Metallic screen material having a strand or fibre structure,...

C - Chemistry – Metallurgy – 25 – D

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C25D 1/08 (2006.01) B41C 1/14 (2006.01)

Patent

CA 2179527

A screen material is described which is formed by cladding, by means of electroplating, a structure composed of strands (4) or fibres, the structure mayconsist of a knit, woven or nonwoven material or alternatively of strands (4) or fibres welded together, wound strands (4) or fibres, and which structure may have been subjected to a calendering operation, which material, after having been provided, if required, with an electrically conductive cladding, is provided with a metal layer in an electroplating operation under such conditions, that an overgrowth ratio R greater than 1 is achieved. The invention also relates to a method for manufacturing such a material, which, in particular, involves making use of an electroplating bath for depositing a metal cladding on a starting material in which a chemical compound is present which increases the overgrowth ratio R. The methodcan be implemented using a variety of conditions by means of which it is possible to set the overgrowth ratio R to a desired value.

Matériau à mailles formé par gainage électrolytique d'une structure composée de fils (4) ou de fibres. La structure peut être constituée d'un matériau tricoté, tissé ou non tissé, ou de fils (4) ou de fibres soudé(e)s les un(e)s aux autres, et a éventuellement été soumise à une opération de calandrage. On peut, le cas échéant, former une gaine électroconductrice sur le matériau, après quoi celui-ci est doté d'une couche métallique par revêtement électrolytique dans des conditions telles que l'on obtient un rapport d'épaississement (R) supérieur à 1. On a également prévu un procédé de fabrication de ce matériau, consistant notamment à utiliser un bain de revêtement électrolytique pour déposer une gaine métallique sur un matériau de départ dans lequel est présent un composé chimique susceptible d'augmenter le rapport d'épaississement (R). La mise en oeuvre du procédé peut s'effectuer dans diverses conditions permettant de réguler le rapport d'épaississement selon une valeur requise.

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