U Grade
Purging compound for thermoplastic injection molding and extrusion applications.
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Enhanced General Purpose | |
Styrenic-Based |
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Resins Purged: Most commodity and engineering resins within the processing temperature range. | ||
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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. |
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| U | See our other grades | ||
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Color Changes |  |
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| Material Changes | |
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| Hot Runner Cleaning | |
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| Shutdown/Sealing | |
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| Clear/Low Residue Applications | |
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| High Temperature Resins | SX | ||
| Low Temperature Resins | E | ||
| Carbon/Color Contamination | |
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:
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ASACLEAN does not work by chemical reaction. |
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No soak time or hold-up time is required for an effective purge |
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For maximum performance, ASACLEAN should not be diluted with other materials. |
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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. |
"The U grade not ony keeps the tips and screws clean, but eliminates the need to pull the screw for anything but regular preventative maintenance.
"This has been a major cost savings for us.
"I estimate that for this particular product line, U grade reduced restart time by 60 percent, and eliminated unscheduled screw pulls (possibly 12 per year.
"The U grade has raised the bar for all purging compounds
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- Mike N.,
Process Technician, Injection Molder in NC
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Usage Example: Nylon color change
The photo series below shows purge piles from black to natural Nylon color changes with and without the use of ASACLEAN U Grade.
WITHOUT ASACLEAN
[Machine: 200 ton injection molding machine at 530°F - Total Purge time 30 minutes]
(Purge piles shown are in 5-minute intervals)
WITH ASACLEAN
[Machine: 200 ton injection molding machine at 530°F - Total purge time: 10 minutes]
