Biodegradable cellulose acetate foam and process for its production
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United States of America Patent
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Apr 24, 2001
Grant Date -
N/A
app pub date -
Apr 28, 1999
filing date -
Sep 5, 1997
priority date (Note) -
Expired
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Abstract
A biodegradable cellulose acetate foam with a foam cell size of 0.001-0.8 mm and an apparent density of 0.01-0.27 g/cm.sup.3, and a biodegradable cellulose acetate foam wherein the foam is treated with a weak alkali solution, and has an acetylation degree of 45-60% and no acetic acid odor.
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