Patents by Inventor Kenji Iwashita

Kenji Iwashita 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: 20210363668
    Abstract: A task is to provide a cloth which is advantageous in that the cloth has extremely excellent flame retardancy, and further has excellent washing shrinkage resistance and excellent hand as well as excellent antistatic properties, preferably in that the whole of the cloth can be uniformly dyed, and a fiber product, and the task is achieved by obtaining a cloth using a spun yarn which comprises a meta-type wholly aromatic polyamide fiber, a modacrylic fiber, and a conductive fiber.
    Type: Application
    Filed: March 25, 2019
    Publication date: November 25, 2021
    Applicant: TEIJIN LIMITED
    Inventors: Hiroki SHIMADA, Kenji IWASHITA, Kiho NABETANI
  • Patent number: 11160320
    Abstract: The invention addresses the problem of providing a cloth, a multilayered cloth, and a textile product, which have flame retardancy and heat insulation and develop a relief structure when exposed to flame or heat. As a means for resolution, a cloth characterized in that a yarn A having a high thermal shrinkage rate and a yarn B having a low thermal shrinkage rate are alternately arranged in the warp direction or weft direction is obtained, then, as necessary, a multilayered cloth is obtained using the cloth as an intermediate layer, and further, as necessary, a textile product is formed using the multilayered cloth.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: November 2, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Kiho Nakano, Kenji Iwashita
  • Patent number: 11118287
    Abstract: The invention addresses the problem of providing a cloth and a protective product that have lightweight properties, wearing comfort, and further protection performance against electric arcs. A means for resolution is a cloth including a spun yarn containing a meta-type wholly aromatic polyamide fiber, wherein the cloth has a lightness index L-value of 25 or less.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 14, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Hiroki Shimada, Kenji Iwashita
  • Patent number: 11078608
    Abstract: The invention addresses the problem of providing a cloth that is excellent not only in flame retardancy and antistatic properties but also in appearance quality and preferably also has protection performance against electric arcs, a method for producing the same, and a textile product. A means for resolution is a cloth including a meta-type wholly aromatic polyamide fiber and an electrically conductive fiber, wherein both the meta-type wholly aromatic polyamide fiber and the electrically conductive fiber are colored.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: August 3, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Kengo Tanaka, Hiroki Shimada, Kenji Iwashita, Kenji Yoshihara
  • Publication number: 20200063299
    Abstract: The invention addresses the problem of providing a cloth that is excellent not only in flame retardancy and antistatic properties but also in appearance quality and preferably also has protection performance against electric arcs, a method for producing the same, and a textile product. A means for resolution is a cloth including a meta-type wholly aromatic polyamide fiber and an electrically conductive fiber, wherein both the meta-type wholly aromatic polyamide fiber and the electrically conductive fiber are colored.
    Type: Application
    Filed: October 25, 2017
    Publication date: February 27, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Kengo TANAKA, Hiroki SHIMADA, Kenji IWASHITA, Kenji YOSHIHARA
  • Publication number: 20190226122
    Abstract: A problem of the invention is to provide a colored organic fiber that has a deep color and excellent flame retardancy, a cloth and garments each composed of the foregoing organic fiber, and a method for producing a cloth. To solve this problem, a colored organic fiber having a content of a carrier agent of 1.8% by mass or less relative to the fiber mass is provided. A cloth or garments are obtained, if desired.
    Type: Application
    Filed: April 3, 2019
    Publication date: July 25, 2019
    Applicant: TEIJIN LIMITED
    Inventors: Hiroki SHIMADA, Saori KURODA, Kenji IWASHITA
  • Publication number: 20190029335
    Abstract: The invention addresses the problem of providing a cloth, a multilayered cloth, and a textile product, which have flame retardancy and heat insulation and develop a relief structure when exposed to flame or heat. As a means for resolution, a cloth characterized in that a yarn A having a high thermal shrinkage rate and a yarn B having a low thermal shrinkage rate are alternately arranged in the warp direction or weft direction is obtained, then, as necessary, a multilayered cloth is obtained using the cloth as an intermediate layer, and further, as necessary, a textile product is formed using the multilayered cloth.
    Type: Application
    Filed: March 29, 2017
    Publication date: January 31, 2019
    Applicant: Teijin Limited
    Inventors: Kiho NAKANO, Kenji IWASHITA
  • Publication number: 20180347079
    Abstract: The invention addresses the problem of providing a cloth and a protective product that have lightweight properties, wearing comfort, and further protection performance against electric arcs. A means for resolution is a cloth including a spun yarn containing a meta-type wholly aromatic polyamide fiber, wherein the cloth has a lightness index L-value of 25 or less.
    Type: Application
    Filed: November 11, 2016
    Publication date: December 6, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Hiroki SHIMADA, Kenji IWASHITA
  • Patent number: 9970133
    Abstract: Provided are a woven fabric having excellent lightweightness and water resistance and a garment using the woven fabric. The woven fabric has an areal weight of 100 g/m2 or less and a cover factor of 1,800 or more. One of the warp and weft of the woven fabric contains a false-twist crimped yarn, and the other contains a non-crimped yarn.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: May 15, 2018
    Assignee: TEIJIN FRONTIER CO., LTD.
    Inventors: Akio Ukuma, Kenji Iwashita
  • Publication number: 20180080153
    Abstract: An object is to provide a cloth tape having flame retardancy and a fiber product, and means for achieving the object is a cloth tape formed from an organic fiber, which has an afterflame time of 2.0 seconds or less, as measured in the flammability prescribed in JIS L1091-1999 A-4 method (12-second heating method).
    Type: Application
    Filed: January 24, 2017
    Publication date: March 22, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Kenji IWASHITA, Kiho NAKANO
  • Publication number: 20170292210
    Abstract: In order to provide a fabric and a fiber product, which have hygroscopicity and durability as well as flame retardancy, a hydrophilizing agent is added to a fabric containing aramid fibers.
    Type: Application
    Filed: August 26, 2015
    Publication date: October 12, 2017
    Applicant: TEIJIN LIMITED
    Inventor: Kenji IWASHITA
  • Publication number: 20170037543
    Abstract: A problem of the invention is to provide a colored organic fiber that has a deep color and excellent flame retardancy, a cloth and garments each composed of the foregoing organic fiber, and a method for producing a cloth. To solve this problem, a colored organic fiber having a content of a carrier agent of 1.8% by mass or less relative to the fiber mass is provided. A cloth or garments are obtained, if desired.
    Type: Application
    Filed: April 6, 2015
    Publication date: February 9, 2017
    Applicant: TEIJIN LIMITED
    Inventors: Hiroki SHIMADA, Saori KURODA, Kenji IWASHITA
  • Patent number: 9127380
    Abstract: A water-repellent woven fabric having excellent water repellency, which is friendly to the environment, and a garment made of the water-repellent woven fabric are provided. A composite yarn containing a false-twist crimped textured yarn having an S-direction torque and a false-twist crimped textured yarn having a Z-direction torque is arranged for a warp or a weft to obtain a fabric, and a fluorine-based water repellent having a total concentration of perfluorooctanoic acid and perfluorooctanesulfonic acid of 0 to 5 ng/g is then adhered to the woven fabric.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: September 8, 2015
    Assignee: TEIJIN FRONTIER CO., LTD.
    Inventor: Kenji Iwashita
  • Publication number: 20130239289
    Abstract: A water-repellent woven fabric having excellent water repellency, which is friendly to the environment, and a garment made of the water-repellent woven fabric are provided. A composite yarn containing a false-twist crimped textured yarn having an S-direction torque and a false-twist crimped textured yarn having a Z-direction torque is arranged for a warp or a weft to obtain a fabric, and a fluorine-based water repellent having a total concentration of perfluorooctanoic acid and perfluorooctanesulfonic acid of 0 to 5 ng/g is then adhered to the woven fabric.
    Type: Application
    Filed: December 21, 2011
    Publication date: September 19, 2013
    Applicant: TEIJIN FRONTIER CO., LTD.
    Inventor: Kenji Iwashita
  • Publication number: 20130177753
    Abstract: Provided are a woven fabric having excellent lightweightness and water resistance and a garment using the woven fabric. The woven fabric has an areal weight of 100 g/m2 or less and a cover factor of 1,800 or more. One of the warp and weft of the woven fabric contains a false-twist crimped yarn, and the other contains a non-crimped yarn.
    Type: Application
    Filed: November 14, 2011
    Publication date: July 11, 2013
    Applicant: TEIJIN FRONTIER CO., LTD.
    Inventors: Akio Ukuma, Kenji Iwashita
  • Patent number: 8108949
    Abstract: Waterproof moisture-permeable fabric for clothing which includes, on one side of a polyester fabric A, a waterproof moisture-permeable layer B including a colorless transparent polyester film stacked, and a white or gray resin C partially stacked, and clothing including the waterproof moisture-permeable fabric. Preferably, a moisture-permeable polymer resin D containing inorganic fine particles is stacked on the waterproof moisture-permeable layer B, and the white or gray resin C is partially stacked thereon.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: February 7, 2012
    Assignee: Teijin Fibers Limited
    Inventors: Kenji Iwashita, Hitoshi Itai, Motoki Yamazawa
  • Publication number: 20100071112
    Abstract: The invention provides a waterproof moisture-permeable fabric for clothing which includes, on one side of a polyester fabric A, a waterproof moisture-permeable layer B including a colorless transparent polyester film stacked, and a white or gray resin C partially stacked, and clothing including the waterproof moisture-permeable fabric. Preferably, a moisture-permeable polymer resin D containing inorganic fine particles is stacked on the waterproof moisture-permeable layer B, and the white or gray resin C is partially stacked thereon.
    Type: Application
    Filed: October 24, 2007
    Publication date: March 25, 2010
    Applicant: TEIJIN FIBERS LIMITED
    Inventors: Kenji Iwashita, Hitoshi Itai, Motoki Yamazawa
  • Publication number: 20070004303
    Abstract: A stretchable composite fabric appropriate to sports wear and under wear is a woven or knitted fabric including a composite yarns (A) formed from stretchable yarns (1) having a self-elongation of 5% or more upon absorbing water and an elongation at break of 200% or more and non-stretchable yarns (2) having a self-elongation less than 5% upon absorbing water, and yarns (B) including stretchable yarns (3) having a self-elongation less than 5% upon absorbing water and an elongation at break of 30% or more, wherein the yarns (1) and (2) in a sample taken from the composite fabric respectively have a length L1 and a length L2, the ratio L1/L2 is 0.9 or less, and the yarns (1) can self-elongate upon absorbing water and shrink upon drying.
    Type: Application
    Filed: October 18, 2004
    Publication date: January 4, 2007
    Inventors: Kengo Tanaka, Kenji Iwashita
  • Publication number: 20060060257
    Abstract: A three-dimensional woven fabric comprising a surface layer having a woven structure, a back layer having a woven structure, and a bonding layer having a woven structure and corrugated in a wave-like shape in the warp direction or weft direction, wherein a conjugated yarn composed of two or more constituents, of which one constituent is a polyester multifilament yarn with individual filament size of 0.05-1.5 dtex and comprising 30-150 filaments, is woven as either or both the warp yarn and weft yarn of the surface layer and back layer.
    Type: Application
    Filed: December 1, 2003
    Publication date: March 23, 2006
    Inventor: Kenji Iwashita
  • Patent number: 6887411
    Abstract: A polyester blended yarn giving a woven or knitted fabric exhibiting a swollen touch and a high grade texture is stably obtained by melt-spinning a polyester including A including a substrate polymer including a polyester and 0.5 to 5.0 percent by weight of a polymer P, and the substrate polymer from an identical spinneret or different spinnerets to obtain the filament group A including the polyester composition A and the filament group B including the substrate polymer, blowing cooling air on the filament groups B and A at a speed of 0.20 to 0.80 m/sec and at a speed of not less than 1.1 times said speed, respectively, to once separately cool and solidify the filament groups B and A, doubling the cooled filament groups, and then taking off the obtained doubled yarn at a speed of not less than 2,500 m/min.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: May 3, 2005
    Assignee: Teijin Limited
    Inventors: Hiroyuki Osaka, Hideki Beppu, Kenji Iwashita