Patents Assigned to Japan Absorbent Technology
  • Patent number: 5814569
    Abstract: A nonwoven fabric of superior uniaxial elasticity is provided. The nonwoven fabric comprises of conjugate filaments each of which is about concentric sheath-core type. Core component is composed of polyester and sheath component is composed of polyolefine. In the nonwoven fabric, heat bonded areas are interspersed by heat bonding the conjugate filaments one another by softening or melting the sheath component. The nonwoven fabric satisfies following four properties concurrently: (i) breaking elongation in cross direction is 150% or more, (ii) ratio of breaking elongation in cross direction to breaking elongation in machine direction is 5 or more, (iii) percentage of elastic recovery at the time of extending the nonwoven fabric by 50% in cross direction is 60% or more, and (iv) percentage of elastic recovery at the time of extending the nonwoven fabric by 100% in cross direction is 50% or more. A heat is partially applied to a filamentous web, thereby obtaining a filamentous fleece.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: September 29, 1998
    Assignees: Unitika Ltd., Japan Absorbent Technology Institute
    Inventors: Migaku Suzuki, Hiroaki Fukui, Yoshihiko Mineda, Koichi Nagaoka, Michiyo Iimi
  • Patent number: 5693038
    Abstract: According to the present invention, there is provided a sanitary article comprising a main body having a liquid-impermeable back sheet, a liquid-permeable front sheet and an absorbent material and leg holes having at the opposed edge portions of the main body, further comprising fixation means forming a flexible ring which are fitted closely over the entire circumference of the proximal portion of each of the wearer's legs. The article to which the present invention is directed includes both the diaper and the sanitary napkin and, hence, as the main body, either of one taking the form of underpants when worn, which has a size enough to cover the wearer's entire waist portion, and of a relatively small one which covers only the wearer's crotch portion is used.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: December 2, 1997
    Assignee: Japan Absorbent Technology Institute
    Inventors: Migaku Suzuki, Hiroaki Fukui
  • Patent number: 5690626
    Abstract: According to the present invention, there is provided a sanitary article comprising a main body having a liquid-impermeable back sheet, a liquid-permeable front sheet and an absorbent material and leg holes having at the opposed edge portions of the main body, further comprising fixation means forming a flexible ring which are fitted closely over the entire circumference of the proximal portion of each of the wearer's legs. The article to which the present invention is directed includes both the diaper and the sanitary napkin and, hence, as the main body, either of one taking the form of underpants when worn, which has a size enough to cover the wearer's entire waist portion, and of a relatively small one which covers only the wearer's crotch portion is used.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: November 25, 1997
    Assignee: Japan Absorbent Technology Institute
    Inventors: Migaku Suzuki, Hiroaki Fukui