Polyester Shrinkable Insulation Tape

Class F Heat Shrink Binding Tape for Transformer, Motor and Reactor Windings

Electrical Polyester Shrinkable Tape is a heat-activated insulation binding tape designed for securing coils and windings in motors, transformers, reactors, and other electrical equipment.

After heating, the tape shrinks tightly around the winding, providing strong mechanical consolidation, stable electrical insulation, and long-term thermal resistance up to Class F (155 °C).

Compared with conventional cloth or non-shrink insulation tapes, polyester shrinkable tape delivers better dimensional stability, tighter binding, and improved reliability in demanding electrical environments.

Main Specifications

• Material: Modified polyester fiber

• Thermal Class: Class F (155 °C)

• Shrinkage Rate: ≥ 30% after heating

• Typical Thickness: 0.23 mm / 0.26 mm / 0.29 mm

• Available Widths: 10 mm – 50 mm (custom sizes available)

• Color: Natural / custom on request

• Electrical Performance: High dielectric strength, suitable for electrical insulation systems

• Compatibility: Suitable for use in transformer oil environments

Advantages of Polyester Shrinkable Tape:

• Strong binding force after shrinkage, preventing coil loosening

• Excellent heat resistance, maintaining stability at elevated operating temperatures

• Good mechanical strength, resisting tearing and deformation during assembly

• Stable insulation performance, even under repeated thermal cycles

These characteristics make polyester shrinkable tape especially suitable for high-reliability electrical insulation systems where long service life is required.

Applications of Polyester Shrinkable Tape:

Electrical Polyester Shrinkable Tape is widely used in the following applications:

• Motor winding insulation and binding

• Transformer insulation material coil consolidation

• Reactor and choke winding reinforcement

• Large electrical machines and industrial equipment

How to Use Electrical Polyester Shrinkable Tape

1. Select the appropriate tape width according to coil or winding size

2. Wrap the tape around the winding with consistent overlap

3. Apply uniform heat (typically around 150 °C) until full shrinkage occurs

4. Allow the assembly to cool and inspect binding tightness

Proper heating ensures consistent shrinkage and optimal mechanical performance.

Frequently Asked Questions(FAQ)

Q1:What is the main purpose of polyester shrinkable tape?

A:It is used to bind and secure electrical windings while providing stable insulation after heat shrinkage.

Q2:Can this tape be used in transformer oil?

Yes. The material is suitable for transformer oil environments and commonly used in transformer applications.

Q3:What shrinkage rate should I expect?

Typical shrinkage is ≥ 30% under recommended heating conditions.

Custom Sizes and OEM Supply

We supply Electrical Polyester Shrinkable Tape in standard and custom specifications to meet different electrical design requirements.

Custom width, thickness, and packaging options are available for OEM and bulk orders.