Process for manufacturing a composition which can be used for the production of stoppers, composition and stopper comprising such a composition
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United States of America Patent
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Jan 11, 2000
Grant Date -
N/A
app pub date -
Jun 29, 1998
filing date -
Jun 27, 1997
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Expired
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Abstract
The invention relates to a process for manufacturing a composition which can be used for producing stoppers. According to the invention, it comprises the following steps: a) sheets of cork are ground into small-sized granules, b) said cork granules are decomposed into granules having a high lignin content and into granules having a high suberin content, and c) the lignin-rich granules are separated from the suberin-rich granules in order to keep only the suberin-rich granules in said composition. The invention also relates to a composition comprising suberin-rich cork granules as well as to a stopper comprising such a composition.
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