JPH06309652A - Multiple information recording sheet - Google Patents

Abstract

(57) [Summary] [Objective] To provide a multiple information recording sheet by which a plurality of information recordings can be obtained by one sheet by combining the magnetic recording method and the carbonless copy paper method. [Structure] A coating material for "lower paper" and "self-coloring type pressure-sensitive recording paper" for carbonless copying paper is applied on the magnetic recording layer. Alternatively, a large number of copies can be made by applying a "top paper" paint on the opposite surface of the magnetic recording layer. [Effect] The economic effect of visualization and copying of magnetic recording information can be expected.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a magnetic recording layer over a magnetic recording layer.
By applying a coating material for carbon copy paper, a plurality of information recordings can be obtained with one sheet, and a multiple information recording sheet having a magnetic recording sheet and a copying function is also provided. It is about.

[0002]

2. Description of the Related Art A magnetic recording sheet mainly composed of a ferromagnetic powder and a binder is as described in Japanese Patent Publication No. 47-28043 and U.S. Pat. No. 2,581,414. Such magnetic recording sheets can be used for parking tickets, highway pass tickets, game tickets, entrance tickets, transportation tickets, commuter tickets,
It is used for coupon tickets. No-carbon copy paper is a colorless or light-colored organic compound (hereinafter referred to as a color former) having an electron donating property, an adsorbing property, and a color-reactive property, and an acid clay, a phenol resin, an organic acid substance. Which utilizes a contact reaction of an electron-accepting organic compound (hereinafter referred to as a color developer) such as US Pat. Nos. 2,550,471 and 443.
This is as described in Japanese Patent Publication No. 6920. No
Carbon copying paper is coated on one side of a support with microcapsules containing a color-developing agent, upper paper, on lower paper with a developer, and on both sides of the support a color-developing agent and a developer are separately applied. Medium paper is mainly used, and in addition, there is a self-contained paper (self-coloring type pressure-sensitive recording paper) in which both components of the medium paper are applied to the same surface of the support. Typical combinations for obtaining a copy include upper paper-lower paper, upper paper-medium paper-lower paper, and fine paper-self-coloring type pressure-sensitive recording paper.

[0003]

Information recorded on the magnetic recording layer is usually not visually readable. In order to eliminate this inconvenience, a method of writing visible information on the opposite surface of the magnetic recording layer is generally used. However, as the amount of information increases, visible information is being written on the magnetic recording layer. On the magnetic recording layer surface, however, the color tone of the magnetic powder is dark brown or black, and even if it is attempted to obtain visible information by a method such as printing on it, it is difficult to obtain a sufficiently readable information. As an improvement to this, there is a magnetic recording layer provided with a pigment layer to have writability and printability, but of course it does not have a copying ability, so it is very inconvenient when it is necessary to copy the content. It was

[0004]

The inventors of the present invention have been able to solve these problems by applying a paint for a lower sheet containing a color developer on the magnetic recording layer to enable normal printing as visible information. ,
It was found that if the upper paper is placed on top of it, copying can be performed in the same manner as the non-carbon copying paper. Also, copying is possible by applying the coating layer component of the self-coloring type pressure-sensitive recording paper and combining it with high quality paper. Therefore, even though it is a magnetic recording sheet, it can be used in a combination similar to the case of the carbon-carbon copy paper. Further, on the opposite side of the multiple information recording layer, upper paper, lower paper, self-coloring type pressure sensitive recording paper, thermal paper,
If a coating layer such as thermal transfer paper, ink jet paper, or electrostatic recording paper was provided, it could be used according to each purpose.

As a magnetic material for obtaining the magnetic recording layer, γ
Ferrite, barium ferrite, strontium ferrite, etc. are used, but the coercive force is 1500 to 5000 so that the magnetic recording information cannot be erased by an ordinary magnet.
Oersted barium ferrite and strontium ferrite are often used.

The adhesive for obtaining the magnetic recording layer is not particularly limited, but includes oxidized starch, etherified starch, polyvinyl alcohol, methyl cellulose, casein, hydroxyethyl cellulose, polyacrylamide and carboxymethyl. Natural, semi-synthetic, synthetic water-soluble adhesives such as cellulose, gum arabic, and polyethylene oxide, and various latexes such as polyurethane-based, vinyl chloride-based, polyacrylic-based, and styrene-butadiene-based adhesives can be used. Others, defoamer, thickener, penetrant, softener,
A curing agent, a water repellent, a water resistant agent, a dispersant and the like can be used if necessary.

Acid developer, activated clay, phenol formaldehyde resin and its polyvalent metal salt, polyvalent metal salt of aromatic carboxylic acid, etc. are used as the color developer of the material for the lower paper provided on the magnetic recording layer. it can. Examples of pigments for lower paper provided on the magnetic recording layer include carbonates, oxides, hydroxides, sulfates of calcium, magnesium, aluminum, zinc, barium, titanium, etc., silica powder, clay, zeolite, and talc. In addition to such inorganic pigments, organic pigments including copolymers such as styrene resin, melamine resin, acrylic resin, and urea resin can be mentioned. In addition, the same adhesives and other additives as those used for the magnetic recording layer can be used.

Specific examples of the colorless or light-colored coloring agent of the self-coloring type pressure-sensitive recording paper material provided on the magnetic recording layer are as follows.
Crystal violet lactone, 3-indolino-3
-P-dimethylaminophenyl-6-dimethylaminophthalide, 3-diethylamino-7-chlorofluorane,
Known compounds such as 3-diethylamino-7-cyclohexylaminofluorane can be used. Examples of the encapsulation method in which these color formers are included include a coacervation method, an in situ method, an interfacial polymerization method and the like. As the buffering agent used for preventing color stains on the self-coloring type pressure-sensitive recording layer, known ones such as cellulose powder, starch particles and talc can be used. In addition, as the color developer, pigment, adhesive, and other additives, the same materials as those for the lower paper can be used. For coating the magnetic recording layer, the undercoat layer, and the self-coloring type pressure-sensitive recording layer, known coating methods such as air knife, curtain, roll, blade, rod and gravure can be used.

[0009]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.
The parts and% in the examples mean parts by weight and% by weight.

Example 1 Coating of the magnetic recording layer was performed as follows. , Water 10
After adding 2 parts of a 40% sodium polyacrylate aqueous solution (Toa Gosei Kagaku Co., Ltd., Aron T-40) to 6 parts,
Barium ferrite (manufactured by Toda Kogyo KK, MC-12)
7) 100 parts were mixed and finely ground to 4 μm with a ball mill. 40 parts of 50% styrene-butadiene copolymer latex (DL-620 manufactured by Asahi Kasei Co., Ltd.), 2%
60 parts of carboxymethyl cellulose aqueous solution (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., Serogen WSC) was sequentially added and mixed to obtain a coating liquid for the magnetic recording layer. This liquid has a basis weight of 100 g /
The coating amount on the quality paper of m ² is 30 g / m ² (dry weight solids)
So as to obtain a magnetic recording layer by coating with an air knife coater, drying after magnetic field orientation, and super calendering.

The base paper coating layer was applied by adding 40 parts of 40% Sannopco Co., Ltd. SN Dispersant 5020 as a dispersant to 35 parts of water, and adding titanium dioxide (made by Ishihara Sangyo Co., Ltd.). , Typepec CR93) was added and dispersed well. In this dispersion liquid, 40% of 3,
2-di- (α-methylbenzyl) salicylic acid zinc salt
5 parts and 210 parts of a 10% aqueous solution of oxidized starch (MS3800, manufactured by Nippon Shokuhin Kako Co., Ltd.) were added and uniformly mixed to obtain a coating liquid for lower paper. This liquid is air-knife
A multi-information recording sheet was obtained by coating the above magnetic recording layer so that the dry weight was 4 g / m ² .

Comparative Example 1 A sheet was prepared in the same manner as in Example 1 except that the magnetic recording layer was not provided on the high-quality paper of Example 1 having a basis weight of 100 g / m ² and only the lower paper coating layer was provided.

Example 2 A magnetic recording layer was obtained in the same manner as in Example 1, but a self-coloring type pressure-sensitive recording layer coated thereon was produced as follows. 3 parts of crystal violet lactone as a coloring agent, 97 parts of oil (KMC-11 manufactured by Kureha Chemical Co., Ltd.)
3) heated and dissolved in script set 520 (manufactured by Monsanto Co., styrene-maleic anhydride copolymer) together with a small amount of caseisode to prepare a 5% aqueous solution of PH4.0 100
The mixture was added little by little to the portion and emulsified. 10 parts of melamine,
Pour 25% 37% formalin and 65 parts water with Kaseiso-da.
It was set to H9 and dissolved by heating. This solution was added to the emulsion to adjust the solution temperature to 60 ° C., and stirring was continued for 30 minutes to obtain capsules for the self-coloring type pressure-sensitive recording layer. To 80 parts of this capsule solution was added 500 parts of a 20% strength wheat starch particle dispersion, and the mixture was uniformly mixed with the solution of Example 1 and dried on the magnetic recording layer with an air knife coater at a dry weight of 5 g / m 2. ^It was painted so that it would be ² .

Comparative Example 2 A sheet having only the self-coloring type pressure sensitive recording layer was prepared in the same manner as in Example 2 without providing the magnetic recording layer of Example 1.

Example 3 On the opposite side of the multiplex information recording sheet obtained in Example 1, 300 parts of the capsule solution of Example 2 and 500 parts of a 10% strength wheat starch granule dispersion and 10% of oxidation were prepared. An aqueous starch solution (200 parts) was added and uniformly mixed to obtain a coating material for paper on a no-carbon copy paper. This liquid was applied using an air knife coater so that the dry weight was 4 g / m ² .

Comparative Example 3 A coating layer similar to that of Example 3 was provided on the surface opposite to the sheet obtained in Comparative Example 1.

Example 4 On the opposite side of the multi-information recording sheet obtained in Example 2, the coating liquid for the paper on the copying paper of the nook carbon of Example 3 was air-coated.
It was applied using a knife coater so that the dry weight was 4 g / 〓.

Comparative Example 4 A coating layer similar to that of Example 3 was provided on the opposite surface of the sheet obtained in Comparative Example 2.

Comparative Example 5 A sheet having only the magnetic recording layer of Example 1 was prepared.

Evaluation of Coloring Property Color was developed by the following method, and the density was visually compared.

In Example 1 and Comparative Example 1, a commercially available Mitsubishi NCR paper on paper (blu-colored) was superposed on the provided lower paper coating layer, and printing was performed with a typewriter from above.
The color densities of both were almost the same.

In Example 2 and Comparative Example 2, when a high-quality paper was placed on the self-coloring type pressure-sensitive recording layer provided and printing was performed with a typewriter, a noticeable difference was observed in the coloring density between the two. I couldn't do it.

In Example 3 and Comparative Example 3, the sheets obtained were overlaid on a set of three sheets so as to develop color, and printing was performed from the top with a typewriter. Both the second and third sheets were printed. Almost no difference was observed in the color density of.

In Example 4, a high-quality paper is provided on the obtained sheet, below the sheet of Example 1, and in Comparative Example 4, the obtained sheet is obtained.
When the high quality paper was placed on top of the sheet and the sheet of Comparative Example 1 was placed below and printed with a typewriter from the top, the second and third sheets produced dark color 33, and the difference in color density between the two Was hardly recognized.

Therefore, the coloring performance as a no-carbon copy sheet is exhibited regardless of the presence or absence of the magnetic recording layer.

Evaluation of Magnetic Properties The output of each example was measured using a magnetic property analyzer for prepaid cards (210 BPI writing FM system) with Comparative Example 5 having only a magnetic layer as a standard. Output of Comparative Example 5 is 1
The output of each example when it is set to 00% is 96% to 99%.
And almost no decrease in output was observed.

Therefore, the magnetic output of the magnetic recording sheet was hardly affected by the presence or absence of the coating layers for "lower paper" and "self-coloring type pressure sensitive recording paper".

[0028]

The multi-information recording sheet of the present invention has a useful characteristic that it has a copying ability similar to that of a carbon copy sheet and also has the characteristics of a magnetic recording sheet. It was

Claims (3)

[Claims] 1. A magnetic recording sheet comprising a support such as paper coated on one side with a coating containing ferromagnetic powder and an adhesive as a main component.
In addition, on the magnetic recording layer, a no-carbon copy paper "bottom paper" containing a pigment, a developer and an adhesive as main components.
Multiple information recording sheet characterized by applying paint for
To. 2. A paint for self-coloring type pressure-sensitive recording paper, which comprises a color former, a developer, a pigment, a buffer and an adhesive as a main component, is applied on the magnetic recording layer. The multiple information recording sheet according to item 1. 3. The coating on the opposite surface of the magnetic recording layer for the "upper paper" of a carbon copying paper containing a color former, a buffer, a pigment and an adhesive as a main component. The multi-information recording sheet according to claim 1 or claim 2.