Compared with corona pretreatment, the reason why the coating pretreatment of heat transfer film www.print-labels.net can keep the treatment effect stable for a long time is that corona pretreatment can only produce a very thin functional layer, while... moreCompared with corona pretreatment, the reason why the coating pretreatment of heat transfer film www.print-labels.net can keep the treatment effect stable for a long time is that corona pretreatment can only produce a very thin functional layer, while the coating thickness produced by coating pretreatment is 0.5 microns to several microns, so many factors that lead to the decrease of surface energy after corona pretreatment do not exist.
On the one hand, the coating is like a barrier layer, which can block the migration of additives to the film surface; On the other hand, the layer remains active for a long time on the film surface.
The question now is, is pretreatment of coating really necessary? Because most printing machines can be equipped with corona treatment devices nowadays, it is theoretically possible to print thin film materials without pretreatment coating.
Printing plants often encounter a phenomenon: if some substances and impurities affecting ink adhesion are deposited on the surface of... less
