U Grade Purging Compound

U Grade is a versatile, HIGH-PERFORMANCE purging compound especially suited for color and material changes for thermoplastic injection molding and extrusion machines. U Grade has a wide service temperature range encompassing most commodity, engineering, and super-engineering resins, making it unnecessary for multiple grades. U Grade is also recommended for hot runner cleaning as well as sealing and shutting down machines to prevent carbon on start-ups.

arrow High Performance General Purpose arrow Styrenic-Based
arrow Resins Purged: Most commodity and engineering resins within the processing temperature range.
arrow U Grade’s cleaning power approaches that of our strongest scrubber, EX Grade, but without the glass filler. It is ideal for applications that require higher detergency while maintaining lower residue.
U See our other grades
applications Color Changes checkmar EX, UP, HPE, SX, PFPX2
Material Changes checkmark EX, UP, E, SX, PF, PX2
Hot Runner Cleaning checkmark UP, HPE, PF
Shutdown/Sealing checkmark UP, HPE, PF
Clear/Low Residue Applications E
High Temperature Resins SX, PF, PX2
Low Temperature Resins E
Carbon/Color Contamination checkmark EX, PX2

Processing temperature: 350°F to 680°F (180°C to 360°C)
U Grade requires a 0.020″ (0.5 mm) clearance for hot runner gates and extrusion dies; 100 mesh is required for extrusion screen packs.

Tips when using ASACLEAN:

arrow ASACLEAN does not work by chemical reaction.
arrow No soak time or hold-up time is required for an effective purge
arrow For maximum performance, ASACLEAN should not be diluted with other materials.
arrow 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.