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Why do cartons get wet on the ground without water?
This problem is really troublesome and difficult to solve, because the fiber used for carton base paper is hydrophilic and has strong water absorption. In wet weather, such as rainy season, when the relative humidity in the air is too high, the cartons will contact with the air directly, which will absorb the moisture in the air, thus producing corrugated boxes, and the whole cardboard will become soft.

In the face of inevitable complaints, even returns, fines, compensation, etc. Solving the problem of wet cardboard has become an urgent task for manufacturers to buy and supply second-hand cigarette cases. Is the problem of wet and soft cartons a bottom problem or a moisture problem? Only do everything possible to avoid water absorption in the process of base paper storage, corrugated board processing, carton processing, storage and transportation. The reason why the carton is wet and soft:

1. Moisture resistance of paper and paperboard

Base paper and corrugated paper, especially tile paper, have strong water absorption; When paper is exposed to humid air for a long time, the water price will increase, and the lateral ring compression strength of paper will decrease obviously. When the relative humidity is 85%, the ring compressive strength will decrease by 60%. Second, the corrugated board production process

The main way to solve the problem of wet and soft cartons is to choose the right materials and then look at the manufacturing process. The wet and soft factor of the carton is that it absorbs too much water. Therefore, in the process of carton production and processing, the moisture in the carton should be removed as much as possible.

Third, the storage environment:

After off-line, cardboard should exhaust steam to avoid condensation caused by temperature difference. The environment for storing cardboard or cartons should be ventilated. Cartons should not be placed directly on the ground, but supported by cushions (trays and splints). Pay attention to the gap between them when storing, so as to facilitate ventilation and heat dissipation.