| Autor: |
Wang, I.-C., Dobb, M. G., Tomka, J. G. |
| Předmět: |
|
| Zdroj: |
Journal of the Textile Institute; 1995, Vol. 86 Issue 3, p383-392, 10p, 7 Charts, 2 Graphs |
| Abstrakt: |
Extensive studies concerning the spinning and drawing of polypropylene have resulted in the identification of an industrially feasible pathway for the production of fine (< 0.6 tex) very high tenacity fibres (85 cN/tex). Essentially, as-spun fibres are produced from a low molecular weight polymer (MFI 35 g/10min) extruded at 280°C with a winding speed of 200 m/min. These paracrystalline fibres of low orientation are then .subjected to a two-stage drawing process. The first stage, carried out at 60°C, results in oriented paracrystalline fibres which are then, during the second stage, transformed at a temperature of 140°C into highly oriented monoclinic fibres. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
