We must still have a little understanding of the packaging box printing related knowledge. Now the printing staff will introduce you to the packaging box and the mounting process problems and solutions. details as follows:

Packaging products show delamination, which is mainly caused by the insufficient strength of the adhesive. It is recommended to choose products from regular manufacturers, which can ensure strength, reduce humidity, increase stiffness, and improve the quality and level of packaging products.

Nowadays, the types of glue used in China (corrugated and facing) are relatively disordered. In summary, there are roughly two types:

 1. Oxidized starch and water glass glue, this kind of glue is cheap and has certain viscosity, so it is still used in some low-grade packaging and low-cost manufacturers, but because this kind of glue has a strong alkalinity, it is sometimes packaged It will show the phenomenon of yellowing, softening, moisture absorption, and brittleness, and then affect the printing quality of the ink. Various failures occur on the printing surface from time to time, so it belongs to the low-viscosity grade that should be eliminated.

2. Polyvinyl acetate emulsion modified adhesive. This type of adhesive is environmentally friendly viscose, with high bonding strength and fast drying. It is now widely used, 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 lower the water content. This type of high-quality glue is generally used for high-end packaging products.

In the process of practical processing and production, the common quality problems in the mounting process generally include the following:

1. The product presents the phenomenon of warping angle. The primary reason for this situation is that the number of stickers is too much, and the glue on the edge of the cardboard has dried and cannot be stuck. Therefore, it is more appropriate to squeeze after posting 20 sheets.

2. The humidity of the product is too high, especially for flat stickers of gold cards. The main reason is that gold card paper has poor ability to penetrate and lose water, while ordinary flat glue has a high water content. So generally use quick-drying glue or unfold the product in the sun for processing.

3. If the mounted tile or flat-mounted product is placed in an environment with high air humidity, it will turn yellow if it is placed for a long time. The main reason is that 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 better quality flat and corrugated glue.

4. Packaging products show delamination, which is mainly caused by the insufficient strength of the adhesive. It is recommended to choose products from regular manufacturers, which can ensure strength, reduce humidity, increase stiffness, and improve the quality and quality of packaging products. level.