Coating fluid for inkjet high-gloss waterproof printing paper, and printing paper and preparation method thereof

A technology for coating liquid and photographic paper, applied in coating, polyurea/polyurethane coatings, etc., can solve the problems of damp discoloration, poor ink absorption, waterproof and weather resistance of photographic paper, complicated batching process, etc., and achieve good adhesion. The effect of knot and water resistance, high internal structure strength, high color reproduction

Active Publication Date: 2015-05-20
潍坊恒彩数码影像材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Most of the adhesives of existing photo paper are acrylic coatings, and acrylic emulsions are used as adhesives in inkjet printing coatings to reduce The content of hydroxyl functional groups with strong hydrophilicity in the molecular structure of the coating liquid makes the water resistance of the coating poor, so that the adhesion between the coating liquid and the substrate is poor; and the batching process is complicated, containing about 50% of organic solvents, these Organic solvents will spread into the air during the batching and coating production process, polluting the workshop environment and endangering human health, making it difficult to meet the requirements of environmental protection
[0004] Existing acrylic-coated inkjet photo papers have many drawbacks. Most of the products are not waterproof and are susceptible to discoloration due to humidity in the air. The surface gloss of some photo papers does not reach the desired effect. The lack of three-dimensional effect affects the aesthetic effect, that is to say, the ink absorption, water resistance and weather resistance of the existing acrylic-coated photo paper are relatively poor

Method used

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  • Coating fluid for inkjet high-gloss waterproof printing paper, and printing paper and preparation method thereof
  • Coating fluid for inkjet high-gloss waterproof printing paper, and printing paper and preparation method thereof
  • Coating fluid for inkjet high-gloss waterproof printing paper, and printing paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation of embodiment 1 cationic aqueous polyurethane emulsion

[0051] Firstly, toluene diisocyanate (TDI), polytetrahydrofuran (PTMG), and N-methyldiethanolamine (MDEA) were dehydrated in vacuum at 120°C and 4kPa for 2 hours, and sealed and stored for later use. Other raw materials were used directly.

[0052] (1). Add 20-30 parts by weight of toluene diisocyanate (TDI), 5-10 parts by weight of polytetrahydrofuran (PTMG) and 1- 3 parts by weight of polyether polyol (PPG, molecular weight: 2000), stirred evenly and heated to 90°C for 2-3h of polymerization reaction;

[0053] (2). Cool down to 70°C, then slowly add the hydrophilic chain extender N-methyldiethanolamine (MDEA) dropwise in an amount of 2-5 parts by weight, and react at 80°C for 2-4 hours to obtain prepolymerized polyurethane body; use di-n-butylamine titration to measure isocyanate (-NCO) content, and after the -NCO content reaches the theoretical value, cool down to about 45°C;

[0054] (3). In...

Embodiment 2

[0060] Embodiment 2 Preparation of Inkjet High Gloss Waterproof Photo Paper Coating Solution

[0061] Such as figure 1 As shown, the schematic flow chart of the preparation of inkjet high-gloss waterproof coating solution,

[0062] 1) at first prepare cationic aqueous polyurethane emulsion, specifically adopt the preparation method of embodiment 1;

[0063] 2) Prepare the coating solution, the specific steps are as follows:

[0064] Add 10-40 parts by weight of toner adsorbent to 140-200 parts by weight of distilled water, stir evenly, and then add 30-55 parts by weight of cationic water-based polyurethane emulsion (ie adhesive), the cationic water-based polyurethane The emulsion adopts the emulsion prepared in Example 1. After stirring evenly, add 0.05-0.15 parts by weight of dispersant and stir. During the stirring process, add 0.05-0.15 parts by weight of whitening agent, 2-5 parts by weight of defoamer, 1 - 3 parts by weight of a neutralizing agent, stirred evenly, and ...

Embodiment 3

[0067] The preparation of embodiment 3 ink-jet high waterproof photographic paper

[0068] Use the double-sided coated paper base as the substrate, coat the coating liquid prepared in Example 2 on the substrate, and form an ink-absorbing coating after drying, that is, to obtain an inkjet high-gloss waterproof photographic paper. Further, as a preferred option, in The other side of the double-sided film-coated paper base is coated with the cationic water-based polyurethane emulsion prepared in Example 1 for primer coating, which improves the adhesion between the primer and the substrate, makes the primer and the substrate more firmly combined, and effectively prevents the prepared photographic paper from It can prevent deviation during printing and play an anti-skid role.

[0069] The photographic paper prepared in this example has a high internal structural strength of the coating, good adhesion to the substrate, and good scratch resistance on the coating printing surface; it ...

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Abstract

The invention discloses a coating fluid for preparing inkjet high-gloss waterproof printing paper, which comprises the following components in parts by weight: 10-40 parts of ink powder adsorbent, 30-55 parts of adhesive, 0.05-0.15 part of whitener, 0.05-0.15 part of dispersing agent, 2-5 parts of defoaming agent, 1-3 parts of neutralizer and 140-200 parts of distilled water. The adhesive is a cationic water-based polyurethane emulsion. The invention also discloses a printing paper for preparing the coating fluid and a preparation method thereof. The coating fluid has the advantages of no toxicity, no odor, favorable bonding property and favorable water resistance; the coating has favorable weather resistance and can bear sunlight irradiation for a long time; the coating has the advantages of high internal-structure strength and favorable adhesion for the substrate; and the coating printing surface has favorable scratch resistance. The printing paper prepared from the coating fluid has the advantages of ultrahigh drying rate after ink absorption, bright color, high color reduction degree, no piling phenomenon and favorable waterproof effect; and the output image has clear and sharp picture.

Description

technical field [0001] The invention relates to the technical field of ink-jet photo paper, in particular to a coating solution for ink-jet high-gloss waterproof photo paper, a photo paper and a preparation method for the photo paper. Background technique [0002] With the enhancement of people's awareness of environmental protection and energy, especially the strict restrictions on the content of volatile organic compounds (VOC) in the coating liquid system by various environmental protection regulations, the issue of material safety has attracted more and more attention from consumers. The inkjet printing coating Adhesives and other additives put forward higher standards and requirements. [0003] Most of the adhesives of existing photographic papers are acrylic coatings, and acrylic emulsions are used as adhesives in inkjet printing coatings to reduce the content of highly hydrophilic hydroxyl functional groups in the molecular structure of the coating liquid. The water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12B41M5/52
Inventor 宫新建鲁在君
Owner 潍坊恒彩数码影像材料有限公司
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