JPH06286310A - Thermal recording material for tape printer - Google Patents

Abstract

PURPOSE:To provide a means for increasing the winding length of the tape- shaped recording material received in a tape printer or miniaturizing a cassette or the printer. CONSTITUTION:The tape-shaped recording thermal recording material used in a tape printer loaded with a thermal head is constituted by providing a thermal color forming layer on the single surface of a base material 1 and laminating a release material on the other surface thereof through a pressure- sensitive adhesive layer 3.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a thermal recording material for a tape printer.

[0002]

2. Description of the Related Art A tape printer has a built-in simple word processor function and printer function, and forms an image by rewinding a tape-shaped recording material wound in a pancake shape, It is one type of a small-sized word processor which is configured to cut out a portion where an image is formed and attach the cut piece to an object, which is easy to carry. According to this tape printer, it is possible to easily create a headline label, a label with a name, a bar code label and the like.

A thermal head is usually used in the printer section of the tape printer because it can be easily miniaturized, and a thermal transfer ink ribbon is used to form an image on the tape-shaped recording material.

As the tape-shaped recording material used in combination with the thermal transfer ink ribbon, an image receiving layer made of a polyester resin or the like having a good fixing property of the thermal transfer ink is provided on one surface of a base film such as a polyester film, and the other surface is provided with an image sensing layer. It is known that a release material is laminated via a pressure-adhesive layer. In this product, a thermal transfer ink is transferred to the image receiving layer to form a printed image, the portion is cut off, and then the release material is peeled off.
The pressure-sensitive adhesive layer side is to be attached to an object.

However, in the tape printer, the roll of the tape-shaped recording material as well as the roll of the thermal transfer ink ribbon must be accommodated in the tape printer, so that the space for accommodating the recording material becomes narrower. As a result, the length of the recording material that can be stored in the tape printer (hereinafter referred to as the winding length) becomes shorter.
The disadvantage of having to replenish the recording material frequently,
Alternatively, if the winding length is constant, the size of the printer becomes large. In the tape printer, the tape-shaped recording material roll and the thermal transfer ink ribbon roll are usually housed in a cassette and loaded in the printer. This complicates the structure of the cassette, the printer, and the drive mechanism. In addition, the thermal transfer ink ribbon is much thinner than the tape-shaped recording material, and if it does not run properly, problems such as print wrinkles and winding defects may occur. Considerable dimensional accuracy is required.

The conventional tape printer will be described with reference to the drawings.

FIG. 8 is an explanatory view showing a conventional tape printer. In FIG. 8, 30 is a tape-shaped recording material, 31
Is the roll, 32 is the thermal transfer ink ribbon, and 33 is the roll. The winding body 31, the winding body 33, and the winding core 34 of the thermal transfer ink ribbon are housed in a cassette 35,
Installed in the printer. The tape-shaped recording material 30 is fed together with the thermal transfer ink ribbon 32 by the rotation of the drive roller 36, and after transfer printing is performed by heating by the thermal head 37, the tape-shaped recording material 30 is sent out of the printer to transfer the thermal transfer ink. Only the ribbon 32 is wound by the rotation of the winding shaft 38 that engages with the winding core 34.

As shown in FIG. 8, in the case of the cassette 35 used in the conventional tape printer, the tape-shaped recording material 3 is used.
The ratio of the space other than the accommodation space of 0 is very large. Further, the normal drive roller 36 is given a required torque and a required rotation speed by a stepping motor, and at the same time, the winding shaft 38 is also driven by the stepping motor. Therefore, the stepping motor is driven by the drive roller 36,
A capacity sufficient to support both loads of the winding shaft 38 is required.

As described above, in the conventional tape printer, since the thermal transfer ink ribbon must be used, the winding length of the tape-shaped recording material is shortened or the size of the cassette or the printer is increased, and the cassette, The structure of the printer becomes complicated.

In view of the above points, the present invention provides means for increasing the winding length of the tape-shaped recording material accommodated in the tape printer or for downsizing the cassette and the printer. With the goal.

[0011]

The present invention is a tape-shaped thermosensitive recording material for use in a tape printer having a thermal head, wherein a thermosensitive coloring layer is provided on one side of a base material, and a pressure-sensitive coloring layer is provided on the other side. Provided is a heat-sensitive recording material for a tape printer, which comprises a release material laminated via an adhesive layer.

[0012]

According to the present invention, a tape-shaped recording material which can form a printed image by directly receiving a heat from a thermal head to form an image is used as a tape-shaped recording material in a tape printer.

Therefore, unlike the conventional tape printer, it is not necessary to store the thermal transfer ink ribbon together with the recording material, and the storage space for the recording material can be increased accordingly, and the winding length of the recording material can be increased accordingly. Alternatively, if the winding length is constant, the cassette and the printer can be downsized. Further, since the thermal transfer ink ribbon is not used, the structure of the cassette, the printer, and the driving mechanism are simplified, and the dimensional accuracy is not so required, which is advantageous in terms of cost.

This will be described with reference to the drawings. Figure 5
FIG. 3 is an explanatory view showing an example of a tape printer using the tape-shaped thermosensitive recording material of the present invention. In the drawings, 10 is a tape-shaped heat-sensitive recording material of the present invention, and 20 is a roll thereof. The roll 20 is accommodated in the cassette 21 and mounted in the printer. The tape-shaped thermosensitive recording material 10 has a driving roller 3
It is fed by the rotation of 6, and is printed out by the heating by the thermal head 37 and then sent out of the printer.

As is apparent from FIG. 5, since the tape printer using the tape-shaped thermosensitive recording material of the present invention does not use the thermal transfer ink ribbon, the space required for the cassette can be remarkably reduced as compared with the conventional example. .

Further, as in the conventional example, the winding shaft 38 for winding the thermal transfer ink ribbon after transfer printing is unnecessary, and therefore,
The cassette and the printer itself can be downsized. Further, since there is no load on the winding shaft 38, the drive mechanism is simplified and the capacity of the drive stepping motor is small, so that a small stepping motor can be used. Further, running of the thermal recording material does not require so strict dimensional accuracy.

Next, the present invention will be specifically described.

The heat-sensitive recording material for tape printers of the present invention is a tape-like heat-sensitive recording material in which a heat-sensitive coloring layer is provided on one surface of a substrate and a release material is laminated on the other surface via a pressure-sensitive adhesive layer. is there.

As the constitution of the thermosensitive coloring layer, those which have been conventionally used in thermosensitive recording materials such as thermosensitive paper can be used without particular limitation.

For example, a single-layer thermosensitive color developing layer having a structure in which a color-developing substance and a color developer are dispersed in a resin binder (a thermosensitive recording material having a thermosensitive color developing layer of this type is referred to as a heat-sensitive recording material of Embodiment A below). Recording material).

FIG. 1 is a partial sectional view showing an embodiment of the heat-sensitive recording material of the embodiment A. In FIG. 1, reference numeral 1 denotes a base material, one side of the base material 1 is provided with a thermosensitive coloring layer 2 in which a color-developing substance and a color developer are dispersed in a binder, and the other side is provided with a pressure-sensitive adhesive layer 3. The release material 4 is laminated via the above.

As the combination of the color-forming substance and the color-developing agent, those conventionally known can be used without particular limitation.

For example, a combination of a colorless dye precursor and an electron-accepting substance that develops a color when the precursor is brought into contact can be used.
Examples of the dye precursor include lactone-based, lactam-based, sultone-based, phenothiazine-based, and spiropyran-based substantially colorless dye precursors. Examples of the electron-accepting substance include phenolic compounds,
Examples thereof include thiophenol compounds, thiourea derivatives, organic acids and metal salts thereof. Specific examples of the dye precursor and the electron-accepting substance include JP-A-49-291.
The materials described in JP-A-43-43, JP-A-51-116915, JP-A-2-165989, etc. can be used.

Another example of the combination of the color forming substance and the color developer is a combination of a silver salt of a long chain fatty acid and a reducing agent described in US Pat. No. 2,910,377. To be Examples of the long-chain fatty acid silver include silver behenate, and examples of the reducing agent include protocatechuic acid,
4-methoxy-1-naphthol and the like can be mentioned.

The use ratio of the color forming substance and the color developing agent may be near the reaction equivalent.

As the binder used for supporting the color-forming substance and the color developer on the substrate, for example, polyvinyl alcohol, starch and its derivatives, cellulose such as hydroxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose, ethyl cellulose and the like. Derivatives, polyacrylic acid alkali salt, polyvinylpyrrolidone, acrylamide-acrylic acid ester copolymer, acrylamide-acrylic acid ester-methacrylic acid terpolymer, styrene-maleic anhydride copolymer alkaline salt, isobutylene-maleic anhydride Water-soluble polymers such as copolymer alkali salt, polyacrylamide, alkali alginate, gelatin, and casein, polyvinyl acetate, polyvinyl butyral,
Examples thereof include polyurethanes, polyacrylic acid esters, polymethacrylic acid esters, vinyl chloride-vinyl acetate copolymers, ethylene-vinyl acetate copolymers, styrene-butadiene copolymers, styrene-butadiene-acrylic copolymers. These binders are aqueous solutions, aqueous dispersions,
It can be used in the form of an organic solvent dispersion or an organic solvent solution.

Along with the color-forming substance and the color-developing agent, if necessary, various compounding agents used in this type of heat-sensitive recording material, such as fillers, surfactants, and heat-fusible substances (color is developed in a heat-melted state). A substance that functions as a solvent that dissolves a volatile substance, a color developer, a binder), and an oily substance can be used together.

The thermosensitive coloring layer is usually prepared by adding a color-developing substance and a color-developing agent and, if necessary, other compounding agents to a solution in which the binder is dissolved or dispersed, and coating the coating solution uniformly dispersed on a substrate. It can be formed by drying. The thermosensitive coloring layer thus obtained is usually a substantially white and opaque layer. The solvent used for the coating liquid is one that does not dissolve the color-forming substance and the color developer.

The thermosensitive coloring layer may be colored in a light ground color with a coloring pigment or dye.

The coating amount of the thermosensitive coloring layer (coating amount after drying, the same applies hereinafter) is appropriately about 1 to 6 g / m ² .

In Embodiment A, as shown in FIG. 2, a transparent protective layer 5 may be provided on the thermosensitive coloring layer 2.

The transparent protective layer prevents a phenomenon (stick phenomenon) in which the thermal head is fused to the thermosensitive coloring layer during printing and hinders the feeding of the recording material, or the thermal head is contaminated by contact with the thermosensitive coloring layer. It is provided for the purpose of preventing the above or improving the preservability of the recording material before and after printing.

The transparent protective layer may be a resin coating layer, or a plastic film may be laminated with an adhesive.

As the resin for the coating layer as the transparent protective layer, the same resin as the binder resin used for the thermosensitive coloring layer can be used, and those exemplified as the water-soluble polymer are particularly preferable. Furthermore, organic solvent-soluble resins such as nitrocellulose-based resins, polyurethane-based resins, polyester-based resins, polyacrylic-based resins, and polyvinyl chloride-based resins can be used.

When the above water-soluble polymer is used, a water-proofing agent may be used in combination, and examples of such a water-proofing agent include formaldehyde, glyoxal, chrome alum,
Melamine, melamine-formaldehyde resin, polyamide resin, polyamide-epichlorohydrin resin, etc. can be used.

The coating layer contains a silicone-based release agent, a fluorine-based release agent, other slippery substances, or an ultraviolet absorber in order to improve the sticking-preventing effect as long as the transparency is not impaired. May be.

When a water-soluble polymer or an aqueous emulsion is used as the resin for the coating layer, it is applied as an aqueous liquid. When coating as an organic solvent solution or dispersion, it is preferable to use an organic solvent which does not dissolve the components of the thermosensitive color developing layer.

The coating amount of the coating layer is 1 to 50 g / m.
² , especially about 4 to 25 g / m ² . If the coating amount is less than the above range, the desired effect is difficult to be obtained, and if the coating amount is more than the above range, the thermal sensitivity during recording is lowered.

Examples of the plastic film for lamination include polypropylene film, polyester film, polycarbonate film, polyimide film, polymethylpentene film and the like. From the viewpoint of transparency and heat resistance, polyester film and polymethylpentene film are preferable. The thickness of the film is generally 1 to 100 μm, especially about 4 to 25 μm. If the thickness of the film is smaller than the above range, it is difficult to obtain the desired effect, and if it is large, the thermal sensitivity at the time of recording is lowered.

The plastic film is laminated on the thermosensitive coloring layer by using an appropriate adhesive.

In Embodiment A, as shown in FIG. 3, a concealing layer 6 may be provided between the substrate 1 and the thermosensitive coloring layer 2.

The hiding layer 6 is provided for the purpose of obtaining clear color printing without being affected by the color of the base when a material such as a plastic film having no hiding property or a poor hiding property is used for the substrate 1. The color of the hiding layer is usually white, but may be chromatic.

The hiding layer is a layer in which a pigment is dispersed in a resin binder. As the pigment, white pigments such as titanium oxide and calcium carbonate and various chromatic pigments can be used. As the resin binder, those exemplified as the resin binder of the thermosensitive coloring layer and the transparent protective layer can be used.

The coating amount of the hiding layer may be appropriately determined in consideration of the hiding property, but it is usually about 1 to 5 g / m ² .

In the embodiment A, both the transparent protective layer 5 and the hiding layer 6 may be provided.

The thermosensitive coloring layer in the present invention may have a constitution in which a color-forming substance and a color developer are contained in separate layers (thermosensitive recording materials having this type of thermosensitive coloring layer are described below. The heat-sensitive recording material of B).

In the embodiment B, since the color-forming substance and the color-developing agent are present in different layers, fog and the like are prevented and the storage stability is good. Further, since the color-forming substance and the color developer can be contained in the respective layers at high concentrations, high-density color-developed printing can be obtained.

FIG. 4 is a partial sectional view showing an embodiment of the heat-sensitive recording material of the embodiment B.

In FIG. 4, the thermosensitive coloring layer comprises a first layer 2a and a second layer 2b provided thereon, one of which contains a coloring substance and the other contains a developer. It

Usually, from the viewpoints of storage stability and thermosensitive coloring, the first layer 2a contains a color-forming substance and the second layer 2b contains a color developer.

The thermosensitive coloring layer in the embodiment B includes a substantially opaque layer (hereinafter referred to as embodiment BI) and a substantially transparent layer (hereinafter referred to as embodiment BII).

Explaining the thermosensitive color developing layer of Embodiment BI, the first layer 2a is a layer in which a color forming substance is dispersed in a binder, and the second layer 2b is a layer in which a color developing agent is dispersed in a binder. It is a layer of states (and vice versa). Both layers are substantially opaque.

As the color-forming substance, the color developer, the binder and other additives in the embodiment BI, those exemplified for the heat-sensitive color forming layer 2 in the embodiment A can be used. There is no particular difference from the thermosensitive coloring layer 2, except that the first layer 2a containing a color-forming substance is formed on the base material 1 and the second layer 2b containing a color-developing agent is formed thereon. .

When the thermosensitive color developing layer of embodiment BI is used, a transparent protective layer 5 and / or a hiding layer 6 may be provided.

Next, the thermosensitive color developing layer of Embodiment BII will be explained. The first layer 2a is a layer in which a color forming substance is dissolved in a binder, and the second layer 2b is a color developing agent dissolved in a binder. It is a layer in the state where it was broken (there is also the opposite case). Both layers are substantially transparent layers.

A coating solution prepared by dissolving a color-forming substance and a binder and, if necessary, a heat-fusible substance in an organic solvent is applied onto the substrate 1 and dried to form a transparent first layer 2a. A developer and a binder, and an antifoggant, if necessary, in an organic solvent (a solvent that does not dissolve the binder of the first layer 2a is used) is applied to the first layer 2a and dried. To form the second layer 2b.

As the color-forming substance and the color-developing agent, those exemplified for the heat-sensitive color-developing layer of the embodiment A can be used.

As the binder, those which are soluble in an organic solvent can be used among those exemplified as the binder for the heat-sensitive color forming layer and the transparent protective layer in the embodiment A.

As the binder for the first layer 2a, vinyl chloride-vinyl acetate copolymer, acrylonitrile-vinylidene chloride copolymer, acrylonitrile-styrene copolymer, polyvinyl butyral, etc. are preferable, and these are used alone or in combination. Used. As the binder of the second layer 2b, polyvinyl butyral, polyvinyl pyrrolidone, etc. are preferably used.

Examples of the heat-fusible substance include acetanilide, phthalic anhydride, tetrachlorophthalic anhydride, succinic anhydride and the like, and metals such as aluminum stearate, lead stearate and magnesium palmitate. The series consisting of soap is useful, and these can be used for each series,
Both series may be used together. These heat-fusible substances are 1 to the solid content of the first layer 2a containing the color-forming substance.
About 20% (weight%, the same applies below) is used. If it is less than 1%, there is no added effect, and if it exceeds 20%, crystals are precipitated and the first layer 2a becomes opaque, which is not preferable.

As the antifoggant, an organic amine compound or its derivative is used. Hydrochlorides of aromatic and aliphatic amines are particularly effective. For example, amylamine hydrochloride, dodecylamine hydrochloride, ethylenediamine hydrochloride, aniline hydrochloride and the like. Besides these, pyridine, morpholine, β-naphthylamine and the like are also useful. These antifoggants are used by adding 2 to 10% to the solid content of the second layer 2b containing the color developer. If it is less than 2%, the effect of preventing fog is weak, and if it exceeds 10%, the amine compound is easily oxidized, and the recording material is contaminated.

In addition, the first layer 2a and the second layer 2b are appropriately blended with additives such as fillers and surfactants exemplified for the heat-sensitive color forming layer of the embodiment A within a range not impairing transparency. Good.

When the thermosensitive color developing layer of embodiment BII is used, a transparent protective layer 5 and / or a hiding layer 6 may be provided. If a transparent recording material is desired, the hiding layer 6 is not provided.

As the base material 1, polyester films such as polyethylene terephthalate film and polyethylene naphthalate film are preferably used from the viewpoint of strength. In addition, a polyvinyl chloride film, a polycarbonate film, a triacetyl cellulose film, a polyamide film, a polyimide film, an aramid film, etc. can be used. More glassine paper,
Capacitor paper, fine paper, kraft paper, elephant paper, copy paper, Indian paper, synthetic paper, etc. can also be used. The thickness of the base material is preferably about 20 to 150 μm from the viewpoint of the winding length and handleability at the time of sticking to an object.

To obtain a transparent recording material, the transparent thermosensitive coloring layer of Embodiment BII is used, and an uncolored or colored transparent plastic film is used as a substrate.

As the plastic film, a transparent or opaque colored film may be used depending on the use of the recording material. The hiding power can be improved by using an opaquely colored plastic film. As the paper, it is possible to use paper colored in various colors.

On the back surface of the base material 1 (the surface opposite to the surface on which the thermosensitive coloring layer is provided), the release material 4 is laminated via the pressure sensitive adhesive layer 3.

As the pressure sensitive adhesive (pressure sensitive adhesive) for the pressure sensitive adhesive layer 3, various pressure sensitive adhesives conventionally used can be appropriately used. Specific examples of the pressure-sensitive adhesive include acrylic resins (alkyl acrylate resin, alkyl acrylate resin-acrylic acid copolymer, etc.), polyvinyl acetate, vinyl acetate-
Ethylene copolymers, vinyl acetate-maleic acid ester copolymers, vinyl acetate-acrylic acid ester copolymers, ethylene-acrylic acid copolymers, epoxy resins, solvent types containing epoxy resin as a main component, emulsion type, etc. Pressure sensitive adhesives.

The coating amount of the pressure sensitive adhesive layer is 0.5 to 5 g / m ^2.
The degree is appropriate.

As the release material 4, various conventionally known release materials can be used. For example, glassine paper, parchment paper, high-quality paper, kraft paper or the like having a release agent layer such as silicone formed on the surface of the paper, the surface of the paper is subjected to a clay coat, and then a release agent layer What was formed, a coating layer of an aqueous resin (for example, polyvinyl alcohol, starch, carboxymethyl cellulose, etc.) was formed on the surface of the paper, and a release agent layer was formed on it, and an olefin resin was laminated on the surface of the paper. In addition, those having a release agent layer formed thereon, those having a release agent layer formed on the surface of a plastic film (for example, polyester film, polypropylene film, etc.) are appropriately used. The release material 4 may be either a double-sided release treatment or a single-sided release treatment. From the standpoint of blocking prevention, it is preferable that both surfaces have been subjected to a release treatment. (The phenomenon in which the wound recording material slips out of the core because there is too much slippage between and)
From the viewpoint of preventing the above, one-side release treatment is preferable.

Particularly preferable mold releasing materials are the following two kinds of mold releasing materials.

(A) Density of 1.0 g / as the base material of the release material
Those using papers of ³ cm ³ or less (hereinafter referred to as a release material A).

(B) A material using a polyester film or a polyolefin film as the base material of the release material.

By using the above-mentioned preferable release material, it is possible to prevent the release material from floating in the recording material.

When the recording material is stored under conditions of high temperature and high humidity, a phenomenon may occur in which the release material partially lifts from the recording material main body. This floating is likely to occur when a glassine paper having a release agent layer made of a silicone resin provided on one surface is used as a release material.
When a recording material having such a floating is used in a tape printer, there are problems such as running failure of the recording material and, in extreme cases, the printed recording material does not come out of the tape printer. These phenomena will be described with reference to the drawings.

FIG. 6 is an explanatory view showing the floating caused on the recording material. The mold release material 4 is partially lifted from the main body 11 of the recording material 10 to form a float 12. In some cases, the height of the float 12 (the height H from the general surface of the release material, the same applies below) reaches 1 to 2 mm. Such floating may occur in the length direction of the tape-shaped recording material in an amount of 10 or more per 1 m.

FIG. 7 is an explanatory view showing the running state of the recording material in the tape printer. The recording material 10 wound in a pancake shape is rewound and supplied between the driving roller 36 and the thermal head 37, and after color printing, the recording material 10 exits from the outlet 23 provided in the case 22 of the tape printer. It is like this.

However, if the float 12 is terrible, it will be caught in the outlet 23 and will not come out to the outside.

Even if the floating 12 generated during storage is not so bad as described above, the following problems occur when printing is performed in a low temperature environment. As shown in FIG. 7, since the recording material 10 is moved by the rotation of the drive roller 36, a considerable pressure is applied by the rotation of the drive roller 36.

Therefore, there is a possibility that a slight float is moved and merges with other floats to become a big float. This is because the peel strength of the recording material is set to a low level (for example, about 5 g / 20 mm) so that the release material can be easily peeled off. It is presumed that it will be moved and merge with other floats to become a big float.

Such a phenomenon may be prevented by increasing the peel strength setting value or by increasing the rigidity of the release material so that the float does not move. It is not preferable to raise it because it makes the peeling operation of the release material difficult. If the thickness of the glassine paper is increased to increase the rigidity of the release material, the winding length of the recording material becomes short, which is not preferable.

By using the above-mentioned preferable release material, it is possible to obtain a recording material in which the release material does not float even when stored in a high temperature and high humidity environment or printed in a low temperature environment.

The release material A has a density of 1.0 as a base material.
It uses paper of g / cm ³ or less.

As described above, the recording material using the release material having a paper of low density as the base material does not cause the release material to float even when stored under high temperature and high humidity conditions. It is presumed that the reason is that the paper having a low density is not densely packed with the fibers as described above, and therefore absorbs elongation due to moisture absorption by itself. Glassine paper has a density of 1.1 to 1.2 g / cm ^3.
It is presumed that due to its high density, it cannot absorb the elongation by itself, which causes floating.

Further, since a small float does not occur, even when printing is performed in a low temperature environment, there is no problem that a small float moves and coalesces with other floats to cause a large float as in the conventional example.

Since the base material of the release material B is a polyester film or a polyolefin film, no floating occurs at all.

The base material of the release material A has a density of 1.0 g /
Although cm ³ or less of the paper is used, not out hips the density is too low, because poor workability upon the release of the release material from the recording material body, the density is 0.7 g / cm ³ or higher preferable. The types of paper include high-quality paper, kraft paper, elephant paper, copy paper, and Indian paper, and synthetic paper can also be used. The thickness of the base material is preferably in the range of 40 to 90 μm. When the thickness of the base material is larger than the above range, the winding length is short, and when the thickness is smaller than the above range, the workability is not good and the peeling workability is deteriorated.

The release agent A is not particularly limited in its constitution except that the above-mentioned specific paper is used as a substrate, but a polyolefin resin, polystyrene resin, polyester resin, polyurethane is formed on the surface of the paper substrate. A structure in which a laminate layer made of at least one resin selected from the group consisting of resin series is provided, and a release agent layer is provided on the laminate layer (hereinafter referred to as the first embodiment) is particularly preferably used. .

In the release material of the first embodiment, the presence of the resin laminate layer suppresses the expansion of the paper base material, so that the occurrence of floating is more completely prevented.

As the polyolefin resin for the laminate layer, polyethylene resin, polypropylene resin, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer,
Examples thereof include ethylene-acrylic acid copolymers and ethylene-vinyl alcohol copolymers. The thickness of the resin laminate layer is preferably in the range of 5 to 25 μm. When the thickness of the laminating layer is less than the above range, it is difficult to sufficiently suppress the elongation of the paper substrate, while when it exceeds the above range, the winding length of the recording material becomes short, which is not preferable. As a laminating method, any known method can be adopted, but an extrusion laminating method is usually adopted.

The release agent for the release agent layer is not particularly limited,
Although any of silicone resin type, olefin resin type, long chain alkyl group-containing polymer type, fluororesin type and the like can be used, usually silicone resin type is preferably used. The thickness of the release agent layer is usually about 0.1 to 2 μm.

Further, as the release material A, one having a constitution in which a resin coat layer is provided on the surface of the paper base material and a release agent layer is provided on the resin coat layer (hereinafter referred to as the second embodiment) is also suitable. Used for.

Also in the second embodiment, the presence of the resin coating layer suppresses the elongation of the paper base material.

As the resin for the resin coat layer, any resin that is non-hygroscopic or does not extend even when it absorbs moisture can be used without particular limitation. For example, polyacrylic acid alkyl ester, polymethacrylic acid alkyl ester, polyacrylamide, polystyrene. , Polyvinyl butyral, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyurethane, polyester, carboxymethyl cellulose, urea resin, melamine resin and the like are used alone or in combination. The thickness of the resin coat layer is 0.5-
25 μm is suitable. If the thickness of the resin coat layer is less than the above range, the elongation of the paper substrate cannot be sufficiently suppressed, and if it exceeds the above range, the winding length of the recording material becomes short, which is not preferable.

As the release agent layer in the second embodiment, the same one as in the first embodiment can be used.

Next, the release material B uses a polyester film or a polyolefin film as a base material.

Examples of the polyester film include polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate films, and examples of the polyolefin film include polyethylene and polypropylene films. These may be unstretched films or uniaxially or biaxially stretched films. A suitable thickness of the film base material is about 15 to 100 μm. When the thickness of the film substrate is less than the above range, the peeling workability is deteriorated, while when it exceeds the above range, the winding length becomes short, which is not preferable.

In the release material B, a release agent layer is directly formed on one surface of the film base material. As the release agent layer, the same one as the release material A is used.

In both of the release materials A and B, the thickness of the release material is preferably 50 to 100 μm from the viewpoint of increasing the winding length and improving the peeling workability. Further, the peeling strength of the release material from the recording material main body is 2 to 10 g / 20 mm (peeling speed of 0.
15 m / min) is preferable.

Hereinafter, the present invention will be described in more detail with reference to examples. The parts and% shown below are parts by weight and% by weight, respectively. The coating amount is the coating amount after drying.

Example 1 A mixture [A] to [D] was prepared by mixing and dispersing the mixture having the following formulation with a sand grinder for 2 to 4 hours.

Liquid [A] 3,3-bis (p-dimethylaminophenyl) -6-dimethylaminophthalide 20.0 parts Polyvinyl alcohol 10% aqueous solution 30.0 parts Water 50.0 parts [B] liquid p- Isopropyl hydroxybenzoate 90.0 parts Calcium carbonate 90.0 parts Polyvinyl alcohol 10% aqueous solution 200.0 parts Water 400.0 parts [C] liquid calcium carbonate 20.0 parts Methylcellulose 5% aqueous solution 20.0 parts Water 60.0 Parts [D] Liquid Hydroxymethyl cellulose 20.0 parts Silica 1.6 parts Polyamide epichlorohydrin resin 12.5% aqueous solution 6.5 parts Water 15.0 parts Mixing and stirring the mixture of the following formulations with an agitator and coating for a thermosensitive coloring layer A liquid and a coating liquid for a transparent protective layer were prepared.

[Coating liquid for thermosensitive coloring layer] [A] liquid 40.0 parts [B] liquid 320.0 parts Water 60.0 parts [Transparent protective layer coating liquid] [D] liquid 45.0 parts [C] Liquid 0.7 parts Water 11.3 parts The above-mentioned thermosensitive coloring layer coating liquid was applied onto one side of a transparent polyethylene terephthalate film having a thickness of 38 μm so that the coating amount was 5.5 g / m ^2. Then, it is dried to form a white opaque thermosensitive coloring layer, and a protective layer coating solution is applied thereon so that the coating amount is 3.5 g / m ² , followed by drying to form a transparent protective layer. The surface of the layer was calendered.
Then, on the back surface of the film substrate, an acrylic ester copolymer emulsion as a pressure sensitive adhesive was applied at a coating amount of 4 g.
/ M ² and so as applied to give a heat-sensitive recording material body to form a pressure-sensitive adhesive layer and dried.

A silicone resin-based release agent layer having a thickness of 0.5 μm was formed on one side of a release material (glassine paper having a thickness of 65 μm (density: 1.15 g / cm ³ )) on the pressure-sensitive adhesive layer side of the main body. No. 1) was laminated to obtain a heat-sensitive recording material.

This heat-sensitive recording material was slit around a width of 18 mm and wound on a core to obtain a pancake-shaped roll of tape-shaped heat-sensitive recording material.

When this tape-shaped heat-sensitive recording material was mounted on the tape printer shown in FIG. 5 and printing was carried out, a label was obtained even if it had a clear blue color printing. The release material was peeled off from this label and attached to a plastic plate. The peeling work and the sticking work of the release material were good.

Example 2 On one side of a transparent polyethylene terephthalate film having a thickness of 50 μm, a coating solution having the following formulation was applied at a coating amount of 2 g / m 2.
^It was applied so as to have a thickness of ² and dried to form a colorless and transparent first layer.

3,3-Bis (p-dimethylaminophenyl) -6-dimethylaminophthalide 3 parts Phthalic anhydride 1 part Vinyl chloride-vinyl acetate copolymer 3 parts Methyl ethyl ketone 93 parts Then on the first layer The following formulation was applied so that the coating amount would be 2 g / m ² and dried to give a colorless and transparent second coating.
Layers were formed.

Gallic acid 8 parts Polyvinyl butyral 10 parts Aniline hydrochloride 1 part Methanol 81 parts Then, a pressure-sensitive adhesive layer having a coating amount of 4 g / m ² was formed on the back surface of the film substrate in the same manner as in Example 1 to obtain heat sensitivity. I got the recording material body.

On the pressure-sensitive adhesive layer side of this main body, a release material (thickness 6
On one side of 0 μm high-quality paper (density 0.85 g / cm ³ ), polyethylene was extruded and laminated to a thickness of 15 μm, and a 0.5 μm-thick silicone resin-based release agent layer was formed on it. I got a thermal recording material.

This heat-sensitive recording material was slit around a width of 18 mm and wound on a core to obtain a pancake-shaped roll of tape-shaped heat-sensitive recording material.

When this tape-shaped heat-sensitive recording material was mounted on the tape printer shown in FIG. 5 and printing was carried out, a label having a clear blue color print was obtained. The release material was peeled off from this label and attached to a plastic plate. The peeling work and the sticking work of the release material were good.

When the wound body was left in an atmosphere of 60 ° C. and 90 RH for 96 hours and then rewound to examine the occurrence of floating, the occurrence of floating was not observed at all.

Example 3 On one side of a transparent polyethylene terephthalate film having a thickness of 50 μm, a coating solution having the following formulation was applied in an amount of 2 g / m 2.
^It was applied so as to have a thickness of ² and dried to form a colorless and transparent first layer.

Silver behenate 50 parts Vinyl chloride-vinyl acetate copolymer 40 parts Tetrachlorophthalic anhydride 10 parts Methyl ethyl ketone 80 parts Toluene 20 parts Then, a coating solution of the following formulation is applied on the first layer. The second layer, which was colorless and transparent, was formed by coating and drying so that the coating amount was 1.8 g / m ² .

Protocatechuic acid 20 parts Vinyl chloride-vinyl acetate copolymer 70 parts Methyl ethyl ketone 80 parts Toluene 20 parts Then, on the back surface of the film base material in the same manner as in Example 1, a pressure-sensitive adhesive layer having a coating amount of 4 g / m ^{2 was} applied. To form a heat-sensitive recording material body.

On the pressure-sensitive adhesive layer side of this main body, a release material (thickness 5
A thermosensitive recording material was obtained by laminating a 0.5 μm thick silicone resin-based release agent layer on one surface of a 0 μm biaxially oriented polypropylene film).

The thermosensitive recording material was wound on a core while slitting a width of 18 mm to obtain a pancake-shaped roll of tape-shaped thermosensitive recording material.

When this tape-shaped heat-sensitive recording material was mounted on the tape printer shown in FIG. 5 and printing was carried out, a label having a clear black color development print was obtained. The release material was peeled off from this label and attached to a plastic plate. The peeling work and the sticking work of the release material were good.

When the wound body was left in an atmosphere of 60 ° C. and 90 RH for 96 hours, it was rewound and examined for floating. No floating was observed.

[0121]

When the heat-sensitive recording material of the present invention is used in a tape printer, the winding length can be increased, so that the replenishment interval of the heat-sensitive recording material can be lengthened. Alternatively, the cassette and the printer can be downsized. Further, the structure of the cassette and the printer is simplified, and high dimensional accuracy is not required.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an example of a heat-sensitive recording material according to an embodiment A of the present invention.

FIG. 2 is a partial cross-sectional view showing another example of the heat-sensitive recording material of the embodiment A.

FIG. 3 is a partial cross-sectional view showing still another example of the heat-sensitive recording material of the embodiment A.

FIG. 4 is a partial cross-sectional view showing an example of the thermal recording material according to the embodiment B of the present invention.

FIG. 5 is an explanatory diagram showing an example of a tape printer using the thermosensitive recording material of the present invention.

FIG. 6 is an explanatory diagram showing floating of a release material in a thermal recording material.

FIG. 7 is an explanatory diagram showing a running state of the heat-sensitive recording material in the tape printer.

FIG. 8 is an explanatory diagram showing a conventional tape printer.

[Explanation of symbols]

 1 Base Material 2 Thermosensitive Coloring Layer 3 Pressure Sensitive Adhesive Layer 4 Release Material

Claims (6)

[Claims] 1. A tape-shaped thermosensitive recording material for use in a tape printer equipped with a thermal head, wherein a thermosensitive coloring layer is provided on one surface of a base material, and a release material is provided on the other surface via a pressure-sensitive adhesive layer. A heat-sensitive recording material for a tape printer, characterized by being laminated. 2. The thermosensitive recording material according to claim 1, wherein a transparent protective layer is provided on the thermosensitive coloring layer. 3. The heat-sensitive recording material according to claim 1, wherein a concealing layer is provided between the substrate and the heat-sensitive color forming layer. 4. The heat-sensitive recording material according to claim 1, 2 or 3, wherein the heat-sensitive color forming layer comprises a single layer containing both a color-forming substance and a developer. 5. The heat-sensitive color-developing layer comprises a layer containing a color-forming substance and a layer containing a color-developing agent.
The heat-sensitive recording material described. 6. The heat-sensitive recording material according to claim 5, wherein both the layer containing the color-forming substance and the layer containing the developer are transparent.