Tim J Frederick

US Patent:

56627734, Sep 2, 1997

Filed:

Jan 19, 1995

Appl. No.:

8/375765

Inventors:

Tim J. Frederick - Kingsport TN
Melvin G. Mitchell - Kingsport TN
Lee R. Partin - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

D21H 1306

US Classification:

162 4

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.

US Patent:

55736408, Nov 12, 1996

Filed:

Jul 28, 1995

Appl. No.:

8/506986

Inventors:

Tim J. Frederick - Kingsport TN
Melvin G. Mitchell - Kingsport TN
Lee R. Partin - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

D21H 1302

US Classification:

162146

Abstract:

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.

US Patent:

52584917, Nov 2, 1993

Filed:

Sep 4, 1992

Appl. No.:

7/941282

Inventors:

Victor H. Agreda - Kingsport TN
Eddie J. Eckart - Batesville AR
Tim J. Frederick - Kingsport TN
J. Adrian Hawkins - Johnson City TN

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C08F 600
C08G 802

US Classification:

528495

Abstract:

Disclosed is a process for removing the Lewis acid catalyst, polymerization solvent and byproducts, such as ketals, from a polyetherketone comprising (A) introducing into an extraction zone a Lewis acid polymerization catalyst, a polymerization solvent and a polyetherketone, (B) passing an alcohol through the extraction zone to remove a majority of the Lewis acid catalyst and the polymerization solvent, (C) passing water through the extraction zone to remove a majority of the alcohol, (D) contacting the polyetherketone with an aqueous acid solution, (E) passing water through the extraction zone to remove a majority of the acid, (F) passing steam through the extraction zone, and (G) subjecting the polyetherketone to a reduced pressure.

US Patent:

57797366, Jul 14, 1998

Filed:

Jan 19, 1995

Appl. No.:

8/375140

Inventors:

Tim J. Frederick - Kingsport TN
Melvin G. Mitchell - Kingsport TN
Lee R. Partin - Kingsport TN
Alan K. Wilson - Kingsport TN
Richard D. Neal - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

D06M 1100

US Classification:

8130

Abstract:

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.

US Patent:

53649354, Nov 15, 1994

Filed:

Apr 23, 1993

Appl. No.:

8/051435

Inventors:

Mark K. Cox - Kingsport TN
Tim J. Frederick - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C08B 306
C08B 102
C08B 322

US Classification:

536 69

Abstract:

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%.