JPH0995051A - Thermal recording material and cassette storing thermal recording material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal recording material and a cassette storing the thermal recording material kept from microbial proliferation caused by hand grime so that these are always clean. SOLUTION: A printing tape 1 consists of a thermal color developing layer 2 provided on one of the surfaces of a resin film base material 4 and an adhesive layer 5 on the other surface with a released paper 6 laminated over the adhesive layer 5. In addition, the color developing layer 2 is loaded with an antibacterial agent 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive recording material capable of forming desired characters and images on a heat-sensitive recording layer by heating and a cassette containing the heat-sensitive recording material.

[0002]

2. Description of the Related Art Generally, a heat-sensitive recording material has a structure in which a color-forming substance and a heat-sensitive color-developing layer containing, as a main component, an acidic substance for coloring the color-forming substance by heating are provided on a substrate. However, recently, there is also a structure in which a colored layer is provided on a base material and a metal thin film layer which dissipates by heating is further provided on the upper surface thereof. In any case, the thermal recording material is
Since it is easier to handle than other practical recording materials and the thermal recording device is relatively inexpensive, it is widely used for output from computers, facsimiles, recorders and the like.

The heat-sensitive recording material is often used as a printing tape in which an adhesive is applied to one side thereof, and these are applied to various places such as writing instruments, telephones, and umbrella patterns used in daily life. It is affixed.

The printing tape used in the printing apparatus is often stored in a cassette and mounted in the printing apparatus.

[0005]

However, when the printing tape obtained by the above printing apparatus is stuck to an object or when the pasted object is used, and the cassette for accommodating this is installed in the printing apparatus. Antibacterial measures have not been taken despite contact with human fingers when putting on and taking off. In particular, in the field of commercial use, since it is used by a large number of people, the printing tape and the cassette are soiled with hand dust and the like, bacteria are generated, and it is very unsanitary.

The present invention has been made to solve the above-mentioned problems, and prevents bacteria from propagating in a printing tape and a cassette for storing the printing tape due to hand marks or the like,
An object of the present invention is to provide a printing tape that is always kept clean and a cassette that stores the printing tape.

[0007]

In order to achieve this object, in the heat-sensitive recording material according to claim 1, an antibacterial agent is added to the heat-sensitive recording material, so that bacteria propagate on the heat-sensitive recording material. The thermal recording material can be kept clean at all times.

Further, the heat-sensitive recording material according to claim 2 is composed of a heat-sensitive recording layer formed on a substrate, and an antibacterial agent is added to the heat-sensitive recording layer, so that the heat-sensitive recording material is free from bacteria. It can prevent breeding and keep the thermal recording material clean at all times.

Further, in the heat-sensitive recording material according to the third aspect, since the heat-sensitive recording layer has an antibacterial agent added to the heat-sensitive coloring layer made of a material which develops color by heating, bacteria propagate on the heat-sensitive recording material. The thermal recording material can be kept clean at all times.

Further, in the heat-sensitive recording material according to the fourth aspect, the heat-sensitive recording layer is formed by laminating a coloring layer and a metal thin film layer on the surface of the coloring layer, and at least one of the coloring layer and the metal thin film layer. Since the antibacterial agent is added, it is possible to prevent bacteria from growing on the heat-sensitive recording material and keep the heat-sensitive recording material always clean.

Further, the heat-sensitive recording material according to the present invention comprises a heat-sensitive recording layer on a base material and a protective layer laminated on the surface thereof, and an antibacterial agent is added to the protective layer. It is possible to prevent bacteria from growing on the heat-sensitive recording material and keep the heat-sensitive recording material always clean.

Further, the heat-sensitive recording material according to claim 6 is further provided with a pressure-sensitive adhesive layer, and an antibacterial agent is added to the pressure-sensitive adhesive layer. The agent layer can always be kept clean.

Further, in the heat-sensitive recording material according to claim 7, since the release paper is adhered to the adhesive layer and the antibacterial agent is added to the release paper, bacteria are prevented from propagating on the release paper. The release paper can always be kept clean.

Further, in the cassette according to claim 8, the thermosensitive recording material is housed, the antibacterial agent is added to the thermosensitive recording material, and the antibacterial agent is added to the members constituting the cassette. It prevents bacteria from multiplying and keeps the cassette clean at all times.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, the tape printer 10 used in the embodiment of the present invention will be described.

As shown in FIG. 6, the tape printer 10
Is a dial for inputting characters 12 on the upper surface of which is movable.
Is provided. Adjacent to the character input dial 12, a function key group 16 for performing various controls of the tape printer 10, such as a power switch 13 and a print key 14, and a liquid crystal display (hereinafter, referred to as a character key or symbol) for inputting characters. , LCD) 18 is provided.

On the back surface of the tape printer 10, FIG.
As shown in FIG. 2, a holding portion 2 for mounting a cassette 30 described later.
0 is formed, and a tape feed roller cam 24 is arranged on the holding portion 20. This tape feed roller cam 2
4 is a motor built in the tape printer 10 (not shown)
The cam 24 is rotated in the direction of the arrow in the drawing by this motor.

In the holding portion 20, the thermal head 2
6 is provided upright, and the thermal head 26 is arranged so as to be positioned inside the opening 31 of the cassette 30 when the cassette 30 is mounted on the holding portion 20. As shown in FIG. 8, a heating element 27 is arranged at the tip of the thermal head 26 along the width direction of the tape to be printed.

In the holding portion 20, a reinforcing rib 28 extending in a direction orthogonal to the tape feeding direction is provided near the tape feeding roller cam 24. The reinforcing rib 28 is arranged so as to be located in the groove 41 of the cassette 30 when the cassette 30 is mounted on the holding portion 20.

Next, the cassette 30 for storing the print tape 1 in the embodiment of the present invention will be described.

As shown in FIG. 5, an opening 31 is formed at the center of the lower end of the cassette 30, and the printing tape 1 is
It is guided to the opening 31. And cassette 30
When the tape is attached to the holding unit 20 of the tape printer 10, the printing tape 1 is pressed against the thermal head 26 and the pressure release member 34 at the opening 31. At this time, the printing surface of the printing tape 1 is located on the thermal head 26 side.

To the right of the opening 31, a tape feed roller 35 is rotatably held in a hole 36 formed in the cassette body 40. Engagement protrusions 37 are formed on the inner peripheral surface of the tape feed roller 35, and when the cassette 30 is mounted on the holding portion 20, the tape feed roller cam 24 is inserted into the tape feed roller 35, and the engaging projection 37 is engaged. The mating protrusion 37 is adapted to engage with the tape feed roller cam 24.

At the right side of the tape feeding roller 35, that is, at the lower right end of the cassette 30, a receiving table 38 is formed on which a movable blade (not shown) is pressed. As shown in FIG. 5, a reinforcing rib 28 is opened above the pedestal 38 so as to be opened toward the back side of the cassette 30 and the cassette 30 is mounted on the holding portion 20 of the tape printer 10. This reinforcing rib 28 in which the groove 41 to be formed is formed is
The pedestal 38 is reinforced against the pressing force of the movable blade by being inserted into

The cassette 30 is formed by injection molding of synthetic resin or the like.

Next, the print tape 1 will be described.

As shown in FIG. 1, the printing tape 1 is provided with a thermosensitive coloring layer 2 on one surface of a resin film substrate 4, an adhesive layer 5 on the other surface, and a release paper 6 attached thereto. It is formed by combining. The tape printer 1
In the case of 0, the thermosensitive coloring layer 2 is colored by the heat generated by the thermal head 26 to form a character image 81.

As the resin film base material 4,
From the viewpoint of strength, polyester, polypropylene, polyethylene, polycarbonate, polystyrene, triacetyl cellulose, polyvinyl chloride, polyimide, polyamide and the like are preferable. From the viewpoint of processability and easiness of handling, the thickness is generally in the range of 12 to 200 μm, preferably 25 to 100 μm.

The thermosensitive coloring layer 2 is formed by adding an antibacterial agent 3 to a material that develops a color when heated.

The thermosensitive coloring layer 2 comprises a leuco dye, a developer which causes a color reaction with the leuco dye when heated to develop the leuco dye, and a color-promoting substance which promotes the color reaction between these leuco dye and the developer. It is composed of an agent, a binder for binding the leuco dye and the color developer, and an auxiliary agent. However, the leuco dye, the color developer, the binder and the auxiliary must be colorless and transparent, and therefore materials having extremely close refractive indexes must be used.

For example, the following leuco dyes can be applied to the thermosensitive coloring layer 2 of the printing tape 1.

(A) Triphenylmethane dye 3,3-bis (P-dimethylaminophenyl) -phthalide, 3,3-bis (P-dimethylaminophenyl) -6
-Dimethylaminophthalide (also known as crystal violet lactone), 3,3-bis (P-dimethylaminophenyl) -6-chlorophthalide, 3,3-bis (P-dibutylaminophenyl) phthalide (also known as malachite green lactone).

(B) Fluoran dyes 3-dimethylamino-6-methoxyfluorane, 3-dimethylamino-6-methyl-7-chlorofluorane, 3
-Dimethylamino-5-methyl-7-dibenzylaminofluorane, 3-diethylamino-7-chlorofluorane, 3-diethylamino-7-methoxyfluorane, 3
-Diethylamino-7-methylaminofluorane, 3-
Diethylamino-7-dibenzylaminofluoran, 3
-Diethylamino-7- (N-methylanilino) fluorane, 3-diethylamino-7-orthochloroanilinofluorane, 3-diethylamino-7,8 benzofluorane, 3-diethylamino-6-methyl-7-chlorofluorane, 3-diethylamino-6-methyl-7-anilinofluorane, 3-diethylamino-6-methyl-7
-P-butylanilinofluorane, 3-diethylamino-5-methyl-7-dibenzylaminofluorane, 3-
Morpholino-5,6 benzofluorane, 3-ethyl-6
-Methyl-7-anilinofluorane, 2-anilino-6
-Diethylaminofluorane, 3- (N-methyl-N-
Cyclohexylamino) -6-methyl-7-anilinofluorane.

(C) Phenothiazine dyes benzoyl leuco methylene blue, 2,2 dimethyl leuco methylene blue, P-anisoyl leuco methylene blue, N-bivalyl leuco methylene blue, (d) Rhodamine lactam dyes N-phenyl rhodamine β-lactam, arhodamine β-Salton.

(V) Spiropyran dyes Benzo-β-naphthospiropyran, 1,3,3-trimethyl-6'-chloro-8'-methoxy-indolinobezospiropyran.

A phenolic compound is used as the developer, and the phenolic compound is liquefied or vaporized at room temperature or higher and reacts with the leuco dye to develop a color of the leuco dye. Examples of the phenolic compound include the following.

4,4'-isopropylidenediphenol (bisphenol A), 4,4'-isopropylidenebis (2-chlorophenol), 4,4'-isopropylidenebis (2-methylphenol), 4, 4'-isopropylidene bis (2-tert-butylphenol),
4,4'-sec-butylidenephenol, 4,4'-
Cyclohexylidenephenol, 4-tert-butylphenol, 4-tert-octylphenol, 4-
tert-octyl caracol, 4-phenylphenol (P-phenylphenol), 4-hydroxydiphenoxide, 2,2′-dihydroxydiphenol, α-naphthol, β-naphthol, methyl-4-hydroxybenzoate, benzyl-4-hydroxy Benzoate, ethyl-4-hydroxybenzoate, propyl-4-hydroxybenzoate, 4-hydroxy-acetophenol, novolac type phenol resin, halogenated novolac type phenol resin, and other phenolic polymers.

Further, as the color accelerating agent, stearic acid amide, stearic acid methylenebisamide, oleic acid amide, palmitic acid amide, mackerel oleic acid amide,
Palm fatty acid amide and the like are applicable.

As the binder, the following compounds can be applied. For example, polyvinyl alcohol, starch or its modified products and derivatives, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, arabic gum, gelatin, casein, polyvinylpyrrolidone, polyacrylamide, polyacrylic acid salt, styrene / maleic anhydride copolymer, isobutylene / anhydrous. Examples include maleic acid copolymers, styrene / butadiene copolymers, polyesters, polyvinyl acetates, polyacrylic acid esters, polyurethanes and the like.

In addition to the above materials, the thermosensitive coloring layer 2 may contain various waxes, higher fatty acid metal salts, higher fatty acid amides, dispersants, lubricants, defoaming agents, fine powders and other auxiliary agents.

As the antibacterial agent 3, silver is used.
Copper, zinc, chitosan, tropolone (hinokitiol), benzalkonium chloride (lauryldimethylbenzylammonium chloride), silicon quaternary ammonium salt, antibacterial ions (silver, copper, zinc) in the structure of zeolite etc. Is mentioned. When these antibacterial agents are added to the thermosensitive coloring layer 2 in an amount of 0.1 to 10% by weight, an antibacterial effect is exhibited.

If the added amount of the antibacterial agent 3 is 0.1% by weight or less, the antibacterial effect cannot be expected because it is too small, and if it is 10% by weight or more, the added amount is too large. The cohesive force is weakened and the thermosensitive coloring layer 2 becomes brittle.

In the printing tape 1, the antibacterial agent 3 added to the thermosensitive coloring layer 2 prevents bacteria from propagating on the printing tape 1 and keeps the printing tape 1 clean at all times.

The printing tape 1 constitutes the thermosensitive recording material of the present invention, and the thermosensitive coloring layer 2 constitutes the thermosensitive recording layer.

Next, the difference between the printing tape 1 and the printing tape 1 which can be used in place of the printing tape 1 will be described with reference to FIG.

The heat-sensitive recording layer 11 is composed of a colored layer 9 and a metal thin film layer 8 laminated on the surface thereof, and the antibacterial agent 3 is added to the colored layer 9 and the metal thin film layer 8. The tape printer 10 forms the character image 82 by a physical coloring mechanism that dissipates the metal thin film layer 8 by heat generated by the thermal head 26 and exposes the underlying colored layer 9 on the surface.

For the coloring layer 9, a dye is dissolved in a room temperature curing type resin such as a room temperature curing type resin silicone, a room temperature curing type rubber silicone, or a room temperature curing type urethane resin, and an antibacterial agent 3 is further added. Formed.

The metal thin film layer 8 is a thin film layer formed by melting a metal such as tin, adding the antibacterial agent 3, and applying the antibacterial agent 3 on the colored layer 9.

The printing tape 50 is applied to the portion other than the character image 82 of the printing tape 50 by the antibacterial agent 3 added to the metal thin film layer 8 and to the portion of the character image 82 due to the antibacterial agent 3 added to the colored layer 9. It is possible to prevent bacteria from propagating and keep the printing tape 50 clean at all times.

The printing tape 50 constitutes the heat-sensitive recording material of the present invention.

In the printing tape 1 or 50, a protective layer 7 may be provided on the surface of each of the thermosensitive coloring layer 2 or the thermosensitive recording layer 11, and the antibacterial agent 3 may be added to the protective layer 7 (printing in FIG. 3). See tape 51 and print tape 52 in FIG. 4). That is, after mixing the antibacterial agent 3 into the protective layer coating liquid,
It is applied onto the thermosensitive coloring layer 2 or the thermosensitive recording layer 11 by using a known coating technique such as a gravure plate.

The protective layer 7 is provided mainly in the printing tape 51 or 52 to enhance the heat resistance and the light resistance of the thermosensitive coloring layer 2 or the thermosensitive recording layer 11. In the printing tape 52, a metal thin film layer is further provided. It also has the function of preventing 8 from being accidentally scratched.

As the resin constituting the protective layer 7, it is preferable to use various film-forming water-soluble resins, such as polyvinyl alcohol, carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylamide, starch, gelatin, polyvinyl pyrrolidone and the like. Examples thereof include one kind or a mixture of two or more kinds. Its coating weight 0.5 to 10 g / m ² in terms of solid content, especially 1 to 5 g / m ² is preferred.

Examples of the waterproofing agent for the protective layer 7 include formalin, glyoxal, chrome alum, melamine, melamine formalin, polyamide resin, polyamide, epichlorohydrin resin and the like.

The protective layer 7 is applied onto the thermosensitive coloring layer 2 or the thermosensitive recording layer 11 by using a known coating technique such as a gravure plate after mixing the antibacterial agent 3 in the protective layer coating liquid made of the above-mentioned materials. It is formed by

Although the antibacterial agent 3 is added only to the thermosensitive coloring layer 2, the thermosensitive recording layer 11 or the protective layer 7 of each printing tape in the above-mentioned embodiment, other parts constituting each printing tape, Alternatively, it is apparent that the antibacterial effect can be obtained even if the other part of the cassette 30 is subjected to the antibacterial treatment with the antibacterial agent 3.

For example, after mixing the antibacterial agent 3 into the adhesive,
When applied on the surface of each printing tape opposite to the surface on which the character image is formed, the adhesive layer 5 of each printing tape can be subjected to antibacterial treatment. The adhesive layer 5 of each printing tape formed by such a method can prevent germs from propagating from the bonded portion when each printing tape is attached to a writing instrument, a telephone, or the like.

In the manufacturing process of the release paper 6, the release paper 6 can be subjected to antibacterial treatment by impregnating the release paper 6 with the antibacterial agent 3. The release paper 6 formed by such a method can prevent germs from multiplying.

After the antibacterial agent 3 is mixed in the synthetic resin, the cassette body 40, the tape feed roller 35, and other members constituting the cassette 30 are formed by injection molding or the like. Each member of the cassette 30 such as 35 can be subjected to antibacterial treatment. Each member formed by such a method can prevent the growth of various bacteria.

[0060]

EXAMPLES Specific examples of the present invention will be described below.

In this embodiment, the antibacterial effect of the printing tape 51 prepared by sequentially forming the thermosensitive coloring layer 2 and the protective layer 7 on the resin film substrate 4 and adding the antibacterial agent 3 to the protective layer 7 is shown. It is an experimental result shown.

It goes without saying that the present invention is not subject to any restrictions by such description.

The present invention is not limited to the following embodiments, and in addition to the above specific description, various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. , That can be modified, improved, etc.
It should be understood.

Example 1 First, in order to prepare a heat-sensitive coating material for forming the thermosensitive coloring layer 2, a solution A and a solution B having the following compositions are prepared.

Liquid A parts by weight Leuco dye 3-diethylamino-6-methyl-7-anilinofluorane 5 parts Binder polyvinyl alcohol 15% aqueous solution 45 parts Water 50 parts Liquid B Developer bisphenol A 10 parts Color accelerator Stearic acid Amide 5 parts Binder Polyvinyl alcohol 15% Aqueous solution 35 parts Water 50 parts Next, separate liquid A and liquid B by ball mill 4
Disperse for 8 hours. Then, these solutions A and B are mixed and then sufficiently mixed and stirred to prepare a heat-sensitive agent coating material.

Next, the heat sensitive coating material is applied to the resin film base material 4
(Polyester film with a thickness of 50 μm, double-sided easy-adhesion treated product) is applied to one surface with a gravure roll so that the coating amount when dried is 5 g / m ^2, and then dried to form the thermosensitive coloring layer 2. did.

Next, in order to form the protective layer 7, a 20% aqueous solution of polyvinyl alcohol was prepared, and 1.0% by weight of the antibacterial agent 3 (antibacterial Zeomic manufactured by Shinagawa Fuel Co., Ltd.) was prepared.
Mixed in the ratio of. Then, after thoroughly mixing and stirring this, it is applied on the thermosensitive coloring layer 2 and dried to obtain an adhesion amount of 2 g /
The m ² protective layer 7 is formed, and the printing tape 51 is completed.

The finished printing tape 51 was inoculated with black mold and left for 48 hours at room temperature.
It was confirmed by visual judgment that the Aspergillus niger had completely disappeared. This is probably because the antibacterial agent 3 exposed on the surface of the printing tape 51 inhibited the growth of Aspergillus niger.

Printing tape 5 obtained by the above process
1 was printed using a commercially available thermal transfer device (fabricated product modified by Brother Industries, Ltd.), a good printed image could be obtained. Also, when printing,
No sticking was observed. Furthermore, when continuous printing was performed, no influence was observed on the thermal head of the thermal transfer device.

Comparative Example 1 A printing tape was formed by using the same material and method as in Example 1 except that the antibacterial agent 3 was not added.

When the finished printing tape was inoculated with Black Aspergillus and left to stand at room temperature for 48 hours, it was confirmed by visual judgment that the amount of Black Aspergillus slightly increased.

[0072]

As is apparent from the above description,
In the heat-sensitive recording material according to the first aspect, since the antibacterial agent is added to the heat-sensitive recording material, bacteria can be prevented from breeding on the heat-sensitive recording material and the heat-sensitive recording material can be always kept clean.

The heat-sensitive recording material according to claim 2 is composed of a heat-sensitive recording layer formed on a substrate, and an antibacterial agent is added to the heat-sensitive recording layer. It can prevent breeding and keep the thermal recording material clean at all times.

Further, in the heat-sensitive recording material according to the third aspect, since the heat-sensitive recording layer has an antibacterial agent added to the heat-sensitive coloring layer made of a material that develops color by heating, bacteria propagate on the heat-sensitive recording material. The thermal recording material can be kept clean at all times.

Further, in the heat-sensitive recording material according to the fourth aspect, the heat-sensitive recording layer is constituted by laminating a coloring layer and a metal thin film layer on the surface thereof, and at least one of the coloring layer and the metal thin film layer. Since the antibacterial agent is added, it is possible to prevent bacteria from growing on the heat-sensitive recording material and keep the heat-sensitive recording material always clean.

Further, the heat-sensitive recording material according to claim 5 is formed by laminating a heat-sensitive recording layer on a substrate and a protective layer on the surface thereof, and an antibacterial agent is added to the protective layer. It is possible to prevent bacteria from growing on the heat-sensitive recording material and keep the heat-sensitive recording material always clean.

Further, the heat-sensitive recording material according to claim 6 is further provided with a pressure-sensitive adhesive layer, and an antibacterial agent is added to the pressure-sensitive adhesive layer. The agent layer can always be kept clean.

Further, in the heat-sensitive recording material according to claim 7, since the release paper is adhered to the adhesive layer and the antibacterial agent is added to the release paper, the growth of bacteria on the release paper is prevented, The release paper can always be kept clean.

Further, in the cassette according to the present invention, the thermosensitive recording material is housed, the antibacterial agent is added to the thermosensitive recording material, and the antibacterial agent is added to the members constituting the cassette. It prevents bacteria from multiplying and keeps the cassette clean at all times.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an internal structure of a printing tape according to an embodiment embodying the present invention.

FIG. 2 is a cross-sectional view showing the internal structure of the printing tape.

FIG. 3 is a cross-sectional view showing the internal structure of the printing tape.

FIG. 4 is a cross-sectional view showing the internal structure of the printing tape.

FIG. 5 is a plan view showing the internal structure of the cassette.

FIG. 6 is a perspective view showing an appearance of a tape printer.

FIG. 7 is a perspective view of the tape printer as viewed from the back side.

FIG. 8 is a perspective view showing a thermal head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printing tape 2 Thermosensitive coloring layer 3 Antibacterial agent 4 Resin film substrate 5 Adhesive layer 6 Release paper 7 Protective layer 8 Metal thin film layer 9 Coloring layer 11 Thermosensitive recording layer 30 Cassette 35 Tape feeding roller 40 Cassette body 50 Printing tape 51 Printing Tape 52 Printing tape

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B41M 5/26 S

Claims (8)

[Claims] 1. A heat-sensitive recording material in which a character image is formed by heating, wherein an antibacterial agent is added to the heat-sensitive recording material. 2. The heat-sensitive recording material according to claim 1, wherein the heat-sensitive recording material is composed of a heat-sensitive recording layer formed on a substrate, and an antibacterial agent is added to the heat-sensitive recording layer. 3. The heat-sensitive recording material according to claim 2, wherein the heat-sensitive recording layer is formed by adding an antibacterial agent to the heat-sensitive color-developing layer made of a material that develops color when heated. 4. The heat-sensitive recording layer is configured by laminating a colored layer and a metal thin film layer on the surface thereof, and an antibacterial agent is added to at least one of the colored layer and the metal thin film layer. Item 3. The heat-sensitive recording material according to item 2. 5. The heat-sensitive recording material is configured by laminating a heat-sensitive recording layer on a substrate and a protective layer on the surface thereof, and an antibacterial agent is added to the protective layer. The heat-sensitive recording material described. 6. The heat-sensitive recording material according to claim 1, wherein the heat-sensitive recording material further comprises an adhesive layer, and an antibacterial agent is added to the adhesive layer. 7. The heat-sensitive recording material according to claim 6, wherein release paper is adhered to the pressure-sensitive adhesive layer of the heat-sensitive recording material, and an antibacterial agent is added to the release paper. 8. A cassette containing the thermosensitive recording material, wherein an antibacterial agent is added to the thermosensitive recording material,
A cassette characterized in that an antibacterial agent is added to the members constituting the cassette.