Overview
Electrolytic copper mesh is manufactured through an electrolytic refining process that yields high-purity copper (≥99.9%). The material is then drawn into wires and woven into mesh patterns ranging from coarse to ultra-fine densities. Unlike regular copper mesh, electrolytic variants exhibit superior conductivity due to reduced oxide content and controlled crystalline structure. This makes them indispensable in precision applications like aerospace EMI shielding and laboratory-grade filtration systems.
Physical and Chemical Properties
The mesh combines copper's inherent properties – 100% IACS electrical conductivity (second only to silver) and thermal conductivity of 401 W/m·K – with structural flexibility from weaving techniques. Typical tensile strength ranges from 200-300 MPa. Chemically, it forms a protective patina (cuprous oxide) when exposed to air, slowing further corrosion. However, prolonged contact with ammonia, sulfur compounds, or acidic environments requires protective coatings like tin plating or polymer lamination.
Main Applications
In electronics, 200+ mesh count variants serve as Faraday cages in sensitive equipment. Coarser meshes (20-60 mesh) are used in chemical processing for catalyst support and demister pads. Architecturally, expanded copper mesh provides decorative cladding with natural weathering properties. Recent innovations include antimicrobial copper mesh for HVAC systems, leveraging copper's biocidal properties (EPA-registered antimicrobial surface).
Safety and Storage
Store rolls in moisture-controlled environments (<60% RH) to prevent accelerated oxidation. Use VOC-free packaging for long-term storage. When cutting, employ local exhaust ventilation to control copper dust (OSHA PEL: 1 mg/m³ as Cu). Provide workers with P2 respirators during extensive fabrication. Note that some jurisdictions classify copper waste as hazardous material requiring special disposal.
B2B Procurement Guide
Key specifications to confirm: 1. Mesh count (openings per linear inch) 2. Wire diameter tolerance (±0.01mm for precision uses) 3. Roll dimensions (standard: 1m×30m, custom widths available) 4. Surface treatment (bare, oxidized, or pre-patinated) For bulk orders (≥500m²), negotiate mill-direct pricing with Chinese producers in Jiangsu/Zhejiang provinces, where 70% of global electrolytic copper mesh originates. Lead times typically range 4-6 weeks for customized orders.
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