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1. Barrier 

Barrier to water vapor and oxygen: 

Respectively through the water vapor transmission capacity, oxygen transmission capacity test to verify, to prevent packaging material due to large transmission capacity, poor barrier, resulting in moisture, oxidation and deterioration of drugs.

Kneading resistance: 

For aluminum composite film, such as aluminum metallized film, conducting the comparison verificationby by rubbing before and after oxygen penetration test , if the kneading resistance is poor, easy to appear crease, pinhole and other phenomena, resulting in the reduction of packaging material barrier. 

1. Physical and mechanical properties 

Uniformity of Thickness : 

The uniformity of packing material thickness is verified by testing the thickness of packing material. 

Smoothness: 

Verify through the friction coefficient test, if the friction coefficient of the film is not suitable, large or small, it will casue the opening of bag not proper easily, may happen slippage or unsmooth of duringunwinding for bag making. 

Heat sealing effect: 

The verification through the heat sealing strength test is mainly aimed at the detection of the packaging of pharmaceutical products, to prevent the leakage of the heat seal part or break at the root of the heat seal from un-proper heat sealing or over-heated.

Sealing effect: 

Verified by testing the sealing performance of the packaging bag, which is mainly aimed at the detection items of the finished product packaging of drugs to find the parts where may have air leakage, to prevent the drugs from getting damp or oxidation. 

Pressure resistance: 

Verify by testing the compressive performance test of the packaging bag, to prevent bag breaking or air leakage from the packaging bag in stacking or other external extrusion. 

Drop resistance: 

This is verified by testing the drop resistance of the bags to prevent the finished packaging of pharmaceutical products from breaking when dropped.

3.Hygiene performance 

Solvent residues: 

The solvent residue test verifies that if there is a high level of residual organic solvents in the package, they are likely to gradually migrate into the medicine during contact with it and contaminate it.