Research on Vacuum Silver Plated PET Packaging Film

In modern packaging materials, polyethylene terephthalate (PET) is widely used in the field of food packaging due to its excellent mechanical properties, transparency, and barrier properties.Vacuum silver plating technologyThe introduction not only gives PET film a silver metallic texture, but also further enhances its barrier, temperature resistance, and antibacterial properties. Therefore, vacuum silver plated PET film not only improves the performance of packaging materials, but also provides a new solution for the quality and preservation of food.

Materials and methods for vacuum silver plated PET packaging film

material

Vacuum silver plated PET packaging filmThe substrate is usually made of PET film with high transparency and good mechanical strength. The molecular structure formed during the stretching process of PET film endows it with excellent heat resistance and chemical stability. The material of the silver plating layer is mainly metallic silver, which has good conductivity, reflectivity, and antibacterial properties.

method

Vacuum silver plating technology is the process of depositing silver atoms onto the surface of PET film using physical or chemical vapor deposition in a high vacuum environment. This process includes the following key steps:

1. Substrate preparation: Firstly, clean the PET film to remove surface oil stains and impurities, ensuring the adhesion of the coating.
2. Vacuum environment establishment: Establish a high vacuum environment in the vacuum coating machine to reduce the interference of gas molecules on the coating process.
3. Silver plating process: Heat and evaporate the silver source to form a deposition layer of silver atoms on the surface of PET film.
4. Coating solidification: By cooling or post-treatment processes, the silver plating layer is tightly bonded to the PET film.

Advantages and Characteristics of Vacuum Silver Plated PET Packaging Film

1. High barrier properties

The silver plating layer significantly improves the barrier performance of PET film, especially in gas barrier, which can effectively reduce the permeability of oxygen and water vapor and extend the shelf life of food.

2. Beautiful and antibacterial

Vacuum silver plated PET filmIt has a silver metallic luster, a high-end and atmospheric appearance, and the silver plating layer also has certain antibacterial properties, which can inhibit bacterial growth and maintain food hygiene.

3. Temperature resistance and chemical resistance

The silver layer has excellent temperature resistance and can withstand high temperature cooking and other processing processes. At the same time, it is stable to most chemicals and not easily reacted with food.

4. Lightweight

Compared with traditional metal packaging materials, vacuum silver plated PET film is lighter, which is beneficial for reducing transportation costs and environmental burden.

Application of Vacuum Silver Plated PET Packaging Film in Food Packaging

1. Exquisite packaging

Vacuum silver plated PET film is commonly used to make the outer packaging of food, such as exquisite packaging of leisure foods such as chocolate, biscuits, and dried fruits, to enhance the product's grade and market competitiveness.

2. High temperature sterilization packaging

For foods that require high-temperature sterilization treatment, such as canned and some ready to eat foods, vacuum silver plated PET film can be used as an inner packaging material to effectively block the impact of high temperature and high pressure on the food during the sterilization process.

3. Extended shelf life

The high barrier properties of vacuum silver plated PET film can significantly extend the shelf life of food, especially suitable for foods that are sensitive to oxygen and water vapor.

conclusion

Vacuum silver plated PET packaging filmAs an advanced packaging material technology, it has brought revolutionary changes to the field of food packaging. Its excellent barrier properties, aesthetics, antibacterial properties, and temperature resistance not only enhance the performance of packaging materials, but also provide strong support for the quality and preservation of food. With the continuous advancement of technology and the increasing market demand, the application fields of vacuum silver plated PET packaging film will become more extensive and become an important development trend in the future food packaging industry.