JPH10272846A - Recording adhesive sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recording adhesive sheet having a sensing mark in printing by providing a print image receiving layer on a rear surface of a release sheet, and printing the mark with oxidation polymerization type ink on the layer in the sheet having a thermal recording layer, base material, adhesive layer and release sheet. SOLUTION: To stably print a sensing mark on the recording adhesive sheet having two or more layers of thermal recording layer, base material, adhesive layer and release sheet, a print image receiving layer is provided on a rear surface of the release sheet, and the mark is printed on the receiving layer with oxidation polymerization type ink. The receiving layer contains inorganic pigment and thermoplastic resin as main components, and has smoothness of 300 to 1500 sec. The base material of the used release sheet is synthetic sheet having a microporous layer or synthetic resin foamable sheet. According to this, even if the mark is printed on a non-release surface of the release sheet, the adhesive sheet in which no trouble occurs can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording pressure-sensitive adhesive sheet useful for recording a full-color image or the like in continuous tone on a recording medium using a thermal head.
More specifically, the present invention relates to a recording pressure-sensitive adhesive sheet capable of stably printing a detection mark on the back surface of a recording pressure-sensitive adhesive sheet.

[0002]

2. Description of the Related Art Color recording of information includes electrophotographic recording,
Various methods such as electrostatic recording, ink jet recording, thermal transfer recording, and thermal recording have been proposed. Above all, the thermal recording method is maintenance-free because it does not require consumables such as toner, ink, and ink ribbon, and is a recording method that has attracted attention.

As a two-color or multi-color (full-color) heat-sensitive recording material, various types of recording materials have been proposed.
For example, a recording medium of a type (addition method) in which two or more heat-sensitive coloring layers which form different colors are provided and two or more colors that can be distinguished by applying different amounts of heat are obtained (Japanese Patent Application Laid-Open No. 48-48). 86543, JP-A-51-146239, etc.). The thermosensitive coloring layer of such a thermosensitive recording medium contains a leuco dye which develops a specific color and a developer.

In addition, two or more thermosensitive coloring layers which similarly form different colors are provided, and two or more discriminable colors are obtained by applying different amounts of heat. A recording medium of a type (color erasing method) in which a color developing layer having only a high-temperature color developing layer is obtained at the time of high-temperature heating by using a color erasing agent having a color erasing action (Japanese Patent Application Laid-Open No. 5555/1985).
JP-A-81193, JP-A-2-80287, etc.).

A recording material of the type (diaso method) in which the diazo compound is decomposed by light and the color of the diazo compound reacts with a coupler to form a color by utilizing heat and light is used. (JP-A-60-242093, JP-A-61-40192, etc.). In the case of this thermal recording, a single color tone of each color forming layer can be obtained by repeatedly performing thermal recording and optical fixing.

[0006] Further, a recording medium combining the above-described color formation of a leuco dye and a color developer with the color formation of a diazo compound and a coupler (JP-A-6-227122, JP-A-6-297).
No. 838), a recording material combining microencapsulation techniques (JP-A-7-276806, JP-A-7-276807, etc.), and a recording material combining heat-responsive microcapsules (JP-A-8-276807). 230328
Japanese Patent Application Laid-Open No. 8-259486), a recording medium using a photothermal conversion agent for converting light energy into heat energy (Japanese Patent Application Laid-Open No. 8-267921, etc.), and the like have been proposed.

When such a multicolor heat-sensitive recording material is processed into a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer and a release sheet laminated on its back surface, the printing position of the pressure-sensitive adhesive sheet is detected by a printer. In order to determine whether or not the front and back sides are set upside down when the printer is mounted, it is necessary to make a detection mark on the non-peeling surface of the peeling sheet, for example, to determine whether or not the front and back are set.

In the case of producing a recording adhesive sheet having a detection mark, there is a method of cutting the detection mark on the back surface while performing UV printing and gravure printing after the adhesive processing. But U
The V ink has a problem in that the heat-sensitive recording layer develops a color due to the heat of the UV lamp, and the gravure ink has a problem in that the heat-sensitive recording layer develops a color due to the heat during drying of the ink.

Therefore, before the release sheet is coated with the adhesive, a detection mark is printed on the non-release surface of the release sheet.
After that, an adhesive is applied and bonded to the base layer. However, ink is attached to the roll of the adhesive processing machine, and the detection mark is printed due to the back surface of the release sheet being stained or the dimensional change of the release sheet being generated. And a misregistration occurs during the subsequent cutting process.

[0010]

In order to solve such a problem, it is conceivable to use coated paper or woodfree paper having good ink drying properties as the base material of the release sheet. Due to the minute thickness unevenness, the contact condition with the thermal head is slightly changed, and printing skips, white spots, and the like occur. If a highly smooth material such as a plastic film is used for the base material of the release sheet, the plastic film has poor cushioning properties, and the adhesion between the thermal head and the recording adhesive sheet cannot be made dense. It is easy to occur and good recording cannot be obtained.

The present invention provides a multi-color heat-sensitive recording pressure-sensitive adhesive sheet, which can perform good full-color (multi-color) recording and does not cause any trouble even when a detection mark on the non-peeling surface of the release sheet is printed. The purpose is to provide.

[0012]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, formed a print image receiving layer on the back surface of a release sheet and printed it with a specific printing ink. The present inventors have found that the object can be achieved, and have reached the present invention.

The present invention relates to a thermosensitive recording layer having two or more layers / substrate /
In a recording pressure-sensitive adhesive sheet composed of a pressure-sensitive adhesive layer and a release sheet, a printing image-receiving layer was provided on the back surface of the release sheet (opposite to the release agent layer), and the detection mark was printed on the print image-receiving layer with an oxidation polymerization type ink. This is a recording pressure-sensitive adhesive sheet. Further, in the present invention, the print image-receiving layer contains an inorganic pigment and a thermoplastic resin as main components, and the TAPPI No. 5
The recording pressure-sensitive adhesive sheet according to the above, wherein the smoothness according to the above is 300 to 1500 seconds.

Further, the present invention is the above pressure-sensitive adhesive sheet for recording, wherein the base material of the release sheet is a synthetic paper or a synthetic resin foam sheet having a microporous layer. Furthermore, the present invention provides the pressure-sensitive adhesive sheet for recording, wherein the surface strength of the print image-receiving layer is 1500 gf / 25 mm or more.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The recording adhesive sheet of the present invention
It is composed of a heat-sensitive recording layer having at least two layers, a substrate, a pressure-sensitive adhesive layer, a release sheet, and a printed image receiving layer. For the heat-sensitive recording layer, various known recording methods capable of performing heat-sensitive recording of two or more colors, including a full-color heat-sensitive recording method, can be appropriately adopted.

The substrate is not particularly limited, but examples include polyethylene terephthalate film, polyamide film, polyaramid film, polycarbonate film, polysulfone film, cellophane, polypropylene film, synthetic paper, coated paper, and high-quality paper. However, it is desirable to use a recording method suitable for the recording method. Also, the substrate and thickness of the substrate are appropriately selected according to the application.

The pressure-sensitive adhesive layer includes a rubber-based pressure-sensitive adhesive layer (for example, a mixture of a synthetic rubber or a natural rubber, a tackifier resin and a softener), and an acrylic pressure-sensitive adhesive prepared by an emulsion polymerization method or a solution polymerization method. For example, a copolymer of acrylic acid ester and an acrylic compound having a functional group),
Alternatively, it can be formed using a silicone-based pressure-sensitive adhesive (for example, a mixture of silicone rubber and silicone resin). Acrylic pressure-sensitive adhesives are most desirable from the viewpoint of cost and weather resistance, and from the viewpoint of improving the adhesion between the surface base material and the pressure-sensitive adhesive as a property of the pressure-sensitive adhesive, and further improving the cohesion and preventing adhesive residue, the internal cohesion is reduced. A strong cross-linking type pressure-sensitive adhesive, that is, a so-called two-part cross-linking type acrylic pressure-sensitive adhesive to which a cross-linking agent is added is suitably used. In this case, the crosslinking agent is usually added to the adhesive in an amount of 0.1%.
Use about 1 to 10% by weight. The pressure-sensitive adhesive layer is applied to a release sheet and dried, and then laminated on a surface of the recording sheet having no recording layer. The coating amount is generally 5 to 2 in solid content.
0 g / m ² .

The substrate of the release sheet is not particularly limited, but may be polyethylene terephthalate film, polyamide film, polyaramid film, polycarbonate film, polysulfone film, cellophane, polypropylene film, synthetic paper, coated paper,
High-quality paper, polylamine paper, and the like are included. From the viewpoint of curling prevention, it is preferable to use the same base material as the multicolor heat-sensitive recording sheet. From the viewpoint of cushioning, smoothness, and heat insulation, synthetic paper having a microporous layer or a synthetic resin foam sheet having a microporous layer is preferable from the viewpoint of cushioning properties, smoothness, and heat insulation. Examples of the synthetic resin foam sheet include a polyethylene terephthalate film. In addition, the microporous layer mentioned here means what was comprised so that it might have a closed-cell-like or a continuous or discontinuous minute crack-like space | gap.

The release agent is not particularly limited, but an appropriate one such as a silicone-based or non-silicone-based release agent can be used. However, it is necessary to control the release force in order to prevent the label from peeling off during running of the printer. Yes, it is preferable to use a silicone release agent. In particular, although not limiting the present invention, the release agent layer is applied and formed on one surface of the release sheet substrate so as to have a thickness of about 30 to 150 μm.

As for the printing image receiving layer, the thermoplastic resin used for the binder may be a resin alone, or may contain an additive such as a crosslinking agent if necessary.
As the thermoplastic resin, an acrylic resin, a vinyl chloride copolymer, a styrene / acrylonitrile copolymer, a polycarbonate resin, a polyester resin, a polyurethane resin and the like are suitably used. If the glass transition temperature of the thermoplastic resin is too low, blocking occurs when stored at a relatively high temperature, or running failure occurs during printing.
It preferably has a glass transition temperature of at least ℃. Among them, a polyester resin exhibiting a high glass transition temperature is preferably used from the viewpoint of heat resistance, blocking resistance, surface scratch resistance and the like.

Examples of pigments to be added to the print image receiving layer to improve the adhesion and drying property of the ink include silicon dioxide, calcium carbonate, magnesium carbonate, zinc oxide, aluminum hydroxide, titanium oxide, calcium silicate, diatomaceous earth, mica, Examples thereof include inorganic pigments of aluminum silicate and magnesium silicate. Organic pigments are subject to considerable temperature during adhesive processing and release agent processing, so they are easily deformed, the coating layer becomes dense, and it does not contribute much to the adhesion and drying properties of the ink of the detection mark, Large amounts are not preferred.

The ratio of the inorganic pigment to the binder is preferably from 5 to 500 parts by weight of the inorganic pigment with respect to 100 parts by weight of the binder, more preferably from 10 to 10 parts by weight of the binder.
It is preferable to mix 20 to 100 parts by weight of the inorganic pigment with respect to 0 parts by weight. If necessary, a dispersant, an antistatic agent, an antiblocking agent, an antifoaming agent, an antioxidant, a viscosity modifier and the like can be added. Coverage of the print-receiving layer, on a dry weight, preferably from 0.1 to 20 g / m ^2, more preferably 0.5 to 10 g / m ^2.

Further, the surface smoothness of the print image receiving layer is preferably from 300 to 1500 seconds, more preferably from 700 to 1200 seconds, so that the ink easily permeates. Incidentally, when the smoothness is 300 seconds or less, the ink drying property is good, but the printing image quality of the recorded image deteriorates, and when it exceeds 1500 seconds, the ink drying property is remarkably poor. The surface smoothness is a value measured by an Oken type smoothness measuring method using an Oken type air permeability flatness tester manufactured by Asahi Seiko Co., Ltd. (J
APPN TAPPI No. 5).

The surface strength of the print image receiving layer is preferably 1500 gf / 25 mm or more because of the abrasion resistance of the print image receiving layer in a printer. If the thickness is less than 1500 gf / 25 mm, the abrasion resistance is poor, so that the non-peeling surface of the release sheet is scratched by running the printer, and the inside of the printer (particularly, the running roll) is easily contaminated. In addition,
The surface strength was determined by taking a 150 mm long test piece in the flow direction and the width direction, and using a glue (trade name: Alon Alpha, manufactured by Toa Gosei Chemical Industry Co., Ltd.) on a stainless steel plate to remove the printed image receiving layer surface of the release sheet. Attachment, peeling speed 0.
This is a value obtained by performing a 180-degree peel test at 3 m / min and measuring the strength when the substrate is broken.

The method of applying the treatment liquid for each layer such as a print image receiving layer, a release agent layer, a pressure-sensitive adhesive layer, and a heat-sensitive recording layer is not particularly limited, and examples thereof include a gravure coater method, a reverse coater method, a reverse gravure coater method, and a kiss coater. Law,
It can be applied by a known method such as a die coating method, a bar coating method, a knife coating method, and a comma coating method. In addition, application speed,
The conditions for drying the coating film are not particularly limited, but the drying conditions for the coating film are desirably within a range that does not adversely affect the physical properties of the print image receiving layer, the release agent layer, the pressure-sensitive adhesive layer, and the heat-sensitive recording layer.

The present invention is characterized in that a detection mark is printed on the print receiving layer of such a recording pressure-sensitive adhesive sheet using an oxidative polymerization type ink. Oxidation polymerization inks generally rely on chemical reactions due to air oxidation, so the curing speed of the ink depends on printing conditions such as temperature, humidity, and dampening water.
Fixing ability is affected. In the present invention, an oxidative polymerization ink that does not use a high-boiling-point petroleum-based solvent that affects the heat-sensitive recording layer on the surface during printing is preferable. For example, it is preferable to use an oxidation polymerization type ink (for example, New Champion Matt Black manufactured by Dainippon Ink and Chemicals, Inc.) provided with ink permeability to the surface of a printed material in order to promote the fixing property of the ink.

[0027]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but it is needless to say that the present invention is not limited to these examples. Parts and% indicate solid parts by weight and solid weight% unless otherwise specified.

Example 1 (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
90 parts of Brilliant 15, manufactured by Shiraishi Industry Co., Ltd., 10 parts of silica (trade name: Mizuka Seal P-526, manufactured by Mizusawa Chemical Industry Co., Ltd.), 40 parts of polyester resin (trade name: Vylonal MD1200, manufactured by Toyobo Co., Ltd.), Water was added to 2 parts of the crosslinking agent and a small amount of the dispersant and the thickener to prepare an aqueous paint having a solid content of 40%.

(Preparation of Release Sheet) Foamed PE of 50 μm
T (trade name: Crisper, manufactured by Toyobo Co., Ltd.) obtained by applying the coating solution for the printing image receiving layer in an amount of 12 g / m ² after drying.
Was applied with a Mayer bar so that Then, a silicone-based release agent (trade name: LTC-750A,
Toray Dow Corning Silicone Co., Ltd.) was applied with a Mayer bar so that the applied amount after drying was 0.2 g / m ² to obtain a release sheet having a release agent layer.

(Preparation of pressure-sensitive adhesive sheet for recording) Subsequently, a polyfunctional aromatic isocyanate was used as a crosslinking agent with respect to 100 parts by weight of an acrylic pressure-sensitive adhesive (trade name: BPS-4849-40N, manufactured by Toyo Ink Mfg. Co., Ltd.). 2 parts by weight (trade name: Coronate L, manufactured by Nippon Polyurethane Industry Co., Ltd.) was added, and the mixture was sufficiently stirred and applied to the release agent layer surface of the release sheet with an applicator such that the applied amount after drying was 15 g / m ^2. By applying, an adhesive layer / release sheet was obtained. After that, it is laminated and laminated on the non-recording layer surface of full-color thermosensitive recording paper (trade name: TA paper, base material is white PET, manufactured by Fuji Photo Film Co., Ltd.), which is composed of multiple recording layers / substrates. An adhesive sheet was obtained.

(Printing of Detection Marks) Subsequently, a seal printing machine (3) was prepared by using an oxidation polymerization type ink (trade name: New Champion Matte Black, manufactured by Dainippon Ink and Chemicals, Inc.) for the print receiving layer of the release sheet. SNP-250
A Flexographic printing). The treatment of the ink set is not particularly performed. By the above operation, a recording adhesive sheet was obtained. The smoothness of the print image receiving layer is 1
The surface strength was 600 gf / 25 mm for 100 seconds.

Example 2 The procedure of Example 1 was repeated except that the detection mark was printed using an oxidation polymerization type ink (trade name: Trans-G Black, manufactured by Dainippon Ink and Chemicals, Inc.). In the same manner as in Example 1, a recording adhesive sheet was obtained.

Example 3 A recording adhesive sheet was obtained in the same manner as in Example 1 except that the following coating liquid for a printing image receiving layer was used as the coating liquid for a printing image receiving layer. The printing image receiving layer had a smoothness of 800 seconds and a surface strength of 600 gf / 25 mm. (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
75 parts of Brilliant 15, manufactured by Shiraishi Industry Co., Ltd., 20 parts of calcium carbonate (trade name: Univer 70, manufactured by Shiraishi Industry Co., Ltd.), silica (trade name: Mizuka Seal P-52)
6, Mizusawa Chemical Industry Co., Ltd.) 5 parts, polyester resin (trade name: Vironal MD1200, manufactured by Toyobo Co., Ltd.) 32.5 parts, cross-linking agent 2 parts, and a small amount of water by adding a dispersant and a thickener. A water-based paint having a solid content of 40% was prepared.

Example 4 A recording adhesive sheet was obtained in the same manner as in Example 1 except that the following coating liquid for a printing image receiving layer was used as the coating liquid for a printing image receiving layer. The smoothness of the print image receiving layer was 2200 seconds,
The surface strength was 1000 gf / 25 mm. (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
Univer 70, Shiraishi Industry Co., Ltd.) 65 parts, Silica (trade name: Mizuka Seal P-526, Mizusawa Chemical Industry Co., Ltd.) 10 parts, Plastic Pigment (trade name: Ropek HG91, Rohm and Haas Japan) 2
5 parts, polyester resin (trade name: Vylonal MD1)
200, manufactured by Toyobo Co., Ltd.), 45 parts of a crosslinking agent, 2 parts of a cross-linking agent, and a small amount of a dispersant and a thickener were added to water to prepare an aqueous paint having a solid content of 35%.

Example 5 In the preparation of the release sheet of Example 1, 50 μm foamed PET (trade name: Chrispar, manufactured by Toyobo Co., Ltd.) having an easy-adhesion coat layer provided on one side was used, and was formed on the easy-adhesion coat layer. A recording pressure-sensitive adhesive sheet was obtained in the same manner as in Example 1 except that a print image-receiving layer was formed. The smoothness of the print image receiving layer is 3
000 seconds, the surface strength was 1000 gf / 25 mm.

Example 6 A recording adhesive sheet was obtained in the same manner as in Example 1 except that the following coating liquid for a printing image receiving layer was used as the coating liquid for a printing image receiving layer. The printing image receiving layer had a smoothness of 500 seconds and a surface strength of 1700 gf / 25 mm. (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
Univer 70, Shiraishi Industry Co., Ltd.) 76.5 parts, diatomaceous earth (trade name: Radioit F, Showa Chemical Industry Co., Ltd.)
11.5 parts, silica (trade name: Mizuka Seal P-52)
6, Mizusawa Chemical Industry Co., Ltd.) 12 parts, acrylic emulsion (trade name: Primal AC-61, manufactured by Rohm and Haas Japan) 32 parts, cross-linking agent 2 parts, and a small amount of water by adding a dispersant and a thickener. A water-based paint having a solid content of 45% was prepared.

Example 7 A recording adhesive sheet was obtained in the same manner as in Example 1 except that the following coating liquid for a printing image receiving layer was used as the coating liquid for a printing image receiving layer. The smoothness of the print image receiving layer was 2000 seconds,
The surface strength was 1800 gf / 25 mm. (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
Univer 70, Shiraishi Industry Co., Ltd.) 80 parts, diatomaceous earth (trade name: Radioite F, Showa Chemical Industry Co., Ltd.) 1
5 parts, silica (trade name: Mizuka Seal P-526, manufactured by Mizusawa Chemical Industry Co., Ltd.) 5 parts, polyester resin (trade name: Vylonal MD1245, manufactured by Toyobo Co., Ltd.)
Water was added to 45 parts, 2 parts of a crosslinking agent, and a small amount of a dispersant and a thickener to prepare a water-based paint having a solid content of 35%.

Example 8 A recording adhesive sheet was obtained in the same manner as in Example 1 except that the following coating liquid for a printing image receiving layer was used as the coating liquid for a printing image receiving layer. The smoothness of the print image receiving layer was 2000 seconds,
The surface strength was 2000 gf / 25 mm. (Preparation of coating solution for printing image receiving layer) Calcium carbonate (trade name:
Univer 70, Shiraishi Industry Co., Ltd.) 80 parts, diatomaceous earth (trade name: Radioite F, Showa Chemical Industry Co., Ltd.) 1
5 parts, silica (trade name: Mizuka Seal P-527, manufactured by Mizusawa Chemical Industry Co., Ltd.) 5 parts, polyester resin (trade name: Vylonal MD1245, manufactured by Toyobo Co., Ltd.)
Water was added to 45 parts, 2 parts of a crosslinking agent, and a small amount of a dispersant and a thickener to prepare a water-based paint having a solid content of 35%.

Comparative Example 1 In the printing of the detection mark of Example 1, the detection mark was printed using UV cure type ink (trade name: Dicure RT-7 black, manufactured by Dainippon Ink and Chemicals, Inc.).
A recording pressure-sensitive adhesive sheet was obtained in the same manner as in Example 1 except that the ink was set with a V irradiation device. The printing image receiving layer had a smoothness of 1100 seconds and a surface strength of 600 gf / 25 mm.

COMPARATIVE EXAMPLE 2 In printing the detection mark of Example 1, the detection mark was printed using a heat-curable ink (trade name: New LP Supermat Ink, manufactured by Toyo Ink Mfg. Co., Ltd.), and the ink was heated by a heating device. A recording pressure-sensitive adhesive sheet was obtained in the same manner as in Example 1 except for setting. The smoothness of the print image receiving layer is 1
The surface strength was 600 gf / 25 mm for 100 seconds.

(Evaluation) The following evaluation was performed on the pressure-sensitive adhesive sheet for recording obtained in this manner.
Shown in

[Smoothness of Printed Image-Receiving Layer] The surface of the printed image-receiving layer was measured for surface smoothness by Oken-type smoothness measuring method (JAPAN TAPPI N).
o. Measured in 5). The higher the value, the higher the smoothness. The unit is expressed in seconds.

[Smoothness of Printed Image-Receiving Layer] A test piece having a length of 150 mm was taken in the flow direction and the width direction, and an adhesive (trade name: Aron Alpha, manufactured by Toa Gosei Chemical Industry Co., Ltd.) was applied to a stainless steel plate. The printed image receiving layer surface of the release sheet was adhered, and a 180 ° peel test was performed at a peel speed of 0.3 m / min to measure the strength when the substrate was broken. The unit is
Expressed as gf / 25 mm.

[Ink Drying Property] After printing the detection mark, the ink drying property when cut and punched was evaluated according to the following criteria. "Evaluation" ○ No show-through △ Slight show-through, but practical level × show-through, not practical

[Registration Failure] After printing the detection mark, the registration failure caused by cutting and punching was evaluated according to the following criteria. "Evaluation" ○ No mark shift △ Slight mark shift, but practical level × mark shift

[Recording image quality] Printer (product name: NC-
2, Fuji Photo Film Co., Ltd.), the density of yellow, magenta, and cyan was measured using an SN color computer, model SM-4, manufactured by Suga Test Instruments Co., Ltd. Compared with the sample, the print quality was evaluated based on the following criteria. "Evaluation" ○ Good printability × Fog occurred during printing, not possible, not practical

[Scratch on Back Side] Printer (trade name: NC-
2, Fuji Photo Film Co., Ltd.), and the presence or absence of scratches on the print image receiving layer (back surface) was evaluated according to the following criteria. "Evaluation" ◎ No scratches ○ Slightly scratched but no practical problems △ Slight scratches but no practical problems × Severe scratches and practical problems

[Comprehensive Evaluation] Evaluation was made according to the following criteria. "Evaluation" ◎ Extremely good practicality ○ Good practicality △ Practical level × Poor practicality

[0049]

[Table 1]

[0050]

According to the present invention, the ink is quickly set after printing, there is no show-through, there is no cutting punching defect such as misregistration, no fogging of the recording layer occurs at the time of printing, and the print quality of the recording layer is low. A good multicolor thermal recording pressure-sensitive adhesive sheet was obtained.

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[Procedure amendment]

[Submission date] October 16, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] Further, a recording medium combining the above-described color formation of a leuco dye and a color developer with the color formation of a diazo compound and a coupler (JP-A-6-227122, JP-A-6-297).
No. 838), a recording material combining microencapsulation techniques (JP-A-7-276806, JP-A-7-276807, etc.), and a recording material combining heat-responsive microcapsules (JP-A-8-276807). 230328
JP, etc. Hei 8-259486 discloses), recording material with light energy <br/> conservation over using a photothermal conversion agent for converting into heat energy (such as JP-A 8-267921 JP) or the like have been proposed ing.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

Further, the present invention is the above pressure-sensitive adhesive sheet for recording, wherein the base material of the release sheet is a synthetic paper or a synthetic resin foam sheet having a microporous layer. Furthermore, the present invention, the surface strength of the printed image-receiving layer is the above described recording adhesive sheet is 1500gf / 25mm or more.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

The pressure-sensitive adhesive layer includes a rubber-based pressure-sensitive adhesive layer (for example, a mixture of a synthetic rubber or a natural rubber, a tackifier resin, and a softener), an acrylic pressure-sensitive adhesive prepared by an emulsion polymerization method or a solution polymerization method ( it can be formed using a mixture) or the like with a copolymer of acrylic compound having an acrylic acid ester and a functional group), or a silicone adhesive (e.g., silicone rubber and silicone resin, for example. From the viewpoint of cost and weather resistance, an acrylic adhesive is most desirable. From the viewpoint of improving the adhesiveness between the surface substrate and the adhesive as a characteristic of the adhesive, further improving the cohesive force, and preventing the adhesive residue, the internal cohesive force is used. A cross-linkable pressure-sensitive adhesive having a strong cross-linking property, that is, a so-called two-liquid cross-linkable acrylic pressure-sensitive adhesive to which a cross-linking agent is added is suitably used. In this case, the crosslinking agent is usually added to the adhesive in an amount of 0.1%.
Use about 1 to 10% by weight. The pressure-sensitive adhesive layer is applied to a release sheet and dried, and then laminated on a surface of the recording sheet having no recording layer. The coating amount is generally 5 to 2 in solid content.
0 g / m ² .

Claims (4)

[Claims] 1. A thermosensitive recording layer / substrate / adhesive layer / two or more layers /
A recording pressure-sensitive adhesive sheet comprising a release sheet, wherein a print image-receiving layer is provided on the back surface of the release sheet, and a detection mark is printed on the print image-receiving layer with an oxidation polymerization type ink. 2. A printing image receiving layer comprising an inorganic pigment and a thermoplastic resin as main components. The pressure-sensitive adhesive sheet for recording according to claim 1, wherein the smoothness according to 5 is 300 to 1500 seconds. 3. The release sheet according to claim 1, wherein the substrate is a synthetic paper or a synthetic resin foam sheet having a microporous layer.
3. The recording adhesive sheet according to item 1. 4. The printing image receiving layer has a surface strength of 1500 gf / 2.
The pressure-sensitive adhesive sheet for recording according to claim 1, which is 5 mm or more.