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Method for preparing gravure composite ink

An ink and gravure technology, applied in the field of gravure composite ink preparation, can solve the problems of reduced printing adaptability of ink products, ineffective wetting and dispersion of pigments, poor ink stability, etc., and achieve bright hue and good storage stability , The effect of ink thixotropy reduction

Inactive Publication Date: 2012-07-18
洋紫荆油墨(河北)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feeding process in the conventional production steps is to put in several kinds of required solvents according to the formula, and then put in several kinds of resins or resin liquids, add the pigments into the liquid binder at one time and then disperse, and the step of adding the pigments while dispersing without boundaries, Pigments cannot be effectively wetted and dispersed, which will cause pigment precipitation, directly affect the sanding effect, and reduce the printing adaptability of the final ink product
The stability of the ink produced in this way is not good, and the fineness will return to coarse during the storage of the ink.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of gravure composite printing ink, comprises the following steps:

[0033] (1) Preparation of resin liquid: Put the solvent into the dispersing tank according to the formula, disperse until the solvent is evenly mixed, start adding solid resin, the adding speed of solid resin is 20kg / min, stop dispersing after the solid resin is fully dissolved, and obtain Resin liquid, the dispersion speed is 800 rpm;

[0034] (2) Feeding: Put the resin liquid into the dispersion tank according to the formula, disperse until the resin liquid is evenly mixed, then add the solvent, and make the liquid binder after the solvent and the resin liquid are evenly mixed, and the dispersion speed before adding the pigment is 700 rpm / minute; Pigment is joined in the liquid binder, and the adding speed of pigment is 20kg / min, and stop dispersing after pigment and liquid binder mix homogeneously, obtain ink material, start to add the dispersion speed after pigment to be 130...

Embodiment 2

[0047] The preparation method of gravure composite printing ink, comprises the following steps:

[0048] (1) Preparation of resin liquid: Put the solvent into the dispersing tank according to the formula, disperse until the solvent is evenly mixed, start adding solid resin, the adding speed of solid resin is 25kg / min, stop dispersing after the solid resin is fully dissolved, and obtain Resin liquid, the dispersion speed is 1000 rpm;

[0049] (2) Feeding: Put the resin liquid into the dispersion tank according to the formula, disperse until the resin liquid is evenly mixed, then add the solvent, and make the liquid binder after the solvent and the resin liquid are evenly mixed, and the dispersion speed before adding the pigment is 800 rpm / minute; Pigment is joined in the liquid binder, and the adding speed of pigment is 25kg / minute, stops dispersion after pigment and liquid binder mix homogeneously, obtain ink material, and the dispersion speed after beginning to add pigment...

Embodiment 3

[0062] The preparation method of gravure composite printing ink, comprises the following steps:

[0063] (1) Preparation of resin liquid: Put the solvent into the dispersing tank according to the formula, disperse until the solvent is evenly mixed, then start adding the solid resin, the adding speed of the solid resin is 10kg / min, stop the dispersion after the solid resin is fully dissolved, and obtain Resin liquid, the dispersion speed is 600 rpm;

[0064] (2) Feeding: Put the resin liquid into the dispersion tank according to the formula, disperse until the resin liquid is evenly mixed, then add the solvent, and make the liquid binder after the solvent and the resin liquid are evenly mixed, and the dispersion speed before adding the pigment is 600 rpm / minute; Pigment is joined in the liquid binder, and the adding speed of pigment is 10kg / min, and stop dispersing after pigment and liquid binder mix evenly, obtain ink material, start to add the dispersion speed after pigment...

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PUM

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Abstract

The invention discloses a method for preparing gravure composite ink, and belongs to the field of ink preparation. The method comprises the following steps of: 1) preparing resin liquid, namely dispersing until a solvent is uniformly mixed, adding solid resin, and fully dissolving the solid resin to prepare the resin liquid; (2) feeding, namely dispersing until the resin liquid is uniformly mixed, adding a solvent, and uniformly mixing to prepare a liquid binder; and adding a pigment, and uniformly mixing the pigment and the liquid binder to obtain an ink material; (3) sanding; and (4) adjusting, namely dispersing the ink material, adding an aid, and dispersing until the aid and the ink material are uniformly mixed. The adhesion index of the ink is improved from more than or equal to 85 percent to more than or equal to 95 percent, so that the composite strength of the ink is higher; the viscosity of the ink is more stable, and the thixotropy of the ink is greatly reduced; the loss rate of the ink in the production process is reduced from about 5 percent to about 2.5 percent; and the hue of the ink is brighter, and chroma is improved by 5 to 10 percent.

Description

technical field [0001] The invention relates to a method for preparing gravure composite ink, belonging to the field of ink preparation. Background technique [0002] Gravure composite ink can be applied to OPP, BOPP, CPP, PE, aluminum foil and aluminized film and other materials, and can provide excellent adhesion on OPP and BOPP, and the product has extremely low solvent residue, which can meet the requirements of food packaging. The feeding process in the conventional production steps is to put in several kinds of required solvents according to the formula, and then put in several kinds of resins or resin liquids, add the pigments into the liquid binder at one time and then disperse, and the step of adding the pigments while dispersing without boundaries, Pigments cannot be effectively wetted and dispersed, which will cause pigment precipitation, directly affect the sanding effect, and reduce the printing adaptability of the final ink product. The stability of the ink pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10
Inventor 麦允程
Owner 洋紫荆油墨(河北)有限公司
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