Metalized PET Film

Packing, Lamination film

1500-2000mtr

Roll

Foil

0.01mm

Yes

Standard

8-12

1.41

24000

India

Metallized polyester film, often referred to as Met PET film, is a highly versatile material created by coating a polyester (PET) film with a thin layer of metal, most commonly aluminum. This process significantly enhances the film\'s properties, making it suitable for a wide range of applications.
Manufacturing Process
The metallization process typically involves physical vapor deposition (PVD) in a vacuum environment. Here\'s a general overview:
* Polyester Film Base Selection and Pre-treatment: A high-quality polyester film is chosen as the base. It then undergoes a thorough cleaning process to remove impurities and is often subjected to a corona treatment to increase its surface energy, ensuring better adhesion of the metal.
* Vacuum Chamber: The pre-treated polyester film is unwound in a vacuum chamber.
* Metal Evaporation: Aluminum (or other metals like nickel, chromium, or even gold/silver for specialized applications) is heated to its melting point and evaporated.
* Condensation: The evaporated metal vapor condenses as a very thin, uniform layer onto the cooler surface of the moving polyester film. This layer is incredibly thin, often in the range of nanometers.
* Rewinding: The metallized film is then rewound, and the process continues.
This process allows for precise control over the thickness and uniformity of the metal coating.
Properties and Advantages
Metallized polyester film combines the inherent properties of polyester with the added benefits of the metallic layer:
* Excellent Barrier Properties: The metal layer acts as a highly effective barrier against moisture, oxygen, gases, and odors, which is crucial for extending the shelf life of packaged goods. It significantly reduces the diffusion of these elements through the film.
* Reflective and Aesthetic Appeal: The metallic coating provides a glossy, reflective, and attractive appearance, similar to aluminum foil but at a lower cost and weight. This makes it ideal for decorative purposes and premium packaging.
* Mechanical Strength and Durability: It retains the toughness, tensile strength, tear resistance, and dimensional stability of the base polyester film.
* Thermal Stability: It exhibits good thermal stability, making it suitable for various processing conditions.
* Light and UV Protection: The metallic layer provides excellent protection against light and UV radiation, which can degrade sensitive products.
* Electrical Properties: It can be used for electromagnetic shielding and insulation in electronic applications due to its reflective and low transmittance properties.
* Printability: Metallized PET films can be printed with high quality using various printing processes, allowing for attractive graphics and branding.
* Cost-Effective: It offers a more cost-effective alternative to aluminum foil laminates for many applications while providing comparable barrier properties.
Common Uses
The unique combination of properties makes metallized polyester film suitable for a wide array of applications across various industries:
* Packaging Industry:
* Flexible Packaging: Used for food packaging (e.g., snacks, coffee, spices, confectionery), pharmaceuticals, and personal care products due to its barrier properties and attractive appearance.
* Labels and Pouches: Enhances the visual appeal and protective qualities of labels and stand-up pouches.
* "Bag-in-Box" applications: For packaging liquids like wine or juices, especially those requiring high chemical resistance.
* Decorative Purposes:
* Balloons (Mylar balloons): Known for their shiny, metallic look.
* Gift Wraps, Ribbons, and Glitter: Adds a shimmering effect.
* POP (Point-of-Purchase) Displays: Creates eye-catching promotional materials.
* Electronics Industry:
* Flexible Printed Circuits: For its electrical insulation and reflective properties.
* Electromagnetic Shielding: Prevents interference and maintains signal integrity in electronic devices.
* Capacitors: As a dielectric material.
* Insulation: Used in reflective insulation and light control applications.
* Automotive and Industrial: For automotive trim, reflective shielding, and graphic arts applications.
While metallized polyester film offers many advantages, it\'s worth noting that while it significantly improves barrier properties, it may not always match the absolute barrier performance of thick aluminum foil in all situations, particularly when subjected to repeated flexing which can cause pinholes. However, ongoing advancements continue to improve its performance and applications.