Anti-Static Needle Punched Felt Filter Bag
Anti-static needle punched felt filter bags from LYH fit coal handling, biomass power, woodworking, flour milling, plastics, pharmaceuticals, and any dust collection application where combustible or explosive dust creates static-discharge ignition risk. Buyers choose anti-static filter bags when they need certified static dissipation, surface resistance below 10⁹ Ω·cm, and reliable compliance with ATEX, NFPA, and other combustible-dust safety standards.
We supply anti-static filter bags from China built on multiple base media — PET (polyester), PP (polypropylene), PPS, P84, aramid, and PTFE — with conductive carbon fiber, stainless-steel filament, or conductive scrim integration. If your project requires specific base media, surface resistance target, or grounding configuration to meet your facility’s combustible-dust safety code, we can review the RFQ and pair the right anti-static construction to your dust collector.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Base Material | PET / PP / PPS / P84 / Aramid / PTFE (customer-specified) |
| Conductive Element | Carbon fiber blend, stainless-steel filament, or conductive woven scrim |
| Surface Resistance | 10³–10⁸ Ω·cm (typical), tunable to specification |
| Volume Resistance | ≤ 10⁹ Ω·cm |
| Continuous Operating Temperature | Determined by base media (90–260 °C — see base media specifications) |
| Standard Fabric Weight | 500 / 550 / 600 / 650 GSM (customizable) |
| Air Permeability | 12–18 m³/m²/min @ 200 Pa |
| Tensile Strength (Warp / Weft) | ≥ 1,000 N / 5×20 cm |
| Filtration Efficiency | ≥ 99.9% (with PTFE membrane: ≥ 99.99%) |
| Compliance Standards | ATEX, NFPA 654, BS EN 1149, GB/T 12703 (testable on request) |
Material Properties
Base Media Performance Preserved — The conductive elements add static dissipation without compromising the base media’s mechanical, thermal, or chemical performance. An anti-static PPS bag retains PPS’s full 190 °C temperature rating and acid resistance; an anti-static aramid bag retains aramid’s full 204 °C rating and abrasion strength.
Multiple Construction Methods —
- Carbon fiber blend — fine carbon fibers (typically 1–3% by weight) blended into the felt batt, distributing conductivity uniformly throughout the bag thickness. The most cost-effective method for general combustible dust.
- Stainless-steel filament — fine stainless filaments woven into the scrim, providing higher conductivity and durability under harsh conditions. Preferred for high-temperature or abrasive applications.
- Conductive woven scrim — conductive yarns woven into the support scrim, providing structural conductivity throughout the bag’s service life.
Stable Performance Throughout Service Life — Unlike surface-applied conductive coatings (which can wear off), the integrated conductive network in LYH anti-static filter bags maintains its performance over years of pulse-jet cleaning and dust loading.
Compliance with Combustible-Dust Safety Standards — LYH anti-static filter bags are designed to meet ATEX Directive 2014/34/EU, NFPA 654, BS EN 1149-1/-3, and equivalent standards for static-control filter media in combustible-dust environments. Test reports available on request.
Limitations to Note — Anti-static performance requires proper grounding of both the filter bag and the dust collector cage and tube sheet. Without continuous grounding to earth, static charge cannot dissipate regardless of the bag’s conductivity. Anti-static treatment alone does not eliminate explosion risk — it must be combined with proper baghouse design (explosion vents, isolation, suppression) per the applicable safety code.
Available Base Media & Surface Treatments
Anti-static treatment can be combined with virtually any base media and surface treatment. Common configurations:
| Base Media | Recommended For |
|---|---|
| Anti-Static Polyester (PET) | Coal handling, woodworking, flour milling, sugar handling, plastics processing, pharmaceutical powders — the most common anti-static configuration |
| Anti-Static Polypropylene (PP) | Chemical powder handling, electroplating residues, low-temperature combustible dust in wet or acidic streams |
| Anti-Static PPS | Biomass power, MSW incineration, coal-fired power plants where high-temperature acid flue gas contains combustible carbon |
| Anti-Static P84 | Premium biomass and waste-to-energy applications combining fine-particle capture with combustible dust safety |
| Anti-Static Aramid (Nomex) | Foundries, metal grinding, EAF secondary dedusting — high-temperature dry hot gas with metal dust ignition risk |
| Anti-Static PTFE | Hazardous waste incineration, halogen-rich combustible dust, ultra-low emission compliance with explosion safety |
Available surface treatments can be combined with any anti-static base media: singeing, calendering / glazing, heat setting, PTFE membrane lamination, water & oil repellent.
Bag Construction
- Top Constructions — Snap band, flange top, ring top, soft cuff, raw edge, strap top — all metal components properly bonded for grounding continuity
- Bottom Constructions — Disc bottom, flat bottom, reinforced double-bottom, wear-strip bottom
- Sewing — 3-needle chain stitch with conductive thread (where required for full static-dissipation continuity); PTFE or polyester thread for high-temperature anti-static base media
- Reinforcement — Optional wear strips and double-bottom reinforcement; all reinforcement maintains grounding continuity
- Grounding Tab — Available on request for direct connection to the dust collector grounding system
Standard Sizes & Customization
| Dimension | Range |
|---|---|
| Diameter | Φ100 / 120 / 125 / 130 / 150 / 160 / 180 / 250 mm (or custom) |
| Length | 1,000 – 8,000 mm (custom lengths available) |
| Tolerance | Diameter ± 2 mm, Length ± 5 mm |
Non-standard sizes, special top/bottom configurations, and OEM patterns produced from your drawings or sample bag.
Industry Applications
- Coal Handling & Coal-Fired Power — coal pulverizing, transfer points, ash handling, fly-ash silos — coal dust is highly combustible and a major explosion risk
- Biomass Power Generation — wood, bagasse, agricultural residue handling and combustion
- Woodworking & Furniture Manufacturing — sawdust, sander dust, MDF dust — leading explosion risk in the wood industry
- Flour Milling & Sugar Handling — flour, sugar, starch, food powder — Class II combustible dust per NFPA classification
- Plastics & Rubber Manufacturing — plastic powder, rubber compound, pelletizing
- Pharmaceutical Manufacturing — APIs, fine pharmaceutical powders with explosion risk
- Metalworking & Foundries — aluminum, magnesium, titanium, iron grinding dust — metal dust explosion is the most severe class
- Chemical Processing — combustible chemical powders, organic intermediates
- Waste-to-Energy & MSW Incineration — refuse-derived fuel handling, ash systems
- Mining & Mineral Processing — coal preparation, sulfide ore handling, combustible mineral dust
Why Choose LYH Anti-Static Filter Bags
- Multiple base media support — anti-static configurations available on PET, PP, PPS, P84, aramid, and PTFE base media
- Premium conductive components — carbon fiber and stainless-steel filaments sourced from leading global producers
- Tunable surface resistance — conductive content adjusted to meet specific compliance targets (10³–10⁸ Ω·cm range)
- Strict QC on fabric weight, surface resistance, volume resistance, conductive distribution uniformity
- Compliance testing — surface resistance test reports per BS EN 1149 / NFPA 654 available on request
- Full customization — any size, any base media, any treatment combination, any grounding configuration
- Engineering support — application engineers help select the right conductive method and base media for your dust class and safety code
- Fast lead time — standard sizes ship in 10–20 days
- Reliable logistics — individually wrapped, ring-up packing, sea / air / courier shipment worldwide
FAQ
Q1: When are anti-static filter bags required? Anti-static filter bags are required whenever the collected dust is combustible or explosive — including coal, biomass, wood, flour, sugar, starch, plastics, fine pharmaceuticals, sulfur, aluminum, magnesium, and most organic powders. Standard non-conductive filter bags can accumulate static charge during pulse-jet cleaning, creating ignition risk that may trigger dust explosion. National safety codes (ATEX in Europe, NFPA 654 in the US, GB/T 12703 in China) mandate anti-static media in these applications.
Q2: What surface resistance is required for combustible dust? The international standard is surface resistance ≤ 10⁹ Ω·cm, with most safety codes (ATEX, NFPA 654) requiring this threshold. LYH anti-static filter bags routinely achieve 10³–10⁸ Ω·cm, providing safety margin below the standard. The exact target depends on the dust class and the applicable code in your jurisdiction.
Q3: Carbon fiber vs stainless-steel filament — which should I choose? Carbon fiber blend is more cost-effective and provides uniform conductivity through the felt thickness; it’s the standard choice for general combustible dust at moderate temperatures (≤ 200 °C). Stainless-steel filament offers higher conductivity, longer service life under abrasive conditions, and better high-temperature stability; it’s preferred for foundries, metal grinding, biomass at high temperature, and any application above 200 °C. We recommend stainless-steel filament for premium applications and carbon fiber for cost-sensitive standard applications.
Q4: Does anti-static treatment affect filter bag performance? No. The conductive elements add static dissipation without compromising the base media’s mechanical, thermal, or chemical properties. An anti-static PPS bag retains PPS’s full 190 °C temperature rating; an anti-static aramid bag retains aramid’s full strength. Filtration efficiency, air permeability, and service life are equivalent to the same base media in non-conductive form.
Q5: Is anti-static treatment alone enough to prevent dust explosions? No. Anti-static filter bags are one essential layer of dust-explosion safety, but they must be combined with: (1) proper grounding of the entire dust collection system to earth, (2) explosion vents or suppression systems per the applicable code, (3) isolation devices to prevent flame propagation, (4) proper baghouse design per NFPA 68/69 or equivalent. Always work with a combustible-dust safety specialist to ensure full compliance.
Q6: Can anti-static be combined with other surface treatments? Yes. Anti-static treatment can be combined with all standard surface treatments: PTFE membrane lamination (for ultra-low emission with explosion safety), water & oil repellent (for sticky combustible dust), singeing, calendering, and heat setting. The most common premium configuration is anti-static PTFE-membrane PPS for coal-fired power and waste-to-energy applications.
Q7: Do you provide test reports for anti-static performance? Yes. Surface resistance test reports per BS EN 1149-1/-3 and equivalent standards are available on request. Reports document surface resistance, volume resistance, and compliance with the specified standard. Some applications require third-party certification (TÜV, SGS) — we can coordinate with major testing bodies on request.
Q8: What information do I need to provide for a quote? (1) bag dimensions, (2) top/bottom construction, (3) operating temperature & humidity, (4) dust type and combustibility class (e.g., NFPA Class II flour dust), (5) preferred base media (PET, PP, PPS, etc.), (6) target surface resistance (if specified by your safety code), (7) emission requirement, (8) quantity. A drawing or sample bag is even better.
Our Partner
