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Trial Number 0

Trial Purpose:

To evaluate residue via coefficient of friction for multipurpose aerosol cleaners

Date Run:

06/02/2009

Experiment Procedure:

Coefficient of friction was measured with an IMASS, Inc SP-102B-3M90 Slip/Peel Tester (Figure 1). Two types of friction coefficients were measured using this instrument. The first, Static CoF, was determined by obtaining the force required to move the specimen from a stationary position. The second, Sliding CoF (or Kinetic), was found by measuring the average force required to maintain movement at a certain rate. Measured forces will have peaks and valleys in the amount of force needed to keep moving. Average these values results and dividing by the weight of the object will result in the desired coefficient.
Figure 1. IMASS Slip/Peel Tester

The Slip/Peel tester was first adjusted to ensure that the device was properly calibrated for the sled weight being used. A coupon was then placed and clamped onto the bed of the device. The speed of the bed was set to 45”/min. The instrument records two values, the peak, the valley and calculates the average. The device was run three times per coupon for measuring the Static CoF and three times to measure the Kinetic CoF. Each coupon’s value was averaged and then the values for each finish (three coupon averages) were averaged to get one value for the Static Coefficient of Friction and one value for the Kinetic Coefficient of Friction. The coupons were then sprayed with the supplied cleaning product. The cleaner had a 5 second dwell time on the glass coupons and then was wiped off using a Kmberly-Clark Wypall X60 reinforced wiper. A second set of readings for SCoF were recorded for the treated surface. Following the SCoF a second application of the cleaner was applied to the measuring the KCoF.

These values for treated coupons were compared to the CoF for the same untreated coupons to determine the effect on CoF.
Coefficient of Friction = Ratio of tractive (pulling) force to the normal force (sled weight):
CoF = F/N = (Tractive force)/(Normal Force) = (meter reading)/(sled weight)
Sled weight = 1

Trial Results:

Three products (A00166, A0170 and SD-20) resulted in an increase in the coefficient of friction for both static and kinetic. The Formula 409 caused in a decrease in both values. One product (Mr. Jinx) had minor changes up and down for the static CoF but decreased for the kinetic CoF.

Initial CoF Static     Kinetic    
Coupon Peak Valley Aver Peak Valley Ave
A 540 309 458 578 331 492
  593 331 472 695 329 494
  581 328 483 566 330 491
B 576 274 456 560 267 443
  571 273 455 583 261 460
  600 266 469 585 258 461
C 433 337 382 477 324 398
  487 334 397 471 314 398
  493 337 404 513 329 408
D 513 405 451 578 449 512
  558 446 490 591 457 509
  597 441 515 598 460 522
E 518 414 431 500 416 469
  491 403 453 515 418 478
  445 408 462 525 419 483
Initial Averages            
  Static     Kinetic    
  Peak Valley Average Peak Valley Average
A 571 323 471 613 330 492
B 582 271 460 576 262 455
C 471 336 394 487 322 401
D 556 431 485 589 455 514
E 485 408 449 513 418 477

Treated CoF

  Static     Kinetic    
Coupon #  Peak Valley Average Peak Valley Average
A 873 617 751 701 497 615
  854 590 720 720 507 616
  862 650 762 755 541 659
B 721 443 615 724 588 691
  1046 459 662 915 563 802
  1032 432 775 921 506 793
C 900 427 542 726 515 652
  672 449 572 796 528 718
  730 476 609 822 521 719
D 511 430 471 481 260 383
  564 442 478 510 271 400
  574 459 486 546 291 434
E 393 212 315 435 251 345
  394 213 297 426 232 330
  483 205 306 416 214 329
             
  Static     Kinetic    
Product Peak Valley Average Peak Valley Average
A 863 619 744 725 515 630
B 933 445 684 853 552 762
C 767 451 574 781 521 696
D 550 444 478 512 274 406
E 423 210 306 426 232 335

Final - Initial

    Static     Kinetic      
Product Peak Valley Average Peak Valley Average Static Kinetic
A: A00166 292 296 273 112 185 138 increase CoF increase CoF
B: A00170 351 174 224 277 290 307 increase CoF increase CoF
C: Spartan 296 115 180 294 199 295 increase CoF increase CoF
D: Claire -6 13 -7 -77 -181 -109 -/+ CoF decrease CoF
E: Formula 409 -61 -198 -143 -88 -185 -142 decrease CoF decrease CoF

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

Aspire compared equally to the Misty product and the Spartan product, all three increased the coefficient of friction after application to the glass surface.

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