| Titre : |
New liquid crystal polyester filament yarns |
| Type de document : |
texte imprimé |
| Auteurs : |
Kota Nakamura, Auteur ; Ryosuke Sakae, Auteur ; Hisatoshi Tanaka, Auteur ; Munekazu Matoba, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 174-175 |
| Langues : |
Anglais (eng) |
| Catégories : |
Essais de résilience
Fibres textiles -- Propriétés physiques
Fibres textiles synthétiques
Flexion (mécanique)
Fluage
Morphologie (matériaux)
PolyarylatesLes polyarylates (PAR) sont une famille de polymères thermoplastiques techniques à propriétés thermomécaniques élevées. Ils comportent un enchaînement de cycles aromatiques très stables liés par des liaisons ester (CO-O). Ce sont donc des polyesters aromatiques.
Polyesters
polymères cristaux liquides
|
| Index. décimale : |
677.4 Textiles artificiels |
| Résumé : |
Since the development of aramid fibers by DuPont, several companies have conducted research into the possibility of meltspinnable polyarylate fibers. In the present day, Liquid Crystal Polyester (LCP) fibers, which are made from a polymer consisting of 6-hydroxy-2-naphthoic acid and hydroxybenzoic acid using Celanese technology, have been placed on the market by Kuraray. LCP fibers are a kind of super-fibers, and can be obtained by melt-spinning and then shifting to heat treatment for solid state polymerization in the form of fibers, which gives superior performance to fibers such as higher level of tenacity, modulus, wet strength, etc. The reason why only a limited number of manufacturers could produce them is in the difficulty of its spinning and heat treating processes, though LCP filament yarns have interesting characteristics. However, Toray Industries has succeeded in the development of new LCP filament yarns named Siveras which are based on polymer different from existing LCP fibers. Toray is able to produce both LCP polymer and fibers. Siveras is developed by the combination of polymer technology and original spinning processes which contributed in creating unique characteristics. |
| Note de contenu : |
- Fig. 1 : Physical properties of Siveras
- Fig. 2 : Creep property of Siveras
- Fig. 3 : Strength retention ratio of several super fibers after twisting at twist factor 80
- Fig. 4 : Morphology of super fibers after at twist factor 80
- Fig. 5 : Strenght and strenght ratio of various super fibers in rope product
- Fig. 6 : Strenght and strenght ratio after bending repeatedly under 0.88 cN/dtex load |
| En ligne : |
https://drive.google.com/file/d/1xPb7RCUQaJm46s2BqPHDO8xRgUZZSn-J/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31351 |
in CHEMICAL FIBERS INTERNATIONAL > Vol. 68, N° 4 (12/2018) . - p. 174-175
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