摘要 |
In an embodiment of the invention, a bottom seal of a plastic bag is strengthened by welding together 8 layers of plastic film. In one respect, an embodiment of the invention provides a method for manufacturing a bag pack that includes folding a 4-layered structure into an 8-layered structure, welding a bottom edge, and then unfolding the 8-layered structure before stacking 4-layered bags into a bag pack.
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