Biaxially-oriented polyolefin film with improved surface...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 55/14 (2006.01) B29C 55/06 (2006.01) B29C 55/16 (2006.01) B29C 59/08 (2006.01) B29C 59/10 (2006.01) B29C 59/14 (2006.01)

Patent

CA 2628482

The invention relates to a method for increasing the surface tension on biaxially stretched films made of thermoplastic polymers. According to said method, a film is first treated on a surface by means of an atmospheric pressure plasma before being stretched transversally or simultaneously across the width thereof, and the film is additionally subjected to a second treatment by means of a corona or flame after being stretched transversally or simultaneously, said second treatment being done on the same surface which has already been plasma-treated.

L'INVENTION CONCERNE UN PROCEDE D'AUGMENTATION DE LA TENSION DE SURFACE DE PELLICULES ETIREES BIAXIALEMENT, COMPOSEES DE POLYMERES THERMOPLASTIQUES. SELON LEDIT PROCEDE, UNE PELLICULE EST D'ABORD TRAITEE SUR UNE SURFACE PAR PLASMA SOUS PRESSION ATMOSPHERIQUE, AVANT ETIRAGE TRANSVERSAL OU ETIRAGE SIMULTANE SUR SA LARGEUR, PUIS SOUMISE A UN DEUXIEME TRAITEMENT PAR CORONA OU FLAMME, APRES ETIRAGE TRANSVERSAL OU ETIRAGE SIMULTANE, LE DEUXIEME TRAITEMENT ETANT REALISE SUR LA MEME SURFACE TRAITEE PAR PLASMA.

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