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When tearing the blister package, the damage interface on the blister oil layer (the surface is demoulding plastic film without ink) indicates that the paper surface coating is tightly closed and the blister oil layer is not easy to penetrate *** the paper layer.

After tearing off the blister packaging material, the damaged interface occurs in the ink layer (manifested in peeling off the plastic film with ink, but peeling off less paper wool), indicating that the strength of the paper coating is lower than that of the paper layer. It may be that the amount of coating latex is insufficient, the combination between primer and surface coating is poor, and the adhesive migration leads to uneven coating strength.

After tearing the blister package, the surface coating of the paper appears a fracture interface, indicating that the surface coating of the paper has low strength, strong sealing property, and the blister oil is not easy to penetrate *** the paper.

When tearing the blister package, the fracture occurs, and the interface is at the position of 1 / 2 and 1 / 3 of the paper thickness, indicating that the blister effect is good.

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Factors affecting blister effect:

Among them, there are four main packaging materials, including paper, blister oil, ink and plastic sheet; The other part is the welding production process of the packaging machine. Details are as follows.

For blister packaging, paper is the most key factor affecting the welding of blister packaging. If the ***ed paper itself cannot blister, it will not help to change the ordinary blister oil *** strong blister oil, or increase the thickness of the blister oil, the amount of blister oil for many times, or adjust other operating parameters (such as increasing the blister temperature and pressure). Therefore, to produce qualified paper blister packaging, we must first *** the appropriate paper. If you choose the right paper, you have succeeded 80%. There are many performance indexes of paper, and the influencing factors are also very complex. For special Blister products, it mainly involves the surface strength, absorption, interlayer bonding strength and water content of paper.

Different inks have different crosslinking degrees, resulting in different hardness and permeability after curing. The ink must have a certain adhesion to ensure that it can penetrate smoothly *** the paper surface. The ink formula cannot contain additives that reduce the adhesion, such as paraffin, grease, lubricating oil or release agent. After the ink is dried, in order to make the blister oil wet well on the ink surface and firmly adhere to the ink surface, the ink surface should be avoided from being too dense, which will affect the permeability of the blister oil in the coating process.

For blister oiliness, it is required to have good leveling, good permeability and adhesion to ink and paper, fast drying speed, smooth surface after oil, and certain luster and wear resistance. Blister oil must be used within the warranty period. If the quality of blister oil itself changes, the blister effect will be affected.

The specific process of blister heat sealing is: smear the paper card with blister oil, press it through the pressure device equipped with the machine, and heat the bubble shell and paper card by electric heating or high cycle wavelength, so that the softened bubble shell and melted blister oil stick together. After cooling, the bubble shell, blister oil and paper card are firmly connected to complete the blister packaging process. No matter what type of blister packaging machine, blister heat sealing packaging device is an important working mechanism of blister packaging machine, which directly affects the performance of blister packaging machine. According to the heating mechanism of blister heat sealing packaging, welding machines can be divided *** two types. One is a high-temperature welding machine, which uses resistance wire heating to realize the bonding between blister and paper card; The other is a high-frequency (or high-frequency) welding machine, which uses high-frequency wave to realize the bonding between blister and paper card, and uses high-frequency wave to realize the fierce collision of molecules inside the material to produce high temperature, and the welding temperature remains uniform.