| 摘要 |
<p>The present invention relates to a method for manufacturing a waterproof bag. The method comprises the steps of a) compressing film on one side of both sides of a bag; b) folding excess film of both ends of a bag material parallel to the bag moving direction toward the inside of the bag and heat-compressing the film; c) cutting the heat-compressed bag; and d) sewing one end of the cut unit. According to the present invention, after waterproof film is attached to one side or both sides of the bag and is cut, the excess film is folded toward the bag material and is heat-compressed. Thus, occurrence of defective bags is greatly reduced. Therefore, damage to the bag can be prevented by compression of excess film. Also, a deoxidizing composition is put into film manufacturing composition, so waterproof capability is more increased. Therefore, the degeneration of contents in the bag can be prevented.</p> |
