Mylar (PET) Shrink Tubing for Insulation and Wrap
Polyester shrink tubing for phase insulation and wrap. Mylar shrink tubing gives a薄, tough polyester insulation layer used for phase isolation and wrap in coils and buses. We supply it in the width and recovery for your part, with dielectric suited to the voltage. Yes. Its thin tough dielectric is used for phase isolation and wrap where space is tight. Bolt sleeves that break the galvanic path at
Polyester shrink tubing for phase insulation and wrap. Mylar shrink tubing gives a薄, tough polyester insulation layer used for phase isolation and wrap in coils and buses. We supply it in the width and recovery for your part, with dielectric suited to the voltage. Yes. Its thin tough dielectric is used for phase isolation and wrap where space is tight. Bolt sleeves that break the galvanic path at
Technical specifications
| Material | Polyester (PET / Mylar) |
| Use | Phase insulation, wrap |
| Property | Thin, tough dielectric |
| Standard | ASTM D5487 (polyimide film), IEC 60672 (thermal classification). |
| Operating temperature | -269 °C to +400 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- Clear wrap tubing for capacitor and coil insulation
- Bobbin and transformer clear barrier film
- Label and marker clear sleeve over wire bundles
- Lightweight cable bundling and shroud film
- Lamp and lighting reflector insulation sleeves
- Die-cut and heat-weldable PET film in appliance assemblies
Why mylar (PET) film for this application
Clear PET film gives see-through insulation and wrap for components that must stay inspectable, holding dielectric at low-to-moderate temperature without the cost of heat-shrink on glass systems.
Softens above ~105–150 °C continuous — not for heater or arc zones. Confirm adhesive vs heat-sealed seam for hermetic claims.
Standards: IEC 60250 (dielectric), UL 94 V-0/VTM (grade dependent), RoHS.
Feature and remaining-wall review
Precision ID/OD grinding; CNC cutting for slots, holes and end finishes. Critical tolerances on conditioned material. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Mylar Sleeve for Flange Bolt Insulation
Related insulation component from the WELLELE catalog.
Polyimide Capillary Tube for Sensors
Related insulation component from the WELLELE catalog.
Acrylic Fiberglass Sleeving
Related insulation component from the WELLELE catalog.
Common questions
Is polyimide suitable for precision sensor applications?
Yes. Its dimensional stability and dielectric properties make it ideal for capillary tubes in RTD and thermocouple sensors.
How does moisture affect polyimide?
Polyimide is hygroscopic. Condition material to your humidity spec before machining to hold critical tolerances.
Can you hold tight tolerances on polyimide tubes?
ID/OD ±0.02 mm achievable on conditioned material using precision grinding.
What standards apply to polyimide tubing?
ASTM D5487 (polyimide film), IEC 60672 (thermal classification). Material COA supplied per batch.
Mylar tubing for phase insulation?
ASTM D5487 (polyimide film), IEC 60672 (thermal classification). Material COA supplied per batch.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Mylar (PET) Shrink Tubing for Insulation and Wrap
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.