Since entering the rainy season in Guangdong in March, this is a big test for the paper industry such as kraft paper. In humid weather, when the relative humidity in the air is too high, the carton will directly contact the air and will absorb the moisture in the air. Too high water content will directly affect the printing quality and physical properties. So how do we take measures to prevent moisture?
1. Keep the storage warehouse dry and control the humidity. If conditions permit, add a dehumidifier or turn on a small fan to increase convection. When necessary, we can put some desiccant or the like, which can well prevent the damage caused by the humid air to the kraft paper.
It is forbidden to store chemicals or commodities with high water content and fat content, such as table salt, fertilizer, soap, sugar, cement, etc. Kraft paper should not be placed with items that are easily deliquescent, otherwise it will easily absorb moisture and deteriorate.
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Second, regularly check whether the bottom card board is damaged, and prevent kraft paper from directly contacting the ground. The height of the card board should be more than ten centimeters.
The card board uses a whole flat plate instead of a slat. This can greatly reduce the direct contact surface of the kraft paper with moist air, so as to achieve the effect of preventing moisture.
Third, the surrounding membrane should be solid, not only one layer to do formal work. When surrounding the film, the card board is also synchronized. Whether the surrounding film is strict and strict, and whether it can block the contact between the water vapor and the kraft paper to the greatest extent plays a vital role.
After unpacking the whole board of kraft paper, if it is not used up, it should be sealed with a surrounding film in time to reduce the contact time of the kraft paper with moist air.
4. The paper should be placed with a large gap between the card boards to facilitate air circulation. After the day is clear, you can open the windows to speed up the indoor air circulation and expel the moisture in the warehouse.
The most important thing about kraft paper moisture-proof is to plan ahead. As long as we take preventive measures and strictly follow the procedures, we can completely avoid such events as dampening of kraft paper.
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