The meaning and function of sealing lining the sealing lining, commonly known as lid lining, refers to the lid and lining material which can produce a tight sealing effect with the container. Here, containers refer to glass bottles, plastic bottles and metal cans. There are various types of covers, including screw caps, drag covers, cap caps, crimping caps, pressure caps. Lining materials refer to the materials that can close the lid and container tightly, Materials with certain requirements and specifications are absolutely free of leakage. To ensure the performance of packaged goods remains unchanged, for example, if the cover is used only and there is no lining at the bottom of the cover, the sealing effect is difficult to achieve. The function of lining is huge