Ultrasonic PP Non Woven Bag/Heat-weld PP Non Woven Bag is taking place of traditional stitching non woven bags due to below advantages. 1.Cheap Cost Ultrasonic non woven bags made by fully automatic machine which requests few workers.Usually one technician and one packing worker are enough for a production line.But for stitched non woven bags,there are lots workers specializing in different …