Pre-stressing of heat treated liquid crystalline polymer fiber to improve modulus
US5472658A · kind A · utility
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9References
21Claims
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Key dates
| Filing date | Dec 22, 1993 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Dec 22, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02J1/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The tensile modulus of fibers made from liquid crystalline polymers comprising 6-oxy-2-naphthoate and 4-oxybenzoate monomer units that have been heat treated can be increased by applying and then releasing a stress at room temperature in the range of about 25% to about 90% of the tensile strength of the heat treated fiber to yield a "pre-stressed" fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.