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Only that passes that should pass / Florian Kampf in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) . - p. 12-13 Titre : Only that passes that should pass Type de document : texte imprimé Auteurs : Florian Kampf, Auteur Année de publication : 2017 Article en page(s) : p. 12-13 Langues : Multilingue (mul) Catégories : Assemblages collés Filtres à air Joints d'étanchéité Mousses (matériaux) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Whether used in vacuum cleaners, car or air conditioning of industrial plants - the quality of filters plays an important role in many productions and products. So that filters keep their promises, they must be well glued and ensure a perfect seal. Note de contenu : - Potting with self-healing effect - Precise sealing, gluing and potting - Low-emission foam sealings - Antimicrobial foam gaskets Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28061 [article]

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Structural bonding in automotive body shop / Andreas Lutz in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) . - p. 14-20 Titre : Structural bonding in automotive body shop Type de document : texte imprimé Auteurs : Andreas Lutz, Auteur Année de publication : 2017 Article en page(s) : p. 14-20 Langues : Multilingue (mul) Catégories : Adhésifs -- Propriétés mécaniques Adhésifs dans les automobiles Adhésifs structuraux Adhésion Automobiles -- Carrosseries Collage structural Essais de pelage Joints d'étanchéité Résistance au cisaillement Résistance au décollement Rhéologie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The use of multi material mix in the body structure in modern design for passenger cars generates issues with regard to significant temperature differences in joints caused by the different CLTEs of the different substrates when the car body passes the e-coat oven. These temperature gradients result in high tension and part deformation. New structural adhesive technologies must tolerate these thermally induced joint stresses. Note de contenu : - Historical development - Mechanical properties - Application of structural body shop adhesives - Structural adhesives for body repair - TABLES : 1. Typical properties of structural body shop adhesives - 2. Overview of mechanical properties of a structural body repair adhesive - 3. Mechanical properties of an adhesive which was optimized for Galvaneal adhesion compared to a reference adhesive - T-peel strength of adhesion improved adhesives versus non optimized adhesives - 5. Las shear and T-peel strength after VDA corrosion exposure - 6. Rheological data of structural adhesives and their applicability : data are generated at 45°C and following DIN 54458 - 7. Mechanical properties of different structural repair adhesives - FIGURES : 1. Application of a structural adhesive on a car body - 2. Generational development of structural body shop adhesives - 3. Rheological comparison of higher viscous versus a lower viscous adhesive - 4. Aluminum-steel adhesive joint of a vehicle front end - 5. Dynamic impact peel strength in dependence of the test temperature - 6. Quasi statics strength development after humidity storage - 7. Rheological comparison of a wash-off resistant structural adhesive compared to a not improved adhesive following DIN EN 12092 - 8. Lap shear strength after different environmental corrosion cycles (VDA and P1210) - 9. Adhesive bulk stability in dependance of time and temperature - 10. Strength-elongation diagram of mild steel specimen which are bonded using a toughened adhesive compared to specimen which are bonded using a basic adhesive - 11. Strength-elongation diagram of high strength steel specimen which are bonded using a toughened adhesive compared to specimen which are bonded using a basic adhesive - 12. Failure mode after T-peel testing of different adhesive formulations (very good, well and bad adhesion) - 13. Fatigue comparison of an improved structural adhesive versus a reference adhesive : the improved toughened adhesive shows a higher middle load at same amount of cycle loading - 14. Dynamic impact peel strength of different body repair adhesives following ISO 11343 - 15. Elastic moduli of different body shop adhesives Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28062 [article]

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Continuous control of sealing seams / Christian Florin in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) . - p. 28-31 Titre : Continuous control of sealing seams Type de document : texte imprimé Auteurs : Christian Florin, Auteur Année de publication : 2017 Article en page(s) : p. 28-31 Langues : Multilingue (mul) Catégories : Adhésion Contrôle non destructif Imagerie (technique) Joints d'étanchéité Mesure Tomographie Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The main field of application of optical coherence tomography has hitherto been in the medicine. Thanks to their strengths, this non-destructive measurement technology has also been predicted for some time as a major target for the industry. For example, the OCT method could help to ensure the quality of sealed seams in the running production process to 100%. Note de contenu : - Initial position - The task - The measuring process - High resolution - Adhesion - FIGURES : This OCT image shows an inclusion in the sealed seam - 2. The system for sealing seam inspection for laboratory operation and a test cell as an off-line station have proved their value in day-to-day use in industry - 3. Schematic representation of the measuring principle - 4. The particle appears as an additional layer in an otherwise homogeneous seal seam - 5. The arrow on the left picture shows the edge of the welded particle, the arrow on the right picture shows a topography change due to a welded hair - 6. The cover film, consisting of two layers, can be seen on this OCT image. This followed by the adhesive layer and the carrier of the adhesive layer, which partially do not show any connection to the carrier. It is also possible to deduce the depth of the light reflections from the OCT signals - 7. This sketch of a seal seam and associated OCT image show various sealing errors and inclusions on flat and profiled outsides as well as air pockets or leakage points - 8. Sketched sealing zone using the example of a four-layer film - TABLE : All types of faults, which are to be found destructively by the inspected device Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28063 [article]

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Adhesive screening - if there's a need for a firm hold / Annett Hartmann in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) . - p. 32-35 Titre : Adhesive screening - if there's a need for a firm hold Type de document : texte imprimé Auteurs : Annett Hartmann, Auteur ; Stefan Schwedat, Auteur ; Katrin Pawlik, Auteur ; Bernd Grünler, Auteur Année de publication : 2017 Article en page(s) : p. 32-35 Note générale : Bibliogr. Langues : Multilingue (mul) Catégories : Adhésifs -- Analyse Epoxydes Essais (technologie) Mesure Perméation Transmission de vapeur d'humidité Index. décimale : 668.3 Adhésifs et produits semblables Résumé : When the durability of components connected by adhesives depends on the moisture content of the environment, it is advisable to examine the vapour permeability during the product development. Due to a new measuring procedure we are able to analyse cured reaction resin compounds with regard to permeation processes. Note de contenu : - Moisture - Analysis of water vapour transmission - Test method - Suitable preparation of samples - Water vapour transmission of silicone - Water vapour transmission of epoxy resin adhesives - FIGURES : 1. Factors of influence regarding the functionality of adhesive compounds - 2. Sketch of the function of the measuring cell - 3. Certificate of attendance for the proficiency test analysing the water vapour transmission of plastics - 4. Water vapour transmission depending on time Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28064 [article]

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100% inspection of surfaces before gluing / célian Cherrier in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) . - p. 36-39 Titre : 100% inspection of surfaces before gluing Type de document : texte imprimé Auteurs : célian Cherrier, Auteur ; Richard Söhnchen, Auteur Année de publication : 2017 Article en page(s) : p. 36-39 Langues : Multilingue (mul) Catégories : Composites à fibres de carbone Contrôle non destructif Contrôle technique Essais (technologie) Imagerie (technique) Mouillage (chimie des surfaces) Plasma à pression atmosphérique Un plasma à pression atmosphérique (ou plasma à PA ou plasma froid) est le nom donné à une catégorie spéciale de plasma pour lequel la pression approche celle de l’atmosphère. Le plasma à pression atmosphérique marque une nette différence avec le plasma basse et haute pression. En effet, contrairement à ces derniers aucune enceinte de traitement n'est nécessaire. Ce type de plasma peut donc être utilisé directement sur ligne de production, évitant ainsi l'utilisation de vide qui est extrêmement onéreuse. Surfaces -- Analyse Taille des gouttelettes Index. décimale : 668.3 Adhésifs et produits semblables Résumé : There is a new solution on the market for the in-line inspection of the surface condition before gluing. A fine fog is sprayed and evaluated for analysis of the surface energy. This non-destructive test is performed in real time, leaves no residues and covers the entire component. Note de contenu : - Functional principle - Info box : The facts about the wetting test at a glance - Applications - Advantages and benefits - Technical data - Detection of contamination - Characterisation of surface treatments - Application and benefits - FIGURES : 1. Measurement carried out by a robot - 2. Wetting test process chain - 3. Wetting of a CFRP specimen on a conveyor belt. What is known as a water aerosol is produced on the surface with an ultrasound nozzle - 4. Different droplet sizes on a CFRP surface : the area on the right was treated with atmospheric pressure plasma ; here the wettability is much better and therefore the droplets are larger on average - 5. Evaluation of the droplets on a CFRP surface using the Visioncheck image processing software (a zoomed section of the original image is shown on the left, the same area after applying the droplet recognition algorithm is presented in the middle, and the evaluation of each individual drolet is shown on the right) - 6. Sample evaluation and good/bad classification of an area contaminated by a fingerprint, using automated image processing software - 7. Measurement results with evaluation of the average droplet size and wetting percentage : the diagrams on the left show the results of a plasma-activated specimen (activation Lvl1 < activation Lvl2), the diagrams on the right show the results of specimens contaminated by parting agents in various concentrations. These were tested within the scope of the ComBoNDT project (this ComBoNDT project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 636494) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28068 [article]

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Highly filled silicone for sealing headlights in ADHESION - ADHESIVES + SEALANTS, Vol. 14, N° 1/2017 (2017)

[article]  inADHESION - ADHESIVES + SEALANTS > Vol. 14, N° 1/2017 (2017) Titre : Highly filled silicone for sealing headlights Type de document : texte imprimé Année de publication : 2017 Langues : Multilingue (mul) Catégories : Adhésion Alumine Charges (matériaux) Pompes à piston Silicones Les 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). Systèmes de dosage Index. décimale : 668.3 Adhésifs et produits semblables Résumé : To obtain the best bond results not only the selection of the most appropriate adhesive counts. Also the dosing process needs to be secure. Dosing pumps with the endles-piston-principle are proven in many application areas. But what about wear resistance when it comes to LEDs bonding with a highly filled silicone ? Note de contenu : - One material - manyfeatures - RTV silicone filled with aluminium oxide - Simulated dot dispensing - FIGURES : 1. Dispenser range - 2. Repeatability measurement - 3. Measurement of temperature & dosing pressure at the pump outlet - 4. Detailed stator geometry Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28069 [article]

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