A-21 NPS Aluminum Foil / Polyester Film EMI-RFI Shielding Laminate
A-21 NPS is an aluminum foil and polyester film laminate engineered for EMI and RFI shielding of electronic components. Supplied without adhesive or liner, the 0.0021″ laminate delivers a tensile strength of 5,800 P.S.I. and elongation at break of 75%. 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
- Tensile Strength: 5,800 P.S.I. (ASTM-D-882)
- Elongation at Break: 75% (ASTM-D-882)
- Total Thickness: 0.0021″ (PSTC-33)
- Aluminum Foil Thickness: 0.001″
- Polyester Film Thickness: 0.00092″
- Color: Silver
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Aluminum Foil Thickness | 0.001″ | — |
| Polyester Film Thickness | 0.00092″ | — |
| Total Thickness | 0.0021″ | PSTC-33 |
| Color | Silver | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 5,800 P.S.I. | ASTM-D-882 |
| Elongation at Break | 75% | ASTM-D-882 |
- EMI/RFI shielding for electronic enclosures
- Shielding of cable and connector assemblies
- Lamination into composite shielding constructions
- Shielding of PCB and component assemblies
- Self-contained shielding layer integration where pressure-sensitive tape systems are not suitable
Common industries: Electronics manufacturing, industrial equipment, and telecommunications.
A-21 NPS is an unsupported aluminum foil and polyester film laminate built around a heavier 0.001″ aluminum foil layer than the lower-numbered A-10 NPS and A-15 NPS grades, giving it a more robust foil layer for use as a self-contained EMI/RFI shielding material without an adhesive system. Its total thickness of 0.0021″ places it in the mid-range of the A-Series foil/film laminate line.
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. A tensile strength of 5,800 P.S.I. and elongation at break of 75% support slitting, die-cutting, and lamination into finished shielding assemblies during converting operations.
What differentiates A-21 NPS from other foil laminate grades in the A-Series line?
A-21 NPS uses a heavier 0.001" aluminum foil layer than the lower-numbered A-10 NPS and A-15 NPS grades, giving it a more robust foil for converting into thicker assemblies. Unlike several other grades in the line, its manufacturer TDS does not publish signal attenuation or dielectric strength data, so its electrical performance is not specified.
Why does tensile strength matter for A-21 NPS?
As an unsupported foil/film laminate with no adhesive backing, A-21 NPS depends on its 5,800 P.S.I. tensile strength and 75% elongation at break to withstand slitting, die-cutting, and lamination without tearing the foil or delaminating the film during converting.
What is the storage range for A-21 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.
Is A-21 NPS suitable for FCC-regulated EMI/RFI shielding environments?
No — the manufacturer's TDS for A-21 NPS does not state an FCC or any other compliance standard, so suitability for FCC-regulated programs would need to be independently verified.
How should A-21 NPS be specified?
Specify grade (A-21 NPS), thickness, color, compliance requirements, dimensional tolerances, and finished format.
