Leather Patents (Class 162/144)
  • Latex containing papers
    Patent number: 4510019
    Abstract: Polymer, co-polymer and/or elastomer containing paper is manufactured for a wide variety of end uses. The paper is remarkably homogeneous and retains its porosity even when it contains large quantities of polymer, co-polymer or elastomer. The latex and the fibrous slurry are mixed at the wet end in conjunction with a polyelectrolyte bridging agent, the bridging agent having a cationic charge and the latex and fibrous material having an anionic charge. In this way, the latex particles in their substantially original size become linked with the fibrous material by means of the intermediate bridging agent and without the latex undergoing any substantially coagulation or precipitation.
    Type: Grant
    Filed: November 17, 1982
    Date of Patent: April 9, 1985
    Assignee: Papeteries de Jeand'heurs
    Inventor: Rene Bartelloni
  • Fibrous materials useful as leather substitutes and consisting essentially of leather fibers, fibrils or fibrides of synthetic polymers and cellulose fibers
    Patent number: 4162996
    Abstract: There are disclosed fibrous materials useful as leather substitutes and consisting essentially of the combination of leather fibers, cellulose fibers and fibrils or fibrides of synthetic polymers having a surface area larger than 1 m.sup.2 /g.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: July 31, 1979
    Assignee: Montedison S.p.A.
    Inventors: Paolo Parrini, Giuseppe Peroni, Guglielmo Corrieri, Gian P. Righi
  • Method of preparing the backer for the manufacture of man-made leather
    Patent number: 3947316
    Abstract: A method of preparing a backer for use in the production of man-made leather containing from 20 to 50% by weight of tanned collagen fibrous material.
    Type: Grant
    Filed: December 21, 1971
    Date of Patent: March 30, 1976
    Assignee: Statni vyzkumny ustav kozedelny
    Inventors: Milan Kremr, Vaclav Hrabovsky