The window bag forming method is to combine a narrow width plastic film between two paper materials, and the bottom layer is compounded with the full width plastic film
The window bag is molded by combining a narrow plastic film in the middle of two sheets of paper, the bottom layer of which is then composited with the full sheet plastic film ...
The molding method of the strip window bag is to combine a narrow plastic film between two pieces of paper, and the bottom layer is compounded with the full plastic film