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ADHESIVES & SEALANTS INDUSTRY (ASI) . Vol. 18, N° 7High-tech adhesives : Dispensing advances - Composite applicationsMention de date : 07-2011 Paru le : 13/07/2011 |
Dépouillements
Ajouter le résultat dans votre panierBenefits of recirculation / Tom Muccino in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 7 (07-2011)
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Titre : Benefits of recirculation Type de document : texte imprimé Auteurs : Tom Muccino, Auteur Année de publication : 2011 Article en page(s) : p. 23-24 Langues : Américain (ame) Catégories : Adhésifs -- Appareils et matériel
Colles bi-composante:Adhésifs bi-composant
Epoxydes
Matériaux -- Application-dosage
PolyuréthanesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Two-component epoxies and polyurethanes are used in a variety of industries and applications. In the construction industry, for example, epoxies are used to anchor rebar and threaded rod, as well as for structural concrete repair and crack injection, while polyurethane foams are frequently used for insulation and soundproofing. In the automotive industry, polyurethanes are used to assemble filters, exterior lighting, motor covers, tail lamp lenses and other components.
Regardless of the application, a proper mix of materials is critical to the success of any two-component dispensing process. In most instances, as long as the pumping system is capable of delivering both components to the valve in the correct ratio at the desired flow rate, and an appropriate static mixing nozzle is used, the materials will be thoroughly mixed.
A common system configuration for large-scale, two-component dispensing applications consists of separate reservoirs for the base and catalyst, a pump, a meter/mix valve, and a mixing nozzle. Gear pumps or piston pumps are typically used to transport the two components from the base and catalyst reservoirs to the corresponding inlets on the meter/mix valve. When the valve is actuated, the base material and catalyst are pushed through the manifold of the valve, out to the static mixing nozzle and onto the substrate.Note de contenu : - Incorporated fillers
- Recirculating valves
- Additional considerationsEn ligne : http://www.adhesivesmag.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_1000000 [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11936
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Code-barres Cote Support Localisation Section Disponibilité 013177 - Périodique Bibliothèque principale Documentaires Disponible Driving dispensing systems / David Mandeville in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 7 (07-2011)
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Titre : Driving dispensing systems : Servo motors improve adhesive and sealant application quality and product assembly flexibility Type de document : texte imprimé Auteurs : David Mandeville, Auteur Année de publication : 2011 Article en page(s) : p. 25-27 Langues : Américain (ame) Catégories : Adhésifs -- Appareils et matériel
Matériaux -- Application-dosage
ServomécanismesIndex. décimale : 668.3 Adhésifs et produits semblables Résumé : Adhesive dispensing systems can be difficult to specify when buying new machines and hard to understand when trying to improve existing performance. Two items critical to dispensing performance and resulting product quality are the metering principle and motor drive selection. The metering principle defines the adhesive delivery process, while the motor drive determines the fluid control method for adhesive delivery. This article explains the purpose of servo motor drives used in dispensing adhesives and sealants. En ligne : http://www.adhesivesmag.com/Articles/Assembly/BNP_GUID_9-5-2006_A_10000000000001 [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11937
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Code-barres Cote Support Localisation Section Disponibilité 013177 - Périodique Bibliothèque principale Documentaires Disponible Dispensing for Large-Scale Composites / Mac Larsen in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 7 (07-2011)
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Titre : Dispensing for Large-Scale Composites : Advancements in novel pumping technology for paste adhesives are successfully addressing the challenges of large scale composite industrialization Type de document : texte imprimé Auteurs : Mac Larsen, Auteur Année de publication : 2011 Article en page(s) : p. 30-33 Langues : Américain (ame) Catégories : Adhésifs -- Appareils et matériel
Adhésifs -- Applications industrielles
Assemblages collés
Composites -- Collage
Coques (architecture navale)
Eoliennes
Mélanges (chimie)Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The joining together of large structures such as wind turbine blades or ship hulls strictly with adhesives (vs. mechanical fastening techniques) has become a common practice. The current challenge is how to bring the adhesive bonding process into a mainstream operation that increases production throughput while maintaining control and minimizing manufacturing costs.
Many factors need to be addressed when scaling up the bonding process, not the least of which is the question of how to reliably dispense thousands of pounds of adhesive each day, with minimal waste. Advancements in novel pumping technology for paste adhesives are successfully addressing the challenges of large-scale industrialization by quickly and reliably meter-mixing significant volumes of reactive two-component adhesives. The reactive mix is then directly dispensed to bond lines hundreds of meters long or manually pumped into buckets for manual application.Note de contenu : - Properties of paste adhesives
- Mix ratio
- A/B mix quality
- Flow rate
- Bulk supply
- Mobility
- Ease of use and maintenance
- Increasing industrializationEn ligne : http://www.adhesivesmag.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_1000000 [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11938
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Code-barres Cote Support Localisation Section Disponibilité 013177 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Getting stronger : A rice university lab has created a self-strengthening nanocomposite material Type de document : texte imprimé Année de publication : 2011 Article en page(s) : p. 34-35 Langues : Américain (ame) Catégories : Matériaux hybrides
Matériaux intelligents
Nanostructures
Nanotubes
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Researchers at Rice University have created a synthetic material that gets stronger from repeated stress, much like the body strengthens bones and muscles after repeated workouts. Work by the Rice lab of Pulickel Ajayan, professor in mechanical engineering and materials science and of chemistry, shows the potential of stiffening polymer-based nanocomposites with carbon nanotube fillers.
The trick, it seems, lies in the complex, dynamic interface between nanostructures and polymers in carefully engineered nanocomposite materials. The team recently reported its discovery in the journal ACS Nano.En ligne : http://www.adhesivesmag.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_1000000 [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11939
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Code-barres Cote Support Localisation Section Disponibilité 013177 - Périodique Bibliothèque principale Documentaires Disponible Bonding composites and other structures / John Dubber in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 18, N° 7 (07-2011)
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Titre : Bonding composites and other structures Type de document : texte imprimé Auteurs : John Dubber, Auteur Année de publication : 2011 Article en page(s) : p. 36-38 Langues : Américain (ame) Catégories : Adhésifs structuraux
Assemblages collés
Collage structural
Composites -- Collage
Epoxydes
Polyacryliques
Polyuréthanes
Silanes
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 668.3 Adhésifs et produits semblables Résumé : Structural bonds are used to join critical load-bearing parts of an assembly. The adhesive technology for such bonding replaces (or in some cases, augments) methods such as riveting, welding or mechanical fastening with bolts and screws. It is worth noting that adhesive and other joining methods can work together. While adhesive bonding provides sufficient strength, the addition of a few appropriately placed rivets provides instant alignment, jigging and clamping advantages.
To meet the requirements of structural applications, suitable adhesives must have a combination of high shear, tensile and peel strength, along with maximum stress, impact, and shock absorbent capabilities. Because this particular set of criteria is not always easy to combine, structural adhesives feature a range of differing product characteristics and chemistries. In addition, they are designed to bond a diverse selection of materials, including composites, wood, metal and glass.
Structural adhesives also provide benefits over conventional methods of joining that include reduced weight, improved fatigue resistance, uniform stress distribution and the ability to join dissimilar materials. In many instances, less critical tolerances can be specified because of the gap-filling capability of many structural adhesives. Structural adhesives can fall into five technologies: epoxies, acrylics, polyurethanes, modified silanes and silicones. Why is such a variety needed, and where is each adhesive used?Note de contenu : - Examining epoxies
- Polyurethane possibilities
- Mulling over modified silanes
- Silicone suitability
- Acquiring assistanceEn ligne : http://www.adhesivesmag.com/Articles/Feature_Article/BNP_GUID_9-5-2006_A_1000000 [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11940
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