Fashioned like this rich, in the absence of impaired function of the premise of a lot of advantages; retort, moisture, corrosion, vacuum effect is good, low oxygen permeability and high sealing performance, good sealing performance. Resistant to strong irritant to prevent the outside, and so the effective protection of products avoid strokes and damage to the external environment, extend shelf life. Quality assurance. With the rest assured. Small quantities can be customized according to customer requirements.