Page 165 - JSOM Fall 2020

FIGURE 3 Adhesion data of test article under different FIGURE 6 Adhesion data of adhesive technology under dirty,
environmental conditions (ambient room temperature (23 ± 2°C), dry, and sweaty conditions on human volunteers. Summary of all
a cold environment (at least –5°C) and a warm environment individuals assessed irrespective of body hair coverage.
(40 ± 2°C).

FIGURE 4 Adhesion data of test article under dry and sweaty
conditions. FIGURE 7 A more in-depth analysis of Figure 6, whereby the
hairiness of the volunteers’ test site is assessed. Note that more
individuals were male, so the level of hairy test sites was higher than
that in the female group.

FIGURE 5 Adhesion data of test article under dirty, dry, and sweaty
conditions.

In assessing the increase in skin moisture content through
sweat, the corneometer results on average increased by a value
of 73, with the lowest recording increase being 47 and the
highest increase being 107. The corneometer measures the
change in the dielectric constant due to skin surface hydration
changing the capacitance of a precision capacitor. The mea- The data within Figure 7 indicate that for all groups and con-
surement can detect even slightest changes in the hydration ditions, the adhesion level was still very high. There appears
level. This supports that the exercise that took place increased to be a trend in dry clean and sweaty dirty conditions to hair
perspiration (Figure 6). affecting the adhesion profile of the adhesive technology, but
this reduction in adhesion did not result in the adhesive tech-
The adhesion data for the adhesive technology when applied nology falling off (Figure 8).
to surfaces that are dirty, both dry and sweaty, indicate that
there is very little difference between all conditions, dirty, The adhesion data for the adhesive technology under different
clean or sweaty dirty, sweaty clean when applied to human environmental conditions indicate that the adhesive character-
volunteers. There is a large standard deviation, which may re- istics of the adhesive technology are not adversely affected by
flect the differences in skin related to age, sex, and natural oils temperature, and to some degree a warmer environment may
(Figure 7). increase adhesion (Figure 9).

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