Process for producing highly oriented undrawn polyester fibers
US5849232A · kind A · utility
8Cited by
8References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2931
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing highly oriented undrawn core-sheath type conjugated polyester fibers including the step of spinning a polyester as the sheath polymer and a polymer having a larger gradient of elongational viscosity with the temperature than that of the sheath polymer as a core polymer at a spinning speed of about 4000 to 12000 m/min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.