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| Customization: | Available |
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| Material: | Polyester |
| Medium Material: | Microfiber |
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Polyester Needle-Punched Felt Filter Bags are one of the most widely used, versatile, and cost-effective filter media in dust collection systems. The name defines both the material ("Polyester," a type of polyester fiber) and the manufacturing process ("Needle-Punched Felt," where barbed needles interlock fibers into a robust non-woven fabric).
This product operates on the principle of depth filtration, where dust particles are captured within the intricate fiber matrix of the felt.
Working Principle:
Unlike traditional deep filtration media (where dust enters the interior), membrane filter bags use a surface filtration mechanism. Dust is trapped on the smooth surface of the membrane and cannot enter the interior of the filter fibers, forming a thin layer of "dust cake". This layer of dust cake is very easy to peel off as a whole during dust cleaning.
The common specifications and sizes of dust removal bags generally include the following sizes: diameter: 120, 130, 133, 155, 180, 200, 250, 292, 300mm, etc; The lengths include: 1000, 1500, 2000, 2400, 25000, 2480, 2800, 3000, 3200, 3600, 4000, 4400, 5000, 6000, 8000mm, etc
The commonly used specifications for circular cloth bags include Φ 133 * 1000, Φ 133 * 1500, Φ 133 * 2000, Φ 133 * 2500, etc., with Φ 133 * 2000 being the most commonly used.
If you need other sizes
| Parameter | Typical Value | Remarks |
| Fabric Weight | 450 - 550 g/m² | Can be adjusted based on specific application needs. |
| Fabric Thickness | 1.6 - 2.0 mm | |
| Air Permeability | 80 - 150 L/m²·s | Relatively high permeability leads to lower initial operating resistance. |
| Continuous Operating Temperature | ≤ 130 °C | A critical limitation. Must be strictly controlled to prevent damage. |
| Peak Operating Temperature | ≤ 150 °C | Short-term exposure causes strength loss; prolonged exposure leads to hardening and embrittlement. |
| Acid Resistance | Good | Suitable for acidic environments at normal temperatures. |
| Alkali Resistance | Good | Resistance to alkali is better than its resistance to acid. |
| Post-Treatment Options | Singeing, Calendering, Heat Setting | Singeing/Calendering: Creates a smooth surface for improved dust release. Heat Setting: Stabilizes dimensions. |
Polyester Needle Felt is the go-to solution for numerous industries, including:
Cement Industry: Raw mill, cement mill, packing plant, silo top & bottom.
Steel & Metallurgy: Sinter plant, blast furnace, material handling & transfer points.
Woodworking: Sanding, particleboard manufacturing, furniture production (wood dust).
Food & Pharmaceutical: Collection of flour, sugar, starch, and powder ingredients.
Chemicals & Plastics: Powder and pellet recovery
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