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Foundational Considerations: Manufacturing Processes and Material Characteristics of Big Bags
Release time:
May 18,2026
Source:
The performance of big bags is closely related to the base fabric materials and manufacturing processes used.
The performance of big bags is closely related to the base fabric materials and manufacturing processes used. Understanding these characteristics helps in making appropriate selections based on the nature of the cargo.
Base Fabric Material: Polypropylene is the primary raw material, which is extruded and drawn into flat filaments, then woven into fabric using either a circular or plain weave. Polypropylene features low density, high strength, and resistance to acids and alkalis. For cargo requiring high moisture resistance, a layer of polyethylene inner film can be heat-sealed inside the bag to form a barrier layer.
Manufacturing Process: After the base fabric is cut, sewn, and fitted with lifting straps and accessories, it must undergo random tensile strength testing to ensure that the seam strength between the straps and the bag body meets load-bearing requirements. UV-resistant ton bags incorporate anti-aging additives into the raw materials, which can extend their outdoor storage life.
Key Specifications: Safety Factor—the ratio of the rated load to the test load—reflects the product’s safety margin. Users can evaluate suitability based on this factor.
When selecting ton bags, consider the base fabric’s weight per unit area, the sling stitching method, and whether additional features such as moisture resistance or UV protection are available to ensure the packaging solution aligns with the cargo’s storage and transportation environment.
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