Sintered Metal Fiber, Stainless Steel Sintered Fiber Felt

PRODUCT DESCRIPTION

Sintered Metal Fiber

Metal sintered fiber is a high-performance porous metal filter material. It is formed by consolidating disordered stacked metal fibers (rather than woven metal wire mesh) at high temperature through a special process. Its structure is similar to "felt", but it is made of metal and has been strengthened, so it has unique physical and chemical properties. It is widely used in industrial fields such as precision filtration, fluid distribution, sound absorption and shock absorption, flame retardancy and explosion-proof in harsh environments.

Sintered Metal Fiber

Sintered Metal Fiber Sintered Metal Fiber Sintered Metal Fiber

Metal sintered fiber uses extremely fine metal fibers (usually micron-level in diameter, such as 2μm~100μm), and the material is mostly stainless steel (304, 316L, etc.), and high-temperature and corrosion-resistant materials such as nickel-based alloys and titanium alloys can also be used. Non-woven disordered short fibers are made by melt drawing, cutting or chemical methods.

Process sintering in Metal sintered fiber

Layering: The metal fibers are evenly stacked according to the designed thickness (the fiber thickness can be controlled in layers to form gradient pores).

High temperature sintering: heating to a temperature close to the melting point of the metal (lower than the melting point) in a vacuum or protective atmosphere, so that the fiber contact points diffuse and fuse with each other to form a strong three-dimensional network skeleton structure.

Result: The fiber intersections are sintered into one, maintaining a high porosity (usually 60%~90%) and high strength integrity.

Filtration Mircon	Bubble point pressure Pa		Breathability L/(min.dm2)		Porosity %		Pollutant carrying capacity mg/cm2		Thickness Mm		breaking strength Mpa
	Nominal	deviation	Nominal	deviation	Nominal	deviation	Nominal	deviation	Nominal	deviation	Nominal	deviation
5	7000		30		75		2		0.3		32
10	3500		100		75		4		0.3		36
15	2300		150		75		6		0.35		32
20	1700		250		75		10		0.45		23
25	1400	+-10%	300	+-20%	75	+-10%	15	+-20%	0.6	+-10%	23	+-20%
30	1100		400		75		15		0.6		20
40	900		600		75		20		0.6		23
60	800		1000		75		30		0.6		26
80	700		1300		75		40		0.6		28

Core performance characteristics of metal sintered fiber

Features	Description
High porosity	The three-dimensional disordered structure forms complex interconnected channels with a porosity of more than 80%, and the fluid has low resistance to passage.
Gradient precision design	Gradient filtration from coarse to fine can be achieved by laying fibers of different thicknesses in layers, with extremely high dirt holding capacity.
Large dirt holding capacity	Deep filtration mechanism, pollutants are trapped inside the felt body rather than on the surface, and the dust holding capacity far exceeds that of surface filter materials such as sintered mesh.
Excellent temperature resistance	All-metal structure, temperature resistance can reach 500~600°C (such as 316L), and can withstand higher temperatures instantly.
High mechanical strength	After sintering, the fibers are fused into a whole, with strong pressure and impact resistance, and are not easy to deform (especially suitable for high-pressure pulse backwashing).
Excellent corrosion resistance	Optional corrosion-resistant alloys (such as Hastelloy, titanium felt), resistant to corrosive media such as strong acids, strong alkalis, and organic solvents.
Washable and regenerable	Supports high-pressure backwashing, ultrasonic, chemical cleaning, etc., with long repeated service life.
No shedding	No binder, the fiber is firmly fused, no particles or fibers fall off, meeting high cleanliness requirements (such as semiconductors, medicine).

Comparison between Metal sintered fiber and metal sintered mesh

Comparison items	Metal sintered fiber	Metal sintered mesh
Basic materials	Disordered short fibers	Multi-layer woven metal wire mesh
Structural features	Non-woven three-dimensional random network with tortuous pores	Regularly stacked wire mesh with relatively orderly pores
Filtration mechanism	Mainly depth filtration (high dirt holding capacity)	Mainly surface filtration (high-precision interception)
Precision control	Nominal accuracy (wide range, such as 1~100μm)	Absolute accuracy (strictly controlled, such as 5μm/10μm, etc.)
Dirt holding capacity	Very high	low, relying on surface interception
Anti-clogging	Strong (gradient design delays clogging)	Weak (filter cake is easily formed on the surface)
Applicable working conditions	High pollution, large particle impact environment	High precision, low impurity load environment

Typical application scenarios of Metal sintered fiber

1. High temperature and high pressure precision filtration

- Petrochemical/Chemical Industry: Filtration of catalytic cracking oil slurry, purification of high-temperature gas, filtration of polymer melt (such as polyester and nylon melt).

- Energy: filtration of gas turbine intake air, filtration of nuclear power coolant.

2. Pretreatment of highly polluted fluids

- Metallurgy: filtration of continuous casting cooling water and rolling emulsion.

- Environmental protection: dust removal of flue gas from garbage incineration, deep treatment of sewage.

3. Extremely corrosive environment

- Electroplating/pickling: circulation filtration of strong acid (sulfuric acid, hydrochloric acid) to recover precious metal particles.

- Lithium battery: precise filtration of electrolyte (using titanium sintered felt to resist hydrofluoric acid corrosion).

4. Functional application

- Noise reduction: as a resistive silencer material, used in compressor and engine exhaust systems.

- Flame retardant and explosion-proof: flame arrester core layer, blocking flame propagation (pores < flame quenching distance).

- Fuel cell: gas diffusion layer (GDL), uniform distribution of reaction gas.

Metal sintered fiber is a rigid porous body formed by high-temperature sintering of metal fibers. It has the high dirt holding capacity of deep filtration, the heat and corrosion resistance of metal materials, and the long life characteristics of repeated regeneration.

> Applicable scenarios: harsh working conditions with high pollution, high temperature, strong corrosion, and deep filtration.

> Inapplicable scenarios: ultra-clean fluids that require absolute filtration accuracy (such as chip photolithography liquid) and extremely low initial pressure drop.

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