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Trial Number 2

Client Number 183

Project Number 1

Trial Purpose:

To compare new spray delivery system with traditional spray can method for drying time

Date Run:

06/19/2002

Experiment Procedure:

Three clean steel plates (12” x 12”) were coated with each delivery system for 15 seconds.  At the end of the application, a timer was started.  The drying rate for each system was monitored at several intervals to determine when the coating was dry. Measurements were made at 10 seconds for the first minute, then every 30 seconds for the next 10 minutes and then every minute until dry.  White hand held swabs were briefly touched to the surface to determine if the coating was dry or not.

Trial Results:

Systems Evaluated: Enviro Caddie; Aerosol Spray Can

The Traditional Spray Can system (TSC system) required far less time to dry than the Enviro Caddie System (EC system). The TSC system need around 12 minutes to dry completely where as the EC system needed over 25 minutes. Table 1 lists the observations made for each system during throughout the drying cycle.

Table 1.  Drying Time Enviro Caddie  
Coupon # 8 9 10
Time (sec)      
10 Very uneven distribution of paint. Some "puddles" or drip areas. Paint thick and when touched with a swab paint is left on swab.  Very uneven distribution of paint. Some "puddles" or drip areas. Paint thick and when touched with a swab paint is left on swab.  Distribution of paint is better. Not many thick, dripping areas
20 wet wet wet
30 wet wet wet
40 wet wet wet
50 wet wet wet
60 wet wet wet
1 min 30 wet wet wet
2 min   wet wet Thin areas more sticky then wet. Thick areas still wet
2 min 30 wet wet Same
3 min   wet Thin areas more sticky then wet. Thick areas still wet Same
3 min 30 Thin areas more sticky than wet. Thick areas still wet Same Same
4 min   Same Same Same
4 min 30 Same Same Same
5 min   Same Same Thin areas are tacky, not much paint lifting. Thick areas are sticky not wet. 
5 min 30 Same Same Same
6 min   Same Same Same
6 min 30 Same Same Same
7 min   Same Thin areas tacky and not much paint lifting. Thick areas sticky not liquid wet Same
7 min 30 Same Same Same
8 min   Thin areas tacky and not much paint lifting. Thick areas sticky not liquid wet Same Same
8 min 30 Same Same Same
9 min   Same Same Same
9 min 30 Same Same Same
10 min Same Thin areas are tacky with no paint pulling off but indentations are left in paint where touched. Thick areas tacky with paint still lifting.  Thin areas are tacky with no paint pulling off but indentations are left in paint where touched. Thick areas tacky with paint still lifting. 
12 min Thin areas are tacky with no paint pulling off but indentations are left in paint where touched. Thick areas tacky with paint still lifting.  Same Thin areas dry to touch but indentations still left in paint where touched. Thick areas tacky with very little paint lifting
14 min Same Same Same
16 min Thin areas dry to touch but indentations still left in paint where touched. Thick areas tacky with very little paint lifting Thin areas dry to touch but indentations still left in paint where touched. Thick areas tacky with very little paint lifting Same
18 min Same Same Thin dry to touch and no indentation. Thick is dry to touch but indentions in paint when touched. 
20 min Thin areas are dry. NO indentations when touched. Thick areas tacky with NO paint pulling off. Indentations left in paint in thick areas. Same Same
22 min Same Thin areas are dry. NO indentations when touched. Thick areas tacky with NO paint pulling off. Indentations left in paint in thick areas. Thin and thick areas are dry to touch and no indentations left when touched with swab. 
24 min Same Same  
26 min Same Thin and thick areas are dry to touch and no indentations left when touched with swab.   
28 min Thin and thick areas are dry to touch and no indentations left when touched with swab.     
  Dry @ 28 min Dry @ 26 min Dry @ 22 min
  Average dry time is 25 1/3 minutes  
       
    Traditional Spray Can Method  
Coupon # 5 6 7
Time (sec)      
10 Paint is more evenly distributed with less puddles or thick areas. Less paint is delivered, paint is thinner all over.  Paint is more evenly distributed with less puddles or thick areas. Less paint is delivered, paint is thinner all over.  Paint is more evenly distributed with less puddles or thick areas. Less paint is delivered, paint is thinner all over. 
20 wet wet wet
30 wet wet wet
40 wet wet wet
50 wet wet Thin areas sticky not liquid wet. Paint lifting off coupon when area touched showing how thin paint has been applied. Thick area wet
60 Thin areas sticky not liquid wet. Paint lifting off coupon when area touched showing how thin paint has been applied. Thick area wet Thin areas sticky not liquid wet. Paint lifting off coupon when area touched showing how thin paint has been applied. Thick area wet Same
1 min 30 Same Same Same
2 min   Same Same Thin area tacky, very little paint lifting. Thick area sticky
2 min 30 Thin area tacky, very little paint lifting. Thick area sticky Thin area tacky, very little paint lifting. Thick area sticky Same
3 min   Same Same Same
3 min 30 Same Same Same
4 min   Same Same Same
4 min 30 Same Same Thin area dry to touch, no paint lifting. Minor indentions due to thinness of layer. Thick spot tacky, lifting very little. 
5 min   Same Thin area dry to touch, no paint lifting. Minor indentions due to thinness of layer. Thick spot tacky, lifting very little.  Same
5 min 30 Thin area dry to touch, no paint lifting. Minor indentions due to thinness of layer. Thick spot tacky, lifting very little.  Same Same
6 min   Same Same Same
6 min 30 Same Same Thin area dry with no indentations. Thick area tacky, very little paint lifting. Still indentations
7 min   Same Thin area dry with no indentations. Thick area tacky, very little paint lifting. Still indentations Same
7 min 30 Thin area dry with no indentations. Thick area tacky, very little paint lifting. Still indentations Same Same
8 min   Same Same Same
8 min 30 Same Same Same
9 min   Same Same Thin area fry. Thick area dry to touch, no paint lifting. Indentations still present. 
9 min 30 Same Thin area fry. Thick area dry to touch, no paint lifting. Indentations still present.  Same
10 min Thin area fry. Thick area dry to touch, no paint lifting. Indentations still present.  Same Same
11 min Same Same Thick and thin areas dry. No paint lift and no indentations. 
12 min Same Thick and thin areas dry. No paint lift and no indentations.   
13 min Thick and thin areas dry. No paint lift and no indentations.     
  Dry @ 13 min  Dry @ 12 min Dry @ 11 min 
  Average dry time is 12 minutes  
       
Observations Enviro Caddie delivers more paint overall then the traditional method. 

Substrates: Steel Plate;
Coating Type: Paint;
Delivery System: Average Drying Time
Enviro Caddie 25.33 minutes
Traditional Spray Can 12 minutes

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The Traditional Spray Can system required half the time to dry.  This may be due to the fact that the Enviro Caddie System applied more paint to the surface than the Traditional Spray Can system. A follow study could be performed to compare drying time of equal amounts of applied paint.

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