Circular / Tabular Bags FIBC

Advantages of Circular / Tubular FIBC Bags

1. Increased Strength and Safety: Vertical seams are typically the weakest points on a standard bulk bag. By eliminating these corner seams, the circular fabric offers superior structural integrity, reducing the risk of tearing or seam failure under heavy loads.

2. Excellent Sift-Proofing: The absence of vertical stitching makes these bags naturally better at containing very fine materials (like powders, flour, or fine chemicals) without the product leaking or "sifting" through needle holes.

3. Optimal Shape Retention: When filled, a circular bag naturally rounds out uniformly, which distributes the pressure evenly against the fabric. This prevents bulging and helps maintain stability during transit.

4. Easier Handling & Forklift Access: The corner lift loops are typically sewn directly into the reinforced areas where the top fabric meets the body. This cross-corner or heavy-duty loop design ensures that the loops stay open and accessible, making it easier for forklift operators to hook and lift the bags.

5. Cost-Effective Production: Because the body is woven as a single piece, it requires less manual cutting and sewing during the manufacturing process compared to 4-panel or U-panel bags. This efficiency often translates to a highly competitive cost for bulk packaging.

FIBC Circular/Tubular bags are highly favored in industries that handle bulk solids, powders, and granular materials because their seamless design prevents leaks and handles heavy loads securely.

Main Uses by Industry

• Chemical & Pharmaceutical Industry: * Used for transporting fine chemical powders, plastic pellets, resins, detergents, and pharmaceutical ingredients.

  • Why: The seamless body prevents fine powders from sifting through corner needle holes.

• Agriculture & Farming: * Widely used for storing and shipping grains, seeds, wheat, corn, soybeans, nuts, and animal feed.

  • Why: Woven polypropylene allows the product to breathe while maintaining high weight capacities.

• Construction & Building Materials: * Ideal for heavy aggregates like sand, gravel, cement, crushed stone, clay, and dry mortar mixes.

  • Why: The high structural strength handles dense, heavy materials without tearing.

• Food Processing Industry: * Used for food-grade ingredients such as sugar, salt, flour, starch, and spices.

  • Why: When fitted with a food-safe liner, the circular shape offers excellent hygiene and prevents product contamination.

• Mining & Minerals: * Used to transport bulk minerals, coal, iron ore, lime, and metal concentrates.

  • Why: Can withstand the rugged handling and abrasive nature of raw mined materials.

• Waste Management & Recycling: * Used for collecting, storing, and transporting plastic scrap, recycled rubber crumbs, industrial waste, and debris.

For capacities ranging from 1000 kg to 2000 kg (1 to 2 metric tons), FIBC circular bags require specific, heavy-duty manufacturing standards to safely handle the extreme weight.

Here is what you need to look for regarding specifications, safety, and configuration for this capacity range:

1. Fabric Weight & Strength

• Fabric Thickness: Bags designed for 1000 kg typically use fabric weights around 160 to 180 GSM (grams per square meter). For a 2000 kg capacity, the fabric is much heavier, usually ranging from 200 to 240+ GSM to prevent bursting.

• Coated vs. Uncoated: If you are filling them with fine powders (like cement or flour) at that weight, the fabric will either be coated (laminated) or paired with a PE internal liner to prevent leakage and moisture ingress.

2. Safety Factor (SF) Ratings

Every bulk bag designed for this capacity must carry an official safety certification:

• 5:1 Safety Factor (Single-Trip Bags): This means a bag rated for 1000 kg is tested to withstand 5 times its capacity ($5000\text{ kg}$) before breaking. These are meant to be filled and emptied only once.

• 6:1 Safety Factor (Multi-Trip / Reusable Bags): Essential if you plan to reuse the bag. A 2000 kg bag with a 6:1 rating is tested up to $12,000\text{ kg}$ to handle the wear and tear of multiple uses.

3. Loop & Lifting Configurations

When lifting 1 to 2 tons, the loops bear all the stress. For circular bags, the best options are:

• Cross-Corner Loops: The loops are sewn into eight points along the body fabric, spanning across the corners. This keeps the loops standing upright, making it highly efficient for forklift tines to grab without manual assistance.

• Stevedore Straps: An additional heavy-duty belt connecting the lifting loops, allowing a single crane hook to lift the entire 2000 kg load safely.

4. Standard Dimensions for 1000kg - 2000kg

Because these are circular/tubular, the footprint stays relatively uniform, while the height changes based on the density of your product:

• For 1000 kg (e.g., Sand/Aggregates): Common dimensions are roughly $90 \times 90 \times 90\text{ cm}$ or $90 \times 90 \times 120\text{ cm}$.

• For 2000 kg (or low-density materials): The height typically increases significantly, often ranging from $95 \times 95 \times 160\text{ cm}$ up to $105 \times 105 \times 200\text{ cm}$.