How to increase the bearing pressure and compressive strength of corrugated paper color boxes? 

At present, most packaging companies in my country use two processes to produce color boxes: (1) first print the colored surface paper, then cover the film or glazing, and then manually mount the glue or mechanically automatically laminate the corrugated molding; (2) The color pictures and texts are printed on the plastic film, then covered on the cardboard, and then pasted and formed. valentine’s chocolate box

No matter which process is used to produce color box color boxes, its bearing pressure and compressive strength are much lower than ordinary watermark cartons of the same material (produced by cardboard line), and it is difficult to guarantee the quality when customers are in urgent need or in rainy days. Deeply troubled producers, so how to solve it? box chocolate cake

Everyone knows that the cartons produced by the cardboard line are formed by applying glue, heating for instant bonding, and drying; while the laminated color box color box cardboard is not heated and dried, and the moisture in the glue penetrates into the paper. Coupled with the barrier of the varnish on the colored surface and the plastic film, the moisture in the box blank cannot be dissipated for a long time, and it will naturally soften and reduce its strength. Therefore, we look for a solution to the problem from the following factors:chocolate box for gift

⒈ paper collocation luxury chocolate boxes

Some enterprises have such a misunderstanding: the greater the weight of the paper inside, the more the bearing pressure and compressive strength of the carton will be increased, but this is not the case. In order to enhance the bearing pressure and compressive strength of the color box color box, the pressure bearing capacity of the core paper must be enhanced. As long as the surface paper does not show corrugated traces after being glued, low-weight paper should be used as much as possible; the core paper and tile paper are best used. Straw pulp or wood pulp paper with good strength and high ring compressive strength. Do not use medium-strength or general-strength corrugated paper, because it is mostly a mixture of raw pulp and recycled pulp, which has fast water absorption, low ring compressive strength, and good toughness but low stiffness. According to the test, the water absorption rate of medium-strength corrugated paper is 15%-30% higher than that of pulped paper measured by the Kebo method; the weight of the lining paper can be increased appropriately. Practice has proved that reducing the grammage of inner paper and increasing the grammage of corrugated paper and core paper has more competitive advantages in terms of quality and price. gift box of chocolates

⒉The quality of glue chocolates gift boxes

Most of the carton production now uses homemade or purchased cornstarch glue. High-quality corn glue not only has good bonding strength, but also can enhance the bearing pressure and stiffness of the cardboard, and the box body is not easy to deform. The quality of corn starch glue is closely related to the production process, environment, quality of raw and auxiliary materials, and mixing time. The quality requirements of cornstarch, fineness 98-100 mesh, ash content not exceeding 0.1%; water content 14.0%; acidity 20CC/100g; sulfur dioxide 0.004%; normal smell; white or slightly yellowish in color.small chocolate box

If the quality of gelatinized starch does not meet this standard, the water ratio can be appropriately reduced depending on the situation. As the temperature rises, the water ratio should be reduced accordingly, borax and caustic soda should be increased as appropriate, and the amount of hydrogen peroxide should be reduced. Cooked glue should not be stored for a long time, especially in summer, it is best to use it as you make it. Adding 3%-4% formaldehyde, 0.1% glycerin and 0.1% boric acid to the glue can increase the water resistance of the paper, speed up the bonding speed, and strengthen the cardboard. hardness.gift chocolate box

In addition, environmentally friendly chemical glue, that is, PVA adhesive, can also be used when laminating the paper board. Its characteristics are that the laminated corrugated cardboard is flat, straight, well bonded, and durable without deformation. The production method is (taking 100kg of adhesive as an example): material ratio: polyvinyl alcohol 13.7kg, polyvinyl acetate emulsion 2.74kg, oxalic acid 1.37kg, water 82kg, water ratio 1:6). First, heat the water to 90°C, add polyethylene glycol and stir evenly, continue to heat until the water boils, keep warm for 3 hours, then add oxalic acid and stir, finally add polyvinyl acetate emulsion and stir evenly.

⒊Glue amount

Regardless of whether it is manual or automatic mechanical mounting of colored surfaces, the amount of glue applied should not be too large. In actual production, some employees artificially increase the amount of glue applied in order to avoid degumming, which is not advisable and must be strictly controlled. The amount of glue applied should be 80-110g/m2. However, depending on the size of corrugated corrugated, it is advisable to grasp the amount of glue and evenly coat the corrugated peaks. As long as there is no degumming, the less the amount of glue, the better.

⒋The quality of single-sided cardboard chocolate box delivery

The quality of single-sided corrugated cardboard is determined by the quality of the base paper, the type of corrugation, the working temperature of the corrugating machine, the quality of the adhesive, the running speed of the machine, and the technical level of the operator.