Polyimide tape · Ref. 4201
Amber polyimide film tape with silicone adhesive, for thermal and chemical protection and electrical insulation. It works under continuous exposure at 180 °C and withstands up to 280 °C without leaving residue. Excellent chemical resistance, high corrosion resistance and dielectric strength of 5000 V or more. Widths from 2 mm.
Amber polyimide · Silicone adhesive · Thermal class 180 °C · Electrical insulation · Electronics · Transformers and motors · Lithium batteries
When is this the right tape?
Thermal and chemical protection of components and boards during the process
Insulating tape in transformers, traction motors and generators
Electrical insulation in the manufacture of lithium batteries
Continuous exposure at 180 °C and up to 280 °C without leaving residue
Always validate the tape on your actual part and in your real cycle (temperature and time) before starting production.
Why Ref. 4201
When polyester is not enough
Ref. 4201 is a 25 µm amber polyimide film tape with silicone adhesive. Polyimide is the film used when the tape has to withstand temperatures above those of polyester and, at the same time, provide electrical insulation: its thermal class is 180 °C, it allows continuous exposure at that temperature and it withstands up to 280 °C without leaving residue.
According to the data sheet, it has excellent chemical and thermal resistance, high corrosion resistance and excellent electrical insulation, with a dielectric strength of 5000 V or more. It is used in electronics, for thermal and chemical protection, and as insulating tape in the manufacture of transformers, traction motors, generators and lithium batteries.
It is supplied in 33 m rolls and in widths from 2 mm, according to the customer's specification. For masking in powder coating, cataphoresis or anodizing, the reference tapes are the polyester ones with silicone adhesive, Ref. 2560 and Ref. 3565; if your cycle exceeds 200-210 °C, let us know and we will assess Ref. 4201 with a sample.
Before specifying
Temperature
180 °C continuous · 280 °C max.
Thermal class 180 °C. Up to 280 °C without residue: validate the exposure time in your process.
Adhesive
Silicone · 5.0–6 N/25 mm
Adhesion according to ASTM D3330 · Good adhesion.
Format
33 m rolls · From 2 mm
Width according to the customer's specification.
Ref. 4201 · Amber polyimide / Silicone · Lit-Off Desarrollo
Technical properties of the tape
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Color | Amber | — | Visual |
| Polyimide film (backing) | 0.025 ± 0.002 | mm | ASTM D3652 |
| Total thickness | 0.065 ± 0.006 | mm | ASTM D3652 · Film + silicone adhesive |
| Adhesion | 5.0–6 | N/25 mm | ASTM D3330 |
| Mechanical strength | 50 | N/cm | — |
| Tensile strength | ≥ 120 | MPa | ASTM D3759 |
| Elongation | 65 | % | ASTM D3759 |
| Temperature · continuous exposure | 180 | °C | Thermal class 180 °C |
| Temperature · maximum without residue | 280 | °C | Validate the exposure time in your process |
| Dielectric strength | ≥ 5000 | V | Excellent electrical insulation |
| Roll length | 33 | m | Widths from 2 mm, according to customer specification |
| Storage | 20-30 °C / 40-65 % RH | — | 1 year under these conditions · Avoid direct sunlight |
Data from the material's technical data sheet. These are laboratory values, not a guarantee: always validate the tape on your actual part and in your actual process.
Tape Ref. 4201 — key performance
Behaviour against conditions of use
Temperature
Continuous exposure at 180 °C and up to 280 °C without residue, according to the data sheet
Electrical insulation
Dielectric strength ≥ 5000 V · Transformers, motors, generators and batteries
Chemicals and corrosion
Excellent chemical resistance and high corrosion resistance
Powder coating
The data sheet does not mention it for powder coating · For masking, the polyester tapes
Composition
How it is built
Do you need to validate this tape in your process?
Tell us what process the tape is used in, at what temperature and for how long, and what width you need. We will confirm whether Ref. 4201 or one of the polyester tapes is the right one and send you a sample.
Technical documentation
For more technical detail, we have the full version of the Technical Data Sheet in PDF format.
Download PDF specificationSupply details
Free technical sample
We send it before production, so you can validate it in your actual process.
Response in less than 24 hours
Technical consultation handled by specialists since 1994.
Format
33 m rolls; widths from 2 mm, according to your specification.
Delivery throughout Europe
We supply to the entire European Union.
Frequently asked questions
What temperature does Ref. 4201 withstand?
Its thermal class is 180 °C: it allows continuous exposure at 180 °C and withstands up to 280 °C without leaving residue, according to the technical data sheet. Validate the exposure time in your process.
What is it used for?
In electronics, for thermal and chemical protection, and as insulating tape in the manufacture of transformers, traction motors, generators and lithium batteries.
Is it suitable for masking in powder coating?
The technical data sheet does not mention it for powder coating. For masking in powder coating, cataphoresis or anodizing there are the polyester tapes with silicone adhesive, Ref. 2560 (200 °C) and Ref. 3565 (210 °C). If your cycle exceeds those temperatures, let us know and we will assess it with a sample.
What electrical insulation does it offer?
A dielectric strength of 5000 V or more, with excellent electrical insulation according to the data sheet.
What widths is it supplied in?
In 33 m rolls and in widths from 2 mm, according to the customer's specification.
Do you need to validate this tape?
Tell us the process, the curing temperature and time, and the areas to be protected. We will send you a sample to test on your actual part.
- Free technical advice with no obligation.
- Response in less than 24 hours.
- Material samples when the project requires it.
