The coupons were received from the client. Two contaminants were applied to the coupons with a foam swab. One agent, Crystal 4000, was applied to the black coupon and the other contaminant, Chem Trend CT 2004, was applied to the beige coupon. Cleaning took place in an agitated wash with a 10% solution in a beaker for fifteen minutes at 140 F. Then the coupons were rinsed in tap water for ten seconds at 138 F. A two-stage drying was used. First the parts were passed under an air knife for two minutes at ambient conditions. Then the coupons were put in an oven for 45 minutes at 181 F. After the parts cooled in a desiccator to room temperature, they were inspected visually for cleanliness.
SUBSTRATE MATERIAL: Acrylate polymer coupons
CONTAMINANTS: Silicone mold release agents CONTAMINATING PROCESS USED: Applied contaminants with foam brush swab.
Trial Results:
A good deal of mold release agent was visible on the coupons after the cleaning trial. It appeared that the cleaner and or the method selected did not work well.
Success Rating:
Test incomplete or inconclusive.
Conclusion:
Due to insufficient cleaning, further testing must be performed to find a cleaning process.
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Who We Are
The Toxics Use Reduction Institute at the University of Massachusetts Lowell (“TURI”), is a state agency and public institution of higher education, formed under MGL c. 75, and the Toxics Use Reduction Act (“TURA”), MGL c. 21I.
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