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| Thermal
Stability, Thermal Degradability |
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Water-soluble
PVA film is possible to seal at temperature (120-180 )
like the polyethylene film and its heat-sealing intensity can arrive
to 9.1N/cm. It is fit for heat sealing of resistance and sealing in
high frequency.
PVA slowly discolors above 100,
discolors within a short time above 150,
and rapidly discolors and begins to thermally decompose above 200.
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