MANUFACTURING METHOD OF WATERPROOF BAG AND WATERPROOF BAG MADE BY THE SAME

摘要

The present invention relates to a waterproof bag manufacturing method comprising the steps of: a) squeezing a film or films onto one face or both faces of a bag; b) thermally squeezing a surplus film of both ends of a bag fabric parallel to a bag proceeding direction after folding the films inward; c) cutting the thermally squeezed bag; and d) sewing one end of the cut portion. A waterproof film or waterproof films are adhered onto one face or both faces of the bag and then cut, then the remaining surplus film is folded toward the bag fabric and then is thermally squeezed to dramatically reduce the occurrence of defective products, and there is an advantage of preventing breakage of the bag through squeezing of the surplus film. In addition, a deoxidized composition is input to a film manufacturing composition to further improve the waterproof function, thereby preventing the contents from being denatured.