Eastman Chemical Company

Eastman-Kodak Company

Tim J Frederick

Lee R Partin

Melvin Glenn Mitchell

Alan Kent Wilson

Victor H Agreda

Richard D Neal

J Adrian Hawkins

Eddie Joseph Eckart

Mark K Cox

The present invention discloses a process for producing a fibrillated cellulose acetate fiber comprising contacting cellulose acetate fiber with a strong base solution at conditions sufficient to remove greater than about 5% of bulk acetyl groups from said cellulose acetate fiber. Modified cellulose acetate staple fiber comprising an outer layer of regenerated cellulose in which at least about 5% of the acetyl groups are removed on an overall fiber basis are also disclosed. Paper products incorporating said fibers are also disclosed.

Process for making fibrillated cellulose acetate staple fibers

The present invention discloses a process for treating filter rods comprising cellulose acetate tow waste comprising the steps of:

Process for preparation of cellulose acetate filters for use in paper

A composition of paper comprising 99 to 10 weight percent cellulose fibers and 1 to 90 weight percent cored cellulose fibers that are uniformly dispersed within the paper. The cored cellulose fibers are composed of a cellulose sheath that is 4 to 15 weight percent of the weight of the fiber and a cellulose acetate core. The cored cellulose fibers contain no substantial crimp and have an average length of 1 to 7 mm, a density of 1.20 to about 1.35 gm/cc, a denier 1 to 30 grams per 9,000 meters and a uniform dispersion index of less than 0.15.

Paper made with cellulose fibers having an inner core of cellulose

Disclosed is a process comprising continuously flowing a composition through a hydrolysis zone so as to achieve a residence time distribution such that at least 81% of the area under the residence time distribution curve is within plus or minus 50% of the mean residence time. The composition comprises cellulose triacetate in the range of 5 to 30%, water in the range of 4 to 25%, and acetic acid in the range of 45 to 91%.

Continuous hydrolysis of cellulose acetate

Disclosed is a process for removing the Lewis acid catalyst, polymerization solvent and byproducts, such as ketals, from a polyetherketone comprising

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Kingsport, TN, United States of America

Tim J Frederick