C-58 NPS Copper Foil / Polyester Film EMI-RFI Shielding Laminate
C-58 NPS is a copper foil and polyester film laminate constructed without adhesive or liner, at a total thickness of 0.0059″ +/- 10%. It provides signal attenuation of 105dB @ 100 MHz and a dielectric strength of 13,500 volts. Its unsupported construction makes it well suited for applications where a self-contained shielding layer is required rather than a pressure-sensitive tape.
Key Properties
- Signal Attenuation: 105dB @ 100 MHz (ASTM D4935-99)
- Dielectric Strength: 13,500 volts (ASTM D149)
- Total Thickness: 0.0059″ +/- 10% (ASTM-D-374)
- Copper Foil Thickness: 0.0007″
- Polyester Film Thickness: 0.005″
- Color: Copper
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Copper Foil Thickness | 0.0007″ | — |
| Polyester Film Thickness | 0.005″ | — |
| Total Thickness | 0.0059″ +/- 10% | ASTM-D-374 |
| Color | Copper | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 105dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 13,500 volts | ASTM D149 |
- EMI/RFI shielding for electronic enclosures
- Cable and connector shielding
- Lamination into composite shielding assemblies
- Shielding of PCB and component assemblies
- High-attenuation shielding for sensitive electronics
Common industries: Electronics manufacturing, telecommunications, cable and connector fabrication, aerospace/defense electronics, industrial controls.
C-58 NPS is an unsupported copper foil laminated to a polyester film carrier, engineered for EMI and RFI shielding of electronic components. Free of adhesive or liner, it functions as a self-contained shielding layer intended for enclosure and composite assembly shielding rather than as a pressure-sensitive tape.
At 0.0059″ total thickness, C-58 NPS is the heaviest-gauge grade in the copper foil/polyester film shielding line and delivers the highest dielectric strength of the series at 13,500 volts. It is supplied in copper color with a one-year shelf life at 70°F (21°C)/50% R.H.; no tensile strength or elongation values are reported on the manufacturer’s TDS for this grade.
What differentiates C-58 NPS from other foil laminate grades in the line?
At 0.0059" total thickness, C-58 NPS is the heaviest-gauge grade in the line and delivers the highest dielectric strength (13,500 volts) of the series, making it the choice when maximum dielectric margin is the primary requirement rather than thin-gauge converting.
Why does tensile strength matter for C-58 NPS?
The manufacturer's TDS does not report tensile strength or elongation values for C-58 NPS; converters should evaluate the material's heavier 0.0059" gauge directly during processing trials to confirm compatibility with slitting, die-cutting, and lamination equipment.
What is the storage range for C-58 NPS?
The manufacturer's TDS lists a shelf life of 1 year when stored at 70°F (21°C) and 50% relative humidity.
Is C-58 NPS suitable for FCC-regulated EMI/RFI shielding environments?
No compliance standard is specified on the manufacturer's TDS for this material; specifiers requiring FCC or other regulatory certification should confirm suitability independently.
How should C-58 NPS be specified?
Specify grade (C-58 NPS), thickness, color, compliance requirements, dimensional tolerances, and finished format.
