Below, the manufacturer of the blister packaging machine will talk to you about the factors that affect the blister effect.

Firstly, the manufacturer of the blister packaging machine needs to evaluate the foaming effect:

When the blister packaging is torn open, a damaged interface (with a peeled plastic film without ink on the surface) appears in the blister oil layer, indicating that the coating on the paper surface is tightly sealed and the blister oil is difficult to penetrate into the paper layer.

When the blister packaging is torn open, there is a damaged interface in the ink layer (indicating that the peeled plastic film has ink, but the peeled paper fur is less), indicating that the strength of the paper coating is lower than that of the paper layer. This may be due to insufficient latex coating, poor adhesion between the primer and topcoat, and adhesive migration, resulting in uneven coating strength.

When the blister packaging is torn open, a failure interface appears on the surface of the paper coating, indicating that the strength of the paper surface coating is low, the coating is tightly sealed, and the blister oil is difficult to penetrate into the paper layer.

When the blister packaging is torn open, there are damaged interfaces at 1/2 and 1/3 of the paper thickness, indicating that the blister effect is good.

Next, what the vacuum packaging machine manufacturer wants to talk about is the influencing factors of the foaming effect:

One part is four types of packaging materials, including paper, plastic oil, ink, and plastic sheets; The second part is the welding production process of the packaging machine. The specific manifestations are as follows.

For vacuum packaging, paper is the most critical factor affecting welding. If the selected paper itself cannot be sucked, changing ordinary oil to thick oil, increasing the thickness of the oil, applying oil twice, and adjusting other operating parameters (such as increasing temperature and pressure during oil suction) will not help. Therefore, to produce qualified paper blister packaging, the first step is to choose the appropriate paper. If the selection of the paper is correct, 80% will be successful. There are many performance indicators of paper, and the influencing factors are extremely complex. For vacuum plastic specialized products, this article mainly focuses on surface strength, absorption performance, interlayer bonding strength, and moisture content.

2. Different inks have different crosslinking degrees, resulting in different hardness and permeability after curing. Ink should ensure a certain degree of adhesion to ensure smooth penetration on the surface of the paper. The ink formula should not contain any viscosity reducing additives such as paraffin, grease, lubricating oil, or release agents. After the ink dries, in order to ensure that the vacuum oil is well wetted on the ink surface and firmly adheres to the ink surface, the degree of adhesion on the ink surface should not be too dense, which will affect the penetration of the vacuum oil during the coating process.

3. For the performance of blister oil, it is required to have good leveling performance, good penetration and adhesion to ink and paper, fast drying speed, smooth surface of printed parts after oiling, and a certain degree of glossiness and wear resistance. The foaming oil must be used within its shelf life. If the quality of the bubble oil changes, the bubble effect will be affected.