Cellulose acetate tow with low DPF and low titanium dioxide content
US11774419B2 · kind B2 · utility
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6References
18Claims
0Family size
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Key dates
| Filing date | Apr 22, 2020 |
| Grant date | Oct 3, 2023 |
| Priority date | — |
| Expiry date | Nov 28, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.