Dispersible record materials or media include a water-soluble or water-dispersible paper substrate, a printable layer carried by the substrate, and a base coat between the substrate and the printable layer. The printable layer may be a thermally responsive layer, e.g. containing a leuco dye and an acidic color developer, or an inkjet receptive layer. The binder material used in the base coat, and the base coat itself, are non-water-soluble, but nevertheless tailored in such a way that the record material as a whole is water-dispersible, i.e., it breaks apart under the influence of water with minimal agitation. The binder material of the base coat is preferably a non-resinous binder, a particulate binder, and/or a binder derived from a dispersion, such as latex. Use of such a binder material in a carefully selected concentration, with other elements, provides a base coat that allows for high quality images to be thermally printed at high print speeds on the thermally responsive layer.
B41M 5/42 - Couches intermédiaires ou couches de couverture
B41M 5/44 - Couches intermédiaires ou couches de couverture caractérisées par les composés macromoléculaires
B41M 5/50 - Feuilles d'enregistrement caractérisées par les revêtements utilisés pour améliorer la réceptivité aux encres, aux colorants ou aux pigments, p. ex. pour jet d'encre ou pour l'enregistrement par transfert thermique de colorants
2.
DIRECT THERMAL RECORDING MEDIA WITH PERFORATED PARTICLES
Direct thermal recording media are designed to operate based on a thermally-induced change of state rather than a thermally-induced chemical reaction between a leuco dye and an acidic developer. The media use two types of scattering particles (325, 327), one of which changes its state from solid to liquid during printing, and the other of which does not. The former particles (327), upon melting, fill spaces between the latter particles, thus eliminating or substantially reducing light scattering, which makes an underlying colorant visible at selected print locations where heat is locally applied. The latter, higher melting point particles (325) have a caged morphology and comprise perforated particles. The media can provide high quality thermally-produced images at print speeds at least as high as 250 mm/sec.
B41M 5/36 - Thermographie utilisant une pellicule polymère qui peut être sous forme de particules et qui est soumise à une modification de forme ou de structure avec modification de ses caractéristiques, p. ex. de ses caractéristiques d'hydrophobie-hydrophilie, de ses caractéristiques de solubilité ou de perméabilité
B41M 5/28 - Thermographie utilisant des composés thermochromes ou des couches contenant des cristaux liquides, des microcapsules, des colorants blanchissables ou des composés thermodégradables, p. ex. libérant un gaz
A secure substrate (100) may include a base layer (102) and an opacity layer (104) disposed above the base layer (102). An optional background layer (108) may be disposed above the opacity layer (104). The secure substrate (100) may further include an inkjet receptive layer (112). A first inkjet receptive layer (112-1) may be disposed above the background layer (108), and a second inkjet layer (112-2) may be disposed below the base layer (102). The opacity layer (104) may include copper such as metallic copper flakes or other particles. The opacity layer (104) may also include a binder material such as polyvinyl alcohol, and in some cases also carbon black, process black, or the like.
Dual functionality recording media are disclosed. The recording media or materials can impart information both by direct thermal printing, and by being receptive to a modified inkjet printing technology known in the art as Memjet™ printing, which combines microelectromechanical systems (MEMS) and inkjet technology. The recording materials include a base substrate to which several coatings are applied. The coatings are selected to provide both direct thermal functionality and receptivity to Memjet-type dye-based inks as applied in Memjet-type printing systems. Heat-sensitive recording capability is provided by a leuco dye/acidic developer combination. Receptivity to Memjet-type dye-based printing is provided by a topcoat of suitable composition. The present inventors recognized that Memjet-type inks printed onto the topcoat suffer from a graying problem, but the problem is solved by appropriate selection of the leuco dye/acidic developer combination.
B41M 5/323 - Formateurs de couleurs organiques, p. ex. leuco-dérivés
B41M 5/333 - Composants pour le développement des couleurs, p. ex. composés acides
B41M 5/42 - Couches intermédiaires ou couches de couverture
B41M 5/50 - Feuilles d'enregistrement caractérisées par les revêtements utilisés pour améliorer la réceptivité aux encres, aux colorants ou aux pigments, p. ex. pour jet d'encre ou pour l'enregistrement par transfert thermique de colorants
Direct thermal recording media are designed to operate based on a thermally-induced change of state rather than a thermally-induced chemical reaction between a leuco dye and an acidic developer. The media use two types of solid scattering particles, one of which changes its state from solid to liquid during printing, and the other of which does not. The former particles, upon melting, fill spaces between the latter particles, thus eliminating or substantially reducing light scattering, which makes an underlying colorant visible at selected print locations where heat is locally applied. The media can provide high quality thermally-produced images at print speeds at least as high as 25 cm/sec.
B41M 5/36 - Thermographie utilisant une pellicule polymère qui peut être sous forme de particules et qui est soumise à une modification de forme ou de structure avec modification de ses caractéristiques, p. ex. de ses caractéristiques d'hydrophobie-hydrophilie, de ses caractéristiques de solubilité ou de perméabilité
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Coated and uncoated thermal paper, namely, industrial coated
and uncoated thermal paper for printing, recording,
electrophotography printing, inkjet printing, UV ink
printing, unprinted thermal tags and labels, coated thermal
paper in fluorescent colors, synthetic thermal paper, label
face stock with pressure sensitive adhesive layer. Coated and uncoated thermal paper-film laminates, namely,
thermal paper-film laminates for printing, recording,
electrophotography printing, inkjet printing, UV ink
printing, polyalkylene film coated with toner adhesive,
thermal printing and label laminates for paper and
polyalkylene film with pressure sensitive adhesive layer,
thermal printing and label laminates for paper and polyester
film with pressure sensitive adhesive layer, polyester film
coated with toner for printing.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
Produits et services
Coated and uncoated paper, namely, industrial coated paper,
printing and recording paper, unprinted tags and labels,
coated paper in fluorescent colors, synthetic paper, label
face stock with pressure sensitive adhesive layer. Coated and uncoated paper-film laminates for printing,
polyalkylene film coated with toner adhesive for printing,
printing and label laminates of paper and polyalkylene or
polyester film with pressure sensitive adhesive layer,
paper-film-paper laminates for printing, polyester film
coated with toner adhesive for printing.
(1) Security paper stock, paper tags and paper labels with authenticity indicators capable of being imprinted with information according to the intended use of said tags and labels
(2) Security paper stock, paper tags and paper labels with authenticity indicators capable of being imprinted with information according to the intended use of said tags and labels
A rapidly reversing authenticity indicator for substrates such as secure documents, tags and labels is described. The authenticity indicator comprises a substrate having provided thereon a coating of a colorless chromogenic material, a binder material and optional pigment. An applicator is provided containing a developer material solution for the colorless chromogen. In one embodiment, the developer material solution is preferably an organic acid of five carbons or less and is selected to have a molecular weight of 102 or less, a pH of less than 5, and preferably positive vapor pressure. The coated substrate when contacted with the developer material in the applicator develops an intense color that persists momentarily rapidly reverting to substantially a colorless or pale form to provide a visual indication of authenticity without permanent discoloration of the substrate or inadvertent coloration or undue false positives.
(1) Coated printing papers and paper-like substrates, namely security papers with authenticity indicators for use in printing documents, tags and labels.
