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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