Producing high tenacity, high modulus crystalline article such as fiber or film
US4551296A · kind A · utility
128Cited by
17References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Jan 20, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Solutions of ultrahigh molecular weight polymers such as polyethylene in a relatively non-volatile solvent are extruded through an aperture at constant concentration through the aperture and cooled to form a first gel of indefinite length. The first gels are extracted with a volatile solvent to form a second gel and the second gel is dried to form a low porosity xerogel. The first gel, second gel or xerogel, or a combination, are stretched. Among the products obtainable are polyethylene fibers of greater than 30 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.