D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/00 (2006.01) B32B 38/04 (2006.01) B32B 38/10 (2006.01)
Patent
CA 2689605
The invention relates to a covering for a paper, cardboard, or tissue machine, comprising a plurality of films of polymer material which are laminated on one another, wherein the films, for the formation of drainage channels in the covering, each have a plurality of perforations which extend over the thickness of the films. The invention is characterized in that at least one of the perforated films is formed such that, to begin with, a film which is not perforated is produced from the polymer material and from filler admixed with the polymer material, and the perforations are formed in the film by the subsequent removal of the filler from the polymer material.
L'invention concenre un habillage de machine à papier, à carton, à tissu, comprenant une pluralité de films en matériaux polymères qui sont laminés les uns sur les autres, les films destinés à former des canaux de drainage dans le revêtement, présentant une pluralité de perforations qui s'étendent sur l'épaisseur des films. L'invention est caractérisée en ce qu'au moins un des films perforés est formé de manière à ce qu'un film non perforé soit formé à partir du matériau polymère et de la matière de charge ajoutée au matériau polymère, et que les perforations soient formées dans le film par élimination successive de la matière de charge du matériau polymère.
Bez Frank
Hack-Ueberall Petra
Hoehsl Matthias
Schmitt Matthias
Straub Michael
Sim & Mcburney
Voith Patent Gmbh
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