JPH05338350A - Thermal machine-glazed paper - Google Patents

Abstract

PURPOSE:To provide thermal machine-glazed paper capable of preventing the mutual blocking of thermal papers and also susceptible to partial treatment. CONSTITUTION:Protective ink 6 is applied to the surface or rear of a laminated paper material 5 obtained by successively laminating a thermal color forming layer 3 and an overcoat layer 4 on a paper base material to prevent adhesion (blocking). Therefore, the protective ink 6 can be applied to the required part of thermal machine-glazed paper, by a printer and the proper treatment corresponding to the use of the thermal machine-glazed paper 1 becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal roll paper used for handy terminals used outdoors such as gas, water, electricity meter reading sheets, delivery notes for foods and the like.

[0002]

2. Description of the Related Art As shown in FIG. 6, a thermal roll paper 1 is in the form of a roll having an outer diameter of 3 to 5 cm and a width of 5 to 8 cm, and is set in a device such as a handy terminal. Various information is printed as a meter reading slip for gas, water, power, a delivery note for food, etc. However, the commonly used thermal paper has a printed part that is easily discolored.For applications that require preservability, a thermosensitive coloring layer with a water-soluble overcoat layer is used. There is. As the overcoat layer, one having a water-soluble polymer such as polyvinyl alcohol as a main component is known.

[0003]

However, in the above-mentioned structure, since the overcoat layer is water-soluble, when it is used outdoors, humidity, rain, sweat, etc. have an effect and the resistance to water is insufficient. In some cases, thermal papers adhered to each other (blocking). When blocking occurs in this way, there is a problem that paper cannot be fed at the handy terminal depending on the feeding force.

On the other hand, those having a constitution in which a material containing a water resistant material is used as the overcoat layer are disclosed in JP-A-61-69489, JP-A-61-139482 and JP-A-62-62.
Various proposals have been made as disclosed in JP-A-32081 and JP-A-62-42882.

However, in such a construction, the overcoat layer is applied in the step of coating the thermosensitive coloring layer in the manufacturing process, and it can be formed only in the papermaking step, and can be used after the papermaking. The partial coating could not be done. It is an object of the present invention to provide a thermal roll paper which can prevent blocking between thermal papers and can be partially treated.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a thermosensitive coloring layer containing, on the surface of a paper substrate, an almost colorless electron-donating dye and an acidic substance that reacts with the dye to produce a color, as coloring components. , A thermal paper that is coated with an overcoat layer in order,
The thermal roll paper is characterized in that a heat-resistant and water-resistant oxidation-polymerization type or UV-curing type protection ink is applied to the front surface or the back surface thereof.

Examples of the protective ink include heat resistant ink, peeling OP varnish, varnish, and medium.

[0008]

The protective ink can be printed partially or wholly on an offset printing machine or a letterpress printing machine, and blocking can be prevented even if moisture such as rain, moisture or sweat adheres.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 5 show an embodiment of the present invention. Here, the thermal roll paper 1 includes a thermosensitive coloring layer 3 on a paper base material 2,
A protective ink 6 according to the main part of the present invention is applied and formed on the front surface or the back surface of a thermal paper 5 formed by sequentially coating an overcoat layer 4.

The thermosensitive coloring layer 3 comprises a known component containing, as a coloring component, an electron-donating dye and an acidic substance which develops a color upon contact with the dye, and is usually unemployed or light-colored when heat is applied. The electron-donating dye reacts with an acidic substance to develop a color. The overcoat layer is composed of a water-soluble polymer such as polyvinyl alcohol as a main component.

The thermal paper 5 formed by applying the thermosensitive coloring layer 3 and the overcoat layer 4 on the paper base material 2 is manufactured in the papermaking process. Then, the protective ink 6 is applied and formed on the front and back of the thermal paper 5 manufactured in the paper manufacturing process by a printing process. The protective ink 6 includes heat-resistant ink, peeling OP varnish, varnish, and medium.
When the thermal roll paper 1 is used outdoors, this protective ink 6 blocks the effects of humidity, rain, sweat, etc., and prevents the thermal roll papers 1 from adhering (blocking) to each other when they are rolled. An offset printing machine,
Printing can be done partially or entirely on a letterpress printing machine.

Here, FIG. 1 shows that the protective ink 6 is formed on both sides of the upper surface of the overcoat layer 4 of the thermal paper 5. That is, the influence of humidity, rain, sweat, etc. will cause wetting from both side edges and cause mutual blocking of the thermal paper 5. Therefore, protective inks 6 and 6 are formed on both ends of the surface of the heat-sensitive paper 5 to prevent the moisture from entering.

FIG. 2 shows the back surface of the thermal paper 5, which is formed at both ends in the same manner as the above-mentioned structure. In this case,
Since it is formed on the lower surface of the paper base material 2, there is an advantage that the thermosensitive coloring layer 3 is not affected and proper printing can be guaranteed. Moreover, since the protective ink 6 prevents the thermal roll papers 1 from adhering to each other, the desired effect can be obtained even when formed on the back surface of the thermal roll paper 1.

In FIG. 3, the protective ink 6 is formed only on the printing portion of the thermal paper 5. In this case, when the printed portion 7 is a part of the surface of the thermal roll paper 1, the thermal roll paper 1,
1 Even if they are adhered to each other, the printed part is not damaged.

FIGS. 4 and 5 show the front and back surfaces of the thermal paper 5, which are coated and formed on the entire surfaces thereof. In this case, adhesion (blocking) can be reliably prevented on the entire surface of the thermal roll paper 1.

[0016]

As described above, according to the present invention, the protective ink 6 is formed on the front surface or the back surface of the thermal paper 5 which is obtained by sequentially coating the thermal color forming layer 3 and the overcoat layer 4 on the paper base material 2. hand,
It prevents adhesion (blocking). Therefore, the protective ink 6 can be formed on a required portion of the thermal roll paper 1 by a printing machine, and an appropriate treatment corresponding to the application of the thermal roll paper 1 is possible. It has an excellent effect such as

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a first application example of a protective ink 6.

FIG. 2 is a vertical sectional side view showing a second application example of protective ink 6.

FIG. 3 is a vertical cross-sectional side view showing a third application example of protective ink 6.

FIG. 4 is a vertical cross-sectional side view showing a fourth application example of protective ink 6.

FIG. 5 is a vertical cross-sectional side view showing a fifth application example of the protective ink 6.

FIG. 6 is a perspective view of the thermal roll paper 1.

[Explanation of symbols]

 1 Thermal roll paper 2 Paper base material 3 Thermosensitive coloring layer 4 Overcoat layer 6 Protective ink

Claims (1)

[Claims] 1. A thermosensitive coloring layer containing a substantially colorless electron-donating dye and an acidic substance that develops a color upon contact with the dye as a coloring component, and an overcoat layer in this order. Heat resistance on the front or back surface of the thermal paper manufactured,
A thermal roll paper characterized by being coated with a water-resistant oxidation-polymerizable or UV-curable protective ink.