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Ink jet recording sheet

A recording sheet, inkjet technology, applied in the direction of copying/marking method, printing, printing device, etc., can solve the problems of strong shrinkage, brittle strength, easy peeling, etc.

Inactive Publication Date: 2006-07-12
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such ultrafine particles with a secondary particle size of 1 μm or less are used, the pore diameter becomes small due to the small particle size, and there is a problem in production that the ink-receiving layer is prone to cracking in the drying process due to the strong capillary contraction force. crack
The above-mentioned bulletin suggests adding water-soluble metal compounds, but the pH of the membrane surface must be 3-5
In addition, since fumed silica has a particularly strong capillary contraction force during the drying process compared with wet silica, therefore, in addition to the above method when manufacturing a completely cracked receiving layer, it must also be used The method of crosslinking the binder resin with boric acid, the receiving layer formed in this way has the disadvantage of becoming brittle and easy to peel off under high temperature and high humidity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] In 100 parts of fine silica dispersion liquid A, mix 0.5 part of a 10% aqueous solution of sodium chloride and polyvinyl alcohol (manufactured by Kuraray Co., Ltd., trade name: PVA-140) with a degree of saponification of 98.5% and a degree of polymerization of 4000. 40 parts of 10% aqueous solution were formulated into a coating with a solid content concentration of 17.1% containing 0.25 parts of sodium chloride and 20 parts of polyvinyl alcohol relative to 100 parts of silica, and ion-exchanged water was added to make the concentration 16.0%. The main components and pH of the paint are shown in Table 1. The paint bar is coated on the support body to the coating amount is 20g / m in terms of dry mass 2 . This film was dried at 120° C. to form a porous ink receiving layer.

[0134] Then, on the ink-receiving layer, bar coating was performed by mixing 22 parts of a 10% aqueous solution of polyvinyl alcohol having a degree of saponification of 98.5% in 100 parts of cationi...

Embodiment 2

[0158] In 100 parts of fine silicon dioxide dispersion liquid A, mix 0.5 part of 10% aqueous solution of sodium sulfate and 40 parts of 10% aqueous solution of polyvinyl alcohol used in Example 1, be formulated to contain 0.25 parts of sodium sulfate relative to 100 parts of silicon dioxide 1. The solid content concentration of 20 parts of polyvinyl alcohol is the coating of 17.1%, and it is the coating of 16.0% to use to add ion-exchanged water dilution concentration, except that, with the same method as embodiment 1, porous ink receiving layer and Gloss-developing layer to produce an inkjet recording sheet. Table 1 shows the main components, pH, and lamination method of the glossy layer. Table 2 shows the pore distribution, cracks, film surface pH, and inkjet recording sheet quality of the porous ink receiving layer.

Embodiment 3

[0160] In 100 parts of fine silica dispersion liquid A, 1 part of a 10% aqueous solution of sodium sulfate and 10 parts of polyvinyl alcohol (manufactured by Kuraray Co., Ltd., trade name: PVA-635) with a saponification degree of 95.0% and a polymerization degree of 3500 were mixed. 40 parts of aqueous solution, prepared as relative to 100 parts of silicon dioxide, containing 0.5 parts of sodium sulfate and 20 parts of polyvinyl alcohol, with a solid content concentration of 17.1%, and adding ion-exchanged water to dilute the coating with a concentration of 16.0%. In addition, in the same manner as in Example 1, a porous ink-receiving layer and a glossy layer were provided to produce an inkjet recording sheet. Table 1 shows the main components, pH, and lamination method of the glossy layer. Table 2 shows the pore distribution, cracks, film surface pH, and inkjet recording sheet quality of the porous ink receiving layer.

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Abstract

The present invention discloses an ink-jet recording sheet which, on at least one surface of a support, has a porous ink absorbing layer containing fine particle silica having the average particle size of 0.5 m or smaller produced by wet process, electrolytes such as alkaline metal salts and alkaline earth metal salts, and polyvinyl alcohol; and then has a gloss layer. The ink-jet recording sheet has excellent features, that is, it has gloss like that of photographic printing paper, the excellent ink absorption speed and ink absorption capacity, and does not produce defects of the coating due to the cracks generated during drying in production processes of the ink absorbing layer. Therefore, the ink-jet recording sheet is suitable as a recording sheet for an ink-jet printer.

Description

[0001] technology area [0002] The present invention relates to an ink-jet recording sheet, and more particularly to an ink-jet recording sheet having photo printing paper-like gloss, high ink absorption speed and ink absorption capacity, and no cracks in the ink receiving layer. Background technique [0003] The inkjet recording method is a recording method suitable for personal use because inexpensive color printing can be performed with a simple device, and it is rapidly spreading in office and home printing applications. Due to the rapid improvement in image quality due to the realization of full color and high resolution in recent years, it has attracted attention as a simple output format of color images, and it is considered to be one of the most powerful alternatives to silver halide photography. Therefore, there is an increasing demand for inkjet recording sheets having high image quality and high gloss comparable to silver halide photography. [0004] Since the ink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/00B41J2/01B41M5/50B41M5/52
CPCB41M5/5218B41M5/506B41M2205/38B41M5/52
Inventor 中田将裕大河茜田尻耕三
Owner OJI PAPER CO LTD
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