A-31 NPS Aluminum Foil / Polyester Film EMI-RFI Shielding Laminate
A-31 NPS is an aluminum foil and polyester film laminate engineered for EMI and RFI shielding of electronic components, providing signal attenuation of 112 dB at 100 MHz. Supplied without adhesive or liner, the 0.0031″ laminate delivers a dielectric strength of 8,800 volts, tensile strength of 16,200 psi, and elongation of 100%. The laminate is manufactured in compliance with FCC Regulations, Docket Number 20780, Volume II, Part 15, Subpart 5.
Key Properties
- Signal Attenuation: 112 dB @ 100 MHz (ASTM D4935-99)
- Tensile Strength: 16,200 psi (ASTM D-882)
- Elongation: 100% (ASTM-D-882)
- Dielectric Strength: 8,800 volts (ASTM D149)
- Total Thickness: 0.0031″ +/- 10% (PSTC-33)
- Aluminum Foil Thickness: 0.001″
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Aluminum Foil Thickness | 0.001″ | — |
| Polyester Film Thickness | 0.002″ | — |
| Total Thickness | 0.0031″ +/- 10% | PSTC-33 |
| Color | Silver | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 16,200 psi | ASTM D-882 |
| Elongation | 100% | ASTM-D-882 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 112 dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 8,800 volts | ASTM D149 |
Compliance
- FCC Regulations, Docket Number 20780, Volume II, Part 15, Subpart 5 — Compliant
- EMI/RFI shielding for electronic enclosures
- Shielding of cable and connector assemblies
- Lamination into composite shielding constructions
- Shielding of PCB and component assemblies
- High-attenuation shielding for sensitive electronic assemblies
Common industries: Electronics manufacturing, telecommunications, industrial equipment, and defense/military systems.
A-31 NPS is an unsupported aluminum foil and polyester film laminate built with a heavier 0.001″ aluminum foil layer, delivering 112 dB of signal attenuation at 100 MHz — higher than the 95 dB rating shared by most other grades in the A-Series line. This higher attenuation level, combined with a self-contained construction that requires no adhesive system, makes it suited to shielding applications where a greater degree of RF attenuation is called for.
The laminate is supplied in silver and carries a manufacturer-rated shelf life of one year when stored at 70°F (21°C) and 50% relative humidity. Its 16,200 psi tensile strength and 100% elongation give it strong mechanical integrity and conformability for slitting, die-cutting, and lamination into finished shielding assemblies. Compliant with FCC Regulations, Docket Number 20780, Volume II, Part 15, Subpart 5.
What differentiates A-31 NPS from other foil laminate grades in the A-Series line?
A-31 NPS delivers 112 dB of signal attenuation at 100 MHz, well above the 95 dB rating common to most other grades in the family, giving it stronger shielding effectiveness for demanding RF environments. It is also the only grade in this group whose TDS states compliance with FCC Regulations, Docket Number 20780, Volume II, Part 15, Subpart 5.
Why does tensile strength matter for A-31 NPS?
As an unsupported foil/film laminate with no adhesive backing, A-31 NPS relies on its 16,200 psi tensile strength and 100% elongation to withstand slitting, die-cutting, and lamination into finished assemblies without tearing the foil or delaminating the film during converting.
Is A-31 NPS suitable for FCC-regulated EMI/RFI shielding environments?
Yes — the manufacturer's TDS states that A-31 NPS is manufactured in compliance with FCC Regulations, Docket Number 20780, Volume II, Part 15, Subpart 5.
What is the storage range for A-31 NPS?
The manufacturer's TDS rates shelf life at 1 year when stored at 70°F (21°C) and 50% relative humidity. No separate operating temperature range is specified on the TDS.
How should A-31 NPS be specified?
Specify grade (A-31 NPS), thickness, color, compliance requirements, dimensional tolerances, and finished format.
