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POLYMERS PAINT COLOUR JOURNAL - PPCJ . Vol. 194, N° 4481Opportunities in MoroccoMention de date : 10/2004 Paru le : 15/11/2004 |
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Ajouter le résultat dans votre panierSilica gels advance / David Kent in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)
[article]
Titre : Silica gels advance Type de document : texte imprimé Auteurs : David Kent, Auteur ; Timothy Fletcher, Auteur ; Norbert Wings, Auteur Année de publication : 2004 Article en page(s) : p. 21-24 Langues : Anglais (eng) Catégories : Agent mattant
Anticorrosion
Calcium
Couches minces
Gel de silice
Pigments
Revêtements -- Séchage sous rayonnement:Peinture -- Séchage sous rayonnement
Revêtements en phase aqueuse:Peinture en phase aqueuse
Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Why calcium modified silica gel pigment technology will be turned to more as the preferred non-toxic method of corrosion control and gloss reduction in all types of coatings ?
Synthetic silica gel products are widely used in the coatings industry. The annual consumption specialty silica in Coatings is estimated at 32,700 mt only for Western Europe. A wide range of products to fit the differing application performance requirements of the various coatings segments is available. The Grace portfolio for the industry includes Silica gel products, precipitated and colloidal silica. The focus of this article is on silica gel products addressing future market in needs in matting and in corrosion protection.Note de contenu : - Silica gel technology
- Matting agents
- Coil coatings
- Thin-film coatings
- Radiation-cured coatings
- Waterborne coatingsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27684
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Code-barres Cote Support Localisation Section Disponibilité 000293 - Périodique Bibliothèque principale Documentaires Disponible 000294 - Périodique Bibliothèque principale Documentaires Disponible Hybrid inks benefit printers / John Maitland in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)
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Titre : Hybrid inks benefit printers Type de document : texte imprimé Auteurs : John Maitland, Auteur Année de publication : 2004 Article en page(s) : p. 28-30 Langues : Anglais (eng) Catégories : Brillance (optique)
Encre -- Séchage sous rayonnement ultraviolet
Encre d'imprimerieIndex. décimale : 667.9 Revêtements et enduits Résumé : The new generation of hybrid inks helps the small commercial printer offer faster turn-around as they allow both printing and varnishing to be completed in a single pass.
The new generation of hybrid inks has become available that enables high gloss in-line varnishing to be carried-out immediately following multicolour printing. These inks represent a hybrid between conventional and UV curing that utilise both drying mechanisms. The UV component of the formulation allows the ink to be sufficiently set such that a 100% UV curing over-varnish can be applied immediately.
An optimised process can give very high gloss levels almost approaching that of 100% all UV with the minimal reduction in gloss level or 'gloss-back' on final drying. Hybrid inks offer an entry-level for the smaller commercial printer to add inline varnishing to their operations at relatively low cost and provide their customers with a faster-turn around as both printing and varnishing are completed in a single pass.Note de contenu : - Drying mechanisms
- Commercial reality
- Hybrid inks
- UV customised engineering solutionsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27685
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Code-barres Cote Support Localisation Section Disponibilité 000293 - Périodique Bibliothèque principale Documentaires Disponible 000294 - Périodique Bibliothèque principale Documentaires Disponible Handling the powder problem / Jo Smewing in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)
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Titre : Handling the powder problem Type de document : texte imprimé Auteurs : Jo Smewing, Auteur Année de publication : 2004 Article en page(s) : p. 9-11 Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : This paper looks at powder flow in the paints and coatings industry, the need for accurate testing and its benefits to manufacturers.
It has been estimated that powders account for 50% of materials used in industry. In paints, coatings and adhesives, this proportion is even higher. Handling and processing powders, particulates and granules is central to the paints and coatings industry, but has traditionally been fraught with problems due to their unpredicable and irregular behaviour, specifically with respect to flowability. With so many raw materials, semi-finished and finished products in powder form, this sector stands to gain significant manufacturing and commercial benefits from improvements in the assessment of powder flow. Recent technological developments are now poised to deliver those advantages.
Powder handling and processing tends to be problematic because powders exhibit properties similar to both solids and liquids. Normally, they are surrounded by air and combine in many ways to change the way the powder behaves. Many common manufacturing problems are attributed to incorrect powder flow, including non-uniformity (segregation) in blending, under- or over-dosage, inaccurate filling and obstructions and stoppages. These in turn lead to excessive rejected material, machine down-time and defective end-products. Storage, handling, production, packaging, distribution and end use can all be negatively affected by common powder flow problems.
Knowing a powder's characteristics - and the factors which impact on it - is therefore essential. This allows the optimisation of formulation, equipment and incorporates quality control principles throughout production, thereby assisting in process design, performance evaluation and troubleshooting.Note de contenu : - Accurate flow measurement
- Traditional measurements
- Instrument-based testing
- Controlled flow
- Specialist software
- Technology for flexibilityPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27687
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Code-barres Cote Support Localisation Section Disponibilité 000293 - Périodique Bibliothèque principale Documentaires Disponible 000294 - Périodique Bibliothèque principale Documentaires Disponible Has the coatings industry found a total powder system alternative ? / Andrew Cockcroft in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)
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Titre : Has the coatings industry found a total powder system alternative ? Type de document : texte imprimé Auteurs : Andrew Cockcroft, Auteur Année de publication : 2004 Article en page(s) : p. 12-14 Langues : Anglais (eng) Catégories : Essais accélérés (technologie)
Essais de brouillard salin
Essais de résilience
Poudres
Primaire (revêtement)
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : A new technology zinc powder primer can compete with some of the leading liquid paint zinc primers available today and may offer a total powder system alternative of galvanising under certain conditions. Note de contenu : - Primer differentiation
- The liquid challenge
- TABLES : 1. List of powder zinc primers tested using hot neutral salt spray (ASTAM B117) to 3000 hours and supported with natural exposure testing - 2. Creep figures once coating systems tested have been sprayed with hot neutral salt spray (HNSS) ASTM B117) up to 3000 hours - 3. Powder primer performance is tested using natural exposure over 17 months at the Blyth coast test sitePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27697
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Code-barres Cote Support Localisation Section Disponibilité 000293 - Périodique Bibliothèque principale Documentaires Disponible 000294 - Périodique Bibliothèque principale Documentaires Disponible Blade runner / Reg Freeman in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)
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Titre : Blade runner Type de document : texte imprimé Auteurs : Reg Freeman, Auteur Année de publication : 2004 Article en page(s) : p. 15-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture
Fluidisation
Revêtements poudre:Peinture poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : The French automotive industry has improved the control of powder flow in the fluidisation bed thanks to a new measuring system.
As margins in the automotive industry come under increased pressure, companies are looking to optimise processes and save money in every aspect of their manufacturing. In addition, many car manufacturers see the introduction of innovative technologes as a key strategy in their efforts to stay ahead of the competition.
Finishing and powder coating is a critical process in automotive manufacturing and one where cost optimisation and innovation are key.
To achieve a high-quality finish from a powder coating, complete and accurate information about powder flowability is essential.
A powder coating must be free-flowing and it must fluidise well in the fluidisation bed. This ensures that individual particles are separated, improving the electrostatic charge that can be applied to the powder so that flow more easily through the spray gun to give an even finish. The flowability of a powder is also important in powder recovery - a free-flowing powder will not clump during recovery, reducing the amount of waste.
Automotive powder coatings are a mixture of several components, such as resin, crosslinker, pigments, flow aids and degassing solvent. Their flowability is affected by many factors, most being especially sensitive to moisture adsorption and exposure to heat, for example. The way they are stored can also have a large impact on their subsequent performance in the spray painting booth.
Smooth fluidisation is a key goal, and the ability to achieve this depends on finding the optimal balance of critical parameters such as particle shape, size distribution, flow characteristics, moisture content, air velocity, humidity and ratio of powder depth to the bed floor area.
A powder rheometer can quantify a powder's flowability under a range of conditions and give valuable information about how it will perform in a fluidised bed.Note de contenu : - Fixing the mix
- The complexity of powders
- How does a rheometer work ?
- In practicePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27698
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