KR20030070379A - A copying paper having color revelation property - Google Patents

Abstract

PURPOSE: A copying paper having color revelation property is provided in which a preprinted or coated color-forming solution is revealed so that the owner mark is conveniently made on the copying paper when the copying paper is used in copying machine, printer and facsimile machine without printing or recording of owner mark on the copying paper. CONSTITUTION: The copying paper having color revelation property is characterized in that it is formed by printing or coating an initial color-forming solution and final color-forming solution on one surface of the copying paper, the initial color-forming solution comprises 15 to 25 wt.% of dyes as color-forming component, 35 to 45 wt.% of one compound selected from tartaric acid, gallic acid, lactic acid, activated clay, bisphenol A, salicylic acid and zinc salicylate as color-developing component for developing the color-forming component, 15 to 25 wt.% of one compound selected from calcium carbonate, clay, diatomaceous earth, silicon oxide and zinc white as lubricant for smoothing printing and coating, 10 to 20 wt.% of sensitizer or desensitizer for controlling sensitivity, and 1 to 10 wt.% of antifoaming agent and dispersing agent, and the final color-forming solution comprises 20 to 30 wt.% of the initial color-forming solution, 40 to 55 wt.% of calcium carbonate as lubricant, 20 to 35 wt.% of aqueous resin or emulsion binder as binding agent, and 1 to 5 wt.% of glyoxal as binding agent hardener, and wherein color-forming concentration and color-forming temperature are freely controlled by controlling contents of the initial color-forming solution and lubricant contained in the final color-forming solution.

Description

A copying paper having color revelation property}

The present invention relates to a chromophoric copying paper in which a sound print is expressed by heat, and more particularly, by printing or applying a coloring solution on one side of the copying paper so that the color is developed by the heat of the device during copying, printing, and faxing. The present invention relates to a chromophoric copy paper that can be used to mark an owner of a copy paper with or without writing.

In general, owner labeling on copy paper is done for the company's commercial propaganda and promotional effects or to clarify the ownership of copy paper by recording the name of each department.

As the owner marking method, a company name, affiliation name, department name, etc. are printed on one side of the copy paper in advance or the user writes the owner marking content separately.

However, this method requires that the company name, organization name, and department name must be printed on the copy paper in advance, and when the user wants to use plain paper without the owner mark, the user cannot use such copy paper. In the case of separately writing the owner mark on the copy paper, it is necessary to fill in as much as necessary, so that there is a problem in that work efficiency is reduced due to a predetermined time.

The present invention has been developed in view of the above circumstances, and when used in a copying machine, a printer, and a facsimile without the need to print or write the owner mark on the copy paper in advance, a color printing liquid, which is pre-printed or applied, is expressed so that the owner mark is conveniently made. To provide a chromophoric copy paper. Another object of the present invention is to provide a chromophoric copying paper that can be used as a normal paper in normal, so that the owner-marked copying paper and the plain paper do not need to be used separately.

1 is a state of use of the chromophoric copy paper of the present invention.

Explanation of symbols on the main parts of the drawings

10: copy paper 20: music prints

30: copier

In order to achieve the above object, the chromophoric radiation paper of the present invention is a leuco dye which is a color developing agent, and one selected from tartaric acid, molar acid, lactic acid, activated clay, bisphenol A, salicylic acid and zinc salicylate as a color developing agent for developing the color developing agent. An initial coloring liquid containing one selected from calcium carbonate, cray, diatomaceous earth, silicon oxide, and zincation, a sensitizer or sensitizer for adjusting sensitivity, an antifoaming agent, and a dispersant; It is characterized in that it is formed by printing and applying the initial coloring solution, the final coloring solution containing glyoxal as a water-soluble resin or emulsion binder, binder binder as a lubricant, calcium carbonate as a lubricant.

In addition, the initial colorant is 15-25% by weight colorant, 35-45% by weight developer, 15-25% by weight lubricant, 10-20% by weight sensitizer or sensitizer, 1-10% by weight antifoaming agent and dispersant The final colorant is composed of the ratio of the initial colorant 20-30% by weight, calcium carbonate 40-55% by weight, water-soluble resin or emulsion binder 20-35% by weight, glyoxal 1-5% by weight do.

In addition, the final colorant is characterized in that the colorant concentration and colorant temperature are freely controlled by controlling the content of the initial colorant and the lubricant.

The final colorant to be printed or applied to the chromophoric copy paper of the present invention is an electron donor colorant that is usually developed by colorless or developer, an electron-soluble colorant, a lubricant that facilitates printing and application, and color temperature. An initial coloring solution containing a sensitizer or a sensitizer to adjust the sensitivity to adjust the sensitivity, an antifoaming agent and a dispersing agent to remove air bubbles, and a calcium carbonate and a binder to bind the initial coloring solution as a lubricant to adjust the sensitivity are water-soluble resins or The emulsion binder and the binder hardener include glyoxal.

The final coloring solution prepared as described above is coated on one surface of the copy paper so that the concentration of the total solids is about 20% to produce a copy paper for color development, which forms a 5-8 g / m 2 about the printed material 20.

The color developing agent of the present invention is a leuco dye of an electron donor widely used in a pressure-sensitive copy paper, a thermal paper, a thermal dye, and the like, and is usually colorless, but has a lactone ring that is colored in various colors by the use of a developer. It becomes colored or discolored by opening and closing of.

That is, as shown in FIG. 1, the principle that the phonographic printout 20 is expressed on the copy paper 10 by the copying machine 30 of the present invention is that a leuco dye and a developer present as a solid at room temperature are applied to the heat of the copying machine 30. As a result of the melt reaction, the tone print 20, which is an owner mark pre-printed or applied to the copy paper 10, is developed.

Examples of such leuco dyes include 3,3-dibutylamino-6-methyl-7-anilinofluorane (black), 3,3-diethylamino-6-methyl-7-anilinofluorane (black) , 3-cyclohexyl methylamino-6-methyl-7-anilinofluorane (black), 3,3-diethylamino-benzo (a) -fluorane (red), 3,3-diethylamino-7 -Chlorofluorane (red), 1,3-dimethyl-6-diethylamino fluorane (yellow), 3,3-diethylamino-6-methyl-7-chlorofluoran (red), 3,3- Diethylamino-7-dibenzoylamino fluorane (green), crystal violet lactone (blue) and the like.

The colorant is used to open the lactone ring of the colorant in the recording state so that the colorant is developed. Citric acid, tartaric acid, molar acid, lactic acid, activated clay, bisphenol A (BPA), salicylic acid and zinc salicylate are used. Any of water solubility may be used.

More specific examples of the developer used in the present invention include bisphenol A, bisphenol S, bisphenol F, gallic acid, salicylic acid, lactic acid, tartric acid, citric acid, valeric acid, py-hydroxy-benzyl benzoic acid, 4-hydroxy- 4'-isopropoxy diphenyl sulfone etc. are mentioned.

In addition, the lubricant is used to give uniformity, prevent adhesion, and dilute color when printing and applying the final colorant to the copy paper, and calcium carbonate, cray, diatomaceous earth, silicon oxide, and zincation are used.

In addition, the sensitizer and the sensitizer play a role of controlling the sensitivity by lowering or raising the color development temperature of the color developer according to the required temperature. In particular, the sensitizer lowers the color temperature and thus has good preservation when using the color developer alone, but lacks general sensitivity. Will be reinforced.

Benzyloxynaphthalene, parabenzyl biphenyl, etc. are used as such a sensitizer, and various amine compounds, a lubricating agent, etc. are used as a sensitizer.

At this time, more specific examples of the sensitizer include benzyl-oxy-naphthalene (BON), 1-hydroxy-2-naphthoic acid phenyl ester (HNP), pi-benzyl-bi-phenyl (PBBP), dibenzyl terephthalate (DBT), di-phenyl carbonate (ST-280), pi-nitro-methyl benzoate (PNB), benzyl-pi-nitro benzoate (BPN), etc. are mentioned.

In addition, the binder serves to improve the image stability by preventing the falling off of the recording characters due to friction after recording, and examples thereof include water-soluble resins and emulsion binders, and more preferably, various acrylic emulsion zones, fibres (PVA), starch casein synthetic cellulose, and the like are used.

The preparation method of the final coloring solution according to the present invention will be described below.

First, the raw material constituting the composition of the present invention was weighed, and then 15-25% by weight of a color developer of 30% solids, 35-45% by weight of a colorant, and 50% solids of lubricant, which were ground and dispersed to have an average particle diameter of 1-5 µm. An initial coloring solution is prepared by combining -25 wt%, 10% solids sensitizer or 10-20 wt% sensitizer, antifoaming agent and dispersant 1-10 wt%.

20-30% by weight of the initial colorant prepared in this way, 40-55% by weight of 50% water dispersion type calcium carbonate as lubricant, 20-35% by weight of 10% aqueous solution of water-soluble resin or emulsion binder as binder, and binder hardener. 1% by weight of 40% glyoxal to prepare a final colorant.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

(Unit: weight%)

Formulation Drug (Concentration) Example 1 Example 2 Example 3 Comparative Example 1 Initial color solution Colorant dispersion (30%) 20 20 20 20 Colorant Dispersion (30%) 40 40 40 40 Lubricant dispersion (50%) 20 20 20 20 Sensitizer or sensitizer dispersion (10%) 15 15 15 15 Defoamers and Dispersants 5 5 5 5 Final color solution Primary coloring solution (30%) 24 20 30 20 Calcium Carbonate (50%) 49 53 48 60 FV (10%) 24 24 20 20 Glyoxal (40%) 3 3 2 0

Table 1 shows the performance test results of copy paper for color development according to the above Examples and Comparative Examples.

division Color development Color temperature Water resistance Example 1 Standard Standard O Example 2 blur height O Example 3 depth lowness △ Comparative Example 1 blur Very high ×

O: Good △: Normal ×: Poor

In the above performance test, when Example 1 is regarded as a standard blending ratio having color development concentration and sensitivity suitable for color development, Example 2 has a low content of initial coloring solution and a large amount of calcium carbonate as a lubricant. Color sensitivity was lower than 1 and color temperature was high, resulting in low sensitivity.

In addition, in Example 3, since the content of the initial coloring solution is higher than that of Example 1, the content of the calcium carbonate as the lubricant is smaller, and the content of the fibroid as the binder and the glyoxal as the binder curing agent is smaller, the color concentration is higher than that in Example 1. The color was dark and the color temperature was low, so the sensitivity was high and the water resistance of the color image was low.

On the other hand, Comparative Example 1 compared with the above examples, the content of the initial coloring solution is enough to develop color, but the content of the calcium carbonate as a lubricant is too high the color development temperature is very low sensitivity, there is no binder curing agent, the color image Showed very low water resistance.

Embodiments having such a compounding ratio difference may be variously selected and used depending on the purpose and purpose of use.

According to the copy paper for color development of the present invention thus formed, a sound print is formed on one surface of the copy paper so that the user can use the copy paper on the copy machine, printer, and facsimile without the user having to print or fill in advance. The owner mark can be conveniently made, and can be used as a general paper in general, so there is no need to use copy paper separately so that a lot of effects can be provided.

Claims (3)

Leuco dye, which is a color developing agent, and one selected from tartaric acid, malic acid, lactic acid, activated clay, bisphenol A, salicylic acid, and zinc salicylate as a color developer to develop the colorant, and calcium carbonate, cray, diatomaceous earth, An initial coloring liquid containing one selected from silicon oxide and zincation, a sensitizer or a sensitizer for adjusting sensitivity, an antifoaming agent and a dispersant; An initial color developing solution, a calcium carbonate as a lubricant, a water-soluble resin or emulsion binder as a binder, a final color developing solution containing glyoxal as a binder curing agent is formed by printing or applying on one surface. The method of claim 1, The initial coloring solution is 15-25% by weight colorant, 35-45% by weight developer, 15-25% by weight lubricant, 10-20% by weight sensitizer or sensitizer, 1-10% by weight antifoaming agent and dispersant The final colorant is composed of the ratio of the initial colorant 20-30% by weight, calcium carbonate 40-55% by weight, water-soluble resin or emulsion binder 20-35% by weight, glyoxal 1-5% by weight Chromophoric copy paper. The method of claim 1, In the final coloring solution, the color development concentration and the color of the lubricant is characterized in that the color development concentration and color temperature freely controlled.