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Trial Number 0

Trial Purpose:

To compare new spray delivery system with traditional spray can method.

Date Run:

06/12/2002

Experiment Procedure:

Ten preweighed particle board tiles were placed into a spray chamber to be coated one a time.  Five  tiles were to be coated with one of the two spray application methods.  The paint spray nozzle was placed 12 inches perpendicular to the tile.  The spray system was operated for 5 seconds moving from left to right and back right to left across the face of the tile.  After the 5 seconds, the tile was removed from the spray chamber and placed flat to dry.  Once the paint was dry, a second weight was recorded and coating amounts were calculated.  The results of each system were compared.

Trial Results:

After applying the paint to the tile for 5 seconds and reweighing after drying, it was determined that the Enviro Caddie system (EC system) applied about 3 times as much paint to the surface than the traditional spray can system (TSC system) did. The EC system applied about 1.5 grams of paint compared to 0.57 grams from the TSC system. The TSC system did have a lower standard deviation of paint application levels as compared to the EC system. Table 1 below lists the weights and calculated delivery rates.

Table 1. Short Application Comparison

Performance Evaluation #1
Short Coating
Substrate Tile
Analysis Method Gravimetric, Photography, Visual
        weight in grams     Weight/time
System Coupon # Base After Coating Coating Weight Average Wt Std Deviation g/sec
Envirocaddie 1 313.71 314.96 1.25     0.250
  2 299.20 300.52 1.32     0.264
  3 304.70 306.28 1.58     0.316
  4 308.64 310.41 1.77     0.354
  5 298.53 300.07 1.54 1.49 0.21 0.308
Traditional 6 300.05 300.64 0.59     0.118
  7 309.00 309.57 0.57     0.114
  8 286.86 287.36 0.50     0.100
  9 308.48 309.16 0.68     0.136
  10 298.62 299.14 0.52 0.57 0.07 0.104

When comparing the application appearance, the EC system provided a thicker, glossier finish but did have small crater like formations across the tile. The TSC system resulted in a thin, flat coating. The EC system nearly coated the entire tile within the 5 second time period. The TSC system covered less surface than the EC system. The figures below show the appearance of the spray application.
Figure1. Enviro Caddie System Short Application

Figure 2. Traditional Spray Can System Short Application

Delivery System:           Average Coating Weight per time
Enviro Caddie                    0.298 g/sec
Traditional Spray Can        0.114 g/sec

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The Enviro Caddie system was found to apply more paint than the Traditional Spray Can system in a set time period.

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