US 11,774,419 B2
Cellulose acetate tow with low DPF and low titanium dioxide content
Susan Blankenship, Irving, WV (US); Dirk Amtower, Pembroke, VA (US); Michael Combs, Pembroke, VA (US); Christopher M. Bundren, Blacksburg, VA (US); and Karen Zazzara, Blacksburg, VA (US)
Assigned to ACETATE INTERNATIONAL LLC, Irving, TX (US)
Filed by ACETATE INTERNATIONAL LLC, Irving, TX (US)
Filed on Apr. 22, 2020, as Appl. No. 16/855,627.
Claims priority of provisional application 62/892,297, filed on Aug. 27, 2019.
Prior Publication US 2021/0063364 A1, Mar. 4, 2021
Int. Cl. G01N 31/00 (2006.01); G01N 31/22 (2006.01); A24D 3/02 (2006.01); A24D 3/10 (2006.01); G01N 1/28 (2006.01)
CPC G01N 31/22 (2013.01) [A24D 3/0204 (2013.01); A24D 3/10 (2013.01); G01N 1/28 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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 has an “L” value from 90 to 100, an “a” value from −1 to 0.5, and a “b” value from 3 to 6 as measured from a dope solution.