Needle-Punched Depth Filtration at 260°C for Heavy Industrial Baghouses

Skytech Ultrafab Non-Woven Fibre Glass Filter Bags utilise needle-punched E-glass fibre batting for deep-bed particle capture at continuous temperatures up to 260°C. Unlike woven glass bags, needle-punched non-woven bags offer three-dimensional depth filtration, greater particle loading capacity, and the ability to handle hygroscopic and sticky dusts more effectively. Used in reverse-air and low-energy pulse baghouses in power generation, cement, and aluminium industries.

What Are Non-Woven Fibre Glass Filter Bags?

Non-woven fibre glass filter bags are produced by needle-punching E-glass fibres into a batting that is laminated to a woven glass scrim for structural support. The resulting needle-felt structure provides depth filtration — particles are captured throughout the full thickness of the felt, rather than only on the surface as in woven bags. This improves dirt-holding capacity and makes the bags more tolerant of hygroscopic and sticky dusts that would blind a woven surface filter. A PTFE scrim or membrane is typically applied to the filtration surface to improve cake release.

Features and Benefits

• Depth Filtration at 260°C: Needle-punched E-glass batting provides three-dimensional depth filtration at up to 260°C — combining the thermal performance of woven glass with the dirt-holding advantage of felt construction
• Higher Dirt-Holding Capacity: Depth filtration structure captures particles throughout the felt thickness — providing higher solids loading between cleaning cycles than equivalent woven glass bags
• Better Sticky Dust Handling: Depth structure and PTFE surface treatment are more tolerant of hygroscopic, cohesive, and sticky dusts that would rapidly blind a smooth woven glass surface
• Woven Glass Scrim Reinforcement: Integrated woven glass scrim provides structural support for the needle-felt batting — maintaining bag integrity under the mechanical loads of cleaning cycles
• PTFE Surface Treatment: Standard PTFE finish on the filtration surface reduces adhesion and improves cake release — critical for efficient cleaning in low-energy reverse-air and pulse systems
• Custom Weight and Thickness: Batting weight and felt thickness specified to match the particle loading, cleaning energy, and service temperature of each specific baghouse application

Technical Specifications

Applications

• Coal-Fired Power Plants: Boiler flue gas reverse-air baghouses where the higher dirt-holding capacity of needle-felt glass reduces cleaning cycle frequency and compressed air energy versus woven glass alternatives
• Cement Industry: Kiln bypass and clinker cooler baghouses — non-woven glass handles the combination of high temperature and cohesive kiln dust that challenges woven glass surface filtration
• Aluminium Smelting: Anode baking furnace and pot room ventilation baghouses where fluoride fume and high temperature require glass fibre construction with PTFE treatment
• Ferro-Alloy Furnaces: Electric arc furnace off-gas filtration in ferroalloy production where gas temperatures and chemistry require glass fibre needle-felt construction
• Hazardous Waste Incineration: High-temperature incinerator baghouses where the depth structure provides better resistance to plugging by condensed acid salts than smooth woven glass

Why Choose Skytech Ultrafab for Non-Woven Fiber Glass Filter Bags?

• Needle-Punching Capability: In-house E-glass needle-punching facility — full control over batting weight, scrim integration, and felt thickness for each application specification
• PTFE and ePTFE Finishing: PTFE treatment and ePTFE membrane lamination performed in-house on all non-woven glass bags — consistent surface treatment quality across every production batch
• Weight Optimisation: Application engineers specify the optimal fabric weight to balance filtration efficiency, cleaning response, and service life for your specific baghouse and dust
• Thermal Testing: Bags thermally cycled and tested for dimensional stability before despatch — guaranteeing performance in the high-temperature fluctuation conditions of power and cement baghouses
• Long Service Life: Properly specified non-woven glass bags routinely achieve 3–5 year service intervals in high-temperature power and cement applications — superior ROI versus annual bag replacement