Paper aluminum-plastic composite film in the actual application of medical packaging powder, granule packaging products compared to the plastic aluminum-plastic packaging commonly used in the market now has the following advantages:

(1)The mechanical strength of the paper is high, the rigidity is good, and the ability to maintain the bag after forming is strong, which improves the cleanliness of the product appearance;

(2)Automatic packaging does not need to be easy to tear, with good easy to tear effect;

(3)Due to the high mechanical strength of the paper, when filling and sealing on the automatic packaging machine, it has a good resistance to the shear external force damage when sealing, and protects the aluminum foil from thermal sealing compression and compression break, which further ensures that the barrier performance of the middle layer aluminum foil is guaranteed.

In front of the market, the main application of paper aluminum-plastic structure of drug packaging with composite film paper, aluminum, plastic, its main technical indicators are:

1.Appearance

There shall be no perforation, foreign body, odor, adhesion, separation between composite layers and obvious damage, bubbles, wrinkles, dirt and other defects. The heat sealing part of the composite bag should be smooth and without virtual sealing.

2.Water vapor transmission

The test temperature was 38℃±0.6℃, the relative humidity was 90%±2%, and the water vapor transmission was less than 1.5g/ (m²·24h).

3.Oxygen transmission

The heat surface is towards the oxygen low pressure side, and the test temperature is 23℃±2℃, and the oxygen permeability is ≤3.0cm³/ (m²·24h·0.1MPa).

4.Peeling strength of inner layer and sub-inner layer: ≥ 2.5N / 15mm

5.Heat sealing strength: ≥ 12N / 15mm

6.Residual solvent

The total amount of residual solvent shall not exceed 5.0mg/m², of which the residual benzene solvent shall not be detected, and the detection limit of a single benzene solvent is 0.01mg/m².

First, roughness test of printing surface

On the packaging of finished products, will be printed with a clear pattern and logo. However, we will also find that the printing on some materials (especially paper or paper film) packaging is fuzzy, some is related to the quality of the ink, the color process, but a large part is related to the roughness of the printing surface. Since the general printing ink layer is only tens of microns thick, if the printing surface roughness is too large, then the printed ink layer will be embedded into the deep layer of the material, so that the ink layer thickness on the surface is not uniform, which will produce the phenomenon of paste and white. We should be printed surface roughness test, by simulating the conditions of the printing press to measure the surface roughness, from the microscopic point of view to examine the smoothness of the material on the printability, according to the results of the roughness, according to 2 to 2.5 times to adjust the thickness of the ink layer.

Second, ink friction test

Sometimes when we are in contact with food packaging, we will encounter the situation of ink staining hands, or find the phenomenon of ink falling off, which will have a great impact on consumers' desire to buy. In order to understand the adhesion performance of the printing ink on the substrate, we have to test the friction resistance of the ink, and use the standard ballast to make the two materials rub against each other at a set speed to check the firm performance of the printing ink. According to the different conditions of actual use, it can be divided into dry friction, wet friction, wet transfer, wet smearing and thermal friction.