SEAL AQUA AS-1600 - Manual (Page 18)

Section 3. Troubleshooting
17
The following table lists problems that may occur when using the AS1600 Liquid Laminator.
Recommended corrective actions are provided for all commonly encountered problems.
Problem / Symptom Causes Corrective Action
Very thin coating Sealant is diluted with water Remove old coating and refill
with new
Heavy coating Weight of coating in application
area causes material to sag and
not get wiped off properly Increase break tension on the
Transition and Tension Idlers
Dirty Draw Down Bar Clean the Draw Down Bar
Overly thinned coating can dry
quickly and streak Remove old coating and refill
with new
Streaked finish
Contaminated coating can
clump up and streak Remove old coating and refill
with new
Media has been overheated Cool down heaters or speed up
drive
Unwind to take-up alignment is
poor Realign the media
Media wrinkles
Insufficient back-tension
Increase brake tension on
Transition and Tension Idlers
Telescoping media Roll-feed to take-up alignment is
poor Realign the media
Coated Media is wet coming
out of the dryer panel Insufficient drying •
Reduce web speed
•
Increase the heat panel
temperature
Media surface is contaminated Ensure media is free form
contaminates
Sealant is contaminated Remove old coating and refill
with new
Non-wets (areas where the
sealant has not adhered to the
film or paper)
Media or inks and sealant are
incompatible Use a compatible media
Media is too hot and is
beginning to melt Cool down the heaters and/or
speed up the drive Distortions in media
Media is hot and back tension is
too high Decrease back tension
Cracking effect in the coating With thick coatings a high heat
setting can cause evaporation to
occur too rapidly causing this
effect •
Lower heat controller
setting to 600
o
F
Surface impressions occur at
the take-up roll Insufficient drying •
Check web temperature
with IR gun
•
Reduce web speed
•
Increase heater panel
temperature
Sealant in tank develops a
skin over its surface Sealant has been left without
agitation for too long and has
begun to dry out Pull skin off the top of the
sealant and add a small amount
of water (1 cup) and mix into
sealant thoroughly.