How to solve the quality problem of the adhesive Cosmetic Boxes

How to solve the quality problem of the adhesive Cosmetic Boxes

In the process of gluing and packaging products, the following problems are always prone to occur: the amount of glue brushing is too thick, which leads to the overflow of glue after pressing, which not only affects the appearance of the product, but also easily causes the packaging boxes to stick to each other. If this happens, it should be left to dry for 2-5 minutes after brushing the glue, and then press the glue after the glue is dry. The glue brush is too thin and the air time is too long, which will lead to poor adhesion and sometimes no adhesion at all. When this happens, you should consult the manufacturer according to the instruction manual.

There is no pressing or the pressure is too small, which will cause the bonded product to automatically bounce. This situation is mainly for products with high stiffness, so it should be pressed for at least half an hour, because many adhesives are contact adhesives. , so the two surfaces to be adhered must be effectively pressed together. In unit time, if the initial adhesive force is less than the elasticity of the product, the product will bounce, so the general product requires a pressing time of 0.5 hours.

In order to save the cost of raw materials, some manufacturers use laminating glue and milky white glue to stick the box or use a large amount of water to dilute the adhesive, resulting in insufficient bonding fastness and poor adhesion on the film. This situation is very dangerous, and it also violates the bonding principle and process. It is hoped that the adhesive users will not cause greater losses to themselves by blindly using glue.

The Cosmetic Boxes will be degummed in the cold winter season. This is mainly due to the poor low temperature resistance of some adhesives. Below 5°C, the surface of the adhesive will lose its activity, resulting in a decrease or disappearance of the adhesive force. And in the hot summer, the sticky box will also pop open and degummed in the warehouse or transport car box. This is mainly because the high temperature resistance of this kind of adhesive is not good. At the temperature of 50-60 ℃, the adhesive layer becomes soft and the strength becomes smaller, which leads to the degumming of the Cosmetic Boxes.

The bonding effect of the Cosmetic Boxes is very good in the early stage of sticking (usually half a month), but as time goes on, the Cosmetic Boxes will be degummed. This is mainly due to the poor bonding durability of the adhesive itself, most of which are due to the addition of some plasticizers to the adhesive. With the extension of time, the plasticizer migrates to the paper base, which causes the adhesive layer to become hard and brittle, resulting in the product Degumming. On the other hand, because the adhesive contains a lot of unsaturated bonds, the aging resistance of the product is not good, the storage period is prolonged, the film becomes brittle, and the product is degummed.

If the warehouse is very humid, if it is stored in it for a long time, not only the humidity of the product will exceed the standard, but the product will also degumming. This is mainly because the product absorbs water, and the water resistance of the adhesive itself is not good, which leads to the softening of the adhesive layer and delamination.

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