Expert analysis custom lift-up flaps book related knowledge

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  Posted by earthiteom earthiteom Jun 2 - Filed in Entertainment - #custom lift-up flaps book  - 137 views
  

  Everyone on the custom lift-up flaps book related knowledge must still not know much about the place, now experts to introduce you to the packaging box face mounting process problems and solutions. The details are as follows:

  Packaging products appear delamination phenomenon, mainly because the strength of the adhesive is not enough, it is recommended to choose some regular manufacturers of products, so as to ensure strength, reduce humidity, increase stiffness, but also to improve the quality and grade of packaging products.

  Now the domestic use of the surface (corrugated and mounted), the use of rubber analogy is more confused, there are probably two categories:

  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 manufacturers requiring low cost, but because this kind of glue has a strong alkaline, sometimes the packaging will appear yellow, soft, moisture absorption, brittle phenomenon, which affects the printing quality of ink, all kinds of failures occur on the printing surface. So it belongs to the low-grade viscose that should be eliminated.

  2. Polyvinyl acetate emulsion modified adhesive, this kind of adhesive is environmentally friendly adhesive, bonding strength is large, drying fast, is widely used, but the price is relatively high, which is also divided into high and low grades. In general, the higher the price, the greater the strength, the smaller the water content, high-end packaging products generally use such high-quality glue.

  In the actual processing and production process, the common quality problems in the laminating process are generally the following:

  1. The product is warped. The main reason for this situation is that there are too many sheets attached, and the glue on the edge of the cardboard has dried and cannot be stuck. Therefore, it is usually more appropriate to press on twenty sheets.

  2. The humidity of the product is too large, especially for the flat paste of the gold card. This is mainly due to the poor permeability and dispersion of gold card paper to water, and the water content of ordinary flat adhesive itself is higher. So it is usually solved by quick-drying glue or by unrolling the product and drying it in the sun.

  3. The mounted tile or flat paste products will turn yellow if placed for a little longer in an environment with high air humidity. Mainly because some manufacturers use water glass glue or starch glue with high alkaline content. Therefore, in order to ensure the quality of the product, we should choose better quality flat paste and corrugated glue.

  4, packaging products appear delamination phenomenon, mainly because the strength of the adhesive is not enough, it is recommended to choose some regular manufacturers of products, so as to ensure strength, reduce humidity, increase stiffness, but also improve the quality and grade of packaging products.

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