To evaluate supplied cleaner for four contaminants.
Date Run:
08/13/2002
Experiment Procedure:
Four contaminants were selected based on past testing and from clients requests. Contaminants selected were:
Oil - Citgo Quenching Oil 22 (64741-89-5, 8052-42-4)
Cutting Fluid - Steco Corp, Tap Magic Protap (112-80-1, 112-62-9)
Ink - Essilor Yellow Ink Y368 Akyl resin printing ink (107-87-9, 123-86-4, 108-65-6, 1330-20-7) Adhesive/Resin - Emerson & Cuming 2651-1 Black (1675-54-3, 14808-60-7, 122-60-1, 330-54-1, 1333-86-4).
Each contaminant was applied to three preweighed steel coupons using a hand held swab. Contaminants were aged using a Master Appliance Heat Gun at 500 F for 10 minutes. Coupons were allowed to sit for 2 hours at 68 F and then weighed again to determine the amount of contaminant added. Four 600 ml beakers were filled with Metabolix E3HB and degassed in a Crest 40 kHz ultrasonic tank for 5 minutes. Four additional beakers were filled with water to be used as a control. Cleaning lasted for two minutes, followed by a 15 second tap water rinse at 68 F and 30 second drying with the heat gun at 500 F. The coupons were allowed to cool to room temperature and weighed again. Efficiencies were calculated for the different contaminant removals.
Trial Results:
The Metabolix product was very successful in removing the four contaminants. Efficiencies were over 99% for three of the four contaminants. Even though the last contaminant from Emerson & Cuming only had an efficiency of 78%, two of the three coupons had over 85% of the adhesive removed. The third coupon had an efficiency of 45%. Upon review of the initial amount of adhesive added to the coupons, it was noted that the coupon with the low efficiency had more adhesive than the other two coupons combined. Cleaning in two minutes removed the same amount of adhesive, approximately 0.85 grams for the two coupons with over 1 gram initially. The table below shows the amount of contaminant added and remaining for each coupon cleaned.
Water was found to remove very little of the contaminants as shown in Table 2.
Table 1. Cleaning Efficiencies
Cleaner
Initial wt of cont.
Final wt of cont.
%Cont Removed
Quench Oil
0.1713
0.0019
98.89
0.3113
-0.0003
100.10
0.3898
0.0044
98.87
Cutting Fluid
0.2761
0.0016
99.42
0.6049
0.0023
99.62
0.6711
0.0001
99.99
Ink
0.7771
-0.0004
100.05
0.3944
-0.0003
100.08
0.5697
0.0000
100.00
Adhesive
1.861
1.0091
45.78
0.8519
Adhesive removed
0.595
0.0011
99.82
1.0081
0.1197
88.13
0.8884
Adhesive removed
Table 2. Water Efficiencies
Quench Oil
0.1009
0.0362
64.12
0.1161
0.0742
36.09
0.0782
0.0244
68.80
Cutting Fluid
0.1444
0.1028
28.81
0.1787
0.0651
63.57
0.2512
0.1064
57.64
Ink
0.1774
0.1661
6.37
0.2419
0.2033
15.96
0.2091
0.1894
9.42
Adhesive
0.4029
0.2388
40.73
0.2658
0.1736
34.69
0.4029
0.2003
50.29
Success Rating:
A follow up test, usually based on company input.
Conclusion:
The supplied product was found to be successful on the four contaminants.
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