Functions and requirements of inner bags of container bags
Some specific products require container bags, which have the following functions, including but not limited to:
·As a barrier for oxygen
·As a barrier to moisture
·As a barrier for chemicals
·Reduce static charge
Common use 1: fine powder
The flexible container bag with coating film and leak proof strip is very suitable for all kinds of powder products, but when the leak proof strip is not enough to prevent the leakage of fine products from the sewing line, the use of polyethylene inner bag is a good solution. The inner bag can be purchased separately and put into the container bag, or the container bag containing the inner bag can be purchased, so that the packaging process will be more efficient. The inner bag also provides the function of a moisture barrier layer, which can not only keep the moisture in the bag, but also block the external moisture, which is very important for fine powder products.
Common use 2: food grade products
Flexible container bags are becoming more and more popular in the food and food related packaging industry. If the product to be packaged is powder, granular and mobile, the food grade inner bag can keep the product fresh and free from pollution. If the food is powder, the inner bag is convenient for unloading, so that the end user can take out all the food from the container bag.
Common use 3: pharmaceutical products
Pharmaceutical products are similar to food. The strict food grade standard makes the demand for inner bags inevitable. In addition, many drugs are sensitive to moisture, ultraviolet light and other factors, which makes the use of inner bags indispensable when transporting these drugs.