Stretch film, also named heat shrink film, domestically compared with PVC as a substrate, DOA is a plasticizer and self-adhesive to produce PVC stretch film.

Due to environmental problems, high cost (relative to PE ratio, small unit packaging area), poor stretchability, etc., started in 1994-1995,The production of PE stretch film was gradually eliminated. PE stretch film is first made of EVA as a self-adhesive material, but its cost is high and tastes. After development, PIB,

VLDPE is a self-adhesive material, and the substrate is now dominated by LLDPE, including C4, C6, C8 and metallocene PE (MPE).