Products Description
Coated Bulk Bag is a flexible bulk‑packaging solution engineered for the sealed transfer of bulk materials. A special protective coating is laminated onto the substrate of conventional bulk bags, providing excellent overall flexibility and outstanding load‑bearing performance. It effectively blocks moisture, dust, and fine‑particle leakage. Compatible with standard lifting and forklift‑handling operations, it significantly reduces material loss and contamination risks during bulk‑material transfer. Widely used for transporting chemical raw materials, building‑material powders, grains, and other bulk commodities, it helps enterprises streamline transfer workflows and lower overall packaging costs.
Working Principle
Substrate Load‑Bearing
The high‑strength woven substrate acts as the primary load‑bearing component. It evenly distributes mechanical forces generated during lifting and transportation to secure fundamental load‑bearing capability.
Interface Bonding
The coating achieves thorough wet‑out bonding with woven‑fibre surfaces. Delamination and peeling do not occur, maintaining consistent protective performance throughout long‑term service.
Coating Barrier Function
The continuous surface‑laminated protective coating forms a dense isolation layer across substrate gaps, blocking penetration pathways for fine particles and moisture.
Flexible Cushioning
The flexible bag structure absorbs impacts during transportation. It prevents internal materials from compression‑induced damage and protects the bag body against scratches from sharp objects.
Product Advantages
The dense, uniform surface coating effectively prevents moisture ingress and dust leakage, avoiding material spillage and moisture‑related degradation during transit.
The coating has inherent hydrophobic properties. It stops external moisture from seeping into contained materials even during short‑term outdoor storage.
The substrate forms a firm bond with the coating, delivering excellent tensile strength and tear resistance. Bag rupture is unlikely to occur during lifting and transportation.
The smooth inner coating resists material adhesion. Very little material residue remains inside the bag after discharge, simplifying cleaning and enabling repeated circulation.
The coating is odour‑free with no harmful substance leaching. It permits direct contact with food‑grade materials and meets applicable environmental and safety standards.
Processes and Technologies
Thermal Lamination Process
Low‑temperature thermal lamination creates robust integration between coating and substrate. High coating adhesion prevents peeling even after extended use.
Seamless Coating
Continuous seamless‑coating technology produces consistent, gap‑free coating layers, eliminating potential leakage weak points caused by partial uncoated areas.
Targeted Reinforcement
High‑stress zones such as lifting loops and bag openings receive targeted reinforcement, greatly boosting local tear resistance and load‑bearing capacity.
Application Scope
Grains and Cereals
Suitable for bulk packaging and transfer of grains and cereals. It blocks external impurities and moisture to preserve material cleanliness.
Building‑Material Granules
Used for transporting and storing cement, dry‑mix mortar and other building‑material bulk goods to mitigate dust pollution during handling.
Mineral Powder Handling
Well‑suited for bulk transportation of metallic and non‑metallic mineral powders. It prevents fine mineral‑powder leakage that leads to material loss and on‑site contamination.
Maintenance Instructions
Treat empty bags gently. Do not drag them over rough surfaces, as hard objects may scratch and abrade the coating.
Thoroughly clean empty bags after use and store them in cool, dry warehouses to avoid substrate moulding and degradation caused by dampness.
Perform visual spot‑checks on long‑stored bags. Inspect for coating warping or damage, and confirm bag integrity before reuse.
Stack bags of different specifications and intended uses separately. Avoid heavy compressive loading, which may cause coating cracking from prolonged folding.
FAQ
Q: Will the coating of Coated Bulk Bag peel off?
A: No. Special lamination technology creates deep bonding between the coating and substrate. Delamination and peeling will not happen under normal operating conditions.
Q: Can Coated Bulk Bag be reused?
A: Yes. Once internal residues are fully cleared, bags free of obvious damage can go through multiple circulation cycles for repeated use.
Factory Environment
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