Open bags are mostly used for flour, animal feed, seeds, pellets, grill coal, pharmaceutical products, and other powdered materials. As the name suggests, they are open on one side (top), where they are closed after being filled, usually by stitching.
Depending on the size and material that is filled into them, they can withstand a weight from 5 to 50 kilograms. They can be produced from 1 to 4 paper layers, whereby the outer paper layer, depending on the customer’s request, may be white or brown, with a print in 6 colors, or without it. The print can be applied to the bag’s body, and/or its bottom in the aforementioned number of colors. If the bag is multi-layered, the layers may be composed of paper, HDPE foil or PE coated paper. HDPE foil or PE coated paper are used if the material filled into the bag is hygroscopic or greasy.
Depending on the customer’s needs, we can perforate the outer and/or inner layers of the bag. Microperforation of the paper allows for increased anti-slip properties of the filled bag on a pallet, and what is more important, it allows the air to leave the bag more easily while the material is being filled into the bag.
In addition to the aforementioned, we can also offer to cut out a finger grip on the top of the bag, which makes the manual opening of the bag while it is being filled easier.