Bottom gusset bags offer a cost-effective way of achieving a large filling volume. For this purpose, the bottom-folding bag is designed with an additional fold (W-fold) on its underside, so that the bag can expand considerably in the lower area. In contrast to the stand-up pouch/Doypack, the ends of the "W-fold" are not welded together, so that the resulting dovetail of the W-fold remains flexible. For this reason, the bottom-folding bag, in contrast to the stand-up pouch/doypack, has only limited stability.
The bottom-folding bag is often used for dry products such as instant products, dry soups or "fixed products".
Depending on your requirements, the following machine types can be used to process these bags:
- horizontal bag machines
- vertical bagging machines
- machines for filling prefabricated bags / bag filling machines