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Trial Number 7

Trial Purpose:

Evaluate the effectiveness of HSP solvent blends on removing jowat hot-melt adhesive from laminate substrate

Date Run:

07/02/2024

Experiment Procedure:

Initial weight of 12 laminate coupons was recorded. All 12 coupons were soiled with 4 beads of adhesive (about 0.25 grams) each with the use of a heat gun in the fume hood. Coupons were left to air dry and dirty weights were recorded. 4 HSPiP solvent blends were prepared in the fume hood, which included Cleaner A (58% Anisole, 42% Diethyl Carbonate), Cleaner B (52% Acetone, 48% Ethyl Acetate), Cleaner C (47% Ethyl Acetate, 53% Thiophene), and Cleaner D (23% Acetone, 77% Anisole). Each coupon was manually cleaned with a wypall and a cleaner for 30 seconds (3 coupons per cleaner). The coupons were left to dry in the fume hood. Clean weights were taken for all coupons.

Trial Results:

Solvent Blend Coupon # Initial Weight Dirty Weight Clean Weight % Removal Average % Removal
A 1 5.9621 6.1903 6.1734 7.41 6.76
2 5.7058 5.8983 5.8814 8.78
3 5.8759 6.1076 6.0981 4.10
B 4 5.8526 6.0897 6.0788 4.60 4.08
5 6.2696 6.4909 6.4803 4.79
6 5.5055 5.7231 5.7169 2.85
C 7 5.6060 5.8409 5.8291 5.02 6.86
8 5.6357 5.8812 5.8679 5.42
9 5.8505 6.0417 6.0223 10.15
D 10 5.8740 6.1199 6.1070 5.25 4.51
11 5.7596 6.0039 5.9939 4.09
12 5.8692 6.1175 6.1071 4.19

Success Rating:

Test incomplete or inconclusive.

Conclusion:

None of the solvent blends were effective in removing the adhesive in this application, a re-examination of the cleaning process is necessary and a retest is required.

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