Production: It is made by pure wood pulp paper, cut the right length while make the paper as tube(the tube can be multi-wall, 2-5 layers, also can be added a platic film between the papers), and then make one of the block bottom, after this, make the top with valve(normally the inner valve should be coplexed with plastic, the outer valve isn't mube required).
Use: The valve 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 and other powder granular solid materials and so on. It is a popular type of packaging bag which widely used in many lines.
Shijiazhuang Kangyi Packaging Co.,Ltd.
Tel / Whatsapp: +86 19932126528 (Grace)
Add:Yuanshi Country Industrial Zone, Shijiazhuang City,Hebei Province,China
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