In order to improve the performance of sack products, we can coat the fabric with a layer of plastic film to achieve the effect of moisture resistance, but some products need to have a certain exhaust effect when packaging.
The coating process will make the sack sealed, so the product must be kept dry during the filling process, and the purpose of moisture-proof during transportation, loading and unloading and storage. In order to achieve exhaust, it is necessary to punch holes on the surface of the sack, that is, the punching process. Punching the sack can not only meet the drying requirements of the product, but also meet certain exhaust requirements, is the most commonly used method. We know that different industries now often use gunny bags, and their packaging is also different. Different packaging items, the required form of packaging is also different. For example, bulk products such as grain are packaged in a simple form and can be sealed with a line to meet the requirements of use, so there is no need to waste too much time. If the product needs to be vacuum-packed to ensure the quality after processing, it needs to be heat-sealed.
The sack wholesaler also told us that if it is corn, soybeans, sweet potatoes and other agricultural products, he does not have high requirements for the sack itself, so there is no need to seal the packaging and carry out effective classification to improve work efficiency.