C-28 NPS Copper Foil / Polyester Film EMI-RFI Shielding Laminate
C-28 NPS is a copper foil and polyester film laminate constructed without adhesive or liner, at a total thickness of 0.0028″. It provides signal attenuation of 105dB @ 100 MHz and a dielectric strength of 8,800 volts, with tensile strength of 21,500 P.S.I. and elongation at break of 100%. 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)
- Tensile Strength: 21,500 P.S.I. (ASTM-D-882)
- Elongation at Break: 100% (ASTM-D-882)
- Dielectric Strength: 8,800 volts (ASTM D149)
- Total Thickness: 0.0028″ (ASTM-D-374)
- Copper Foil Thickness: 0.0007″
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Copper Foil Thickness | 0.0007″ | — |
| Polyester Film Thickness | 0.002″ | — |
| Total Thickness | 0.0028″ | ASTM-D-374 |
| Color | Copper | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 21,500 P.S.I. | ASTM-D-882 |
| Elongation at Break | 100% | ASTM-D-882 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 105dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 8,800 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-28 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 suited to lamination into composite assemblies and enclosure shielding rather than as a pressure-sensitive tape.
At 0.0028″ total thickness, C-28 NPS offers a notably high dielectric strength of 8,800 volts along with 100% elongation at break, giving it substantial conformability during converting operations that require the material to flex or stretch around contours. It is supplied in copper color with a one-year shelf life at 70°F (21°C)/50% R.H.
What differentiates C-28 NPS from other foil laminate grades in the line?
C-28 NPS combines a high dielectric strength of 8,800 volts with 100% elongation at break — substantially more conformable than the thinner, lower-elongation grades in the line — making it suited to converting operations where the shielding layer must flex or stretch during application.
Why does tensile strength matter for C-28 NPS?
Its 21,500 P.S.I. tensile strength, paired with 100% elongation at break, allows C-28 NPS to be stretched, formed, and laminated during converting without tearing, which is important for shielding applications that require the material to conform to non-flat surfaces.
What is the storage range for C-28 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-28 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-28 NPS be specified?
Specify grade (C-28 NPS), thickness, color, compliance requirements, dimensional tolerances, and finished format.
