PP Woven Bags Manufacturing Process: How Sack Production Works

11/13/2024 11:17:55 PM

Design and Planning for PP Woven Bags Manufacturing

1.Specification Development: Determine the dimensions, capacity, load-bearing requirements, and safety factors based on the intended use and regulatory standards (e.g.IS 9755, 16703).

2.Material Selection: Choose the appropriate fabric material based on factors such as strength (tensile and tear resistance), UV stability, electrostatic properties (if required), and compatibility with the contents (chemical resistance).

3.Type of Construction: Decide on the type of bag construction (e.g., with or without liners, coated or uncoated fabric, sift-proof seams).

Preparation for PP Woven Bags Fabric

Extrusion

The first step in producing PP Woven Bags is feeding polypropylene Polymer into an extruder, as per the specification finalized while designing.

Weaving process of fabric

The fabric is subsequently created by weaving the tapes together on looms. These tapes are woven using a circular weaving machine. These tapes create a strong enough material to bear the strain of transporting objects once they are interwoven.

Lamination

If required as per design, then the Woven fabric rolls are coated with LDPE polymers to protect the material from Moisture.

PP Woven Fabric: Comprehensive Guide to Its Usage and Advantages

Making of Flexo Printing Bag

1. Printing – As per the need of customer brand name, instructions and other packaging details are printed on the bags. This printing is done on Flexo printing machine and it is capable to print upto 6 colors designs on each side.

2. Cutting and Sewing – The printed rolls are then loaded on BCS machine which is automatically cut into required size and stitching is done accordingly.

Making of Reversing Bag

1. Reversing of Bag – Rolls are to be reversed in a reversing machine for inside a laminated bag.

2. Printing – As per the need of customer brand name, instructions and other packaging details are printed on the bags. This printing is done on Flexo printing machine and it is capable to print upto 6 colors designs on each side.

3. Cutting and Sewing – The printing rolls are then loaded on a BCS machine which is automatically cut into required size and stitching is done accordingly.

Making of Liner Bag

1. Printing – As per the need of customer brand name, instructions and other packaging details are printed on the bags. Thins printing is done on Flexo printing machine and it is capable to print upto 6 colors designs on each side.

2. Liner Insertion, Cutting and Stitching – Printed Rolls are to be send to BCS Liner Machine for insertion of liner, cutting and stitching.

Making of Valve bag for Cement

2. Cutting, Valve making and Stitching – Rolls are to be loaded on a Volvo Matic BCS machine for cutting, making valve and stitching.

Quality Control in PP Woven Bag Manufacturing

1. Inspection of Materials: Each batch of fabric and other materials is inspected for quality and consistency.

2. Sewing Inspection: During and after sewing, visual and mechanical inspections are conducted to ensure seams are properly aligned, stitched, and reinforced as required.

3. Burst Test: A random sample of bags is placed in a testing to determine whether or not they pass the test. This procedure usually must be completed before the bag is produced in large quantities.

Bailing, Packaging, and Shipping of PP Woven Bags

1. Final Inspection: Each completed bag undergoes a final inspection to verify dimensions, functionality and overall quality.

2. Packaging: The PP Woven Sack Bag can be packed neatly and conveniently because the compression is done on a bale press. Bags are folded or rolled and packed according to shipping requirements, often stacked on pallets for ease of handling.

3.Shipping: Bags are shipped to distribution centers or directly to customers.