A number of additives were tested. Xanthan gum was incorporated into some formulations. An emulsifier was added to some
formulations as well. An edible starch was also used. The purpose
of the incorporation of the starch was to adsorb oil and grease so
that it would not penetrate through the paper substrate. A powdered dried vegetable was used in some formulations to provide
an additional cellulose barrier. The carrier was water. A mild
Table 1: Formulations
GRAS acid salt was employed to relax the protein structure.
Coatings were applied by draw down using either zero or #
3 bars. Curing was done at either 100 ft/min, 150 ft/min, or 200
ft/min using a 400 WPI Fusion lamp with an “H” type bulb.
Table 1 shows the formulations tested. The most successful
formulations are highlighted.
Peanut butter, 3 in 1 oil(R), and canola oil were used as test
reagents. These three substances were allowed to sit directly on
a crease in the coated paper for 24 hours. Absorbent paper was
placed beneath the test samples to detect penetration. The results
are shown below in Table 2. Again, the formulations with the
best results are highlighted.
Samples of coatings were additionally tested for abrasion resistance using a Sutherland rub tester with a corrugated cardboard receptacle. Sutherland rubs were performed on some
formulations using a Danilee Sutherland 2000 rub tester with a
4 lb weight and a speed setting of 2. A standard corrugated receptacle was used.. No liquids were added. Results are shown in
Table 3.
Table 3:
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