Comprehensive Introduction to PET Functional Films
PET Release Film (PET Silicone Film / Heat Transfer Film)
PET release film, also known as PET silicone film, is a common material for heat transfer applications. Manufactured by coating silicone oil onto a polyester film substrate, it delivers release performance by lowering surface adhesion of PET film.
Classified by release force: light release, medium release and heavy release film.
Classified by structure: single-sided and double-sided release film.
Standard thickness ranges from 0.012 mm to 0.188 mm, which can be slit into customized sizes. After anti-static treatment, the material features excellent thermal stability, superior surface flatness and strong tensile resistance. Its temperature resistance reaches 180°C for long-term use and 200°C for short-term exposure.
It is widely used in packaging, printing, electronics, pharmaceutical (plaster base paper), sanitary paper and other industries. The consumer electronics sector accounts for 49% of market demand (2024), mainly adopted for coating electronic adhesive materials and precision die-cutting. The MLCC manufacturing industry takes up 36% as a core consumable, requiring strict surface smoothness standards. Product forms include transfer films, high-gloss films and reflective films, which play vital roles in PCB production, liquid crystal displays, optical discs and other optoelectronic products. Domestic manufacturers mostly produce mid-to-low-end products, while several enterprises have achieved mass production of high-end grades for overseas export.
PET release film is also called PET silicone transfer film. A layer of silicone oil is coated on the PET film surface to reduce surface adhesion and realize the release effect. It can be categorized into single-sided and double-sided release films. In terms of release force, there are light, medium and heavy release types.
Common thickness specifications: 0.012mm, 0.019mm, 0.025mm, 0.038mm, 0.05mm, 0.075mm, 0.1mm, 0.125mm, 0.188mm.
Manufacturers are equipped with large slitting and sheeting machines to process materials into custom rolls or sheets according to customer specifications.
PET release film is extensively applied in packaging, printing, screen printing, pad printing, nameplates, membrane switches, flexible circuits, insulating products, circuit boards, laser anti-counterfeiting, laminating, electronics, sealing material films, reflective materials, waterproof materials, pharmaceuticals (plaster base paper), sanitary paper, adhesive products, die-cutting and punching processing and other fields.