Patents by Inventor Yasuhiro Shirotani
Yasuhiro Shirotani 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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Patent number: 11864314Abstract: The present invention relates to a patterned fiber substrate comprising: a fiber substrate; and a pattern consisting of a functional material and formed on the fiber substrate, wherein at least a part of the functional material that constitutes the pattern is present in inside of the fiber substrate, the fiber substrate has a contact angle of 100 to 170° with pure water on its surface, and the pattern has a narrowest line width of 1 to 3000 ?m.Type: GrantFiled: December 18, 2019Date of Patent: January 2, 2024Assignees: KURARAY CO., LTD., OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Kohei Hayashi, Soichi Obata, Yasuhiro Shirotani, Masashi Nitani, Mayumi Uno, Kazuki Maeda
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Publication number: 20230327134Abstract: A current collector, an electrode, and a non-aqueous electrolyte battery are provided. The current collector includes a conductive body having a three-dimensional porous structure. The current collector has an air permeability of 0.1 to 600 cc/cm2/sec and a thickness of less than 100 ?m. Also, the electrode includes the current collector and an electrode material layer disposed on at least one surface of the current collector. The non-aqueous electrolyte battery includes the electrode.Type: ApplicationFiled: May 31, 2023Publication date: October 12, 2023Applicant: KURARAY KURAFLEX CO., LTD.Inventors: Yasuhiro SHIROTANI, Soichi OBATA, Tetsuya OKAMOTO, Hideharu IWASAKI
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Patent number: 11642247Abstract: A pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer is provided. The pressure-sensitive adhesive layer includes crater portions, each crater portion being concavely formed on an adhesive surface of the pressure-sensitive adhesive layer. A surface of the crater portion has a plurality of through holes.Type: GrantFiled: November 1, 2017Date of Patent: May 9, 2023Assignee: KURARAY CO., LTD.Inventors: Yasuhiro Shirotani, Yohei Shimizu, Yasutomi Matsushima, Junichi Taniguchi
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Patent number: 11440289Abstract: Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.Type: GrantFiled: February 7, 2020Date of Patent: September 13, 2022Assignee: KURARAY CO., LTD.Inventors: Tetsuya Okamoto, Yasuhiro Shirotani
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Publication number: 20220117083Abstract: The present invention relates to a patterned fiber substrate comprising: a fiber substrate; and a pattern consisting of a functional material and formed on the fiber substrate, wherein at least a part of the functional material that constitutes the pattern is present in inside of the fiber substrate, the fiber substrate has a contact angle of 100 to 170° with pure water on its surface, and the pattern has a narrowest line width of 1 to 3000 ?m.Type: ApplicationFiled: December 18, 2019Publication date: April 14, 2022Applicants: KURARAY CO., LTD., OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Kohei HAYASHI, Soichi OBATA, Yasuhiro SHIROTANI, Masashi NITANI, Mayumi UNO, Kazuki MAEDA
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Publication number: 20210381145Abstract: Provided are a continuous-fiber nonwoven fabric having excellent denseness, a composite material including the nonwoven fabric and having good appearance, and a method for producing the composite material. The continuous-fiber nonwoven fabric includes fibers containing an amorphous thermoplastic phenoxy resin as a main component, wherein the thermoplastic phenoxy resin has a weight-average molecular weight in a range of from 10,000 to 100,000 and a glass transition temperature equal to or lower than 100° C. For example, the continuous-fiber nonwoven fabric may be a melt-blown nonwoven fabric or a spunbonded nonwoven fabric.Type: ApplicationFiled: August 23, 2021Publication date: December 9, 2021Applicant: KURARAY CO., LTD.Inventors: Tetsuya OKAMOTO, Yasuhiro SHIROTANI, Soichi OBATA
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Patent number: 10829879Abstract: Provided is a conductive nonwoven fabric, including a meltblown nonwoven fabric made from a melt liquid-crystal-forming wholly aromatic polyester having a melt viscosity at 310° C. of less than or equal to 20 Pa·s and satisfying (A) an average fiber diameter from 0.1 ?m to 5 ?m, (B) two or less film-like objects existing per 1 mm2 of the nonwoven fabric, (C) a breaking length in a warp direction of greater than or equal to 10 km and a breaking length in a weft direction of greater than or equal to 6 km, (D) a basis weight from 1.0 g/m2 to 15 g/m2, (E) a thickness from 5 ?m to 50 ?m, and (F) an air permeability of less than or equal to 300 cc/cm2/second, and a metal coating film formed on the meltblown nonwoven fabric.Type: GrantFiled: August 22, 2014Date of Patent: November 10, 2020Assignee: KURARAY CO., LTD.Inventors: Yasuhiro Shirotani, Kimihiko Houhashi, Kazuo Ohira
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Publication number: 20200171789Abstract: Provided are a melt blown (MB) nonwoven fabric, a laminate using the same, a method of producing a melt blown nonwoven fabric as well as a melt blowing apparatus. A melt blowing apparatus 100 includes a die 10 configured to discharge a resin melt 42 with an accompanying jet to give fiber materials, a hollow cover 20, and a collector 60. The fiber materials 50 from the die 10 are heated to a temperature equal to or higher than a crystallization temperature of crystalline thermoplastic resin inside the hollow cover 20 and collected on a collecting surface 62 of the collector 60. The hollow cover 20 and the collector 60 are separated by a distance of 5 cm or longer between a lower edge 28 of the hollow cover 20 and the collecting surface 62 in a line extending downwardly from the nozzle holes 12 in a vertical direction.Type: ApplicationFiled: February 7, 2020Publication date: June 4, 2020Applicant: KURARAY CO., LTD.Inventors: Tetsuya OKAMOTO, Yasuhiro SHIROTANI
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Patent number: 10526736Abstract: Provided are a nonwoven fabric mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. of 100 to 3000 Pa·s, and satisfying conditions of: 1) an average fiber diameter of 0.5 to 5 ?m; 2) an air permeability of more than or equal to 20 seconds/100 mL; and 3) a withstand voltage of more than or equal to 15 kV/mm, an insulating material using the nonwoven fabric, and a method for manufacturing the nonwoven fabric including continuously treating fibers between a pair of rolls at a temperature of 150 to 300° C. and a linear pressure of 100 to 500 kg/cm.Type: GrantFiled: March 24, 2015Date of Patent: January 7, 2020Assignee: KURARAY CO., LTD.Inventor: Yasuhiro Shirotani
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Publication number: 20190321235Abstract: A pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer is provided. The pressure-sensitive adhesive layer includes crater portions, each crater portion being concavely formed on an adhesive surface of the pressure-sensitive adhesive layer. A surface of the crater portion has a plurality of through holes.Type: ApplicationFiled: November 1, 2017Publication date: October 24, 2019Applicant: KURARAY CO., LTD.Inventors: Yasuhiro SHIROTANI, Yohei SHIMIZU, Yasutomi MATSUSHIMA, Junichi TANIGUCHI
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Patent number: 10400372Abstract: Use of an electrically charged nonwoven fabric that is made of a fiber predominantly composed of an amorphous polymer provides a novel filtration material having improved performance compared to that of conventional filtration materials, and having excellent heat resistance and excellent flame retardancy as well as an electrically charged nonwoven fabric for use in the filtration material. It is preferable that the surface charge density is greater than or equal to 1×10?10 coulomb/cm2. It is preferable that the collection efficiency for collecting a dust particle with a particle diameter of 1 ?m flowing at a fabric-passing velocity of 8.6 cm/second is greater than or equal to 40%, the QF value is greater than or equal to 0.05, and the decrement of the dust-particle collection efficiency after being allowed to leave at 100° C. for 24 hours is less than or equal to 10%.Type: GrantFiled: October 26, 2015Date of Patent: September 3, 2019Assignee: KURARAY CO., LTD.Inventors: Yasuhiro Shirotani, Ikuhisa Shiraishi
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Publication number: 20180187352Abstract: Provided are a nonwoven fabric mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. of 100 to 3000 Pa·s, and satisfying conditions of: 1) an average fiber diameter of 0.5 to 5 ?m; 2) an air permeability of more than or equal to 20 seconds/100 mL; and 3) a withstand voltage of more than or equal to 15 kV/mm, an insulating material using the nonwoven fabric, and a method for manufacturing the nonwoven fabric including continuously treating fibers between a pair of rolls at a temperature of 150 to 300° C. and a linear pressure of 100 to 500 kg/cm.Type: ApplicationFiled: March 24, 2015Publication date: July 5, 2018Applicant: KURARAY CO., LTD.Inventor: Yasuhiro SHIROTANI
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Publication number: 20180187353Abstract: A nonwoven fabric including fibers that contain a polymer having a glass transition temperature of greater than or equal to 50° C. as a main component, and having a vertical strength of greater than or equal to 1 N/5 cm per 1 g/m2, and by satisfying both of the following conditions (1) and (2), a nonwoven fabric having sufficient strength to be handled alone and including fibers that contain a polymer having a Tg of greater than or equal to 50° C. as a main component without performing a post processing such as emboss processing, calender processing, or spunlace processing, and a method for producing the nonwoven fabric can be provided. (1) A density is 0.01 to 0.4 g/cm3. (2) A proportion of parts with a density exceeding 0.4 g/cm3 is less than or equal to 3% in a cross section in a thickness direction.Type: ApplicationFiled: June 30, 2016Publication date: July 5, 2018Applicant: KURARAY CO., LTD.Inventors: Ikuhisa SHIRAISHI, Yasuhiro SHIROTANI
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Patent number: 9963810Abstract: With a nonwoven fabric made of fibers mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. from 100 to 3000 Pa·s and an average fiber diameter from 1 to 10 ?m, a nonwoven fabric which is excellent in flame retardancy and can have a small thickness within a range from 5 to 900 ?m with strength being maintained because of its denseness can be provided.Type: GrantFiled: June 26, 2014Date of Patent: May 8, 2018Assignee: KURARAY CO., LTD.Inventors: Masahiro Sasaki, Yasuhiro Shirotani
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Publication number: 20170350049Abstract: Use of an electrically charged nonwoven fabric that is made of a fiber predominantly composed of an amorphous polymer provides a novel filtration material having improved performance compared to that of conventional filtration materials, and having excellent heat resistance and excellent flame retardancy as well as an electrically charged nonwoven fabric for use in the filtration material. It is preferable that the surface charge density is greater than or equal to 1×10?10 coulomb/cm2. It is preferable that the collection efficiency for collecting a dust particle with a particle diameter of 1 ?m flowing at a fabric-passing velocity of 8.6 cm/second is greater than or equal to 40%, the QF value is greater than or equal to 0.05, and the decrement of the dust-particle collection efficiency after being allowed to leave at 100° C. for 24 hours is less than or equal to 10%.Type: ApplicationFiled: October 26, 2015Publication date: December 7, 2017Applicant: KURARAY CO., LTD.Inventors: Yasuhiro SHIROTANI, Ikuhisa SHIRAISHI
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Publication number: 20170298547Abstract: A web is formed by integrating continuous fibers produced by melt-spinning, at a temperature of 220° C. or lower, polyvinyl butyral pellets having a butyralization degree of 50 to 90 mass %, an MFR of 0.5 to 45 g/10 min at 150° C. and 2.16 kgf, an acid value of 0.12 mgKOH/g or less, and a 1-butanal content of 5 mass ppm or less, to give a meltblown nonwoven fabric or a spunbonded nonwoven fabric having a 1-butanal content of 10 mass ppm or less. The present invention thus provides a nonwoven fabric formed from PVB continuous fibers whose distinct odor is suppressed, and a manufacturing method therefor.Type: ApplicationFiled: September 25, 2015Publication date: October 19, 2017Applicant: KURARAY CO., LTD.Inventors: Masahiro SASAKI, Yasuhiro SHIROTANI
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Publication number: 20170275793Abstract: Provided is a conductive nonwoven fabric, including a meltblown nonwoven fabric made from a melt liquid-crystal-forming wholly aromatic polyester having a melt viscosity at 310° C. of less than or equal to 20 Pa·s and satisfying (A) an average fiber diameter from 0.1 ?m to 5 ?m, (B) two or less film-like objects existing per 1 mm2 of the nonwoven fabric, (C) a breaking length in a warp direction of greater than or equal to 10 km and a breaking length in a weft direction of greater than or equal to 6 km, (D) a basis weight from 1.0 g/m2 to 15 g/m2, (E) a thickness from 5 ?m to 50 ?m, and (F) an air permeability of less than or equal to 300 cc/cm2/second, and a metal coating film formed on the meltblown nonwoven fabric.Type: ApplicationFiled: August 22, 2014Publication date: September 28, 2017Applicant: KURARAY CO., LTD.Inventors: Yasuhiro SHIROTANI, Kimihiko HOUHASHI, Kazuo OHIRA
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Publication number: 20160145782Abstract: With a nonwoven fabric made of fibers mainly composed of amorphous polyetherimide having a melt viscosity at 330° C. from 100 to 3000 Pa·s and an average fiber diameter from 1 to 10 ?m, a nonwoven fabric which is excellent in flame retardancy and can have a small thickness within a range from 5 to 900 ?m with strength being maintained because of its denseness can be provided.Type: ApplicationFiled: June 26, 2014Publication date: May 26, 2016Applicant: KURARAY CO., LTD.Inventors: Masahiro SASAKI, Yasuhiro SHIROTANI
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Publication number: 20160002826Abstract: To provide: a fiber having excellent adhesiveness, which is able to be bonded to a polar resin, a resin containing an inorganic filler (especially a glass fiber), a ceramic, glass, a metal or the like, without being subjected to a primer treatment or the like; and a nonwoven fabric. A fiber which is formed of a thermoplastic polymer composition that contains (A) a block copolymer which has (a1) at least one polymer block containing a aromatic vinyl compound unit and (a2) at least one polymer block containing a conjugated diene compound unit, (B) a polyvinyl acetal resin and (C) a compatibilizer, said thermoplastic polymer composition containing 5-100 parts by mass of the compatibilizer (C) per 100 parts by mass of the block copolymer (A).Type: ApplicationFiled: February 20, 2014Publication date: January 7, 2016Applicant: KURARAY CO., LTD.Inventors: Hiromichi NAKATA, Asako MINAMIDE, Masanori TOMOI, Yasuhiro SHIROTANI
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Patent number: 8818251Abstract: A cleaning web for cleaning the surface of articles to be cleaned, produced by impregnating a web for cleaning the surface of articles to be cleaned with an oil, wherein the web is a nonwoven fabric containing a melt-liquid-crystal-forming wholly aromatic polyester having a melt viscosity of 20 Pa·s or less at 310° C. as the principal component that is produced by melt-blown method.Type: GrantFiled: June 11, 2007Date of Patent: August 26, 2014Assignees: Kuraray Co., Ltd., Tachibana Shoten Co., Ltd., McYamasan Polymers Co., Ltd.Inventors: Hiromi Furuya, Yuu Miyaguchi, Yasuhiro Shirotani, Kouji Sugimoto