1200 Kg Four-Loop Uncoated FIBC Bulk Bag For Mineral Handling

1200 kg Four-Loop Uncoated FIBC Bulk Bag for Mineral Handling

Problem | Why Mineral Packaging Requires More Than a Weight Rating

Minerals, ore particles and other dry industrial materials often have high bulk density. Their weight is concentrated inside the package, while filling, lifting, transport and storage create different loads on the FIBC body, seams and lifting loops.

For this reason, selecting a mineral bulk bag only by its external dimensions or stated load capacity can lead to an unsuitable specification. Fabric strength, lifting-loop construction, seam design and the actual volume required by the material must also be evaluated.

During lifting, the packed material applies pressure to the body panels. That load is transferred through the side seams and lifting-loop attachment areas to the forklift or lifting equipment.

Material characteristics also vary considerably. Fine mineral powder, free-flowing granules and sharp-edged ore pieces may all weigh 1200 kg, but they do not require the same coating, liner, seam or fabric configuration.

Cause | What Causes Bag Deformation or Specification Failure?

Selecting the Bag Without Calculating Filling Volume

The required volume should first be estimated using the material’s bulk density:

Required volume (m³) = filling weight (kg) ÷ bulk density (kg/m³)

A 90 × 90 × 90 cm bag has a theoretical geometric volume of approximately 0.729 m³. Its usable filling volume may differ because of body expansion, filling height, top construction and the behavior of the material.

For example, 1200 kg of material with a bulk density of 1600 kg/m³ requires approximately 0.75 m³. This shows why a real filling trial may be necessary rather than relying entirely on nominal dimensions.

Ignoring Warp and Weft Fabric Strength

The bag body uses white, uncoated fabric with a specified weight of 180 g/m². The production sheet specifies a minimum strength of 1600 N in both the warp and weft directions.

Warp strength is relevant to vertical loading and fabric elongation during lifting. Weft strength helps the body resist lateral expansion after filling.

These values describe the base-fabric requirement. They do not independently establish the safe working load of the complete FIBC, because finished-bag performance also depends on seams, sewing thread, loop attachment and complete-bag testing.

Treating Loop Strength as Complete-Bag Capacity

The product uses four soft lifting loops. Each loop is cut to a specified size of 7 × 145 cm, has a linear weight of 50 g/m and is specified with a strength of at least 18000 N.

The loops are installed along the side seams and sewn downward from the top of the bag body. This arrangement transfers lifting forces into the side panels instead of concentrating them only around the upper edge.

However, the loop-material strength should not be presented as the lifting capacity of the finished bag. Stitch length, sewing pattern, thread condition and the strength of the loop attachment area must also be controlled.

Assuming Uncoated Fabric Is Waterproof

The 180 g/m² body fabric is explicitly described as uncoated. An uncoated FIBC may be considered for dry materials that do not require a verified moisture barrier.

It should not be described as waterproof, moisture-proof or dust-proof without additional test data. Fine powder or moisture-sensitive minerals may require coated fabric, a PE liner or sift-resistant seam construction.

Solution | A Parameter-Based Four-Loop FIBC Configuration

This mineral FIBC Bulk Bag has nominal body dimensions of 90 × 90 × 90 cm and a specified load capacity of 1200 kg. Its suitability should be verified against the bulk density and physical characteristics of the intended mineral.

The large and small body panels use 180 g/m² white uncoated fabric. Minimum warp and weft strengths are both specified at 1600 N, providing measurable requirements in the two principal fabric directions.

Four side-seam lifting loops connect the bag body to the lifting system. The lifting-loop strength is specified at no less than 18000 N, while the soft loop construction facilitates engagement with appropriate forklift tines or lifting hooks.

The body panels are joined using an outward-folded double-needle chain stitch. The upper edge is folded outward and finished with a single line of stitching.

These construction details provide a defined production specification. Finished-bag performance must still be confirmed through inspection and the applicable complete-bag lifting tests.

Technical Specifications

Application | Suitable Uses and Technical Limits

Mineral and Ore Packaging

The bag can be evaluated for mineral particles and ore materials compatible with its 1200 kg rating, dimensions and uncoated construction. Bulk density, particle size, moisture content and sharp edges should be checked before production.

Sharp-edged ore may create puncture or abrasion risks. The 180 g/m² fabric weight alone does not prove a specific puncture-resistance or abrasion-resistance level, so a representative filling and lifting trial is recommended.

Internal Material Handling

The four-loop configuration can be used in mineral-processing facilities, factories and warehouses equipped with appropriate lifting equipment.

Forklift tines and hooks should be smooth and free from sharp edges. Improper tine spacing or concentrated loading may damage the loops even when the loop material meets its specified tensile requirement.

Road Transport and Warehouse Storage

The nominal 90 × 90 cm footprint can support preliminary pallet, vehicle and warehouse planning. Filled bags may expand beyond their nominal width, so final layouts should be based on a filled sample.

Because the fabric is uncoated, the bag should be protected from rain and uncontrolled moisture exposure. A liner or verified coated structure should be considered when moisture protection is required.

How to Choose | Mineral FIBC Selection Guide

Step 1: Define the Material

Provide the mineral name, bulk density, particle size, moisture content, flow characteristics and information about sharp edges. Powder, granules and ore pieces require different leakage, abrasion and filling solutions.

Step 2: Calculate the Required Volume

Divide the filling weight by the material’s bulk density. Allow additional space for actual filling behavior and bag expansion.

A 1200 kg target weight does not automatically mean that a 90 × 90 × 90 cm bag will suit every mineral.

Step 3: Confirm the Safety Factor

Request the safety factor and complete-bag test report from the supplier. A common 5:1 requirement for single-trip FIBCs must not be claimed unless it is supported by applicable testing.

The current production sheet does not specify a safety factor.

Step 4: Select the Top and Bottom Construction

An open top, filling spout or duffle top may be selected according to the filling equipment. A flat bottom or discharge spout may be required according to the unloading process.

The current document leaves the inlet and outlet fields blank, so these structures must be confirmed before ordering.

Step 5: Determine Whether a Coating or Liner Is Required

Uncoated fabric may be considered for compatible dry, coarse materials. Fine powder, moisture-sensitive material or products requiring contamination control may need coated fabric, a PE liner or sift-resistant seams.

Step 6: Review Loops and Seams

Check loop width, cut length, attachment length, sewing pattern, thread and complete-bag test requirements. For dense or sharp-edged minerals, production approval should follow a representative sample-filling test.

Step 7: Verify Regulatory Requirements

Dangerous goods require the applicable UN packaging classification, markings and test documentation. The wording “UN 2%” on the current sheet is not sufficient evidence of UN certification.

FAQ

1. Can this FIBC safely carry 1200 kg of mineral material?

The production sheet specifies a 1200 kg load capacity, ≥1600 N warp and weft fabric strength, and ≥18000 N lifting-loop strength.

Suitability for a specific mineral still depends on bulk density, particle shape, filling volume, safety factor and complete-bag testing. The 1200 kg value should not be presented as a certified safe working load without supporting test documentation.

2. Is the 180 g/m² uncoated fabric waterproof?

No verified waterproof performance is provided. The 180 g/m² value describes fabric mass per unit area, while “uncoated” confirms that no coating is specified.

Moisture-sensitive minerals may require coated fabric, a liner and a suitable top closure.

3. Does ≥18000 N loop strength mean one loop can support the complete bag?

No. This value describes the specified lifting-loop strength, not the capacity of the complete assembled FIBC.

Finished-bag performance also depends on the loop attachment, seam construction, lifting angle, load distribution and condition of all four loops.

4. Is this a UN-certified FIBC Bulk Bag?

The available information does not establish UN certification. No UN packaging code, testing standard, certificate or test report is provided.

The product should not be promoted as a UN-certified FIBC unless complete, verifiable documentation is supplied.

5. Can the bag be used for fine mineral powder?

That depends on particle size and leakage-control requirements. Fine powder may escape through woven fabric gaps or sewing needle holes.

A coated body, PE liner or sift-resistant seams should be considered, followed by a sample-filling test using the actual material.