C-35 PS Copper Foil / Polyester Film EMI-RFI Shielding Tape
C-35 PS is a copper foil and polyester film laminate pressure-sensitive tape built from a 0.0014″ copper foil, 0.002″ polyester film, and 0.001″ acrylic adhesive for a total construction of 0.0044″ +/- 10%. It delivers signal attenuation of 115 dB @ 100 MHz, peel strength of 32 oz/inch of width, and a high dielectric strength of 8,800 volts. Breaking strength of 78#/in of width with 10% elongation at break gives the laminate solid structural integrity for converting and installation.
Key Properties
- Peel Strength: 32 oz/inch of width (ASTM D-1000)
- Signal Attenuation: 115dB @ 100 MHz (ASTM D4935-99)
- Breaking Strength: 78#/in of width (ASTM D-882)
- Dielectric Strength: 8,800 volts (ASTM D149)
- Total Thickness: 0.0044″ +/- 10% (ASTM-D-3652)
- Elongation at Break: 10% (ASTM-D-882)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Copper Foil Thickness | 0.0014″ | — |
| Polyester Film Thickness | 0.002″ | — |
| Adhesive Thickness | 0.001″ | — |
| Release Liner | 90# | — |
| Total Thickness | 0.0044″ +/- 10% | ASTM-D-3652 |
| Color | Copper | — |
| 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 |
| Breaking Strength | 78#/in of width | ASTM D-882 |
| Elongation at Break | 10% | ASTM-D-882 |
Electrical Properties
| Property | Value | Test Method |
| Signal Attenuation | 115dB @ 100 MHz | ASTM D4935-99 |
| Dielectric Strength | 8,800 volts | ASTM D149 |
- Shielding electronic enclosures against EMI/RFI interference
- Maintaining shielding continuity across cable and connector assemblies
- Establishing grounding and static drain paths within electronic assemblies
- Protecting PCB and component assemblies from electromagnetic interference
- Providing high-attenuation shielding for sensitive electronic devices
Common industries: Electronics manufacturing, telecommunications, aerospace and defense electronics, consumer electronics, industrial controls.
C-35 PS is a laminate construction combining a 0.0014″ copper foil with a 0.002″ polyester film carrier and a 0.001″ acrylic pressure-sensitive adhesive, engineered for EMI and RFI shielding of electronic enclosures and assemblies. The copper foil forms the conductive shielding layer, the polyester film provides mechanical reinforcement, and the acrylic adhesive delivers a strong, durable bond to substrate surfaces.
The tape is supplied with a 90# release liner in a copper finish and carries a shelf life of one year when stored at 70°F (21°C) and 50% relative humidity. Its notably high 8,800-volt dielectric strength makes it well suited to applications where electrical isolation between shielding layers and adjacent conductive elements is a priority.
What differentiates C-35 PS from other tape grades in the line?
C-35 PS stands out for its high 8,800-volt dielectric strength, well above thinner grades such as C-13 PS or C-20 PS, giving it stronger electrical isolation properties alongside its 115 dB attenuation rating at 100 MHz — making it a good fit where shielding layers must also resist electrical breakdown.
Why is peel adhesion important for C-35 PS?
C-35 PS is rated at 32 oz/inch of width peel strength (ASTM D-1000), which keeps the laminate securely bonded to the substrate through handling and service life. Reliable adhesion prevents edge lifting that would otherwise interrupt shielding continuity and compromise the tape's high dielectric performance.
What is the storage range for C-35 PS?
The TDS specifies a shelf life of 1 year when stored at 70°F (21°C) and 50% relative humidity.
Is C-35 PS suitable for FCC-regulated EMI/RFI shielding environments?
No compliance standard is specified on the manufacturer's TDS for C-35 PS. Measured attenuation performance (115 dB @ 100 MHz per ASTM D4935-99) is provided, but suitability for a specific FCC-regulated application should be confirmed against the relevant project requirements.
How should C-35 PS be specified?
Specify grade (C-35 PS), thickness, color, adhesive type, liner type, compliance requirements, dimensional tolerances, and finished format.
