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Quantum leap in printing / Hans-Tobias Macholdt in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 10-14 Titre : Quantum leap in printing Type de document : texte imprimé Auteurs : Hans-Tobias Macholdt, Auteur Année de publication : 2002 Article en page(s) : p. 10-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Electrophotographie Encre d'imprimerie Encre électronique Pigments Index. décimale : 667.4 Encres Résumé : The two most important processes are ink-jet printing and electrophotographic printing. How electro-photographic printing works, the improvements being explored and the challenges facing pigment manufacturers are the subjects of this article by the author. The term Non-Impact-Printing (NIP) is used for the manufacture of printing products which use no real printing forms (printing plate, printing block, etc.). Usually, in this case, a digitally-generated print image is transferred to a printing material with the aid of an NIP process. Xerography describes the process by which an image is built up electrostatically and subsequently developed through covering with electrostatically charged powder. This is the principle, also known as electrophotographic printing, on which many modern copiers, laser printers or faxes work. Today, these items of equipment are to be found in every office and have thoroughly revolutionised day-to-day office like in the last 15 years. Increasingly, the process is also being employed for textile printing, small print runs of industrial printing or digital print images[1,2,3]. Table 1 gives an estimate of global toner volumes and machine placements[4] for the electrophotographic printing process. The market growth is driven by technology. Most key players like Hewlett-Packard, Canon, Lexmark, and Xerox are active with both toner and ink jet technologies. Note de contenu : - How do printers and copiers work ? - Composition of an electronic ink - Calling for colour - Future pigments to look different - Charge Control Agents - Environmental aspects - The impact of development - FIGURE : 1. Operating principle of a laser printer - Triboelectric spectrum of pigment classes - 3. Countries with chemical laws that enforce registration of each chemical component of a toner or inkjet formulation. This also includes additives that may be part of the pigment composition - TABLES : 1. Estimates of toner volumes and machine placements - 2. Typical composition of pigment based toners - 3. Selected physical properties of two PY 180 pigment types - 4. Chemical classes of charge control agents Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28000 [article]

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One for the price of two / Stephen Monaghan in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 20-21 Titre : One for the price of two Type de document : texte imprimé Auteurs : Stephen Monaghan, Auteur Année de publication : 2002 Article en page(s) : p. 20-21 Langues : Anglais (eng) Catégories : Oxazolidine Polyuréthanes Revêtements bi-composant:Peinture bi-composant Index. décimale : 667.9 Revêtements et enduits Résumé : The author explains how a one component oxazolidine modified polyurethane prepolymer can give two component performance. Note de contenu : - Fig. 1 : The general reaction of a diisocyanate with a diol - Fig. 2 : Reaction of an isocyanate group with water to form an amine and carbon dioxide. The intermediate carbamic acid is highly reactive and readily breaks down to an amine and carbon dioxide gas - Fig. 3. Reaction of an amine group with an isocyanate group to form a urea linkage - Fig. 4. Reaction scheme for an oxazolidine in the presence of water - Fig. 5. Persoz hardness development of Incorez CL760/CL2 and a 2K polyurethane Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28033 [article]

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Taking care in dispersion developments / Pavel Vasko in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 22-23 Titre : Taking care in dispersion developments Type de document : texte imprimé Auteurs : Pavel Vasko, Auteur ; Pavel Holub, Auteur ; Zdenka Kalabova, Auteur Année de publication : 2002 Article en page(s) : p. 22-23 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Emulsifiants Polymérisation en émulsion Réduction des composés organiques volatils Revêtements décoratifs:Peinture décorative Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Index. décimale : 667.9 Revêtements et enduits Résumé : New dispersion developments need to address the need for reasonable care of their community and the environment. The authors explain how this is being carried out. The current development of waterborne dispersions together with cost/performance characteristics are driven by responsible care for the environment and the community. Biocides, APEO's (Alkyl phenol ethoxylates) and VOC's (Volatile Organic Compounds) are environmental and community issues that are currently in focus. The implementation of the Biocidal Product Directive (BPD 98/8/EC) is imminent. APEO's have been eliminated in many applications, in emulsion polymerisation the exchange is not complete but producers are voluntarily eliminating their use. Recent changes in the regulations concerning the emission of the VOC's have led to a growing interest and need for more environmentally friendly coatings. New dispersion developments including novel morphology and self crosslinking chemistry have addressed the above needs and contributed to satisfying the market requirements for new products. Note de contenu : - Preservatives - Biodegradable emulsifiers for emulsion polymerisation - VOC reduction in decorative paints - New waterborne dispersions for VOC compliant architectural coatings - Table : VOC reduction scheme for waterborne paints. (Products based on VOC g/L rady to use including tinters) Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28034 [article]

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Saving on drying time / Johan Nienhuis in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 29-30 Titre : Saving on drying time Type de document : texte imprimé Auteurs : Johan Nienhuis, Auteur ; Mari de Meijer, Auteur Année de publication : 2002 Article en page(s) : p. 29-30 Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs Revêtement -- Séchage:Peinture -- Séchage Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : In the first part of an article on waterborne coatings for the wood industry the authors report on why a chain approach is needed from joinery industry to the building site. Stricter legislation on the use of solvent borne coatings forces the Dutch joinery industry to consider alternative primer systems. A logical choice is to switch to waterborne primers. However, if these coatings are used in the typical DUtch way of building, then problems may arise. The method of construction of houses in The Netherlands starts by putting up window frames and subsequently building brick walls around them. Therefore, during the construction phase, the primed wood is exposed to moisture (rain), cement and damages. Attention must, therefore, be paid to the performance of a waterborne coating in the first months after application. It is known that waterborne coatings improve their performance after a longer drying time, but this may be critical if the film formation process has not been fully completed. Note de contenu : - Evaluation studies - Chain gangs - Legislation and emissions - Better drying facilities - Pigments affect drying Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28039 [article]

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Cleaning up the act / David Vaughan-Lee in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 192, N° 4455 (08/2002)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 192, N° 4455 (08/2002) . - p. 24-26 Titre : Cleaning up the act Type de document : texte imprimé Auteurs : David Vaughan-Lee, Auteur Année de publication : 2002 Article en page(s) : p. 24-26 Langues : Anglais (eng) Catégories : Antimicrobiens Revêtements hygiéniques:Peinture hygiénique Index. décimale : 667.9 Revêtements et enduits Résumé : Hygienic coatings is the new term used to describe the way coatings can protect surfaces from bacteria, fungi and other microfauna. Note de contenu : Figure : The N-halamine can be polymerised with an isocyanate and the polyurethane polymer only becomes an active biocide following application of chlorinated bleach Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28046 [article]

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