Open‑mouth Block‑bottom Kraft Paper Bag

Multi‑wall open‑mouth block‑bottom kraft paper bags are made of 2‑5 plies of 80‑100 g high‑strength extensible kraft paper. With pasted block‑bottom structure and fully‑open top, they fit manual and conventional open‑mouth filling lines, sealed by stitching or heat‑sealing after filling. Optional M‑fold side design expands inner volume when filled, keeps bags well‑shaped without bulging for stable stacking; empty bags can be compactly folded to cut storage and freight cost. It supports multi‑color flexo‑printing for logos, specifications and warning marks. PE liner is available for moisture‑proof to avoid powder caking. Micro‑perforation can be added for air release and reduce bursting risk. Suitable for 10‑50 kg powder and granular goods such as chemicals, mineral powder, feed and building‑material powder. Paper‑based material is recyclable to meet overseas environmental‑protection standards.

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