Use: The valve paper sacks are put the bag bottom with valve on the filling machine. After filling the material, it is packed into a square body. The inner valve sacks will use the filling pressure to seal the valve ,also can be sealed with the hot melt glue. the outer valve sacks will be sealed by folding the valve inside.

Apply to:It is mainly used for packing food, animal feed,chemical powder, mineral products  other powder  granular solid materials  so on. It is a popular type of packaging bag which widely used in many lines.

Specifications:  

width:  34-60cm

Length: 34-80cm

Bottom width: 9-16cm

Printing color: 1-8colors

Layers: 1-5layers

Custom: yes