It adopts a multi-layer composite structure, with an anti-corrosion coating on the inner layer, which can resist the erosion of acids, alkalis and solvents, and prevent leakage and reaction. It complies with chemical packaging standards such as REACH and FDA, has no risk of chemical migration, and features moisture resistance, corrosion resistance and anti-static properties. It is suitable for the storage and long-distance transportation of materials such as pigments, fertilizers and chemical auxiliaries.

Based on high-strength multi-layer kraft paper, it can be optionally equipped with a fiber-reinforced layer or PE inner lining, with a load-bearing capacity of 15-50kg, and is resistant to stretching and deformation. Moisture-proof and dust-proof, compatible with automated filling. Two structures are available: valve port (for quick filling) and open with handle (for manual operation). It complies with ISO and CE standards and is suitable for building materials such as tile adhesive, cement, and putty powder.

Made of food-grade certified kraft paper, free of fluorescent agents and harmful additives, with an optional food-grade PE inner lining to enhance moisture resistance. It has passed FDA, BRCGS and other certifications, blocking water, oxygen and odors, with good sealing performance. It can be designed with easy-tear wire or resealable valve ports, and is suitable for food materials such as flour, milk powder and pet feed.