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In this study, two types of super absorbent polymer (SAP,
SAP-1, SAP-2) were used to be the main absorbent, mixed with PE
thermoplastic powder as the inner materials respectively.
Besides, two different mass of per unit area of nonwoven fabrics
(12 g/m2 and 45 g/m2) were also used as the cover layer and the
base layer. By sprinkling the powder, the mass of per unit area
was maintained at 50 g/m2, then, through heating and thermal-
setting to manufacture two kinds of water blocking (nonwoven)
tape (WBT, WBT-1 and WBT-2). At last, we tested the physical
properties of the WBT. Theswelling properties of WBT were
tested under various relative humidity, temperature, and ionic
concentration. Expecting the result could be a reference of
WBT. From the result, it showed that the swelling heights
of WBT-1 and WBT-2 under distilled water were 13.5mm and 9.0mm
respectively, under artificial brine were 1mm and 0.5mm
respectively. The reductions of swelling recovery were 68.2%
and 16.7% respectively. The result under environmental
simulations treated indicating that, the swelling speed and
swelling height of WBT-1 would decrease under high relative
humidity, but the swelling height of WBT-2 wouldn't be affected.
In the test of thermal degrada degradation, the swelling height
of WBT-1 decreases 33.3%, and 11.1% on WBT-2. In the test of
swelling under different distilled water temperatures, WBT-2 has
better thermal stability of absorbent than WBT-1. Under
different brine concentrations, the effect on the swelling
height of WBT-2 is not very obvious. The swelling height
reduction between distilled water and artificial brine of WBT-1
is 3.7%, and 11.1% for WBT-2.
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