Pulp-like short fibers from liquid crystal polyesters
US5454910A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1994 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Sep 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2904
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Pulp-like short fibers prepared from liquid crystal polyesters capable of forming an anisotropic melt phase at a temperature of 200.degree. C. to 400.degree. C. and having a molecular weight of 2,000 to 100,000 are provided. These fibers consist of microfibrils and have the following highly-oriented fiber characteristics and properties: PA0 (a) Tensile strength: 5-30 g/den.; PA0 (b) Modulus of elasticity: 200-1,500 g/den.; PA0 (c) Orientation angle as determined by an X-ray diffraction: below 20.degree.; PA0 (d) Thickness distribution: 0.1-50 .mu.m; PA0 (e) Length distribution: 0.1-50 mm; and PA0 (f) Specific surface area as determined by a nitrogen adsorption method: 3-30 m.sup.2 /g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.