Patents Assigned to Kuraray Co., Ltd.
  • Publication number: 20220143959
    Abstract: The present invention relates to a multilayer structure at least an outer layer and an inner layer which contain a polypropylene resin as a main component, a barrier resin layer containing an ethylene-vinyl alcohol copolymer as a main component, and a metal deposited layer containing aluminum as a main component; a packaging material for a retort therewith; a method for recovering the multilayer structure; and a recovered composition comprising a recovered material of the multilayer structure. There is provided a multilayer structure exhibiting excellent recyclability and excellent appearance, gas barrier ability and shading performance both before and after retorting treatment, and a packaging material for a retort therewith.
    Type: Application
    Filed: March 9, 2020
    Publication date: May 12, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Kentaro Yoshida, Makoto Suzuki
  • Publication number: 20220143572
    Abstract: The present invention relates to an activated carbon, having a pore volume (A) of 0.3 to 0.7 mL/g at a pore diameter of 6.5 to 50 nm as determined by mercury intrusion porosimetry, a pore volume (B) of 0.23 mL/g or less at a pore diameter of 750 to 4,000 nm as determined by mercury intrusion porosimetry, and a pore volume ratio (A)/(B) of 1.7 or higher.
    Type: Application
    Filed: February 14, 2020
    Publication date: May 12, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Hiroaki KITATOMI, Mitsunori NISHITA, Mitsunori HITOMI, Takayuki YAMADA
  • Publication number: 20220144977
    Abstract: A method of producing modified vinyl alcohol-based polymer particles, includes mixing vinyl alcohol-based polymer particles with a mixed medium containing unsaturated carboxylic acid, an acid catalyst, and water, wherein, by mixing the vinyl alcohol-based polymer particles with the mixed medium, the vinyl alcohol-based polymer particles are reacted with the unsaturated carboxylic acid to obtain modified vinyl alcohol-based polymer particles containing a vinyl ester unit represented by a formula (2) below, having a vinyl alcohol unit content based on the total constitutional units from 95 to 99.99 mol %, and having an average particle diameter from 50 to 2000 ?m. The production method does not cause the problem of the residual sulfur content derived from a liquid medium used for reaction and is also capable of modifying the vinyl alcohol-based polymer particles while maintaining the particle shape.
    Type: Application
    Filed: March 12, 2020
    Publication date: May 12, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Yuki TACHIBANA, Yusuke AMANO, Yuki SHIMIZU, Kazuhiko MAEKAWA
  • Patent number: 11325354
    Abstract: Provided is an interlayer film for laminated glass which is excellent in sound insulation property and has improved sound insulation performance not only in a coincidence region but also in a mass-dominated region. The interlayer film for laminated glass includes a sound insulating layer which is formed from a composition (A) containing at least one resin (a1) selected from a thermoplastic resin and a thermosetting resin, wherein a tan ? obtained when a dynamic viscoelasticity of a sheet, which is obtained by molding the composition (A) to have a thickness of 0.8 mm, is measured at a frequency of 0.3 Hz in a tension mode has a maximal value at a temperature TA (° C.), TA (° C.) is in a range of ?50 to 50° C., and the tan ? at TA (° C.) is 2.5 or more.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 10, 2022
    Assignee: KURARAY CO., LTD.
    Inventors: Yoshiaki Asanuma, Takeshi Kusudou
  • Publication number: 20220135301
    Abstract: There is provided a water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in the longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in the transverse direction. This allows provision of a water-soluble film that can be suitably used for manufacturing a package with excellent uniformity of seal strength, even for manufacturing a package with excellent uniformity of seal strength during high-speed sealing; and a package using the film.
    Type: Application
    Filed: January 13, 2022
    Publication date: May 5, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Minoru Okamoto, Sayaka Shimizu, Osamu Kazeto
  • Publication number: 20220135410
    Abstract: The present invention relates to an activated carbon, having a BET specific surface area (A) of 1,250 to 1,800 m2/g as determined from a carbon dioxide adsorption isotherm, and a ratio (B)/(C) of 0.640 or lower between a pore volume (B) mL/g at a pore diameter of 0.4 to 0.7 nm and a pore volume (C) mL/g at a pore diameter of 0.7 to 1.1 nm as determined by performing a grand canonical Monte Carlo simulation on a carbon dioxide adsorption-desorption isotherm.
    Type: Application
    Filed: March 2, 2020
    Publication date: May 5, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Mitsunori NISHITA, Mitsunori HITOMI, Takayuki YAMADA
  • Publication number: 20220134724
    Abstract: The disclosure relates to a multilayer film having an ethylene-vinyl alcohol copolymer (EVOH) layer, and a container type house system having the same.
    Type: Application
    Filed: November 1, 2021
    Publication date: May 5, 2022
    Applicant: Kuraray Co., Ltd.
    Inventor: Edgard Chow
  • Patent number: 11319261
    Abstract: Provided is a method of producing a conjugated diene, including a step of dehydrating a ?,?-unsaturated alcohol in the presence of a solid acid catalyst having a Hammett acidity function (H0) of ?12.2 or less.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: May 3, 2022
    Assignee: KURARAY CO., LTD.
    Inventors: Takahiro Suzuki, Kosuke Senda, Yutaka Suzuki
  • Publication number: 20220128742
    Abstract: A transmission-type or reflection-type diffuser plate including a planar base material on which an optical element having an effective diameter of “a” in an X-axis direction and an effective diameter of “b” in a Y-axis direction is provided to constitute an a×b two-dimensional basic periodic structure, each of the basic periodic structure having an Na×Mb two-dimensional periodic phase structure in which a basic block has N rows and M columns including N optical elements in the X-axis direction and M optical elements in the Y-axis direction, the diffuser plate being configured such that if a phase structure Pnm in the n-th row and the m-th column is expressed by Pn1+P1m, and directivity is represented by square of the absolute value of Fourier transform of complex transmittance or complex reflectance of an optical element in the n-th row and the m-th column in the basic block; a ratio of standard deviation to average of the directivity is 0.3 or less.
    Type: Application
    Filed: January 21, 2020
    Publication date: April 28, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Keisuke IKEDA, Atsushi UCHIDA, Masaru KARAI
  • Publication number: 20220127458
    Abstract: Disclosed are: a tube containing a layer that contains 60 to 80% by mass of a semi-aromatic polyamide and 15 to 40% by mass of an elastomer modified with an unsaturated compound having at least one selected from a carboxy group and an acid anhydride group, wherein the layer has a phase-separated structure containing a phase (A) that contains the semi-aromatic polyamide, and a phase (B) that contains the elastomer, and the phase (A) is a continuous phase and the phase (B) is a disperse phase dispersed in the phase (A), and in a cross-sectional image of the layer as observed with an electron microscope, the average number of the phase (B) having a major axis diameter of 2 ?m or more and existing per 100 square ?m is 1/100 ?m2 or less; and a polyamide resin composition prepared by melt-kneading a semi-aromatic polyamide and an elastomer modified with an unsaturated compound having at least one selected from a carboxy group and an acid anhydride group, wherein the total concentration of the carboxy group and the
    Type: Application
    Filed: February 19, 2020
    Publication date: April 28, 2022
    Applicant: KURARAY CO., LTD.
    Inventor: Kenji SEKIGUCHI
  • Publication number: 20220119991
    Abstract: A liquid crystal polyester multifilament has an initial modulus variation of 3.0% or less and a tensile strength of 18 cN/dtex or more.
    Type: Application
    Filed: February 17, 2020
    Publication date: April 21, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Keiichi IKEHATA, Junya IDE
  • Publication number: 20220112630
    Abstract: Provided is an electroconductive composite fiber having excellent antistatic capability and cationic dyability as well as a fiber structure including the same. The electroconductive composite fiber at least includes an electroconductive layer and a non-electroconductive layer disposed in contact with the electroconductive layer, wherein the electroconductive layer contains an electroconductive substance, and the non-electroconductive layer contains a modified polyester comprising a phosphonium-containing dicarboxylic acid component as a copolymerization component.
    Type: Application
    Filed: December 20, 2021
    Publication date: April 14, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Shoji ONOGI, Kohei YAMASAKI, Hitoshi NAKATSUKA
  • Publication number: 20220117083
    Abstract: 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: Application
    Filed: December 18, 2019
    Publication date: April 14, 2022
    Applicants: KURARAY CO., LTD., OSAKA RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Kohei HAYASHI, Soichi OBATA, Yasuhiro SHIROTANI, Masashi NITANI, Mayumi UNO, Kazuki MAEDA
  • Patent number: 11299600
    Abstract: A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10?6 to 9×10?3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: April 12, 2022
    Assignee: KURARAY CO., LTD.
    Inventors: Nobutaka Hiraoka, Toru Abe, Taketomo Yamashita, Takuro Niimura, Atsuhiro Nakahara
  • Publication number: 20220106503
    Abstract: A laminate production method is provided which can sufficiently prevent the occurrence of blocking without causing deterioration in the outstanding characteristics of acrylic block copolymers such as adhesive performance, and can also ensure excellent processability during extrusion.
    Type: Application
    Filed: August 30, 2019
    Publication date: April 7, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Tomohiro ONO, Makoto AKAI, Moe KAWAHARA, Kanayo NAKADA
  • Publication number: 20220105689
    Abstract: Provided are a method for producing a thermoplastic liquid crystal polymer (TLCP) film having an improved thermo-adhesive property, a circuit board, and a method for producing the same. The production method of the TLCP film includes preparing a TLCP film as the adherend film and a TLCP film as the adhesive film; examining each of the prepared TLCP films for a relative intensity calculated as a ratio in percentage of a sum of peak areas of C—O bond peak and COO bond peak based on the total area of C1s peaks in the XPS spectral profile so as to calculate a relative intensity X (%) as for the prepared adherend film and a relative intensity Y (%) as for the prepared adhesive film; and controlling the TLCP film as the adhesive film to have a relative intensity Y by selection or activation treatment of the adhesive film so that the relative intensity X of the adherend film and the relative intensity Y of the controlled adhesive film satisfy the following formulae (1) and (2): 38<X+Y<65 ??(1) ?8.
    Type: Application
    Filed: June 16, 2021
    Publication date: April 7, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Takahiro NAKASHIMA, Minoru ONODERA, Tatsuya SUNAMOTO
  • Patent number: 11291956
    Abstract: The hollow fiber membrane module contains a hollow fiber membrane bundle having bundled hollow fiber membranes, a housing with an internal space formed in which the hollow fiber membrane bundle is housed and a gas supply portion which disperses cleaning gas for the hollow fiber membrane in the internal space. The internal space has an upper space in which an upper-side part of the hollow fiber membrane is positioned and a lower space in which a lower-side part of the hollow fiber membrane is positioned. The gas supply portion is provided with pipe vent holes which disperse gas in the housing at a position in the upper space and diffusing vent holes which disperse gas in the housing at a position below the lower space.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 5, 2022
    Assignee: Kuraray Co., Ltd.
    Inventors: Hiroki Nakanishi, Koji Miyake, Kazuma Inoue
  • Patent number: 11291947
    Abstract: Provided is a composition for removing a sulfur-containing compound present in liquid or vapor, the sulfur-containing compound being hydrogen sulfide, an —SH group-containing compound or a mixture thereof, the composition containing an ?,?-unsaturated aldehyde represented by the following general formula (1) as an active ingredient; wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms, or are connected to each other to represent an alkylene group having 2 to 6 carbon atoms; and R3 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or is connected to R1 to represent an alkylene group having 2 to 6 carbon atoms.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: April 5, 2022
    Assignee: KURARAY CO., LTD.
    Inventors: Masaki Shimizu, Yuusuke Saitou, Takuo Tsuruta, Takahiro Suzuki, Junichi Fuji
  • Publication number: 20220098347
    Abstract: Provided is a hydrogel-forming composition capable of forming a sterilized hydrogel having a high mechanical strength. Also provided are a hydrogel using the hydrogel-forming composition, and a method for producing the hydrogel-forming composition. The hydrogel-forming composition contains a vinyl alcohol polymer having an ethylenically unsaturated group and having a polymerization degree of 450 or more, in which the ethylenically unsaturated group introduction ratio is 0.01 to 10 mol % in all the structural units constituting the vinyl alcohol polymer, and in which no microorganisms detectable by the sterility test method (direct method) specified in the general test methods of the Japanese Pharmacopoeia are present.
    Type: Application
    Filed: January 21, 2020
    Publication date: March 31, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Akio FUJITA, Goro KOBAYASHI
  • Publication number: 20220091325
    Abstract: A plastic scintillating fiber capable of detecting radiation having a weakly penetrating property is provided. A plastic scintillating fiber according to an aspect of the present invention includes a plastic optical fiber, and further includes a core containing at least one type of a fluorescent agent, a cladding layer having a refractive index lower than that of the core disposed at a center, and an outermost layer covering an outer peripheral surface of the cladding layer. The outermost layer contains a base material that generates scintillation light, and at least one type of a fluorescent agent that converts the scintillation light into light having a wavelength longer than that of the scintillation light.
    Type: Application
    Filed: January 8, 2020
    Publication date: March 24, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Masashi AKARI, Katsuhiro FUJITA