Mylar / PET Film Insulation Tube
Thin-wall PET (Mylar) film insulation tubes for motor windings, transformer leads and coil assemblies. A cost-down alternative to Nomex, PI and PTFE.
Mylar (PET) film tubes are the general-purpose thin-wall insulation sleeve: good dielectric strength, easy to cut and form, and cheap enough to use in volume on motors, transformers and coils. They are the cost-down answer when a design currently calls for Nomex, polyimide or PTFE but the duty does not need that material's temperature or chemical ceiling.
The application split is by component: motor-winding and compressor-motor insulation, transformer lead and coil insulation, relay and solenoid sleeving, and any assembly where a thin, consistent, inexpensive dielectric sleeve is enough. We develop it as a material-substitution motion -- show us the current Nomex/PI/PTFE spec and we size a PET tube that meets the electrical need at lower cost.
Technical specifications
| Material | PET (Mylar) film tube |
| Wall thickness | Thin wall, consistent across length |
| ID / OD | Multiple sizes, small-batch on request |
| Dielectric | Electrical insulation for winding and lead use |
| Length | Cut to length, custom |
| Temperature | Suitable for standard motor/coil duty (specify) |
| Form | Tube or sleeve, custom size |
Applications by industry
- Motor-winding and compressor-motor insulation
- Transformer lead and coil insulation
- Relay and solenoid component sleeving
- Coil-winding and harness dielectric tubes
- Sensor and instrument thin-wall insulation
- Cost-down substitution for Nomex / PI / PTFE sleeves
Why PET film tube as a cost-down
When the limiting requirement is dielectric insulation at moderate temperature, PET film does the job Nomex, polyimide or PTFE do -- at a fraction of the material cost. It cuts cleanly, holds a consistent thin wall, and is available in the small, mixed-size batches that motor and transformer makers actually order. The trade is temperature and chemical ceiling: where the duty runs hot or aggressive, step up to PI or PTFE.
Wall consistency and assembly review
The usual defect is a wall that varies along the length or a tube that cracks on assembly. We hold wall consistent, deburr the cut, and size ID/OD to the wire or lead so the sleeve slides on without splitting. Specify the wire or lead diameter and the length; we confirm the tube size.
Inspection and traceability
We state the control plan with you. Batch traceability links the film lot to the finished tube and the inspection record.
- Wall consistency checked along length
- ID / OD to stated size
- Clean-cut, deburred ends
- Lot traceability to incoming film certificate
- Dimensional report on request
Related components
Mylar Bolt Insulation Sleeve
Flange-isolation bolt sleeves.
Polyimide Tubing
Where higher temperature is needed.
PTFE Tubing for Medical Devices
Where chemical/thermal duty is higher.
Common questions
Mylar tube applications?
Motor-winding and compressor-motor insulation, transformer lead and coil insulation, relay/solenoid sleeving and general thin-wall dielectric tubing.
PET film electrical insulation properties?
Good dielectric strength for winding and lead insulation at moderate temperature; specify the thermal class for your duty.
Mylar vs polyimide insulation tube?
Polyimide for higher temperature and thinner precision walls; Mylar for standard-duty insulation at lower cost.
Can it replace Nomex or PTFE?
For electrical duty within PET temperature and chemical limits, yes -- it is a cost-down substitution. Confirm the spec before switching.
What sizes are available?
Multiple ID/OD sizes with small-batch and custom-length options; send the lead diameter and length.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Mylar / PET Film Insulation Tube
Send lead/wire diameter, wall, length and quantity, or the current Nomex/PI/PTFE spec you want to substitute. We confirm the PET size.