B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 59/02 (2006.01) B29C 39/14 (2006.01)
Patent
CA 2324313
The invention relates to a method for producing a surface-structured, film- like semi-finished product (31) from a thermoplastic. According to said method a thermoplastic material is applied in a molten state or in the form of a film onto a surface (5) having fine cavities corresponding to the inverse structure (matrix) of the desired final structure. After solidification the plastic material is withdrawn from the surface so that the thermoplastic material which was introduced into the cavities and withdrawn therefrom forms a pile (12) consisting of protuberances. The protuberances constituting the pile (12) are elongated by combing, brushing, knife-coating and/or shear pinching (22- 27), which significantly increases the length of the protuberances.
L'invention concerne un procédé qui permet de fabriquer un produit semi-fini (31) de type feuille, à surface structurée, à partir d'un thermoplastique. On applique un matériau thermoplastique à l'état fondu ou sous forme de feuille sur une surface (5) présentant de fines cavités et constituant une structure négative (matrice) par rapport à la structure souhaitée. Après durcissement, on retire le matériau plastique de la surface, de façon que le matériau thermoplastique qui avait pénétré dans les cavités et qui en est retiré forme un voile (12) constitué de protubérances. On étire les protubérances constituant le voile (12) par peignage, brossage, raclage et/ou pincement par cisailles (22-27), de façon à accroître sensiblement leur longueur.
Advanced Design Concepts Gmbh
Hcd Hygienic Composites Development Gmbh
Stikeman Elliott Llp
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