How Sublimation Ink Works on Dye Sublimation Transfer Paper (2)

sublimation ink
The sublimation ink receptive coating composition includes, as solid components, at least a filler and a binder. The provides the desired properties of holding the sublimable dye in place and allowing for the separation and absorption of the carrier from the sublimable dye. The binder helps hold the filler to the paper substrate. The applicants have found that silica (preferably amorphous silica) can be used as a filler in an amount to provide desired properties. The sublimation ink receptive coating composition can include silica at a level of at least about 30 Wt. % and preferably at least about 35 Wt. % based on the solids Weight of the composition.
 
In addition, the coating composition can contain about 35 Wt.% to about 90 Wt. % silica based on the solids Weight of the composition. Furthermore, the sublimable ink receptive coating can include silica in an amount of about 40 Wt. % to about 80 Wt. % based on the solids Weight of the composition. Other fillers can be used in addition to silica. The sublimable ink receptive coating can include a sufficient amount of binder to hold the filler to the paper substrate. The sublimable ink receptive coating can include at least about 5 Wt. % binder, ,and preferably about 5 Wt. % to about 40 Wt. % binder, and preferably about 10 Wt. % to about 30 Wt. %, based on the solids Weight of the composition.
sublimation ink
The dye sublimation ink receptive coating composition can additionally be characterized by the amount of filler and the Weight percent of the filler that is silica. The sublimable ink receptive coating can be provided containing about 40 Wt.% to about 95 Wt. % filler, based on the solids Weight of the coating composition, and about 5 Wt. % to about 40 Wt. % binder based on the solids Weight of the composition. The coating composition can include about 50 Wt. % to about 90 Wt. %, or about 60 Wt. % to about 80 Wt. % of the filler based on the solids Weight of the coating composition. In addition, the coating composition can contain about 10 Wt. % to about 35 Wt. %, or about 15 Wt. % to about 30 Wt. % of the binder, based on the solids Weight of the coating composition. The filler can include at least about 30 Wt. % silica based on the Weight of the filler component. Preferably, the filler contains at least about 40 Wt. % silica, and preferably at least about 50Wt. % silica based on the Weight of the filler. The filler can contain up to 100% silica based on the Weight of the filler.
 
Examples of suitable filler  materials include silica (e.g., amorphous silica, calcined silica, fumed silica), clays (e. g., calcined clay), calcium carbonate, talc, kaolin, and
other known filler . Silica filler is a preferred filler , and may be combined With one or more additional fillers such as clay and calcium carbonate. Amorphous silica is a preferred silica.
sublimation ink
The binder can be provided as a polymeric material. Exemplary binders include polyvinyl alcohol, acrylics, latexes (including acrylic latex), natural polymer (e. g., starch)
or mixtures thereof. The binder may be solvent based (e.g., organic solvent or Water based) and preferably can be readily dried by conventional sublimation paper making processing. The polymers additionally, in some embodiments, inhibit dusting during the printing process.