As we all know, cartons cannot be used once they have come into contact with water. So how can we protect them? And what are the moisture‑proofing methods for cartons?

In humid environments such as summer, even if cartons are placed away from direct water sources, they can still become damp due to the moisture in the air, significantly reducing their strength and burst resistance. Therefore, applying moisture‑proof treatment to the cartons themselves is very important.

Generally speaking, moisture‑proof treatment for cartons involves applying a waterproof coating to the outer surface. This treatment method can be divided into two types: temporary waterproofing and long‑term waterproofing.

Temporary waterproofing involves applying a wax emulsion coating to the surface of the carton. When water droplets fall on the carton, they will not penetrate but will slide off, providing good waterproofing effect. However, because wax has poor adhesion and tends to peel off easily, the effect will diminish after a period of time. Therefore, this type of waterproofing is called temporary waterproofing.

Long‑term waterproofing involves applying a waterproofing agent containing rosin derivatives or carboxylated polymer emulsions to the carton. This substance is compatible with wax and adheres firmly to the carton surface, remaining effective for a long time, thus providing long‑lasting waterproofing.

1. During the production and processing of cartons, applying moisture‑proof oil or a water‑repellent agent to the carton can improve its strength and achieve better moisture protection. Of course, this will increase the cost significantly.

2. If the cartons are not treated with moisture‑proof oil or water‑repellent agent during production, attention must be paid to the storage environment. Storing them in relatively dry and well‑ventilated areas reduces the risk of moisture absorption. A special reminder: cartons should not be placed directly on the floor; they should be elevated using pallets or similar supports.

3. When ordering cartons, carefully calculate the required quantity. If you order too many and store them for too long, they become more susceptible to moisture. It is advisable to plan for about one month's supply.

From the above, we can understand that moisture‑proofing cartons is not solely the responsibility of the manufacturer; users also need to take proper measures to keep cartons dry.