This U.S. industry comprises establishments primarily engaged in manufacturing uncoated paper bags or multiwall bags and sacks. Cross-References. Establishments primarily engaged in-- ? Manufacturing single wall and multiwall bags from plastics unsupported film--are classified in U.S. Industry 326111, Plastics Bag and Pouch Manufacturing; ? Manufacturing bags of coated paper, of metal foil, or of laminated or coated combinations of plastics, foil, and paper bags--are classified in U.S. Industry 322223, Coated Paper Bag and Pouch Manufacturing; and ? Manufacturing textile bags--are classified in U.S. Industry 314911, Textile Bag Mills.