1. Specification and dimensional deviation requirements, including various dimensional deviation indexes of bag and membrane.
2. Requirements for appearance quality, including requirements for wrinkles, scratches, scalds, perforations, adhesion, foreign bodies, layering, empty sealing, bubbles, flatness, sudden reinforcement and film roll tightness.
3. Physical and mechanical performance requirements, including tensile force, elongation at break, tearing force, stripping force, heat and strength, pendulum impact resistance, water vapor transmission, oxygen transmission, heat resistance, medium resistance, pressure resistance and drop performance.