Two Or More Layers Patents (Class 428/297.1)
  • Patent number: 6261692
    Abstract: The present invention relates to a method for preparing a carbon-carbon composite. The method of the present invention comprises adding a ceramic-based oxidation inhibitor having a brittle-to-ductile transition, to thereby eliminate high densification processes via re-impregnation and re-carbonization. The present invention also relates to a carbon-carbon composite prepared thereby that comprises a ceramic powder added to a thermosetting resin.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: July 17, 2001
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Soo-Jin Park, Jae-Rock Lee, Min-Seok Cho
  • Patent number: 6228473
    Abstract: Disclosed is a plate-like carbon fiber-reinforced composite material comprising carbon fibers, wherein that the carbon fibers have a strain at compressive break of 1.7 to 5%, a tensile elastic modulus of 5 to 160 GPa, and a density of 1.5 to 1.9 g/cm3 and further in that the composite comprising said carbon fibers cause no delamination by an impact energy of less than 1.4 J/mm in the test of compression after impact in accordance with JIS K 7089.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: May 8, 2001
    Assignees: Nippon Mitsubishi Oil Corporation, Nippon Steel Corporation, Nippon Graphite Fiber Corporation
    Inventors: Shinichi Takemura, Yoshio Soda, Hideyuki Ohno, Yutaka Arai, Tomohiro Nakanishi
  • Patent number: 6177202
    Abstract: A power transmission belt having a body with a length and defined by a cushion rubber layer having at least one load carrying cord embedded therein and extending lengthwise with respect to the body, and a compression section made at least partially from rubber. The cushion rubber layer has a rubber composition including an ethylene-&agr;-olefin elastomer capable of being cross-linked with sulfur. The rubber in the compression section is a rubber composition made from an ethylene-&agr;-olefin elastomer capable of being cross-linked with an organic peroxide.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: January 23, 2001
    Assignee: Mitsuboshi Belting Ltd.
    Inventors: Tsuyoshi Takehara, Toshimichi Takada