Ink jet recording medium and process for producing the ink jet recording medium

Abstract

Disclosed is an ink jet recording medium that has an excellent glossy impression, has a high print density in ink jet recording using a dye ink, and has excellent ink absorption and waterfastness. The ink jet recording medium is produced by forming a coating layer containing a pigment and a binder on at least one side of an air permeable support and then coating a coagulating agent, which coagulates the binder, onto the surface of the coating layer to provide an ink receptive layer by a coagulation cast coating method. A boron compound, a cationic resin, and a cationic colloidal silica contained in the coagulating agent are present on the surface of the ink receptive layer.

Description

technical field [0001] The present invention relates to a glossy inkjet recording medium suitable for inkjet recording and a method for producing the same. Background technique [0002] Inkjet recording media are composed of an ink-receiving layer containing porous pigments such as silica and alumina and a binder on the surface of a support such as paper, and ink droplets are fixed on the ink-receiving layer. . Furthermore, due to the dramatic progress of inkjet printers and the remarkable spread of digital cameras in recent years, the quality required of recording media for inkjet is also increasing year by year. In particular, the quality requirements for an inkjet recording medium having a gloss comparable to that of a conventional silver salt photograph have been stringent, and technical development has been actively carried out. [0003] The aforementioned glossy inkjet recording medium is generally produced by a cast coating method using a cast coater from the viewpo...

AI Technical Summary

Problems solved by technology

[0009] However, in the case of the technologies described in the above-mentioned Patent Documents 1 and 2, there is room for improvement in terms of high gloss of the recording medium, and when inkjet recording is performed with a dye ink, due to the pigment contained in the ink receiving layer, there is room for improvement. The average particle size is large, so there is a problem of reduced printing density

[0010] In addition, in the case of the technology described in Patent Document 3, since colloidal silica with a small average particle size exists on the surface of the ink receiving layer, although the printing density of the dye ink is increased, there is no surface of the ink receiving layer to fix the ink. Cationic resin, so there is a problem of poor water resistance

[0011] In addition, in the technique described in Patent Document 3, if the colloidal silica in the coagulant is anionic, aggregation with the cationic resin will occur, so the cationic resin cannot be added, so the fixability of the ink deteriorates. , ink absorption and water resistance become poor

In addition, when the above-mentioned colloidal silica is cationic, aggregation with borate occurs, so borate cannot be added to the coagulant, so the coagulation action becomes insufficient, and a problem arises in operability.

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