FIBCs, flexible pp big bag, bulk bag, jumbo bag for builder  has the loading weight from 500kg to 3000kg with safety factor from 3:1 to 6:1. The features are light, soft, high strength, acid and alkali resistant, moisture resistant, Anti-aging and leaking convenient and practical. They can be widely used in mineral, chemical , food, starch, feed, cement, coal, powdered or granular materials packaging.