Warehouse storage for woven bags must avoid this fatal error

Because it was rainy recently, I wanted to recommend a film-coated woven bag to the customer that could be waterproof, but the customer was very angry to tell us that because of the waterproof woven bags that were set for some time before, they lost a lot of goods, and the customers said they were opening the cotton yarn. In the factory, there is a batch of goods that cannot be used temporarily, so they must be stored and stored. Because the rainy warehouses are somewhat worn out, their cotton yarns are somewhat damp, but because of lack of time, they were all stored in warehouses with waterproof woven bags. They were stored for more than two months, and they were found large when they were used. Some of the cotton yarns have become moldy. The customer is puzzled. Why does the use of waterproof woven bags of cotton yarn also moldy?
Do not know if you have encountered such problems? In fact, the waterproof woven bag is waterproof due to its good sealability and it is difficult for rainwater to enter. Therefore, this results in its relatively high sealing performance. The customer's cotton yarn is already relatively damp, and after sealing it into the film woven bag, the sealing performance is high. , so breathability is not good, which led to the cotton yarn mold in the bag, so Xiaobian here to remind everyone that although the film woven bag can waterproof, but the permeability is not high, if you want to be a long-term storage product packaging To ensure that the product is dry and carefully used.