Professional China Square Bottom Kraft Paper Bag - YuDu brand of Square Bottom Bag – Yudu

Square bottom bag is a bag construction comprising an outer bag and an inner bag contained therewithin and a method of making the same. The bag has an independent unitary construction. The bag construction is made from a tube length having inner and outer portions, by cross sealing the inner portion and folding the outer portion into a rectangularly shaped bottom.
Valve bags commonly known as pasted bag, Target material are filled into the bag from its filling spout on the upper or lower bottom. Valve bag requires specialized equipment. Package would form itself into a rectangle during the filling process. Valve bag is very efficient for filling and make it neat and tidy to palletizing. Stable stacking on the pallets makes it safer for transportation. Vavle bag is widely applied to food grade powder, chemical powder, fertilizer, medicine or mineral powder or kernels etc. Also there is large sized valve bag which is widely appied to fumed silica and fine Nami Grade Powder. It is like a carton, with different length, width and height. It is “customized” according to the size of the products to be packaged.

The square bottom bag generally has 5 sides, front and back, two sides, and bottom. The unique structure of square bottom bag determines that it is more convenient to pack three-dimensional goods or square products. This kind of bag not only takes into account the packaging meaning of plastic bag, but also fully expands the new packaging idea, so it is now widely used in people’s life and production.