Patents Assigned to Lutravil Spinnvlies GmbH & Co.
  • Multiple-layered non-woven fabric
    Patent number: 4093763
    Abstract: Disclosed is a multiple-layered non-woven fabric particularly suited for use as backings for tufted carpets in view of its excellent strength and dimensional stability properties. The non-woven fabric is characterized by specifically defined strength parameters and by a graduaton of bonds throughout the thickness thereof, so that both surfaces differ from each other insofar as the degree of filament bonding is concerned.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: June 6, 1978
    Assignee: Lutravil Spinnvlies GmbH & Co.
    Inventors: Ludwig Hartmann, Paul F. Maahs, Luder Gerking, Ivo Ruzek, Eberhard Schafer
  • Spunbonded fabrics of nylon-6 filaments
    Patent number: 3991250
    Abstract: A spunbonded fabric of nylon 6, bonded by binders such as polyacrylates and polyurethanes, in which the filaments are substantially in the .gamma.-modification in the crystalline regions and the average molecular orientation, produced by attenuation, of the nylon 6 filaments is at most 80% of the theoretically possible orientation. It is an object of the invention to produce spunbonded fabrics of improved properties and to do so more economically, e.g. with higher outputs.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: November 9, 1976
    Assignee: Lutravil Spinnvlies GmbH & Co.
    Inventors: Ludwig Hartmann, Lueder Gerking, Gerhard Mueller
  • Dimensionally stable, high-tenacity non-woven webs and process
    Patent number: 3975224
    Abstract: Dimensionally stable, high-tenacity non-woven webs and process for their manufacture. The non-woven webs of the invention are distinguished by a relative grab-tensile strength of at least 200 p/g/m.sup.2, a breaking extension of not more than 50% and a shrinkage of not more than 1%, as measured at 160.degree.C, and are primarily useful as reinforceing and backing materials in the manufacture of needle-punched and tufted carpets.
    Type: Grant
    Filed: August 16, 1973
    Date of Patent: August 17, 1976
    Assignee: Lutravil Spinnvlies GmbH & Co.
    Inventors: Ivo Ruzek, Guenther Worf, Ludwig Hartmann, Paul Maahs, Lueder Gerking