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US 2021/0063364 A1Published application
Cellulose acetate tow with low dpf and low titanium dioxide content
AssigneeAcetate International LLC
InventorsSusan BLANKENSHIP, Dirk AMTOWER, Michael COMBS, Christopher M. BUNDREN, Karen ZAZZARA
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Abstract
Provided herein are cellulose acetate tow bands having less than 0.1 wt. % titanium dioxide, wherein the content of titanium dioxide is measured by ashing and/or by titanium particle count density. Also provided herein is a method of measuring the titanium dioxide content of cellulose acetate tow by ashing. Also provided herein is a method for measuring the color of cellulose acetate tow.
Claims20
A tow band comprising
- cellulose acetate fibers having a denier per filament less than 12.5;
- wherein the tow band comprises less than 0.1 wt. % titanium dioxide as measured by ashing and titrating and/or by titanium particle count density;
- and wherein the tow band an “L” value from 90 to 100, an “a” value from −1 to 0.5, and/or a “b” value from 2 to 6 as measured from a dope solution.
A tow band comprising:
- cellulose acetate fibers having a denier per filament less than 12.5 and a total denier from 5,000 to 100,000;
- and
- wherein the tow band is substantially free of titanium dioxide.
A tow band comprising:
- cellulose acetate fibers having a denier per filament of less than 12.5;
- wherein the tow band comprises less than 0.1 wt. % titanium dioxide, and
- wherein the tow band has an average titanium dioxide particle density of less than 1.0 titanium dioxide particles per fiber denier.
Dependencies are inferred from the claim text.