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Trial Number 5

Trial Purpose:

To evaluate abrasion resistance for various floor finishes

Date Run:

06/30/2006

Experiment Procedure:

Control of Moisture Content and Temperature
The moisture content at the time of testing will influence results due to the hydroscopic nature of the base materials. Therefore, efforts must be taken to ensure that the moisture content and temperature remain constant during the evaluation period. Ideally, the sample floor should be kept at 65+/-1% relative humidity and 68+/-6 F.

During laboratory testing, conditions were 64% relative humidity and the temperature was ~74 F.

Sample Preparation
The flooring material supplied was Hardwood flooring made from Red Oak. The boards were ¾” thick, 2 ¼” wide and cut into 8” sections.

Three coupons were coated with a supplied floor finish according to the manufacturers’ specifications. The finish was applied using a 1” Pure Bristle 1500 paint brush. To ensure proper coating application rates, the coatings were applied via pipettes to surface. Three coats were used for each floor finish as this was common number of coating layers suggested by the various manufacturers.

The first two coatings were allowed to dry for 2 hours prior to the application of the next coat. The second coat for the current process was allowed to dry overnight before the application of final coat. The Completed coupons were allowed to sit for a minimum period of 24 hours before performance evaluations were conducted.

Abrasion Resistance
The methodology used for this experiment uses little from the ASTM standard. The 80 grit aluminum oxide was used as sandpaper, the testing went for two, 100 cycles and the Navy-type Wear Tester instrument was replaced with the BYK Gardner Abrasion Tester (Figure 4).

Figure 1. Abrasion Tester Apparatus

Coupons were placed into the Abrasion tester and subjected to the 100 cycles with the 80 grit sandpaper. At the end of the first cycle, the coupons were wiped with a dry sponge to remove any dust that was generated. Three thickness measurements were made and recorded to determine the decrease in surface thickness. The coupon was then subjected to the second 100 revolutions with the sandpaper. Measurements were made in the same manner as the first set.

Trial Results:

Averages for both sets were calculated and compared to the other floor finishes.

Product Initial Thickness Overall Ave Coating
CP 0.7630 0.7636
  0.7659  
  0.7618  
MCP 0.7564 0.7547
  0.7568  
  0.7511  
BO 0.7594 0.7538
  0.7507  
  0.7512  
BW 0.7558 0.7578
  0.7574  
  0.7602  
Blank 0.7471 0.7494
  0.7453  
  0.7559

Coupon Thickness After Abrasion Testing

Cycle 1                
Product Coupon Center End 1 A End 2 A Average Final Coat - Cycle 1 Ave Product Ave Cycle 1 Loss
CP 16 0.7602 0.7525 0.7594 0.7574 0.0057 0.7596 0.0040
  17 0.7583 0.7644 0.7638 0.7622 0.0037    
  18 0.7592 0.7584 0.7598 0.7591 0.0027    
MCP 19 0.7438 0.7501 0.7555 0.7498 0.0066 0.7482 0.0066
  20 0.7467 0.7520 0.7500 0.7496 0.0072    
  21 0.7447 0.7494 0.7412 0.7451 0.0060    
BO 22 0.7549 0.7555 0.7552 0.7552 0.0042 0.7471 0.0067
  23 0.7360 0.7472 0.7383 0.7405 0.0102    
  24 0.7371 0.7501 0.7497 0.7456 0.0056    
BW 25 0.7497 0.7511 0.7523 0.7510 0.0047 0.7491 0.0087
  26 0.7473 0.7477 0.7489 0.7480 0.0094    
  27 0.7490 0.7447 0.7511 0.7483 0.0119    
Blank 28 0.7378 0.7409 0.7420 0.7402 0.0069 0.7451 0.0043
  29 0.7439 0.7443 0.7453 0.7445 0.0008    
  30 0.7476 0.7547 0.7497 0.7507 0.0052    

Cycle 2

Cycle 2                
Product Coupon Center End 1 A End 2 A Average Final Coat - Cycle 2 Ave Product Cycle 2 Ave Loss
CP 16 0.7590 0.7517 0.7521 0.7543 0.0088 0.7556 0.0079
  17 0.7556 0.7586 0.7572 0.7571 0.0088    
  18 0.7558 0.7533 0.7574 0.7555 0.0063    
MCP 19 0.7426 0.7426 0.7522 0.7458 0.0106 0.7455 0.0093
  20 0.7440 0.7498 0.7488 0.7475 0.0092    
  21 0.7433 0.7460 0.7398 0.7430 0.0080    
BO 22 0.7529 0.7546 0.7518 0.7531 0.0063 0.7440 0.0098
  23 0.7313 0.7450 0.7330 0.7364 0.0143    
  24 0.7308 0.7471 0.7495 0.7425 0.0088    
BW 25 0.7474 0.7496 0.7498 0.7489 0.0068 0.7468 0.0110
  26 0.7433 0.7462 0.7458 0.7451 0.0123    
  27 0.7480 0.7409 0.7503 0.7464 0.0138    
Blank 28 0.7372 0.7404 0.7381 0.7386 0.0085 0.7430 0.0064
  29 0.7397 0.7377 0.7447 0.7407 0.0046    
  30 0.7472 0.7542 0.7480 0.7498 0.0061    

Average Loss

  Initial Thickness Average Loss Total Loss Beyond Coating
Cycle 1 Cycle 2
CP 0.0056 0.0040 0.0039 0.0079 0.0024
MCP 0.0061 0.0066 0.0027 0.0093 0.0032
BO 0.0061 0.0067 0.0031 0.0098 0.0037
BW 0.0055 0.0087 0.0023 0.0110 0.0055
Blank 0.0000 0.0043 0.0021 0.0064 0.0064

Figure 2 compares coating losses visually.

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

The current practice had the greatest resistance to the abrasion, followed by the modified process and the Bona - Oil based mix.

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