The difference between polyester enameled wire and polyesterimide enameled wire

Polyester enameled wire and polyesterimide enameled wire are two common electromagnetic wires. The main differences are reflected in temperature resistance, chemical properties, mechanical properties and application scenarios. Polyester enameled wire has low cost and high mechanical strength as its core advantages, and is suitable for normal temperature scenarios; while polyesterimide enameled wire is characterized by high temperature resistance and chemical corrosion resistance, and is designed for extreme environments. When choosing, you need to consider the operating temperature, environmental conditions and cost budget of the equipment.

Differences between polyester enameled wire and polyesterimide enameled wire

• 1. Temperature resistance and insulation performance

Polyester enameled wire:

◆ Temperature resistance grade: usually Class B (130℃), some modified polyester enameled wires can reach Class F (155℃).

◆ Insulation material: Polyester resin coating is used, which has good scratch resistance and solvent resistance, but poor heat shock resistance, and is easy to soften or age at high temperature.

Polyesterimide enameled wire:

◆ Temperature resistance grade: generally Class H (180℃), some composite coating products can reach Class C (200℃ and above).

◆ Insulation material: mainly polyester imide resin, the heat shock resistance and softening breakdown temperature are significantly better than polyester enameled wire, and it is more stable in extreme environments such as high temperature, high cold, and radiation.

• 2. Mechanical and chemical properties

Polyester enameled wire:

◆ Mechanical strength: high elasticity and scratch resistance, suitable for scenes requiring frequent winding or mechanical vibration.

◆ Chemical properties: good solvent resistance, but weak moisture resistance, long-term exposure to humid environments may affect insulation performance.

Polyesterimide enameled wire:

◆ Mechanical strength: better than ordinary polyester wire, with higher flexibility and adhesion, especially suitable for complex winding processes.

◆ Chemical properties: better resistance to refrigerants, radiation, oil and chemical corrosion, but it may be used with caution in closed environments due to hydrolysis problems.

• 3. Application scenarios

Polyester enameled wire:

◆ Widely used in ordinary motors, household appliances (such as refrigerators, washing machines), instruments, telecommunications equipment and other cost-sensitive and low-operating temperature fields.

◆ Typical uses: small transformers, relay coils, lighting equipment, etc.

Polyesterimide enameled wire:

◆ Mainly used for equipment in high temperature, high load or special environment, such as air conditioning compressors, power tool motors, explosion-proof motors, new energy vehicle drive motors, etc.

◆ It performs well in industrial equipment that needs to be resistant to heat shock, radiation or overload operation.

• 4. Cost and production specifications

Polyester enameled wire:

◆ It has low cost and mature production technology. It is the largest type of enameled wire in my country (accounting for about 2/3).

◆ It covers a wide range of specifications, and the diameter range is usually 0.04-2.50mm (copper round wire).

Polyesterimide enameled wire:

◆ It has a high cost, but the cost performance is significant in high temperature scenarios, and it is suitable for fields with strict requirements on heat resistance.

◆ It is mostly used for small and medium-sized wires (fine wires to medium specifications), and large-specification wires are difficult to produce.

• 5. Standards and models

Polyester enameled wire:

◆ Common models: QZ (such as QZ-1, QZ-2), implementation standards such as GB/T 6109-2008 (copper round wire).

Polyesterimide enameled wire:

◆ Common models: QZY (such as QZY-180), composite coating models such as Q (ZY/XY), implementation standards involve requirements for higher heat resistance levels.

Original Source:Magnet Wires for Power Industry

Tags:polyester enameled aluminum (copper) round wire, polyesterimide enameled aluminum (copper) round wire