Use of a polyolefin film as a medium to be written or...

B - Operations – Transporting – 41 – M

Patent

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Details

B41M 5/52 (2006.01) B29C 59/16 (2006.01) B29C 71/00 (2006.01) B41M 1/30 (2006.01) B41M 5/00 (2006.01) B41M 5/41 (2006.01) C08J 5/18 (2006.01) B29C 59/08 (2006.01) B29C 59/10 (2006.01)

Patent

CA 2426092

The invention relates to the use of a polyolefin film as a medium to be written or printed on, according to which oxygen-containing groups are attached to one or both faces of the film surface by surface treatment. The polyolefin film is then highly surface-polarized by subsequently electrostatically charging it. Film thickness and surface weight and the electrostatic adhesive force produced are controlled by the degree of surface polarization in such a manner that the film, at least when the treated face is placed on a clean, dry and planar floatglass surface, will adhere to said surface indefinitely.

L'invention concerne l'utilisation d'une feuille de polyoléfine comme support d'écriture ou d'impression. Selon l'invention, des groupes renfermant de l'oxygène sont déposés sur la surface de ladite feuille, sur un ou deux côtés, par traitement de surface. La surface de ladite feuille de polyoléfine est ensuite fortement polarisée par application de charges électrostatiques. L'épaisseur de la feuille et sa masse par unité de surface, ainsi que l'adhérence électrostatique produite sont adaptées les unes aux autres en fonction de la valeur de la polarisation superficielle de sorte que la feuille, au moins lors de l'application du côté traité sur une surface de verre flotté plane, sèche et propre reste plaquée sur cette surface dans chaque position, sans limitation dans le temps.

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