With the continuous development of science and technology, aluminized PET film as a new material with a wide range of prospects for application, gradually attracted people’s attention. In this article, we will discuss in depth the processing technology of aluminized PET film and its application in different fields to provide you with comprehensive information.
Processing technology of PET film
Melting: PET pellets are fed into a heated extruder, where they are melted and homogenized into a homogenous melt.
Extrusion: The molten PET melt is then extruded through a die, forming a continuous PET film. The thickness of the film is determined by the size of the die opening.
Quenching: The extruded PET film is passed through a cooling bath to solidify it rapidly, preventing distortion and maintaining its desired dimensional stability.
Chilling and Orientation: The solidified PET film is then passed through rollers or chillers to further cool and stretch it in both the machine direction (MD) and transverse direction (TD). This process aligns the polymer chains, enhancing the film’s strength, clarity, and dimensional stability.
Slitting and Winding: The pre-stretched PET film is slit into the desired width and wound onto rolls for storage and further processing.
PET film applications
Food Packaging
Aluminized PET film has good barrier properties, which can effectively prevent the loss of water, oxygen and other substances in the food, thus extending the shelf life of food. Therefore, aluminized PET film has a wide range of applications in food packaging, including the packaging of cookies, confectionery, beverages, frozen foods, etc.
Electrical and Electronic Appliances
Aluminized PET films have good corrosion resistance and therefore have a wide range of applications in the field of electronics and electrical appliances. For example, Aluminized PET films can be used as shielding, insulation and protection layers in electrical and electronic appliances.
Building materials
Aluminized PET films are also highly regarded for their use in construction materials, especially in glass curtain walls and heat and sound insulation materials.
Industrial production
Aluminized PET films have good strength, toughness and heat resistance and therefore have a wide range of applications in industrial production. For example, aluminized PET films are used in industrial production as bag-making materials, packaging materials and anti-corrosion materials.
How to check the pass rate of Pet Film
Aluminized PET film aluminized thickness is generally 25 ~ 500nm, available optical density meter for measurement; aluminized layer uniformity is measured in the longitudinal 120m within 10 points, the thickness error is less than 10%, the horizontal measurement of 18 points, the error is less than 5%, through the above values to identify the qualification rate of the product.
Conclusion
Aluminized PET films have good performance and a wide range of applications, so they have good prospects for development in the future. With the increasing demand for food safety, electronic product performance and building energy efficiency, the application of aluminized PET films will be more extensive.