Vacuum Metalizing
Vacuum metalizing is a form of physical vapor deposition, a process of combining metal with a non-metallic substrate through evaporation. The most common metal used in the vacuum metalizing process is aluminum for a variety of reasons such as cost, thermodynamic, and reflective properties. The evaporation takes place by feeding aluminum onto heated sources or boats, which operate at approximately 1500°C (2700°F). The vacuum metalizing chamber’s atmosphere is evacuated to a vacuum level suitable for the evaporation of the aluminum wire. Upon contact with the substrate being processed, the aluminum vapor condenses and creates a uniform layer of vacuum deposited aluminum.

Vacuum Metalizing for Aesthetics
Vacuum Metalizing is done for many reasons; aesthetically it adds a unique appearance. The metalized substrate can have a highly reflective mirror like finish or be used in conjunction with other processes, like coating or laminating, to create a decorative effect. Film that has undergone vacuum metallization can also be dyed and/or coated to give the substrate a unique color. Additionally, any vacuum metalized film can be laminated to a variety of other substrates, such as leather and synthetic fabrics, to give the material a unique and high end appearance. Some additional decorative possibilities include:

• Appliance surfacing films
• Label stock for a variety of applications
• Personal care packaging
• Merchandizing

Vacuum Metalizing Function: Insulation
Vacuum metalizing is primarily used to increase functionality of a substrate. A vacuum metalized surface is ideal for insulation, mostly because of it’s increased reflectance/ radiant properties. Commercial and residential reflective insulation materials get their functionality from the metallization process. Thermal insulation systems that are used to protect space crafts are constructed of multiple layers of vacuum metalized polyimide films.

Vacuum Metalizing Function: Barrier
Another function derived from the metallization process is increased barrier properties. Metallization of a plastic substrate makes in a great moisture and air barrier. Applications include food & beverage packaging and medical applications. Furthermore, the vacuum metalizing process decreases the substrates light transmission making it an effective light barrier. The light transmission is controlled by the amount of vacuum deposited aluminum. Some functional barrier and insulation applications include:

• Aerospace thermal protection systems
• Electronic labels
• Home Décor
• Reflective Insulation
• Medical Packaging

Contact DUNMORE for More About Vacuum Metalizing
DUNMORE Corporation has been Vacuum Metalizing for nearly forty years, please contact us to find out more about metalization and related services.