Performance of biaxially oriented polyester film

Due to the polar groups in the molecular structure, the surface tension of the BOPET film can reach B2mN/m after a little corona treatment, which is very beneficial for printing and lamination. When BOPET film is combined with other heat-sealable materials (such as CPP film) to make bags, the temperature of the white heat sealing knife is as high as 220~C, and the BOPET film will not melt or deform, and will not stick to the knife, which is beneficial The composite film bag making process is proceeding smoothly. Sometimes, composite packaging bags with BOPA//BOPET//CPP structure are also produced. At this time, both sides of BOPET film must be bonded and laminated with adhesive. Therefore, BOPET film with corona treatment on both sides should be used. Just work. And the surface tension of both sides must reach 50mN/m or more to ensure that the two sides are firmly bonded.