PP woven bag is commonly used in industries such as fertilizer, chemicals, food and animal farming,… The production procedure of PP woven bag in a prestigious center includes :

• Creating PP fibers : PP plastic granules are sent to a hopper of the fiber generating machine, then will be transferred to the extruder by a vacuum and get melted by heat, after that the screws will push them into a mold which has the required length and width. The plastic layer is formed through a shaped cooling water tank, then will go into the behind-shaft where a knife will cut it into fibers which afford the required width ( 2-3mm). Finally, the fibers will be sent to the heating body to stabilize their shape and then to the spinning machine. During the process of generating fibers, the waste fibers, bavia of the plastic film will get recycled by vacuuming, shredding and returning to the extruder.
• Weaving PP fabric: PP rolls are put into a four-shuttle circular room to be weaved into PP fabric tubes, then the knife will cut them into smaller PP fabric pieces, and a certain mechanism will do the last part.
• Laminated PP film : PP rolls will be sent to the laminating machine by forklifts, the PP cloth is coated with a thick PP plastic to strengthen the bonding of the moisture-proof fibers.
• The bag shape forming system: The laminated PP rolls and a Kraft paper tube will be sent to the bag shape forming system. In here, PP fabric will get its logo, then be wrapped with Kraft tape and become a tube. Through the system, knife cuts the tube and valve and forms the tube’s shape push it out by conveyor.
• Head sewing machines, packaging process : the bag’s tube will be sent equally to the automatic valve folding system and the head sewing machine, be packaged and go through the chain system. The finished package will be pushed out by the conveyor.
• Packaging: The packages will be checked carefully, compressed and packed, and then transferred to the warehouse by forklifts.