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Large Open-Top Flat Bottom FIBC Bags - China Supplier Factory for Bulk Material Transportation and Storage
Core Classification (By Bottom Reinforcement Structure)
According to different bottom reinforcement processes, open-top flat bottom FIBCs can be divided into three types, and the structure directly affects the load-bearing capacity and lifting stability:
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Cross-bottom Reinforced
0.5 – 1 Ton Capacity
The bottom is reinforced with cross-stitching technology, featuring a simple structure and low production cost. The stress points are concentrated at the cross seams. Suitable for light-weight conventional materials such as sand, gravel and grain particles.
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Grid-bottom Reinforced
1 – 2 Ton Capacity
The bottom is reinforced with multi-layer grid-shaped stitching. Compared with cross-bottom reinforcement, it adds horizontal and vertical stress support. The bag body bears force evenly during lifting without deformation easily, making it suitable for plastic particles and chemical fertilizer raw materials.
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X-bottom Reinforced
2 – 3 Ton Capacity
The bottom is reinforced with diagonal X-shaped stitching, which disperses the stress points to the four corners of the bag body. Combined with reinforced side lifting slings, it achieves a higher safety factor. Suitable for heavy materials such as ore powder and metal particles.
Core Features
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Easy Loading
The fully open top design allows for fast loading with forklifts or conveyor belts, greatly improving loading and unloading efficiency and being suitable for large-batch material turnover.
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Stable Stacking
The flat bottom structure ensures even force distribution, enabling multi-layer stacking after being filled without easy tipping, thus maximizing the utilization of warehouse and transport vehicle space.
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Flexible Customization
Size and style can be customized including bag dimensions and lifting sling specifications. Brand logos, material information and warning signs can be printed. For special scenarios, it can be upgraded to antistatic or acid-alkali resistant materials.
Main Applications
With the characteristics of simple structure and strong practicality, open-top flat bottom FIBCs are widely used in various industries:
🌾 Agricultural Products Sector
Used for loading granular grains such as wheat, corn and soybeans, as well as root and tuber crops like potatoes, sweet potatoes and onions, meeting the needs of large-scale storage and long-distance transportation.
🏗️ Building Materials Sector
Suitable for packaging blocky materials such as sand, gravel, cement clinker and lightweight aggregates, adapting to lifting operations at construction sites and reducing material scattering loss.
⚗️ Chemical Industry Sector
Applied to transport dry powdery or granular materials such as plastic particles, resin pellets and chemical fertilizer raw materials. The corresponding bottom reinforcement structure can be selected based on material weight.
♻️ Other Sectors
Also used for waste recycling and industrial parts storage, serving as a cost-effective and versatile packaging solution.
Detail Pictures
Frequently Asked Questions
❓ What is the difference between cross-bottom, grid-bottom and X-bottom reinforced FIBCs?
The three types differ in their stitching pattern and load-bearing capacity. Cross-bottom reinforcement handles 0.5–1 ton and suits lightweight materials. Grid-bottom reinforcement supports 1–2 tons with more even stress distribution. X-bottom reinforcement disperses stress to all four corners and can carry 2–3 tons, making it ideal for heavy industrial materials.
❓ Can open-top flat bottom FIBCs be customized in size and printing?
Yes. The bag dimensions (length, width and height) and lifting sling specifications can all be customized to meet specific requirements. Additionally, brand logos, material information, warning signs and other content can be printed directly on the bag surface.
❓ Are antistatic or acid-alkali resistant versions available?
Yes. For special application scenarios — such as transporting flammable or chemically reactive materials — open-top flat bottom FIBCs can be upgraded to use antistatic or acid-alkali resistant materials to ensure safe and compliant transportation.
❓ What industries are open-top flat bottom FIBCs most suitable for?
They are widely used in agriculture (grains and root crops), building materials (sand, gravel, cement clinker), the chemical industry (plastic particles, resin pellets, fertilizer), as well as waste recycling and industrial parts storage, making them a versatile bulk packaging solution.
❓ How do open-top flat bottom FIBCs improve warehouse space utilization?
The flat bottom structure ensures even force distribution across the base of the bag. Once filled, the bags can be stacked in multiple layers without tipping, which significantly maximizes the use of warehouse and transport vehicle space compared to bags with irregular bottoms.
❓ How should I choose the right bottom reinforcement type for my materials?
Choose based on the weight and density of your materials. For lightweight materials under 1 ton (e.g., grain, sand), cross-bottom reinforcement is sufficient. For medium-weight materials between 1–2 tons (e.g., plastic pellets, fertilizer), grid-bottom is recommended. For heavy materials between 2–3 tons (e.g., ore powder, metal particles), X-bottom reinforcement with its higher safety factor is the best choice.