Process for manufacturing highly oriented amorphous polyester filament yarns
US5227110A · kind A · utility
1Cited by
5References
1Claims
0Family size
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Key dates
| Filing date | May 23, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | May 23, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/62
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a process for manufacturing fast-spin highly oriented amorphous polyester filament yarns, the shock cooling is achieved by means of a rotating cooling surface formed by the contact surface of a cooling cylinder. Filament yarns having a desired boiling shrinkage up to 70% and a birefringence larger than 0.08 can be obtained by varying the duration of contact between the filament yarns and the cooling cylinder and/or the distance between the spinneret and the cooling cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.