TYPICAL PRESSURE SENSITIVE
LABEL
MANUFACTURING PROCESS
UNIT
PROCESSE
•Silicone
Coating
•Remoisturizing
•Silicone
S Curing •Laminating
•Remoisturizing
•Adhesive Coating
•Adhesive Curing
EQUIPMENT
•
•
•
•
•
Coaters
Dryers or Ovens
Remoisturizers
Laminator
Rewinders / Unwinders
WHY REMOISTURIZE?
Low
Paper
Moisture
• W
Web
bb
brittleness
ittl
• Static electricity
buildup
• Curl
Quality & Production
Problems
WHY
REMOISTURIZE?
SOLUTIONS
SOLUTIONS
MOISTURE ABSORPTION
Moisture Absorption = f (web temp, steam density,
dwell time)
MOISTURE
ABSORBTION
MOISTURE ABSORPTION
Moisture Absorption = f (web temp, steam density,
dwell time)
MOISTURE
ABSORBTION
TECHNIQUES FOR STEAM
REMOISTURIZING
• Passive steam shower
• Enclosed
E l
d streaming
t
i steam
t
applicator
li t
• Enclosed impingement applicator
TECHNIQUES
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
• Can it p
provide the required
q
moisture?
• Is the web temperature entering the applicator
< 125 deg
g F?
• Does the unit protect against external
condensation?
• Is the unit’s fabrication robust?
• Does the unit lend itself to automatic control?
• Is the unit configurable to existing process
line?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Can it provide the required moisture?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Is the web temperature entering the applicator <
125 deg F?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Does the unit protect against external
condensation?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Is the unit’s fabrication robust?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Does the unit lend itself to automatic control?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Does the unit lend itself to automatic control?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Does the unit lend itself to automatic control?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
Is the unit configurable to existing process line ?
CRITERIA
CRITERIA FOR CHOOSING A STEAM
APPLICATOR
• Can it provide the required moisture?
• Is the web temperature entering the applicator
< 125 deg F?
• Does the unit protect against external
condensation?
• Is the unit’s fabrication robust?
• Does the unit lend itself to automatic control?
• Is the unit configurable to existing process
line?
CRITERIA
ECONOMICS
ECONOMICS