Plastic film is typically produced using blown film and film stretching processes. The corona process is often used to pretreat these films for printing and finishing processes, but this poses its own problems. The corona process achieves only limited surface tension that declines significantly after just a few weeks in storage. And as an outcome of the process, even minor contamination on pretreatment rollers can result in punctures on the reverse side of the material.
Kunststoffe international (12/2017)
DICHT! (Nr.4/ 2017)