What performances should be focused on when entering the factory for convenient preparation of food packaging materials?

What performances should be focused on when entering the factory for convenient preparation of food packaging materials? (1) Barrier to oxygen and water vapor in the environment - through the oxygen permeability, water vapor permeability test to verify, to prevent the packaging material due to the large amount of transmission, poor barrier, resulting in convenient preparation of food mold, agglomeration and other phenomena
.

Kneading resistance - for composite films containing aluminum materials (such as materials containing aluminized film, aluminum foil, etc.
), the oxygen permeability or water vapor permeability test before and after rubbing is compared and verified, if the rubbing resistance is poor, it is easy to appear creases, pinholes and other phenomena, resulting in reduced barrier resistance and poor
sealing of the packaging material.

(2) Uniformity of thickness of physical and mechanical properties - Verified by testing the thickness of the packaging, the uniformity of the thickness is the basis for ensuring the good performance of
the packaging material.

Smoothness - verified by friction coefficient test to prevent the packaging material from being difficult to unwind or slip due to the friction coefficient being too large or too small
.

(3) Sanitary performance organic solvent residue - verified by solvent residue test, if the solvent residue is too much, the packaging film has a peculiar smell, and the residual solvent is easy to migrate to the packaged convenient brewing food, resulting in convenient brewing food odor, affecting the health
of consumers.