Product Category

Polyamide (PI/P84) Needle Felts

Using the highest quality fiber materials and world-class needling techniques and equipment, HL Filter manufactures a wide range of Polyamide needle felts with high dust-holding capacity and good air permeability. The PI/P84 media has good chemical resistance, but this is endangered under highly alkaline moisture conditions. There is a limited tendency to oxidation through O2 or NO2 at high temperatures.

Bulk Roll Goods: weight, thickness, density, roll width, and roll length are customized at your request.

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Product Description
Specifications
Application
Ordering Information

High termperature needle punched felt

Non-flammable and thermostable organic fiber

Offers extended bag life in low pH applications

helps reduce differential pressure across the baghouse

Operates in high temperature applications against acid attacks and is resistant to flex abrasion (unlike Fiberglass).

Not recommend for high concentration of alkalis at high temperatures.

Continuous operating temperature 460oF (240°C)

Fiber Materials		PI-Polyimide	PI-Polyimide	PI-Polyimide	Polyimide + Aramid
Scrim		Polyimide scrim	Fiberglass scrim	PTFE Scrim	Polyimide scrim
Standard Finish Options (Special surface treatments available)		Heat Set, Singed, Glazed, PTFE membrane (or PTFE bath)
Weight oz/yd² (g/m²)		14.75-17.70 (500-600)	23.60-26.55 (800-900)	14.75-17.70 (500-600)	550
Thickness Inch (mm)		0.075-0.091 (1.9-2.3)	0.098-0.12 (2.5-3)	0.075-0.091 (1.9-2.3)	(2.3-2.7)
Air Permeability CFM@ ½" W.G125PA (m³/m².min@200PA )		27-33 (13-16)	22-33 (10-16)	6-10 (3-5)
Tensile Strength lb/in (N/5CM)	Warp MD	69 (600)	205 (1800)	69 (600)	>900
Tensile Strength lb/in (N/5CM)	Weft CD	91 (800)	205 (1800)	91 (800)	>1200
Tensile Elongation (%)	Warp MD	≤25	≤10	≤25	<35
Tensile Elongation (%)	Weft CD	≤45	≤10	≤45	<50
Burst Strength(Mpa/min)		2.4-2.55	2.95-3.2	2.4-2.55	2.4-2.55
Thermal Shrinkage (%) at max continuous temp.	Warp MD	≤1	≤1	≤1	≤1
Thermal Shrinkage (%) at max continuous temp.	Weft CD	≤1.5	≤1.5	≤1.5	≤1.5
Max. Operating Temperature ^oF (^oC)	Continuous	465 (240)	465 (240)	465 (240)	465 (240)
Max. Operating Temperature ^oF (^oC)	Surge	500 (260)	500 (260)	500 (260)	500 (260)
The data are based on laboratory conditions. Testing based on specific operating conditions of each installation is recommended.

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Custom OEM Applications

Most common applications include: smelters, dryers, coal-fired boilers, incinerators, kilns, and calciners.

Customized per order

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Polyamide (PI/P84) Needle Felts

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