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FIBC Flexible Container Bag Types & Selection Guide — Ruifa Plastic Packaging (Henan)

FIBC (Flexible Intermediate Bulk Container) is a mainstream industrial flexible packaging container, widely used for the storage and transportation of dry and fluid bulk materials. Different FIBC structures have distinct differences in shaping performance, sealing property, stacking stability and applicable scenarios. This guide systematically introduces five classic FIBC types, analyzes their structural advantages and limitations, and summarizes key selection factors including top opening styles. Supported by professional production and customized services, Henan Ruifa Plastic Packaging provides high-quality tailored bulk packaging solutions for various industrial scenarios.

Jun 04,2026

Five Common Types of FIBC Flexible Bulk Bags

01. U-Panel Bulk Bag (Industry Standard Type)

The U-panel bulk bag is the most widely used and universal standard FIBC in the industrial field. Its main body consists of three core fabric parts: one integrated fabric runs through the bottom and two sides of the bag to form a stable U-shaped structure, with two additional panel fabrics sewn on both sides of the U-shaped frame.

Manufactured by Henan Ruifa Plastic Packaging, U-panel bags feature high fabric fitting degree and exquisite stitching craftsmanship. They can form a regular square shape after filling and inflation. Custom internal baffles can be added to completely avoid bulging and deformation. With stable structure and high cost performance, U-panel bags are the preferred choice for storing and transporting building materials, grain, common chemical powder and other conventional bulk materials, serving as the standard procurement option for most enterprises.

02. Circular Bulk Bag (Tubular Bag, High Sealing & Cost-Effective Type)

Also known as tubular bulk bags, circular bulk bags have a simple structure composed of a seamless tubular bag body and an independent bag bottom. The whole bag body is woven with seamless tubular fabric without lateral splicing seams, and only the top and bottom need stitching and sealing.

There is a common misconception that circular bags are round after filling. In fact, they present a square or rectangular shape when fully loaded. Restricted by the seamless tubular structure, their independent shaping capacity is weaker than U-panel bags and four-panel bags, with slight bulging after filling and lower three-dimensional regularity.

The core advantages of Ruifa circular bulk bags lie in seamless structure and excellent leak-proof sealing performance, which effectively prevents fine powder leakage from splicing gaps. With mature production technology and competitive price, they are ideal for low-density fine particle materials with no high stacking requirements, delivering high cost performance for fine bulk material packaging.

03. Four-Panel Folding Bulk Bag (High-Shaping Warehouse Special Type)

The four-panel folding bulk bag is assembled by sewing four independent side panels and one bottom panel, which is a mainstream type for high-standard warehousing scenarios.

Among conventional FIBC products, four-panel bags have the best shaping performance. They remain upright and regular after filling, with better stereoscopic effect than U-panel bags and circular bags. The neat stacking performance greatly improves warehouse space utilization and avoids tilting and collapsing.

This type has more splicing seams, putting forward higher requirements for sewing technology. Henan Ruifa adopts dense stitching and edge reinforcement technology to solve the industry pain points of seam cracking and long-term load deformation, greatly improving service life and load-bearing safety. It is widely applicable to bulk materials requiring multi-layer stacking, standardized warehousing and long-distance transportation, and is the preferred option for standardized warehousing enterprises.

04. Baffled Bulk Bag (Q-Type Bag, High-Stability Stacking Type)

Baffled bulk bags, also called Q-type bags or partition bags, are upgraded FIBC products. Baffles are customized internal accessories, which can be installed on U-panel bags, four-panel bags and circular bags. Fixed cloth baffles or shaping ropes are sewn at the four inner corners of the bag to achieve forced shaping effect.

Ordinary non-baffled bags are prone to side bulging, corner sagging and body tilting after full loading, making neat stacking impossible. Ruifa customized baffled bags can lock the bag shape firmly, maintaining a vertical and square state after filling. They greatly improve stacking stability, warehouse utilization and transportation safety, fundamentally reducing collapse risks and material extrusion loss during transportation.

Among all types, four-panel baffled bags have the best comprehensive performance with high shaping, stability and load-bearing capacity, suitable for high-standard warehousing, multi-layer stacking, long-distance logistics and high-precision material packaging scenarios, and are mainstream high-end industrial packaging products.

Key Additional Factors for FIBC Selection

In addition to the core bag structure, the top style directly affects material filling efficiency, handling process and storage effect, which is a key detail for FIBC selection. Henan Ruifa supports customized top styles according to material characteristics, workshop equipment, handling procedures and warehousing requirements. The mainstream styles are as follows:

1. Full Open Top

The fully open top has no sealing structure or shelter, featuring a large filling caliber and fast feeding speed. It adapts to rapid filling of large equipment and is suitable for large-particle and high-fluidity materials with no strict dust and moisture resistance requirements. It can be matched with binding ropes and film sealing as required, with simple operation and high cost performance.

2. Drawstring Sealed Top

A cylindrical elongated nozzle is sewn on the top with a tightening binding structure to achieve complete sealing. It effectively prevents dust, moisture and material spilling, solving the problems of powder leakage, dust entering and material dampness, and is suitable for refined industrial materials requiring sealed storage and transportation.

3. Canvas Skirt Top (Industry Standard)

As the industry standard top style, the wide tubular canvas skirt is directly sewn on the upper part of the bag body, with thick structure and excellent tensile and wear resistance. Compatible with most conventional filling scenarios, it balances sealing performance and handling convenience with strong universality and durability, serving as the standard configuration of general bulk bags.

Customization Advantages of Ruifa Packaging

Henan Ruifa Plastic Packaging Co., Ltd. specializes in the R&D, production and customization of FIBC flexible bulk bags. We provide customized solutions based on material type, load-bearing standard, stacking mode, transportation scenario and equipment matching size. Our product range covers U-panel bags, circular bags, four-panel bags and baffled shaping bags, with customizable size, load capacity, top/bottom style, lifting belt, sealing and anti-static performance.

We implement strict quality control throughout the whole process from raw material selection, weaving, stitching and reinforcement to finished product inspection. We eliminate quality problems such as thread breakage, material leakage, deformation and unqualified load-bearing, providing high-cost-performance, stable and safe integrated bulk packaging solutions for various industries.