Micro Expanded Metal Manufacturer for Precision Filtration, Electronics & Fine Mesh Applications

 

Engineered micro expanded metal foils and thin sheets for battery current collectors, EMI shielding, precision filtration, and aerospace composites. Manufactured via continuous slit-and-stretch cold forming with strand thicknesses down to 0.03 mm and aperture openings starting from 0.20 mm.

 

 
  • Brass Micro Expanded Metal
    Materials:Brass
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Silver Micro Expanded Metal
    Materials:Silver
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Aluminum Micro Expanded Metal
    Materials:Aluminum
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Nickel Micro Expanded Metal
    Materials:Nickel
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Stainless Steel Micro Expanded Metal
    Materials:Stainless Steel
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Titanium Micro Expanded Metal
    Materials:Titanium
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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  • Copper Micro Expanded Metal
    Materials:Copper
    Specification:Our capability covers SWD×LWD ranging from 0.3mm×0.5mm to 10mm×20mm.Minimum sheet thickness: 0.1 mm, maximum width: 1250 mm.
    Color:Customized...
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Product Types
 

Standard Raised Micro Mesh

Structure: Retains the natural angled strand orientation formed during the expansion process.

Key Characteristics: High 3D surface area, three-dimensional mechanical anchorage, structural rigidity, and enhanced fluid turbulence.

Primary Applications: Battery electrodes, fuel cell diffusion layers, catalyst substrates, and heavy-duty filtration.

Flattened Micro Mesh

Structure: Cold-rolled through precision leveling rolls post-expansion to align strands parallel to the sheet plane.

Key Characteristics: Smooth, uniform thickness surface without raised strand edges; eliminates sharp burrs to protect adjacent delicate membranes or filter media.

Primary Applications: Precision air filters, EMI shielding gasket backing, acoustic covers, speaker grilles, and laminated composite structures.

 

Technical Specifications

 

Parameter

Specifications

Notes

Material Thickness

0.03–0.80 mm (0.0012–0.0315 inches)

Standard tolerance: ±0.005 mm

Strand Width

0.05–1.00 mm (0.0020–0.0394 inches)

Precision feed die control

SWD (Short Way Design)

0.20–3.00 mm (0.0078–0.1181 inches)

Standard and custom tool dies

LWD (Long Way Design)

0.40–6.00 mm (0.0157–0.2362 inches)

Adjustable expansion ratio

Open Area Ratio

25%–85%

Calculated based on specific aperture geometry

Supply Formats

Master coils up to 600 mm wide; continuous slit ribbons down to 10 mm wide; custom cut-to-size flat sheets

Multiple formats available for different processing and installation requirements

 

Material Options

Stainless Steel (304, 304L, 316, 316L)

High corrosion resistance for chemical processing, marine filtration elements, and medical components.

 

Copper and Brass

High electrical and thermal conductivity for grounding layers, EMI shielding, and anti-static applications.

Pure Nickel (Ni200 / Ni201)

High oxidation resistance and chemical stability in alkaline environments for lithium-ion battery current collectors and electrolyzers.

Titanium (Grade 1, Grade 2)

High strength-to-weight ratio and acid corrosion resistance for chlor-alkali electrolysis cells and aerospace structures.

Aluminum (1050, 1100, 3003, 5052)

Lightweight electrical conductivity for acoustic grilles and aircraft lightning strike protection (LSP).

 

 
Surface Finishes and OEM Processing
 
01/

Ultrasonic Degreasing: Multi-stage aqueous cleaning to remove drawing lubricants, oils, and particulate matter for cleanroom and battery assembly lines.

02/

Thermal Annealing: Vacuum or protective atmosphere annealing to relieve internal stresses, restoring ductility for continuous roll bending and deep drawing operations.

03/

Precision Edge Trimming: Slit-to-width coils with deburred edge profiling to prevent tearing during continuous automated unwinding.

04/

Plating and Protective Coatings: Electro-galvanizing, nickel plating, or custom functional coatings upon request.

 

Primary Applications

 
 

Battery and Energy Storage: Anode and cathode current collector grids, solid-state battery substrates, and hydrogen fuel cell gas diffusion layers (GDL).

 
 

EMI and RFI Shielding: Electronic enclosure seam gaskets, shielded display windows, Faraday cages, and flexible cable wraps.

 
 

Precision Industrial Filtration: Fine liquid filters, oil-water separation screens, air intake strainers, and hydraulic fluid filter elements.

 
 

Aerospace Composites: Embedded lightning strike protection (LSP) layers integrated directly into carbon fiber reinforced polymers (CFRP).

 
 

Acoustics and Electronics: Protective dust and moisture grilles for automotive audio systems, mobile devices, and professional studio microphones.

 

 

 
 
Manufacturing Standards and Quality Control

Tooling Maintenance

Carbide micro-dies are serviced with optical profile grinding machinery to keep production burr heights below 0.02 mm (20 microns).

In-Line Optical Inspection:

Automated vision camera systems continuously measure aperture uniformity (SWD and LWD pitch) and flag edge defects during coil winding.

Physical Parameter Testing

Every production batch undergoes lot testing for strand thickness, sheet weight per square meter, open area percentage, and tensile breaking strength.

Traceability and Certification

Shipped with Mill Test Certificates according to EN 10204 3.1 standards, as well as RoHS and REACH compliance reports.

 

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Packaging

According to the chemical and physical properties of the products, we use waterproof, moisture-proof and breakage-proof materials for packaging to avoid product damage during transportation. In addition, we can also provide customized packaging according to customer's specific requirements to meet the special needs of different customers.

 

FAQ

 

 

Q: What is the minimum material thickness available for micro expanded metal?

A: Production starts from metal foil thicknesses as thin as 0.03 mm. Standard thickness tolerance is controlled within +/- 0.005 mm depending on the alloy selected.

Q: How do you limit burrs on flattened micro mesh used in battery production?

A: Our manufacturing process incorporates post-expansion precision multi-roll cold leveling paired with mechanical deburring. Burr height is monitored under optical microscopes to maintain burr profiles below 0.02 mm, preventing membrane or separator punctures.

Q: Can micro expanded metal be supplied in continuous coils for automated assembly lines?

A: Yes. Micro mesh can be supplied in continuous master rolls up to 600 mm wide or narrow slit coils down to 10 mm wide. Tension control during winding prevents twisting, camber, or edge waves during high-speed unwinding.

Q: What is the main difference between expanded metal mesh and woven wire mesh?

A: Micro expanded metal is slit and stretched from a single solid sheet without overlapping wires or welded points. This solid-piece construction provides uniform electrical and thermal conductivity across the entire roll without joint resistance, and strands will not unravel when cut.

Q: What technical parameters are required to receive an OEM quote?

A: Please provide the material grade, foil/sheet thickness, strand width, SWD and LWD dimensions (or target open area percentage), surface state (Standard Raised or Flattened), and supply format (cut sheet dimensions or coil width and length).

Q: Are material test reports provided with international shipments?

A: Yes. Every shipment includes an EN 10204 3.1 Mill Test Certificate covering chemical analysis and mechanical testing, along with a Quality Inspection Report verifying SWD and LWD dimensions, coil weights, and surface cleanliness.

Anping Yilida Metal Wire Mesh Co., Ltd. is one of the most reliable micro expanded metal manufacturers and suppliers in China, also supports customized service. Please feel free to buy bulk high quality micro expanded metal made in China here from our factory.

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