The SBR series automatic paper bag making machines are suitable for Kraft and coated paper to produce square bottom paper bags.
They use roll paper as unwinding/input material. Side gluing, folding, tube forming, cutting, bottom folding and gluing to output of finished bag, all done in one continue work-flow.
The "two-layer paper" option allow the machine makes the bag has two layers paper but not only one. The two layers paper bag will have a much better sealing effect on bottom and stonger. The option contains 2 sets of roll paper unwinder and the servo control gluing system for two layers paper.