Process Parameters:
CORTERRA 200 has been successfully compounded using both
single-screw and twin-screw extruders. It is not necessary to dry PTT polymer
before use in vented single-screw or twin-screw compounding machines as long as
the moisture content is less than 0.2%. However, if the moisture content is
greater than 0.2%, or the compounding equipment is not vented, it is
recommended that the polymer be dried to a moisture level below 50 ppm to
obtain optimum properties.
Typical drying equipment would include a dehumidifying air
hopper dryer with regenerative desiccant beds using the following conditions:
|
Process
|
Conditions
|
|
Drying Temperature
|
130C
|
|
Residence Time
|
4 hours
|
|
Air Dew Point
|
-40C
|
|
Minimum Air Flow Rate
|
62 liters/minute per kilogram polymer (1.0 ft3/min
per pound)
|
Typical physical properties
|
Property
|
Typical Value
|
|
Intrinsic Viscosity (IV), dl /g
|
0.92
|
|
Melting Point, C
|
228
|
|
b* color
|
4.5
|
|
L* color
|
85
|
|
Polymer Density, g/cc
|
1.35
|
|
Bulk Density, kg/m3
|
833
|
|
Weight of 100 pellets, g
|
2.4
|
|
TiO2 content, %
|
0
|
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