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Fabric and strength：thickness，gsm，air permeability，breaking strength and elongation.
- Heat resistance：Strength characteristics, elongation, dimensional change rate after 24 hours at high temperature
- Filtration： Filtration efficiency, ash removal period, dust stripping rate and resistance change
- corrosion resistance：acid resistance（60% H2SO4）, alkali resistance（40% NaOH）
- Hydrophobic and oil repellent properties
- Anti-static ，Used in flammable dust
- Flame retardant
