USE OF A POLYOLEFIN FILM AS A FLIP CHART

摘要

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.