Paper comprising PIPD floc and process for making the same
US8444814B2 · kind B2 · utility
2Cited by
12References
8Claims
0Family size
Inventor
Key dates
| Filing date | Dec 19, 2006 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Sep 9, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a paper comprising polypyridobisimidazole floc having a length of from 1.0 to 15 mm, where the apparent density of the paper is from 0.1 to 0.4 g/cm3 and the tensile strength of the paper in N/cm is at least 0.000052X*Y, where X is the volume portion of polypyridobisimidazole in the total solids of the paper in % and Y is basis weight of the paper in g/m2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.