This is a film containing 90% to 99% of polyesters with ethylene diaryldicarboxylate as the main structural repeat unit and 10% to 1% of polyolefin. Its thickness is 5-50μm, and the static friction coefficient is not greater than 0. . 3. For example: a paper container made of an unstretched film (thickness 30 mm, static friction factor 0.18) made of 97% PET copolymerized with DEG and 3% polyethylene, laminated to a film as its inner surface, and then After it was placed in a microwave oven and heated with olive oil for 60 min, there was no noticeable change.
Source: Polyester Industry