Patents Assigned to Raduner & Co., AG
  • High temperature process for modifying thermoplastic filamentous material
    Patent number: 3957936
    Abstract: Filaments having a substantially increased inner surface, in particular porous filaments of filaments having a cracked, notched or nicked surface of thermoplsatic material are produced by subjecting filaments of thermoplastic material, preferably containing a pore-forming agent, to a heating medium at a temperature at least 100.degree., preferably 150.degree.C.
    Type: Grant
    Filed: July 22, 1971
    Date of Patent: May 18, 1976
    Assignee: Raduner & Co., AG
    Inventor: Alfred E. Lauchenauer