JP2001260548A - Recording sheet and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording sheet, with which a print operation can be executed stably and a recording sheet having a small size such as a business card size, a card size, a post stamp size or the like, a very thin recording sheet and a whole surface print recording sheet having no non-print part around a print surface can be easily obtained and further which is excellent in curl stability. SOLUTION: In this recording sheet, a recording layer is provided on one side of a support, on the other side of which a pressure-sensitive adhesive layer and a mounting board are provided. Further, the lamination of the support, the pressure-sensitive layer and the mounting board to one another is realized under the state being made separable either at the interface between the support and the pressure-sensitive adhesive layer, or at the interface between the pressure-sensitive adhesive layer and the mounting board or in the interior of the pressure-sensitive adhesive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording sheet for recording a thermal transfer image and the like, and more particularly, to a recording sheet comprising two sheet portions (a support having a recording layer and a backing sheet) which are releasably joined to each other. Sheet (e.g., a thermal transfer image receiving sheet), which can perform printing stably, and can be used by separating a support having a recording layer having an image or the like from a mount after printing. It is about.

[0002]

2. Description of the Related Art In recent years, the use of thermal printers, especially dye thermal transfer printers capable of printing clear full-color images, has become widespread. Dye thermal transfer printers superimpose a thermal transfer image receiving layer (hereinafter also referred to as an image receiving layer) containing a dye-dyeable resin of a thermal transfer image receiving sheet (hereinafter simply referred to as a receiving sheet) on a dye layer of a dye ink sheet. The image is recorded (printed) by transferring the dye of the dye layer onto the image receiving layer according to the shape, color and density of the image by heat supplied from the thermal head corresponding to the image. . Examples of the dye ink sheet include a three-color dye sheet of yellow, magenta, and cyan, or a four-color dye sheet obtained by adding black thereto. A full-color image is obtained by sequentially transferring the dye from the ink sheet of each color onto the receiving sheet in a superimposed manner.

[0003] Such a receiving sheet is expected to be used in various applications since a clear full-color recording can be obtained. For example, a receiving sheet having a small size such as a business card size, a card size, a stamp size, or the like, an extremely thin receiving sheet, a borderless full-size print receiving sheet having no non-print portion around a printing screen, or the like. To satisfy these applications, 2
Pseudo-adhesion method in which two thermoplastic resin layers are heat-pressed to integrate the image receiving sheet portion and the backing portion in a releasable manner (Japanese Patent Laid-Open No.
No. 0-129132), a method of reversing the positions of the pressure-sensitive adhesive layer and the release agent layer of a normal tack-type sublimation receiving sheet to integrate the image receiving sheet portion and the mount portion in a releasable manner (JP-A-11-123880). However, the former pseudo-adhesion method has a problem that the curl is greatly changed after integration and printing cannot be performed, and a problem that the image receiving sheet portion is greatly curled at the time of peeling. In this case, there is a problem that the backing part is sticky after peeling, which makes processing difficult.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a recording sheet which can perform a printing operation stably, is easy to handle, and has a small size such as a business card size, a card size or a stamp size. It is an object of the present invention to provide a very thin recording sheet and a full-page recording recording sheet having no non-printing area around a printing screen, and to provide a recording sheet having excellent curl stability.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that the problems can be solved by examining a method of attaching a support having a recording layer to a mount. The present invention has been completed. That is, the present invention has a recording layer on one side of the support, a pressure-sensitive adhesive layer and a backing sheet on the other side, an interface between the support and the pressure-sensitive adhesive layer, an interface between the pressure-sensitive adhesive layer and the backing sheet, and A recording sheet characterized in that it is laminated so as to be releasable inside any of the pressure-sensitive adhesive layers. Preferably, the recording layer and the support are cut so as to be separable into a plurality of sheet pieces. It is preferable to include an inorganic powder in the pressure-sensitive adhesive layer because stable peeling can be performed. Also, the pressure-sensitive adhesive layer after peeling,
It preferably does not exhibit adhesiveness. Preferably, the recording layer is a thermal transfer receiving layer. Further, the present invention provides a method in which a recording layer is formed on one side of a support and a pressure-sensitive adhesive layer is formed on the other side and / or one side of the backing sheet, and then the other side of the support and one side of the backing sheet are opposed to each other. This is a method for producing the recording sheet, wherein the recording sheet is integrated by applying pressure. It is preferable that the pressure-sensitive adhesive layer before pressing does not have adhesiveness in a normal state, and exhibits adhesiveness when pressed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the structure of a recording sheet according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an example of the recording sheet 1 of the present invention. A recording layer 3 formed on one side of the support 2; a pressure-sensitive adhesive layer 4 on the other side;
Having. The recording sheet includes the recording layer 3 from the recording layer 3 side.
In addition, a cut 7 is formed in the support 2. The cut 7 may reach the pressure-sensitive adhesive layer 4. The recording sheet of the present invention includes an interface between the support 2 and the pressure-sensitive adhesive layer 4, an interface between the pressure-sensitive adhesive layer 4 and the mount 5, and the pressure-sensitive adhesive layer 4.
It is characterized in that it is laminated so that it can be peeled off at one of the insides.

As the pressure-sensitive adhesive layer 4, a known pressure-sensitive adhesive layer used in the field of confidential postcards or the like can be used. The structure of the pressure-sensitive adhesive layer is described in detail. A structure in which a pressure-sensitive adhesive layer having removability is formed on either the support or the backing paper. And a configuration in which one side of the support and the backing sheet comprises a removable adhesive layer and the other side comprises a permanent adhesive layer. The removable adhesive layer and the permanent adhesive adhesive layer do not show adhesiveness in a normal state, and are bonded by pressure lamination with a dry sealer or the like. Such an adhesive layer controls the adhesive strength by using an adhesive and an adhesive strength control agent in combination. The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive mainly composed of natural rubber latex and the like, and fillers such as silica and starch particles added for the purpose of controlling the adhesive force and preventing blocking, and other auxiliaries.

[0008] As the pressure-sensitive adhesive, vinyl chloride resin,
Examples include vinylidene chloride-based resins, natural rubber-based resins, polyacrylate-based resins, and synthetic rubber-based resins. Generally,
As described in JP-A-4-4283 and JP-A-4-59395, a material obtained by graft-polymerizing methyl methacrylate onto natural rubber, a styrene-butadiene rubber or an acrylic synthetic adhesive is used alone. Alternatively, a combination with another resin is used. Above all, a natural rubber-based pressure-sensitive adhesive alone has excellent adhesiveness (self-adhesiveness) to natural rubber itself, more than the adhesive properties exhibited to other adherends, and provides strong adhesion. This is preferable in that the control of the adhesive force is easy.
Graft polymerized methyl methacrylate on natural rubber is preferred from the viewpoint of heat resistance and friction resistance.

The use of a latex having a cationic, anionic or amphoteric functional group as a pressure-sensitive adhesive can impart an antistatic effect, suitability for ink-jet printing, and the like. For example, when an example of a cation-modified natural rubber is given, when grafting an acrylic monomer such as methyl methacrylate to natural rubber, an acrylic monomer such as methyl methacrylate is graft-polymerized to the cationized or natural rubber. When a cationic compound is copolymerized, styrene-butadiene rubber or an acrylic resin that is cationized during synthesis is used alone or in combination with other resins. Those obtained by copolymerizing a cationic compound at the time of graft polymerization of a system monomer are preferable from the viewpoint of adhesiveness as pressure-bonded paper and surface strength of a coating layer. Examples of the cationic compound used for synthesizing the pressure-sensitive adhesive having a cationic property include compounds having a quaternary ammonium group such as vinylbenzyltrimethylammonium chloride and lauryltrimethylammonium chloride, dimethylamine, diethylamine and methyl. A compound having a secondary amino group such as ethylamine is used. Among them, compounds having a quaternary ammonium group are preferably used from the viewpoint of the stability of the paint.

The compounding amount of the pressure-sensitive adhesive is preferably 20 to 60% by weight based on the total solid content of the adhesive layer. When the content is less than 20% by weight, not only a sufficient adhesive strength cannot be obtained at the time of pressurization, but also the strength of the adhesive layer becomes weak. On the other hand, if it exceeds 60% by weight, the adhesive strength becomes too high, and peeling after pressure bonding becomes difficult.

As the adhesion control agent, inorganic and organic pigments can be used. For example, zinc oxide, titanium oxide, zeolite, calcium carbonate, clay, aluminum oxide, starch (eg, wheat starch), silica, alumina, colloidal silica, plastic pigment,
A polyethylene resin, a polypropylene resin, a fluorine-based resin, or the like is used. Wheat starch and silica are suitable for controlling the adhesive and are preferably used. Wheat starch can also be used as a spacer to prevent blocking. Particles having a particle size of about 10 to 50 μm are used. Silica is also excellent in ink receptivity, and can impart functionality such as printability and inkjet recording suitability. Fluorine-based resins are highly effective in preventing ink bleeding. Titanium oxide has a high hiding effect, and the hiding effect is further enhanced by mixing with silica. Zeolite can also improve ink jet recording properties when used in combination with silica. As silica, those conventionally used in confidential postcards and the like can be used. Among them, fine powder synthetic silica is preferable. Finely powdered synthetic silica is roughly classified into a wet method and a dry method according to its production method. The wet method is obtained by using sodium silicate as a raw material and neutralizing with an acid to precipitate silica. The wet method is further divided into a precipitation method and a gelation method. The dry method is obtained by using silicon tetrachloride as a raw material, burning it with hydrogen and oxygen, and depositing silica. Usually, it is called white carbon, and is known as silicic anhydride, hydrated silicic acid, and the like. The average particle diameter of silica is not particularly limited, but is preferably about 0.5 to 20 μm. Further, the amount of silica used in the adhesive layer is not particularly limited, but is preferably in the range of 5 to 60% by weight based on the solid content of the adhesive layer in consideration of the adhesive force under pressure, surface strength, and the like. It is preferable to use them. Regarding the oil absorption of the finely powdered synthetic silica, those usually used for coated paper can be used, but it is known that if the oil absorption is 150 ml / 100 g or more, the ink jet recording suitability can be improved. .

Various water-soluble binders can be added to the pressure-sensitive adhesive layer for the purpose of improving the surface strength of the coating film. Examples of the water-soluble binder include proteins such as casein, soy protein, and synthetic protein, various starches such as oxidized starch and etherified starch, polyvinyl alcohol, silyl-modified polyvinyl alcohol, cation-modified polyvinyl alcohol, and cellulose such as carboxymethyl cellulose and methyl cellulose. Conventionally known binders generally used for coated paper, such as derivatives, may be used alone or in combination.

The pressure-sensitive adhesive layer contains a polyalkylene polyamine such as polyethylene polyamine or polypropylene polyamine, or a derivative thereof within a range that does not affect the physical properties of the coating solution of the pressure-sensitive adhesive layer and the adhesive strength under pressure. , Third
By adding a cationic compound (cationic resin) such as an acrylic resin having a quaternary amino group or a quaternary ammonium group or diacrylamine, it is also possible to impart an antistatic effect or water resistance to images for inkjet recording.

Various auxiliaries are added to the coating solution for forming the pressure-sensitive adhesive layer, if necessary. As the auxiliary agent to be added,
Pigment dispersants, thickeners, flow improvers, defoamers, foam inhibitors,
Release agents, foaming agents, penetrants, coloring dyes, ultraviolet absorbers, antistatic agents, cationic, nonionic or amphoteric surfactants, antioxidants, preservatives, water resistance agents, and the like,
Used as needed.

The pressure-sensitive adhesive layer is formed on at least one of the support and the backing paper by coating or printing. Coating method,
The printing method can use a known device, and is not particularly limited. With respect to coating methods excellent in mass production, various examples include blade coaters, roll coaters, air knife coaters, bar coaters, gravure coaters, curtain coaters, and the like.In the present invention, air knife coaters, bar coaters, A gravure coater or the like is preferred. The coating amount of the pressure-sensitive adhesive layer is in the range of about ² to 30 g / m ² , preferably 3 to 15 g / m ² .

After forming the pressure-sensitive adhesive layer on at least one of the support and the backing paper, the surface of the pressure-sensitive adhesive layer does not show adhesiveness in a normal state, and is first adhered by pressing with a dry sealer or the like. It shows the nature. Therefore, the support and the backing sheet are first bonded and integrated by applying pressure through the pressure-sensitive adhesive layer to obtain a recording sheet.
The pressure-sensitive adhesive layer hardly adheres when a pressure (weak pressure) of 1 kg / cm ² is applied in a superimposed state, and the T-peel force is 10 g / 25 mm or less even when adhered. 300kg / cm ²
When a pressure (strong pressure) is applied, the layer is preferably a layer that adheres and exhibits a T-type peeling force of 50 g / 25 mm or more.

The pressure-sensitive adhesive layer may be subjected to printing, printing, or the like before bonding the support and the backing paper. For example, confidential information and general information can be printed by an electrophotographic printer, an inkjet printer, or the like. Also,
The recording layer may be formed after the support and the mount are bonded, or the recording layer may be formed on the support surface first and then bonded to the mount.

As the recording layer formed on one side of the support, a recording layer suitable for a known recording method such as sublimation thermal transfer recording, melt thermal transfer recording, ink jet recording, and thermosensitive color recording can be formed. Of course, a recording layer having a plurality of recording suitability may be used.

Hereinafter, when sublimation thermal transfer recording is disclosed as a typical example of a recording layer, a known image receiving layer is adopted as the recording layer. As the resin for forming the image receiving layer, a resin having a good affinity for the dyeing dye from the ink ribbon is used. As such a thermal transfer image receiving resin, a polyester resin, a polycarbonate resin, a vinyl chloride copolymer, a polyvinyl acetal resin, a cellulose derivative and the like can be used. In order to prevent the image receiving layer from fusing with the ink ribbon due to heating of the thermal head during printing, at least one of a crosslinking agent, a slipping agent, and a release agent is added to the resin. Is preferred. If necessary, one or more of a fluorescent dye, a plasticizer, an antioxidant, a pigment, and an ultraviolet absorber may be added to the image receiving layer. These additives may be mixed with the components for forming the image receiving layer and applied, or may be applied as a coating layer separate from the image receiving layer on and / or below the image receiving layer. .

The recording layer is coated with a coating liquid for forming a recording layer on the surface of the support by a conventional method using a coater such as a bar coater, a gravure coater, a comma coater, a blade coater, an air knife coater, and dried. Can be formed. In the case of the thermal transfer receiving layer, the coating amount (dry) is about 1 to ²⁰ g / m ² , and more preferably 5 to 10 g / m ² .

Examples of the support on which the recording layer is formed include paper bases such as coated paper, art paper, cast coated paper and woodfree paper, laminated paper obtained by laminating a resin such as polyethylene on a paper base, polyester (eg PET) ), Nylon, polyolefin, polyvinyl chloride, cellophane and the like, and synthetic paper. These may be two or more layers laminated. In particular, when the thermal transfer recording layer is formed, a support in which two or more layers are laminated is preferable. For example, (film or synthetic paper) / (paper base) / (film or synthetic paper) and (film or synthetic paper) / ( PET film) / (film or synthetic paper)
When using a support having a three-layer structure such as,
A clear image can be received in the thermal transfer image receiving layer formed thereon.

The film and synthetic paper used as the support include those having a foamed porous layer, those having a void layer formed by stretching, and those having a skin layer on the surface and a void inside. Preferably, there is. When paper is used as a support, there is no particular limitation as long as it is a cellulose pulp as a main component. It can be appropriately selected and used. Further, one or more of non-wood pulp such as hemp and cotton, and synthetic pulp using polyethylene, polypropylene or the like as a raw material may be used in combination. Further, in addition to the above pulp, organic fibers such as acrylic fibers, rayon fibers, phenol fibers, polyamide fibers, and polyester fibers, and inorganic fibers such as glass fibers, carbon fibers, and inorganic fibers such as alumina fibers.
More than one kind of fiber can be mixed. However,
From the viewpoint of maintaining the papermaking properties of the papermaking raw material at a practically feasible level, it is preferable that wood and pulp are blended in an amount of 50% by weight or more. In addition, practically sufficient mechanical strength can be obtained. Generally, the support is preferably 30-300 μm, more preferably 50-250 μm.
m.

Examples of the backing paper include a paper base such as coated paper, art paper, cast coated paper, and high-quality paper; a laminated paper obtained by laminating a resin such as polyethylene on a paper base; polyester (for example, polyethylene terephthalate (PET)); It can be formed using a film of nylon or polyolefin (for example, polypropylene) and synthetic paper. These may be a laminate of two or more layers. When a film, a synthetic paper, or a laminate thereof is used as a support for forming a recording layer, it is preferable to use a film or a synthetic paper also as a backing paper. The support and the backing may be the same or different from each other. In particular, polyethylene terephthalate (PET) film and biaxially oriented polypropylene (O
PP) films are preferably used because they have excellent durability. In the recording sheet of the present invention,
The mount preferably has a thickness of 30 to 300 μm, more preferably 50 to 250 μm.

An intermediate layer may be provided to improve the adhesion between the support and the recording layer and the antistatic property of the recording sheet. Various hydrophilic resins and hydrophobic resins can be used as a binder for forming the intermediate layer, for example, polyvinyl alcohol, vinyl polymers such as polyvinylpyrrolidone and derivatives thereof, polyacrylamide, polydimethylacrylamide, polyacrylic acid or the like. Salts, polymers containing acryl groups such as polyacrylates, polymethacrylic acid, polymers containing methacryl groups such as polymethacrylates, starch, sodium alginate, gum arabic, casein, natural polymers such as carboxymethylcellulose and the like. Can be used. Further, a known antistatic agent can be used alone or in combination with the above resin.

In the recording sheet of the present invention, a back surface coating layer containing an antistatic agent may be formed on the opposite surface (back surface) of the backing paper. In this case, the operation of supplying the composite receiving sheet to the printer, running the printer in the printer, and sending the sheet out of the printer can be performed smoothly. Antistatic agent contained in the back coating layer, for example, polyethylene imine, cationic monomer-containing acrylic resin,
It may be selected from various conductive agents such as a cation-modified acrylamide resin and a cationic starch, and may be contained in an appropriate amount in the back coating layer. Further, as a binder of these additives, for example, a water-soluble polymer such as polyvinyl alcohol, or an acrylic resin, an epoxy resin,
Polyester resin, phenolic resin, alkyd resin,
Urethane resins, melamine resins, and reaction cured products of these resins can be used.

The recording sheet of the present invention, as shown in FIG.
The recording layer and the support can be divided into a plurality of sheet pieces by cuts. As a result, a plurality of sheets having a desired size and shape and having no tackiness can be obtained. Therefore, if a predetermined print is applied to the recording layer adhered to the backing sheet and the sheet piece is peeled off from the backing sheet, a small sheet piece (for example, a business card, card ) Can be obtained.

The cut may be either a perforation or a half cut, but it is preferable that the cut is a clean half cut with less breakage. In the recording sheet of the present invention, there is no limitation on the size and shape of the cut defined by the recording layer and the support, preferably the half-cut, and it is set according to the use of this portion as a sheet piece. Can be.
It is preferable that the half-cut is performed from the recording layer side so that the recording layer and the support, or all or only a part of the pressure-sensitive adhesive layer is cut.

The desired printing may be performed in advance on the back surface of the support, the front surface of the backing sheet, the opposite side (back side) of the backing sheet, or the backside coating layer of the backing sheet. In particular, the inner surfaces to be joined to each other, that is, the back surface of the support and the surface of the backing sheet cannot be observed from the outside of the recording sheet. Can be printed out. Such information can be recognized by peeling off the sheet piece and the backing sheet of the recording sheet.

[0029]

EXAMPLES The present invention will be described below in detail with reference to examples, but the scope of the present invention is not limited by these examples. In Examples, “%” and “parts” all indicate “% by weight” and “parts by weight” unless otherwise specified.

Example 1 Biaxially stretched polyolefin film (trade name: HGU50,
Thickness: 50 μm, manufactured by Oji Yuka Synthetic Paper Co.)
Was coated on both sides of a coated paper (trademark: OK Coat 64, manufactured by Oji Paper Co., Ltd.) by a dry lamination method using a polyester-based adhesive to prepare a support. An anchor coat paint having the following composition was applied to one surface of the support by a bar coating method so that the dry coating amount was 1 g / m ² . "Paint for anchor coat" ・ Polyethyleneimine (trade name: PSP061, manufactured by Nippon Shokubai Chemical Co., Ltd.) 4 parts ・ Ethanol 100 parts

Next, a coating for an image receiving layer having the following composition is applied onto the anchor coat layer by a bar coating method so that the dry coating amount is 6 g / m ² to form an image receiving layer (recording layer). Thus, an image receiving sheet was prepared. "Image receiving layer coating" 100 parts of polyester resin (trademark: Byron 200, manufactured by Toyobo Co., Ltd.) 3 parts of silicon oil (trademark: KF393, manufactured by Shin-Etsu Silicon Co., Ltd.) 3 isocyanates (trademark: Takenate D-110N, Takeda Pharmaceutical Co., Ltd.) 5 parts ・ Toluene 300 parts

On the other hand, on one surface of a porous PET film (trade name: 50E63S, manufactured by Toray) having a thickness of 50 μm, a coating material for the back layer having the following composition was applied by bar coating (drying).
It was coated at 0 g / m ² to form a mount. "Coating for backside layer"-Acrylic resin (trade name: SA-R615A, manufactured by Chuo Rika) 100 parts-Silica pigment (trade name: PM363, manufactured by Mizusawa Chemical Co., Ltd.) 20 parts-Isopropanol 300 parts-Toluene 100 parts

The coating amount of the pressure-sensitive adhesive layer coating material 1 was 10 g on a dry weight basis on the surface of the backing sheet on which the coating material for the back layer was not coated.
/ M ^2, and dried with a Mayer bar to form a pressure-sensitive adhesive layer. The pressure-sensitive adhesive coating composition is shown in dry parts by weight. "Paint 1 for pressure-sensitive adhesive layer"-60 parts of natural rubber latex (trade name: Furtite FB-06OJ, manufactured by Mitsui Fuller)-30 parts of wheat starch (trade name: AS-225, manufactured by Chiba Starch Co.)-synthetic silica (Trademark: Fine Seal X-45, manufactured by Tokuyama Corporation) 30 parts ・ Zeolite (trademark: Toyo Builder, manufactured by Tosoh Corporation) 20 parts ・ PVA (trademark: PVA-217, manufactured by Kuraray Co., Ltd.) 10 parts

On the surface of the support having no image receiving layer (recording layer), the coating amount of the pressure-sensitive adhesive layer coating material 1 is 10 g.
/ M ² with a Mayer bar and dried to form a removable adhesive layer. This was conditioned at 23 ° C. and a temperature and humidity of 65% for 24 hours, and then the pressure-sensitive adhesive layer surface of the mount was opposed to the pressure-sensitive adhesive layer surface of the support, and the roll gap was set to 180 μm. The sheet was passed through a roll and pressed to form a recording sheet. The recording sheet thus obtained was cut into A6 size, and half-cut so as to define a rectangular sheet piece of 9.0 cm × 5.5 cm on the recording layer and the support.

Example 2 A recording sheet was produced in the same manner as in Example 1 except that the coating material 1 for the pressure-sensitive adhesive layer was changed to the following coating material 2 for the pressure-sensitive adhesive layer. "Paint 2 for pressure-sensitive adhesive layer"-40 parts of cation-modified natural rubber-based latex (trade name: Furtite FB-3001, manufactured by Mitsui Fuller Inc.)-SBR-based binder having a cationic and anionic amphoteric functional group (trademark: Acostar C122, manufactured by Mitsui Cytec Co., Ltd.) 20 parts ・ Wheat starch (AS-225, manufactured by Chiba Starch Co., Ltd.) 10 parts ・ Precipitable synthetic silica (Mizukasil P-527, manufactured by Mizusawa Chemical Industry Co., Ltd.) 29 parts

Comparative Example 1 The backing layer of Example 1 was coated with 3
Polyethylene resin heated to 30 ° C (trademark: L719,
(Ube Industries, Ltd.) was coated by extrusion lamination to form a polyethylene resin layer having a thickness of 10 μm. The surface of the polyethylene resin layer was opposed to the surface of the support of Example 1 on which the image receiving layer was not formed (opposite surface).
The sheet was extruded and laminated so as to have a thickness of 0 μm, and was pressed without melting the polyethylene resin layer of the mount to prepare a recording sheet.

"Evaluation" The obtained recording sheet was subjected to a dye pattern thermal transfer printer (trademark: A) using a color bar signal generator (trademark: C13A2, manufactured by Shibazoku Co., Ltd.).
GEP60, manufactured by Matsushita Electric Industrial Co., Ltd.). The measurement results of the adhesive holding property between the support and the backing sheet at the time of printing, the suitability for peeling the support and the backing sheet after printing, the curl stability and the print running property of the article left flat are shown.

<Adhesion Retention> After printing, the presence or absence of separation between the support and the backing paper was visually observed. In Examples 1 and 2 and Comparative Example 1, there was no peeling between the support and the backing paper after printing.

<Stripability> The small sheet pieces divided by half-cutting were peeled after printing. The state of the support and the recording layer after peeling was visually observed. Example 1,
In both Comparative Example 1 and Comparative Example 1, the support and the recording layer peeled cleanly without any breakage, peeling wrinkles, substrate breakage, or the like.

<Curl Stability and Print Runnability of Flat-Standed Articles> Sheet-like articles were allowed to stand flat at 20 ° C. and 60% for one week. The curl before and after standing flat was measured. In both Examples 1 and 2, flat curl before leaving → flat curl after leaving, there was no curl change, and the print running property was good. In Comparative Example 1, the flat curl before standing was changed to the top 20 mm curl after standing, and the print running property was poor.

As is clear from the evaluation results, the recording sheet of each of the examples shows that the support having the recording layer did not peel off from the backing sheet before and during printing, and after printing, the sheet piece was replaced with the support and the pressure-sensitive adhesive. It could be easily peeled off at the interface of the layers, had curl stability, and had good runnability of the neglected product.

[0042]

According to the present invention, a recording sheet having a small size such as a business card size, a card size or a stamp size, which can perform a printing operation stably and is easy to handle, is very thin. A recording sheet that can easily obtain a recording sheet that can be printed on the entire surface without a non-printing area around the printing screen, and that can provide a recording sheet that is excellent in curl stability and mountability after peeling. It is.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a recording sheet of the present invention.

[Explanation of symbols]

 1: Recording sheet 2: Support 3: Recording layer (receiving layer) 4: Pressure-sensitive adhesive layer 5: Backing paper 6: Recording layer and support 7: Notch

Continued on the front page (72) Inventor Shigeo Hayashi 1-10-6 Shinonome, Koto-ku, Tokyo Oji Paper Co., Ltd. Shinonome Research Center F-term (reference) 2H026 AA28 DD32 DD58 FF01 FF17 FF29 GG01 2H086 BA15 BA24 BA33 2H111 AA26 AA27 AA33 CA03 CA05 CA11 CA30 CA31 CA33 CA37 CA44

Claims (7)

[Claims] 1. A support having a recording layer on one side and a pressure-sensitive adhesive layer and a backing on the other side, wherein the interface between the support and the pressure-sensitive adhesive layer, the interface between the pressure-sensitive adhesive layer and the backing, and A recording sheet, which is releasably laminated inside any one of the pressure-sensitive adhesive layers. 2. A notch is made in the recording layer and the support,
2. The recording sheet according to claim 1, wherein the recording sheet is separable into a plurality of sheet pieces. 3. The recording sheet according to claim 1, wherein the pressure-sensitive adhesive layer contains an inorganic powder. 4. The recording sheet according to claim 1, wherein the pressure-sensitive adhesive layer after peeling has no adhesiveness. 5. The recording layer according to claim 1, wherein said recording layer is a thermal transfer receiving layer.
The recording sheet according to any one of the above. 6. After forming a recording layer on one side of the support and forming a pressure-sensitive adhesive layer on the other side and / or one side of the backing sheet,
The method for manufacturing a recording sheet according to any one of claims 1 to 5, wherein the recording medium is integrated by pressing the other side of the support and one side of the backing sheet so as to face each other. 7. The method for producing a recording sheet according to claim 6, wherein the pressure-sensitive adhesive layer before pressing does not have adhesiveness in a normal state, and exhibits adhesiveness when pressed.