Emulsified oil ink for stencil printing

A technology of emulsified ink and stencil printing, applied in the directions of ink, printing, application, etc., can solve the problems of viscosity reduction, dispersion deterioration, ink leakage, etc., and achieve the effect of improving the emulsion stability and wear resistance over time.

Inactive Publication Date: 2007-03-14
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that pigment aggregation is promoted by adding resin, and dispersibility deteriorates
Furthermore, when the moisture in the ink evaporates over time, the problem is that the ink may drop from the nip of the ink roll due to a decrease in viscosity, or the ink may fall from the back of the drum during printing due to an increase in the plastic viscosity of the ink. side leakage, etc.; deterioration of emulsion stability over time

Method used

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  • Emulsified oil ink for stencil printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] -Preparation of emulsified ink for stencil printing-

[0161] First, an emulsifier and an oil component were mixed according to the recipe described in Table 1, and stirred by a high-speed dissolver. Thereafter, dispersion treatment was performed using a sand mill (LMZ2, manufactured by Ashizawa Finetec Co., Ltd.), to prepare an oil phase.

[0162] Next, pre-disperse the colorant, acetylene glycol, nonionic surfactant, water-soluble polymer, water, and antifreeze with a disperser mixer (manufactured by Tokuki Kagaku Co., Ltd., T.K.HOMOMIXER) according to the formulations listed in Tables 1 to 3. , an antibacterial agent, and an electrolyte were then fully dispersed with a sand mill (LMZ0.6, manufactured by Ashizawa Finetec Co., Ltd.) to prepare an aqueous phase.

[0163] Next, using an emulsifier (manufactured by Nikko Chemicals Co., Ltd., emulsification tester ET-3A type), the above-mentioned oil phase liquid was charged, and the above-mentioned aqueous phase liquid w...

Embodiment 2～11 and comparative example 1～4

[0165] In Example 1, except having changed to the composition shown in Tables 1-3, it carried out similarly to Example 1, and produced the emulsion ink for stencil printing of each example.

[0166] [evaluate]

[0167] Next, the following evaluations were performed about each obtained emulsion ink for stencil printing.

[0168] (1) Determination of dispersion time

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PUM

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Abstract

The present invention is directed to provide a water-in-oil type emulsion ink for stencil printing, having good dispersibility, excellent water resistance and abrasion resistance, and also having high emulsion stability with time. Thus, at least one of the oil phase and the water phase of the provided emulsion ink for stencil printing comprises acetylenediol and a nonionic surfactant having a HLB value of more than 10.

Description

technical field [0001] The present invention relates to a water-in-oil type (W / O type) emulsion ink for stencil printing having good dispersibility, excellent water resistance and abrasion resistance, and high emulsion stability over time. Background technique [0002] In the printing process using a stencil printing device, the specified original data is converted into a digital signal, and a plate called a stencil base paper is perforated and wound on a printing drum based on the above signal through a thermal element called a thermal head. superior. At this time, the printing ink is transferred to the printing paper through the rolled stencil base paper by using the pressing device at the lower part of the printing drum. [0003] However, the ink transferred to the printing paper is not completely dry although it appears to be dry due to penetration into the inside of the printing paper and evaporation of water into the air, and undried ink remains on the surface of the ...

Claims

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Application Information

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IPC IPC(8): C09D11/10B41M1/00C09D11/02C09D11/0235C09D11/037
Inventor 葛城弘二浅田启介
Owner RICOH KK
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