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Single or in pairs / Susanne Palm in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 10-13 Titre : Single or in pairs : Conceptual design of turnkey systems for caps production Type de document : texte imprimé Auteurs : Susanne Palm, Auteur Année de publication : 2018 Article en page(s) : p. 10-13 Langues : Anglais (eng) Catégories : Bouchons en matières plastiques Matières plastiques -- Moulage par injection -- Appareils et matériel Technique de la production Index. décimale : 668.4 Plastiques, vinyles Résumé : When it comes to disc top caps for cosmetics bottles or three-part, childproof e-liquid caps, Gramß GmbH Kunststoffverarbeitung specializing in the fast and precise production of packaging articles is in its element. Whether several standard machines linked together or a multi-component machine is the best injection molding solution for a particular case depends on various factors. Note de contenu : - Flexible solution for three product versions - External assembly after a define shrinkage process - Simultaneous injection molding of three different parts with integrated assembly - Rapid amortization thanks to an high output En ligne : https://drive.google.com/file/d/1Sw5SuEsyIsZI-90lc59yurTmbHhORtEu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31081 [article]

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CO2 foaming made easy / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 14-18 Titre : CO2 foaming made easy : Tailor-made blowing agent mixtures in foam sheet extrusion Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Robert Breuer, Auteur ; Philipp Gladbach Année de publication : 2018 Article en page(s) : p. 14-18 Langues : Anglais (eng) Catégories : Agents d'expansion (chimie) Dioxyde de carbone Malaxeurs et mélangeurs Mélanges (chimie) Mousses plastiques -- Extrusion Rhéologie Solubilité Viscosité Index. décimale : 668.4 Plastiques, vinyles Résumé : In industrial practice, CO2 has so far only partially established itself as a blowing agent in foam sheet production because it is poorly soluble in plastics and therefore requires high process pressures. However, co-blowing agents can increase the solubility of carbon dioxide, so that lower pressures and lower temperatures are sufficient for processing. Note de contenu : - IKV foam extrusion pilot line : two injection ports for CO2 (front) and co-blowing agents (back) are used for foaming with blowing agent mixtures - Fig. 1 : Inline rheometer die with inspection window, bypass outlet, pressure transducers and adjustable die gap. Sketched are also emerging gas bubbles - Fig. 2 : IKV foam extrusion line : long single-screw extruder with direct injection of blowing agent, static mixer and annular sheet die - Fig. 3 : Solubility of the blowing agent mixture as a function of the co-blowing agent concentration : solubility increases with increasing proportion of the more soluble co-blowing agent - Fig. 4 : Foaming pressure as a function of the blowing agent concentration : blowing agent mixtures allow lower foaming pressure to be used - Fig. 5 : Viscosity of the gas-loaded melt as a function of the co-blowing agent quantity : the viscosity decreases with increasing blowing agent content and increasing molar co-blowing agent quantity in the polymer melt - Fig. 6 : Nucleation density for a blowing agent mixture of 2.5 wt. % CO2 and 0.5 wt. % ethanol as a function of the reduced die pressure p*: with increasing nucleation density the structure is more fine-celled En ligne : https://drive.google.com/file/d/11R1HM-4MATBowlULjA2FUGOpqnnhiwNH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31082 [article]

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You buy with your eyes / Gudrun Klein in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 19-21 Titre : You buy with your eyes : Attractive packaging with individual product designs Type de document : texte imprimé Auteurs : Gudrun Klein, Auteur Année de publication : 2018 Article en page(s) : p. 19-21 Langues : Anglais (eng) Catégories : Cosmétiques -- Emballages Eco-conception Emballages en matières plastiques Index. décimale : 668.4 Plastiques, vinyles Résumé : Female or male, young or old: many people want to look attractive. This benefits the cosmetics industry, and the market for cosmetics packaging is growing correspondingly. Plastic materials score highly here due to their outstanding freedom of design. - Fig. 1 : The glass flacon of the latest perfume "Goldea The Roman Night" is crowned with a crystal-clear, elliptical closure of Surlyn - Fig. 2 : A new class of pigments give plastics a metallic look with an exceptional luster - Fig. 3 : The spring/summer 2019 trend colors from Color-plasticchemie include both natural shades and shimmering gold or bright red - Fig. 4 : A new digital printing technology permits not only seamless 360° decoration but also personalized tube design and the use of spectacular images - Fig. 5 : With a packaging of cellulose-based bioplastic, manufacturers of natural cosmetics can offer consumers integrated concepts Note de contenu : - Value with the appropriate plastic - Shades, design effects and trends in 2019 - Individual design through digital printing - Eco-efficient from the start En ligne : https://drive.google.com/file/d/1gNUYaAQpN8xKZAKZmGzATujWKwn1JkkL/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31083 [article]

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Load well loaded / Julia Botos in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 22-24 Titre : Load well loaded : Efficient use of material and secure distribution with transport packaging Type de document : texte imprimé Auteurs : Julia Botos, Auteur ; Erich Steiner, Auteur ; Andreas Walsdorf, Auteur Année de publication : 2018 Article en page(s) : p. 22-24 Langues : Anglais (eng) Catégories : Films plastiques étirables Housses Sangles Transport de marchandises Index. décimale : 668.4 Plastiques, vinyles Résumé : Protecting goods during storage and transport is one of the most important tasks of packaging. A new regulation provides for more controls of load units and their transport packaging. For Eckes-Granini, a supplier of fruit juices, a load unit has been developed that requires less material and offers improved stability. Note de contenu : - Materials and systems for transporting - Checking load unit stability - Practical example : load unit for fruit juices - Fig. 1 : development of sufficient load unit stability due to appropriate packaging. 100% then corresponds to the forces occurring on the particular distribution channel - Fig. 2 : Set-up for testing dynamic horizontal loading - Fig. 3 : Comparison of stretch hood and stretch film - Fig. 4 : Slow-motion images of the second horizontal test using a stretch hood. Here the range of permissible deformation is green, individual use for high-bay warehouses is yellow, and invalid deformation is red. In this instance, plastic deformation is 16 cm and lies in the red zone - Fig. 5 : In the third test with stretch film, the 5 cm plastic deformation lies within the green zone En ligne : https://drive.google.com/file/d/1NHQaiUqyir8WFRq7Oxl0FRgGYDf3IdMQ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31084 [article]

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Savings potential in dynamic temperature control / Benno Bucher in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 25-27 Titre : Savings potential in dynamic temperature control : Case study on energy optimization of the variotherm process with an energyBattery Type de document : texte imprimé Auteurs : Benno Bucher, Auteur ; Raffael Palazzolo, Auteur Année de publication : 2018 Article en page(s) : p. 25-27 Langues : Anglais (eng) Catégories : Coût -- Contrôle Matières plastiques -- Moulage par injection Moules d'injection Température -- Contrôle Index. décimale : 668.4 Plastiques, vinyles Résumé : A new temperature-control concept from Regloplas AG reduces the undesirable mixing of cold and hot heat-transfer media by separating them and temporarily storing them cyclically. This makes the energy-intensive variotherm temperature control more efficient and cost effective. Note de contenu : - State of the art overtaker by temporary storage - Theoretical possible energy saving - Measurements in practice - Analytical savings potential of EUR 1530 - Fig. 1 : State-of the art of a dynamically temperature-controlled mold. Cold and hot heat-transfer medium flows cyclically through the mold (T stands for the temperature measurement position) - Fig. 2 : In variotherm temperature control the energyBattery serves for temporary storage of the cold and hot heat-transfer medium - Fig. 3 : The supply temperatures can be significantly improved by variotherm temperature control with the energyBattery. All trials were carried out using a P200M pressurized-water temperature control unit with 60 l/min. flow rate and 18 KW jeating capacity - Fig. 4 : The graph illustrates the average power of the heating temperature control unit that is saved with an intermediate store (energyBattery) - Table : test conditions for the manufacture of high-quality plastic parts. The first three trials were performed using a mold from the IWK En ligne : https://drive.google.com/file/d/11T-2PEkNnsrSMDgLfZgBc54Sr8YnlHFz/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31102 [article]

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The appropriate frame / Reinhard Bauer in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 28-31 Titre : The appropriate frame : Options for overmoldong of car glass windows on vertical machines Type de document : texte imprimé Auteurs : Reinhard Bauer, Auteur Année de publication : 2018 Article en page(s) : p. 28-31 Langues : Anglais (eng) Catégories : Assemblages (technologie) Assemblages multimatériaux Elastomères -- Moulage par injection Elastomères -- Moulage par injection -- Appareils et matériels Matières plastiques dans les automobiles Vitrage Index. décimale : 668.4 Plastiques, vinyles Résumé : The assembly by injection molding is not limited to plastic components among each other, also non-plastic components, such as wood, metal or glass can be assembled with plastic by injection molding to a finished component. The latter is increasingly used for mounting gaskets on automobile windows. The efficiency of this assembly process is largely determined by the efficiency of the glass pane manipulation. LWB Steinl has more than 20 years of experience and presents the options. Note de contenu : - Advantages of vertical machines during insertion processes - Tie-barless C-frame machines for small glass windows - C- and and gantry-frame-special-machines for two glass panes in one production cycle - Ergonomics champion 3-tie-bar-machine - 4-tie-bar-machine for large glass sizes - Fig. 1 : Series machines of the VC series with tie-barless C-frame clamping unit and vertical injection unit (here in thermoplastic design) can be upgraded to efficient production cells with shuttle or turntable modules and light curtain safety zones - Fig. 2 : Vertical, bottom-closing C-frame machine with side-extended 2500 kN clamping unit in combination with turntable unit and horizontal injection unit - Fig. 3 : Vertical, top-closing turnta-ble type VRRS 3000/ SP750 t with two injection units for two tools simultaneously on a 3000 mm turntable. The total clamping area of 2200 x 700 mm (bottom) is at only 850 mm above ground level - Fig. 4 : Detailed view of the 3-tiebar-clamping-unit in combination with the 2-station turntable-module. The new machine concept offers maximum freedom for tool clamping and component handling in the workstation - Fig 5 : The "floating" overhead position of the plasticizing unit above the clamping unit creates the prerequisite for a tool area accessible from all sides - Fig. 6 : Vertical large machine with the type designation VSRS 4500/3000 with 4-tiebar-clamping-unit (4500 kN), closing from above, horizontal injection unit and 2-station shuttle-table-system. The clamping surface of 2000 mm x1000 mm offers the potential for the use of large and therefore heavy tools for large-format automotive glass panes En ligne : https://drive.google.com/file/d/1skwfOF3DpCSsZpxTx9gZSIQByCo0k-Zt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31103 [article]

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Printing the future of particle-foam processing / Johannes Schütz in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 32-35 Titre : Printing the future of particle-foam processing : Lighter, faster, more efficient - Additive manufacturing opens up a new dimension in mold making Type de document : texte imprimé Auteurs : Johannes Schütz, Auteur ; Jonas Beck, Auteur ; Marcus Schmiedeck, Auteur ; Claus Emmelmann, Auteur Année de publication : 2018 Article en page(s) : p. 32-35 Langues : Anglais (eng) Catégories : Economies d'énergie Frittage laser Impression tridimensionnelle Matériaux -- Allègement Moules d'injection Mousses plastiques Index. décimale : 668.4 Plastiques, vinyles Résumé : Three partners cooperating on a research project have developed a new mold concept for particle-foam processing that yields a 95 % weight saving and a substantial reduction in steam consumption. Additive manufacturing creates an optimized mold that does not require a steam chamber and enables complex parts to be made with substantially shorter cycle times and significant energy savings. Note de contenu : - Adding, not subtracting ; stainless steel, not aluminum - Three-layer mold concept - Additive manufacturing integrates additional functions into the mold - Mold weight and energy consumption reduced by more than 90% - Fig. : Due to their functional lightweight design, additively manufactured molds support production of filigree molded parts with intricate surfaces, while simultaneously slashing energy consumption. The handle of a walking stick with inserts (not visible) serves as a demonstrator part here - Fig. 1 : The new mold concept has a sandwich design. From inside to outside: shaping cavity wall, lattice structure, supporting outer wall - Fig. 2 : The SLM process offers new design freedom, such as a combination of a thin cavity wall with a function-optimized lattice structure - Fig. 3 : The thermal dynamics of the optimized stainless steel cavity are far superior to those of today's conventional aluminum molds - Fig. 4 : Additive manufacturing is precise enough for use in particle-foam processing and obviates the need for downstream processing of the cavity - Fig. 5 : Both the steam requirement for process control and the resulting cycle times demonstrate the savings potential of the new mold concept En ligne : https://drive.google.com/file/d/1jMoBW1UNXasZ8kFYQccBEi8L82iDOg0A/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31104 [article]

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From virtual foam cell to finished component / Matthias Wohlmuth in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 36-38 Titre : From virtual foam cell to finished component : Ultrasim software simulates processing of polyurethane systems Type de document : texte imprimé Auteurs : Matthias Wohlmuth, Auteur ; Bruno Schieber, Auteur Année de publication : 2018 Article en page(s) : p. 36-38 Langues : Anglais (eng) Catégories : Mousses plastiques Polyuréthanes Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : The properties of foams are primarily determined by their reactive processing. New simulation methods with wide-ranging material models are designed both to calculate the foaming process and predict the resulting foam properties. Specific examples already show extensive correlations between simulation and practice. Note de contenu : - Simulation of mold filling during the foaming process - Chemical reaction and foam expansion - Derivation of component properties from foaming simulation - From behavior of the foam - Simulation of mold filling behavior in the real component - Fig. : Foaming simulation: injection of a BASF Elastoflex E foam into an open mold and the resulting filling pattern 20 s later. Based on CAD data for the finished component, the foaming simulation (red : areas of high material stress) helps to find the best possible injection path, improve the foaming position or evaluate the venting concept - Fig. 1 : The calculated density distribution of a BASF Elastofoam I foam shows the typical density gradient for integral skin foams over the component cross section. The spatial density distribution is the decisive factor determining local stiffness and hardness in the steering wheel - Fig.2. Representation of the simplified reaction kinetics used to describe polyurethane foaming based - Fig. 3. Local stresses resulting from micromechanical simulation on a foam unit cell. This uses a statistical distribution of gas bubbles for a given density, with the aid of which the elastic modulus of the foam can be predicted - Fig. 4. Filling study to validate the Ultrasim simulation model used for a steering wheel made from an Elastofoam I foam. In the simulation and actual trial, both the flow fronts and tiny air inclusions above the center spoke correlate well and confirm the material models and parameters used En ligne : https://drive.google.com/file/d/1gycBHvUa_g34XAcxyd6C9u23VYwhVDde/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31105 [article]

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Secondary raw materials of the future / Christoph Schultheis in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 39-42 Titre : Secondary raw materials of the future : Recycling halogen-free flame-retardant plastics. Example : polyamide Type de document : texte imprimé Auteurs : Christoph Schultheis, Auteur ; Elke Metzsch-Zilligen, Auteur ; Rudolf Pfaendner Année de publication : 2018 Article en page(s) : p. 39-42 Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Recyclage Halogènes VIIA. Ces éléments chimiques sont : le fluor 9F, le chlore 17Cl, le brome 35Br, l’iode 53I et l’astate 85At. Ces éléments chimiques peuvent se trouver liés à la quasi-totalité des autres éléments chimiques du tableau périodique, y compris quelques gaz nobles pour ce qui concerne le fluor. A 0 °C sous la pression atmosphérique, les corps simples correspondant sont sous forme de molécules diatomiques : à l'état gazeux pour le difluor F2 et le dichlore Cl2, liquide pour le dibrome Br2 et solide pour le diiode I2 et l’astate. Aucun ne se trouve dans la nature sous cette forme. La forme la plus courante, dans la nature est la forme ionique (ions fluorure, chlorure, bromure ou iodure) et, en quantité moins abondante, dans des combinaisons moléculaires, par exemple avec le carbone. C'est le cas des hormones thyroïdiennes iodées par exemple. Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Matières plastiques -- Additifs Matières plastiques -- Recyclage Polyamide 66 Index. décimale : 668.4 Plastiques, vinyles Résumé : At present, flame-retardant plastic parts past their service lifetime are predominantly used energetically. The further development of the circular economy makes it necessary to rethink materials recycling. However, this issue becomes increasingly complex wherever such additives as flame retardants, fibers, or fillers are used. Note de contenu : - Prerequisites for materials recycling - Flame retarded, glass fiber-reinforced polyamide - Materials recycling of flame-retardant polyamides - Properties of the recyclates - Usefulness and conclusion - Fig. 1 : Discoloration of 1.6mm thick test specimens for determining fire behavior (UL94) due to influence from multi-extrusion, test specimen aging, and injection molded test specimens from aged granulate - Fig. 2 : Influence from multi-extrusion on the mechanical characteristics E-modulus and tensile strength - Fig. 3 : Fracture surface of PA66-GF30 HFFR after the first and fifth extrusion steps under a SEM - Fig. 5 : Multi-extrusion : test specimen after passing the fire test with and without addition of flame-retardant - Fig. 6 : Influence from oven aging on mechanical characteristics - Table 1 : Post fire test: Influence from multi-extrusion on the fire behavior of PA66-GF30 HFFR (top) and PA6-GF30 HFFR (bottom). The indicated total number of times (Et1+t2) corresponds to the sum of five tested specimens - Table 2 : Influence from oven aging on fire behavior (UL94). The indicated total number of times (Et1-Ft2) corresponds to the sum of five tested specimens En ligne : https://drive.google.com/file/d/1BNQ0NsPwFXd9V8-04EHBg-GXQoGn2xKn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31106 [article]

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Transparent and safe / Balz Aebli in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 43-44 Titre : Transparent and safe : Material for applications in cell phones, cars, toys, and beverage bottles Type de document : texte imprimé Auteurs : Balz Aebli, Auteur Année de publication : 2018 Article en page(s) : p. 43-44 Langues : Anglais (eng) Catégories : Polyamides Un polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine. Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères. Polymères amorphes Résistance chimique Souplesse (mécanique) Transparence (optique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Grilamid TR 50 is the latest addition to Ems-Grivory’s amorphous polyamide product range. The new material combines properties such as high stiffness, optical quality, and chemical resistance with high ductility and toughness. Note de contenu : - Ductility ensures safety - Fig. : In transparent, colored or opaque piano black formulations, Grilamid TR50 offers high ductility and design freedom - Fig. 1 : Comparison between the flow path lengths of three products in the Grilamid family - Table : Comparison between the properties of different Grilamid materials En ligne : https://drive.google.com/file/d/17BDu58LZ3iSFbv6cptioDPMbwMGe_Pnk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31107 [article]

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Polymer powders in additive manufacturing / Nicole Rapelius in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 8 (08/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 8 (08/2018) . - p. 45-49 Titre : Polymer powders in additive manufacturing : Part 1 : Material-specific influencing factors and assessment of methods Type de document : texte imprimé Auteurs : Nicole Rapelius, Auteur ; Regina Schreiber, Auteur Année de publication : 2018 Article en page(s) : p. 45-49 Langues : Anglais (eng) Catégories : Additifs Analyse thermique Enthalpie Frittage laser Mesure Polyamide 12 Polypropylène Poudres Index. décimale : 668.4 Plastiques, vinyles Résumé : The mechanical properties of additively manufactured components can not only be increased by means of improved processing and plant technology. Particularly with laser sintering, a closer look at the polymer powder used is worthwhile. A comprehensive investigation shows why and how such a specific powder qualification has an effect. Note de contenu : - Comparison of PA12 and PP - Selection and development of methods - Selected polymer powders - Comparison of five selected measurement methods - Fig. :Figures including supporting material: laser sintering of components is a highly promising additive production method. Material qualifications for plastic powder determine the properties of the printed components - Fig. 1 : CAD data of the additively manufactured measuring cup for determining powder flowability using the Hausner ratio; dimensions in millimeters Fig.2. : Microscopy images of selected laser sintering powders: new PA powder, 23°C/50 % RH; aged PA powder, 23°C/50 % RH - PP1 and PP2 are new powders from different producers, both with 23°C/50% - Fig. 3 : Volume distribution of particle sizes using the characteristic D10, D50, and D90 values. In each case10%, 50%, and 90 % of the particles are smaller than the specified diameter - Fig. 4 : Low Hausner ratio values imply less loss of volume during tapping, which indicates the powder to be more flowable - Fig. 5 : Due to the longer molecular chains caused by post-condensation reactions, it is possible to clearly determine aged powder by means of the averaged melt volume flow rate (MVR) - Fig. 6 : The results of gel permeation chromatography (molecular weight distribution) serve to determine new and aged PA12 powder - Fig. 7 : DSC curves of new PA powder, 23 °C/50 96 RH (left) and new polypropylene (PP1) powder, 23 °C/50 96 RH (right) with marked sintering window area. The clearly larger sintering window currently recommends PA - Fig. 8 : Measured enthalpy values for first melting and crystallization - Table 1 : Measuring equipment and testing parameters used for characterizing the polymer powder - Table 2 : En ligne : https://drive.google.com/file/d/1G2pHcl7_HPUrB0MIsZdq7q7BXAQJMdI6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31109 [article]

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