Patents by Inventor Hisaaki Terashima
Hisaaki Terashima 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: 11963454Abstract: To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.Type: GrantFiled: October 19, 2018Date of Patent: April 16, 2024Assignee: KUREHA CORPORATIONInventors: Yusuke Sato, Hisaaki Terashima, Nobufumi Sato, Kazuyuki Kanno, Keiko Aita
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Publication number: 20230422627Abstract: To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.Type: ApplicationFiled: September 11, 2023Publication date: December 28, 2023Applicant: Kureha CorporationInventors: Yusuke SATO, Hisaaki TERASHIMA, Nobufumi SATO, Kazuyuki KANNO, Keiko AITA
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Publication number: 20210367137Abstract: To provide a piezoelectric body film that can suppress decrease in the piezoelectric constant d31, a method of producing a piezoelectric body film, and a piezoelectric body device. A piezoelectric body film comprising a fluororesin as a piezoelectric material, the fluororesin containing, as a main constituent unit, a repeating unit derived from vinylidene fluoride, a piezoelectric constant d31 of the piezoelectric body film being 20 pC/N or greater, and an extrapolated onset temperature at start of shrinkage determined by TMA measurement being not lower than 90° C. and not higher than 115° C. The difference between piezoelectric constants d31 measured before and after heating the piezoelectric body film at 100° C. for 24 hours relative to the piezoelectric constant d31 before the heating for 24 hours is 20% or less.Type: ApplicationFiled: October 19, 2018Publication date: November 25, 2021Applicant: Kureha CorporationInventors: Yusuke SATO, Hisaaki TERASHIMA, Nobufumi SATO, Kazuyuki KANNO, Keiko AITA
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Patent number: 11136440Abstract: A vinylidene fluoride resin film is produced by using a film composition containing at least a vinylidene fluoride resin and organic particles. The vinylidene fluoride resin film includes a plurality of protrusions on at least one surface thereof. Among the plurality of protrusions, the number of protrusions greater than 0.10 ?m in height from a flat surface at which the protrusions are not present is from 40 to 400, per 0.10 mm2 of the vinylidene fluoride resin film.Type: GrantFiled: January 16, 2018Date of Patent: October 5, 2021Assignee: KUREHA CORPORATIONInventors: Nobufumi Sato, Kazuyuki Kanno, Yusuke Sato, Keiko Aita, Hisaaki Terashima
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Patent number: 10988586Abstract: Provided is a vinylidene fluoride resin film that is produced using a film composition including at least a vinylidene fluoride resin and inorganic particles; and that includes a plurality of protrusions on at least one surface thereof. Among the plurality of protrusions, the number of protrusions greater than 0.10 ?m in height from a flat surface at which the protrusions are not present is from 7.0 to 50 per 0.10 mm2 of the vinylidene fluoride resin film.Type: GrantFiled: January 16, 2018Date of Patent: April 27, 2021Assignee: KUREHA CORPORATIONInventors: Nobufumi Sato, Keiko Aita, Hisaaki Terashima, Kazuyuki Kanno, Yusuke Sato
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Publication number: 20190338091Abstract: Provided is a vinylidene fluoride resin film that is produced using a film composition including at least a vinylidene fluoride resin and inorganic particles; and that includes a plurality of protrusions on at least one surface thereof. Among the plurality of protrusions, the number of protrusions greater than 0.10 ?m in height from a flat surface at which the protrusions are not present is from 7.0 to 50 per 0.10 mm2 of the vinylidene fluoride resin film.Type: ApplicationFiled: January 16, 2018Publication date: November 7, 2019Inventors: Nobufumi SATO, Keiko AITA, Hisaaki TERASHIMA, Kazuyuki KANNO, Yusuke SATO
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Publication number: 20190330431Abstract: A vinylidene fluoride resin film is produced by using a film composition containing at least a vinylidene fluoride resin and organic particles. The vinylidene fluoride resin film includes a plurality of protrusions on at least one surface thereof. Among the plurality of protrusions, the number of protrusions greater than 0.10 ?m in height from a flat surface at which the protrusions are not present is from 40 to 400, per 0.Type: ApplicationFiled: January 16, 2018Publication date: October 31, 2019Inventors: Nobufumi SATO, Kazuyuki KANNO, Yusuke SATO, Keiko AITA, Hisaaki TERASHIMA
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Patent number: 9493891Abstract: A method for producing an undrawn polyglycolic acid-based resin yarn, including: a discharge step of discharging a molten polyglycolic acid-based resin through a spinneret, to thereby form a fibrous polyglycolic acid-based resin; a keeping step of keeping the fibrous polyglycolic acid-based resin for 0.0012 seconds or more after the discharge in an atmosphere having a temperature of not lower than 110.5° C. but not higher than a melting point of the polyglycolic acid-based resin; and a cooling step of cooling the fibrous polyglycolic acid-based resin obtained in the keeping step, to thereby obtain an undrawn polyglycolic acid-based resin yarn.Type: GrantFiled: November 7, 2011Date of Patent: November 15, 2016Assignee: KUREHA CORPORATIONInventors: Kotaku Saigusa, Masahiro Yamazaki, Shunsuke Abe, Hisaaki Terashima, Hiroyuki Sato
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Publication number: 20130224485Abstract: A method for producing an undrawn polyglycolic acid-based resin yarn, including: a discharge step of discharging a molten polyglycolic acid-based resin through a spinneret, to thereby form a fibrous polyglycolic acid-based resin; a keeping step of keeping the fibrous polyglycolic acid-based resin for 0.0012 seconds or more after the discharge in an atmosphere having a temperature of not lower than 110.5° C. but not higher than a melting point of the polyglycolic acid-based resin; and a cooling step of cooling the fibrous polyglycolic acid-based resin obtained in the keeping step, to thereby obtain an undrawn polyglycolic acid-based resin yarn.Type: ApplicationFiled: November 7, 2011Publication date: August 29, 2013Applicant: KUREHA CORPORATIONInventors: Kotaku Saigusa, Masahiro Yamazaki, Shunsuke Abe, Hisaaki Terashima, Hiroyuki Sato
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Publication number: 20060280915Abstract: A release film comprising a resin-based material containing a cycloolefin-based resin.Type: ApplicationFiled: February 21, 2006Publication date: December 14, 2006Inventors: Hideki Kitamura, Hisaaki Terashima, Kazuyuki Suzuki, Yasuhiro Suzuki, Mitsuru Ito, Hiroshi Sato, Takeshi Nakadai, Hideo Yusa, Toshimi Murayama
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Publication number: 20060272768Abstract: A release film comprising a resin-based material containing a cycloolefin-based resin.Type: ApplicationFiled: August 11, 2006Publication date: December 7, 2006Inventors: Hideki Kitamura, Hisaaki Terashima, Kazuyuki Suzuki, Yasuhiro Suzuki, Mitsuru Ito, Hiroshi Sato, Takeshi Nakadai, Hideo Yusa, Toshimi Murayama
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Publication number: 20050027076Abstract: As a polymer composition for electrical wire coating is provided a vinylidene fluoride polymer composition, which has such heat-resistance as to withstand the heat generated from a wire in service and exhibits satisfactory flexibility even after the change with the passage of time. The polymer composition for electrical wire coating comprises a vinylidene fluoride copolymer and a vinylidene fluoride homopolymer. The preferable compounding ratio in the polymer composition is in the range of 20 to 80% by weight of a vinylidene fluoride copolymer and 80 to 20% by weight of a vinylidene fluoride homopolymer. The vinylidene fluoride copolymer is preferably one comprising 95 to 70% by weight of vinylidene fluoride and 5 to 30% by weight of a monomer copolymerizable with vinylidene fluoride.Type: ApplicationFiled: October 9, 2002Publication date: February 3, 2005Inventors: Toshiya Mizuno, Masamichi Akatsu, Hisaaki Terashima, Takumi Katsurao, Katsuo Horie
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Patent number: 6749940Abstract: A moistureproof multilayer film, including a composite film having a non-moisture absorbing resin layer and a vapor deposited film of an inorganic oxide or a metal formed on at least one side of the non-moisture absorbing resin layer, the multilayer film having such a layer structure where the vapor deposited film surface of the composite film is laminated through an adhesive layer on a vapor deposited film surface of another composite film or a surface of another non-moisture absorbing resin layer, wherein a total number (n) of the deposited films laminated adjacent to the adhesive layer is 2 to 8, and wherein a moisture permeabihty (W; unit: g/m2.day) as measured under conditions of a temperature of 40° C. and a relative humidity of 100% satisfies a relation represented by equation W≦(1/n)×0.20, and a method for producing the moistureproof multilayer film including heat-treating the multilayer film in a hot dry atmosphere having a temperature lower than 140° C. but not lower than 55° C.Type: GrantFiled: July 16, 2003Date of Patent: June 15, 2004Assignee: Kureha Chemical Industry Co., Ltd.Inventors: Shuji Terasaki, Masamichi Akatsu, Hisaaki Terashima, Yasuhiro Tada
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Patent number: 6432516Abstract: A moistureproof film composed of a transparent multi-layer film having a layer structure that thin metal or nonmetal oxide layers (C) are respectively arranged directly or through an adhesive layer (B) on both sides of a hygroscopic resin layer (A), and having a water vapor transmission rate of at most 0.05 g/m2·24 hr as measured at a temperature of 60° C. and a relative humidity of 90%, and a quantity of water vapor transmission for 50 hours of at most 0.15 g/m2 as measured at a temperature of 40° C. and a relative humidity of 100%, a production process thereof, an EL device sealed with the moistureproof film, and a fabrication process of the EL device.Type: GrantFiled: October 14, 1999Date of Patent: August 13, 2002Assignee: Kureha Kagaku Kogyo K.K.Inventors: Syuji Terasaki, Hisaaki Terashima, Satoru Matsunaga, Masamichi Akatsu