Dépouillements

Big things in small packages / Derrick Dean in ADHESIVES AGE, Vol. 46, N° 3 (04-05/2003)  

[article]  inADHESIVES AGE > Vol. 46, N° 3 (04-05/2003) . - p. 12-19 Titre : Big things in small packages : Opportunities and challenges await nano-engineered adhesives, sealants and coatings Type de document : texte imprimé Auteurs : Derrick Dean, Auteur ; M. Abdalla, Auteur ; S. Ganguli, Auteur Année de publication : 2003 Article en page(s) : p. 12-19 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Colles:Adhésifs Ester de cyanate Mastics Matériaux hybrides Nanofibres Nanostructures Nanotechnologie Nanotubes Polymères Polyuréthanes Revêtements Thermoplastiques Une matière thermoplastique désigne une matière qui se ramollit (parfois on observe une fusion franche) d'une façon répétée lorsqu'elle est chauffée au-dessus d'une certaine température, mais qui, au-dessous, redevient dure. Une telle matière conservera donc toujours de manière réversible sa thermoplasticité initiale. Cette qualité rend le matériau thermoplastique potentiellement recyclable (après broyage). Cela implique que la matière ramollie ne soit pas thermiquement dégradée et que les contraintes mécaniques de cisaillement introduites par un procédé de mise en forme ne modifient pas la structure moléculaire. Traction (mécanique) Index. décimale : 668.3 Adhésifs et produits semblables Résumé : The ability to organize, characterize and manipulate matter at the nanoscale represents a relatively new paradigm by which materials with a range of significantly enhanced properties can be developed. As a result, the materials industry, in general, is expected to reap significant benefits from the nanostructured approach. Nanostructured polymeric materials, specifically, adhesives, sealants and coatings can benefit from this approach and should be attractive both technologically and economically. The propensity to develop a char layer and the decreased mass loss rates attributable to the barrier properties of layered silicates could result in adhesives and coatings with improved fire retardance and flame resistance. Coatings and sealants with enhanced barrier properties are also possible and could find many applications. The development of nanocomposites using nanotubes or other conductive nanoparticles could lead to adhesives, sealants and coatings with multifunctional behavior. Potential applications could include electromagnetic shielding, as well as conductive fibers and tapes. Materials that combine enhanced mechanicals with wear resistance and dimensional stability could find use in shelters and packaging. Many other applications based on combinations of polymers and nanoelements can be developed, depending upon the applications. En ligne : https://drive.google.com/file/d/1M2xoJ2PgJrPjtDYPwAx0ysh26BXNUDgb/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8708 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001480	-	Périodique	Bibliothèque principale	Documentaires	Disponible

The ABCs of PSAs in ADHESIVES AGE, Vol. 46, N° 3 (04-05/2003)  

[article]  inADHESIVES AGE > Vol. 46, N° 3 (04-05/2003) . - p. S16-S18 Titre : The ABCs of PSAs : What you should know about the manufacture, specification and application of these products Type de document : texte imprimé Année de publication : 2003 Article en page(s) : p. S16-S18 Langues : Américain (ame) Catégories : Adhésifs sensibles à la pression Index. décimale : 668.3 Adhésifs et produits semblables Résumé : pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive label in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. The box was filled with adhesive, which then dripped through the holes onto a narrow roll of paper that ran below. The thickness of the adhesive coating was regs lated by narrowing the cigar box holes with pieces of tape, producing pressure-sensitive labels that could be applied without moistening or glue. Such "technology" seems primitive when compared to the multi-million dollar, sophisticated coaters that operate today. In medical devices, the use of PSAs provides versatility and design flexibility to meet the demands of the ever-changing marketplace. Pressure-sensitive adhesives can be defined as "a distinct category of adhesive tapes which in dry form are aggressive and permanently tacky at room temperature." PSAs will adhere to a variety of substrates when applied with pressure, and do not require activation by water, heat or sol-vent. They will have sufficient cohesive strength so they can be handled with fingers. The primary mode of bonding for a PSA is not chemical or mechanical, but rather a polar attraction with the substrate, and always requires pressure to achieve sufficient "wet out" onto the surface to obtain sufficient adhesion. Note de contenu : - Hot melts - Sprays adhesives - Liquid adhesives - Other adhesive types - Mechanical fasteners - Solvent-based - Hot melt - Emulsion - Rubber-based - Acrylic - Modified acrylic - Silicone - PERFORMANCE CHARACTERISTICS : Rubber-based performance characteristics - Acrylic-based performance characteristics - Modified rubber-based performance characteristics - Tackified acrylic performance characteristics - Crosslinked acrylic performance characteristics - Silicone-based - TYPICAL CONSTRUCTION TYPES : Self wound - NON-ADHESIVE COMPONENTS OF PSA TAPES : - APPLICATION & SELECTION : Solvent exposure - UV/weatherability - UV/weatherability - Humidity/moisture - CONVERTING En ligne : https://drive.google.com/file/d/1lsmoTawHhgaeI_mRcTy3pWYLyhP3H5o_/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19941 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
001480	-	Périodique	Bibliothèque principale	Documentaires	Disponible