If you’re running a cement plant or a chemicla processing line, these bags handle the fine dust that clogs lesser filters—we’ve seen them hold up through 24 months of near-constant use, though your mileage depends on teh particulate load.
The polyester felt weighs in at 500 g/m² with a thickness of 1.7 mm, and air permeability sits at ≤2.2 L/m²/min (so it’s tight but not choked), tensile strength runs ≥1100 N/5cm in the warp and ≥1500 N/5cm in weft, with elongation capped at 35% and 60% respectively.
They’re singed, calendered, and heat-set, which basically knocks off loose fibers and gives a smooth suface for cake release—continuous temp is 130°C but you can spike to 150°C for short bursts, and while acid and alkali resistance is only medium, abrasion resistnce is excellent, so they’re better than standdard polyester for gritty streams.

: hydrolysis stability is medium, so if your gas stream has high moisture and high heat together, these aren’t your best bet—that’s a limitation we’re upfront about.
Width is 2150 mm, and we usually have stock on the standard sizes, but confirm lead time if you need a custom cut—MOQ is typically 50 units or so, and our company provide COA with each batch (ISO9001:2008 and SGS certified).
Warranty runs 12 months, service life is roughly 24 months in most cases, and they ship folded in cartons—no frills, just the bags.