GUANLIN water & oil repellent anti-static filter bags, 130°C temperature resistance, for woodworking, flour mill, cement and coal powder dust collection.

GUANLIN triple-defense filter bags are built for the hardest room-temperature duties: humid gas streams that blind ordinary polyester bags, oily or sticky dust that never releases from the felt, and combustible dust that needs static dissipation. A fluorocarbon molecular coating is impregnated into the needle felt rather than sprayed on top, and a conductive grid is woven through the media to bleed off static charge.

Why Choose GUANLIN Triple-Defense Filter Bags

1. Fluorocarbon molecular coating — impregnated into the fibre structure, not a surface spray, so water and oil repellency survives repeated pulse cleaning.
2. Anti-static conductive grid — continuous conductive yarn dissipates static charge and lowers the risk of dust explosion in wood, coal and chemical powder applications.
3. No more bag blinding — the treated surface stops moisture and oil from wetting the felt, keeping pressure drop stable across the whole cleaning cycle.
4. Stable 130°C service — polyester needle felt base media for continuous 130°C duty with a 150°C short-term peak.
5. ≥99.9% filtration efficiency — dense needle-punched structure captures fine particulate down to 1 μm.
6. Fast dust release — low surface energy finish allows the dust cake to fall away cleanly and completely.
7. Custom sizing — Ø115–200 mm × 1000–6000 mm to your drawing, matched to existing cages.
8. Matched cages available — bags and treated support cages supplied as a set to avoid galvanic and abrasion issues.

Application Scenarios

Woodworking and furniture manufacturing
Sanding, sawing and edge-banding lines produce fine wood flour with high moisture content and a real explosion risk. The anti-static grid dissipates charge while the oil repellent finish stops resin and moisture from blinding the felt, keeping extraction airflow stable through the shift.

Flour milling and food processing
Grain dust combines high humidity with a low minimum ignition energy. Triple-defense bags deliver both the anti-static property and the moisture resistance that standard polyester bags lack, and the smooth finish supports easier cleaning between production campaigns.

Cement, concrete batching and silo tops
Alkaline clinker dust plus outdoor humidity causes conventional bags to harden and crack. The fluorocarbon impregnation keeps the felt flexible and prevents cement dust from cementing into the fibre.

Coal and carbon powder handling
Coal dust is both abrasive and explosible. Conductive grid construction with proper grounding removes static accumulation, while the tough 500 g/m² base media resists the abrasion of high dust loading.

Chemical and powder processing
Oily or tacky powders that stick to untreated felt release cleanly from the triple-defense surface, reducing cleaning frequency and compressed air consumption.

Foundry and shot blast extraction
Metallic fines combined with oil mist from coated sand are handled by the oil repellent finish, while the conductive grid protects against static build-up in the ducting.

Applicable Working Conditions

• Continuous gas temperature ≤130°C (266°F), short-term peak ≤150°C (302°F)
• Humid, oily or sticky dust that blinds standard polyester felt
• Combustible dust requiring static dissipation
• Pulse jet, shaking or reverse-air cleaning

Product Specifications

Packaging & Logistics

• Inner: individual polybag with moisture barrier
• Outer: 5-ply export carton or woven bag, 50–100 pcs per carton
• EXW / FOB Shenzhen or Guangzhou / CIF

FAQ

Q1. What does triple-defense mean?
Water repellent, oil repellent and anti-static in one media: a fluorocarbon impregnation plus a conductive grid in the needle felt.

Q2. Why do my current bags blind in humid weather?
Untreated polyester wets out and the dust cake turns into a mud layer. The fluorocarbon finish prevents wetting and keeps the cake dry and releasable.

Q3. Is it suitable for combustible dust?
Yes, the conductive grid dissipates static when the cage, tubesheet and baghouse are properly grounded and bonded.

Q4. Does the coating wash off?
No. The fluorocarbon is impregnated into the fibre structure rather than applied as a surface spray, so it survives repeated pulse cleaning and wash-down.

Q5. What is the maximum temperature?
Continuous 130°C (266°F), short-term peak 150°C (302°F). Above that choose PPS, aramid or fiberglass.

Q6. Can you match our existing bag dimensions?
Yes, provide the cage diameter, bag length and top construction, and we produce to your drawing.

Q7. What is the MOQ and lead time?
MOQ 10 pcs, 7–15 days for standard sizes.

Q8. Do you supply the matching cages?
Yes, bags and support cages can be supplied as a matched set.

• Media: polyester needle felt with conductive grid, 500 g/m²
• Treatment: fluorocarbon water & oil repellent, anti-static
• Temperature: 130°C continuous / 150°C peak
• Efficiency: ≥99.9% at ≥1 μm
• Sizes: Ø115–200 mm × 1000–6000 mm
• MOQ: 10 pcs, 7–15 days