METHOD FOR WELDING THE INNER LAYERS OF MULTI-LAYER PAPER SACKS

摘要

For a method of welding multi-layer paper sacks with weldable inner surfaces, the outer layers are folded back from the weldable inner layer during welding. The welding energy reaches the inner layer directly. The welding process is substantially shortened in comparison with know methods, and both the production time and processing time with such paper sacks is reduced.