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Trial Number 9

Trial Purpose:

Evaluate HSP mixture options for removing both the Jowat hot-melt adhesive and wilsonart adhesive from laminate coupons

Date Run:

12/05/2024

Experiment Procedure:

Two sets of 9 coupons were weighed and soiled with the Jowat Hot-melt adhesive and wilsonart banding adhesive and then weighed again. The coupons were then scrubbed for 30 seconds with a rag that had been soaked in one of the three solvent mixtures. The first being a mixture (by weight) of Acetone (34%) and Ethyl Acetate (66%), the second being anisole (21%) and 1,3-dioxolane (79%), and the last being acetone (20%) and anisole (80%). After being wiped, the coupons were allowed to air dry overnight and weighed a final time to evaluate how much of the soil was removed.

Trial Results:

Cleaner Adhesive Coupon # Initial Dirty Clean %Cont. Removed Average % Removal
1 Jowat Hot-Melt Adhesive 1 4.135 4.5492 4.4950 13.09 66.75
2 4.7450 4.7887 4.7382 115.56
3 4.7172 4.7623 4.7300 71.62
2 4 4.6853 4.7348 4.6922 86.06 86.07
5 4.8106 7.8404 4.8139 99.89
6 4.5663 4.6117 4.5789 72.25
3 7 4.6290 4.6712 4.6267 105.45 135.73
8 4.8045 4.8485 4.7847 145.00
9 4.6141 4.6423 4.5981 156.74
1 Wilsonart 3000 10 4.3508 4.3841 4.3458 115.02 115.36
11 4.9470 4.9759 4.9449 107.27
12 4.7400 4.7652 4.7340 123.81
2 13 5.0428 5.0749 5.0432 98.75 67.69
14 4.9769 5.0441 5.0035 60.42
15 4.8471 4.9020 4.8779 43.90
3 16 4.1546 4.1920 4.1586 89.30 76.44
17 4.5026 4.5514 4.5153 73.98
18 4.4584 4.5014 4.4730 66.05

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The results of this test were less than promising, the range of % removal was incredibly broad, with 7 of the 18 trial coupons reporting removal percentages significantly over 100%. This could be due to a variety of factors, it could be due to the solvent mixtures attacking the substrate, inaccuracies in analytical equipment, or some other confounding variable. A re-test is necessary.

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