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
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
