JP5029264B2 - Receiving paper - Google Patents

Description

  The present invention relates to an image receiving paper, and more particularly, in an image receiving paper having a receiving layer formed on a base material, when printing is performed on the image receiving paper under the condition of high-speed thermal transfer recording, the printed matter may be blurred. The image receiving paper does not occur.

  Conventionally, characters and images are formed on a transfer medium using a thermal transfer method. As the thermal transfer method, a thermal sublimation transfer method and a thermal fusion transfer method are widely used. Of these, the heat-sensitive sublimation transfer method uses a sublimation dye as a color material, and uses a heating device such as a thermal head or laser light whose heat is controlled according to image information, and uses a sublimation dye layer on the thermal transfer sheet. In this method, an image is formed by transferring the dye inside to a transfer medium such as a thermal transfer image receiving sheet. This heat-sensitive sublimation transfer system can control the amount of dye transfer in dot units by heating for a very short time. The image formed in this way is very clear because the coloring material used is a dye and is excellent in transparency, so the resulting image is excellent in halftone reproducibility and gradation, An extremely high-definition image can be obtained. For this reason, a high quality image comparable to a full-color silver salt photograph can be obtained.

  Due to the development of various hardware and software related to multimedia, this thermal transfer system is a full color hard copy system for analog images such as digital graphics and video such as still images by computer graphics, satellite communications and CD-ROM. As the market is expanding. The specific uses of the thermal transfer image receiving sheet by this thermal transfer method are various. Typical examples include printing proofs, image output, OHP sheets for presentations, design and design output for CAD / CAM, various medical analyzers such as CT scans and endoscope cameras, and measurements. Output of equipment and as an alternative to instant photos, output of face photos to ID cards, ID cards, credit cards, and other cards, and composite photos at amusement facilities such as amusement parks, game centers, museums, and aquariums , Souvenir photos, picture postcards, etc.

  With the widespread use of such thermal transfer methods, the printing speed of thermal transfer recording methods has been increasing, and sufficient transfer sensitivity cannot be obtained even if the conventional thermal transfer sheet is printed with conventional thermal energy. Problems have arisen. Furthermore, there is a demand for a higher density and clearer image printed by thermal transfer, and an attempt to improve transfer sensitivity is required. In view of this, improvements have been made such as obtaining a desired transfer sensitivity by reducing the thickness of the base sheet and printing with conventional thermal energy, or increasing the thermal energy during printing. However, in these methods, the amount of heat applied to the thermal transfer sheet is large, the dye layer and the dye receiving layer of the transfer material are thermally fused, or not only the dye of the dye layer but also the dye layer is transferred to the transfer material. So-called abnormal transfer has occurred, and defects such as uneven printing on the transfer material due to generation of wrinkles on the thermal transfer sheet during thermal transfer recording have become apparent. In contrast to this, attempts have been made using a technique for adding a large amount of a release agent such as silicone into the receiving layer as shown in Patent Documents 1 and 2, but the storability of the printed matter is poor and practically used. Problems arise.

  In addition, the current printer usually has a printing speed of 1.69 to 12.1 cm / sec, but the applied power that is instantaneously applied when printing at a high speed (4.23 to 12.1 cm / sec). Will increase. For this reason, when a black thermal transfer image is formed by superimposing three colors of the dyes from each dye layer in the order of yellow, magenta, and cyan under high-speed thermal transfer recording conditions, the glossiness of the surface of the printed material is lost ( Matting), and a phenomenon (blurring) in which the hue of the thermal transfer in which the printed material should be black becomes reddish occurs. In particular, maxO. D. However, in the high density (1.9 to 2.1) part, the above-described matting and fading phenomenon are likely to occur. In particular, the phenomenon of fading occurs locally, and as a result, the print density of the faint portion decreases.

  Explaining the above phenomenon, when the dye is transferred from the thermal transfer sheet to the thermal transfer image receiving sheet, the thermal transfer sheet and the thermal transfer image receiving sheet are fused and cannot be smoothly peeled off, and the surface of the printed material is matte (rough surface). become. Thermal unevenness occurs when printing on the surface where the surface has become rough, and at the same time, the receiving layer of the thermal transfer image-receiving sheet is not able to withstand heat and is taken to the thermal transfer sheet side, which causes blurring and matting To be judged. Further, the higher the density of the printed material, the more the matting or fading is likely to occur because the plasticization of the receiving layer is promoted.

On the other hand, many attempts have been made to devise and improve the composition of the receiving layer in the thermal transfer image-receiving sheet (see, for example, Patent Documents 3, 4, and 5). In Patent Document 3, a cured resin-coated surface obtained by applying a radiation-curable resin-containing coating composition and radiation curing is used as a dye-receiving layer, and the glass transition point of the cured resin-coated layer (in dynamic viscoelasticity measurement) tan δ peak value) is 0 ° C. or higher and 80 ° C. or lower, and the storage elastic modulus (E ′) of the cured resin coating layer at the glass transition point + 30 ° C. obtained in the dynamic viscoelasticity measurement is 1 × It is proposed that it is 10 ⁷ Pa or more and 1 × 10 ⁸ Pa or less.

In Patent Document 4, the main component polymer in the image receiving layer exhibits a melt viscosity of 10 ⁶ Pa · S or more at 140 ° C. and a melt viscosity of 10 ⁵ Pa · S or more at 160 ° C. It has been proposed to be composed of at least one member selected from a polymer containing an ester bond unit therein and a crosslinked product thereof.

In Patent Document 5, the dye image-receiving layer is a dicarboxylic acid containing (a) 50 mol% or more of a diol component containing an alkylene glycol adduct of bisphenol A having a defined structure and (b) 50 mol% or more of terephthalic acid. At least one member selected from a polyester polymer obtained by a copolymerization condensation reaction with components and having a glass transition point of 40 to 70 ° C. and an elastic modulus of 5 × 10 ⁸ Pa or more at 60 ° C., and a crosslinked product thereof Is contained as a main component.

However, in the thermal transfer image receiving sheet as described above, even if the transfer sensitivity of the dye at the time of thermal transfer is improved, it has not reached a level that can sufficiently eliminate matting and fading on the surface of the printed material.
JP-A-8-108636 JP 2006-264543 A JP 2003-63154 A Japanese Patent No. 2904544 Japanese Patent No. 2933338

  Therefore, in order to solve the above-mentioned problems, when printing on image receiving paper under the condition of high-speed thermal transfer recording, there is no blurring on the printed matter or the surface of the receiving layer becomes rough, and abnormal transfer in printing. It is an object of the present invention to provide an image-receiving paper that can prevent the occurrence of a problem and can provide a sufficiently satisfactory printed matter.

In order to solve the above problems, the invention according to claim 1 is a substrate having at least a paper layer, a porous film layer made of porous polypropylene formed on the substrate, and the porous film layer. In the image receiving paper comprising the receiving layer formed on the substrate and the base material and the porous film layer bonded together with an adhesive, the rigidity of the image receiving paper in the MD direction when measured by a Gurley stiffness meter der above 1300mg is, the ratio of the thickness of the paper layer in the thickness of the base material is not more than 86.0% over 76.8%, the density of the paper layer is 0.87 g / cm ³ or more 1. wherein the 02G / cm ³ or less der Rukoto.

  According to this, since the stiffness of the image receiving paper is 1300 mg or more, when printing is performed on the image receiving paper under the condition of increasing the speed of thermal transfer recording, the printed material may be blurred or the surface of the receiving layer becomes rough. Therefore, it is possible to prevent abnormal transfer in printing and obtain a sufficiently satisfactory print.

According to this, when the ratio of the thickness of the paper layer to the thickness of the base material is 76.8% or more and 86.0% or less , the stiffness of the image receiving paper can be 1300 mg or more. When printing on image-receiving paper under the conditions of high-speed printing, there is no blurring of the print or the surface of the receiving layer is roughened, preventing abnormal transfer in the print and obtaining a sufficiently satisfactory print Can do.

According to this, when the density of the paper layer is 0.87 g / cm ³ or more and 1.02 g / cm ³ or less , the stiffness of the image receiving paper can be 1300 mg or more. When printing on the image receiving paper below, the printed matter is not faded or the surface of the receiving layer is roughened, and abnormal transfer in the printed matter is prevented, and a sufficiently satisfactory printed matter can be obtained.

In order to solve the above-mentioned problem, the invention according to claim 2 is the image receiving paper according to claim 1 , wherein the base is formed on the first synthetic resin layer and the first synthetic resin layer. The paper layer and a second synthetic resin layer formed on the paper layer.

  According to this, by forming the synthetic resin layers (first synthetic resin layer, second synthetic resin layer) on both sides of the paper layer, it is possible to prevent the image receiving paper from curling.

In order to solve the above problem, the invention according to claim 3 is the image receiving paper according to claim 2 , wherein the thickness of the first synthetic resin layer is thicker than the thickness of the second synthetic resin layer. Features.

  According to this, when the thickness of the first synthetic resin layer is larger than the thickness of the second synthetic resin layer, it is possible to suitably prevent the image receiving paper from curling.

  According to the present invention, when printing on image receiving paper under the condition of high-speed thermal transfer recording, the printed matter is not blurred and the surface of the receiving layer is not roughened. Can be obtained.

  The image receiving paper of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing the image receiving paper of the present invention.

(Image receiving paper)
As shown in FIG. 1, the image receiving paper of the present invention was formed on a substrate 10 having at least a paper layer 3, a porous film layer 6 formed on the substrate 10, and a porous film layer 6. It is characterized by the fact that the stiffness of the image receiving paper 100 formed in this way is 1300 mg or more.

  In the present application, the upper and lower terms indicate the upper and lower sides of the image receiving paper 100 when the receiving layer 8 is placed on the substrate 10.

  Hereinafter, the features of the present invention will be described while specifically explaining each layer of the image receiving paper of the present invention with reference to FIG.

(Base material)
The base material 10 has a role of holding the receiving layer 8 and heat is applied during thermal transfer. Therefore, the base material 10 preferably has a mechanical strength that does not hinder handling even in a heated state. In the present invention, the base material 10 has at least the paper layer 3. In this embodiment, the base material 10 is formed on the first synthetic resin layer 2, the paper layer 3 formed thereon, and thereon. The following description will be made assuming that the second synthetic resin layer 4 is composed of three layers.

(First synthetic resin layer, second synthetic resin layer)
The first synthetic resin layer 2 and the second synthetic resin layer 4 include a material that does not allow the liquid composition for forming the receiving layer 8 to penetrate into the image receiving paper 100 and has a film forming ability. It is formed from a resin layer. The material of the first synthetic resin layer 2 and the second synthetic resin layer 4 is preferably a thermoplastic resin such as a polyolefin resin, a polycarbonate resin, a polyester resin, a polyamide resin, and a mixture thereof. Polyolefin resins and / or polyester resins are more preferred, and polyethylene resins are particularly preferred.

  In the case where the resin in the front resin layer and the back resin layer is a thermoplastic resin, preferably a polyolefin resin, particularly preferably a polyethylene resin, the base material 10 is used for the front resin layer and the back resin layer on the traveling paper layer 3. The resin composition for the resin layer is produced by a so-called melt extrusion coating method in which a resin composition for a resin layer is cast and coated from the slit die into a film using a melt extruder. Moreover, it is preferable to subject the base paper to activation treatment such as corona discharge treatment and flame treatment before coating the resin composition on the base paper. Moreover, the surface of the first synthetic resin layer and the second synthetic resin layer can be processed into a fine rough surface, a matte surface or a silky surface using a cooling roll used in a melt extruder, and the back resin layer is Usually, it is preferable to process the matte surface.

  The first synthetic resin layer and the second synthetic resin layer can also be formed by a conventionally known coating method such as gravure coating or roll coating. Examples of materials for the first synthetic resin layer 2 and the second synthetic resin layer 4 at that time include polyester resins, urethane resins, acrylic resins, vinyl chloride-vinyl acetate copolymers, and the like. The first synthetic resin layer 2 and the second synthetic resin layer 4 may be layers formed of different types.

  Thus, by forming the synthetic resin layers (the first synthetic resin layer 2 and the second synthetic resin layer 4) on both surfaces of the paper layer 3, it is possible to prevent the image receiving paper 100 from curling.

  Here, the thickness of the first synthetic resin layer 2 is greater than the thickness of the second synthetic resin layer 4. Specifically, the thickness of the first synthetic resin layer 2 is preferably 10 to 60 μm, and particularly preferably 20 to 40 μm. The thickness of the second synthetic resin layer 4 is preferably 1 to 30 μm, and particularly preferably 10 to 20 μm.

  Thus, when the thickness of the first synthetic resin layer 2 is thicker than the thickness of the second synthetic resin layer 4, it is possible to suitably prevent the image receiving paper 100 from being curled further.

(Paper layer)
As the paper layer 3, for example, synthetic paper, high-quality paper, art paper, coated paper, cast coated paper, photographic base paper, or the like can be used.

  Here, the ratio of the thickness of the paper layer 3 to the thickness of the base material 10 is 50% or more.

  As a result, the stiffness of the image receiving paper 100 can be set to 1300 mg or more by measuring with a Gurley stiffness meter. Therefore, when printing on the image receiving paper 100 under the condition of high-speed thermal transfer recording, the printed matter No fading or roughening of the surface of the receiving layer, preventing abnormal transfer in printing, and a sufficiently satisfactory print can be obtained.

  The thickness of the image receiving paper 100 described above is preferably 170 to 300 μm, and the ratio of the thickness of the base material 10 to the thickness of the image receiving paper 100 is preferably 60 to 90%, and more than 80%. It is particularly preferred. Further, the ratio of the thickness of the paper layer to the thickness of the substrate 10 is preferably 50% or more, and particularly preferably 80% or more.

Furthermore, the density of the paper layer is 0.8 g / cm ³ or more and less than 1.4 g / cm ³ .

  As a result, the rigidity of the image receiving paper 100 can be set to 1300 mg or more. Therefore, when printing on the image receiving paper 100 under the condition of high-speed thermal transfer recording, the printed material is blurred or the surface of the receiving layer is roughened. Therefore, it is possible to prevent abnormal transfer in a print and obtain a sufficiently satisfactory print.

(adhesive)
The adhesive 5 is used for bonding the following porous film layer 6 on the base material 10.

  Adhesive performance varies depending on the type of substrate 10 and its surface treatment, but urethane resins, polyolefin resins, and vinyl resins are common. In addition, when a thermoplastic resin having active hydrogen and a curing agent such as an isocyanate compound are used in combination, good adhesion can be obtained.

(Porous film layer)
The porous film layer 6 is formed on the base material 10 described above, and can improve the heat insulating property of the image receiving paper 100.

Examples of the porous film layer 6 include a porous polypropylene film, a porous polyethylene terephthalate film, and a porous polystyrene film.
Here, the thickness of the porous film layer 6 is preferably 10 to 100 μm, and particularly preferably 35 to 75 μm.

(Middle layer)
An intermediate layer may be formed between the porous film layer 6 and the receiving layer 8 described later. Examples of the function of the intermediate layer include solvent resistance performance, barrier performance, adhesion performance, white color imparting performance, hiding performance, cushioning property, antistatic property, etc. Can be used.

(Receptive layer)
The receiving layer 8 is formed from a resin having a property of receiving a heat sublimable dye or a heat-melt transferable dye. Examples of such receptive resins include polyolefin resins such as polypropylene, halogenated polymers such as polyvinyl chloride and polyvinylidene chloride, polyvinyl acetate, polyacrylic esters, and vinyl chloride / vinyl acetate copolymer resins. Polyester resins such as vinyl polymers, polyethylene terephthalate, polybutylene terephthalate, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene and other vinyl monomers, celluloses such as ionomers and cellulose diacetate Resin, polycarbonate resin and the like can be used.

  Although the thickness of such a receiving layer 8 is not specifically limited, Generally the thickness of 1-50 micrometers is preferable. The receiving layer 8 is preferably a continuous film, but may be a discontinuous layer using a resin emulsion or resin suspension. The receiving layer 8 may contain various additives such as a titanium oxide pigment to increase the whiteness of the receiving layer and a silicone oil to improve the releasability from the thermal transfer recording medium. Can be added.

(Back layer)
The lowermost layer (back surface) of the image receiving paper 100 may be provided with a back surface layer 1 for improving the machine transportability of the image receiving paper 100, preventing curling, preventing charging, and the like. In order to improve transportability, it is preferable to add an appropriate amount of an organic or inorganic filler to the binder resin, or to use a resin with high lubricity such as a polyolefin resin or a cellulose resin. In order to obtain an antistatic function, conductive resins and fillers such as acrylic resins, fatty acid esters, sulfate esters, phosphate esters, amides, quaternary ammonium salts, betaines, aminos, ethylene oxide Various antistatic agents such as adducts and other ionic compounds may be added, or provided as an antistatic layer on the back surface or between the back surface layer and the substrate.

  As described above, since the stiffness of the image receiving paper is 1300 mg or more, when printing is performed on the image receiving paper under the condition of increasing the speed of thermal transfer recording, the printed material is blurred or the surface of the receiving layer becomes rough. Therefore, it is possible to prevent abnormal transfer in printing and obtain a sufficiently satisfactory print.

Further, when the ratio of the thickness of the paper layer to the thickness of the substrate is 50% or more and the density of the paper layer is 0.8 g / cm ³ or more and less than 1.4 g / cm ³ , the stiffness of the image receiving paper is 1300 mg. Therefore, when printing on image-receiving paper under the conditions of high-speed thermal transfer recording, the printed matter is not blurred and the surface of the receiving layer is not roughened, thus preventing abnormal transfer in printing. A sufficiently satisfactory print can be obtained. It is possible to prevent the print product from fading.

Next, an Example and a comparative example are given and this invention is further explained in full detail. In the examples, all parts and% are parts by mass and mass% unless otherwise specified.
Example 1
On the porous polypropylene film having a thickness of 39 μm, the coating amounts after drying the intermediate layer coating solution and the receiving layer coating solution having the following compositions are 2.0 g / m ² and 5.0 g / m ² , respectively. The porous propylene film is applied on a 190 μm thick substrate by a dry laminating method so that the coating amount after drying the adhesive is 4.0 g / m ^2. In addition, the image receiving paper of Experimental Example 1 was produced.

The density of the paper layer in the substrate is 1.02 g / cm ³ , the thickness of the image receiving paper is 233 μm, the thickness of the second synthetic resin layer is 0 μm, the thickness of the paper layer is 166.0 μm, the first The thickness of the synthetic resin layer was 27 μm, and the ratio of the paper layer thickness to the substrate thickness was 86.0%.
<Adjustment of intermediate layer coating solution>
Polyester resin (Polyester WR-905: Nippon Synthetic Chemical Industry) 50 parts Titanium oxide (TCA888: Tochem Products) 20 parts Optical brightener TINOPAL IJT: Ciba Japan) 1.2 parts Water / Isopropyl alcohol = 1/1 28.8 parts <Adjustment of receiving layer coating solution>
Vinyl chloride-vinyl acetate copolymer resin (Solvine C: Nissin Chemical Industry) 20 parts Epoxy-modified silicone (X-22-3000T: Shin-Etsu Chemical Co., Ltd.) 2 parts Toluene / Methyl ethyl ketone = 1/1 78 parts <Adhesive coating Liquid adjustment>
Urethane resin (Takelac A-969V: Mitsui Chemicals Polyurethane) 30 parts Isocyanate (Takenate A-5: Mitsui Chemicals Polyurethane) 10 parts Ethyl acetate 60 parts (Example 2)
In the image receiving paper produced in Example 1, the density of the paper layer in the substrate is 1.00 g / cm ³ , the thickness of the image receiving paper is 236 μm, the thickness of the second synthetic resin layer is 0 μm, and the thickness of the paper layer In the same manner as in Example 1 except that the thickness of the first synthetic resin layer was 30 μm, and the ratio of the thickness of the paper layer to the thickness of the base material was 84.7%. An image receiving paper was prepared.
(Example 3)
In the image receiving paper produced in Example 1, the density of the paper layer in the substrate is 0.87 g / cm ³ , the thickness of the image receiving paper is 223 μm, the thickness of the second synthetic resin layer is 0 μm, and the thickness of the paper layer In the same manner as in Example 1, except that the thickness of the first synthetic resin layer is 27 μm and the ratio of the thickness of the paper layer to the thickness of the base material is 85.2%. An image receiving paper was prepared.
Example 4
In the image receiving paper prepared in Example 1, the density of the paper layer in the substrate is 1.00 g / cm ² , the thickness of the image receiving paper is 230 μm, the thickness of the second synthetic resin layer is 13 μm, and the thickness of the paper layer In the same manner as in Example 1, except that the thickness of the first synthetic resin layer is 31 μm and the ratio of the thickness of the paper layer to the thickness of the base material is 76.8%. An image receiving paper was prepared.

Comparative example

(Comparative Example 1)
In the image receiving paper produced in Example 1, the density of the paper layer in the substrate is 0.87 g / cm ³ , the thickness of the image receiving paper is 222 μm, the thickness of the second synthetic resin layer is 0 μm, and the thickness of the paper layer Comparative Example 1 in the same manner as in Example 1 except that the thickness of the first synthetic resin layer was 27 μm, and the ratio of the thickness of the paper layer to the thickness of the base material was 85.2%. An image receiving paper was prepared.
(Comparative Example 2)
In the image receiving paper produced in Example 1, the density of the paper layer in the substrate is 0.87 g / cm ³ , the thickness of the image receiving paper is 221 μm, the thickness of the second synthetic resin layer is 15 μm, and the thickness of the paper layer Comparative Example 2 in the same manner as in Example 1 except that the thickness of the first synthetic resin layer was 30 μm and the ratio of the thickness of the paper layer to the thickness of the base material was 75.1%. An image receiving paper was prepared.

<Scratch>
Using the image receiving paper of each Example and Comparative Example prepared above, in combination with a dedicated thermal transfer sheet for PegaPixel III printer manufactured by Altec Co., Ltd., perform thermal transfer recording under the following conditions. Evaluation was performed.
(Recording conditions)
Thermal head: F-3598 (Toshiba Hokuto Electronics Co., Ltd.)
Printing pressure: 5kg
Heating element average resistance: 5186 (Ω)
Main scanning direction printing density: 300 dpi
Sub-scanning direction printing density: 300 dpi
Applied power: 0.16 W / dot
Printing (recording) speed: 12.1 cm / sec
Printing width: 150mm
Applied voltage: 29V
Printing start temperature: 28 ° C

However, the applied energy is applied to the yellow, magenta, and cyan dye layers under the same conditions to form a black solid heat transfer image by superimposing the three colors in the order of yellow, magenta, and cyan. The solid image has a reflection density of 1.9 to 2.1 (maximum density) measured using a black filter.
(Evaluation of faintness)
The image receiving papers according to the above examples and comparative examples were left to stand for 2 days under the condition of 23 ° C./50% RH, and then the thermal transfer image state (image receiving surface) Was observed visually to examine the degree of fading.

  In the evaluation, with respect to the state of the thermal transfer image (the state of the image receiving surface), no blur was evaluated as 5, evaluation of blur was evaluated as 1, and blur was evaluated in five stages.

  The results of the above-described evaluation of faintness are as shown in Table 1 below.

Based on the above results, the image receiving paper produced in Examples 1 to 4 has a stiffness of 1300 mg or more when printing on the image receiving paper under high-speed thermal transfer recording conditions of 12.1 cm / sec (yellow). When a black thermal transfer image was formed by superimposing three colors of dyes from each dye layer in the order of magenta and cyan), it was possible to prevent the print from fading.

  On the other hand, the image receiving paper produced in Comparative Examples 1 and 2 has an image receiving paper having a stiffness of 1300 mg or less, and when printing on the image receiving paper under high-speed thermal transfer recording conditions (in order of yellow, magenta, cyan). When the three colors of the dyes from each dye layer were layered to form a black thermal transfer image), the prints were severely blurred.

It is a schematic sectional drawing for demonstrating the image receiving paper of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Back surface layer 2 ... 1st synthetic resin layer 3 ... Paper layer 4 ... 2nd synthetic resin layer 5 ... Adhesion layer 6 ... Porous film layer 7 ... Intermediate | middle layer 8 ... Receptive layer

Claims (3)

A substrate having at least a paper layer;
A porous film layer made of porous polypropylene, formed on the substrate;
A receiving layer formed on the porous film layer,
In the image receiving paper in which the substrate and the porous film layer are bonded together with an adhesive,
Stiffness of the image receiving paper in the MD when measured by Gurley ShikiTsuyoshi meter is Ri der least 1300 mg,
The ratio of the thickness of the paper layer to the thickness of the base material is 76.8% or more and 86.0% or less ,
An image receiving paper, wherein the density of the paper layer is 0.87 g / cm ³ or more and 1.02 g / cm ³ or less . The image receiving paper according to claim 1,
The substrate is
A first synthetic resin layer;
The paper layer formed on the first synthetic resin layer;
A second synthetic resin layer formed on the paper layer;
Receiving sheet, characterized in that it consists. In the image receiving paper according to claim 2,
The image receiving paper, wherein the thickness of the first synthetic resin layer is larger than the thickness of the second synthetic resin layer .