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Large-Capacity Storage and Transportation: Basic Structure and Types of Big Bags
Release time:
May 11,2026
Source:
Big bags, also known as bulk bags, are flexible transport packaging containers widely used for the bulk packaging and transshipment of powdered, granular, or lumpy materials.
Big bags, also known as bulk bags, are flexible transport packaging containers widely used for the bulk packaging and transshipment of powdered, granular, or lumpy materials. The main body is made of woven polypropylene or polyethylene fabric, equipped with lifting straps, filling and discharge ports, and other accessories to facilitate loading and unloading by forklifts or cranes.
Structural Components
Bag Body: Manufactured using warp-knitting or circular weaving techniques to create a fabric surface with sufficient tensile strength; can be designed with a circular or square cross-section as required
Lifting Straps: Sewn to the top or bottom of the bag body; typically feature a cross, parallel, or four-ring configuration for connecting to lifting equipment
Filling and Discharge Openings: The upper filling opening may be equipped with a drawstring or tie-off mechanism, while the lower discharge opening features a tie-off strap or discharge spout to control material flow
Common Types
By Lifting Method: Top-lift, bottom-lift, and side-lift
By Moisture Resistance: Standard type and moisture-resistant type (lined with PE film)
By Usage Frequency: Single-use and reusable
Big bags are designed to balance packaging strength with ease of handling, serving as bulk cargo packaging in industries such as chemicals, construction materials, food, and mining.
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