Patents by Inventor Werner Stefani

Werner Stefani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8895459
    Abstract: The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85° C. and 110° C., a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa·sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher thoughputs and requiring less energy.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: November 25, 2014
    Assignee: Trevira GmbH
    Inventors: Jorg Dahringer, Bernd Blech, Werner Stefani, Werner Grasser, Mehmet Demirors, Gert Claåsen
  • Patent number: 8389426
    Abstract: The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85° C. and 110° C., a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher thoughputs and requiring less energy.
    Type: Grant
    Filed: January 4, 2010
    Date of Patent: March 5, 2013
    Assignee: Trevira GmbH
    Inventors: Jörg Dahringer, Bernd Blech, Werner Stefani, Werner Grasser, Mehmet Demirors, Gert Claasen
  • Publication number: 20110195214
    Abstract: A superabsorbent bi-component fiber, wherein component A is at least one thermoplastic polymer and component B is a compound selected from at least one thermoplastic base polymer and at least one superabsorbent polymer (SAP), and also a method for production thereof are described. The melting point of the thermoplastic contained in component A is at least 20° C. higher than the melting point of the thermoplastic contained in component B, the average grain size of the SAP is 0.5 to 10 ?m and the compound has an SAP-fraction of 0.5 to 40 wt %. The bi-component fiber can be used to produce superabsorbent textile fabrics which are used in particular in the field of hygiene and medicine.
    Type: Application
    Filed: October 6, 2009
    Publication date: August 11, 2011
    Inventors: Kay Bernhard, Jörg Dahringer, Michael Klanert, Werner Stefani
  • Publication number: 20110165470
    Abstract: The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85° C. and 110° C., a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher thoughputs and requiring less energy.
    Type: Application
    Filed: January 4, 2010
    Publication date: July 7, 2011
    Inventors: Jörg Dahringer, Bernd Blech, Werner Stefani, Werner Grasser, Mehmet Demirors, Gert Claasen