Patents Assigned to Sumitom Electric Industries, Ltd.
  • Porous structure of polytetrafluoroethylene and process for production thereof
    Patent number: 4713070
    Abstract: A porous polytetrafluoroethylene material is disclosed having a molecular microfibrous structure having, at one surface, a strong orientation in a given direction and, at another opposite surface, a strong orientation and a direction at right angles to the first, in which the orientation of the microfibrous structure progressively changes from one surface to the other. A process for preparing such an element is also disclosed.
    Type: Grant
    Filed: January 24, 1986
    Date of Patent: December 15, 1987
    Assignee: Sumitom Electric Industries, Ltd.
    Inventor: Hiroshi Mano