The difficulty of the color box opening control is that during the gluing operation, the function of the glue is difficult to grasp before it is completely cured, and it needs to be stabilized by controlling the parameters of the glue. In addition, several parameters such as viscosity, solid content, pH value, and shelf life may be mastered in the inspection of incoming materials of glue. The glue is easily transformed, and the temperature of the storage environment is usually 8-35 °C.

It is necessary to use chemical materials such as glue for the color box in the box-gluing process, which leads to an increase in the variable elements of the process and a corresponding increase in potential quality risks. Color box opening is a common question about the quality of pasting boxes, and it is also a key control item in the pasting process.

Correct selection of glue

It is also necessary to consider the working environment of the gluer workshop when choosing glue for the gluer. In order to achieve the color box gluing without opening the glue, it is very important to choose the correct gluing glue. Once the gluing glue is used incorrectly, it will cause the whole batch of color boxes to open.

The basic principle of choosing glue box is: choose different glues according to the different methods of disposing the surface of the color box surface paper. If the sticky position of the color box is that the normal paper surface is bonded to the normal paper surface, the permeable inner glue can be used when gluing the box; Paper plastic water, and different paper plastic water should be selected according to the different film surface materials. For example, PET or OPP film surface should use different paper plastic water when gluing;

If the paper surface is bonded to the UV varnish surface, UV glue needs to be used when gluing the box; if the paper surface is bonded to the polished surface, the polishing glue needs to be used when gluing the box. Manual gluing or slow gluing speed equipment should use glue with a long open time (from the time when the glue and the adhesive contact to the time when the adhesive can no longer move freely); automatic gluing or gluing speed is fast, should choose open Short time glue.

The ratio of glue used in winter and glue used in summer should be different, because the glue of the same brand and batch has different viscosity under different ambient temperatures, and the lower the ambient temperature , the higher the glue consistency. Whether it is winter or summer, the glue is required to reach the viscosity that is most convenient for production operations during the process of gluing. Due to the low temperature in winter and the high quality control of glue consistency, if the color box manufacturer adds water to adjust the viscosity of the glue, the adhesion of the glue will be affected to a certain extent.

Therefore, the glue used at a lower ambient temperature must adhere to the adhesive force of the glue and the normal response mechanism of the glue, and it is necessary to adjust the detection system and instruments accordingly to the formula of the glue. A very sophisticated glue, which cannot be used directly in the north. In addition, we must also consider the application environment of the color box. If the corrugated color box after gluing needs to be sent to a high-temperature environment for use, it is necessary to use high-temperature-resistant gluing glue;

If the pasted color box needs to be sent to a low temperature environment, it is necessary to use low temperature-resistant pasting glue. If the automatic folder gluer is equipped with a spray gun, the corresponding spray glue must be selected. It is also necessary to consider the function of the spray gun control system. If the spray gun control system is a hot melt method, it is necessary to use hot melt spray glue; if the spray gun control system does not need to be heated, it is necessary to use cold spray glue.