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COATINGS TECH . Vol. 18, N° 6New advances in powder coating technologyMention de date : 06/2021 Paru le : 15/06/2021 |
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Ajouter le résultat dans votre panierAchieving class a appearance on fiber-reinforced substrates / Donald H. Campbell in COATINGS TECH, Vol. 18, N° 6 (06/2021)
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Titre : Achieving class a appearance on fiber-reinforced substrates : Achieving Class A appearance over fiber-reinforced substrates can be challenging. Learn about solutions and the evolving measurements used to characterize topcoated surface appearance Type de document : texte imprimé Auteurs : Donald H. Campbell, Auteur ; G. Singh, Auteur ; Cindy Peters, Auteur ; Jacob Dumbleton, Auteur Année de publication : 2021 Article en page(s) : p. 32-40 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Composites à fibres de carbone
Eléments finis, Méthode des
PolyamidesUn 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.
Revêtements -- Finition:Peinture -- Finition
Surfaces (Physique)
Surfaces courbes
TopographieIndex. décimale : 667.9 Revêtements et enduits Résumé : Achieving Class A appearance over fiber-reinforced substrates can be challenging. We discuss the evolving measurements used to characterize topcoated surface appearance. The influence of carbon fiber on the surface appearance of a thermoplastic resin-transfer-molding (RTM) substrate is related to differences in thermal expansion within the substrate.
The mechanism identified here is then extended to several chopped-fiber-filled thermoplastic substrates where the fiber-mapping effect is manifested in a different manner. We then investigate the influence of thick-film applications to the Class A surface on appearance. Our analysis finds that both the depth and the width or wavelength of the substrate affect the ability of the thick films to cover fiber mapping.Note de contenu : - Class a appearance defined and measured
- Mechanism of fiber influence on appearance
- Potential solutions
- Ongoing projects in this area
- Fig. 1 : Constituent Wave Packets from BYK-Gardner Wavescan
- Fig. 2 : Cross section of RTM substrate
- Fig. 3 : Topography of topcoated RTM substrate at 25°C adn 90°C
- Fig. 4 : Topography of uncoated RTM substrate at 25°C and 90°C
- Fig. 5 : RTM plaque : resin-only area CTE
- Fig. 6 : Effect of fiber on topcoated appearance at bake and room temperatures
- Fig. 7a and 7b : Effect of fiber on substrate surface at bake and room temperatures
- Fig. 8 : Wavescan values for varied primer thicknesses
- Fig. 10 : Relationship of primer thickness to defect wavelength ratio to defect coverage
- Fig. 11 : Finite Element Analysis of defect propagation through primer
- Fig. 12a and 12b : Appearance values for topcoat processes on carbon-fiber-filled polyamide and propylene
- Table 1 : Changes of topography with temperature
- Table 2 : Finite Element Analysis of varied primer thickness, wavelength, and poisson's ratioEn ligne : https://drive.google.com/file/d/16c5zuNUS2yU5gQUhSR_1URCxd_BXHbzq/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35988
in COATINGS TECH > Vol. 18, N° 6 (06/2021) . - p. 32-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22817 - Périodique Bibliothèque principale Documentaires Disponible 22818 - Périodique Bibliothèque principale Documentaires Disponible New advances in powder coating technology / Kevin M. Biller in COATINGS TECH, Vol. 18, N° 6 (06/2021)
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Titre : New advances in powder coating technology Type de document : texte imprimé Auteurs : Kevin M. Biller, Auteur Année de publication : 2021 Article en page(s) : p. 18-23 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Basses températures
Durée de vie (Ingénierie)
Logiciels
Polyesters
Poudres métalliques
Recherche industrielle
Réticulants
Réticulation (polymérisation)
Revêtements organiques
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Advances in low-temperature cure were introduced recently as well as powders capable of meeting high durability standards such as American Architectural Manufacturers Association (AAMA) 2605 and Qualicoat Class 3 (both require 10 years Florida durability).
To meet these specifications the coating must pass the following tests: dry adhesion, wet adhesion, boiling water adhesion, impact resistance, abrasion resistance, muriatic acid resistance, mortar resistance, nitric acid resistance, detergent resistance, window cleaner resistance, 4000 h humidity resistance, 4000 h salt spray resistance and 10 years South Florida durability with a maximum ΔE color change of 5.0 units and 50% gloss retention.
These architectural specifications represent the most demanding coating requirements for commercial buildings such as skyscrapers and stadiums. In addition, sustainable technologies are emerging based on either recycled plastic feedstocks or biobased raw materials. Moreover, binders exhibiting enhanced corrosion resistance and edge coverage have been recently debuted. Corresponding new developments have occurred in testing and application technology.Note de contenu : - Sustainability
- Biobased and recycled
- Low-temperature cure
- Hyper-durability
- Other technology trends in powder coatings
- Shift in polyester curing agent technology
- Antimicrobial coatings
- Bonded metallic powder
- Instrumentation and testing
- Application equipment softwareEn ligne : https://drive.google.com/file/d/1vtNPscsS-u5M_h8fBcA5mJf_ZkJ-57hQ/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35989
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Code-barres Cote Support Localisation Section Disponibilité 22817 - Périodique Bibliothèque principale Documentaires Disponible 22818 - Périodique Bibliothèque principale Documentaires Disponible