PET Film Expands into Multiple Sectors

The electronics and electrical industry is driving a surge in demand for high-performance insulating films.

(I) 5G communication technology is driving performance upgrades in insulating films.

With the full commercialization of 5G communication technology, communication equipment has significantly increased its requirements for signal transmission stability, interference resistance, and heat dissipation.

In 5G base stations, communication terminals, and other equipment, numerous electronic components rely on high-performance insulating films for electrical isolation and protection to prevent signal interference and ensure stable operation in high-frequency, high-power environments.

(II) Electric vehicles are driving growth in the insulating film market.

Electric vehicles' battery systems, motor drive systems, and electronic control systems contain numerous high-voltage electrical components, placing stringent demands on insulating materials' resistance to high voltage, high temperature, and aging. For example, motors generate significant heat and operate in a high-voltage environment during high-speed operation.

Ordinary insulating materials struggle to meet these requirements for long-term stable operation. High-performance insulating films, however, maintain excellent insulation performance and structural stability under harsh operating conditions, ensuring safe and reliable motor operation.

(Ⅲ) Smart Electronic Product Upgrades Drive Demand for Insulation Film

Smart electronic products such as smartphones, tablets, and wearable devices are becoming thinner, smaller, and more integrated. The denser layout of internal electronic components places higher demands on the dimensional accuracy, thinness, and temperature resistance of insulation films, further driving the growth of the high-performance insulation film market.

Electronic Insulation Film Market Trends and Core Applications of BoPET Film

(Ⅰ) Steady Growth in the Electronic Insulation Film Market
Data shows that the electronic insulation film market maintains an annual growth rate of approximately 8%, showing an overall steady upward trend.

(II) BoPET Film Becomes the Material of Choice in Key Applications

BoPET (biaxially oriented polyethylene terephthalate) film, with its excellent thermal and dimensional stability, has become the material of choice in key applications such as capacitors, motor insulation, and transformer insulation films. Specific applications are as follows:

Capacitor Application: As a capacitor dielectric material, BoPET film's thermal stability directly impacts the operating temperature range and service life of the capacitor. It maintains stable physical and chemical properties at high temperatures and is not susceptible to thermal deformation or aging.

Its excellent dimensional stability ensures that the dielectric layer thickness and dimensions do not change significantly over long-term capacitor use, maintaining key performance parameters such as capacitance.

Motor Insulation Application: Motor operation generates high temperatures and electromagnetic vibrations. As a motor winding insulation material, BoPET film offers excellent temperature resistance and mechanical strength, resisting damage to the insulation layer caused by high temperatures and the effects of vibration on the insulation structure. It effectively isolates electrical connections between windings and between the winding and the core, preventing short-circuit failures.

Transformer Insulation: Transformers are crucial in power transmission and distribution. As a key component of their insulation structure, BoPET film can improve transformer insulation performance, withstand the high voltages and temperatures generated during operation, reduce insulation breakdown accidents, and extend transformer service life.

Important Applications of PET Film in the Photovoltaic Industry

(I) PET Film as the Core Substrate for Solar Cell Backsheets

In addition to the electronics and electrical industries, PET film is indispensable in the photovoltaic industry and serves as the core substrate material for solar cell backsheets. Located on the back of a photovoltaic module, the solar cell backsheet primarily protects the solar cells, provides mechanical support, blocks moisture and oxygen, and provides electrical insulation. Its performance directly impacts the module's power generation efficiency and service life.

(II) Core Advantages of PET Film for Solar Cell Backsheets

Mechanical Support Performance: PET film offers high mechanical strength and toughness, capable of withstanding external forces such as stretching, bending, and impact during the production, transportation, installation, and use of photovoltaic modules. It protects the internal solar cells from mechanical damage and maintains the module's structural integrity.

Barrier Performance: PET film effectively blocks moisture and oxygen from entering the interior of photovoltaic modules. Solar cells are sensitive to moisture and oxygen. The intrusion of these two elements can lead to performance degradation, such as failure of the cell's passivation layer and electrode corrosion. The barrier properties of PET film can slow the permeation of these elements, providing a dry and stable operating environment for the cells and extending the life of the modules.

Electrical insulation: PET film exhibits excellent electrical insulation properties, effectively isolating the internal current of photovoltaic modules, preventing leakage, ensuring electrical safety, and preventing accidents caused by electrical failures.

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