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Large Open-Top Flat Bottom FIBC Bags - China Suppliers and Factory for Bulk Material Transportation

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Introducing our open-top flat bottom FIBC, a fundamental choice in the FIBC category, particularly popular among China suppliers and factories. This bag features a fully open top and a flat bottom without a discharge outlet, offering ease of loading and exceptional stacking stability.
Crafted from premium polypropylene (PP) woven fabric, the bag is designed with high-strength lifting slings in either a 2-loop or 4-loop configuration on the sides. The seams of the bag are meticulously reinforced with double-needle stitching to ensure durability. With a standard load capacity ranging from 0.5 to 3 tons and a safety factor of 5:1 to 6:1, this FIBC is ideal for the bulk transportation and storage of various granular, blocky, and powdery materials. Trust our factory for reliable and high-quality FIBC solutions.

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    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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    0.5 – 1 Ton
    Cross-bottom Reinforced

    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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    1 – 2 Tons
    Grid-bottom Reinforced

    The bottom is reinforced with multi-layer grid-shaped stitching, adding horizontal and vertical stress support. The bag body bears force evenly during lifting without deformation easily. Suitable for medium-weight materials such as plastic particles and chemical fertilizer raw materials.

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    2 – 3 Tons
    X-bottom Reinforced

    The bottom is reinforced with diagonal X-shaped stitching, dispersing stress points to the four corners. 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
    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.

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    Frequently Asked Questions (FAQ)
    Q
    What is an open-top flat bottom FIBC and what makes it different from other bulk bag types?
    An open-top flat bottom FIBC (Flexible Intermediate Bulk Container) features a fully open top for easy filling and a flat-structured bottom for stable stacking. Unlike bags with discharge spouts or conical bottoms, the flat base allows multi-layer stacking in warehouses and transport vehicles, maximizing space utilization while the open top enables fast loading via forklifts or conveyor belts.
    Q
    Which bottom reinforcement type should I choose for my materials?
    The choice depends on the weight and density of your materials. For light-weight materials (0.5–1 ton) like sand or grain, cross-bottom reinforcement is sufficient. For medium-weight materials (1–2 tons) like plastic particles or fertilizers, grid-bottom reinforcement offers better stability. For heavy materials (2–3 tons) like ore powder or metal particles, X-bottom reinforcement with reinforced lifting slings provides the highest safety factor.
    Q
    Can open-top flat bottom FIBCs be customized for specific industries or branding needs?
    Yes. These bags offer highly flexible customization options. You can adjust the bag body dimensions (length, width, height), sling specifications, and material type. Custom printing is also available for brand logos, material information, and warning signs. For specialized environments, the bags can be upgraded to antistatic or acid-alkali resistant materials to meet specific industry requirements.
    Q
    Are open-top flat bottom FIBCs suitable for food-grade agricultural products?
    Yes. Open-top flat bottom FIBCs are widely used in the agricultural sector for storing and transporting granular grains such as wheat, corn, and soybeans, as well as root and tuber crops like potatoes and onions. When required, food-safe PP woven materials can be used to ensure compliance with food handling and storage standards.
    Q
    How do I ensure safe lifting and transportation of filled FIBCs?
    Safe lifting depends on selecting the correct bottom reinforcement structure based on the load weight, and ensuring the lifting slings are rated for the filled bag's total weight. For heavier loads, X-bottom reinforced bags with reinforced side slings are recommended. Always inspect the bag for any damage before use and follow the manufacturer's rated Safe Working Load (SWL) guidelines.
    Q
    What industries commonly use open-top flat bottom FIBCs?
    Open-top flat bottom FIBCs are used across a wide range of industries including agriculture (grain and crop storage), building materials (sand, gravel, cement clinker), chemical industry (plastic pellets, resin, fertilizers), as well as waste recycling and industrial parts storage. Their simple structure, cost-effectiveness, and versatility make them one of the most widely adopted bulk packaging solutions globally.

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