{
  "id": "materials:woremor-wm-cs300",
  "collection": "materials",
  "slug": "woremor-wm-cs300",
  "name": "WM-CS300 copper shielding fabric",
  "summary": "Light copper- and nickel-metallised polyester non-woven declared at up to 65 dB across 30 MHz to 20 GHz with up to 0.1 Ω surface resistivity, air-permeable and used as a technical shielding layer rather than a finished shield.",
  "status": "verified",
  "lastVerified": "2026-08-12",
  "data": {
    "aliases": [
      "WM-CS300",
      "MFT-300",
      "copper shielding fabric"
    ],
    "manufacturer": "WOREMOR",
    "model": "WM-CS300",
    "materialClass": "shielding-fabric",
    "targets": [
      "radiofrequency",
      "elf-electric"
    ],
    "attenuation": [
      {
        "db": 65,
        "frequency": "30 MHz – 20 GHz",
        "configuration": "single layer, manufacturer's stated maximum",
        "quantity": "power-density"
      }
    ],
    "testMethod": "Manufacturer-declared band figure; WOREMOR states attenuation values apply at 1 GHz with measurement to ASTM D4935-10 or IEEE Std 299-2006 unless a band is named.",
    "construction": "Non-woven polyester (MILIFE) with copper/nickel metallisation and a surface finish, 37 ± 1 g/m², 7 ± 1 g/m² deposited metal, tensile strength 100 MD / 65 CD N per 50 mm, 1 m wide.",
    "surfaceResistance": "up to 0.1 Ω surface resistivity",
    "requiresGrounding": false,
    "application": [
      "Technical shielding layers in apparel, electronics and vehicles",
      "Healthcare and architectural assemblies",
      "Intermediate layer where weight and air permeability matter"
    ],
    "limitations": [
      "“Up to 65 dB” is a band maximum, not a value that holds across 30 MHz to 20 GHz, and no per-frequency curve is published with it",
      "At 37 g/m² the material is a thin non-woven; handling damage reduces attenuation invisibly",
      "The manufacturer states anti-corrosive treatment, but a metallised coating still abrades, so long-term performance is not the declared performance",
      "A technical layer rather than a finished shield: it needs conductive joining and an enclosure design to reach anything like the declared figure"
    ],
    "availability": {
      "vendor": "EMR Shielding Solutions",
      "url": "https://www.emrss.com/products/woremor-mft-300-copper-shielding-fabric-width-1m",
      "relationship": "owned"
    },
    "related": [
      "shielding:fabric",
      "quantities:attenuation"
    ]
  },
  "sources": [
    {
      "id": "woremor-wm-cs300",
      "title": "WM-CS300 copper/nickel metallised non-woven — technical data",
      "publisher": "WOREMOR",
      "url": "https://www.woremor.com/products/wm-cs300",
      "kind": "manufacturer",
      "retrieved": "2026-08-12"
    }
  ],
  "links": {
    "self": "https://emfbase.com/api/materials/woremor-wm-cs300",
    "html": "https://emfbase.com/materials/woremor-wm-cs300",
    "markdown": "https://emfbase.com/materials/woremor-wm-cs300.md",
    "collection": "https://emfbase.com/api/materials"
  }
}