Detailed Explanation of PET Film Materials

PET film material is one of the most common materials in life, such as beverage bottles and mineral water bottles. Do you know what PET material is? What are the classifications of PET? What are the characteristics of PET film?

This article will explain the main problems of PET film in detail and help you understand the material and use of PET film.

What Is PET Film?

PET film, namely Polyethylene Terephthalate, is a high-performance plastic film. PET film material is a fine processing of PET, made by extrusion technology and biaxial stretching processes.

Advantages of PET film:
① It has good transparency, light transmittance of not less than 92%, and is glossy.
② Airtightness and fragrance retention.
③ PET film has excellent mechanical properties, which are manifested in toughness, high tensile strength, and impact strength; and good strength, stable size, suitable for secondary processing.
④ PET film also has excellent heat resistance, cold resistance, good chemical resistance, and oil resistance.

Disadvantages of PET film:
① Not resistant to strong alkali.
② Easy to carry static electricity, anti-static is an important research and development topic.
③ Moderate moisture resistance and moisture permeability decrease at low temperatures.

Mylar PET Film Types

01 PET High Glossy Film

PET high gloss film has excellent physical and mechanical properties of ordinary polyester film and also has excellent gloss.

02 PET Film

PET has good transparency, low haze, and high gloss. It is mainly used for high-end vacuum aluminum-plated products. After aluminum plating, the film has a mirror surface and has a good packaging decoration effect; it can also be used for laser anti-counterfeiting base film, etc.

03 PET Transfer Film

PET transfer film, also known as thermal transfer film, is characterized by high tensile strength, good thermal stability, low thermal shrinkage, smooth and clean surface, good peelability, and can be used repeatedly.

04 PET Reflective Film

PET reflective film has excellent optical properties, a flat and smooth surface, good thermal stability, small shrinkage, and light aging resistance. PET reflective film is used in billboards with reflective requirements, traffic reflective signs (reflective road signs, reflective isolation belts, reflective license plates), reflective police uniforms, industrial safety signs, etc.

05 PET Chemical Coating Film

In order to improve the surface properties of PET film, corona treatment is usually used to increase the surface tension of the film. However, the corona method has problems such as timeliness, and the tension of the film after Corona treatment is easy to decay. However, the chemical coating method does not have such problems, so it is favored by the printing industry and the aluminum plating industry.

06 PET Antistatic Film

PET antistatic film is made by adding some antistatic agent to PET film to form a very thin conductive layer on the surface of the film, improve the surface conductivity, and make the generated charge leak as quickly as possible. Generally, the surface resistivity of the antistatic film is required to be ≤10 to the 9th to 11th power ohm.

07 PET Heat Sealing Film

In order to solve the heat sealing problem of PET film when it is used for commodity packaging, a three-layer co-extruded heat-sealable PET film has been developed by modifying the PET resin and using a die head with an A/B/C three-layer structure. This heat-sealable PET film has a heat-sealable layer on one side, so it can be directly heat-sealed and is very convenient to use. Heat-sealable PET film can be widely used in the fields of packaging of various commodities and card protection films.

08 PET Heat Shrink Film

PET heat shrink film is a new type of heat shrink packaging material. It is easy to recycle, non-toxic, odorless, has good mechanical properties, and is especially environmentally friendly.
Characteristics of heat-shrinkable polyester film: It is stable at room temperature, shrinks when heated (above the glass transition temperature), and shrinks by more than 70% in one direction.

What Is PET Film Used For

Auto parts: PET can be used to manufacture certain auto parts, such as switchboard covers, ignition coils, various valves, exhaust parts, distributor covers, metering instrument covers, small motor covers, etc.

Film sheets: PET is used to produce packaging materials for food and medicines, high-end packaging materials for textiles, precision instruments, and electrical components, as well as substrates for audio tapes, video tapes, film films, computer floppy disks, metal coatings, and photosensitive films.

Engineering plastics: PET, as an engineering plastic, is widely used in electronics, automobiles, machinery, and other fields. For example, it is used to manufacture connectors, coil bobbins, integrated circuit housing, capacitor housings, transformer housings, TV accessories, tuners, switches, timer housings, automatic fuses, motor brackets, and relays.

Packaging materials: PET is widely used to manufacture various packaging materials, including carbonated beverage bottles, mineral water bottles, edible oil bottles, beer bottles, condiment bottles, medicine bottles, cosmetic bottles, etc.

Fiber products: PET is also the main raw material for synthetic fibers (such as polyester), used in the textile industry to produce clothing, household items, etc.

Other applications: PET can also be used to make containers, sheets, baking-resistant food containers, etc.

Aluminized PET Film

Aluminized PET film is a barrier film vacuum aluminizing process formed by depositing a thin layer of aluminum atoms on high-quality PET film. It has a bright metallic luster, excellent gas and light barrier properties, and good moisture resistance.

Aluminized film has good reflectivity for ultraviolet and infrared rays and can block ultraviolet rays. At the same time, it can improve the oxygen barrier property of the film. It has a moisture-proof effect and metallic luster.

Widely used in food packaging, industrial tobacco packaging, lamination, printing, self-adhesive, etc. Suitable for various high-end tobacco and alcohol packaging, gift boxes and other gold and silver cardboards, etc., can be used for milk powder, tea, medicine, food, and other packaging and trademarks, as well as laser anti-counterfeiting materials.

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