A-21 PS Aluminum Foil / Polyester Film EMI-RFI Shielding Tape
A-21 PS is an aluminum foil and polyester film laminate tape engineered for EMI and RFI shielding of electronic components, built to a total thickness of 0.0036″ from a 0.001″ aluminum foil, 0.00092″ polyester film, and 0.001″ acrylic pressure-sensitive adhesive. It delivers a peel strength greater than 32 oz./inch of width, a tensile strength of 5,800 P.S.I., and an elongation at break of 75%. The tape is supplied with a 90 lb. release liner.
Key Properties
- Peel Strength: >32 oz./inch of width (ASTM-D-1000)
- Tensile Strength: 5,800 P.S.I. (ASTM-D-882)
- Total Thickness: 0.0036″ (PSTC-33)
- Elongation at Break: 75% (ASTM-D-882)
- Release Liner: 90 lb.
- Color: Silver
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Aluminum Foil Thickness | 0.001″ | — |
| Polyester Film Thickness | 0.00092″ | — |
| Adhesive Thickness | 0.001″ | — |
| Release Liner | 90 lb. | — |
| Total Thickness | 0.0036″ | PSTC-33 |
| Color | Silver | — |
| Shelf Life | 1 year @ 70°F(21°C)/50% R.H. | — |
Mechanical Properties
| Property | Value | Test Method |
| Peel Strength | >32 oz./inch of width | ASTM-D-1000 |
| Tensile Strength | 5,800 P.S.I. | ASTM-D-882 |
| Elongation at Break | 75% | ASTM-D-882 |
- EMI/RFI shielding for electronic enclosures
- Cable and connector shielding
- Grounding and static drain applications
- Shielding for PCB and component assemblies
- Electronics equipment shielding in aerospace and industrial systems
Common industries: Electronics manufacturing, aerospace, industrial equipment, telecommunications.
A-21 PS is a pressure-sensitive laminate constructed from a 0.001″ aluminum foil, a 0.00092″ polyester film carrier, and a 0.001″ acrylic adhesive system, built to a mid-range total thickness of 0.0036″. The construction is intended for EMI and RFI shielding of electronic enclosures, cables, connectors, and PCB assemblies, with a peel strength greater than 32 oz./inch of width providing a durable bond during installation.
The material’s 75% elongation at break allows it to conform to irregular or contoured surfaces during application and converting. It is finished in silver, is supplied with a 90 lb. release liner to support clean unwind and precision die-cutting, and carries a one-year shelf life when stored at 70°F (21°C) and 50% relative humidity.
What differentiates A-21 PS from other tape grades in the line?
A-21 PS sits in the mid-thickness range of the line at 0.0036" and is distinguished less by electrical performance — no signal attenuation or dielectric data is listed on its TDS — and more by its balance of >32 oz./inch peel strength and 75% elongation at break, giving it good conformability for general-purpose shielding and grounding applications where documented attenuation figures are not a specification requirement.
Why is peel adhesion important for A-21 PS?
Peel adhesion determines how well A-21 PS stays bonded to the enclosure, cable, or component surface after installation. A peel strength greater than 32 oz./inch of width helps the tape resist edge lifting and adhesive failure through handling and continued service, keeping the shielding path intact.
What is the storage range for A-21 PS?
The TDS specifies a shelf life of 1 year when stored at 70°F (21°C) and 50% relative humidity; no separate operating temperature range is stated on the manufacturer's TDS.
Is A-21 PS suitable for FCC-regulated EMI/RFI shielding environments?
No compliance standard is stated on the A-21 PS TDS, so suitability for FCC-regulated EMI/RFI shielding environments cannot be confirmed from the manufacturer's documentation for this specific grade.
How should A-21 PS be specified?
Specify grade (A-21 PS), thickness, color, adhesive type, liner type, compliance requirements, dimensional tolerances, and finished format.
