A sheet material for forming applications, metal container...

B - Operations – Transporting – 32 – B

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B32B 15/08 (2006.01) B32B 27/36 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2520311

A sheet material to be made into an object by an industrial forming process, the material comprising a metal substrate (2) and a polymer coating system (1) bonded thereto, the coating system comprising - an inner layer (3) comprising PET, modified PET and/or combinations thereof, as a layer for bonding the system to the substrate; - a layer comprising PET, PBT and/or combinations thereof, as a barrier layer (4); - an outer layer (5) comprising PET; wherein the outer layer (5) has non-tacking properties so as to avoid sticking of the material to the forming tools at normal operation temperatures in the industrial forming process.

L'invention concerne un matériau en feuille destiné à être transformé en objet au cours d'un processus de formage industriel. Ce matériau comprend un substrat métallique et un système de revêtement polymère lié à ce substrat. Le système de revêtement comprend une couche intérieure comprenant du PET, du PET modifié et/ou des combinaisons de ceux-ci, cette couche intérieure servant de couche de fixation du système sur le substrat, une couche comprenant du PET, du PBT et/ou des combinaison de ceux-ci, servant de couche isolante, une couche externe comprenant du PET, et présentant des propriété anti-adhésives afin d'éviter que le matériau ne colle sur les outils de formage aux températures de travail normales pendant le processus de formage industriel.

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