The ABCs of FIBCs: How Bulk Bags are Made
When selecting a manufacturer for FIBC bulk bags, understanding specifications such as the construction material, available sizes, coatings, and joining methods is essential for effectively shipping FIBC bags, supplier powders, and granulated products. The craftsmanship involved in the production process—from raw material quality to cutting, sewing, and forming—plays a significant role in extending the lifespan of your FIBCs.
A reputable FIBC manufacturer will comply with industry standards and be guided by quality assurance protocols, such as ISO 21898:2004, which focuses on flexible intermediate bulk containers for non-hazardous goods. These companies are dedicated to enhancing employee performance, minimizing waste, and improving overall efficiency. You’ll also find a strong commitment to quality control integrated into all business and manufacturing processes.
Key Specifications for FIBC Bulk Bags
Numerous specifications are designed to meet Department of Transport (DOT) requirements for safe transportation, including the denier (thickness of individual threads), fabric weight (GSM), and yarn and fabric strength. These engineering specifications allow for the design of each bag to withstand various stress tests, such as drop and jerk forces, which can impact bag integrity during transport.
When purchasing an FIBC, the most critical specifications to consider include bag capacity, which typically ranges from 500 to 4,000 pounds when filled. Additionally, you should evaluate the styles and types of FIBC bags to determine which will best suit your storage and transport needs:
- Type A FIBC – No Electrostatic Protection
- Type B FIBC – Surface Breakdown Voltage of less than 6kV
- Type D FIBC – Static Dissipative
Within these categories, various styles are available, including rectangular or four-panel bags, duffle-top bags, and circular bulk bags. The construction methods are similar across styles, differing primarily in material, size, and shape.
The Manufacturing Process of Bulk Bags
This melted resin is formed into PP sheets, which are then stretched by rollers and cut to size. The tapes are wound onto bobbins to initiate the weaving process, producing the fabric used for FIBCs. Special looms are utilized to create either circular bags or U-panels for different bag styles.
If a coating is required, the fabric undergoes a vacuuming process to eliminate dust particles before being passed through a static eliminator. A lamination procedure applies a polypropylene protective layer, enhancing the bags’ resistance to moisture and sifting, while breathable fabric bags remain uncoated.
At this stage, bags are printed using FDA-approved ink suitable for food contact, ensuring quick drying to prevent smearing. A computerized system controls the precise cutting of the woven fabric into the sizes needed for assembly.
Finally, skilled employees complete the process by sewing the fabric pieces together in a clean room that meets FDA sanitation requirements. Filler cords are added to the seams, and the bags undergo various tests to comply with UN regulations.
Why Choose Sudarshan Add Pack
When looking for an FIBC supplier, consider Sudarshan Add Pack, a premier manufacturer and distributor of diverse types, styles, and sizes of FIBCs. We offer cost-effective solutions for transporting powdered or granulated goods. From sales and design to production, quality control, and supply chain logistics, our expert sales team can assist you in selecting the ideal bulk bags for your transport applications.
