What are the advantages of PET film?

PET film （i.e. polyethylene terephthalate film） is a high-performance polymer material. With its excellent comprehensive performance, it has become an "all-round player" in the fields of packaging, electronics, and construction. Its unique material properties can not only meet the basic functional requirements, but also continuously expand its application functions in the process of technological upgrading, becoming an indispensable material in modern industry.

Excellent mechanical properties, both strength and toughness

The tensile strength of PET film is 3-5 times that of polyethylene film. It can withstand large tensile forces without breaking easily. In the packaging field, it can effectively resist extrusion and friction during transportation. At the same time, it has excellent toughness, with an elongation at break of 100%-300%. It is not easy to crack after folding or bending. It is especially suitable for scenes that require repeated folding, such as the protective film of book covers and the lining of folding screens of electronic products. This "strong but not brittle" characteristic enables it to significantly improve the durability of products when replacing traditional materials such as cellophane and PVC film.

Outstanding chemical stability, adaptable to complex environments

PET film has excellent chemical corrosion resistance, strong resistance to acids, alkalis, organic solvents, etc. When packaging cosmetics, detergents and other chemical products, it will not swell or degrade due to contact with the contents. It has a wide temperature resistance range and can maintain stable performance in an environment of -70℃ to 150℃。 It can be used reliably in high-temperature sterilization scenarios such as pasteurization of food packaging, or low-temperature refrigeration environments. In addition, PET film is not easy to absorb water, with a water absorption rate of only 0.1%. It can still maintain dimensional stability in a humid environment and avoid wrinkling, deformation and other problems, which is crucial for the packaging of precision electronic components.

Excellent optical performance, meeting high-definition display requirements

The light transmittance of transparent PET film can reach more than 90%, and the haze is less than 2%. It can clearly show the appearance of the packaged items and is widely used in window packaging of food and gifts. Specially treated PET film can also have excellent optical functions, such as brightening film can increase the brightness of LCD screens, and diffusion film can make light evenly distributed, playing a key role in display devices such as mobile phones and TVs. Compared with glass, PET film weighs only 1/5 of the same volume of glass and is not easy to break. It has more advantages in scenarios that require lightweight and drop resistance （such as car displays）.

Strong processing adaptability and large space for functional expansion

PET film can be modified through a variety of processes to derive a variety of functional products. After coating, a sticky PET tape can be obtained, which is widely used to fix electronic components; the aluminized PET film formed after vacuum aluminization has both light-shielding and metallic texture, and is often used for food packaging such as tea and coffee that need to be kept away from light; PET film with flame retardants added can meet the fire protection requirements in the construction and automotive fields. In addition, PET film is easy to print, has strong ink adhesion, can achieve high-definition pattern printing, and performs well in the fields of labels and decoration.

Balance between environmental protection and economic performance, in line with sustainable development

PET film is a recyclable material, which can be converted into recycled PET raw materials through physical or chemical recycling processes to reduce resource waste. Compared with non-degradable PVC film, its environmental protection properties are more in line with policy requirements such as the "Plastic Restriction Order". In terms of cost, PET film has high production efficiency and its cost is lower than that of nylon film, aluminum foil and other materials when applied in batches. It can effectively control the company's raw material expenditure while ensuring performance.

From food packaging cling film, insulation film for electronic products, to explosion-proof film in the construction field and decorative film in the automotive industry, PET film continues to penetrate into various industrial links with its comprehensive advantages of "high strength, high transparency, easy processing and multiple adaptation". With the upgrading of environmental protection technology and the breakthrough of functional modification technology, PET film will show its value in more high-end fields and become a model of the combination of green manufacturing and high-performance materials.