member is fixed.Type: ApplicationFiled: December 24, 2020Publication date: January 26, 2023Inventors: Takahiro OKUGAWA, Naoki HONDA
-
Publication number: 20220173392Abstract: A lithium metal composite oxide powder having a layered structure, containing at least Li, Ni, an element X, and an element M, in which the element X is one or more elements selected from the group consisting of Co, Mn, Fe, Cu, Ti, Mg, Al, W, Mo, Nb, Zn, Sn, Zr, Ga, and V, the element M is one or more elements selected from the group consisting of B, Si, S, and P, M/(Ni+X) that is a content ratio of the element M to a total amount of Ni and the element X that are contained in the lithium metal composite oxide powder is 0.01 mol % or more and 5 mol % or less, Ni/(Ni+X) that is a content ratio of Ni to the total amount of Ni and the element X that are contained in the lithium metal composite oxide powder satisfies 0.40 or more in terms of a mole ratio, and a ratio of the element M eluted into N-methyl-2-pyrrolidone measured under specific measurement conditions is 0.09 or less.Type: ApplicationFiled: February 26, 2020Publication date: June 2, 2022Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takahiro OKUGAWA, Keita MURAKAMI, Marie TAKEMOTO
-
Patent number: 10677587Abstract: In regard to at least one of long separator sheets (12a, 12b), measurement is carried out to measure the amount of curl at an edge of the at least one of the long separator sheets (12a, 12b) while applying tension to the at least one of the long separator sheets (12a, 12b) in the lengthwise direction (MD) of the at least one of the long separator sheets (12a, 12b), the edge being parallel to the lengthwise direction (MD) of the at least one of the long separator sheets (12a, 12b). This makes it possible to provide a method of measuring the amount of curl in a separator, a slitting apparatus, and a curl amount measuring apparatus, each of which is capable of carrying out a highly accurate nondestructive measurement of the amount of curl without having to cut a sample from a long separator sheet.Type: GrantFiled: January 27, 2017Date of Patent: June 9, 2020Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Daijiro Hoshida, Hiroko Nakashima, Takahiro Okugawa
-
Patent number: 10661528Abstract: Provided is a separator including a first later consisting of a porous polyolefin and a secondary battery utilizing the separator. The first layer exhibits a temperature-increase convergence time equal to or longer than 2.9 s·m2/g and equal to or shorter than 5.7 s·m2/g when the first layer is irradiated with a microwave having a frequency of 2455 MHz and an output power of 1800 W after being dipped in N-methylpyrrolidone containing 3 wt % of water. A minimum height of a ball placed over the first layer and having a diameter of 14.3 mm and a weight of 11.9 g is equal to or more than 50 cm and equal to or less than 150 cm, the minimum height causing a split in the first layer when the ball freely falls on the first layer.Type: GrantFiled: October 24, 2016Date of Patent: May 26, 2020Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Chikae Yoshimaru, Chikara Murakami, Takahiro Okugawa
-
Patent number: 10591347Abstract: To measure the mass per unit area of an applied layer in a layered film while preventing a measurement error from being caused by thickness unevenness, a per-unit-area-mass measuring device (30) includes a light projector (31a) configured to project light having a center wavelength of 405 nm, a light projector (31b) configured to project light having a center wavelength of 850 nm, light receivers (32a, 32b) configured to receive light having been transmitted through a separator (12), and a control section (33) configured to calculate the mass per unit area of a heat-resistant layer (4) on the basis of the respective transmitted-light intensities of the light having a center wavelength of 405 nm and the light having a center wavelength of 850 nm.Type: GrantFiled: June 2, 2016Date of Patent: March 17, 2020Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takayuki Yamano, Takahiro Okugawa
-
Publication number: 20200070470Abstract: Provided is a separator including a first later consisting of a porous polyolefin and a secondary battery utilizing the separator. The first layer exhibits a temperature-increase convergence time equal to or longer than 2.9 s·m2/g and equal to or shorter than 5.7 s·m2/g when the first layer is irradiated with a microwave having a frequency of 2455 MHz and an output power of 1800 W after being dipped in N-methylpyrrolidone containing 3 wt % of water. A minimum height of a ball placed over the first layer and having a diameter of 14.3 mm and a weight of 11.9 g is equal to or more than 50 cm and equal to or less than 150 cm, the minimum height causing a split in the first layer when the ball freely falls on the first layer.Type: ApplicationFiled: October 24, 2016Publication date: March 5, 2020Inventors: Chikae YOSHIMARU, Chikara MURAKAMI, Takahiro OKUGAWA
-
Publication number: 20200067139Abstract: A separator including a first layer consisting of a porous polyolefin and a secondary battery including the separator are provided. The first layer has a parameter X, defined by the following equation, equal to or more than 0 and equal to or less than 20 and a minimum height of a ball in a falling-ball test of the first layer equal to or more than 50 cm and equal to or less than 150 cm. Here, MD tan ? and TD tan ? are respectively loss tangents in flow and width directions obtained by a viscoelasticity measurement of the first layer at a temperature of 90° C.Type: ApplicationFiled: October 24, 2016Publication date: February 27, 2020Inventors: Hiroki HASHIWAKI, Chikara MURAKAMI, Takahiro OKUGAWA
-
Publication number: 20190245180Abstract: Provided is a separator including a first layer which consists of a porous polyolefin and a secondary battery utilizing the separator. A first layer exhibits a minimum height equal to or more than 50 cm and equal to or less than 150 cm when a ball having a diameter of 14.3 mm and a weight of 11.9 g located over the first layer is allowed to free fall causing a split in the first layer. A tearing strength of the first layer in a width direction, measured with an Elmendorf tearing method, is equal to or more than 1.5 mN/?m. A tensile elongation of the first layer is equal to or longer than 0.5 mm until a load decreases to 25% of a maximum load in a load-elongation curve in machine direction measured by a rectangular tearing method.Type: ApplicationFiled: October 24, 2016Publication date: August 8, 2019Inventors: Takahiro OKUGAWA, Tomoaki OZEKI
-
Patent number: 10347891Abstract: In the present invention, in laminated separator rolls 12U and 12L, laminated long separator sheets 12a and 12b are wound such that a surface B (which is of an aramid layer (heat-resistant layer) and is opposite to a surface contacting with the porous film) faces an inner side (core u, l side). From this, it is possible to provide the laminated separator roll which can inhibit change in color of the porous layer included in the porous long separator sheet.Type: GrantFiled: May 23, 2017Date of Patent: July 9, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Daizaburo Yashiki, Takahiro Okugawa
-
Patent number: 10290849Abstract: A laminated porous film, including: a porous layer containing a polyolefin; and a porous layer containing a heat-resistant material and provided on at least one surface of the porous layer containing the polyolefin, the laminated porous film satisfying Formula (I) below, 0.1136×?+0.0819×?+3.8034?4.40??(I), where ? is a value of a film resistance (?·cm2) of the laminated porous film, and ? is a value of a volume (cc/m2) of the heat-resistant material contained per 1 m2 of the porous layer containing the heat-resistant material.Type: GrantFiled: February 6, 2015Date of Patent: May 14, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kosuke Kurakane, Chikara Murakami, Takahiro Okugawa, Yutaka Suzuki, Tomoaki Ozeki
-
Publication number: 20190033066Abstract: In regard to at least one of long separator sheets (12a, 12b), measurement is carried out to measure the amount of curl at an edge of the at least one of the long separator sheets (12a, 12b) while applying tension to the at least one of the long separator sheets (12a, 12b) in the lengthwise direction (MD) of the at least one of the long separator sheets (12a, 12b), the edge being parallel to the lengthwise direction (MD) of the at least one of the long separator sheets (12a, 12b). This makes it possible to provide a method of measuring the amount of curl in a separator, a slitting apparatus, and a curl amount measuring apparatus, each of which is capable of carrying out a highly accurate nondestructive measurement of the amount of curl without having to cut a sample from a long separator sheet.Type: ApplicationFiled: January 27, 2017Publication date: January 31, 2019Inventors: Daijiro HOSHIDA, Hiroko NAKASHIMA, Takahiro OKUGAWA
-
Patent number: 10059085Abstract: A roll is made of a porous film in a belt-like shape, the porous film having a width of not smaller than 20 mm. In a case where a roughness along a width direction of an outermost surface of the roll is measured at 1 mm intervals across an entire width of the outermost surface, a difference between a maximum roughness value and a minimum roughness value in a distance of 20 mm in the width direction of the outermost surface is less than 25 ?m.Type: GrantFiled: August 28, 2015Date of Patent: August 28, 2018Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takahiro Okugawa, Yutaka Suzuki, Tomoaki Ozeki, Chikara Murakami
-
Publication number: 20180172499Abstract: To measure the mass per unit area of an applied layer in a layered film while preventing a measurement error from being caused by thickness unevenness, a per-unit-area-mass measuring device (30) includes a light projector (31a) configured to project light having a center wavelength of 405 nm, a light projector (31b) configured to project light having a center wavelength of 850 nm, light receivers (32a, 32b) configured to receive light having been transmitted through a separator (12), and a control section (33) configured to calculate the mass per unit area of a heat-resistant layer (4) on the basis of the respective transmitted-light intensities of the light having a center wavelength of 405 nm and the light having a center wavelength of 850 nm.Type: ApplicationFiled: June 2, 2016Publication date: June 21, 2018Inventors: Takayuki YAMANO, Takahiro OKUGAWA
-
Publication number: 20170341854Abstract: In the present invention, a porous separator roll (12U, 12L) is wrapped with a wrapping material (21) whose average transmittance with respect to light having a wavelength of 360 nm to 390 nm is 25% or lower. From this, it is possible to provide a package of a porous separator roll which package can inhibit change in color of a separator, and can thus provide a high-quality separator with good appearance.Type: ApplicationFiled: May 24, 2017Publication date: November 30, 2017Inventors: Daizaburo YASHIKI, Takahiro OKUGAWA
-
Publication number: 20170346061Abstract: In the present invention, in laminated separator rolls 12U and 12L, laminated long separator sheets 12a and 12b are wound such that a surface B (which is of an aramid layer (heat-resistant layer) and is opposite to a surface contacting with the porous film) faces an inner side (core u, l side). From this, it is possible to provide the laminated separator roll which can inhibit change in color of the porous layer included in the porous long separator sheet.Type: ApplicationFiled: May 23, 2017Publication date: November 30, 2017Inventors: Daizaburo YASHIKI, Takahiro OKUGAWA
-
Publication number: 20170173927Abstract: A roll of an embodiment of the present invention is a roll that is made of a porous film in a belt-like shape, the porous film having a width of not smaller than 20 mm. In a case where a roughness along a width direction of an outermost surface of the roll is measured at 1 mm intervals across an entire width of the outermost surface, a difference between a maximum roughness value and a minimum roughness value in a distance of 20 mm in the width direction of the outermost surface is less than 25 ?m.Type: ApplicationFiled: August 28, 2015Publication date: June 22, 2017Inventors: Takahiro OKUGAWA, Yutaka SUZUKI, Tomoaki OZEKI, Chikara MURAKAMI
-
Publication number: 20170155124Abstract: Provided is a nonaqueous electrolyte secondary battery separator excellent in slip characteristics with respect to pins and in cutting processibility. The nonaqueous electrolyte secondary battery separator is a porous film containing polyolefin as a major component, and has a thickness of 20 ?m or less and a porosity of 20% to 55%. A minimum height from which a ball, with a diameter of 14.3 mm and a weight of 11.9 g, is made to free-fall on the porous film, so that the porous film is caused to be torn, is not less than 50 cm.Type: ApplicationFiled: October 19, 2016Publication date: June 1, 2017Inventor: Takahiro OKUGAWA
-
Publication number: 20170040584Abstract: A laminated porous film, including: a porous layer containing a polyolefin; and a porous layer containing a heat-resistant material and provided on at least one surface of the porous layer containing the polyolefin, the laminated porous film satisfying Formula (I) below, 0.1136×?+0.0819×?+3.8034?4.40 ??(I), where ? is a value of a film resistance (?·cm2) of the laminated porous film, and ? is a value of a volume (cc/m2) of the heat-resistant material contained per 1 m2 of the porous layer containing the heat-resistant material.Type: ApplicationFiled: February 6, 2015Publication date: February 9, 2017Inventors: Kosuke KURAKANE, Chikara MURAKAMI, Takahiro OKUGAWA, Yutaka SUZUKI, Tomoaki OZEKI