| Titre : |
Fumed metal oxide dispersions expand aqueous inkjet printing substrates |
| Type de document : |
texte imprimé |
| Auteurs : |
Tianqi Liu, Auteur ; Koen Burger, Auteur |
| Année de publication : |
2019 |
| Langues : |
Américain (ame) |
| Catégories : |
Alcool polyvinylique
Alumine
Couche de base
Dispersions et suspensions
Encre en phase aqueuse
Floculation
Impression jet d'encre
Liants
Matières plastiques -- Revêtement
Oxydes métalliques
Polyéthylène téréphtalate
Polyuréthanes
Potentiel zeta
Revêtements organiques
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
As aqueous inkjet continues to take market shares from traditional printing techniques, it must expand its substrates from traditional office paper to a broader spectrum of substrates used for packaging, signage and labels. CAB-O-SPERSE® silica and alumina dispersions can help prime difficult substrates to work with aqueous inkjet inks because of the porosity they generate and their surface charge characteristics. These dispersions enable the formulation of precoats that can greatly enhance optimized image quality such as high color saturation, less mottle and wet smudge resistance. They also offer stability and flexibility in the waterborne coating systems. |
| Note de contenu : |
- Fumed metal oxide dispersions - key component in an aqueous inkjet receptive coating
- Dispersions offer stability and flexibility in waterborne coatings
- Fig. 1 : Examples of aqueous inkjet printing issues due to slow liquid removal from the printing surface
- Fig. 2 : Pore volume distribution in coatings made with fumed metal oxide dispersions
- Fig. 3 : Kyocera test bed printing at 250 feet/min of an aqueous inkjet ink sets on PET substrates. A: original PET film ; B : PET film precoated with PG003 dispersion and a polyurethane binder ; C : timed finger smear test on cyan color printed on the precoated PET
- Fig. 4 : Kyocera test bed printing at 250 feet/min of an aqueous inkjet ink set on a porous substrate. Three secondary colors (blue, red and green) and one composite black (cyan, magenta and yellow) are printed. A : original paper liner for corrugated board ; B : paper liner precoated with PG003 dispersion and a polyurethane binder
- Fig. 5 : Schematic illustration of an inkjet receptive coating made using a silica dispersion and a polymer binder
- Fig. 6 : Zeta potential curves for two representative silica dispersions
- Fig. 7 : Stability of a fumed silica dispersion (2020K) on the left vs a surface modified calcium carbonate dispersion (on the right) in the presence of a polyvinyl alcohol binder after overnight
- Fig. 8 : Photos of an image under films coated on PET. A : coating made using dispersion 4012K ; B : coating made using dispersion 1030K
- Fig. 9 : Flocculation in a cationic coating system with low charge density cationic silica and a cationic polymer latex
- Fig. 10 : Coating solution stability at t=1hr and t= 1 month when cationic silicas are mixed with a cationic charged polyurethane binder. Vial on the left : low charge density cationic silica; vial on the right : higher charge density cationic silica |
| En ligne : |
https://www.coatingsworld.com/issues/2019-03-01/view_technical-papers/fumed-meta [...] |
| Format de la ressource électronique : |
Html |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32509 |
in COATINGS WORLD > Vol. 24, N° 3 (03/2019)
Aller sur edunet
Accueil
Fumed metal oxide dispersions expand aqueous inkjet printing substrates in COATINGS WORLD, Vol. 24, N° 3 (03/2019)
