Features
Or polyester Polyethylene terephthalate (PET) is a high-performance, crystal clear thermoplastic made from ethylene glycol and dimethyl terephthalate (DMT). Compared with other common plastic films, PET film has higher tensile strength, excellent dimensional stability, low moisture absorption and good physical properties in a 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, as well as high-performance plastic films and sheets. It has a relatively high melting point, which makes it suitable for applications requiring autoclaving.

Due to the higher price compared with PVC, PE, PP film, it is generally considered to be a special film.

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

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

Although expensive, BOPET has found many large-scale applications requiring this stronger and dimensionally stable film. One of the main disadvantages of BOPET is its high manufacturing cost and high equipment capital investment.

Application
PET film is often an excellent choice for more demanding applications in food and non-food film applications. Key applications include microwave and medical packaging, plastic wrap, tape backing, printed films, plastic cards, solar and security window films and other protective coatings, release films, transformer insulating films and flexible printed circuits. PET is also used as aroma barrier films (eg coffee and tobacco packaging). Films of this type are sometimes metallized by vapor deposition of metals, which further improves the barrier to oxygen, water vapor, and flavor loss.

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

Mylar films are sold in a variety of types, thicknesses and widths, with properties tailored to the specific requirements of specific end-uses.

It is used for puffed food packaging, dry fruit packaging, costume, eco-bag, leather, woven fabric materials and more. In a word, suitable for various flexible packaging, laminated with other plastic film for high barrier packaging, Insulation materials like heat, water, light, acid etc.
It is also used for electronic packaging and decorative materials, lables, stickers,cosmetics and metal products. Laminated with cardboard or paperboard for top grade packaging, for waterproofing membrane protective surface.Coated with color for gift wrapping, festival decoration, metallic yarn, glitters, sequins. Survival products like survival blanket, survival tent and etc.