Sintered Metal Fiber

**Sintered felt is a porous filter material formed by high-temperature sintering process using metal fibers, and is widely used in various industrial filtration scenarios**.

Stainless steel sintered felt can effectively make up for the weakness of metal mesh that is easy to clog and damage, and can make up for the shortcomings of powder filtration products that are fragile and have small flow. It has the characteristics of temperature resistance and pressure resistance that ordinary filter paper and filter cloth cannot match. Therefore, stainless steel metal sintered felt is an ideal high temperature resistant, corrosion resistant and high precision filtration material.


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                                                        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. 

More information about sintered metal fiber, please contact us! sales@dswirecloth.com

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