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What are the filtration accuracies of polypropylene filter cloths?
2026-02-01
Common filtration accuracy (micron level)
Coarse filtration: 100–200 μm
High throughput, suitable for large particles, tailings, coal slime, and coarse sludge.
Medium filter: 50–100 μm
General-purpose, for chemical slurries, general sludge, and mineral filtration.
Fine filtration: 20–50 μm
Fine powder, pigments, titanium dioxide, starch, fermentation broth.
Ultra-fine filtration: 5–20 μm
Fine chemicals, fine crystals, and feed liquids requiring high clarity.
The impact of structure on accuracy
Polypropylene staple fiber filter cloth: High precision, prone to clogging, suitable for fine particles and precision filtration.
Polypropylene filament/monofilament filter cloth: Slightly lower precision, easy cake release, and easy to clean—suitable for sludge and tailings.
Needle-punched polypropylene felt: High precision and large dust-holding capacity, commonly used for dust removal and fine filtration.
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