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Vacuum coating and metalizing process

Vacuum coating and metalizing is the process of adding a thin film of aluminum or another coating to a material.

In principle, the process calls for the evaporation of the coating material inside a vacuum chamber, after which it condenses onto a web of the substrate as it passes through.

Paper and film metalizing is utilized in the packaging and decorative market segments. The barrier and decorative markets are noted for their wide variety of products from beer labels to chip bags.

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Vacuum coating machines

A vacuum coater, also referred to as a vacuum metallizer or barrier coating machine, consists of a vacuum chamber that has been evacuated to, typically, 0.0005 mbar.

Inside this chamber, aluminum wire is fed onto individual, resistance-heated inter-metallic evaporators, where the aluminum becomes molten and evaporates.

The flexible substrate, supported on a chilled process drum, passes over the evaporation source at speeds of up to 1000 m/min. The aluminum vapor condenses onto the substrate and so creates the coating layer.

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Plasma treatment

A plasma treatment unit can also be used as part of a vacuum coater system in order to enhance metal adhesion and/or to improve the substrate's qualities as a barrier against oxygen and water vapor transmission. Here, the surface of the web is hit by plasma just prior to the coating process.

The plasma is formed by applying an electrical voltage to a gas, or combination of gases. In addition to removing moisture and other contaminants, plasma treatment acts to increase the number of nucleation sites by the introduction of polar groups, resulting in a coating with a homogeneous surface morphology and fewer defects.

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Applications

The vacuum coater is used to deliver aesthetic improvements to flexible substrates and/or to reduce oxygen and water vapor transmission to levels similar to that of glass and metal containers. This delivers improved packaging performance, extends pack shelf life, and maintains the quality of the packaged product.

The process can also be used to produce substrates that conduct electricity, save energy, control light transmission or reflection, and which can even help prevent counterfeiting or theft.

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江森电子一直专注于薄膜和薄膜电容器的制造,与人类生活息息相关的薄膜电容器,可再生能源和环保的先进技术应用是我们工厂的主要重点。 我们一直在成长,因为我们始终以高标准的24/7生产将客户满意度放在首位。凭借我们在亚洲市场的领先地位,我们随时准备为您提供最好的产品和合理的价格保证。

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