Aromatic polyamide fiber free of crystal defect layers perpendicular to the fiber axis
US5047500A · kind A · utility
5Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Oct 23, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Oct 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A fiber product comprising one or more fibers of aromatic polyamide polymer having a microscopic structure of an extended molecular chain, free of crystal defect layers perpendicular to the fiber axis, a high inherent viscosity of at least 3.0 [dl/g], and a high tensile strength of at least 15 g/d, said inherent viscosity being determined at 30.degree. C. using a concentration of 0.5 grams of said polymer in 100 ml of concentration sulfuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.