Patents by Inventor Yasuko ISHIKAWA

Yasuko ISHIKAWA 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: 11229560
    Abstract: A stretchable structure of an absorbent article has a first sheet layer of a nonwoven fabric; a second sheet layer of a nonwoven fabric and opposed to one side of the first sheet layer. A plurality of elongated elastically stretchable members are provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. The first sheet layer and the second sheet layer have sheet bonded portions bonded via a hot melt adhesive disposed in a striped pattern that is intermittent in the longitudinal direction of the elastically stretchable members and continuously elongated in the direction intersecting with the elastically stretchable members. One of the first sheet layer and the second sheet layer is a spunbond nonwoven fabric, and the other sheet layer is an air-through nonwoven fabric whose surface on the spunbond nonwoven fabric side is a fluffy surface.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: January 25, 2022
    Assignee: Daio Paper Corporation
    Inventors: Yohei Ono, Yasuko Ishikawa
  • Patent number: 11229556
    Abstract: A first sheet layer is made of a nonwoven fabric; a second sheet layer is made of a nonwoven fabric opposed to one side of the first sheet layer; and a plurality of elongated elastically stretchable members are provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. Both ends of the elastically stretchable members are fixed to at least one of the first sheet layer and the second sheet layer via a first hot melt adhesive. The first sheet layer and the second sheet layer are bonded via a second hot melt adhesive in a range in the stretchable direction corresponding to a space between the both ends of the elastically stretchable member. The holding power of the first hot melt adhesive is higher than the second hot meld adhesive.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: January 25, 2022
    Assignee: Daio Paper Corporation
    Inventor: Yasuko Ishikawa
  • Patent number: 11173076
    Abstract: A stretchable structure of an absorbent article has a first sheet layer made of a nonwoven fabric; a second sheet layer made of a nonwoven fabric and opposed to one side surface of the first sheet layer; and a plurality of elongated elastically stretchable members provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. The first sheet layer and the second sheet layer have sheet bonded portions bonded via a hot melt adhesive disposed in a striped pattern that is intermittent in the longitudinal direction of the elastically stretchable members and continuously elongated in the direction intersecting with the elastically stretchable members, and either one of the first sheet layer and the second sheet layer is made of a low-adhesion nonwoven fabric having lower peel strength with respect to the hot melt adhesive than the other sheet layer.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: November 16, 2021
    Assignee: DAIO PAPER CORPORATION
    Inventors: Yohei Ono, Yasuko Ishikawa
  • Patent number: 11083637
    Abstract: A first sheet layer made of a nonwoven fabric; a second sheet layer made of a nonwoven fabric opposed to one side of the first sheet layer; and a plurality of elongated elastically stretchable members provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer are provided. At least a part of each end of the elastically stretchable member is fixed to at least one of the first sheet layer and the second sheet layer only via a first hot melt adhesive. The first sheet layer and the second sheet layer are bonded via a second hot melt adhesive in a range in the stretchable direction corresponding to a space between the both ends of the elastically stretchable member. The holding power of the first hot melt adhesive is higher than the second hot meld adhesive.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: August 10, 2021
    Assignee: Daio Paper Corporation
    Inventor: Yasuko Ishikawa
  • Patent number: 11020281
    Abstract: The present invention is intended to prevent cutting of the resilient and elastic members by a welding process.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: June 1, 2021
    Assignee: DAIO PAPER CORPORATION
    Inventor: Yasuko Ishikawa
  • Patent number: 10893985
    Abstract: An object of the present invention is to provide an elastic structure that has straightly extended ridges with excellent appearance, air permeability, and fluffy feel.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: January 19, 2021
    Assignee: DAIO PAPER CORPORATION
    Inventors: Yasuko Ishikawa, Keisuke Ebiduka, Shunji Seno
  • Publication number: 20200397622
    Abstract: A stretchable structure of an absorbent article has a first sheet layer made of a nonwoven fabric; a second sheet layer made of a nonwoven fabric and opposed to one side surface of the first sheet layer; and a plurality of elongated elastically stretchable members provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. The first sheet layer and the second sheet layer have sheet bonded portions bonded via a hot melt adhesive disposed in a striped pattern that is intermittent in the longitudinal direction of the elastically stretchable members and continuously elongated in the direction intersecting with the elastically stretchable members, and either one of the first sheet layer and the second sheet layer is made of a low-adhesion nonwoven fabric having lower peel strength with respect to the hot melt adhesive than the other sheet layer.
    Type: Application
    Filed: February 23, 2017
    Publication date: December 24, 2020
    Applicant: DAIO PAPER CORPORATION
    Inventors: Yohei Ono, Yasuko Ishikawa
  • Publication number: 20200352792
    Abstract: A first sheet layer is made of a nonwoven fabric; a second sheet layer is made of a nonwoven fabric opposed to one side of the first sheet layer; and a plurality of elongated elastically stretchable members are provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. Both ends of the elastically stretchable members are fixed to at least one of the first sheet layer and the second sheet layer via a first hot melt adhesive. The first sheet layer and the second sheet layer are bonded via a second hot melt adhesive in a range in the stretchable direction corresponding to a space between the both ends of the elastically stretchable member. The holding power of the first hot melt adhesive is higher than the second hot meld adhesive.
    Type: Application
    Filed: January 25, 2017
    Publication date: November 12, 2020
    Applicant: Daio Paper Corporation
    Inventor: Yasuko Ishikawa
  • Publication number: 20200297552
    Abstract: A stretchable structure of an absorbent article has a first sheet layer of a nonwoven fabric; a second sheet layer of a nonwoven fabric and opposed to one side of the first sheet layer. A plurality of elongated elastically stretchable members are provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer. The first sheet layer and the second sheet layer have sheet bonded portions bonded via a hot melt adhesive disposed in a striped pattern that is intermittent in the longitudinal direction of the elastically stretchable members and continuously elongated in the direction intersecting with the elastically stretchable members. One of the first sheet layer and the second sheet layer is a spunbond nonwoven fabric, and the other sheet layer is an air-through nonwoven fabric whose surface on the spunbond nonwoven fabric side is a fluffy surface.
    Type: Application
    Filed: February 23, 2017
    Publication date: September 24, 2020
    Applicant: Daio Paper Corporation
    Inventors: Yohei ONO, Yasuko ISHIKAWA
  • Publication number: 20190021916
    Abstract: A first sheet layer made of a nonwoven fabric; a second sheet layer made of a nonwoven fabric opposed to one side of the first sheet layer; and a plurality of elongated elastically stretchable members provided along the stretchable direction at intervals from each other between the first sheet layer and the second sheet layer are provided. At least a part of each end of the elastically stretchable member is fixed to at least one of the first sheet layer and the second sheet layer only via a first hot melt adhesive. The first sheet layer and the second sheet layer are bonded via a second hot melt adhesive in a range in the stretchable direction corresponding to a space between the both ends of the elastically stretchable member. The holding power of the first hot melt adhesive is higher than the second hot meld adhesive.
    Type: Application
    Filed: January 25, 2017
    Publication date: January 24, 2019
    Applicant: Daio Paper Corporation
    Inventor: Yasuko Ishikawa
  • Patent number: 10092457
    Abstract: In an underpants-type disposable diaper including a waist edge portion in which pleats extend straight and which has excellent fit, the inner layer and the outer layer at the waist edge portion of an outer body are joined by an adhesive arranged intermittently or a welding process performed intermittently in the width direction and continuously in a direction crossing the width direction, thereby forming sheet joined sections, waist edge portion resilient and elastic members are sandwiched between the inner layer and the outer layer and fixed to at least one of the inner layer and the outer layer at positions intersecting with the sheet joined sections, and the diaper includes an area not being joined and not having resilient and elastic member at an end portion of the outer body on the waist opening side in the waist edge portion, the area not having sheet joined sections nor the waist edge portion resilient and elastic members, and a vertical range being wider than spacing between the waist edge portion res
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: October 9, 2018
    Assignee: DAIO PAPER CORPORATION
    Inventors: Yasuko Ishikawa, Shunji Seno
  • Publication number: 20170281417
    Abstract: The present invention is intended to prevent cutting of the resilient and elastic members by a welding process.
    Type: Application
    Filed: August 19, 2015
    Publication date: October 5, 2017
    Inventor: Yasuko ISHIKAWA
  • Publication number: 20170209314
    Abstract: In an underpants-type disposable diaper including a waist edge portion in which pleats extend straight and which has excellent fit, the inner layer and the outer layer at the waist edge portion of an outer body are joined by an adhesive arranged intermittently or a welding process performed intermittently in the width direction and continuously in a direction crossing the width direction, thereby forming sheet joined sections, waist edge portion resilient and elastic members are sandwiched between the inner layer and the outer layer and fixed to at least one of the inner layer and the outer layer at positions intersecting with the sheet joined sections, and the diaper includes an area not being joined and not having resilient and elastic member at an end portion of the outer body on the waist opening side in the waist edge portion, the area not having sheet joined sections nor the waist edge portion resilient and elastic members, and a vertical range being wider than spacing between the waist edge portion res
    Type: Application
    Filed: February 26, 2015
    Publication date: July 27, 2017
    Applicant: DAIO PAPER CORPORATION
    Inventors: Yasuko ISHIKAWA, Shunji SENO
  • Publication number: 20160067115
    Abstract: An object of the present invention is to provide an elastic structure that has straightly extended ridges with excellent appearance, air permeability, and fluffy feel.
    Type: Application
    Filed: March 20, 2014
    Publication date: March 10, 2016
    Inventors: Yasuko ISHIKAWA, Keisuke EBIDUKA, Shunji SENO