Synergies from the screw / Elmar Moritzer in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 12 (12/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 12 (12/2018) . - p. 34-37 Titre : Synergies from the screw : Improved characteristics with lower costs through the direct extrusion of long fibers Type de document : texte imprimé Auteurs : Elmar Moritzer, Auteur ; Frank Altendorf, Auteur ; Marius Wittke, Auteur Année de publication : 2018 Article en page(s) : p. 34-37 Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Propriétés mécaniques Composites à fibres longues Homogénéisation (technologie) Matières plastiques -- Extrusion Polypropylène Index. décimale : 668.4 Plastiques, vinyles Résumé : Compounds with long fiber reinforcement are easier to process, but also more expensive than using fibers and granulate separately. Not only can the direct compounding of fibers and plastics during extrusion reduce costs, the characteristics can also be improved due to longer fibers. The secret of a simplified plant concept lies in the screw. Note de contenu : - The fiber length is crucial - Gentle homogenization with a special screw - Producing better material at lower cost - Homogenous fiber distribution through counter-pressure - Fig. 1 : Standardized mechanical properties of glass fiber-reinforced PP in reference to different fiber lengths - Fig. 2 : Prototype of the direct compounding line in the technical center of KTP - Fig. 3 : Attainable fiber lengths in direct compounding at different counter-pressures (rotational speed n=40rpm, T=250°C - Fig. 4 : Attainable fiber lengths (mean value) at a higher material temperature of 270°C and a rotational speed of 40 rpm - Fig. 5 : Attainable fiber lengths (mean value) at a fiber proportion of 30 % by weight (rotational speed n =40 rpm, T =270 °C) - Fig. 6 : Attainable homogeneity at a fiber proportion of 30% by weight - Fig. 7 : Influence of the rotational speed on the mean fiber length at 270°C and a glass fiber proportion of 30% En ligne : https://drive.google.com/file/d/18K7UHWr5b25e1ees7KT5JKvQBdmxxQLd/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31421 [article]

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