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The polymer film casting process - An overview / Y. Demay in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 3 (2021)
[article]
Titre : The polymer film casting process - An overview Type de document : texte imprimé Auteurs : Y. Demay, Auteur ; Jean-François Agassant, Auteur Année de publication : 2021 Article en page(s) : p. 264-275 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Films coulés
Films plastiques
Matières plastiques -- Défauts
Matières plastiques -- Extrusion
Modèles numériquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Cast film extrusion allows producing technical polymer films for packaging and coating applications. Different kinds of defects may be observed. For packaging applications, the challenge is to obtain very thin films in stable conditions at the highest throughput. For coating applications, the challenge is to master the film width reduction (called neck-in) and the induced non-uniform film thickness (called dog-bone defect). Well instrumented experiments point out the influence of the polymer and of the processing conditions on the occurrence of these defects. Numerical models of increasing complexity allow capturing the main experimental features and this makes possible to propose technological solutions to delay or even to suppress defects occurrence. Note de contenu : - EXPERIMENTS : Non-dimensional numbers - Stationary experiments - Non-stationary experiments
- NUMERICAL MODELLING : Constant width models - Membrane models - Coupled extrusion-stretching modelsDOI : https://doi.org/10.1515/ipp-2020-4061 En ligne : https://drive.google.com/file/d/10LVeORGEFd57b0lFCu0vJuBG-RavhAvT/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36369
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 3 (2021) . - p. 264-275[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23733 - Périodique Bibliothèque principale Documentaires Disponible The role of organoclay on in-situ microfibril formation of epoxy in poly(butylene terephtalate) nanocomposites / M. M. Salehi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 2 (05/2013)
[article]
Titre : The role of organoclay on in-situ microfibril formation of epoxy in poly(butylene terephtalate) nanocomposites Type de document : texte imprimé Auteurs : M. M. Salehi ; Hossein Nazockdast ; G. R. Pircheraghi Année de publication : 2013 Article en page(s) : p. 199-206 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Epoxydes
Extrusion filage
Fibrillation
Matériaux hybrides
Matières plastiques -- Extrusion:Polymères -- Extrusion
Polybutylène téréphtalateIndex. décimale : 668.9 Polymères Résumé : The main objective of the present work was to study the role of organoclay on the microfibrillation process of epoxy phase in Poly(butylene terephtalate), PBT, matrix both in presence and absence of epoxy curing agent. The PBT/epoxy blend samples with constant blend ratio (60/40) were prepared by melt mixing in a twin screw extruder. The elongational flow imposed by drawing the extrudate at the die exit permitted controlled generation of fibrile morphology of the dispersed epoxy phase, with a fiber diameter of 0.8 lm and an aspect ratio greater than 100. It was shown that when the curing agent was added into the extruder, its reactivity with epoxy at high temperature was high enough and selectively affected on the epoxy phase. The SEM results showed smaller epoxy droplet size for samples containing nanoclay compared to simple blends. This could be explained in terms of hindrance effect of nanoclay in reducing the coalescence as a dominating parameter due to presence of nanoclay in both phases. These results were supported by the melt linear viscoelastic results which showed enhanced low frequency viscosity and storage modulus for these samples. Addition of nanoclay was found to have little effect on extent of fibrillation epoxy droplet in stretched samples. The rheological results obtained for stretched samples showed very strong increase in low frequency solid body response whose extent was increase with increasing draw ratio. This mainly attributed to special 3-D network formed between microfibrils whose shape was stabilized by either presence of nanoclay or accelerated curing process of fibrillated epoxy. From SEM micrographs and linear viscoelastic measurements it can be deduced that curing process has small changes on the extent of fibrillation epoxy droplet in stretched samples. But it leads to improvement of interfacial interaction between two phases in the nanocomposites. Note de contenu : - EXPERIMENTAL/MODELING/SIMULATION : Materials - Sample preparation - Sample characterization
- RESULTS AND DISCUSSION : Residence time distribution in extruder and kinetics of epoxy curing - PBT/epoxy blendsDOI : 10.3139/217.2681 En ligne : https://drive.google.com/file/d/1LutPvUwI20tFsaMar7vQOg7LG7x8AM5O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18433
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 2 (05/2013) . - p. 199-206[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15050 - Périodique Bibliothèque principale Documentaires Disponible The torque of the twin screw / Peter von Hoffmann in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 9 (09/2011)
[article]
Titre : The torque of the twin screw Type de document : texte imprimé Auteurs : Peter von Hoffmann, Auteur ; Frank Lechner, Auteur Année de publication : 2011 Article en page(s) : p. 35-38 Langues : Anglais (eng) Catégories : Extrudeuse bi-vis
Matières plastiques -- Extrusion
ProductivitéIndex. décimale : 668.4 Plastiques, vinyles Résumé : Compounding - The ZSK MC18intermeshing, co-rotating twin screw extruder boasts the highest specific torque rating currently available on the market, enabling as much as a 30 % increase in throughput. This means greater productivity and a further improvement in compound quality – not to mention great flexibility for all types of use. Note de contenu : - Fast return on investment
- The improvements in detail
- Improved compound quality and increased output
- Peripheral equipment for increasing performance
- Rapid market acceptancePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15023
in KUNSTSTOFFE INTERNATIONAL > Vol. 101, N° 9 (09/2011) . - p. 35-38[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13328 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : The wave must be right : Screw concepts for extrusion Type de document : texte imprimé Année de publication : 2023 Article en page(s) : p. 52-54 Langues : Anglais (eng) Catégories : Matières plastiques -- Extrusion
Mélange
Plastification
Vis d'extrusion
Vis de plastificationIndex. décimale : 668.4 Plastiques, vinyles Résumé : The University of Paderborn, Germany, investigated the mixing effect of several wave screws in comparison with two barrier screws and a 5-section screw. The project will provide information on which screws perform better in the comparison and how to increase the efficiency of extrusion lines. Note de contenu : - Characteristics of wave screws
- Specifics of the et screw
- Mixing processes in single-screw extrusion
- Experiment execution
- The mixing quality on the scanner
- On the wave to successful mixingEn ligne : https://drive.google.com/file/d/1hOEMuic0fSgJGDmsNsxPNkDd2npQT4mn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40336
in PLASTICS INSIGHTS > Vol. 113, N° 7 (2023) . - p. 52-54[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24187 - Périodique Bibliothèque principale Documentaires Disponible Today packaging, tomorrow raw material / Jochen Mitzler in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 10 (10/2019)
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Titre : Today packaging, tomorrow raw material : At the K. KraussMaffei will be showing the cycle from product to upcycling to a new product Type de document : texte imprimé Auteurs : Jochen Mitzler , Auteur ; Carl-Philip Pöpel, Auteur ; Stefan Kruppa, Auteur Année de publication : 2019 Article en page(s) : p. 100 Langues : Anglais (eng) Catégories : Durée de vie (Ingénierie)
Économie circulaireL'économie circulaire est une expression générique désignant un concept économique qui s'inscrit dans le cadre du développement durable et s'inspirant notamment des notions d'économie verte, d’économie de l'usage ou de l'économie de la fonctionnalité, de l'économie de la performance et de l'écologie industrielle (laquelle veut que le déchet d'une industrie soit recyclé en matière première d'une autre industrie ou de la même).
Son objectif est de produire des biens et services tout en limitant fortement la consommation et le gaspillage des matières premières, et des sources d'énergies non renouvelables ;
Selon la fondation Ellen Mac Arthur (créée pour promouvoir l'économie circulaire1), il s'agit d'une économie industrielle qui est, à dessein ou par intention, réparatrice et dans laquelle les flux de matières sont de deux types bien séparés ; les nutriments biologiques, destinés à ré-entrer dans la biosphère en toute sécurité, et des intrants techniques ("technical nutrients"), conçus pour être recyclés en restant à haut niveau de qualité, sans entrer dans la biosphère
Matières plastiques -- Appareils et matériel
Matières plastiques -- Extrusion
Matières plastiques -- Moulage par injection
Matières plastiques -- RecyclageIndex. décimale : 668.4 Plastiques, vinyles Résumé : Paint bucket or A-pillar finisher? In our thoughts and attribution of value, packaging items and high-tech components often represent opposites. Yet the two can complement one another – when you look at used packaging as a valuable raw material. At the fair, KraussMaffei will be showing the concept for a closed material cycle and is making plastics processing sustainable through this. The machine manufacturer will have three business units working hand-in-hand there: Injection Molding Machinery, Extrusion Technology and Digital & Service Solutions. Note de contenu : - Upcycling provides for premium-quality recompounds
- A-pillar paneling : no wrinkles and no visible edges
- Seamless traceability of each component's path through the process
- New multi-interface
- Sustainability becomes measurable
- Fig. 1 : A bucket becomes an A-pillar : at K 2019, KraussMaffei is demonstrating a closed material and manufacturing cycle composed of extrusion and injection molding technology in combination with digital solutions
- Fig. 2 : The speed option of the new GX 1100 ensures high speeds during injection and fast mold movements
- Fig. 3 : The ZE 28 BluePower twin screw extruder turns secondary raw material into new and technically refined granulate
- Fig. 4 : The A-pillar finisher with textile surface is manufactured on an all-electric PX 320 injection molding machine
- Fig. 5 : Wrinkle-free production : the ten separate, individually movable needle grippers and eleven strokes allow for safe insertion and clamping of the decoration of the A-pillar finisher
- Table 1 : The partner network for the cycle from bucket to A-pillar finisherEn ligne : https://www.kunststoffe.de/en/journal/archive/article/9543481 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33800
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 10 (10/2019) . - p. 100[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21238 - Périodique Bibliothèque principale Documentaires Disponible Toughening of polylactide by bio-based and petroleum-based thermoplastic elastomers / Y. Meyva in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 5 (11/2015)
PermalinkTubing extrusion of a fluoropolymer melt / Evan Mitsoulis in INTERNATIONAL POLYMER PROCESSING, Vol. XXVII, N° 2 (05/2012)
PermalinkTubular film extrusion stability of metallocene linear low density polyethylene / K. Kim in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 1 (03/2006)
PermalinkTwo colors in one die / Oliver Te Heesen in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 4 (04/2012)
PermalinkUsing flash DSC technology to verify structural changes / Jürgen E. K. Schawe in KUNSTSTOFFE INTERNATIONAL, Vol. 104, N° 4 (04/2014)
PermalinkVirtual melting and feed section design / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 10 (10/2013)
PermalinkViscoelastic effects in multilayer polymer extrusion / Patrick D. Anderson in APPLIED RHEOLOGY, Vol. 16, N° 4 (2006)
PermalinkDes vitesses d'exécution de plus en plus élevées / Jean Guilhem in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 862 (11/2008)
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