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Large Open-Top Flat Bottom FIBC Bags from China Suppliers and Factory - Ideal for Bulk Material Transport
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 Open-top Flat Bottom FIBC
0.5 – 1 Ton
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. With a standard load capacity of 0.5 to 1 ton, it is suitable for light-weight conventional materials such as sand, gravel and grain particles.
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Grid-bottom Reinforced Open-top Flat Bottom FIBC
1 – 2 Tons
The bottom is reinforced with multi-layer grid-shaped stitching. Compared with cross-bottom reinforcement, it adds horizontal and vertical stress support, resulting in stronger load-bearing capacity of 1 to 2 tons. The bag body bears force evenly during lifting without deformation easily, making it suitable for medium-weight materials such as plastic particles and chemical fertilizer raw materials.
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X-bottom Reinforced Open-top Flat Bottom FIBC
2 – 3 Tons
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, its load-bearing capacity can be increased to 2 to 3 tons with a higher safety factor. It is suitable for the lifting and transportation of 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 sling specifications. Brand logos, material info and warning signs can be printed. Can be upgraded to antistatic or acid-alkali resistant materials for special scenarios.
Main Applications
With the characteristics of simple structure and strong practicality, open-top flat bottom FIBCs are widely used in various industries:
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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.
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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.
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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.
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Other Sectors
Also used for waste recycling and industrial parts storage, serving as a cost-effective and versatile packaging solution.
Detail Picture
Frequently Asked Questions (FAQ)
Q What is the difference between cross-bottom, grid-bottom and X-bottom reinforced FIBCs?
The three types differ in stitching pattern and load-bearing capacity. Cross-bottom reinforcement is the most basic, supporting 0.5–1 ton for lightweight materials. Grid-bottom reinforcement offers 1–2 ton capacity with more even stress distribution. X-bottom reinforcement disperses stress to all four corners and supports 2–3 tons, making it ideal for heavy-duty applications.
Q 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. It is also possible to print brand logos, material information, handling instructions and warning signs on the bag surface to meet specific branding or compliance needs.
Q Are these FIBCs suitable for chemical or hazardous materials?
For chemical applications involving dry powdery or granular materials such as plastic particles or fertilizer raw materials, standard FIBCs work well. For more demanding environments, the bags can be upgraded to antistatic or acid-alkali resistant materials to ensure safety and compliance.
Q How do open-top flat bottom FIBCs improve warehouse space utilization?
The flat bottom structure ensures even weight distribution when filled, allowing bags to be stacked in multiple layers without tipping. This stable stacking capability helps maximize the use of warehouse floor space and transport vehicle capacity.
Q What industries are open-top flat bottom FIBCs most commonly used in?
They are widely used in agriculture (grains, root crops), construction (sand, gravel, cement clinker), chemical industry (plastic pellets, fertilizer), as well as waste recycling and industrial parts storage. Their simple structure and strong practicality make them a versatile solution across many sectors.
Q How should I choose the right bottom reinforcement type for my application?
Select based on the weight and nature of your material. For lightweight materials (under 1 ton) like grain or sand, cross-bottom reinforcement is sufficient. For medium-weight materials (1–2 tons) like fertilizer or plastic pellets, grid-bottom is recommended. For heavy materials (2–3 tons) like ore powder or metal particles, X-bottom reinforcement with side lifting slings is the best choice.