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How is the Temperature Resistance of PET Coated Iron Wire?

2026.01.22

Author：PET coated iron wire

The temperature resistance of PET coated iron wire is one of its core performance characteristics, directly affecting its applicability and service life in different environments. The following details its temperature range and performance variations:

1. Standard Temperature Range

Regular Models:

Operating Temperature: -20℃ to 80℃

Within this range, the PET coating maintains stable physical properties (e.g., hardness, flexibility) and chemical stability (e.g., corrosion resistance, aging resistance), suitable for most indoor and outdoor applications.

Short-Term Withstand Limit: Some products can withstand temperatures up to 100℃ briefly (e.g., within 10 minutes), but long-term exposure will cause the coating to soften, stick, or discolor.

Special Treatment Models

Low-Temperature Resistant: By adding antifreeze agents or adjusting the molecular structure, the low-temperature resistance can be increased to -40℃, suitable for extreme environments such as cold storage and polar regions.

High-Temperature Resistant: Using modified PET (e.g., copolyester) or adding flame retardants, the upper temperature limit can be increased to 120℃-150℃, but the cost increases significantly, and it is mostly used in high-temperature industrial applications.

2. Effects of Temperature on Performance

Low Temperature Environment (below -20℃):

Coating Embrittlement: PET molecular chains shrink at low temperatures, causing the coating to harden and become more brittle, making it prone to cracking due to bending or impact.

Decreased Adhesion: The difference in thermal expansion coefficients between the wire and the coating may cause interfacial peeling, reducing the protective effect.

Application Limitations: Avoid use in extremely cold regions where frequent bending is required (e.g., for bundling flowers). Prioritize low-temperature resistant coatings or increase coating thickness.

High Temperature Environment (above 80℃):

Softening and Deformation: The PET coating softens at high temperatures, which may cause the wire to stick to the surface (e.g., during stacking) or deform due to gravity.

Oxidative Degradation: Long-term high temperatures accelerate coating oxidation, resulting in yellowing, powdering, and decreased corrosion resistance.

Application Limitations: Avoid direct contact with high-temperature objects (e.g., steam pipes). In industrial settings, it is recommended to use with thermal insulation materials.

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 PET coated iron 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