“Three defenses” have different interpretations in different fields. Among them, Baidu Encyclopedia’s interpretation of “three defenses” refers to “anti-nuclear weapons, anti-biological weapons, and anti-“chemical weapons.” In the electronics industry, “three defenses” refer to ” Anti-mold, anti-moisture, and anti-salt fog”; in the agricultural field, three preventions refer to “drought prevention, flood prevention, and wind prevention”; in industry, three preventions refer to “antifreeze, anti-skid, and anti-poisoning”; in the construction industry, it refers to The “waterproof, fireproof, and shockproof” three-proof tarpaulin is different from the “three-proof” mentioned above. The three-proof tarpaulin mainly refers to the anti-aging, waterproof, and mildew-proof; the five-proof tarpaulin is also in addition to the three-proof It must be fireproof and anti-corrosion. It is required that the water pressure resistance value is ≥2000MM water column, the cold resistance temperature is -20°C, the mildew resistance test is–grade, and the flame retardant grade is above V-2. This is the main three-proof tarpaulin and non-proof tarpaulin Several requirements. Due to the high quality requirements for three-proof tarpaulin and five-proof tarpaulin, PVC material is mainly used, and users can also choose the grade of tarpaulin according to their needs. The following is the current PVC three-proof tarpaulin Main application areas:
1. Freight tarpaulins for cars and trains;
2. It is used to cover the stacks in the warehouse;
3. Build temporary granaries and cover all kinds of crops in the open air;
4. Temporary sheds on various construction sites such as construction sites, electric power construction sites, etc.;
5. Outer sheath of various machinery and equipment;
