What is polyester film

What is polyester film
Polyester (PET) film is a versatile plastic with a wide variety of uses. PET material has good chemical resistance and is tough and durable compared to other commodity resins with similar properties and price ranges. This material can also be die cut or laser cut to efficiently create products with consistent designs.

The dimensional stability of polyester films allows them to be used in a variety of applications including face coverings, laminates, thin film circuits, electronic insulation, carrier films and various graphic arts applications.

Certain polyester films are available as FDA approved films. This property provides a huge benefit for applications such as face masks used in areas where disinfection and cleaning are critical.

Easiest to produce in gauges from 48 (1/2 mil) to 0.014, PET film can be printed on one or both sides for easy printing, slip-finished for easy handling, and available in ultra-clear, clear, Hazy and White depends on your specific needs.

Metallized coated matte PET film

characteristic
Polyester or polyethylene terephthalate (PET) is a high-performance, crystal-clear thermoplastic made from ethylene glycol and dimethyl terephthalate (DMT). Compared with other ordinary plastic films, PET film has higher tensile strength, excellent dimensional stability, low moisture absorption, and maintains good physical properties in a fairly wide temperature range. It also has excellent UV resistance, excellent electrical properties, good optical clarity, high gloss and good gas barrier properties, but only moderate moisture resistance. It is an ideal film for high-quality printing and lamination, and a good choice for high-performance plastic films and sheets. It has a relatively high melting point, which makes it suitable for applications requiring high temperature sterilization.

Due to its higher price relative to PVC, PE and PP films, it is often considered a specialty film.

PET can be metallized to improve gas barrier properties and is suitable for applications requiring long product shelf life. PET films are ideal for a wide range of industrial, electronic and automotive applications. It is fully recyclable and can be easily reprocessed into many other products for many different applications. However, unlike paper and other cellulose products, PET does not break down easily. However, biodegradable additives can enhance the biodegradability of this plastic without affecting the physical properties.

The most important polyester film is biaxially oriented PET or BOPET. 1 Compared with other common plastic films, it has better retention of physical properties in a fairly wide temperature range of about -70°C to 100°C.

Despite the higher price, BOPET has found that many high-volume applications require this stronger and dimensionally stable film. A major disadvantage of BOPET is the higher manufacturing cost and higher equipment capital investment.

Metallized and coated PET film

Application field
PET films are often an excellent choice for more demanding applications in food and non-food film applications. Key uses include microwave and medical packaging, plastic wrap, tape backing, printed films, plastic cards, protective coatings such as solar and safety window films, release films, transformer insulating films and flexible printed circuits. PET is also used as an aroma barrier (e.g. coffee and tobacco packaging). Films of this type are sometimes metallized by metal vapor deposition, which further increases the barrier properties against oxygen, water vapor and aroma loss.

Due to low odor, high chemical resistance and inertness, many PET grades are suitable for packaging applications under FDA regulations.

Polyester films are sold in various types, thicknesses, widths, and properties tailored to meet the specific requirements of a particular end use.

Weshare-china offers a wide range of film products in different grades, textures and transparencies. Contact us today to discuss your polyester film needs and our dedicated film experts will help you choose the right solution for your application.