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Pksc 4300: Vacuum Coating Exam Questions And Correct Detailed Answers With Complete Solutions | Graded A+

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PKSC 4300: Vacuum Coating exam

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PKSC 4300: Vacuum Coating exam


Metallization is a form of vacuum deposition of a of aluminum


on the of a web: thin layer, surface


Why is metallization performed?: - replaces foil


improves flex-crack resistance
lower barrier cost as the # of barriers is reduced

What is the process steps of metallization?: 1) Place roll into vacuum chamber


Pull vacuum in chamber
Feed aluminum wire in ceramic boats
Melt and vaporize the aluminum wire
Move web through the aluminum cloud
Condense the web using a chill roller
Lower vacuum and remove roll

What are common films that get metallized?: - PET


OPP
OPA
occasionally OPE and PE

What happens to the permeation rate after a film is metallized?: - the Oxy and WV

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