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Large Open-Top Flat Bottom FIBC Bags from China Suppliers - High-Quality Factory Options for Bulk Materials
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:
Type 1 Cross-bottom Reinforced Open-top Flat Bottom FIBC
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.
Type 2 Grid-bottom Reinforced Open-top Flat Bottom FIBC
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.
Type 3 X-bottom Reinforced Open-top Flat Bottom FIBC
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
The size and style can be customized according to requirements, including adjusting the length, width and height of the bag body and the specification of lifting slings. Brand logos, material information, warning signs and other content can also be printed on the bag. 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 the weight of the materials.
🔄 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 (FAQ)
Q
What is the difference between cross-bottom, grid-bottom and X-bottom reinforced FIBCs?
The three types differ in their bottom stitching pattern and load-bearing capacity. Cross-bottom reinforcement suits light loads of 0.5–1 ton; grid-bottom reinforcement handles medium loads of 1–2 tons with more even force distribution; X-bottom reinforcement is designed for heavy loads of 2–3 tons by dispersing stress to the four corners of the bag.
Q
Can open-top flat bottom FIBCs be customized in size and printing?
Yes. The bag body dimensions (length, width, height) and lifting sling specifications can all be customized. Additionally, brand logos, material information, warning labels and other markings can be printed directly on the bag surface to meet specific branding or regulatory requirements.
Q
Are these FIBCs suitable for chemical or hazardous materials?
For standard chemical materials such as plastic particles, resin pellets and fertilizer raw materials, open-top flat bottom FIBCs are well suited. For special scenarios involving static-sensitive or corrosive materials, the bags can be upgraded to antistatic or acid-alkali resistant materials upon request.
Q
How do open-top flat bottom FIBCs improve warehouse space utilization?
The flat bottom structure ensures even weight distribution when the bag is filled, allowing multiple bags to be stacked stably without tipping. This multi-layer stacking capability significantly maximizes both warehouse storage density and transport vehicle loading efficiency.
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What industries are open-top flat bottom FIBCs most commonly used in?
They are widely used across agriculture (grains and root vegetables), building materials (sand, gravel, cement clinker), the chemical industry (plastic particles and fertilizers), as well as waste recycling and industrial parts storage — making them a highly versatile bulk packaging solution.
Q
How should I choose the right bottom reinforcement type for my material?
Selection should be based on the weight and density of your material. 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, fertilizers), grid-bottom is recommended. For heavy materials exceeding 2 tons (e.g., ore powder, metal particles), X-bottom reinforcement with reinforced slings is the most suitable option.