How Woven Bags Are Manufactured: An Inside Look

PP woven bags manufacturer in India are widely used in industries like agriculture, construction, and packaging due to their durability, versatility, and cost-effectiveness. These bags are ideal for packing and transporting grains, fertilizers, sand, cement, and various other products. But how are these sturdy and flexible bags made?

Tape Stretching and Winding

After extrusion and slitting, the narrow strips of polypropylene film are stretched to increase their tensile strength. Stretching the tape aligns the polymer molecules, making the tape much stronger and more durable. This stretching is usually done in a machine that simultaneously heats and elongates the film. Once the stretching process is complete, the tapes are wound onto spools for the weaving process.

Cutting the Fabric

After weaving the fabric, it is time to cut it into the required dimensions for the bags. The woven fabric is first measured according to the size specifications of the bag, and then it is cut into sheets. For tubular woven fabric, the cutting process will also involve sealing one side of the tube to create the bag’s bottom. This step can either be manual or automated, depending on the production scale and machinery used.

Printing and Branding

For many industries, printing logos, product details, or instructions on the bags is a vital aspect of the manufacturing process. Flexographic printing or rotogravure printing methods are often used for printing on woven PP bags. The woven fabric is passed through a printing machine where the desired graphics or text are transferred onto the surface.

Quality Control

Before the bags are dispatched, a quality control check ensures that they meet all the required specifications. This includes checking the bag’s dimensions, weight-bearing capacity, and overall strength. Some bags are tested for moisture resistance, especially if they have been laminated. Only bags that pass rigorous testing are approved for packaging and shipping.

Final Packaging and Distribution

The final step in the manufacturing process is packaging the PP woven bags for distribution. The bags are often compressed and baled for easier transport. Depending on the client’s requirements, the bags may be packed in bundles or pallets.

Conclusion

The production of PP woven bags is a detailed and highly efficient process, combining raw materials with advanced technology to create a versatile product. Whether used for storing grains, transporting sand, or packaging chemicals, these bags offer unmatched reliability. Companies like Sudarshan Add Pack continue to innovate in the production of PP woven bags, meeting the ever-growing demand with quality and precision.