General Instructions Regarding Working with Application Materials
A-2
P/N 7135268B
E 2008 Nordson Corporation
PURBlue EC
Vapors and Gases
Ensure that vapors and gases do not exceed the prescribed limits. If neces-
sary, exhaust vapors and gases and/or provide sufficient ventilation of the
work space.
Substrate
The substrate should be free of dust, grease and moisture. The suitable ma-
terial, optimum working conditions, and possible pre-treatment of the sub-
strate must be determined by testing.
Processing Temperature
When materials require heating, adherence to the prescribed processing
temperature is imperative to ensure the quality of the application. It may not
be exceeded! Overheating can cause material coking or cracking, resulting
in malfunctioning or unit failure.
Material should always be melted gently. Extended, unnecessary tempera-
ture load should be avoided. The temperature should be reduced during
breaks in work. The temperature in the tank should be attuned to the mate-
rial consumption. Thus it is close to the prescribed processing temperature
for high material consumption and lower for lower consumption.
When materials are processed cold, take into consideration the shear heat
and the ambient temperature; cool if necessary.
Important Note for Polyurethane Materials (PUR)
When processing polyurethane materials (PUR), the following additional
instructions must be followed:
S When the maximum level of harmful substance concentration is ex-
ceeded, use a gas mask and air purifying equipment.
S During downtime or breaks, reduce the temperature and cover the
nozzles of the application heads with Vaseline or submerge in suitable
oil.
S Before the application system is shut down for a longer period of time,
rinse it with a suitable cleaning agent. Use only a cleaning agent recom-
mended by the material manufacturer.
S Close open material connections so that they are airtight.
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