Process for preparation of cellulose acetate filters for use in paper making
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United States of America Patent
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Sep 2, 1997
Grant Date -
N/A
app pub date -
Jan 19, 1995
filing date -
Jan 19, 1995
priority date (Note) -
Expired
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Abstract
The present invention discloses a process for treating filter rods comprising cellulose acetate tow waste comprising the steps of: a. cutting said filter rods so that fiber of said cellulose acetate have a fiber length of less than about 4 inches; and b. treating said cut filter rods with an aqueous base until at least 5% of acetyl groups on said cellulose acetate has been hydrolyzed. Filter rods treated in this manner are suitable for use in various paper products. The process of the present invention may further include a step for repulping the cut filter rods to repulp any included plugwrap. Modified fiber comprising cellulose acetate wherein at least 5% of acetyl groups on said cellulose acetate have been hydrolyzed, said fiber having a length of less than about 4 inches, are also disclosed. Paper products comprising between about 5 and about 90% of the fiber of claim 21 and paper pulp are also disclosed.
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