Patents Assigned to Nippon Kynol Inc.
  • Melt-spun drawn or undrawn flame-resistant and antifusing cured epoxy-modified novolak filaments and process for production thereof
    Patent number: 4021410
    Abstract: A process for producing a flame-resistant and antifusing cured phenolic continuous filament, characterized by melt-spinning a molten resin of an uncured epoxy-modified novolak resin, and then curing the melt-spun filament obtained, and the filament produced by the aforesaid process.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: May 3, 1977
    Assignee: Nippon Kynol Inc.
    Inventors: Hiroaki Koyama, Isao Kimura
  • Process for spinning composite fiber of phenolic resin
    Patent number: 3996327
    Abstract: A method of producing a self-crimping composite fiber of phenolic resin having heat-resistant and flameproof properties which comprises compositely spinning a thermoplastic phenolic resin and a modified phenolic resin consisting of a thermoplastic resin and another thermoplastic resin, such that the two components are united in either an eccentric or side-by-side arrangement, and thereafter curing the resulting thermoplastic composite fiber.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: December 7, 1976
    Assignee: Nippon Kynol Inc.
    Inventors: Koichiro Ohtomo, Thuyoshi Nakamori
  • Process for preparing phenolic filaments
    Patent number: 3972959
    Abstract: A process for producing melt-spun and cured phenolic filaments having improved tenacity and whiteness which comprises treating cured phenolic filaments with an alcohol having 1 to 6 carbon atoms or acetone and reacting the thus-treated phenolic filaments with an esterifying solution containing acetic anhydride in the presence of an inorganic acid of phosphorus as an esterifying catalyst.
    Type: Grant
    Filed: October 22, 1974
    Date of Patent: August 3, 1976
    Assignee: Nippon Kynol Inc.
    Inventor: Hiroaki Koyama