Cosmetic Boxes printing process problems and solutions

Cosmetic Boxes printing process problems and solutions

At present, the types of glue used in the domestic use of joints (corrugated and paired) are relatively confusing, and there are roughly two types:

1. Oxidized starch and water glass glue, this kind of glue is cheap and has a certain viscosity, so it is still used in some low-grade packaging and low-cost manufacturers. However, because this kind of glue is very alkaline, sometimes the packaging will The phenomenon of yellowing, softening, moisture absorption and brittleness appears, which affects the printing quality of the ink. Various failures occur on the printing surface, so it belongs to the low-grade viscose that should be eliminated.

2. Polyvinyl acetate emulsion modified glue, this kind of glue is environmentally friendly viscose, with high bonding strength and fast drying. It is widely used at present, but the price is relatively high, and it is also divided into high, medium and low grades. Generally speaking, the higher the price, the greater the strength, and the smaller the water content. High-grade packaging Cosmetic Boxes generally use this kind of high-quality glue.

In the actual processing and production process, the common quality problems in the lamination process are generally as follows:

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1. The product appears warped. The main reason for this is that too many sheets are pasted, which causes the glue on the edge of the cardboard to dry and not stick. Therefore, it is usually more appropriate to squeeze after 20 sheets are posted.

2. The humidity of the product is too high, especially for the flat sticking of the gold card. The main reason is that gold cardboard has poor water penetration and dissipation ability, while ordinary flat adhesive has high water content. Therefore, it is usually solved with quick-drying glue or by unfolding the product and drying it in the sun.

3. If the mounted tile or flat-mounted product is placed in an environment with high air humidity, it will turn yellow and other phenomena if it is placed for a long time. Mainly because some manufacturers use water glass glue or starch glue with high alkalinity. Therefore, in order to ensure the quality of the product, we should choose flat stickers and corrugated adhesives with better quality.

4. The phenomenon of delamination of Cosmetic Boxes is mainly due to the insufficient strength of the adhesive. It is recommended to use products from regular manufacturers, which can not only ensure strength, reduce humidity, increase stiffness, but also improve the quality and grade of Cosmetic Boxes .