Flexible packaging According to conventional structure is usually used in the outer, middle, inner layer, adhesion layer, etc. to distinguish The outer material is usually chosen with good mechanical strength, heat resistance and good printing performance.
Materials with good optical properties.
Intermediate material He is usually used to strengthen a composite structure of a certain performance, such as barrier, shading, incense, strength and other materials
The most critical role of the inner layer material is the sealing property, the inner layer structure is directly in contact with the inside, so it is non-toxic, tasteless, water resistant and oil resistant.