E Grade Purging Compound
E Grade is a purging compound for thermoplastic injection molding and extruder machines especially designed for residue-sensitive or low-temperature resins. E Grade leaves very little residue behind while facilitating color and material changes. E Grade is ideal for shutdown and sealing applications to ensure fast and clean machine start-ups. E Grade makes an excellent companion to any other ASACLEAN “scrubbing grades” to ensure maximum cleaning with minimum residue.
|Low Residue||Low Temperature|
|Resins Purged: Most commodity and engineering resins within the processing temperature range.|
|E Grade is ideal for residue-sensitive applications due to its low-residue formulation. It can be used in conjunction with other grades, as a chaser, whenever low residue is crucial|
|E||See our other grades|
|Color Changes||EX, UP, U, SX, PX|
|Material Changes||EX, UP, U, SX, PX|
|Hot Runner Cleaning||UP, U|
|Clear/Low Residue Applications||U|
|High Temperature Resins||EX, SX, PX|
|Low Temperature Resins|
|Carbon/Color Contamination||EX, U|
Processing temperature: 320°F to 530°F (160°C to 270°C)
E Grade has no minimum hot runner gate clearance requirement nor extrusion die or mesh clearance requirement.
Tips when using ASACLEAN:
|ASACLEAN does not work by chemical reaction.|
|No soak time or hold-up time is required for an effective purge|
|For maximum performance, ASACLEAN should not be diluted with other materials.|
|ASACLEAN works best with maximum agitation. Use the maximum safe screw speed and for injection molding also use maximum safe back pressure with the screw in the most forward position.|
Usage Example: Changeover from transparent orange to clear acrylic
When transitioning to clear or soft resins, it’s important not only to completely
purge out the previous resin but also to make sure that no residue is left behind
by the purging agent. Any residue can easily become a contaminant leading to
defects in parts that are molded of clear or residue-sensitive resins.
ASACLEAN E Grade facilitates residue-free color and material changes for
these types of resins.
The photos below are of color changes for molded acrylic test plates. The
comparison shows a transparent orange to clear changeover with and without the
use of ASACLEAN E Grade.