EN
Factory Custom Full PTFE Filter Bag Various Diameter Length Seamless Sewing Dust Collector Bag
Our full PTFE needle felt filter bags are manufactured from 100% pure polytetrafluoroethylene staple fiber, featuring unparalleled chemical inertness and extreme high temperature resistance. It stably operates continuously at 240℃ and withstands instantaneous temperature spikes up to 280℃, without thermal deformation or fiber degradation. Unlike PPS, Nomex and polyester media, PTFE completely resists all strong acids, alkalis, oxidizing flue gas and high-humidity condensate, with zero hydrolysis performance, perfectly adapting to the harshest waste incineration and chemical flue gas working conditions. Optional bidirectional stretched ePTFE microporous membrane realizes absolute surface filtration, intercepting 0.08μm ultra-fine PM2.5 particles with efficiency up to 99.999%, achieving ultra-low flue gas emission below 3mg/Nm³. The ultra-smooth non-stick surface brings excellent dust release performance, effectively avoiding dust embedding and bag blinding, maintaining stable low air resistance for long-term operation and reducing fan energy consumption. Inherent self-extinguishing flame retardant property eliminates fire risks from high-temperature sparks. With super long service life (3~5 times longer than PPS filter bags), it drastically cuts equipment downtime and spare parts replacement costs for industrial baghouses.
Description
Product Standard Parameters
| Parameter Item | Technical Specification |
|---|---|
| Material | 100% Pure PTFE (Polytetrafluoroethylene) Needle Felt, optional ePTFE microporous membrane lamination |
| Fabric Weight | 750g/㎡ / 830g/㎡ (customizable) |
| Filtration Precision | 0.08μm ~ 0.3μm |
| Filtration Efficiency | 99.98% ~ 99.999% |
| Continuous Working Temp | ≤240℃ |
| Instant Peak Temp | 260℃ ~ 280℃ |
| Chemical Resistance | Full inert, resistant to all strong acid, strong alkali, oxidant, pH 0~14 |
| Core Performance | Zero hydrolysis, non-flammable, self-extinguishing, low surface friction, anti-stick dust |
| Air Permeability | 1.8~3.6 L/m²/s (200Pa) |
| Application Scenarios | Municipal waste incineration, hazardous waste disposal, chemical plant, metallurgy, high-corrosion flue gas treatment |
| Post-treatment | Singeing, calendering, seamless hot melt sewing, PTFE membrane composite |
| Customization Service | Custom diameter, length, bag mouth structure, membrane thickness, sewing process |
Core Product Selling Points
1. Ultimate Chemical Inertness, Full Anti-corrosion for All Complex Flue Gas
PTFE fiber is chemically inert to all corrosive media within pH 0~14, completely resistant to HCl, HF, sulfur oxide, heavy metal vapor and strong oxidants that easily damage PPS and Nomex filter bags. Zero hydrolysis performance ensures stable structure under long-term high-temperature & high-humidity flue gas environment.
2. Super High Temperature Resistance, Stable Performance Under Extreme Thermal Condition
Supports 240℃ long-term continuous operation, instantaneous temperature resistance up to 280℃, no shrinkage, embrittlement or strength attenuation. Ideal for waste incineration, metallurgical kiln and high-temperature chemical flue gas filtration scenarios.
3. Optional ePTFE Membrane Surface Filtration, 99.999% Ultra-high Filtration Efficiency
The laminated ePTFE microporous membrane forms dense surface filter layer, intercepts all 0.08μm ultra-fine dust and PM2.5 particles, no fine dust penetration, exhaust emission far below national environmental standard to realize ultra-low emission.
4. Ultra-smooth Non-stick Surface, Excellent Pulse Dust Cleaning, No Bag Clogging
Extremely low surface friction coefficient prevents dust from embedding into fiber gaps. Dust cake fully falls off during pulse jet cleaning, pressure drop keeps stable permanently, no frequent high resistance caused by blind bag.
5. Inherent Self-extinguishing Flame Retardant, Eliminate High-temperature Spark Safety Hazards
PTFE has ultra-high limit oxygen index, non-combustible and self-extinguishing after leaving fire source, effectively block ignition risks from incineration flue gas sparks, improving overall safety of dust removal system.
6. Extra Long Service Life, Greatly Reduce Workshop Operation & Maintenance Cost
Strong anti-aging and wear-resistant property, service life reaches 3~5 times of ordinary PPS filter bags. Less frequent bag replacement cuts production downtime, spare parts procurement and labor maintenance costs comprehensively.
Incomplete Dust Removal Q&A
Q1 High-corrosion waste incineration flue gas makes PPS filter bags brittle and perforated with short service life?
PPS fiber is vulnerable to chlorine-containing oxidizing flue gas, which will lead to rapid fiber embrittlement and breakage within 6~12 months. Our 100% PTFE filter bag owns full chemical inertness, no reaction with HCl, HF and all acidic condensate, maintaining intact fiber structure under long-term corrosive working conditions. Its service life is 3~5 times longer than PPS bags, completely solving frequent bag replacement and dust leakage problems caused by corrosion damage.
Q2 High temperature & high humidity flue gas leads to filter bag hydrolysis, blinding and rising differential pressure?
Polyester, Nomex and PPS filter media all have different degrees of hydrolysis risk under hot and humid acidic environment. Our pure PTFE material achieves absolute zero hydrolysis, fiber will not swell or pulverize in saturated moisture flue gas. Matched with smooth PTFE membrane surface, dust cannot stick to fabric, stable low pressure drop operation all year round.
Q3 Incinerator exhaust emits white smoke, PM2.5 ultra-fine dust exceeds environmental standard, incomplete dust removal?
Ordinary deep-felt filter bags rely on inner fiber interception, submicron fine dust easily penetrates fabric gaps to cause smoke emission. Our ePTFE membrane laminated PTFE filter bag adopts surface filtration technology, all fine particles are blocked on the membrane surface, filtration efficiency up to 99.999%, outlet dust concentration below 3mg/Nm³ to meet strict ultra-low emission regulations.
Q4 High temperature sparks in incineration kiln bring fire risk to conventional filter bags?
Our full PTFE filter bag has inherent non-flammable and self-extinguishing performance, high limit oxygen index will not continue burning after leaving fire source. It effectively isolates spark ignition risks, simultaneously maintains ultra-high filtration precision, balancing equipment safety and dust removal compliance.
Q5 Filter bags stick heavy sticky dust, pulse cleaning is incomplete, air volume declines rapidly?
Conventional filter felt has rough surface, viscous dust embeds into fiber inner layer and cannot be cleaned completely. PTFE material features ultra-low surface friction coefficient, dust cake slides off thoroughly during pulse blowing without residual embedding. Long-term stable air permeability avoids air volume attenuation and production limitation.
Q6 Harsh chemical working conditions need frequent filter bag replacement, leading to high long-term operation cost?
Our pure PTFE filter bag integrates ultra-high temperature resistance, full corrosion resistance and zero hydrolysis advantages, suitable for all severe flue gas environments. Its long service life greatly reduces purchasing quantity, shutdown replacement frequency and waste bag disposal labor, comprehensively cutting overall workshop operating cost in long run.
