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How Heat Resistant are White PET Coated Wires?

2025.11.20

Author：white PET coated wire

White PET coated wires exhibit excellent heat resistance, with a long term operating temperature up to 120℃, short term resistance to 150℃, and maintaining toughness even at -70℃. Specific analysis is as follows:

1. Long-term Heat Resistance

Basic Performance: The long-term operating temperature of PET substrate is 120℃, making it suitable for applications requiring continuous high temperature operation, such as industrial equipment and automotive engine compartments.

Modification and Reinforcement: By reinforcing with glass fiber or adding nucleating agents, the heat distortion temperature and long-term operating temperature of PET can be further improved, making it one of the most heat resistant thermoplastic engineering plastics. For example, reinforced PET shows almost no discoloration after immersion in a 250℃ solder bath for 10 seconds, making it suitable for manufacturing solderable electronic and electrical components.

2. Short-term Heat Resistance

Short-term High Temperature Resistance: PET exhibits stability under short term high temperatures, withstanding 150℃, meeting the requirements of welding and high temperature processing.

Low-Temperature Adaptability: PET's embrittlement temperature is -70℃, and it maintains toughness even at -30℃, making it suitable for low-temperature environments.

3. Thermal and Dimensional Stability

Thermal Stability: PET has low thermal expansion and dimensional shrinkage rates, making it less affected by temperature and suitable for precision wiring requirements.

Dimensional Stability: PET exhibits minimal dimensional changes under high or low temperature conditions, ensuring stable wire performance.

4. Auxiliary Role of the White Coating

Heat Reflection: The high reflectivity of the white coating reduces heat absorption, helping to lower the wire surface temperature and extend its lifespan in high-temperature environments.

Mechanical Protection: The coating enhances the abrasion and scratch resistance of the insulation layer, reducing the risk of mechanical damage.

Qingdao Chenan Machinery Co., Ltd. has the advantage of developing and producing rubber winding equipment, with higher technology than various equipment assembly manufacturers in the industry. For more information about white PET coated wire, please contact us.

Company: Qingdao Chenan Machinery Co., Ltd.

Address: Yanjialing Industrial Park, East Chengma Road, Tongji New Economic Zone, Jimo District, Qingdao City, Shandong Province

Email: qdcajx@gmail.com