Process for the manufacture of polyamide fibers
US4624816A · kind A · utility
8Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1984 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | May 31, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the manufacture of polyamide fibers including melt spinning a polyamide having a relative viscosity of not less than 3.50 under conditions satisfying the following relationships: EQU Q/D.sup.3 .ltoreq.982 g/sec.cm.sup.3 EQU D.sup.2.Vw/Q.ltoreq.12.8 cm.sup.3 /g EQU T.sub.20 .gtoreq.100.degree. C. EQU .DELTA.n of unstretched filaments.ltoreq.0.017 The resultant filaments are then subjected to cooling, stretching and heat treatment resulting in fibers with a break strength of not less than 11.0 g/d, a break strength.times.(break elongation(%))1/2 of not less than 46.0 and a monofilament denier of not more than 60 d.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.