Technical Principles and Process Flow of PET Wire Coating Machine

2025.09.16

Author：PET wire coating machine

PET wire coating machine typically refers to specialized equipment used to apply insulation, sheathing, or functional coatings to PET film or related substrates. Its core function is to uniformly adhere conductive, insulating, or special functional coatings to the PET substrate through high-precision coating technology, creating a composite structure that meets the electrical, mechanical, or specialized application requirements of wires and cables.

The operating principle of PET wire coating machine is based on fluid dynamics and precision control technology. The main processes include:

1. Substrate Pretreatment: Corona treatment, dust removal, or surface modification are used to improve adhesion between the PET film and the coating.

2. Coating Supply: A pumping system is used to deliver conductive slurry, insulating varnish, or specialty coatings (such as flame-retardant or high-temperature-resistant coatings) to the coating head.

3. High-Precision Coating:

Micro-gravure Coating: Suitable for ultra-thin coatings, with thickness control accuracy of up to ±0.5μm.

Slot Extrusion Coating: Uniform coating is achieved through die gap adjustment and is suitable for high-viscosity materials.

Spray Coating: Suitable for complex structures or localized coatings, such as insulation reinforcement at wire joints.

4. Drying and Curing: Infrared heating, hot air circulation, or UV curing technologies are used to ensure rapid coating curing without bubbles or cracks.

5. Online Inspection: Laser thickness gauges and CCD vision systems monitor coating thickness, uniformity, and surface defects in real time.

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 wire coating machine, 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