| Titre : |
UV and LED technologies for adhesive applications : Adhesives are cured right away using UV/LED technologies, so the parts or converted materials are immediatly ready for the next downstream process |
| Type de document : |
texte imprimé |
| Auteurs : |
Chris Davis, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 30-32 |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs -- Séchage sous rayonnement ultraviolet
Adhésifs thermofusibles
Assemblages collés
Diodes électroluminescentes
Photoréticulation
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
As adhesives become more prevalent and accepted in industry, the more varied the formulations have become—and by corollary, the more diverse the curing mechanisms. One curing method that has gained traction is radiation curing—specifically, using the ultraviolet (UV) spectrum to provide photonic energy that triggers a fast reaction called photopolymerization. In this particular case, the adhesives contain a photo initiator, which, when exposed to UV light, generates a reactive species that starts to create C-C bonds; the higher the percentage of C-C bonds, the better the "cure". |
| Note de contenu : |
- Understanding UV and LED
- Practical examples
- Determining feasibility
- Fig. 1 : The UV spectrum
- Fig. 2 : High-intensity energy can be used to transmit the dose to the adhesive if the adhesive is under a layer of transparent material
- Fig. 3 : In the case of hot-melt UV acrylate adhesives, the dose is monitored with a highly accurate sensor and is linked into the UV system's power setting to create a closed-loop power control |
| En ligne : |
https://www.adhesivesmag.com/articles/97194-uv-and-led-technologies-for-adhesive [...] |
| Format de la ressource électronique : |
Web |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33219 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 26, N° 9 (09/2019) . - p. 30-32
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