Patents by Inventor Shigeo Nishikawa

Shigeo Nishikawa 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: 11491760
    Abstract: The breathable sheet of the present invention is comprised of a 4-methyl-1-pentene-based polymer or a resin composition containing the 4-methyl-1-pentene-based polymer as a main component. In addition, the breathable sheet of the present invention is preferably selected from the group consisting of a net, a mesh, a non-woven fabric, a woven fabric, and a perforated sheet.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: November 8, 2022
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Shigeo Nishikawa, Katsuyuki Kajihara, Satoshi Noma
  • Patent number: 11402282
    Abstract: Provided is a piezoelectric substrate including: an elongate conductor; and an elongate first piezoelectric material helically wound in one direction around the conductor, in which the first piezoelectric material includes an optically active helical chiral polymer (A), the lengthwise direction of the first piezoelectric material and the principal orientation direction of the helical chiral polymer (A) included in the first piezoelectric material are substantially parallel to each other, and the first piezoelectric material has an orientation degree of F. in a range of from 0.5 to less than 1.0, determined from X-ray diffraction measurement by the following Formula (a): orientation degree F.=(180°??)/180°??(a) (in Formula (a), ? represents a half width of a peak derived from orientation).
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: August 2, 2022
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Mitsunobu Yoshida, Kazuhiro Tanimoto, Katsuki Onishi, Shigeo Nishikawa
  • Publication number: 20210046731
    Abstract: The breathable sheet of the present invention is comprised of a 4-methyl-1-pentene-based polymer or a resin composition containing the 4-methyl-1-pentene-based polymer as a main component. In addition, the breathable sheet of the present invention is preferably selected from the group consisting of a net, a mesh, a non-woven fabric, a woven fabric, and a perforated sheet.
    Type: Application
    Filed: March 7, 2019
    Publication date: February 18, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Shigeo NISHIKAWA, Katsuyuki KAJIHARA, Satoshi NOMA
  • Patent number: 10503305
    Abstract: An electronic device with pressing input function has a substantially rectangular parallelepiped-shaped housing. A display panel with pressure sensor and an arithmetic circuit module are disposed in the housing. The display panel with pressure sensor is composed of a pressure sensor and a display panel. In the display panel, a front polarizing plate is disposed on a front face of a liquid crystal panel. In the pressure sensor, electrodes are formed on both respective flat plate faces of a piezoelectric film having birefringence. The pressure sensor is disposed between the liquid crystal panel and the front polarizing plate of the display panel, and a uniaxial drawing direction of the piezoelectric film is parallel to a polarizing direction of the front polarizing plate.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: December 10, 2019
    Assignees: MURATA MANUFACTURING CO., LTD., MITSUI CHEMICALS, INC.
    Inventors: Masamichi Ando, Kazuhiro Tanimoto, Mitsunobu Yoshida, Shigeo Nishikawa
  • Publication number: 20190267538
    Abstract: The present invention provides: a piezoelectric substrate which includes a first piezoelectric body having an elongated shape and helically wound in one direction, and which does not include a core material, in which the first piezoelectric body includes a helical chiral polymer (A) having an optical activity; in which the length direction of the first piezoelectric body is substantially parallel to the main direction of orientation of the helical chiral polymer (A) included in the first piezoelectric body; and in which the first piezoelectric body has a degree of orientation F, as measured by X-ray diffraction according to the following Equation (a), within the range of 0.5 or more but less than 1.0: degree of orientation F=(180°??)/180°??(a) (in which ? represents the half-value width of the peak derived from the orientation).
    Type: Application
    Filed: June 5, 2017
    Publication date: August 29, 2019
    Applicants: MITSUI CHEMICALS, INC., MURATA MANUFACTURING CO., LTD.
    Inventors: Mitsunobu YOSHIDA, Kazuhiro TANIMOTO, Katsuki ONISHI, Shigeo NISHIKAWA, Masamichi ANDO
  • Patent number: 10190924
    Abstract: A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant d14 of 1 pC/N or more as measured at 25° C. using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 29, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhiro Tanimoto, Mitsunobu Yoshida, Shigeo Nishikawa, Masamichi Ando, Hidekazu Kano
  • Publication number: 20190003905
    Abstract: Provided is a piezoelectric substrate including: an elongate conductor; and an elongate first piezoelectric material helically wound in one direction around the conductor, in which the first piezoelectric material includes an optically active helical chiral polymer (A), the lengthwise direction of the first piezoelectric material and the principal orientation direction of the helical chiral polymer (A) included in the first piezoelectric material are substantially parallel to each other, and the first piezoelectric material has an orientation degree of F in a range of from 0.5 to less than 1.0, determined from X-ray diffraction measurement by the following Formula (a): orientation degree F.=(180°??)/180°??(a) (in Formula (a), ? represents a half width of a peak derived from orientation).
    Type: Application
    Filed: December 22, 2016
    Publication date: January 3, 2019
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Mitsunobu YOSHIDA, Kazuhiro TANIMOTO, Katsuki ONISHI, Shigeo NISHIKAWA
  • Patent number: 10126473
    Abstract: Provided is a display device containing a crystalline piezoelectric polymer layer having a helical chiral polymer (A) that has a weight average molecular weight of from 50,000 to 1,000,000 and has optical activity, an optical compensation layer satisfying the following expression (1), and a linear polarizer. In expression (1), Xc represents a degree of crystallinity (%) of the crystalline piezoelectric polymer layer obtained by a DSC method; MORc represents a standardized molecular orientation of the crystalline piezoelectric polymer layer measured by a microwave transmission molecular orientation meter when a reference thickness is 50 ?m; d represents a thickness (?m) of the crystalline piezoelectric polymer layer; and Rth represents a phase difference (nm) in a thickness direction of the optical compensation layer at a wavelength of 550 nm. |0.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: November 13, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhiro Tanimoto, Mitsunobu Yoshida, Shigeo Nishikawa
  • Publication number: 20180269377
    Abstract: A layered body including: a crystalline polymeric piezoelectric body having a standardized molecular orientation MORc of from 2.0 to 10.0 measured by a microwave transmission-type molecular orientation meter based on a reference thickness of 50 ?m; and a surface layer which is disposed so that at least a part of the surface layer contacts the crystalline polymeric piezoelectric body, which has a surface resistivity of from 1×106 ?/sq to 1×1012 ?/sq, and which contains an electroconductive material (A) and a polymer (B).
    Type: Application
    Filed: December 2, 2015
    Publication date: September 20, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro TANIMOTO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA
  • Patent number: 10031606
    Abstract: The invention provides a pressure detecting device containing a pressurized member having a contact surface that is subjected to pressure due to contact with a pressurizing means; and a piezoelectric member that is arranged facing the pressurized member and that includes a polymeric piezoelectric material having a piezoelectric constant d14 of 1 pm/V or more as measured by a displacement method at 25° C., and a ratio IEb/IEa between a product IEb of a cross-sectional secondary moment Ib and a Young's modulus Eb of the pressurized member, and a product IEa of a cross-sectional secondary moment Ia and a Young's modulus Ea of the piezoelectric member, is in a range of from 102 to 1010.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 24, 2018
    Assignees: MITSUI CHEMICALS, INC., MURATA MANUFACTURING CO., LTD.
    Inventors: Mitsunobu Yoshida, Kazuhiro Tanimoto, Shigeo Nishikawa
  • Patent number: 9966526
    Abstract: A piezoelectric device is provided that includes a polymer piezoelectric material having at least one film-like layer; a first electric conductor provided on a principal surface of the polymer piezoelectric material; a second electric conductor provided on a surface of the polymer piezoelectric material at an opposite side from the first electric conductor on the principal surface; a first end surface electric conductor provided on one end surface in a width direction of the polymer piezoelectric material and disposed so as to be conductively connected to the first electric conductor and so as not to be in contact with the second electric conductor; and a second end surface electric conductor provided on any other end surface that is not the one end surface of the polymer piezoelectric material and disposed in a defined manner.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: May 8, 2018
    Assignees: MITSUI CHEMICALS, INC., MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhiro Tanimoto, Mitsunobu Yoshida, Masaki Shimizu, Shigeo Nishikawa, Yoshiro Tajitsu
  • Patent number: 9905750
    Abstract: Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 ?m and the crystallinity is from 25 to 250.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: February 27, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Mitsunobu Yoshida, Shigeo Nishikawa, Masaki Shimizu, Hiroshi Fukuda
  • Publication number: 20170250336
    Abstract: A polymeric piezoelectric material, comprising at least two regions: a region H, which is an oriented polymeric piezoelectric region that includes an optically active helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000, the region H having a crystallinity of from 20% to 80% and having a standardized molecular orientation-of from 3.5 to 15.0; and a region L, which is a low orientation region that includes the optically active helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000, the region L being present near at least part of an end portion of the region H, having an average width when viewed from a normal direction with respect to the principal plane of the region H of from 10 ?m to 300 ?m, and having a retardation is 100 nm or less.
    Type: Application
    Filed: June 24, 2015
    Publication date: August 31, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro TANIMOTO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA
  • Patent number: 9559289
    Abstract: A polymeric piezoelectric material is provided that includes an aliphatic polyester (A) with a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, and a stabilizing agent (B) with a weight-average molecular weight of from 200 to 60,000 having at least one kind of functional group selected from the group consisting of a carbodiimide group, an epoxy group and an isocyanate group, wherein the crystallinity of the material obtained by a DSC method is from 20% to 80%, a content of the stabilizing agent (B) is from 0.01 part by mass to 10 parts by mass with respect to 100 parts by mass of the aliphatic polyester (A), and internal haze with respect to visible light is 50% or less, as well as a process for producing the same.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: January 31, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro Tanimoto, Mitsunobu Yoshida, Shigeo Nishikawa, Masaki Shimizu
  • Publication number: 20160380180
    Abstract: Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 ?m and the crystallinity is from 25 to 250.
    Type: Application
    Filed: September 13, 2016
    Publication date: December 29, 2016
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Mitsunobu YOSHIDA, Shigeo NISHIKAWA, Masaki SHIMIZU, Hiroshi FUKUDA
  • Publication number: 20160284977
    Abstract: There is provided a polymeric piezoelectric material including a helical chiral polymer (A) having a weight-average molecular weight of from 50,000 to 1,000,000 and an optical purity of more than 97.0% ee but less than 99.8% ee as calculated by the following formula, in which a piezoelectric constant d14 measured at 25° C. by a stress-charge method is 1 pC/N or more: optical purity(% ee)=100×|L-form amount?D-form amount|/(L-form amount+D-form amount), ??Formula: [in which an amount of L-form (% by mass) and an amount of D-form of an optically active polymer (% by mass) are values obtained by a method using high-performance liquid chromatography (HPLC)].
    Type: Application
    Filed: November 10, 2014
    Publication date: September 29, 2016
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro TANIMOTO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA
  • Publication number: 20160238466
    Abstract: A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant d14 of 1 pC/N or more as measured at 25° C. using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer.
    Type: Application
    Filed: September 25, 2014
    Publication date: August 18, 2016
    Applicants: MITSUI CHEMICAL, INC., Murata Manufacturing Co., Ltd
    Inventors: Kazuhiro TANIMOTO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA, Masamichi ANDO, Hidekazu KANO
  • Publication number: 20160204337
    Abstract: A layered body including a polymeric piezoelectric body which includes an optically active aliphatic polyester (A) having a weight average molecular weight of from 50,000 to 1,000,000 and has crystallinity obtained by a DSC method, of from 20% to 80%, and a layer (X) which is in contact with the polymeric piezoelectric body and has an acid value of 10 mg KOH/g or less.
    Type: Application
    Filed: August 29, 2014
    Publication date: July 14, 2016
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro TANIMOTO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA
  • Publication number: 20160130388
    Abstract: A crystallized polymer film including a polymer (A) that has a weight-average molecular weight of from 50,000 to 1,000,000 and a crystallization half time at the temperature at which the polymer crystallizes fastest in a range of from 180 seconds to 900 seconds; having a crystallinity of from 20% to 80% as obtained by a DSC method; and having a difference between a total haze and an internal haze of 0.8% or less in a case in which the total haze and the internal haze are measured at 25° C. in accordance with JIS-K7105.
    Type: Application
    Filed: July 17, 2014
    Publication date: May 12, 2016
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Shigeo NISHIKAWA, Mitsunobo YOSHIDA
  • Publication number: 20160099403
    Abstract: A layered body including a crystalline polymeric piezoelectric body, which is molecularly oriented, and a surface layer, in which the relationship between the tensile modulus Ec (GPa) and the thickness d (?m) satisfies the following Formula (A): 0.6?Ec/d ??Formula (A).
    Type: Application
    Filed: April 9, 2014
    Publication date: April 7, 2016
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kazuhiro TANIMOTO, Yohsuke ASANO, Mitsunobu YOSHIDA, Shigeo NISHIKAWA