COSEK white cylindrical ton bag liquid/powder material leak proof packaging

1. Leak-proof Sealing: Professional Design to Prevent Liquid/Powder Leakage

The core function of COSEK's cylindrical bulk bags is "leak-proof": The outer white PP woven fabric uses an "anti-static formula" (resistivity ≤10⁹Ω·m) to prevent static sparks caused by friction of powdered materials (suitable for flammable materials like coatings and plastic pellets). The inner layer consists of a 0.1mm-thick PE film (thermally bonded to the outer layer), forming a "double-layer seal." The bag opening features a "screw cap + nitrile rubber sealing gasket" combination (gasket compression ≥30%), ensuring no leakage even for high-viscosity liquids (e.g., emulsions, paints)—tested leakage rate ≤0.02% (test conditions: filled with water and dropped from 1m height three times). Additionally, the "reinforcement rings" on both sides of the bag (white PP woven straps, 5cm wide) enhance pressure resistance, preventing deformation or rupture due to internal pressure.

2. Cylindrical Structure: Optimized Design for Even Load Distribution and Stable Stacking

Compared to traditional square bulk bags, the cylindrical design's key advantage is "even force distribution": When filled with liquids or pastes, the material naturally forms a circular cross-section, evenly distributing pressure along the bag walls without the "stress concentration" seen in square bags (where corners bear excessive pressure, increasing rupture risk). This structure ensures greater stability, even when stacked (up to 6 layers), reducing tipping risks. Moreover, the cylindrical shape occupies 15% less floor space than square bags of the same capacity, making it ideal for dense warehouse storage and improving space utilization.

3. Durability & Damage Resistance: Stable Performance for Harsh Transport Environments

To withstand logistics challenges like bumps and compression, this bag's materials and processes are reinforced:  
- The white PP woven fabric has a tensile strength ≥40MPa (20% higher than standard), enduring impacts from 2.8-ton loads without damage;  
- The handles use red nylon straps (with UV-resistant fibers), preventing brittleness under direct sunlight (aging test: after 1,000 hours of exposure, strength retention ≥88%);  
- The bag's bottom features "thickened reinforcement" (25% thicker), enhancing abrasion resistance on pallets (tested for 10+ uses, 4 more than standard bags).

4. Customization: Tailored Solutions for Special Material Needs

We offer deep customization for different material properties:  
- For liquids: Adjust PE film thickness (0.08mm–0.12mm) or select corrosion-resistant materials (e.g., EVA film) for acids/alkalis;  
- For powders: Add "vent valves" to balance internal pressure and prevent rupture from compaction during vibration;  
- For high-temperature materials: Use "heat-resistant PP woven fabric" (withstands up to 80°C, suitable for pre-drying storage of coatings);  
- Labels: Print material names, components, hazard warnings (e.g., "flammable," "corrosive"), complying with GB 190 (hazardous goods transport packaging standards).

5. Technical Specifications: Data-Backed by Authoritative Testing