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Towards the functionalized FRP Tube / Udo Engelmann in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 11-14 Titre : Towards the functionalized FRP Tube : A merger of hydroforming and injection molding technologies is driving lightweight design Type de document : texte imprimé Auteurs : Udo Engelmann, Auteur ; Markus Layer, Auteur ; André Albert, Auteur ; Eckhard Reese, Auteur ; Dirk Landgrebe, Auteur ; Lothar Kroll, Auteur ; Wolfgang Nendel, Auteur Année de publication : 2017 Article en page(s) : p. 11-14 Langues : Anglais (eng) Catégories : Automobiles -- Pièces Composites à fibres Composites à fibres -- Hydroformage Matériaux -- Allègement Matières plastiques dans les automobiles Métaux -- Suppression ou remplacement Tubes Index. décimale : 668.4 Plastiques, vinyles Résumé : In the Federal German Excellence Cluster "Merge", new processes for hydroforming-injection molding for processing thermoplastic fiber composites are being researched. With gas as a forming and supporting medium, fiber-reinforced plastic tubes have been processed for the first time. In specific applications, researchers succeeded in reducing the part weight and process costs, and increasing productivity. Note de contenu : - Hybrid high performance parts - Hydroforming/Injection molding of FRP hollow profiles - Optimization of the process chain for use of FRP hollow profiles - FIGURES : 1. Process chains for manufacturing hybrid structures. The merger of metal, plastic and FRP-specific processes pursues the goal of combining the individual manufacturing steps with one another appropriate to the component - 2. Combining hydroforming and injection molding in situ eliminates certain process steps. Forming, primary shaping and assembly take place in one mold - 3. Hybrid parts of complex formed metal hollow profiles and functional injection molded components are used in car models as cockpit crossmembers, front-end carriers and front-end adapters - 4. Examples of a high-qulaity over-molded FRP semi-finished product : 1) adhesive-bonded connection, 2) injection molded functional element, 3) FRP tube - 5. Before injection molding, the FRP tube is heated. Components and mode of operation of the infrared heating oven : 1) infrared radiator, 2) transport clips, 3) FRP tube, 4) stepping motor En ligne : https://drive.google.com/file/d/1lSX9hbggBaB_0bk036Rcv1aTfEKsMmwe/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29673 [article]

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Plastic and metal - an inseparable team / Erwin Bürkle in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 15-19 Titre : Plastic and metal - an inseparable team : Innovative injection molding technologies for hybrid lightweight applications Type de document : texte imprimé Auteurs : Erwin Bürkle, Auteur ; Maik Gude, Auteur ; Michael Krahl, Auteur ; Michael Stegelmann, Auteur Année de publication : 2017 Article en page(s) : p. 15-19 Langues : Anglais (eng) Catégories : Assemblages collés Assemblages multimatériaux Composites -- Moulage par injection Matériaux -- Allègement Matériaux hybrides Index. décimale : 668.4 Plastiques, vinyles Résumé : The imminent paradigm shift in mobility makes it essential that the German automotive industry prepares itself to undergo a transformation, both now and in the future, the like of which has not been seen before. Resource-efficient lightweight system engineering in a multi-material design is a key differentiating feature here. In this connection, novel materials, highly automated, digitized manufacturing processes as well as functional integration for intelligent component structures and vehicle systems will form the basis for creating springboard innovations that will dominate the competition. Note de contenu : - Plastic + Metal= Lightweight design ? - Hybrid structures require special plant technology - Smart mold and automation solutions - Bonding polymer and metal properly - FIGURES : 1. Sheet metal, fiber composite structures and LFT ribs are combined in a single process to yield complex three-dimensional hybrid parts - 2. System complex incl. bolt-on unit from KraussMaffei for manufacturing the battery tunnel of the Leika floorpan - 3. Section of the FDC unit with fiber cutting and feed at the front part of the injection unit - 4. The individual components in CAD and the finished FuPro component - 5. Microtexture on the metal surface (shown in fals colors) to improve the adhesion of a metal-fiber composite - 6. Application of a plasma polymer layer to sheet metal by the "Plasma-SealTight" nozzle - 7. ILK hybrid test specimens for analyzing the strength of the connections between different materials for different types of load En ligne : https://drive.google.com/file/d/1Q60DlKrR1UnVNiJ71gJRL1jg-KHvPqJ-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29674 [article]

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Icons of the modern era / Tamim Sidiki in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 20-23 Titre : Icons of the modern era : Polyphthalamides for hybrid connections in metallic smartphone housings Type de document : texte imprimé Auteurs : Tamim Sidiki, Auteur ; Julie Liong, Auteur ; Michelle Seitz, Auteur ; Li-Dong Zheng, Auteur Année de publication : 2017 Article en page(s) : p. 20-23 Langues : Anglais (eng) Catégories : Acier inoxydable Isolation électrique Matériaux hybrides Nanomoulage Polyphthalamide Smartphones Titane Transition vitreuse Index. décimale : 668.4 Plastiques, vinyles Résumé : Nothing defines the current generation more than the smartphone. Premium, classy metal devices are the current trend. In order for the numerous integrated antennas to work notwithstanding the conductive housings, they must be electrically insulated against each other. Two newly developed polyphthalamides that join especially well with titanium and stainless steel alloys are suited for this purpose. Note de contenu : - Advantages and disadvantages of metal housings - Glass housings - Nano-molding as the joining technology of choice - High-temperature plastic with highest glass transition temperature - FIGURES : The antenna separation in the course of various iPhone generations - 2K. Nano-molding technology (NMT) creates strong connections without adhesives of primers. The process can be divided into three steps - 3. Overview of some application examples where metal-plastic composites were joined to each other in the NMT process. The process is used in aviation and aerospace, automotive engineering, and the electrical and electronics industry - 4. In a comparison of the bonding strength of various plastics on stainless steel after NMT processing, the new materials stand out with high values (Al=aluminum, SUS 304 and SUS 316 = steel alloys) - 5. In addition to the two polyphthalamides that were presented, DSM has other plastics for the NMT process in its portfolio En ligne : https://drive.google.com/file/d/1Pn9RWuZtK6zb2gFDv9D2vU3oi90BsSZN/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29675 [article]

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From versatile to highly efficient in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 24-27 Titre : From versatile to highly efficient : Fakuma 2017 offered a wide range of solutions for flexible automated production Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 24-27 Langues : Anglais (eng) Catégories : Automatisation Industrie 4.0 Le concept d’Industrie 4.0 correspond à une nouvelle façon d’organiser les moyens de production : l’objectif est la mise en place d’usines dites "intelligentes" ("smart factories") capables d’une plus grande adaptabilité dans la production et d’une allocation plus efficace des ressources, ouvrant ainsi la voie à une nouvelle révolution industrielle. Ses bases technologiques sont l'Internet des objets et les systèmes cyber-physiques. Matières plastiques -- Moulage par injection Matières plastiques -- Moulage par injection -- Appareils et matériel Production Robots industriels Index. décimale : 668.4 Plastiques, vinyles Résumé : Anyone looking around Fakuma could discover automation solutions to suit any budget and applications of any complexity. The forerunners of Industry 4.0 were also to be seen. Note de contenu : - Customized mass production - Apps for optimizing the robot cycles and troubleshooting - Efficiency potentials in the human-robot interplay - Automation as standard - IML system for small parts - Small robots control their own vacuum - Tandem robot on one axis - Pressure-tight hybrid component with 57 inserts FIGURES : 1. Industry 4.0 for series production "on demand". A turnkey system produces elastic tension strap to customers' requirements - in different variants from shot to shot - 2. The fine tuning of robot and machine cycles per app coaxes out the last productivity reserves (3. The four-axis robot from Igus is an inexpensive handling solution for many tasks - 4. With IML decoration of coffee capsules, the insertion precision of small labels at high speed is crucial - 5. The Wemo Tandem Concept includes two robots on a linear axis - 6. 57 metal contacts are positioned precisely in the mold before overmolding En ligne : https://drive.google.com/file/d/12CSTHlQFwt1sPeTrhqiq1MdX-s9RVqYk/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29676 [article]

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Collision-free and quickly equipped / Martin Stammhammer in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 28-29 Titre : Collision-free and quickly equipped : Wittmann increases user benefit with digital robot twins Type de document : texte imprimé Auteurs : Martin Stammhammer, Auteur Année de publication : 2017 Article en page(s) : p. 28-29 Langues : Anglais (eng) Catégories : Automatisation Commande numérique Matières plastiques -- Moulage par injection -- Appareils et matériel Productique Robots industriels Index. décimale : 668.4 Plastiques, vinyles Résumé : With the new R9 robot controller, Wittmann demonstrates how the use of the latest hardware and software technologies can increase the efficiency and operational safety. For example, the functionality of a digital robotic twin that is now available as standard enables virtual validation of the processes to be performed by the robot at any time - without any danger to the processing machine or the real handling system. Note de contenu : - Virtual display of real processes - Use on PC shortens unproductive time - FIGURES : 1. On the left a real production cell, on the right the corresponding visualization as a digital twin on the robot control R9. Unproductive processes and safety checks can be postponed to th etime before the production stard - 2. The R9 robot control in 10.1" portrait format, left with the display of the start screen, on the right with the digital twin of a working cell En ligne : https://drive.google.com/file/d/1i04QMLcwf63vIXi1DQDWNlpLehG4tKDi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29677 [article]

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Determining the optimum heating concept for BMC / Vanessa Frekers in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 30-33 Titre : Determining the optimum heating concept for BMC : Simple answers to complex questions in mold design Type de document : texte imprimé Auteurs : Vanessa Frekers, Auteur ; Diogo Alves de Sa, Auteur Année de publication : 2017 Article en page(s) : p. 30-33 Langues : Anglais (eng) Catégories : Chauffage -- Appareils et matériels Matières plastiques -- Moulage par soufflage Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : To be able to cost efficiently design complex molds, e.g. for BMC components, it is essential to take into account the mold cooling. Thus, the mold costs increase in a linear relationship with the number of heating cartridges provided. It is therefore desirable to aim for as few cartridges as possible, but at the same time, this can have a disavantageous effect on the homogeneity of the temperature distribution and the robustness of the process. Until now, these conflicting goals were largely resolved based on experience. But it can also be done systematically. Note de contenu : - Specifying the degrees of freedom and boundary conditions - Reaching the goal with a structured procedure - Step1 : optimum number and position of the heating cartridges - Step2 : Position of the control points - Step3 : Robust process and necessary heating output - FIGURES : 1. Fixed and moving half of a two-cavity mold for headlamp reflectors of BMC - 2. The possible positions for heating cartridges in brown and green for uniform distribution in the mold - in the first step their influence on the evaluation area is determined - 3. The influence ofheating cartridges on the evaluation area falls with increasing distance from the cavity center (positions of the first calculation in green, and the second calculation in orange) - 4. Four heating cartridges are the ideal number within the cavity ; more cartridges do not result in a further temperature increase - 5. With a virtual DoE, all possible positions for heating cartridges are determined with and outside the cavity - 6. Temperature reached in the jacket area around the cavity, depending on the number and spacing of the heating cartridges - 7. With the aid of a thermal simulation of the mold, the possible positions for the three control points are determined - 8. Four heating cartridges each in three control circuits with the associated control points (TC01, TC02 and TC03) - this what the final layout looks like En ligne : https://drive.google.com/file/d/1_A25Yw-yjFKPeSgAyb428DkmsXkJFSmP/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29678 [article]

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The influence of length and curvature / Maiko Ersch in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 34-38 Titre : The influence of length and curvature : Calculation of the long-term behavior of injection molded long-fiber-reinforced thermoplastic components by integrative simulation Type de document : texte imprimé Auteurs : Maiko Ersch, Auteur ; Christian Hopmann, Auteur Année de publication : 2017 Article en page(s) : p. 34-38 Langues : Anglais (eng) Catégories : Calcul Essais dynamiques Flexion trois points Index. décimale : 668.4 Plastiques, vinyles Résumé : Technical components are usually designed to be used for several years. In case of thermoplastic components, the creep and relaxation behavior must also be taken into account over this period of time. This has not yet been solved for injection molded long-fiber-reinforced thermoplastics. In order to be able to simulate the long-term behavior for this material class, the IKV has developed an integrative calculation method. Note de contenu : - The fiber length influences the long-term behavior - Non-linear viscoelastic material model based on pseudo grains - Influence of fiber curvature on long-term behavior - Integrative simulation as the key to success - FIGURES : 1. The internal microstructure can be well described by measuring fiber orientation and fiber length distribution - 2. The fiber length (LFT : long fiber reinforcement : SFT : short fiber reinforcement) has a great influence on the long-term behavior - 3. The effort-oriented calibration procedure enables a good representation of the time-dependent mechanical behavior of the matrix component - 4. The pronounced fiber curvature in LFT components must be taken into account in the material model - 5. If the curvature reduction function is adapted to the processing, the material behavior can reflect reality well - 6. Successful validation of the material model on the model component. For this purpose, a 3-point flexural relaxation test was performed En ligne : https://drive.google.com/file/d/1bL0xWUEg4OmIXeCn32fkOQFsFanAukBy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29679 [article]

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Automated optimization of hollow bodies / Benjamin Twardowski in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 39-43 Titre : Automated optimization of hollow bodies : Application of computer-aided routines in the design of hollow bodies manufactured in the extrusion blow molding process Type de document : texte imprimé Auteurs : Benjamin Twardowski, Auteur ; Sarah Schäfer, Auteur ; Christian Hopmann, Auteur Année de publication : 2017 Article en page(s) : p. 39-43 Langues : Anglais (eng) Catégories : Bouteilles en matières plastiques Matières plastiques -- Moulage par extrusion-soufflage Simulation par ordinateur Index. décimale : 668.4 Plastiques, vinyles Résumé : Improving the mechanical properties of hollow bodies using structural elements is not yet state-of-the-art in the blow molding industry. At the institute for plastics processing (IKV) at the RWTH Aachen University, an approach was developed for the computer-aided design of blow molded articles with stiffening structures. Note de contenu : - Empirical investigations of hollow bodies with corrugation structures - Applied simulation routine - Result of the optimization routine - FIGURES : 1. Blow molding line and mold for the production of test specimens - 2. Wall thickness distribution of a bottle with beads and a bottle without beads in the same process point - 3. Wall thickness distribution along the beads - 4. Input data of the process simulation in B-SIM - 5. Comparison of the simulated and measured wall thickness distribution of the bottles with and without corrugation structures - 6. Comparison of topload simulation and experimental investigations with and without corrugation structures - 7. Comparison of measured topload and topload simulation with adjusted wall thickness distribution according to the measurements - 8. Deterministic optimization : radius, number and distortion are normalized by the maximum values - 9. Comparison of the bottle without corrugation structures and the deterministically optimized bottle - 10K Stochastic optimization En ligne : https://drive.google.com/file/d/16KsdYxyOQT41U3kCiWFkAvZEfw-yaU1S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29681 [article]

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A welding challenge / Thomas Fischer in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 44-45 Titre : A welding challenge : High tightness for plastics that strongly dampen ultrasound Type de document : texte imprimé Auteurs : Thomas Fischer, Auteur ; Johannes Greb, Auteur ; Astrid Herrmann, Auteur Année de publication : 2017 Article en page(s) : p. 44-45 Langues : Anglais (eng) Catégories : Assemblages (technologie) Etanchéité Matériel médical Matières plastiques -- Soudage Polyéthylène basse densité Polyéthylène haute densité Soudage par ultrasons Soudures Index. décimale : 668.4 Plastiques, vinyles Résumé : If several unfavorable conditions come together, the demands on joining technology grow, especially for medical technology products. Not only do they have to be leak-proof, but also satisfy requirements for validated and traceable welding processes. Note de contenu : - Weld force profiling and graphical representation of the parameters - The ultrasonicc generator - Tracking software for traceability - FIGURES : 1. Secretion bottle with cap : welding the materials used (HDPE and LDPE) ightly proved a challenge - 2. Circumferential weld seam : a round blue cap is welded onto a transparent secretion bottle - 3. Product line : a vertically adjustable fixture was required to compensate different heights - 4. HiQ Dialog 6200 : The ultrasonic welding machine has a vertically adjustable tool holder and can display the weld course graphically on its 15-inch screen - 5. The courses of the parameters joining distance (RPN), power (P), and force (F), as well as the correct selection of amplitude (here : 45.9 µm) and requency (here : 20,268 Hz) are the keys to successful process settings En ligne : https://drive.google.com/file/d/1o-eSKaFCfnFrE8-DdETlOdznf06R_9jO/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29682 [article]

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Brilliantly Inspected / Jan Poppensieker in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 46-48 Titre : Brilliantly Inspected : COP methods adds examination of functional properties to film inspection Type de document : texte imprimé Auteurs : Jan Poppensieker, Auteur Année de publication : 2017 Article en page(s) : p. 46-48 Langues : Anglais (eng) Catégories : Brillance (optique) -- Mesure Films plastiques -- Propriétés optiques Matériel optique Mesures optiques Qualité -- Contrôle Transparence (optique) Index. décimale : 668.4 Plastiques, vinyles Résumé : The gloss and haze of films can provide information about numerous functional material properties. With the control of optical properties method, they can be examined during production so that manufacturers are able to produce products of much higher quality and access new markets. Note de contenu : - Monitoring material properties - Inspection with COP - Evaluation of the angle-resolved lighting intensity - Analyzing large data volumes - Higher quality through optical inspection - FIGURES : 1. Camera-based optical inspection systems to assess the quality of plastic sheets - 2. Control of optical properties : in the measurement of reference samples, the inspection method returns measurements that are nearly identical to those of a standards-compliant laboratory device - 3. Measuring optical properties : a line scan camera is able to record the scattered light with angle resolution and therefore capture haze and gloss simultaneously - 4. The see-through quality of film depends on the shape of the scatter curve, and for example influences the appearance of packaged goods in the supermarket En ligne : https://drive.google.com/file/d/1R5uIw7ZU-aGNHZE1CK2t8cmkM0Ugce4Z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29683 [article]

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Long-chained and high-viscous / Benjamino R. Formisano in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 49-52 Titre : Long-chained and high-viscous : High-viscosity recyclates from cast polyamide 6 Type de document : texte imprimé Auteurs : Benjamino R. Formisano, Auteur ; Christian Bonten, Auteur Année de publication : 2017 Article en page(s) : p. 49-52 Langues : Anglais (eng) Catégories : Acides carboxyliques Composés organiques -- Synthèse Elasticité Matières plastiques -- Propriétés mécaniques Matières plastiques -- Recyclage Polyamide 6 Polymères -- Recyclage Polymérisation Produits et matériaux recyclés -- Analyse Viscosité Index. décimale : 668.4 Plastiques, vinyles Résumé : In cast polyamides, the catalyst is retained and remains active, causing the material to degrade during processing in the molten state. To preserve the high-value properties of the material after recycling, specific additives are required. Trials show that it is possible to produce high-viscosity polyamides that can find future use in, for example, thermoforming. Note de contenu : - Characteristics of cast polyamide - Recycling cast polyamide scrap - Properties of the recyclate - FIGURES : 1. Synthesis routes for hydrolytic and anionic polymerization of polyamide 6 - 2. Gearwheels and pulleys are typical applications for cast polyamide - 3. The viscosities of cast polyamide recyclates with polyester-modified wax (G) and carboxylic acid (C) at 270°C - 4. The intersection of the storage and loss modulus curves of a thermoplastic permits analysis of its average molecular weight. Just small quantities of carboxylic acid achieve a molecular weight similar to the original weight, while larger amounts of was produce even higher average molecular weights - 5. The elastic modulus of the high-viscosity cast polyamide recyclates, remains virtually the same, despite different additives - 6. The tensile strength values of the cast polyamides, are not influenced by the additives - 7. In their effect on the notched impact strength values of the cast polyamide recyclates, wax and carboxylic acid show different trends En ligne : https://drive.google.com/file/d/1aPQzHNYm9rVBVv-fCCz5qeUnYcTOz2RW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29684 [article]

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Flame retardant with molecular anchor / Inken Beulich in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 12 (12/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 53-56 Titre : Flame retardant with molecular anchor : Sustainable alternative for forbidden HBCD in polystyrene insulating materials Type de document : texte imprimé Auteurs : Inken Beulich, Auteur ; Christine Lukas, Auteur Année de publication : 2017 Article en page(s) : p. 53-56 Langues : Anglais (eng) Catégories : Construction -- Matériaux Copolymère styrène butadiène styrène bromé Ignifugeants -- Suppression ou remplacement Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Mousses plastiques Polystyrène Index. décimale : 668.4 Plastiques, vinyles Résumé : Since August 2015, the flame retardant hexabromocyclododecane (HBCD) may not be used for insulating materials. After many years of research and development, an adequate substitute has been developed, which is suitable for extruded as well as expanded polystyrene foams. It is neither toxic nor bioaccumulative according to the European REACH regulation and the Stockholm Convention's worldwide POP (persistent organic pollutant) list. Note de contenu : - Balancing Act between regulations, environment, and fire protection - Licensed protection of the flame retardant - Comprehensive environmental testing - FIGURES : The chemical structure of the polymeric flame retardant is a brominated styrene-butaniene-styrene block copolymer with a molecular weight of more than 60 000 g/mol and a 1.2 isomer fraction of >50%. The higher molecular weight reduces the risk of migration through cell membranes - 2. Compared with the new development, the previously used and no longer permitted hexabromocyclododecane (HBCD) has considerably lower molecular weight of 642g/mol - 3. The new sustainable flame retardant, shown here in pure form as a flm, is itself a plastic or polymer with thermoplastic properties - TABLE : Except from the EPA risk report on HBCD substitute materials and their health and environment-related properties En ligne : https://drive.google.com/file/d/10re5Pr5Uz4YUerdtxBhVYjLSqvTa2gbM/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29693 [article]

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19448	-	Périodique	Bibliothèque principale	Documentaires	Disponible