Copper Expanded Metal Mesh
Pure Copper / Electrolytic Copper Expanded Mesh
Copper Expanded Metal Mesh is a non-woven, non-welded mesh product, made from 99.9% electrolytic pure copper sheet (C11000) through precision slotting and unidirectional/bidirectional stretching. It forms continuous diamond-shaped openings with no waste material and high overall strength. There are two main types: Standard (raised diamond) and Flattened (smooth surface).
Manufacturing Process:
Copper Sheet Cutting → Precision Slotting → Mechanical Stretching → Leveling/Deburring → Surface Treatment (Pickling/Passivation/Tin Plating/Anti-oxidation Coating) → Cutting/Rolling.
Core Material & Specification Parameters
Parameter | Typical Range |
Material Grade | C11000 (99.9% Pure Copper); C10200 ; Brass (C26000 optional) |
Sheet Thickness | 0.05 mm ~ 5 mm; Thickness tolerance: ±0.02 mm (for thin sheets) / ±0.05 mm (for thick sheets) |
Mesh Opening (LWD×SWD) | 0.8×1.5 mm, 1×2 mm, 1.5×3 mm, 2×4 mm, 3×6 mm, 5×10 mm, up to 50×100 mm; Customizable opening shapes (diamond, square, hexagonal) and sizes available upon request |
Sheet Width | 200 mm ~ 1220 mm (standard width); Max 2000 mm available for custom orders (subject to production capacity) |
Open Area | 30% ~ 70% (depending on LWD/SWD, sheet thickness and strand width); Custom open area achievable by adjusting process parameters |
Electrical Conductivity | ≥98% IACS (for C11000); Slightly lower for C10200 and brass grades (≥95% IACS) |
Tensile Strength | ≥200 MPa (for C11000, after stretching); Varies with material grade and sheet thickness |
Types | Standard (Ribbed) Copper Expanded Metal Mesh Flattened Copper Expanded Metal Mesh Micro Cu Expanded Mesh |
Key Properties of Cu expanded mesh
l High Electrical & Thermal Conductivity: Pure copper properties, suitable for grounding, heat dissipation, and electromagnetic shielding
l Excellent Ductility & Formability (Good Extensibility and Easy Processing): Bendable, cuttable, weldable, and stampable, suitable for complex installations
l Corrosion Resistance: Excellent in dry/neutral environments; surface tin plating/passivation treatment is recommended for humid/chemical environments
l No Welds or Joints (No Weld Points / No Joints): The entire structure has a tensile strength higher than that of woven mesh of the same thickness
l Lightweight & Good Ventilation (Lightweight and Breathable): High porosity, low wind resistance, and rapid heat dissipation
Typical Applications of copper expanded mesh:
- Aerospace Lightning Protection: Used as lightning protection mesh for aircraft skins and aerospace components, diverting lightning current and protecting structures via excellent conductivity and strength.
- EMI/RFI Shielding: Applied in electronic enclosures, medical instruments, communication cabinets and military equipment to form effective electromagnetic shielding barriers.
- Heat Exchanger/Heat Sink: Used in power supplies, frequency converters, photovoltaic inverters and industrial equipment to improve heat dissipation efficiency and extend service life.
- Architectural Decoration: Used in building curtain walls, ceilings, partitions, railings and facades, with various surface treatments and mesh patterns for aesthetics, ventilation and light transmission.
- Filtration & Separation: Serves as filter screens in chemical, electroplating, water treatment and food processing, with customizable openings for different precision needs.
- Electroplating Racks: Used as electroplating racks/fixtures, ensuring uniform electroplating and better product quality with good conductivity and acid-alkali resistance.
- Battery Grids: Acts as the skeleton for lead-acid and lithium battery plates, enhancing performance and cycle life with excellent conductivity and structural support.
Selection & Tips when ordering copper diamond mesh
l Priority should be given to clear purposes:
Thin and high-density copper expanded mesh (1×2mm, 0.1-0.3mm thick) for lightning protection/shielding.
Thick, large-opening mesh (3×6mm+ opening, 1mm+ thickness) for load-bearing, decoration or filtration
l Differentiate Standard (raised diamond) and Flattened (smooth) types:
Standard for ventilation/heat dissipation; Flattened for fitting, welding or spraying.
l International orders are recommended to use LWD（Long Way of Diamond）、SWD（Short Way of Diamond）、Strand Width、Thickness.
Advantages Over Other Meshes
Feature | Copper Expanded Metal | Woven Copper Mesh | Perforated Copper Sheet |
Structure | Rigid, one-piece construction. | Flexible, can unravel if cut. | Rigid, one-piece construction. |
Strength | Very high strength-to-weight ratio. | Moderate strength. | High strength, but heavier. |
Airflow/Light | Excellent, uninterrupted flow. | Excellent. | Good, but blocked by material at hole edges. |
Cost | Generally cost-effective. | Varies widely. | Can be expensive due to waste (holes are removed material). |
Slip Resistance | Good (especially standard ribbed). | Poor (smooth surface). | Poor (smooth surface). |
