The material is generally PET/AL/CPE or PET/NY/AL/CPE. Among them, PET - good printing effect, NY - low oxygen permeability, AL - strong barrier and non transparent, CPE - packaging inner layer. Adhesive: Water soluble adhesive (more hygienic, environmentally friendly, and free of solvent residue) This product has good anti-static, oxygen barrier, shielding, moisture-proof, light blocking functions, and excellent heat sealing.