PKSC 1020 Exam 3 Questions with Complete
Solutions
vertical form fill seal V/F/F/S vs Horizontal form fill seal H/F/F/S Correct Answ_both make
a lot of pouches and seals them (big, small, medium all sizes)
-made from 2 or more substrates (laminates)
Permeability Correct Answ_volume of gas or water through specified thickness and surface
area or film over one day at standardized humidity and temperature
units used: (mL)(mil)/(m2)(24h)
@%RH and temp
The thicker the film the less permeable and the thinner the film the more permeable
Example question for permeability Correct Answ_If thickness is decreased by 1/2,
permeability is increased by 2
2 mil film w/PR of 1000 @ 1 mil PR=2000
, 0.25 mil film w/PR of 750 @ 1 mil PR=187
Thicker=less permeable
Thinner=more permeable
methods of combining materials Correct Answ_Laminating
• Wet bonding
• Dry bonding
• Hot melt
• Extrusion
Coating
Coextrusion
what is gravure coating used for Correct Answ_glossy materials like caprisons
extrusion lamination Correct Answ_-when a molten plastic is used as a "glue" to combine
substrates
wet bond lamination Correct Answ_when substrates are combined using wet glue
Solutions
vertical form fill seal V/F/F/S vs Horizontal form fill seal H/F/F/S Correct Answ_both make
a lot of pouches and seals them (big, small, medium all sizes)
-made from 2 or more substrates (laminates)
Permeability Correct Answ_volume of gas or water through specified thickness and surface
area or film over one day at standardized humidity and temperature
units used: (mL)(mil)/(m2)(24h)
@%RH and temp
The thicker the film the less permeable and the thinner the film the more permeable
Example question for permeability Correct Answ_If thickness is decreased by 1/2,
permeability is increased by 2
2 mil film w/PR of 1000 @ 1 mil PR=2000
, 0.25 mil film w/PR of 750 @ 1 mil PR=187
Thicker=less permeable
Thinner=more permeable
methods of combining materials Correct Answ_Laminating
• Wet bonding
• Dry bonding
• Hot melt
• Extrusion
Coating
Coextrusion
what is gravure coating used for Correct Answ_glossy materials like caprisons
extrusion lamination Correct Answ_-when a molten plastic is used as a "glue" to combine
substrates
wet bond lamination Correct Answ_when substrates are combined using wet glue
