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Sheet for ink jet recording

A technology of printing sheets and printing surfaces, applied in printing, copying/marking methods, coatings, etc., which can solve the problems of hindering ink absorption, light fastness and yellowing resistance, and absorption capacity reduction

Inactive Publication Date: 2004-12-08
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the purpose of calendering is to impart gloss to the inkjet printed sheet, there is a problem that although the gloss is improved, the pores in the coating are reduced, thereby hindering ink absorption and causing a decrease in absorption capacity, resulting in no ink absorption printing flow
However, as the particle size decreases, the surface area increases greatly, thereby increasing the surface activity of the inorganic particles. As a result, the light fastness and yellowing resistance will be significantly reduced.
[0017] In summary, it is still difficult to obtain inkjet printed sheets that meet all the following requirements: high gloss, ink absorption, color density, water resistance, light fastness, and yellowing resistance, etc., using existing measures in the current technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131]

[0132] A reaction kettle was charged with 196.6 parts of deionized water and 0.5 part of stearyltrimethylammonium chloride, and heated to 70°C under nitrogen flow. To this mixture was added 0.5 part of 2,2'-azobis(2-amidinopropane) dihydrochloride. Separately, 95 parts of styrene and 5 parts of 2-hydroxyethyl methacrylate were emulsified into 40 parts of deionized water in the presence of 0.3 parts of stearyltrimethylammonium chloride, thereby obtaining an emulsified mixture. This emulsified mixture was dropped into the above reaction kettle over a period of 4 hours. The kettle contents were then maintained at the same temperature for 4 hours. Next, 0.1 part of 2,2'-azobis(2-amidinopropane) dihydrochloride was added to the mixture and kept at the same temperature for 3 hours, thereby completing the polymerization reaction.

[0133] As a result, an emulsion composition in which organic particles are dispersed in water is obtained. Its non-volatile content is 30%, ...

Embodiment 2

[0137]

[0138] The printed sheet obtained in Example 1 was pressed at a line pressure of 100 kg / cm onto a mirror roller whose surface temperature was maintained at 75° C., thereby obtaining a glossy printed sheet.

Embodiment 3

[0140]

[0141] 100 parts of synthetic amorphous silica (Fine Seal X-37B produced by Tokuyama Corporation) and 20 parts of completely saponified polyvinyl alcohol (PVA 117 produced by Kuraray Co., Ltd.) were added to water and mixed together under stirring to obtain a solid 15% coating composition. Coating basis weight with this coating composition is 105g / m 2 Wood-free paper, so that the coating amount is 20g / m2 under absolute dry conditions 2 , and bake at 120°C for 1 minute. Further, the obtained coating is coated with the emulsion composition in which the organic particles obtained in Example 1 have been dispersed in water, so that the coating amount is 10 g / m under absolute dry conditions 2 , and baked at 60°C for 30 minutes. The resulting coating was then pressed at a line pressure of 100 kg / cm onto a mirror roller whose surface temperature was maintained at 75°C, thereby obtaining a glossy print sheet.

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Abstract

A sheet for ink jet recording, comprising a sheet support and at least one ink receptive layer containing organic particles superimposed on a recording surface side of the sheet support, which sheet for ink jet recording has a recording surface exhibiting an angle of contact of dropped water with the recording surface, measured 10 sec after dropping of 4 mul of pure water on the recording surface, of 90 DEG or more and exhibiting an angle of contact of dropped ink with the recording surface, measured 1 sec after dropping of 4 mul of ink on the recording surface, of 30 DEG or less. The provided sheet for ink jet recording is excellent in ink absorptivity, is excellent in color density, light fastness and yellowing resistance, and exhibits such a water repellency that print surface can be protected from water through repelling of water despite rapid absorption of inks.

Description

technical field [0001] The present invention relates to an inkjet printed sheet for use in a printer or plotter using an inkjet printing system. Background technique [0002] Inkjet printing systems involve flying ink droplets and adhering to paper or other recording sheets to record images, text, etc. according to various operating principles. Inkjet printing systems are characterized by not only achieving high speed, low noise, and ease of multicolor, but also having great flexibility in recording modes and requiring neither developing nor fixing. Therefore, the use of the ink jet printing system is rapidly expanding in many application fields as a recording device not only for Chinese characters but also for various graphics, color images and the like. [0003] Further, regarding the image formed by the color inkjet printing system, due to the improvement of the resolution and the expansion of the color reproduction range, the quality of the color print and the color pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/52
CPCB41M5/52B41M5/00
Inventor 富田嘉彦楠木征也石田忠
Owner MITSUI CHEM INC
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