Three-Paper One-Film External Valve Bag
Three-Paper One-Film External Valve Bag is an industrial packaging solution based on a multi-layer laminated structure.
It is named after its classic construction of three layers of kraft paper combined with one functional inner film, and features an external valve design for efficient filling and secure sealing.
This type of bag is widely used for packaging powdered and granular materials, making it one of the mainstream choices in industrial packaging.
It is mainly applied to tile adhesive, wall putty powder, dry mortar, cement, and other powder materials.
Compared with traditional packaging, it effectively addresses common issues such as poor moisture resistance and material leakage, and is highly trusted by construction teams on job sites.
Key Advantages
Maximum Protection
The combination of a tear-resistant outer kraft paper layer and a moisture-barrier inner film provides dual protection.
It effectively safeguards tile adhesive, putty powder, and similar materials during rainy seasons and long-distance transportation, with a leakage rate close to zero in practical applications.
Excellent Storage Performance
The square bottom structure allows filled bags to stand upright and remain stable.
Stacking height can reach 3–4 meters, increasing warehouse space utilization by up to 40% compared to round-bottom packaging, while minimizing the risk of collapse.
High Filling Efficiency
The external valve design is compatible with automatic filling machines.
Bags are filled by simple valve insertion and self-seal automatically after filling, eliminating the need for manual sealing.
Compared with traditional woven bags, handling time per bag is reduced by over 60%.
Environmental Compliance
The kraft paper layers are recyclable, and the PE film uses a low-impact formulation.
The bag complies with EU REACH environmental standards, making it suitable for export-oriented businesses.
