Aluminum plating method for plastic film

Abstract

The invention relates to a plastic film aluminum plating method. The method comprises the following steps: opening a vacuum case, installing a plastic film onto a reel, fixing the reel onto a film passing tape for automatic film passing, and entering a production preparation status; arranging N carbon diboride evaporation boats in the vacuum case; arranging N discs of common aluminum wires with the purity above 99.99 percent in the vacuum case; closing the vacuum case; carrying out air extraction to make the vacuum degree in the vacuum chamber reach above 3.5*10mbar; setting the temperature of a filming drum at 0 to 2 DEG C; setting the working temperature of the evaporation boats at 1,300 to 1,350 DEG C; setting the wire feeding speed of the aluminum wires at 200 mm / min to 280 mm / min; setting the reeling speed of the plating film at 9.5 m / s to 13 m / s; turning on a plasma device; setting the thickness of an aluminum layer at 3.5 omega / (300) to 54 omega / (60); and observing the evenness of an aluminum coating layer and controlling the evenness within + / -2 percent as required. The error of the thickness and evenness of the aluminum coating layer is improved from + / -10 percent to + / -3 percent, and therefore the requirements on the product quality are met.

Description

technical field [0001] The invention relates to a production method of a vacuum aluminum plating material. Background technique [0002] The physical properties of the plastic film itself and its transparency determine that it does not have a conductive function. [0003] Therefore, evenly plate a layer of metal material—aluminum on the surface of the polyester film, and after 24 hours of solidification of the metal aluminum molecular structure after production, the product will have a strong conductive function. The following is a brief introduction to the product: [0004] Electronic shielding aluminized film: As a pillar industry in the 21st century, the electronics industry is playing an increasingly important role, and as the "protector" of electronic products - electronic shielding packaging bags are an indispensable product in electronic products . Then the electronic shielding packaging film is mainly designed and produced according to the physical principle of Fa...

AI Technical Summary

Problems solved by technology

[0005] (1) After the PET film is vacuum aluminized, a metal layer is formed on the surface, so a conductive network is formed, but if the ordinary vacuum aluminized: (1) affects the visibility of the package; (2) shielding The performance does not meet the requirements of 1 point <46dB electromagnetic wave

Therefore, if the thickness of the vacuum aluminum plating is uneven, the shielding performance cannot be guaranteed at all.

[0006] (2) If the uniformity of vacuum aluminum plating is not good, it will cause the aluminum layer of the PET film to be transparent on one side and translucent on the other side. Then according to the principle of Faraday electric cage shielding, there will be blind spots on the surface of the product, resulting in If there is a void area, the shielding performance of the product cannot be guaranteed