Beat the heat / N. Julian K. Danvers in ADHESIVES AGE, Vol. 44, N° 12 (12/2001)  

[article]  inADHESIVES AGE > Vol. 44, N° 12 (12/2001) . - p. 32-37 et p. 48 Titre : Beat the heat : New challenges for curing material on heat-sensitive substrates Type de document : texte imprimé Auteurs : N. Julian K. Danvers, Auteur Année de publication : 2001 Article en page(s) : p. 32-37 et p. 48 Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement ultraviolet Adhésifs thermofusibles Electrodes Micro-ondes Réflectivité thermique Systèmes de refroidissement Index. décimale : 668.3 Adhésifs et produits semblables Résumé : With the advances being made in material science and technology, there is an increase in the amount of polymeric materials used within today's manufacturing environment. The growth of UV curing for its process, performance and environmental factors is presenting new challenges on how to best cure material on thermally sensitive substrates. This article will look at the technology and processes that can be used when the inherent heat generated as part of the UV-source is detrimental to the substrate. It will investigate different types of UV curing systems that can be used for paying special attention to the heat transmission properties associated with them as well as looking at some sample applications in which they can be used. For the benefit of this article, discussions will be based around electrode (arc) and microwave UV equipment. While EB (electron beam) and pulsed UV are both alternative radiation-curing technologies, these will be not covered. Note de contenu : - Technology comparison basis of UV generation - Electrode systems - Microwave systems - Bulb types - Reflector technologies - Reflector geometry - Focus, UV intensity and aspect ratio - Cooling systems - Operational differences - Starting - Maintenance and operating costs - Sensitive substrates En ligne : https://drive.google.com/file/d/1Fcun4krwfzQlSZBQYJv9US-EL7umQMKv/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19958 [article]

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Beat the heat / N. Julian K. Danvers in ADHESIVES AGE, Vol. 45, N° 3 (03/2002)  

[article]  inADHESIVES AGE > Vol. 45, N° 3 (03/2002) . - p. s4-s7 Titre : Beat the heat : New challenges for curing material on heat-sensitive substrates Type de document : texte imprimé Auteurs : N. Julian K. Danvers, Auteur Année de publication : 2002 Article en page(s) : p. s4-s7 Langues : Américain (ame) Catégories : Adhésifs -- Séchage sous rayonnement électronique Adhésifs -- Séchage sous rayonnement ultraviolet Coût de production Entretien et réparations Micro-ondes Réticulation (polymérisation) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : While the lamp head in itself is the primary generator for the heat, this article has tried to demonstrate the factors and technology available in this area to deal with this issue. The exact system used depends on the type and scale of application. Microwave technology has particular advantage in powder, fiber optic, hard coat and plastic component applications. A water-filtered lamp here is better suited to webstyle processes. There is a significant overlap between the suitability of UV sources for different applications. Some of the processes involved can be complex. For example, when curing a coating onto pine, heat is a major issue due to sap rising from the wood and damaging the coating. A recent case has seen electrode technology removed in favor of the lower heat and high intensities associated with microwave. With a three-dimensional object, the short length on a microwave system becomes a major advantage when trying to cover the whole surface with an even UV dose. Automotive headlights generally use a three-lamp arrangement to achieve this result. When dealing with large sheets or webs, a water-cooled or filtered system becomes more advantageous due to the continuous span. For example, the printing of a bank note onto either paper or plastic will use this style technology. The choice of lamp head is a complex issue and the factors affecting the design chosen are not straightforward as it is in a trade-off situation. What I have aimed to do is highlight the area that needs to be considered to enable the reader to better judge the situation. Note de contenu : - Reflector Technologies - Focus, UV Intensity & Aspect Ratio - Operational Differences - Maintenance & Operating Costs En ligne : https://drive.google.com/file/d/1RXonadhnfSTnMruk10x7emcXrqshSXP3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19992 [article]

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