NOMEX Metax Needle-Punched Dust Filter Bags

2.2.5 NOMEX Metax Needle-Punched Dust Filter Bags
The NOMEX Metax needle-punched filter bag is a high-temperature filtration material made from aramid fiber (Nomex®) through a needle-punching process.
①Performance Parameters:Temperature resistance: ≤200℃ (short-term exposure: 220℃);
Flame retardancy (limiting oxygen index, LOI ≥29%);Tensile strength ≥800 N/5 cm;Weak acid/alkali resistance (pH 5–9);Filtration efficiency ≥99.9% (capturing 1 μm particles) after PTFE membrane coating.
②Applications:Steel smelting and aluminum electrolysis (requires membrane coating for HF protection) in ≤200℃ environments with oxidizing gases or flammable dust (e.g., coal powder);Explosion-proof scenarios require conductive fibers (resistance ≤10⁸ Ω).
③Prohibitions:Avoid use in strong acids/alkalis (pH <5 or >9), high-humidity conditions (>60%), or NOₓ-containing environments (>100 ppm).