Nomex Needle Felt Filter Cloth

Description

The advantages of aramid/nomex needle filter felt cloth mainly include high temperature resistance, dimensional stability, fire retardant, chemical corrosion resistance and good wear resistance.

• High temperature resistance: Nomex needle-punched felt can be used in various dust collectors within 200℃, can work continuously at a temperature of 180℃, and the instantaneous working temperature can reach 220℃.
• Dimensional stability: At a high temperature of 230℃, the expansion rate of aramid needle-punched felt is only 1%.
• Fire retardant: It starts to decompose and carbonize at 400℃, and the limiting oxygen index (LOI) is 30. It does not spontaneously ignite or support combustion.
• Chemical corrosion resistance: It is not easy to react with chemicals such as acids and alkalis.
• Wear resistance: Nomex needle-punched felt also has good wear resistance and can adapt to various types of high-efficiency and high-intensity filtering work.
• In addition, nomex needle-punched felt also has the advantages of good air permeability, high dust collection efficiency, large dust holding capacity, and long service life.

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Processing and Surface Treatment

Filmedia® uses high-quality aramid fibers as raw materials, adopts international advanced standards, and uses advanced production equipment to manufacture aramid high-temperature resistant needle-punched filter felts. The aramid fiber filter material is combined with the surface layer and the base cloth layer through multiple needle punching, and then after singeing and calendering, the whole is impregnated with PTFE (polytetrafluoroethylene), and then its surface is sintered at high temperature to form a dense protection membrane. Thereby greatly improving the overall performance of the filter material.

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Physical and Chemical Properties of Aramid/Nomex Needle Felt Filter Cloth

Product name	Aramid needle felt 500 g/m²
Product Code	ES-AMD500N
Physical properties
Fiber	Aramid staple fiber
Scrim	Aramid staple yarn
Weight	g/m²	500
Thickness	mm	2.2
Width	m	≤2,2
Finish treatment	Singeing, Calendering, Heat setting
Air permeability	l / m2 / s @200pa	250
Tensile strength	Warp	800
	Weft	900
Tensile elongation	Warp	20
	Weft	30
Temperature
Continuos temperature	C°	204
Instant temperature	C°	240
Chemical Properties
Anti-acid	Good
Anti-alkali	Good
Anti-abrasion	Excellent
Hydrolysis stability	Good

Specifications of Aramid Fiber

Aramid Fiber Specification
Type	A	Color	white
Danier	22dtex	Length	51mm
Quantity	3025.1kgs
Test Items	Units	Test Results
		Max.	Min.	Ave.
Txtre	dtex	2.38	2.33	2.36
Tensile Strength	cN/dtex	3.9	3.7	3.8
Elongation	%	42.23	38.34	39.91
Staple Length	mm	54	48	52
Oil Pick-Up	%	0.62	0.54	0.58
Shrikage at 300℃	%	2.9	1.6	2.2

Application of Aramid/Nomex Needle Felt Filter Cloth

• High-temperature flue gas filtration: It is used in industrial flue gas treatment systems, especially in industries such as cement production, metallurgical processes, and waste incineration, to filter solid particles in high-temperature flue gas.
• Chemical industry: Due to its good chemical stability and corrosion resistance, aramid fiber is widely used in the filtration process for treating corrosive gases and chemicals in the chemical industry.
• Environmental protection: In the environmental protection field, it is used in industrial waste gas treatment systems to help filter and capture particulate matter and pollutants in industrial waste gas, protect the environment and improve air quality.
• Automotive industry: In the automotive industry, aramid needle felt filter cloth is used in vehicle exhaust treatment systems to help reduce emissions and meet emission standards.