You may not have heard of PET release film, but it has long permeated daily life: mobile phone screen production, lithium battery packaging, food label pasting... This seemingly ordinary film is actually the "unsung hero" behind the upgrading of industries such as electronics and new energy.

I. What is it?

PET release film, the full name of which is polyethylene terephthalate release film, is a kind of polymer material with excellent physical and chemical properties. With its excellent transparency, heat resistance, cold resistance, chemical resistance and oil resistance, it plays an important role in multiple fields such as printing, electronics, electrical insulation, industrial films and packaging decoration. In recent years, with the continuous advancement of technology and the increasing awareness of environmental protection, PET release films have also been greatly improved and expanded in terms of performance and application.

PET release film is essentially a kind of "anti-sticking plastic film", made by coating silicone oil or fluorine materials on the surface of PET plastic. Its core function is to make materials such as tape and protective film adhere firmly and be easy to tear off.

Diverse thicknesses: from 0.015 millimeters as thin as a hair to 0.25 millimeters as thick, customizable production is available.

Performance key: Release force (ease of tearing) is classified into light (such as post-it note backing paper), medium (ordinary adhesive tape backing film), and heavy (industrial strong adhesive tape) levels.

Ii. Technological Upgrade: More durable and more environmentally friendly

1. Anti-static: During the production of mobile phone screens, anti-static films can prevent dust from adhering and increase the yield of qualified products.

2. High-temperature resistance: The new material can withstand a temperature of 200℃ and is suitable for the hot-pressing process of lithium battery electrode sheets.

3. Environmental protection transformation: Some enterprises have recycled plastic bottles into PET base materials, reducing costs by 40%.

Iii. Ubiquitous Applications in life

Electronic devices

Mobile phone screen: Protect the OLED panel from being scratched during transportation and leave no residue when torn off.

Circuit board: As a carrier, it ensures that the precise circuits do not deviate during lamination.

2. New energy

Lithium battery: Wrap the electrode plates to prevent the electrolyte from corroding and extend the battery life.

3. Daily necessities

Food label: Made of food-grade silicone oil, it will not contaminate the packaging when the label is removed.

Medical adhesive tape: Ensure that the tape is sterile and easy to tear in sterilized packaging.

4. Printing industry

In the printing industry, PET release film is an indispensable auxiliary material. It is mainly used in high-end vacuum aluminum-coated products, such as aluminum-coated cardstock, etc. These products have a bright color and a strong metallic feel, which adds the finishing touch to the beautification of the goods. PET release film is also widely used in the packaging decoration field, such as food packaging and pharmaceutical packaging. Its excellent barrier performance and printability make the packaged products more beautiful and practical. In addition, during the printing process, PET release film can also protect the printed patterns and prevent ink adhesion, thereby enhancing the quality of printed products and production efficiency.

5. Others

In addition to the above-mentioned industry applications, PET release films also have extensive applications in the field of composite materials. In the lamination, compression molding, hand lay-up molding and other processes of composite materials, PET release film serves as an isolation layer between the pre-impregnated material and the mold, effectively preventing the pre-impregnated material from adhering to the mold before curing, ensuring the surface smoothness and integrity of the composite material. Meanwhile, PET release film also features excellent high-temperature resistance and chemical stability, capable of withstanding the high-temperature and high-pressure environment during the composite material molding process, as well as the chemical effects of resins, ensuring the quality and stability of the composite materials.

Iv. Future Trends: Thinner and greener

1. Ultra-thinning: 0.015mm ultra-thin films are used in micro-sensors, promoting the miniaturization of electronic products.

2. Circular economy: Waste films can be recycled and remade into food-grade plastics, reducing resource waste.

The application of PET release film is far from being limited to the above. Now and in the future, environmental awareness will only become stronger and stronger, and the environmental performance of PET release film will also receive more and more attention. Traditional release film materials are often difficult to degrade, causing certain pollution to the environment. PET release film, on the other hand, has excellent recyclability and degradability, which is in line with modern environmental protection concepts. In recent years, some enterprises have also begun to develop environmentally friendly PET release films, such as using bio-based materials and adding degradable additives, further enhancing the environmental performance of PET release films.

PET release film will play a more important role in the printing and composite materials industry. With the continuous improvement of environmental awareness and the continuous progress of technology, the performance and application fields of PET release film will be further enhanced and expanded. Meanwhile, with the intensification of market competition and the continuous changes in customer demands, PET release film enterprises also need to constantly innovate and forge ahead to meet the demands and challenges of the market. We have every reason to believe that in the near future, PET release film will become a brilliant pearl in the printing and composite materials industry, making greater contributions to the development and progress of the industry.

Although PET release film may seem insignificant, it is a "necessity" in modern industry. With technological iteration and environmental protection demands, it is transforming from traditional consumables to high-tech materials. Meanwhile, PET release film, as an emerging material, is playing an increasingly important role in the printing and composite materials industry. With the continuous improvement of environmental awareness and the continuous progress of technology, the market prospects of PET release film will be even broader. We have every reason to believe that in the future development, PET release film will make greater contributions to the development and progress of the industry. In the future, smarter and greener products will help "Made in China" move towards high-end.