Polyester film (PET) self-adhesive is a label material based on polyester film, featuring outstanding performance and wide application. Its surface is smooth and scratch-resistant, with strong chemical stability. It is resistant to water, oil, acid and alkali, and ultraviolet rays. Even in outdoor or high-temperature environments (with a temperature resistance range of -40 ℃ to 120℃), it can maintain stable performance and is not prone to fading or deformation. It has excellent printing adaptability, supporting various processes such as offset printing and flexographic printing. The color reproduction of patterns is high and durable. At the same time, it can be flexibly die-cut into various shapes to meet the needs of irregular-shaped labels. In terms of bonding performance, when combined with different adhesives (such as permanent adhesive and removable adhesive), it can be firmly adhered to smooth surfaces such as metals, plastics, and glass, especially suitable for curved or irregular objects. Its main utility is reflected in scenarios such as industrial identification (such as equipment nameplates, circuit board labels), outdoor products (such as auto parts, building materials labels), daily chemical and electronic product packaging, etc. It can not only clearly display information for a long time, but also, with its excellent weather resistance and mechanical strength, has become the preferred material for scenarios requiring highly durable labels.