| Titre : |
New approach to the meltblown-paradox |
| Type de document : |
texte imprimé |
| Auteurs : |
Christopher Bruns, Auteur ; Axel Nickel, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 62-64 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Procédé de fusion-soufflage (nontissés)
|
| Index. décimale : |
677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés |
| Résumé : |
The meltblown process was developed 70 years ago by petrochemical company ExxonMobil Chemical Co., Houston, TX/USA. Nevertheless, there is still no common understanding among experts as to how the very fine filament diameters in the range of a few micrometers (pm) are produced. The existing air velocities in the subsonic range are in any case not sufficient to explain the filament velocities of up to several km/s that are necessary to achieve such fine filaments. This paper will present a new approach that Fiber-To-Go is pursuing. It is already known that there must be a "post-stretching". However, the cause of this phenomenon has not yet been clarified. The authors assume a high-frequency oscillation of the filaments caused by the merging of the 2 air streams at the nozzle tip during the "Exxon-process". |
| Note de contenu : |
- Determination of the flow velocities of the primary air
- Formation of a Karman vortex street
- High-speed video recording and sound pressure measurement
- Fig. 1 : Meltblown process and enalrgement process on the basis of the filament forces acting in the primary air stream, using the Exxon process
- Fig. 2 : Velocity distribution of the primary air and the corresponding measurement and simulation curves of the velocities below the nozzle
- Fig. 3 : Oscillation pattern of the filaments in the side view (x-y) and the front view (x-z) |
| En ligne : |
https://drive.google.com/file/d/1F1zI1Aaz0MdGO9C1TtVT5md6zKKs9kAu/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38412 |
in CHEMICAL FIBERS INTERNATIONAL > (10/2022) . - p. 62-64
Aller sur edunet
Accueil
New approach to the meltblown-paradox in CHEMICAL FIBERS INTERNATIONAL, (10/2022)
