The $64 question is: what causes ink adhesion problems when screen printing polycarbonate film? While some have suggested moisture absorption as the culprit, the most likely candidate is exposure to UV light and oxygen. As the polycarbonate absorbs UV light, it excites the photons of the atoms, which in turn creates free radicals. Free radicals are atoms with a few extra electrons. These extra electrons make free radicals highly reactive, or what I like to think of as being chemically promiscuous. These free radicals chemically react with any impurities in the polycarbonate film, such as sodium. The result of this reaction is degradation of the polycarbonate. This is why the film can yellow and become brittle. Read more

Would you like paper or plastic? In the sign, screen and digital markets, vinyl film manufacturers generally pick paper release liners. Plastic film liners are more frequently used for label stock. Paper liners afford many advantages compared to film liners. They are very heat stable…more stable at high temperatures because plastic can deform. Paper also provides consistent performance. Most importantly, paper liners are more cost effective than film liners. Read more