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Emulsified ink for stencil printing

A technology of emulsified ink and stencil printing, applied in the direction of ink, application, household appliances, etc., can solve the problems of insufficient improvement and pollution

Inactive Publication Date: 2005-11-02
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in order to improve the above-mentioned paper feed roller contamination, attempts have been made to increase the penetration rate of pigments into paper by improving the dispersibility of pigments, or to improve the fixation of pigments to paper by adding varnishes, etc., but no sufficient improvement has been achieved.
[0006] Therefore, there is still no emulsified ink for stencil printing that can greatly improve the contamination of the paper feed roller during double-sided printing without clogging or delay of the image during printing after leaving it alone. Therefore, it is desired to quickly solve the problem develop

Method used

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  • Emulsified ink for stencil printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] -Preparation of emulsified ink for stencil printing-

[0095] Rosin-modified phenolic resin (manufactured by Harima Chemicals Co., Ltd.: trade name P-140) was dissolved in spindle oil as mineral oil at 150° C. according to the formulation (mass %) shown in Table 2. Phthalocyanine blue (manufactured by Toyo Ink Seisakusho Co., Ltd.) as a colorant, sorbitan sesquioleate (manufactured by Kao Corporation: trade name Leod-Lu AO-15) as a surfactant, and sorbose Alcohol anhydride monooleate (manufactured by Kao Co., Ltd.: trade name レオド-ルAO-10), dibutyl hydroxytoluene as an antioxidant, and spindle oil as mineral oil were mixed into the resulting solution, and a high-speed Disperser, stirring at a peripheral speed of 10m / sec for 30 minutes. Then, dispersion treatment was carried out under the following conditions using a ball mill LMZ2 (manufactured by Ashizawa Co., Ltd.) to prepare an oil phase.

[0096]

[0097] Zirconia bead diameter: 1.5mm

[0098] Peripheral speed: 1...

Embodiment 2

[0103] -Preparation of emulsified ink for stencil printing-

[0104] According to the formulation (mass %) shown in Table 2, except having added glycerin to the said aqueous phase in Example 1, it carried out similarly to Example 1, and prepared the emulsion ink for stencil printing.

Embodiment 3

[0106] -Preparation of emulsified ink for stencil printing-

[0107] According to the formulation (mass %) shown in Table 2, except that carbon black (manufactured by Coronbian Ka-bon Co., Ltd., La-Ben 1080) was added as a colorant to the above oil phase, a stencil was prepared in the same manner as in Example 1. Use emulsified ink.

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Abstract

To provide an emulsion ink for use in stencil printing without demerits such as clogging after standing and retardation of image rising in printing and capable of sharply improving staining caused by a feed roller upon two sides printing.

Description

technical field [0001] The present invention relates to a water-in-oil type (W / O type) emulsified ink for stencil printing. The ink does not cause clogging after placement or image delay during printing, and greatly improves paper feeding during double-sided printing. Roll contamination. Background technique [0002] So far, the stencil printing method is to use a stencil printing base paper (stencil) with a perforated part, and to move ink from one side of the stencil to the other side through the perforated part of the stencil, thereby printing on the surface of the object to be printed such as paper Methods. In this stencil printing method, a water-in-oil type (W / O type) stencil printing ink is used, which contains a volatile solvent, a non-volatile solvent, a resin, a colorant, a surfactant, water, an antifreeze, Electrolytes, gelling agents, preservatives, etc. (see, for example, JP-A-5-117565 and JP-A-5-117564). [0003] However, in double-sided printing using a ste...

Claims

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Application Information

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IPC IPC(8): C09D11/023
Inventor 小野浩二小泉实
Owner RICOH KK