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Trial Number 8

Trial Purpose:

To evaluate the three follow up products on removing the EVA film from glass surface.

Date Run:

06/18/2008

Experiment Procedure:

The three products from the previous trial were used at full strength and room temperature. Nine preweighed glass coupons were contaminated with a strip of the supplied EVA material. The material was heated with a Master Appliance Heat gun to melt the EVA onto the surface. Coupons were weighed again to determine the amount of contamination added. Three coupons were then cleaned with each solution.
Cleaning was performed by soaking a WypAll X60 reinforced paper towel with the cleaning solution. The coupons were then manually wiped for unto 1 minute followed by a 5 second wipe with a dry towel. Visual observations were made and recorded during cleaning. Once dry, the coupons were weighed a final time and removal efficiencies were calculated for each product.

Trial Results:

Only one product removed the EVA during the manual cleaning. An additional product started to break the bond between the glass and the EVA but was not able to completely remove the contaminant from the surface. The Clorox Green Works glass cleaner need under 10 seconds to completely remove the film from the glass. The table lists the amount of film added, the amount remaining, the efficiency for each coupon cleaned and the percent of the film that was displaced from the surface (lifted).

Cleaner Initial wt Final wt % Removed Lift Time needed
BioGold #3 0.9039 0.9360 -3.55 10  
  0.8863 0.0028 99.68 100  
  0.9515 0.9809 -3.09 2  
Soy Strong 0.8845 0.8642 2.30 5  
  1.0171 1.0060 1.09 40  
  1.0247 1.0301 -0.53 90  
Green Works Glass 1.1530 -0.0001 100.01 100 10 sec
  1.0672 0.0001 99.99 100 10 sec
  0.8393 0.0002 99.98 100 5 sec

Success Rating:

Results suggest a scale-up feasible match for cleaning chemistry and equipment. Pilot plant study with actual parts recommended.

Conclusion:

The Green Works Glass cleaner was very effective at removing the EVA film and will next be evaluated for flux removal.

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