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Trial Number 0

Trial Purpose:

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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