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KUNSTSTOFFE INTERNATIONAL . Vol. 109, N° 6-7Mention de date : 06-07/2019Paru le : 27/08/2019 |
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Ajouter le résultat dans votre panierAn irreplaceable additive / Ingo Sartorius in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : An irreplaceable additive : USe and recovery of TiO2 in plastics products Type de document : texte imprimé Auteurs : Ingo Sartorius, Auteur ; Ulrich Schlotter, Auteur Année de publication : 2019 Article en page(s) : p. 6-8 Langues : Anglais (eng) Catégories : Dioxyde de titane
Matières plastiques -- Additifs
Matières plastiques -- Recyclage
ProductionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Every year, several million tons of titanium dioxide are produced worldwide and added to, among other things, plastics products as well as to paints and dyes, food, cosmetic products or medicines. The EU Commission is currently considering the classification of titanium oxide as a suspicious substance which may potentionally cause cancer. A current study provides well-founded data on the use and recovery of titanium dioxide in plastics processing and recycling. Note de contenu : - Detailed analysis in three steps
- Specialist interviews along the value chain
- TiO2 consumption in plastics applications and waste
- Assessment by market stakeholders
- Fig. 1 : The study has qualified i.a. waste streams with respect to their TiO2 content. Only post-consumer waster were considered
- Fig. 2 : Titanium dioxide use in plastics conversion in Germany [kt]
- Table 1 : Distribution of TiO2 in plastic wastes
- Table 2 : TiO2 containing wastes relevant for the study according to their waste code number (code numbers with * indicate hazardous wastes ; the totalEn ligne : https://drive.google.com/file/d/1mpW43xsm-gBBtX9j-iCoM1w2feIYu_97/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32974
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Locally reinforced auto body parts / Kira van der Straeten in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Locally reinforced auto body parts : Laser based production methods make hybrid parts practicable Type de document : texte imprimé Auteurs : Kira van der Straeten, Auteur ; Christian Kukla, Auteur Année de publication : 2019 Article en page(s) : p. 12-14 Langues : Anglais (eng) Catégories : Automobiles -- Carrosseries
Composites à fibres
Matériaux hybrides
Matières plastiques dans les automobiles
Pose de rubans automatisée
Production en série
Rubans adhésifs
Structuration directe par laserIndex. décimale : 668.4 Plastiques, vinyles Résumé : - Laser micro structuring improves bonding properties
- Laser-assisted tape-laying for local reinforcement
- Combined method, suitable for mass production
- Figure : Laser structuring : high-intensity laser beams evaporate local metal, thereby creating micro structures with undercuts. Fiber composite plastics can then bond well to pre-treated surfaces by mechanical clawing
- Fig. 1 : CAD design of the polygon-based scanner system
- Fig. 2 : Continuous laser structuring process of a car body part
- Fig. 3 : Schematic illustration of the tape laying process
- Fig. 4 : ComMUnion tape-laying head : Side CAD design and with VCSEL
- Fig. 5 : Portion of a hybrid door still : the part is functionalized by laser-supported tape layingNote de contenu : There is growing demand for suitable cost-effective ways to mass produce lightweight parts. Together with 14 other partners from industry and research, the Fraunhofer Institutes for Production and Laser Technology – IPT and ILT in Aachen, Germany – are developing industrial processes for the production of parts made from metals and fiber composite plastics. En ligne : https://drive.google.com/file/d/1g6IYLukqn6HPolgkA99OuLJQ6c04leSh/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32975
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Welded from the ends : Advanced laser butt welding for joining high-wall and same-material parts Type de document : texte imprimé Auteurs : Christian Class, Auteur ; Matthias Greif, Auteur ; Tobias Beiss, Auteur Année de publication : 2019 Article en page(s) : p. 15-17 Langues : Anglais (eng) Catégories : Matières plastiques -- Soudage
Soudage laserIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thanks to technical advances which have made implementation easier, laser butt welding which was invented in the 1990s is now about to make the breakthrough. Aside from high-wall parts, it can be used to weld same-material polymers using precision laser technology. Note de contenu : - Advantages and disadvantages laser transmission welding
- The alternative : laser butt welding
- Further development of laser butt welding
- Conclusion : conventional technique and laser welding in combination
- Fig. 1 : Functional principle : in conventional laser butt welding, the aligned part were heated by means of deflecting mirrors which were positioned between them and had to be returned to the home position prior to joining
- Fig. 2 : More laser power is required as the weld seam gets longerEn ligne : https://drive.google.com/file/d/1W4DE8kSCQAezOeqepUVwX6F17-m8PIzT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32976
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Matt is the shinning / Frank Krabbenborg in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Matt is the shinning : Laser-grained styrene surfaces for automotive interiors and exteriors parts Type de document : texte imprimé Auteurs : Frank Krabbenborg, Auteur Année de publication : 2019 Article en page(s) : p. 18-19 Langues : Anglais (eng) Catégories : Brillance (optique)
Copolymère styrène-acrylonitrile
Gravure
Lasers -- Applications industrielles
Matières plastiques dans les automobiles
Terpolymère acrylonitrile butadiène styrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : Due to their high-gloss surfaces, ABS and SAN copolymers are classically used in claddings, dashboards and panels. A new development cooperation has now investigated a wide range of these materials for different surface designs using lasers. This could open up new applications for these materials, for example in automotive interiors. Note de contenu : - Fig. 1 : The 16 different laser-engraved surface structures tested on the styrene copolymers
- Fig. 2 : Surface gloss of the tested styrene polymers on the structures shown in Fig. 1 (gloss 60). Grains 2 and 12 show no influence of the material type on the gloss 60 valueEn ligne : https://drive.google.com/file/d/1WMHNYpK52wN0qexUjQou5yS74mOx-80O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32977
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible New illumination of plastics / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
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Titre : New illumination of plastics : yarn-friendly injection molding process for back molding of optical textiles Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Hanna Dornebusch, Auteur ; Richard Müller, Auteur ; Anja Zwissler, Auteur Année de publication : 2019 Article en page(s) : p. 20-23 Langues : Anglais (eng) Catégories : Composites à fibres
Fibres textiles -- Propriétés optiques
Matières plastiques -- Moulage par injection
Matières plastiques -- Surmoulage
Photométrie
Polycarbonates
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 668.4 Plastiques, vinyles Résumé : Certain optical textiles can create a three-dimensional light effect from an LED light source. The textiles are used in interior design and in booth construction and are stretched freely on frames for this purpose. In order to protect the fabric from external influences, it should be back-molded with plastic. Thus a process that do not influence the textile structure must be developed. Note de contenu : - The challenge of back molding of optical textile
- Materials used
- Identification of plastic/textile combinations
- Draping tests for the design of a mold
- Fig. 1 : Functionality of the Ettlin Lux effect and installation : refractive and reflective effects on optically effective yarns create three-dimensional light structures from point-shaped light sources
- Fig. 2 : Schematic sequence of back molding of optical textile : after inserting the decor, the mold closes, the textile is back molded and the part ejected
- Fig. 3 : Structure of the roller peel test for investigating the bond strength between plastic and textile
- Fig. 4 : Peel resistance of PMMA influence of injection molding parameters melt temperature holding pressure and injection volume flow
- Fig. 5: Failure of the textiles during the test
- Fig. 6 : Evaluation of the photometric properties of the test specimens using the miracle textile as an example : the photometric effect of the plastic/textile combination is compared with previous clamping techniques without support or behind glass
- Fig. 7 : Investigations on the draping behavior of the textile on selected demonstrator shapesEn ligne : https://drive.google.com/file/d/1wldiZmatpgSrYfeQvDVTFeWzscKurvcD/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32978
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Aroma-tight and cost-effective / Bertram Stern in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Aroma-tight and cost-effective : Lapp Tech employs sustainable, efficient solutions for barrier capsules Type de document : texte imprimé Auteurs : Bertram Stern, Auteur Année de publication : 2019 Article en page(s) : p. 24-26 Langues : Anglais (eng) Catégories : Aliments -- Emballages
Emballages en matières plastiques
Matériaux -- Propriétés barrières
Matières plastiques -- Moulage par injectionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Single-serve capsules as used, for example, for coffee, are a booming product in the packaging sector. The latest generation of capsules is injection molded and includes an integrated barrier layer to conserve flavor and aroma while saving material compared to alternative manufacturing processes. These complex injection molding parts are produced in high volumes by a Swiss company using Arburg machines. Note de contenu : - Injection molding technology wins over traditional solutions
- Thin-wall technology with barrier encounters high cavity
- A holistic approachEn ligne : https://drive.google.com/file/d/1HUUznrCN-K7DbXRCvW0uKp5Osy7zLbpK/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32979
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Refining a proven platform : Husky : Advances in the injection molding of PET bottle preforms Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 27 Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques
Economies d'énergie
Matières plastiques -- Moulage par injection
Matières plastiques -- Moulage par injection -- Appareils et matériel
Polyéthylène téréphtalate
PréformesObjet constituant la majeur partie d’une pièce à fabriquer et qui nécessite un travail supplémentaire pour devenir une pièce finie. Ce terme s’utilise notamment pour le moulage, l’usinage, la taille d’outils en silex, la fabrication de fibre optique…Index. décimale : 668.4 Plastiques, vinyles Résumé : The injection molding system supplier Husky is launching its HyPET HPP5e. This is a refinement of the proven HPP platform, which, as a fully integrated system for the manufacture of PET preforms, is intended to obtain greater energy savings, system reliability, preform quality and user friendliness than its predecessor. Note de contenu : - Adaptive technology delivers energy savings
- Increased user friendliness thanks to optimized controlsEn ligne : https://drive.google.com/file/d/1bYA8odDlZkOLq0ao1W62NWYigUqKT9rX/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32980
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Control complex processes easily / Hannes Fritz in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Control complex processes easily : Tutorials directly on the operator panel of the injection molding machine Type de document : texte imprimé Auteurs : Hannes Fritz, Auteur ; Johann Voggeneder, Auteur ; Julia Gassner, Auteur ; Gerhard Dimmler, Auteur Année de publication : 2019 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Logiciels
Matières plastiques -- Moulage par injection -- Appareils et matériel
Procédés de fabrication
Production -- ContrôleIndex. décimale : 668.4 Plastiques, vinyles Résumé : With advanced process integration and a higher degree of automation, the complexity of injection molding processes is cumulative. This trend also increases the demand imposed on control technology. The clearer, more convenient and more intuitive the control system is for the operator, the safer and more efficient it can be to operate even large production plants and manufacturing cells that combine different technologies. Engel now goes one step further with tutorials integrated directly into the control of the injection molding machines. Note de contenu : - Intuitive operation and clear menu navigation
- Crash course on the control display
- Quickly record and retain information
- Interactive through the sequence of events
- Tutorial offering keeps growingEn ligne : https://drive.google.com/file/d/1rCobYHQVaOfNN9XMcocbby9Zub-3NUGm/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32981
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Making it big with small bubbles / Gabriele Gorbach in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
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Titre : Making it big with small bubbles : Thermoplastic sandwich structures for large series applications Type de document : texte imprimé Auteurs : Gabriele Gorbach, Auteur ; Eugen Kübler, Auteur ; Anna-Carin Föhner, Auteur ; Claudia Daberger, Auteur ; Maik Gude, Auteur ; Juliane Troschitz, Auteur ; Michael Krahl, Auteur Année de publication : 2019 Article en page(s) : p. 31-35 Langues : Anglais (eng) Catégories : Composites à fibres -- Moulage par injection
Composites à fibres -- Thermoformage
Composites thermoplastiques
Construction sandwich
Matériaux -- Allègement
Mousses plastiquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : In addition to excellent mechanical characteristics and suitability for recycling, the key feature of hybrid lightweight structures made of fiber-reinforced thermoplastics is that automated, large series production is possible. New mold and process technologies were successfully developed within the scope of the ReLei research project, enabling the production of complex shaped sandwich elements in an efficient combined process. Note de contenu : - The newly developed foam forming technology
- Process-oriented component design
- Special tool and automation technology solutions
- Composite sheets are transferred on both sides of the mold
- Forming by injection pressure
- Fig. 1 : The newly developed foam forming technology combines thermoplastic foam injection molding with thermoforming of fiber-reinforced thermoplastics in one process
- Fig. 2 : The ReLei technology demonstrator is defined by its complex structure
- Fig. 3 : The handling system - here in the open state - transfers the composite layers from the heating device to the injection mold
- Fig. 4 : Process sequence in the mold during production of the technology demonstrator: a) insertion of the heated, partly stacked pre-cut composite sheets, b) injection of the plastic melt, c) local expansion stroke, d) component ejection
- Fig. 5 : Special tool functionality : a) ejector side of the demonstrator mold, b) detail of the expansion zones, c) detail of vacuum exhaustersEn ligne : https://drive.google.com/file/d/1PH0BJTT3qn_ygCbwW3b-gUvBUCT7kIRW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32982
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Longer shelf-life, less waste / Bettina Plaumann in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Longer shelf-life, less waste : Barrier materials protect food and make packaging more sustainable Type de document : texte imprimé Auteurs : Bettina Plaumann, Auteur ; Heiko Mack, Auteur ; Didier Houssier, Auteur ; Naoki Yoshida, Auteur ; Stefan Corbus, Auteur Année de publication : 2019 Article en page(s) : p. 36-37 Langues : Anglais (eng) Catégories : Aliments -- Conservation
Aliments -- Emballages -- Aspect sanitaire
Emballages en matières plastiques
Matériaux -- Propriétés barrières
Polymères -- BiodégradationIndex. décimale : 668.4 Plastiques, vinyles Résumé : Vast quantities of food are thrown away every year. Modern plastic packaging keeps food fresh and preserves its flavor for longer, so it reduces the amount of valuable produce that is wasted. At the same time, politicians are calling for more environmentally friendly packaging. Kuraray provides key barrier materials for this, including biodegradable polymers that are impermeable to gas. Note de contenu : - Protection against oxidation
- Environment-friendly printable barrier layers
- Biodegradable packaging with a gas barrier
- Fig. 1 : A layer of only four micrometers of Eval barrier copolymer prevents impurities such as mineral oil from recycled cartons contaminating food
- Fig. 2 : Softpack’s coffee packaging is biodegradable and impermeable to gas. The biodegradable barrier polymer Plantic is used in this packaging to keep out oxygen and make sure the coffee.
- Table 1 : Oxygen permeability of a PE film coated with Exceval and metalized, analyzed at 23°C and 65% relative humidity in100% oxygen. The barrier layer shows good properties even after 20-fold torsion of the film.En ligne : https://drive.google.com/file/d/1oKJBIyTAeru6Olt9CjcgJKbxqeWuDzHe/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32986
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Big data surmounts the barrier / Thomas Froese in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
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Titre : Big data surmounts the barrier : Predicting and controlling barrier properties with data analysis Type de document : texte imprimé Auteurs : Thomas Froese, Auteur ; Christoph Kugler, Auteur Année de publication : 2019 Article en page(s) : p. 38-40 Langues : Anglais (eng) Catégories : Analyse des données
Analyse multivariée
Emballages en matières plastiques
Films plastiques
Matériaux -- Propriétés barrières
Matières plastiques -- Extrusion
Procédés de fabrication
Production -- Gestion -- LogicielsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Many properties of plastic sheet and film can be effectively modeled and predicted by means of a structured methodology, and precisely controlled thanks to model-based multivariable control. Rejects are minimized and production costs considerably reduced. Note de contenu : - Sipac – the complete picture of the production data
- Data cleansing and modeling
- Soft sensors and smart process control
- Fig. 1 : Twin-screw extruder, slit die and roll with atline permeability measurement for acquiring the test data
- Fig. 2 : High precision of the model : comparison of the model prediction with test data
- Fig. 3 : Influence of model inputs on the permeability : the sensitivity analysis shows the maximum change of the permeability on change of an input by % of its value range
- Fig. 4 : Section through the 7-dimensional model (only one of the 6 inputs of the model is varied over the value range ; the others are kept at a mean value) : the example shows that the increase of a particular process temperature also increases the permeability. Model output and model fuzziness because of missing data setsEn ligne : https://drive.google.com/file/d/1Sx88b_DhIjWJGSPRCO5hNiHPsRNHRABM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32987
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : PET : from A to C : Upcycling of mixed APET bottle flakes into thermally stable rCPET food trays Type de document : texte imprimé Auteurs : Sven Engelmann, Auteur ; Christoph Stoye, Auteur ; Georg Sposny, Auteur ; Carl-Jürgen Wefelmeier, Auteur ; Daniel Ganz, Auteur ; Nicky Klammt, Auteur ; Janine Wyss, Auteur Année de publication : 2019 Article en page(s) : p. 41-43 Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques -- Recyclage
Emballages en matières plastiques
Extrudeuse à système multirotatif
Matières plastiques -- Additifs
Matières plastiques -- Extrusion
Matières plastiques -- Recyclage
Matières plastiques -- Thermoformage
Polyéthylène téréphtalateIndex. décimale : 668.4 Plastiques, vinyles Résumé : Enhancing mixed bottle flakes by turning them into extrudable recycled crystalling polyethylene terephthalate (rCPET) was the goal of a joint development project looking to close the gap in the PET recycling system. By successfully producing a sheedt made from recycled material suitable for high-quality applications such as thermoformed food trays, Gneuss, Sukano and Illig have demonstrated that this approach is indeed possible. Note de contenu : - Homogeneous melt with MRS extrusion
- Additives for color and crystallization
- rCPET food trays
- Extrusion of the sample sheets with different additives
- Process-controlled thermoforming technology
- Striking a balance between forming accuracy and thermal stability
- Oven tests in packaging lab
- In conclusion : potential for high-quality applications
- Figure : Thermally stable rCPET food trays made from multicolor APET bottle flakes
- Fig. 1 : Process overview : from multicolor APET bottle flakes to CPET for oven-safe food trays
- Fig. 2 : Multi rotation extruder system with satellite screws arranged around main screw
- Fig. 3 : Surface renewal for the decontamination of plastics : the MRS technology is 100 times more effective than conventional single-screw technology thanks to its satellite screws
- Fig. 4 : The timeline of the dynamic melt viscosity shows an increase from around 800 to 1000 Pa-s as a result of the addition of 1% rPET IV enhancer
- Fig. 5 : Chain-growth polymerization mechanism using the rPET IV enhancer
- Fig. 6 : Oven tests at 200°C for 20 min : rCPET trays ; upper heater at 250°C ; upper and lower heating lower heater at 270°C
- Fig. 7 : rCPET food trays made from material sheet 5 before and after the oven test at 270°C on upper and lower heater
- Table 1 : Material rolls with different additives
- Table 2 : Forming accuracy for the thermoforming test of the sample material rolls (control sample and rCPET) at different temperatures of upper and lower heaters (OHZ UHZ)En ligne : https://drive.google.com/file/d/1tEsSXTOfdquNUDWrN-qtGmz_JZ14TY7n/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32990
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Multifunctional material analysis / Xandra Puntigam in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
[article]
Titre : Multifunctional material analysis : From melt rheology to the mechanical properties of 3D-printed components Type de document : texte imprimé Auteurs : Xandra Puntigam, Auteur ; Alexander Troiss, Auteur Année de publication : 2019 Article en page(s) : p. 46-48 Langues : Anglais (eng) Catégories : Analyse mécanique dynamique
Essais dynamiques
Etat fondu (matériaux)
Impression tridimensionnelle
Mesure
Modélisation par dépôt en fusion
Polyéther éther cétone
Rhéologie
Transition vitreuseIndex. décimale : 668.4 Plastiques, vinyles Résumé : A multifunctional measuring unit combines rheological characterization with dynamic mechanical analysis. This enables extensive material characterizations to be carried out on a single instrument. Using the example of additive manufacturing of PEEK by fused deposition modeling (FDM), the material characterization of filament, melt, and final component is demonstrated. Note de contenu : - Use of rheometers to characterize PEEK
- Rheological measurement of the PEEK melt
- DMA measurement of the additive manufactured PEEK bars
- Figure : Plate-plate configuration (25 mm diameter) for rheological measurement of a polymer melt on the MCR 702 MultiDrive rheometer with a convection oven (CTD 600 MultiDrive Ready)
- Fig. 1 : Frequency sweep measurements of a PEEK melt. At +380 °C, the PEEK melt has a viscosity some 30 % lower than at +350 °C and is therefore better suited for FDM
- Fig. 2 : Solid rectangular fixture or SRF for temperature-dependent dynamic mechanical analysis of additive manufactured PEEK bars on the MCR 702 MultiDrive rheometer with a convection oven (CTD 600 MultiDrive Ready)
- Fig. 3 : Temperature-dependent DMA measurements of an FDM-processed PEEK filament. The shear modulus G is shown in red and the tensile modulus E in green ; measurement in tension is represented by the solid lines and in torsion by the dotted lines
- Fig. 4 : The glass transition temperature of PEEK according to ISO 11357 can be directly calculated with the aid of the softwareEn ligne : https://drive.google.com/file/d/19uRuVTgWDvswLGZJA2YTqs-7xJPnUgJ4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32991
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Titre : Friction-free covering layer : Slide modification of POM with PTFE microparticles (Part 2) Type de document : texte imprimé Année de publication : 2019 Article en page(s) : p. 49-52 Langues : Anglais (eng) Catégories : Essais dynamiques
Lubrifiants
Particules (matières)
Polyacétals
Polyoxyméthylène
Polytétrafluoréthylène
Tribologie (technologie)Index. décimale : 668.4 Plastiques, vinyles Résumé : Solid lubricants such as PTFE offer advantages over oils, greases or silicones in conveying systems. Research on low friction and wear was conducted on a lubricant system with POM core and PTFE surface layer. The second part of this article describes the influencing factors, material properties, and processing of such a compound material. Note de contenu : - Fig. 1 : Spherulite formation in filled POM with 20 % PTFE. The crystallizations time was 600 s at a temperature of 152 °C. The images from the shear cell were made with polarized transmitted light
- Fig. 2 : Optical microscopy images in polarized light: following a pure POM (a), a uniform distribution of PTFE (dark areas) is visible in the POM surface layer with contents of 1 % (b), 5 % (c), and 20 % (d) (all: 6 mm panel, 400-fold magnification
- Fig. 3 : Changes in strength, elastic modulus, and rigidity as a function of PTFE content. Determined in a short-term tensile test acc. to DIN EN ISO 527 on injection-molded tension rod samples
- Fig. 4 : Coefficient of friction as a function of surface pressure at a sliding speed of 0.25 m/s. Determined with a pin-on-disk tribometer and a pairing of POM disk with PTFE content and a PE-UHMW pin
- Fig. 5 : Coefficient of friction in the 24 h endurance test of POM with 20 % PTFE, a sliding speed of 0.3 m/s, and a surface pressure of 1 N/mm². Also determined on a pin-on-disk tribometer with the pairing of POM disk with 20 % PTFE and a PE-UHMW
- Fig. 6 : Surface analysis of POM 5% PTFE with a perthometer before (left) and after (right) test on the pin-on-disk tribometer [1]. During running-in, the dark red PTFE particles are exposed and distributed on the surface
- Fig. 7 : Optical microscope image (polarization optics) of the boundary layer between the unfilled POM core material (below) and the slide surface with POM and 20 % PTFE (above). The materials combine almost completelyEn ligne : https://drive.google.com/file/d/1vu3P9kWBr8s21tKEKpP2_ufwJtINY9Kq/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32992
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Code-barres Cote Support Localisation Section Disponibilité 21073 - Périodique Bibliothèque principale Documentaires Disponible Immune to electrical breakdown / René Krämer in KUNSTSTOFFE INTERNATIONAL, Vol. 109, N° 6-7 (06-07/2019)
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Titre : Immune to electrical breakdown : Toray develops PPS with CTI 600 volts or performance level 0 for electrical applications Type de document : texte imprimé Auteurs : René Krämer, Auteur ; Christian Schirmer, Auteur Année de publication : 2019 Article en page(s) : p. 53-55 Langues : Anglais (eng) Catégories : Alliages polymères
Composants électriques et électroniques
Nanotechnologie
Polysulfures de phénylène
Résistance au fluageIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thanks to a patented plastic alloy based on nanotechnology, PPS compounds can be created that are tracking-resistant, even at very high voltages. These compounds prevent the undesired process of carbonization that can lead to an electrical short on the material surface. The PPS is especially suited for high-voltage applications in electric vehicles. Note de contenu : - Frame for electrical components
- Vicious circle of leaking current and carbonization
- Opportunities and limits of using fillers for heat conductors
- Variable properties
- Figure : Due to its very good stiffness and high melting point, electrical and electronic components are often injection overmolded using PPS
- Fig. 1 : At high temperatures the polymer used for insulation can carbonize in certain spots. If a consistent char path is formed, a short can occur on the component
- Fig. 2 : For PPS that contains Nanoalloy, the dispersion of the polymer components is finer than with conventional PPSEn ligne : https://drive.google.com/file/d/1JWm14PyjIsEZDwEpZ-FLtPoDOYfY39wE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32993
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