Features of Shift-Proof FIBCS: 1. It can prevent from leakage of powder materials during potting, particularly suitablefor the powder with 200 mesh or above; 2. It can prevent from the pollution of dust and benefit to health of workers; 3. All sutures of bag will be sutured with dust proof cotton belt with gill faller or chain interlock method. It can reach 100% of leakage proof (shown in Fig.) 4. Even if under the state of air-charge and having high pressure,it can be used very convenient; 5. The basic material is made of woven cloth coated weth 0.03~0.05mm thickness. The bag body has the functions of waterproof and leakage resistant. A dozen of ten