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10.0 SUPPLIED PET (POwDER)
10.1 TESTING PRINCIPLE
The polymer must be ground to a powder using the polymer grinder then dried using the drier and
vacuum pump, all of which are optional extras.
Note that a quantity of liquid nitrogen is required to assist with the grinding process, so suitable
storage and handling procedures are required.
When the polymer is dry, it MUST be transferred to the PET Plus barrel using a procedure that
ensures that the polymer does not come into contact with any external air.
NoTE: Drying time is a function of both temperature and vacuum.
A <0.1mm Hg vacuum is essential.
10.2 POLYMER DRIER
The Polymer Drier has been designed for drying PET and other hygroscopic materials and
incorporates the following features:
1.
A temperature controlled heated block that has been machined to hold and heat six sample
phials. The temperature controller can control the temperature from ambient to 200ºC (±2ºC).
2.
Six quick release valves at the top of the unit to connect each sample phial to the vacuum
supply.
3.
Two "Storage" or "Parking" areas to hold six sample phials. These areas are at the side of the
heated block but are not heated. They are provided to allow the dried samples to be stored
under vacuum until required.
4.
An On/Off Switch for the Vacuum Pump.
5.
A timer, settable from seconds to hours, with an audible alarm. This is mainly for use when
drying polymer powder.
Shown: Poymer drier
PET Plus User Manual
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