Polyvinyl acetate sponge and method for producing same
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United States of America Patent
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Issued Date -
Mar 13, 2003
app pub date -
Sep 10, 2001
filing date -
Sep 10, 2001
priority date (Note) -
Abandoned
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Abstract
The present invention relates generally to a polyvinyl acetate (PVA) sponge. More specifically, a PVA sponge according to the present invention has certain improved physical characteristics, such as uniform pore size, a microscopically rough surface, and/or a neutral surface charge. Certain characteristics may be achieved by a variety of methods in which pore-forming chemicals are dissolved into a PVA solution, so that no solid residues remain in the pores of a PVA sponge after production. Neutral surface charge of a PVA sponge may be achieved by adding a charge modifying agent during the sponge making process.
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