JP2003103945A - Material to be recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material to be recorded, which has an excellent receptivity to a hot-meltable ink transferred from a transfer ribbon, with which a high grade image can be formed and which is excellent in printer runnability. SOLUTION: The material to be recorded consists of a sheet-like base material and an image forming layer which is mainly made of a thermoplastic resin and formed on at least one side of the base material, and includes a phosphorus- containing compound. Among elements, the existence in the outermost layer of which is measured by the XPS method, the preferable content of phosphorus is 0.2 to 5%. Further, the preferable phosphorus-containing compound is a phosphoric ester based surfactant.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a recording material. More specifically, the present invention relates to a recording material having excellent acceptability for a heat-meltable ink transferred from a transfer ribbon, capable of forming a high-quality image, and excellent in printer running property. It is a thing.

[0002]

2. Description of the Related Art With the progress of office automation in recent years, copying machines, printers, facsimiles, etc., which utilize various recording methods such as electrophotographic methods and thermal transfer recording methods, have come to be widely used according to their respective applications. There is. A colored coloring material is used for this image formation, and usually, the coloring material is melted, evaporated and sublimated and transferred onto a recording medium such as a paper or film sheet to obtain a recorded image by adhesion, adsorption or dyeing action. ing.

In this type of recording system, a heat-melting ink type ink ribbon or ink sheet having an image forming layer is melted by heating with a thermal head and a coloring material is transferred to a recording medium to obtain a recorded image. The thermal transfer recording method has recently been drawing attention. This system is characterized in that plain paper can be used as the recording paper.

However, in this thermal transfer recording system, as in the other recording systems, there are strong demands for full-color recording, high-speed recording, high-definition image, high resolution, etc., and plain paper cannot be satisfied. For example, when performing multicolor recording with a color thermal transfer printer or the like, yellow, magenta, cyan,
A color material such as black, an ink ribbon containing waxes or resins, and a recording medium are combined and heated by a thermal head to form a transferred image on the recording medium. In the case of full-color multi-color recording, the ink of each color overlaps, so if plain paper is used as the recording paper, defects such as uneven transfer and missing dots may occur due to the smoothness of the ink receiving layer surface and ink acceptability. It is easy to occur and becomes a difficulty.

For this reason, as a method for improving the surface smoothness of the recording paper, a method in which Beck's smoothness is set in a specific range (Japanese Patent Laid-Open No. 60-110488), a thermal transfer receiving layer containing a specific pigment and a binder. (Japanese Patent Laid-Open No. 60-110489, Japanese Patent Laid-Open No. 60-110490)
Gazette) is already known. However, the deterioration of image sharpness due to transfer unevenness or color misregistration at overlapping portions of color inks in multicolor recording, missing of transfer ink dots, poor dot shape reproducibility, and the like has not been completely eliminated. Therefore, it is not enough to simply increase the smoothness by a smoothing treatment or to add a pigment or a binder to the thermal transfer receiving layer.

Conventionally, in full-color recording of the fusion type thermal transfer recording system, a line type thermal head has been widely used because high-speed printing is possible, and a serial type thermal head is mainly used in the field of monochrome printing of a word processor or the like. However, in recent years, along with the expansion to personal applications, there has been a demand for smaller and lighter printers, lower prices, etc., and in the field of full-color recording, a method using the serial method has been developed. There is.

In full-color recording by the above-mentioned fusion type thermal transfer recording system, in the case of a conventional receiving paper provided with an ink receiving layer containing a pigment or a binder as a main component, a white paper portion or a recording portion is easily stained. However, it is difficult to obtain a desired recorded image. Such a phenomenon remarkably occurs particularly when printing is performed in a high temperature and low humidity environment. There is a strong demand for a recording paper that eliminates such drawbacks, has excellent dot reproducibility, and can obtain a high-quality recorded image.

[0008]

DISCLOSURE OF THE INVENTION The present invention has an excellent receptivity for a hot-melt ink transferred from a transfer ribbon, can form a high-quality image, and is excellent in printer running property. It is intended to provide a recording material.

[0009]

Means for Solving the Problems A recording material according to the present invention has a sheet-shaped substrate and an image forming layer containing a thermoplastic resin as a main component on at least one surface thereof. To contain a P element-containing compound.

The content of the P element in the elements existing in the outermost layer portion of the image forming layer measured by the XPS method is preferably 0.2 to 5%, and the P element-containing compound is It is preferably a phosphate ester type surfactant. Further, it is preferable that the image forming layer has a surface electric resistance value of 5 × 10 ¹⁴ Ω or less at 23 ° C. and 50% RH. Further, it is preferable that the thermoplastic resin is a polyester resin.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have determined the adhesive force between a heat-meltable ink and a recording material on the surface of an image-forming layer on the recording material when re-transferring of color heat-melting ink or color loss occurs. As a result of examination from the physical properties of the above, by adjusting the content rate of P element to 0.2 to 5% in the elements existing in the outermost surface layer portion having a depth of about 10 nm from the outermost surface of the image forming layer, They have found that the points can be greatly improved, and have completed the present invention. Hereinafter, the present invention will be specifically described.

The present inventors have examined the color loss due to the retransfer of the heat-meltable ink to the ink ribbon generated between the recording material and the heat-meltable ink, the ink receiving property, and the printer running property. In the element existing in the outermost layer portion of the image forming layer, the content of the P element is within the predetermined range, so that the ink has excellent acceptability for the hot-melt ink.
The inventors have found that a high-quality image can be formed and have excellent printer runnability, and have completed the present invention.

That is, in the present invention, the content of P element is 0.2 to 5% in the element existing in the outermost surface layer portion having a depth of about 10 nm from the outermost surface in the image forming layer of the recording material. By thus adjusting the image forming layer, a water adsorption layer is provided on the surface layer portion of the image forming layer, and the image forming layer exhibits conductivity depending on the environment. When the content of P element is less than 0.2%,
Printer runnability is reduced. Further, particularly in a low humidity environment, a running defect such as a paper jam may occur due to peeling charge from the feed roll in the printer. On the other hand, when the P element content exceeds 5%, the amount of water adsorbed to the image forming layer of the recording material is large, and particularly in a high humidity environment, the transfer efficiency of the heat-meltable ink onto the recording material is high. May significantly decrease, resulting in color loss, deterioration in image quality density, blocking, turbidity of the image forming layer, and the like.

The P element contained in the image forming layer is a surfactant containing the P element, and is, for example, lauryl phosphoric acid, lauryl ether phosphoric acid, alkylphenol ether phosphate ester, phenol ether phosphate ester, alkyl ether phosphate. Acid ester, sodium alkyl ether phosphate, potassium polyoxyethylene alkyl ether phosphate, diethanolamine alkyl phosphate, polyoxyethylene alkyl phosphate ester, polyoxyalkylene alkyl phenyl ether phosphate ester, monostearyl phosphate ester Examples include ethanolamine, dioctyl phosphate monoethanolamine, trilauryl phosphate triethylamine, and the like.

The above-mentioned P element-containing compounds are used alone or in combination of two or more kinds in the coating liquid for the image forming layer. Alternatively, it may be coated on the image forming layer with a P element-containing compound coating liquid and dried. If necessary, curl straightening treatment may be performed.

The alkyl group of the surfactant preferably has 3 to 20 carbon atoms, and more preferably 8 to 18 carbon atoms. The molecular weight is
150-2000 are preferable and 200-800 are more preferable.

Since the uneven distribution of the surfactant in the image forming layer varies depending on the coating method, coating conditions, drying conditions, curl correction conditions, etc. of the coating liquid, The amount added is not particularly limited. That is, the content of the P element in the element existing in the outermost surface layer portion having a depth of about 10 nm from the outermost surface in the image forming layer is 0.2 to 5 after coating, drying or, if necessary, curling. % Is included in the coating liquid for the image forming layer.
However, it is desirable that the agglomeration with the thermoplastic resin, which is the main component in the coating liquid for the image forming layer, and the image forming layer do not cause problems such as deterioration of the gloss and transparency of the coating film. The compounding amount of the agent is in the range of 0.3 to 5% by mass based on the thermoplastic resin for image forming layer, and 0.4 to 2% by mass.
Is preferred.

When the P element-containing coating liquid is applied onto the image forming layer, the depth from the outermost surface in the image forming layer is about 1
Adjust appropriately according to the coating amount, coating method, coating conditions, drying conditions, curl straightening conditions, etc., so that the P element content in the outermost layer of about 0 nm is 0.2 to 5%. To do.

When the coating amount of the image forming layer exceeds 30 g / m ² , the glossiness, transparency and blocking of the image forming layer may be deteriorated, and the coating amount is 3
It is preferably 0 g / m ² or less.

The inventors of the present invention have been able to improve the uneven glossiness of the image due to the unevenness of the heat-meltable ink and obtain an image quality comparable to that of a silver salt photograph. As a result of diligent examination of the sheet characteristics of the recording material, it has been found that a high-quality image can be obtained without unevenness in gloss due to the unevenness of the hot-melt ink in the image, and the present invention has been completed. Hereinafter, the present invention will be specifically described.

The heat-meltable ink transferred to the image forming layer on the recording material is heated by the thermal head of the ink ribbon.
It is melted and transferred and fixed on the image forming layer. When the heat-meltable ink is not embedded in the recording material, the gloss varies depending on the thickness of the heat-meltable ink, resulting in a marked deterioration in image quality. Therefore, in order to eliminate gloss unevenness, it is important to embed the heat-meltable ink in the image forming layer. That is, in order to embed the heat-meltable ink, it is important that the heat-meltable ink is sufficiently melted by heating for a short time, the thermoplastic resin is also softened, and is compatible with the heat-meltable ink. As a result of diligent studies, it has become clear that the glass transition temperature of the thermoplastic resin is preferably in the range of 30 to 85 ° C.

The glass transition temperature of the thermoplastic resin is 3
If the temperature is lower than 0 ° C, the blocking resistance may be poor, and problems such as sticking to a fixing roll may occur during fixing of the hot-melt ink. On the other hand, if the temperature exceeds 85 ° C., the image forming layer may not be sufficiently softened during transfer / fixing, and the heat-meltable ink may not be embedded sufficiently. When the molecular weight (Mn) exceeds 200,000, the softening of the image forming layer during heating is insufficient, so that the embedding of the heat-meltable ink may be insufficient. On the other hand, the molecular weight (M
When n) is less than 5000, cracking may occur due to insufficient formation of the coating film for the image forming layer.

As the thermoplastic resin constituting the image forming layer, polyolefin resins such as polyethylene and polypropylene: polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyacrylic ester, Polyvinyl-based resins such as polyvinyl acetal and polystyrene: polyethylene terephthalate,
Polyester resins such as polybutylene terephthalate:
Polyamide resin: Copolymer resin of olefin such as ethylene and propylene and other vinyl monomer: ionomer resin and phenoxy resin. Particularly preferably, an inexpensive styrene-acrylic copolymer or a highly transparent polyester resin is used.

Examples of the polyhydric alcohol component and the polycarboxylic acid component which compose the polyester resin include the following. As the polyhydric alcohol component, ethylene glycol, propylene glycol, 1,4-butanediol, 2,3-butanediol, diethylene glycol,
Triethylene glycol, 1,5-pentanediol,
It is possible to use 1,6-hexanediol, neopentylene glycol, 1,4-cyclohexanedimethanol, dipropylene glycol, polyethylene glycol, polypropylene glycol, a monomer obtained by adding olefin oxide to bisphenol A, or the like. As the polycarboxylic acid component, maleic acid, maleic anhydride,
Fumaric acid, phthalic acid, terephthalic acid, isophthalic acid, malonic acid, succinic acid, glutaric acid, dodecenylsuccinic acid,
n-octyl succinic acid, n-dodecenyl succinic acid, 1,
2,4-benzenetricarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid, 1,2,4-naphthalenetricarboxylic acid, 1,2,5-hexanetricarboxylic acid,
1,3-dicarboxy-2-methyl-2-methylenecarboxypropane, tetra (methylenecarboxy) methane, 1,2,7,8-octanetetracarboxylic acid, trimellitic acid, pyromellitic acid and lower of these acids An alkyl ester or the like can be used.

In the present invention, the polyester resin is synthesized by using one or more of the above-mentioned polyhydric alcohol component and polycarboxylic acid component from each component. Further, since the polyester resin and the styrene-acrylic resin are the main components of the hot-melt ink, it is preferable to select a resin composition having high compatibility with the hot-melt ink. Therefore, one kind or a mixture of two or more kinds selected from polyester resins, styrene-acrylic acid ester resins, styrene-methacrylic acid ester resins and the like is used.

Further, the image forming layer may contain a pigment, a release agent, a conductive agent and the like within a range that does not impair the effects of the present invention. In that case, the amount of the thermoplastic resin as the main component is 80 mass% with respect to the total solid content of the resin composition for the image forming layer.
It is necessary to be above.

The coating of the coating liquid for the image forming layer containing a surfactant on the substrate and the coating of the surfactant on the outermost surface of the image forming layer are the coating methods for forming the image forming layer. As
A generally known coating apparatus, for example, a reverse roll coater, a bar coater, a curtain coater, a die slot coater, a gravure coater, a flexographic printing machine, a silk screen machine, or the like is appropriately used. The thickness of the image forming layer is
After drying, it is 0.5 to 30 μm. By the way, if the thickness of the image forming layer is less than 0.5 μm, the hot melt ink is insufficiently embedded and uniform gloss in the image area cannot be obtained. On the other hand, 3
When it exceeds 0 μm, the heat-fusible ink is embedded in the image forming layer, the unevenness of the image area is eliminated, and the gloss feeling is good, but the recording material is easily stuck to the feed roll of the printer.

On the surface of the recording material, in order to obtain an image quality as good as a silver salt photograph, JIS Z
It is preferable that the white paper glossiness at an incident / light receiving angle of 75 degrees measured according to 8741 is 80% or more.
It is preferable that the maximum roughness Rmax measured according to SK 0601 is 15 μm or less, coating of a coating liquid for an image forming layer containing a surfactant, and / or a surfactant on the outermost layer of the image forming layer. If desired, the recording material coated with can be smoothed after coating. It can be performed with a smoothing processing device such as a normal super calender, a gross calender, a soft calender or the like. Further, the form of the pressurizing device, the number of pressurizing nips, heating, etc. are appropriately adjusted in accordance with a normal smoothing device.

Furthermore, as a result of visually confirming the gloss uniformity and three-dimensional roughness (roughness) of the image portion, the smaller the three-dimensional roughness of the image portion due to the unevenness due to the heat-melting ink, the more the gloss uniformity of the image portion. Was found to be good. The color heat-meltable ink image formed on the image forming layer is fixed by a pressure / heating roller or the like, and the color heat-meltable ink image after being fixed has a thickness exposed from the image forming layer. Regarding the unevenness of a certain image portion, according to the present invention, JIS K 06
In the measurement of the surface roughness by the measuring method according to 01, the maximum roughness Rmax is preferably 30 μm or less, more preferably 20 μm or less.

The sheet-like base material used for the base material of the present invention is not particularly limited and may be general printing such as high-quality paper, coated paper (coated paper, art paper, cast coated paper, etc.) depending on the application. Paper), synthetic paper, laminated paper (synthetic paper / synthetic paper or high-quality paper, coated paper / synthetic paper lamination), polyolefin laminated paper, non-woven fabric, and synthetic resin film can also be used.

The high-quality paper contains, for example, an acidic paper produced by adjusting the pH of the papermaking pulp slurry to about 4.5 and an alkaline filler such as calcium carbonate as a main component, and the pH of the papermaking pulp slurry is about 6. A paper substrate made of neutral paper or the like manufactured by adjusting the acidity from weak acidity to weak alkalinity of about 9 is used. As a papermaking method, a general long-mesh multi-cylinder type, circular-net single-cylinder type, Yankee type, or the like is appropriately used. Further, chemical pulp fibers can be appropriately blended in the pulp used in the high-quality paper, the coated paper, and the laminated paper.
Further, mechanical pulp such as SGP, RGP, BCTMP, CTMP, so-called chlorine-free pulp such as used paper pulp, ECF pulp and TCF pulp, or kenaf, bamboo,
Non-wood pulp such as straw and hemp, organic synthetic fibers such as polyamide fiber and polyester fiber, and further glass fiber,
Inorganic fibers such as ceramic fibers and carbon fibers can also be used.

The recording material of the present invention is used in a printer,
In order to prevent winding around the feed roll, when the desired surface electric resistance cannot be obtained, when an intermediate layer is provided on the surface of the sheet-shaped substrate or on the sheet-shaped substrate, the intermediate layer and the image are formed. A conductive layer may be provided between the layer and the forming layer, and has a surface electric resistance value of 5 × under a high humidity to low humidity environment.
It is preferably adjusted to be 10 ¹⁴ Ω or less.

The conductive layer is, for example, a conductive metal oxide.
Examples include those in which fine particles are dispersed in a binder resin. Guide
The conductive metal oxide fine particles include ZnO and TiO._Two, S
nO _Two, SiO_Two, Al_TwoO_Three, MgO, MoO_Three, C
oO, In_TwoO_ThreeAnd so on. these
May be used alone or in combination with these composite oxides.
May be used. As the metal oxide, different elements
Is preferably contained in, for example, ZnO
Then contains Al, In, etc., TiO_TwoFor N
Contains b, Ta, etc., or SnO_TwoFor Sb,
Including (doping) Nb, halogen element, etc.
Is preferred. Of these, Sb-doped S
nO_TwoIs particularly preferable. In addition, these conductive metal oxides
The particle size of the particles is preferably 0.2 μm or less.
The binder resin for the conductive layer is polyvinyl alcohol.
, Polyacrylic acid, polyacrylamide, polyhydro
Xyethyl acrylate, polyvinylpyrrolidone, water soluble
-Soluble polyester, water-soluble polyurethane, water-soluble nylon
Water-soluble epoxy resin, gelatin, hydroxyethyl
Cellulose, hydroxypropyl cellulose, carboxy
Water-soluble such as dimethyl cellulose and derivatives
Polymer: Water-dispersed acrylic resin, water-dispersed polyester
Which water dispersion type resin: acrylic resin emulsion, poly vinegar
Vinyl acid emulsion, SBR (styrene-butadiene
Emulsion such as rubber) emulsion: acrylic resin
Examples of organic solvent-soluble resins such as fats and polyester resins
You can Above all, water-soluble polymers and water-dispersible resins
And it is preferable to use an emulsion. Further world
A surface active agent may be added. In addition, the formation of the conductive layer
It can be performed in the same manner as the method for forming the image forming layer.
It

The image-forming layer is formed on one side or both sides of the sheet-like substrate, and the image-forming layer may have a single layer or, if necessary, two or more intermediate layers to have a multi-layer structure. is there. In the case of a double-sided coating or a multi-layer structure, each coating liquid does not have to have the same or the same coating amount, and may be appropriately adjusted and set according to the required quality level, and is not particularly limited. Not something. When an image forming layer is provided on one side of the sheet-shaped substrate, a synthetic resin layer, a coating layer made of a pigment and an adhesive, an antistatic layer, etc. are provided on the back side to prevent curling, impart printability, and supply / discharge. It is also possible to impart paper suitability and the like. Further, various processing on the back surface of the sheet-shaped substrate, for example, adhesion, magnetism, flame retardancy, heat resistance, water resistance,
Needless to say, it is possible to use it after adding post-processing such as oil resistance and anti-slip to add suitability for use.

The recording material obtained according to the present invention can be preferably used not only for recording by a thermal fusion transfer recording system but also as an image recording paper of non-impact printing system such as electrophotographic recording system and ink jet recording system. Further, it can be preferably applied to print-on-demand use (also called POD use).

[0036]

The present invention will be described in more detail below with reference to examples, but of course the present invention is not limited to these ranges. In addition, "parts" and "%" in the examples mean "parts by mass" and "% by mass" unless otherwise specified.

Example 1 [Preparation of support] LBKP (freeness (CSF) = 4)
(80 ml) 100 parts of pulp slurry, 10 parts of talc as a filler, 1.5 parts of rosin emulsion sizing agent, 2 parts of sulfuric acid band were added, and the mixture was diluted with white water to have a pH of 5.3 and a solid content concentration of 1. A 1% stock was prepared.
This stock was made with a Fourdrinier paper machine, and then the oxidized starch (trade name: Ace A, made by Oji Cornstarch) had a liquid concentration of 6%.
The size press liquid is coated with a dry weight of 2.0 g / m 2.
^It was applied by a size press machine so as to be ² , dried, and smoothed by a machine calender to have a smoothness of 50 seconds / 10 ml to obtain a support having a basis weight of 128 g / m ² .

[Preparation and coating of coating liquid] Kaolin (average particle size: 0.3 μm, trade name: UW-90 manufactured by Engelhard) 60 parts (solid content: the same below), light calcium carbonate ( Average particle size 0.6 μm Product name: TP1
23CS Okutama Kogyo Co., Ltd.) 30 parts, heavy calcium carbonate (average particle size 0.5 μm, trade name: Hydrocurve K9
To 10 parts of Bihoku Powder Co., Ltd., 0.2 parts of polysodium acrylate (trade name: Aron A-9 manufactured by Toa Gosei Co., Ltd.) as a dispersant (solid content ratio to pigment: the same applies hereinafter). In addition, a Choles disperser was used to disperse in water to prepare a pigment slurry. 3.5 parts of oxidized starch (trade name: Ace A, manufactured by Oji Corn Starch Co.) in this pigment slurry,
Styrene-butadiene copolymer latex (trade name: T
2550K manufactured by JSR Co., Ltd.) was added and stirred, and water was further added to prepare a coating liquid having a solid content concentration of 60%.

[Formation of Coating Layer on Support] The obtained coating liquid is applied on one side of the above support using a blade coater so that the dry weight is 20 g / m ^2, and both sides are coated. Pass the paper through a pressure nip composed of a metal roll and an elastic roll,
Adjusted so that the white paper glossiness at an incident / light receiving angle of 75 degrees based on JIS Z 8741 is 70%, and the basis weight is 16
A sheet-shaped base material of 8 g / m ² was obtained.

[Formation of Image-Forming Layer on Sheet-Shaped Substrate] On one side of the obtained sheet-shaped substrate, a polyester resin having the following composition was used in an amount of 10 g / m ² (absolute dry mass) using a gravure coater. It was applied so that After coating the image forming layer, the back side is coated with water using a bar coater at 8 g / m ² and dried,
Curling treatment was performed. 100% white paper glossiness with an incident / light receiving angle of 75 degrees based on JIS Z 8741
The maximum roughness Rmax based on SK 0601 is 5.0μ
It was m. [Preparation of coating liquid for image forming layer] Polyester resin (trade name: TP220, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) 100 parts (molecular weight Mn: 16000, glass transition temperature: 70 ° C) Surfactant (trade name: Prysurf) A-212E manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) 0.6 part (composition: polyoxyalkylene alkylphenyl ether phosphate, molecular weight: 660) Diluting solvent: toluene

[Evaluation of Recording Material] The obtained recording material was
The evaluation was performed using MD5000 (manufactured by Alps Electric Co., Ltd.). The blank physical properties and the evaluation results are shown in Tables 1 to 4.

Example 2 A recording material was prepared and evaluated in the same manner as in Example 1 except that the surfactant was changed to the following. The results are shown in Table 1.
~ 4. Surfactant (Product name: Prysurf A-2
17E Daiichi Kogyo Seiyaku Co., Ltd.) 0.6 part (composition: polyoxyalkylene alkylphenyl ether phosphate, molecular weight: 1200)

Examples 3 to 4 Same as Example 1 except that the compounding amount of the surfactant was changed to 0.8 parts (Example 3) and 1.2 parts (Example 4). A recording material was prepared and evaluated. The blank physical properties and the evaluation results are shown in Tables 1 to 4.

Example 5 A recording material was prepared and evaluated in the same manner as in Example 1 except that the thermoplastic resin was changed to the following. The blank physical properties and the evaluation results are shown in Tables 1 to 4. Styrene-acrylic copolymer resin (trade name: Iodosol G
D86B manufactured by NSC Japan, molecular weight Mn: 100,000, glass transition temperature: 60 ° C.)

Comparative Example 1 A recording material was prepared and evaluated in the same manner as in Example 1 except that the surfactant was not mixed in the preparation of the coating liquid for the image forming layer of Example 1. The blank physical properties and the evaluation results are shown in Tables 1 to 4.

Comparative Example 2 A recording material was prepared in the same manner as in Example 1 except that the formulation amount of the coating liquid for the image forming layer of Example 1 was changed to 6.0 parts of the surfactant. ,evaluated. The blank physical properties and the evaluation results are shown in Tables 1 to 4.

Comparative Example 3 A recording material was prepared and evaluated in the same manner as in Example 1 except that the surfactant was changed to the following in the preparation of the coating liquid for the image forming layer of Example 1. The blank physical properties and the evaluation results are shown in Tables 1 to 4. Surfactant (trade name: Cationogen ESL manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 0.6 part (composition: N, N, N, N-tetraalkyl quaternary ammonium salt, molecular weight: 370)

The measuring method and quality evaluation are shown below.

(Surface Physical Properties of Image Forming Layer, See Table 2 for Results) (1) Method of Measuring P Element Abundance The surface abundance ratio of P element used for adjusting the FFM signal difference in the present invention is measured by XPS method. It is what is done. The measurement principle of the XPS method is to irradiate an element with X-rays and quantitatively and qualitatively detect the kinetic energy of unique free electrons emitted from the element. Due to the characteristics of the measurement principle, it is a method of measuring the constituent elements on the outermost surface of a solid to a surface of about 10 nm, and it does not measure the entire thickness direction of the measurement target (Surface Analysis Encyclopedia, Japan Society for Surface Science, published by the academic society). Center, pp. 124-125, X-ray photoelectron spectroscopy). Evaluation of Surface P Element Presence Rate by XPS Device The presence ratio of P element on the surface of the image forming layer of the recording material was measured and evaluated by ESCA LAB250 manufactured by VG Scientific. The X-ray source used is magnesium, the accelerating voltage of the X-ray source is 15 kV, and the emission current is 20 mA, and qualitative and quantitative determination is performed for all elements having binding energy in the measurement range of 10 to 1100 eV, and the ratio of P element to those elements. Was determined in terms of the number of atoms. The measurement depth was about 10 nm, and the measurement range was about 8 mmφ. (2) Surface electric resistance value In accordance with JIS K 6911, the sample is
The humidity was controlled for 8 hours or more in the environment, and under the same environment, R8340 manufactured by Advantest was used, and the current was applied under the condition of an applied voltage of 100 V for 1 minute, and then the measurement was performed. Measurement environment High humidity: 28 ° C, 85% RH, ISO: 23 ° C, 50
% RH, low humidity: 10 ° C., 30% RH (3) White paper glossiness The glossiness at an incident angle / acceptance angle of 75 ° based on JIS Z 8741 was measured. (Measuring equipment: Product name GLOSS METER MO
DEL G / M26D (manufactured by MIRAKAMI Color Research Laboratory) (4) Surface roughness The maximum roughness Rmax based on JIS K 0601 was measured. The maximum roughness Rmax was measured using a stylus type surface roughness meter. (Measuring equipment: surf coder, made by Kosaka Laboratory)

(Refer to Table 2 for the evaluation method of the recording quality and the result) (1) Concavo-convex image area An image was output to each of the recording materials of Examples and Comparative Examples by using a surf coder manufactured by Kosaka Laboratory Ltd. The height of the heat-fusible ink in the formed image area was measured by a method based on JIS K0601. The evaluation method is as follows. The white paper portion and the hot-melt ink portion (process black) of the printed product were simultaneously scanned, and the maximum height Rmax of the hot-melt ink portion from the white paper portion was read from the chart. (2) Gloss uniformity Using an MD5000 manufactured by Alps Electric Co., an image was output on each of the recording materials of Examples and Comparative Examples, and the image quality of the obtained image area was visually evaluated. The judgment criteria are as follows. Recording environment: 23 ° C., 50% RH ⊚: There is no unevenness in the image area and the blank area, and the gloss uniformity is excellent. ◯: The image part and the white paper part have a slight unevenness, but the gloss uniformity is good. There is no problem in practical use. Δ: The image area and the white paper area have unevenness, and the gloss uniformity is poor. There is a problem in practical use. X: The image area and the white paper area have a remarkable unevenness, and the gloss uniformity is extremely poor. There is a problem in practical use.

(Evaluation of retransfer and running property, results are shown in Tables 3 and 4) (1) Evaluation of retransfer of hot-melt ink (see Table 3 for results) 28 ° C using MD5000 manufactured by Alps Electric Co., Ltd. , 8
5% RH, 23 ° C, 50% RH, 10 ° C, 30% R
Recording under an H environment, visual evaluation of the removal of the heat-meltable ink due to retransfer of the heat-meltable ink on the image forming surface, and the state of the heat-meltable ink removal is visually evaluated according to the following evaluation criteria. did. ⊚: Extremely excellent with no loss of heat-meltable ink. ◯: There is almost no omission of the heat-meltable ink, which is good. Δ: The heat-meltable ink is missing and slightly inferior. X: Many hot melt inks are missing and inferior. (2) Evaluation of runnability (see Table 3 for results) Using MD5000 manufactured by Alps Electric Co., 28 ° C., 8
5% RH, 23 ° C, 50% RH, 10 ° C, 30% R
Recording was carried out in the H environment, and the number of times of paper feed failure and paper discharge failure of the recording material and paper jam in the printer were evaluated. The number of printed sheets in each environment was 100, and the number of double feeds and paper jams were measured and evaluated according to the following evaluation criteria. A: The number of occurrences of double feeding and paper jam is 0. There is no problem in practical use and the quality is excellent. ○: The number of occurrences of double feeding and paper jam is 5 times or less. There is no problem in practical use. Δ: The number of occurrences of double feeding and paper jam is 5 to 10 times. There is a problem in practical use. X: The number of occurrences of double feeding and paper jam is 10 or more. There are practical problems and the quality is extremely poor. (3) Evaluation of blocking (see Table 4 for results) The receptive surface and the back surface, and the receptive surface and the receptive surface were bonded together, and 28
℃, 85% RH, 23 ℃, 50% RH, 10 ℃, 3
Under a 0% RH environment, a load of 50 g / cm ² was applied for 24 hours, and the sticking state of the recording material was evaluated. A: Good with no peeling noise. There is no problem in practical use. ◯: There is some peeling sound, but peeling is not observed. There is no problem in practical use. Δ: There is peeling sound and peeling is also observed. There is a problem in practical use. X: Sticking is remarkable and it does not peel off. Not practically usable.

[0052]

[Table 1]

[0053]

[Table 2]

[0054]

[Table 3]

[0055]

[Table 4]

[0056]

As is clear from the examples in Tables 1 to 4, the recording material according to the present invention has excellent receptivity to the heat-meltable ink transferred from the transfer ribbon,
It can form high-quality images and excels in printer runnability, which is a major contribution to the industry.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H111 AA16 AA26 CA03 CA12 CA30                       CA33 CA41 CA46

Claims (5)

[Claims] 1. A recording material having a sheet-like base material and an image forming layer containing a thermoplastic resin as a main component on at least one surface thereof, wherein the image forming layer contains a P element-containing compound. Recording material to be. 2. The recording material according to claim 1, wherein the content of the P element in the elements existing in the outermost layer portion of the image forming layer measured by the XPS method is 0.2 to 5%. 3. The recording material according to claim 1, wherein the P element-containing compound is a phosphoric acid ester-based surfactant. 4. The image forming layer, 23 ° C., 50% RH
The recording material according to any one of claims 1 to 3, which has a surface electric resistance of 5 × 10 ¹⁴ Ω or less. 5. The recording material according to claim 1, wherein the thermoplastic resin is a polyester resin.