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Antistatic coatings / Frank Ott in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4505 (10/2006)
[article]
Titre : Antistatic coatings Type de document : texte imprimé Auteurs : Frank Ott, Auteur ; Jürgen Patzlaff, Auteur ; Reinhold Rüger, Auteur Année de publication : 2006 Article en page(s) : p. 28-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antistatiques
Pigments
Revêtements de sols:Peinture de solsIndex. décimale : 667.2 Colorants et pigments Résumé : The authors discuss the development of transparent or light coloured conductive materials. Almost everybody has his personal experience with electrostatic charging, for example, walking on parquet, laminate or plastic floor and feeling an electric shock touching the door handle or the handrail. What is merely unpleasant and sometimes painful can create severe damage for electronic devices. Uncontrolled electric discharging is a high rick in manufacturing, packaging and transportation of sensitive electronic parts. Electric flashover is also known to be a severe hazard in areas where flammable, chemicals, solvents, gases or dusts are handled. Therefore, control of electrostatic charging is a must for fire and explosion protection in laboratories, manufacturing areas and transportation vehicles. Common polymer binders used in coatings are insulators and electrostatic charging of coated surfaces is out of control, in particular under dry conditions. For the above-mentioned reasons, there is an increasing demand to provide coatings and plastics with conductive and antistatic properties. For a long time, formulators have used various additives to implement some conductivity into coatings. So far, materials in use for such purposes have significant limitations. Well known and long established in conductive coatings is carbon black but its significant limitation is its deep black colour not allowing the formulation of light coloured coatings. In general, black or dark coloured floorings, for example, are not widely accepted for aesthetic or practical reasons. This is especially an issue in clean rooms and hospitals. Metal powders, such as silver powder, silver flakes or, alternatively, silver coated glass beads or mica are used in the electronic industry but have found only niche applications in coatings for cost reasons. Salt-like additives on the other hand are colourless but require a certain degree of humidity to a coating antistatic. Furthermore, their function is not permanent and conductivity is unstable with air humidity and diminishes over time. In order to provide designers and formulators with the opportunity to combine conductivity and light colours suitable conductive pigments are required. Note de contenu : - Conducting metal oxides
- Minatec conductive pigments
- Pigment composition
- Mode of action
- Advantages
- ApplicationsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27503
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4505 (10/2006) . - p. 28-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005725 - Périodique Bibliothèque principale Documentaires Disponible Cool blue bottles / Steve Bell in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4505 (10/2006)
[article]
Titre : Cool blue bottles Type de document : texte imprimé Auteurs : Steve Bell, Auteur Année de publication : 2006 Article en page(s) : p. 32-34 Langues : Anglais (eng) Catégories : Bleu outremer Le bleu outremer ou outremer est un bleu profond, longtemps extrait de la pierre fine de lapis-lazuli puis fabriqué synthétiquement à partir du XIXe siècle. La base est un thiosulfate d'aluminosilicate de sodium.
Bouteilles en matières plastiques
Matières plastiques -- Coloration
PigmentsIndex. décimale : 667.2 Colorants et pigments Résumé : Holiday Pigments has developed an ultramarine blue to satisfy plastic bottle processing requirements.
One of the most ancient and revered of pigments, ultramarine blue has a distinctive and irreproducible colour. Already used extensively in food packaging, new grades have been developed to meet the tough demands of new plastics moulding techniques including, mineral water bottles, passing strict organoleptic tasting tests.
The Ancient Greeks regarded blue as the ultimate colour of perfect peace and purity, sacred to them as the blue of calm seas in mid-summer - halcyon days. They revered the kingfisher ; the brillant flash of blue from the European kingfisher's wing reminds us of this and the genus of kingfishers is also named Halcyon.
The rare mineral lapis lazuli was the original ingredient for this blue heritage and created the colour adored by artists from Egyptian pharaohs, through classical antiquity and the Renaissance to the present day. Until the 19th century, the only process to extract the pigment was expensive and complicated. In 1828, the first economically viable, synthetic version of ultramarine blue to reproducce lapis lazuli was discovered by Jean-Baptiste Guimet and started the modern industrial process.Note de contenu : - Development of principles
- Environmental purity
- New standards, new grades
- Mineral water bottle caps
- Development and evaluation
- Organoleptic assessmentPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27514
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4505 (10/2006) . - p. 32-34[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005725 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Process control Type de document : texte imprimé Auteurs : Dan Cundill, Auteur Année de publication : 2006 Article en page(s) : p. 39-41 Langues : Anglais (eng) Catégories : Procédés de fabrication
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Powder coating, widely used in industry since the early seventies, is now a mature process, yet still an industry that suffers from immaturity.
Initially powder coating was seen as low quality process which was only suitable for a small number of colours. The number of these colours was very limited and colour changes on the production line were infrequent. In those days so called cartridge modules were very popular because they offered 100% powder recovery. Many things have changed since then. The number of colours sprayed has increased dramatically, colour changes are frequent and film thickness needs to be monitored and controlled to keep costs low. In addition cartridge modules have often been replaced by cyclone recovery systems, which are by nature not 100% efficient. All these factors reveal that system operating efficiency has become the determining factor for investments.
Nordson, a leading supplier of surface finishing aquipment, has taken the approach that the lastest generation equipment needs to move the industry forward from it current point, by achieving process control over the powder plant for the first time.Note de contenu : - Process control
- Powder transport
- Precision dispensing
- Powder circulation
- Process improvementPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27515
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 196, N° 4505 (10/2006) . - p. 39-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005725 - Périodique Bibliothèque principale Documentaires Disponible Going with the flow / Reg Freeman in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 196, N° 4505 (10/2006)
[article]
Titre : Going with the flow Type de document : texte imprimé Auteurs : Reg Freeman, Auteur ; James Cooke, Auteur Année de publication : 2006 Article en page(s) : p. 42-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Revêtement poudre -- Additifs:Peinture poudre -- Additifs
Revêtements poudre:Peinture poudre
RhéométrieIndex. décimale : 667.9 Revêtements et enduits Résumé : This article examines the demands of measuring flow properties of powder coatings.
Careful manipulation of the flow properties of powder coatings is essential for optimisation of the application process. Formulators therefore need access to data that accurately reflect the behaviour of a powder during application. The highly differentiating nature of powder rheometers makes them ideally suited for characterising aerated samples, which are of particular relevance to this application. Their use enables formulators to develop products that meet targets both for coating quality and the ease of application. Further down the line, they have a growing role in QC to verify that these acceptable flow properties are being maintained.Note de contenu : - FORMULATING POWDER COATINGS
- APPLICATION METHODS
- MEASURING FLOW PROPERTIES WITH A POWDER RHEOMETER : The impact of aeration on flow - Optimising flow additive level
- FIGURES : 1. Flow energy as a function of air velocity - 2. Specific energyfor two materials as a function of % flow additive content - 3. Torque energy versus test cyclesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27516
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