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Agglomerate-free compounding / Theresa Fischer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 8 (08/2019)
[article]
Titre : Agglomerate-free compounding : Comparison of two techniques to produce thermoplastic-nanoparticle-composites Type de document : texte imprimé Auteurs : Theresa Fischer, Auteur ; Matthias Wilhelm, Auteur ; Florian Fechter, Auteur ; Markus Eblenkamp, Auteur ; Johannes Rudloff, Auteur ; Marieluise Lang, Auteur ; Thomas Hochrein, Auteur ; Martin Bastian, Auteur Année de publication : 2019 Article en page(s) : p. 41-43 Langues : Anglais (eng) Catégories : Compoundage
Matières plastiques -- Additifs
Matières plastiques -- Extrusion
Mélanges (chimie)
Nanoparticules
ThermoplastiquesUne matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire.Index. décimale : 668.4 Plastiques, vinyles Résumé : Often pure plastic materials are not able to fulfill the increasing demands of plastic component. It is therefore necessary to adapt the properties of the plastics by adding other polymers or additives. Note de contenu : - Customized properties due to nanoparticles
- Production of nanocomposites
- Analysis of the extrudated compounds
- Fig. 1 : Comparison of compounding techniques : feed units and its key data
- Fig. 2 : REM-EDX-figures of the specimens examined
- Table 1 : Additive content ald L*-value of the specimens examinedEn ligne : https://www.kunststoffe.de/en/journal/archive/article/comparison-of-two-techniqu [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33307
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 8 (08/2019) . - p. 41-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21074 - Périodique Bibliothèque principale Documentaires Disponible Direct route to the PVC profile / Serhiy Yatsenko in KUNSTSTOFFE INTERNATIONAL, Vol. 111, N° 5 (2021)
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Titre : Direct route to the PVC profile : Extrusion of rigid PVC without dry blend production Type de document : texte imprimé Auteurs : Serhiy Yatsenko, Auteur ; Johannes Rudloff, Auteur ; Marc Waffenschmidt, Auteur ; Marieluise Lang, Auteur ; Thomas Hochrein, Auteur ; Martin Bastian, Auteur Année de publication : 2021 Article en page(s) : p. 41-45 Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Extrudeuse à rouleau planétaire
Matières plastiques -- Extrusion
ProfilésIndex. décimale : 668.4 Plastiques, vinyles Résumé : Before the direct extrusion of profiles made of polyvinyl chloride was developed, it was previously necessary to produce a dry blend. This process is expensive and energy-intensive and, in contrast to direct extrusion, discontinuous. The direct extrusion of PVC using planetary roller extruders promises an improvement. In addition to soft PVC, rigid PVC can also be processed in this way with a few adjustments. Note de contenu : - Potential savings due to planetary roller extruders
- Challenges in setting up the direct extrusion line
- PVC granulates as alternatives to dry blends
- Which pressure build-up unit is suitable ?
- Successful tests of the prototype line
- Figure : The direct extrusion of PVC profiles on planetary roller extruders can save costs and energy and simplify the process
- Fig. 1 : Schematic view of a process module of the PRE: several planetary spindles rotate around the temperature-controlled central spindle in a temperature-controlled cylinder assembly
- Fig. 2 : With current PRE types, several process modules are connected in series. Moreover, additional systems for process improvement can be integrated
- Fig. 3 : The two-module PRE has already proven itself for soft PVC. A few adjustments were necessary for processing rigid PVC
- Fig. 4 : Schematic view of the direct extrusion line for rigid PVC: a connected pressure build-up unit provides the pressure required for extrusion
- Fig. 5 : Results of the gel permeation-chromatographic test with the two-module PRE set-up: the mean molar mass of the three samples is largely identical
- Fig. 6 : The sample PRE has a slightly lower tensile strength than the samples processed in the other two processes
- Fig. 7 : In the tests of the Charpy impact strength, the sample processed in the PRE fell significantly below the other two. However, if three modules are used instead of two, it even achieves better values
- Fig. 8 : With the installed line, a direct extrusion of rigid PVC using planetary roller extruders is possibleEn ligne : https://drive.google.com/file/d/1YXaha4wtLy2FjyADD6qR6THm6_yZWiEt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36169
in KUNSTSTOFFE INTERNATIONAL > Vol. 111, N° 5 (2021) . - p. 41-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22860 - Périodique Bibliothèque principale Documentaires Disponible Foamed and still extruded in one step / Christina Hoffmann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 9 (2020)
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Titre : Foamed and still extruded in one step : Method for the simultaneous extrusion of window profiles with a foam core Type de document : texte imprimé Auteurs : Christina Hoffmann, Auteur ; Johannes Rudloff, Auteur ; Christian Eck, Auteur ; Eduard Kraus, Auteur ; Thomas Hochrein, Auteur ; Hermann Achenbach, Auteur ; Marieluise Lang, Auteur ; Martin Bastian, Auteur Année de publication : 2020 Article en page(s) : p. 18-21 Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Durée de vie (Ingénierie)
Micrographie
Microscopie électronique à balayage
Mousses plastiques -- Extrusion
Polymères expansés
PolystyrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Foamed polystyrene in window profiles and façade elements can improve their thermal insulation and there-fore their environmental efficiency. Simultaneous extrusion of polyvinyl chloride profiles with a PS foam core is challenging due to the different processing conditions and has not been performed before. A trial plant for researching this process has now been set up at the SKZ. Note de contenu : - One-step process for foam-filled profiles
- Homogeneous and fine-celled foam structure
- Processing in a tandem extrusion line
- Problems with the die
- Welding of foam-filled profiles
- How sustainable is the process ?
- Environmental life-cycle analysis
- Fig. 1 : The foaming of PS was investigated in a test system developed for this purpose
- Fig. 2 : SEM micrograph of a foam sample with graphite as nucleation agent with 150x magnification : the closed-cell, highly homogeneous and fine-celled structure of the foams is good to see
- Fig. 3 : The tandem extrusion system permits extrusion of PVC profiles with foamed PS core
- Fig. 4 : Front view of the extrusion die with frame radiator : the mold combines PVC profile extrusion with PS foam extrusion
- Fig. 5 : Simulated pressure and viscosity profiles for the PVC flow channel of the die and the PS flow channel
- Fig. 6 : Specific energy consumption of the individual components based on 1m of manufac-tured profileEn ligne : https://drive.google.com/file/d/139XZRUzHOndv0RWD3fX4RqNFTkf5o67M/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34822
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 9 (2020) . - p. 18-21[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22367 - Périodique Bibliothèque principale Documentaires Disponible The specialist for high-filled compounds / Christina Hirt in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 6-7 (06-07/2015)
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Titre : The specialist for high-filled compounds : Continuous compounding with counter-rotating, non-intermeshing rotors Type de document : texte imprimé Auteurs : Christina Hirt, Auteur ; Marieluise Lang, Auteur ; Peter Heidemeyer, Auteur ; Martin Bastian, Auteur ; Peter Gohl, Auteur Année de publication : 2015 Article en page(s) : p. 56-59 Langues : Anglais (eng) Index. décimale : 668.4 Plastiques, vinyles Résumé : For several years the German Plastics Centre SKZ and machine manufacturer Farrel Pomini, a member of the HF Mixing Group, have been working on the production of technical compounds in successful cooperation. For this purpose a CP125, Farrel Pominis smallest available continuous compounder with an approximate output of 125 kg/h, was set up in the SKZ testing laboratory. Note de contenu : - Application areas in change
- New application areas confirmed
En ligne : https://drive.google.com/file/d/1rtly_kmFNyn5tA7b9WEoCxubYkDh_EeN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24540
in KUNSTSTOFFE INTERNATIONAL > Vol. 105, N° 6-7 (06-07/2015) . - p. 56-59[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17368 - Périodique Bibliothèque principale Documentaires Disponible Understanding kneading holistically / Jochen Kettemann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 6 (2020)
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Titre : Understanding kneading holistically Titre original : Predict co-kneader behavior efficiently with procedural understanding Type de document : texte imprimé Auteurs : Jochen Kettemann, Auteur ; Christian Bonten, Auteur ; Rebecca Wolff, Auteur ; Johannes Rudloff, Auteur ; Marieluise Lang, Auteur ; Thomas Hochrein, Auteur ; Martin Bastian, Auteur Année de publication : 2020 Article en page(s) : p. 40-44 Langues : Anglais (eng) Catégories : Compoundage
Malaxeurs et mélangeurs
Polyéthylène
Polymères -- Fusion
Polystyrène
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thanks to its special working principle, the co-kneader fulfills top mixing requirements. Until now, however, its design could not be based on simulation, because processing knowledge and modeling approaches were lacking. Systematic investigation together with analytical and numerical models overcome this hurdle and provide the basis for computer-aided optimization. Note de contenu : - The co-kneader
- Experimental investigation
- Figure : A look inside the co-kneader whose behavior when processing polyethylene and polystyrene and polystyrene was simulated
- Fig. 1 : Power introduced and melt temperatures at the end of the extruder shown with various screw configuration at 8 kg/h throughput and 400 rpm
- Fig. 2 : Simplification of the calculation geometry with axial and radial boundaries using the example of a three-flight co-kneader (geometry 1)
- Fig. 3 : Simulated geometry variations : geometries 1 and 2 are three-flight co-kneaders, geometry 3 and 4 have 4 flights. The difference between geometry 1 and 2 is between flight width. Geometry 3 and 4 differ in respect to flight width and length
- Fig. 4 : Velocity profiles of characteristic flight positions of a four-flight co-kneader (geometry 3, KL element). The flow field was cut radially, a color scale shows the different velocities, arrows their direction
- Fig. 5 : Comparison of the average shear rates for geometries 1 to 4
- Fig. 6 : Comparison ofsimulated pressures, filling levels, and melting degrees of PE : conveying elements are interrupted in the screw drawing, and kneading elements are shown fully
- Fig. 7 : Comparison of simulated and measured values : The acumulated minimum or average dwell times and the powers, each for different operating points with PE as the matrix material
- Fig. 8 : Velocity field of a three-dimensional co-kneader simulation (four-flight kneader : geometry 3) in OpenFoam with real screw motion using the Immersed boundary Surface methodEn ligne : https://drive.google.com/file/d/1bhvfMlKf5O1WUijrt0SdSzP2wYPFghIP/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34716
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 6 (2020) . - p. 40-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21871 - Périodique Bibliothèque principale Documentaires Disponible