JP2001277715A - Recording body, intermediate transferring body and image forming device using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high image stability by a method wherein the spreading of ink to a non-image part by pressure is effectively prevented from developing. SOLUTION: In the recording layer 12 of a recording body 10, projections 12a having a height of 15 μm, for example, is provided so as to serve as a hindrance against the adhesion between the recording body 10 and an intermediate transferring body 20 or between the recording body 10 and a recording medium (not indicated). Concretely, the pressure between the recording body 10 and the intermediate transferring body 20 (or the recording medium) is reduced, resulting in allowing to prevent the spread of ink to the non-image part by the pressure from developing. The thickness of ink applied on the recording body 10 is ordinarily several μm and at the same time, since the intermediate transferring body 20 or the recording medium is somewhat elastic, no poor transfer of images due to the projections 12 can develop. The projections may well be provided on the intermediate transferring body side. Further, by employing a porous material or an elastic body material as the recording body or the intermediate transferring body, the same effect as mentioned above can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium and an intermediate transfer body applied to a printing machine, a printer, and the like, and an image forming apparatus using the same, and more specifically, to ink fixing during or after image formation. In image stabilization technology.

[0002]

2. Description of the Related Art In an image forming apparatus such as a printing machine, an image is formed by applying ink on a recording medium and then directly transferred to a recording medium, or once transferred to an intermediate transfer medium and then further transferred to the recording medium. The image is formed by transferring. Further, the recording medium proposed in Japanese Patent Application Laid-Open No. 8-2766663 is a perfect lithographic plate due to its characteristics. Therefore, when an image is transferred to an intermediate transfer body or a recording medium after development, ink flows due to the pressure of the recording medium. The ink spreads and comes into contact with the non-image portion. Further, in the image forming method proposed in Japanese Patent Application Laid-Open No. 8-2766663, the contact angle at the boundary between the image portion and the non-image portion changes gradually. Since the image density is lower than that of the portion, the image is likely to be fat.

On the other hand, when transferring from a developed recording medium to a recording medium or an intermediate transfer body, it is necessary to obtain a sufficient dot gain between the recording medium and the recording medium or between the recording medium and the intermediate transfer body. Since the peripheral speed difference is set slightly, slight frictional heat is generated. Therefore, the non-image portion near the image portion is in the liquid contact heating state, and the receding contact angle is reduced. When such a phenomenon occurs repeatedly, the receding contact angle near the image portion gradually decreases, and the image portion enlarges.

A recording medium changes its surface morphology even with slight heat, and requires a sufficient temperature and time in contact with a liquid to make it hydrophilic, and there is a correlation between them. It has been known. Similarly, in order to obtain a water-repellent state, it is necessary to spend a sufficient temperature and time in a state of non-contact with a liquid. In other words, even a small amount of heat can cause a state change by heating for an appropriate period of time, and the above-described phenomenon is caused as a result.

FIG. 14 is a schematic view of a main part for explaining an example of image formation using a conventional recording medium. In FIG. 14, reference numeral 10 denotes a recording medium, 10a denotes an image portion of the recording medium, and 10b denotes a recording medium. A non-image portion, 20 is an intermediate transfer member, and 30 is ink. In a general printing press, in order to sufficiently secure image density, a member to which the recording body 10 is attached (hereinafter, referred to as a plate cylinder) and a member to which the intermediate transfer body 20 is attached (hereinafter, a blanket cylinder). ) Is intentionally provided with a peripheral speed difference. That is, rubbing occurs between the recording body 10 and the intermediate transfer body 20, or between the recording body 10 and a recording medium (not shown), and a slight amount of frictional heat is generated on the surface of the recording body 10. The ink 30 is applied on the image formed on the recording medium 10. Since the recording medium is a perfect planographic image, the ink 30 is applied by the pressure when it comes into contact with the intermediate transfer body 20 or a recording medium (not shown). Flows and spreads, and the ink 30 flows in the non-image area 10 around the image area 10a.
b.

In a recording method using the recording medium 10,
The above-mentioned phenomena can easily occur, and if these occur simultaneously, the non-image portion 10 around the image portion 10a
b is heated in a liquid contact state, and its contact angle is reduced. Of course, the decrease in the contact angle in one process is very small, but by repeating this process several hundred times or more, the contact angle decreases as the ink adheres. That is, this means that the image portion 10a gradually expands, and such a phenomenon is one factor that limits the print-resistant characteristics of the present recording medium.

In order to avoid the above-mentioned problems, it is conceivable to reduce the peripheral speed difference between the plate cylinder and the blanket cylinder. However, in this case, a sufficient dot gain is not ensured, which affects the image quality. It is not an appropriate method.

In view of such circumstances, as a prior art invented by the present inventors and filed by the same person as the present application, a recording apparatus disclosed in Japanese Patent Application No. 10-51655 and a recording apparatus disclosed in Japanese Patent Application No. 11-322554 are disclosed. There is an image forming method and apparatus.
Japanese Patent Application No. 10-51655 proposes a method for reducing frictional heat generated on the surface of a recording medium, but does not make any mention of a receding contact angle near an image portion. In Japanese Patent Application No. 11-322554, a method is proposed in which the receding contact angle near the image area is increased to suppress the enlargement of the image area. As long as occurs, the enlargement of the image portion is inevitable and cannot be a fundamental solution.

That is, the above-mentioned Japanese Patent Application No. 10-51655.
In Japanese Patent Application Laid-Open No. H11-264, a method of reducing frictional heat generated on the surface of a recording medium has been proposed, but there is no description regarding a receding contact angle near an image portion. In addition, since it is inevitable to cool the ink 30 applied on the recording medium 10 as well, the physical properties (viscosity and the like) of the ink 30 change, and a sufficient dot gain may not be obtained. Further, the recording body 10
Since the above frictional heat is generated instantaneously, there is a high possibility that a sufficient cooling effect cannot be obtained.

On the other hand, Japanese Patent Application No. 11-322554 mentioned above proposes a method in which the receding contact angle near the image area is increased to suppress the enlargement of the image area. In addition, as long as frictional heat is generated on the recording medium, enlargement of the image area is inevitable, and cannot be a fundamental solution. That is, since no countermeasures have been taken with respect to frictional heat on the recording medium and spread of the ink, the effect is merely to extend the printing resistance, and cannot be a fundamental technical solution.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a recording medium and an intermediate transfer having means for effectively preventing ink from spreading to a non-image area due to pressure. It is an object of the present invention to provide a body and an image forming apparatus capable of obtaining high image stability by using these.

[0012]

According to the first aspect of the present invention, the receding contact angle decreases when heated in a state of contact with a liquid, and the liquid shows a lyophilic property to a liquid such as ink (a lyophilic state). And, in a recording medium having a surface characteristic in which the receding contact angle increases when heated in a non-contact state with a liquid, the recording medium is used for transferring an image to an intermediate transfer body or a recording medium.
An ink flow preventing unit that prevents or reduces ink from flowing to a non-image forming portion due to a transfer pressure generated between the recording body and the intermediate transfer body or between the recording body and the recording medium. It is characterized by.

According to a second aspect of the present invention, in the first aspect of the invention, the height of the recording surface is 5 μm
It is characterized by having at least 10 ³ projections per 1 mm ² .

According to a third aspect of the present invention, in the first aspect of the present invention, a porous recording layer is provided as the ink flow preventing means.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the ink flow preventing means has an elastic recording layer.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the recording body includes a substrate and a recording layer, and the substrate has elasticity.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the recording body comprises a substrate, an intermediate layer, and a recording layer, and the intermediate layer has elasticity.

According to a seventh aspect of the present invention, there is provided a configuration having an arbitrary combination of a plurality of the configurations of the second to sixth aspects.

According to an eighth aspect of the present invention, a recording medium according to any one of the first to seventh aspects is used.

According to the ninth aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with the liquid, the liquid becomes lyophilic with respect to a liquid such as ink (an ink-philic state), and the liquid does not contact the liquid. An intermediate transfer member for transferring an image from a recording member having a surface characteristic in which a receding contact angle increases when heated in a state, wherein the intermediate transfer member has a Young's modulus of 10 ⁶ N / m ² or less. It is what it was.

According to the tenth aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with the liquid, and the liquid becomes lyophilic to a liquid such as ink (a state of lyophilic ink). An intermediate transfer body for transferring an image from a recording medium having a surface characteristic in which a receding contact angle increases when heated in a state, wherein the intermediate transfer body has a height of 5 μm or more and
It is characterized by having not less than 10 ³ protrusions per mm ² .

According to the eleventh aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with the liquid, and the liquid becomes lyophilic with respect to a liquid such as ink (a state of lyophilic ink). An intermediate transfer body for transferring an image from a recording medium having a surface characteristic in which a receding contact angle increases when heated in a state, wherein the intermediate transfer body has a porous shape on its surface. .

The twelfth aspect of the present invention provides the ninth to eleventh aspects.
Is characterized by having a configuration obtained by combining any plural of the configurations described in (1).

The invention of claim 13 is the invention of claims 9 to 12
Wherein an image is formed using the intermediate transfer member according to any one of the above.

According to a fourteenth aspect of the present invention, an image is formed using the recording medium according to any one of the first to seventh aspects and the intermediate transfer body according to any one of the ninth to twelfth aspects. It is characterized by the following.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Invention of Claim 1) When a recording medium is heated in contact with a liquid, the receding contact angle decreases, and the recording medium shows lyophilicity with respect to liquids such as ink (ink-philic state). And has a surface characteristic in which the receding contact angle increases when heated in a non-contact state with the liquid. Means for preventing or reducing spread due to the flow of ink to a non-image forming portion caused by pressure between a recording body and an intermediate transfer body (or a recording medium) when an image is transferred to an intermediate transfer body (or directly to a recording medium) Having. By this means, the ink on the recording medium remains only in the image area, so that the cause of the spread of the ink to the non-image area as described above can be essentially cut off, and the printing resistance of the present recording medium is dramatically improved. It can be expected to be improved.

(Invention of Claim 2) FIG. 1 is a schematic diagram showing a main part of a recording medium according to the invention of claim 2, showing the structure of a recording layer laminated on a substrate. )
FIG. 1 shows a state of ink application by the recording layer of FIG.
This is shown in FIG. In FIG. 1, reference numeral 10 denotes a recording medium, 11 denotes a substrate, 12 denotes a recording layer, 12a denotes a protrusion provided on the recording layer, 20 denotes an intermediate transfer member, and 30 denotes ink. The recording layer 12 is provided with a projection 12a having a height of 15 μm, which serves as a barrier to prevent the recording body 10 from being in close contact with the intermediate transfer body 20 or between the recording body 10 and a recording medium (not shown). That is, the recording body 10 and the intermediate transfer body 20,
Alternatively, the pressure between the recording medium 10 and the recording medium is reduced, so that the ink can be prevented from spreading to the non-image portion due to the pressure. On the other hand, the thickness of the ink applied to the recording medium 10 is usually several μm, and the intermediate transfer body 20 or the recording medium has some elasticity.

(Explanation of Claim 3) FIG. 2 is a schematic view of a main part for explaining the structure of a recording medium according to the invention of claim 3, showing the structure of a recording layer laminated on a substrate.
FIG. 2A shows a state of ink application by the recording body of FIG. 2A. The recording body is provided with a uniform hole 12b on the entire surface, and the recording body 10 and the intermediate transfer body 2 are provided.
When the recording medium 10 and the recording medium (not shown) come into contact with each other, the ink enters the inside of the hole 12b due to both pressures, and the ink can be prevented from spreading to the non-image portion due to the pressure.

(Explanation of the Invention of Claim 4) FIG. 3 is a schematic configuration diagram of main parts for explaining the invention of claim 4. When the recording body 10 contacts the intermediate transfer body 20 or the recording body 10 and a recording medium (not shown), the recording body 10 is deformed in accordance with the amount of the ink 30 applied on the recording body 10, and the ink 3
The extent of 0 can be reduced.

(Explanation of Claim 5) FIG.
FIG. 2 is a schematic configuration diagram of a main part for describing the invention of FIG.
Is composed of a recording layer 12 and a substrate 11 made of an elastic body. If the Young's modulus of the substrate 11 is equal to or less than 10 ⁵ N / m ² , the substrate 11 is deformed according to the amount of the ink 30 applied on the recording layer 12, and the spread of the ink 30 to a non-image portion due to pressure is reduced. Can be reduced. At this time, the recording layer 12 is present on the contact surface of the recording medium 10 with the ink 30, but its thickness is usually several mm or less. Therefore, even a conventional recording material is sufficiently curved to prevent deformation of the substrate 11. Never.

(Explanation of the Claim 6) FIG. 5 is a schematic diagram showing a main part of the recording medium 1 for explaining the invention of the claim 6.
Numeral 0 includes a substrate 11, an intermediate layer 13, and a recording layer 12. If the thickness of the intermediate layer 13 is several mm or more and its Young's modulus is 10 ⁵ N / m ² or less, the recording layer 12
The intermediate layer 13 is deformed in accordance with the amount of the ink 30 applied to the ink, and the spread of the ink to the non-image area due to the pressure can be reduced. At this time, the recording layer 12 is present between the ink 30 and the intermediate layer 13, but the thickness is usually several mm or less. Therefore, even the conventional recording material is sufficiently curved to prevent deformation of the intermediate layer 13. Never.

(Explanation of the Seventh Invention) FIG. 6 is a schematic diagram showing the main part of the recording medium 1 for explaining the seventh invention.
0 has a configuration in which the configuration shown in claim 3 and the configuration shown in claim 6 are combined. In the structure according to the sixth aspect, the intermediate layer 13 made of an elastic body is provided to reduce the spread of the ink to the non-image portion. If the ratio is larger than the specified ratio, the desired effect may not be sufficiently obtained. Therefore, by further providing the uniform holes 12b in the recording layer 12, it is possible to prevent the ink which cannot be absorbed by the deformation of the intermediate layer 13 from spreading to the non-image portion. Thus, by combining the above-described plurality of configurations, it is possible to cope with various ink thicknesses.

Further, by combining the constitutions set forth in claims 3 and 4 to make the recording layer 12 of the recording medium 10 elastic and porous, a simple constitution having no intermediate layer is provided. It can be.

(Explanation of the Invention of Claim 8) FIG. 7 is a schematic structural view for explaining the invention of claim 8, in which 40 is an image forming apparatus, 41 is a plate cylinder, and 42 is a pressure roller. , 43 are an inking roller, 44 is a recording paper, 45 is a printed material conveying roller, and 46 is a printed material. In the image forming apparatus 40, a recording body (not shown) according to claims 2 to 7 is attached to the plate cylinder 41. By using the present invention, enlargement of an image portion (spread of ink to a non-image portion) can be prevented without changing the configuration of a conventional recording apparatus.

(Description of Invention of Claim 9) FIG. 8 is a schematic configuration diagram of a main portion for describing the invention of claim 9. In this embodiment, a rubber material having a Young's modulus of 10 ⁵ N / m ² or less is used for the intermediate transfer body 20. As a result, the intermediate transfer member 20 is deformed in accordance with the amount of the ink 30 applied on the recording member 10 even though the configuration of the recording member 10 is completely the same as that of the related art. Can be reduced.

(Explanation of the Tenth Invention) FIG. 9 is a schematic diagram showing a main part of the invention for explaining the tenth invention. The structure of the intermediate transfer member is shown in FIG. FIG. 9B shows a state of ink application using the intermediate transfer member of FIG. Normally, the surface of the intermediate transfer body 20 is provided with irregularities of several μm in order to obtain good image quality, but in this case, it is impossible to prevent ink from spreading to non-image portions. In the embodiment corresponding to the present invention, a projection 20 a having a height of 15 μm is provided on the surface of the intermediate transfer body 20, and this serves as a barrier to the recording body 10 and the intermediate transfer body 2.
Therefore, the ink 30 can be prevented from spreading to the non-image area.

(Explanation of the Invention of Claim 11) FIG. 10 is a schematic view of the essential part for explaining the invention of claim 11, wherein the intermediate transfer body 20 is made porous by providing a hole 20b. When the recording body 10 and the intermediate transfer body 20 come into contact with each other, the pressure of both causes the ink 30 to enter the hole 20b and prevent the ink from spreading to the non-image area.

(Explanation of the Invention of Claim 12) FIG. 11 is a schematic view of the essential part for explaining the invention of claim 12, and the intermediate transfer member of this embodiment is shown in claims 9 and 11. 3 shows an intermediate transfer member having a combination of configurations. Claim 9
Alternatively, in the configuration of 11, if the thickness of the ink 30 applied on the recording medium 10 is larger than the thickness or elastic modulus of the intermediate transfer body 20 by more than a specified value, the desired effect may not be sufficiently obtained. . Therefore, by providing a uniform hole 20b on the surface of the intermediate transfer member 20, it is possible to prevent the ink that cannot be absorbed by deformation of the intermediate transfer member 20 from spreading to the non-image portion. Thus, by combining the above-described plurality of configurations, it is possible to cope with various ink thicknesses.

(Explanation of the Invention of Claim 13) FIG. 12 is a schematic view of the essential parts for explaining the invention of claim 13, in which 47 is a blanket cylinder, and other functions are the same as those of FIG. Are given the same reference numerals as in FIG. In the present embodiment, an intermediate transfer member (not shown) having the structure described in claims 9 to 12 is attached to the blanket cylinder 47. By using this configuration, enlargement of the image portion (spread of ink to the non-image portion) can be prevented without changing the configuration of the conventional recording apparatus.

(Explanation of the Fourteenth Invention) FIG. 13 is a schematic diagram showing the main part of the invention for explaining the fourteenth invention. And the intermediate transfer member 20 having the configuration shown in FIG. By using this configuration, enlargement of the image area (spreading of the ink to the non-image area) can be prevented without changing the configuration of the conventional image forming apparatus. In addition to the embodiment shown in FIG. 13, a highly reliable image forming apparatus corresponding to the ink thickness can be obtained by arbitrarily combining the recording body according to claim 2 with the intermediate transfer body according to claim 9. Can be obtained.

<Example> The suppression of the enlargement of the image area, which is the object of the present invention, was evaluated by the following method, and the effect was verified. (1) A 25% halftone at 60 dpi and 60 lines / inch is produced. (2) The recording medium is developed. (3) One dot is observed with an optical microscope, and its area (S1) is measured. (4) After printing 2,000 sheets, develop again under the same conditions as in (2) above, and measure the area (S2) of one dot in the same manner. (5) Enlargement of the image portion is determined based on the numerical value of S2 / S1. When the enlargement of the image portion occurs in the above (5), S
2 / S1> 1, and in an ideal printing apparatus, S2
/ S1 = 1.

(Common experimental conditions) Ink: waterless lithographic ink (black ink) Printing speed: 60 ppm Recording paper: OK Supercoat

Example 1 (corresponding to claims 2 to 6) Intermediate transfer member: Hamada S6500 (average surface roughness: 5 μm)
m) Ink thickness: 4 μm

Result

[0045]

[Table 1]

Each recording medium in Table 1 has the following specifications. Recording medium Normal Recording layer thickness: 2 μm Substrate: PET (100 μm) Recording medium A Recording medium surface average roughness: 12.6 μm Unevenness density: 2.4 × 10 ⁴ / mm ² Recording medium B Cavity rate: 27% Is the proportion of the cavity per unit volume of the recording layer. Recording medium C Recording layer Young's modulus: 0.68 × 10 ⁵ N / m ² Recording layer thickness: 12 μm Recording medium D Substrate Young's modulus: 0.75 × 10 ⁵ N / M ² Substrate pressure: 100 μm Recording medium E Intermediate layer Young's modulus: 0.68 × 10 ⁵ N / m ² Intermediate layer thickness: 7 μm

Example 2 (corresponding to claim 7) Intermediate transfer member: Hamada S6500 (average surface roughness: 5 μm)
m) Ink thickness: 6 μm

Result

[0049]

[Table 2]

The recording medium F shown in Table 2 has the following specifications. Cavity ratio: 27% Intermediate layer Young's modulus: 0.68 × 10 ⁵ N / m ² Intermediate layer thickness: 7 μm

(Example 3 (corresponding to claims 9 to 11)) Recording medium: recording layer: 4 μm Substrate: PET100 ink thickness: 4 μm

Result

[0053]

[Table 3]

The intermediate transfer member shown in Table 3 has the following specifications. Intermediate transfer member A Intermediate transfer member Young's modulus: 0.59 × 10 ⁵ N / m ² Intermediate transfer member B Average surface roughness: 18 μm Unevenness density: 1.7 × 10 ⁴ / mm ² Intermediate transfer member C Cavity: 48 %

(Example 4 (corresponding to claim 12)) Recording medium: recording layer: 4 μm Substrate: PET 100 μm Ink thickness: 6 μm

Result

[0057]

[Table 4]

(Example 5 (corresponding to claim 14)) Ink thickness: 6 μm

Result

[0060]

[Table 5]

[0061]

According to the first aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with a liquid, and the liquid shows a lyophilic property with respect to a liquid such as ink (an ink-philic state). In a recording medium having a surface characteristic in which a receding contact angle increases when heated in a non-contact state, when transferring an image to an intermediate transfer body or a recording medium, the pressure between the recording medium and the intermediate transfer body, or the recording medium And a means for preventing or reducing the flow of ink to the non-image forming portion caused by the pressure between the recording medium and the recording medium, so that the ink can be prevented from spreading on the recording medium due to the pressure. Expansion can be prevented or reduced.

According to a second aspect of the present invention, in the recording medium according to the first aspect, the recording surface has a height of 5 μm or more and 10 ³ or more projections per 1 mm ^2, so that the recording body and the intermediate transfer body or It is possible to prevent close contact between the recording medium and the recording medium and prevent or reduce the spread of the ink to the non-image area due to the pressure.

According to a third aspect of the present invention, in the recording medium according to the first aspect, the recording medium has a porous recording layer. The spread of the ink to the non-image area can be reduced.

According to a fourth aspect of the present invention, in the recording medium according to the first aspect, the recording medium has an elastic recording layer. It is possible to prevent ink from spreading to the image area.

According to a fifth aspect of the present invention, in the recording medium of the first aspect, the recording medium includes a substrate and a recording layer, and since the substrate has elasticity, the pressure on the ink on the recording medium is reduced. It can be absorbed by the substrate and prevent the ink from spreading to the non-image area due to pressure.

According to a sixth aspect of the present invention, in the recording medium according to the first aspect, the recording medium includes a substrate, a recording layer, and another intermediate layer, and the intermediate layer has elasticity. Can be absorbed by the intermediate layer, and the ink can be prevented from spreading to the non-image area due to the pressure.

According to a seventh aspect of the present invention, since the recording medium according to the second to sixth aspects has a configuration in which a plurality of configurations are combined, it is possible to effectively and reliably prevent the ink from spreading to the non-image portion due to pressure. Can be.

According to the eighth aspect of the present invention, since the recording medium according to any one of the second to seventh aspects is used, image quality can be further stabilized as compared with a conventional recording apparatus.

According to the ninth aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with the liquid, the liquid becomes lyophilic with respect to a liquid such as ink (an ink-philic state), and the liquid does not contact the liquid. An intermediate transfer member for transferring an image from a recording member having a surface characteristic in which a receding contact angle increases when heated in a state, wherein the recording member has a Young's modulus of 10 ⁶ N / m ² or less. The pressure on the upper ink can be absorbed by the intermediate transfer member, and the spread of the ink to the non-image area due to the pressure can be prevented.

According to a tenth aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with the liquid, and the liquid shows a lyophilic property with respect to a liquid such as ink (ink-philic state), and does not contact with the liquid. An intermediate transfer member for transferring an image from a recording member having a surface characteristic in which a receding contact angle increases when heated in a state, and has a height of 5 μm or more and a surface of 10 μm / mm ^{2.
Since there are three} or more projections, it is possible to prevent the recording medium and the intermediate transfer body from sticking to each other, and to reduce the spread of the ink to the non-image area.

According to the eleventh aspect of the present invention, the receding contact angle is reduced when heated in a state of contact with a liquid, the liquid becomes lyophilic with respect to a liquid such as ink (a state of lyophilic ink), and the liquid does not come into contact with the liquid. An intermediate transfer member that transfers an image from a recording member that has a surface characteristic in which the receding contact angle increases when heated in a state, and has a porous shape on the surface. It is possible to absorb and reduce the spread of the ink to the non-image area due to the pressure.

The twelfth aspect of the present invention relates to the ninth to eleventh aspects.
Has a configuration in which a plurality of configurations of the intermediate transfer member described in (1) are combined, and therefore, it is possible to effectively and reliably prevent the spread of the ink to the non-image portion.

The thirteenth aspect of the present invention relates to the ninth to twelfth aspects.
Since image formation is performed using the intermediate transfer member according to any one of the above, image quality can be more stabilized as compared with a conventional recording apparatus.

According to a fourteenth aspect of the present invention, an image is formed using the recording medium according to any one of the second to seventh aspects and the intermediate transfer body according to any one of the ninth to twelfth aspects. Therefore, the image quality can be more stabilized as compared with the conventional recording apparatus.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a main part of a recording medium according to a second embodiment of the present invention;

FIG. 2 is a schematic diagram of a main part for describing a structure of a recording medium according to the invention of claim 3;

FIG. 3 is a schematic diagram of a main part for describing a configuration of a recording medium according to the invention of claim 4;

FIG. 4 is a schematic diagram of a main part for describing the invention of claim 5;

FIG. 5 is a schematic configuration diagram of a main part for describing the invention of claim 6;

FIG. 6 is a schematic configuration diagram of a main part for describing the invention of claim 7;

FIG. 7 is a schematic diagram of a main part for describing the invention of claim 8;

FIG. 8 is a schematic diagram of a main part for describing the invention of claim 9;

FIG. 9 is a schematic diagram of a main part for describing the invention of claim 10;

FIG. 10 is a schematic diagram of a main part for describing the invention of claim 11;

FIG. 11 is a schematic diagram of a main part for describing the invention of claim 12;

FIG. 12 is a schematic diagram of a main part for describing the invention of claim 13;

FIG. 13 is a schematic diagram of a main part for describing the invention of claim 14;

FIG. 14 is a schematic diagram of a main part configuration for describing an example of image formation using a conventional recording medium.

[Explanation of symbols]

10: Recorded body, 10a: Image part, 10b: Non-image part, 1
DESCRIPTION OF SYMBOLS 1 ... Substrate, 12 ... Recording layer, 12a ... Projection part, 12b ...
Hole, 20: intermediate transfer member, 20a: protrusion, 20b: hole,
Reference numeral 30: ink, 40: image forming apparatus, 41: plate cylinder, 42
.., A pressure roller, 43, an inking roller, 44, a recording paper, 45, a printed matter transport roller, 46, a printed matter, 47, a blanket cylinder.

Claims (14)

[Claims] 1. When heated in contact with a liquid, the receding contact angle is reduced, the liquid becomes lyophilic to a liquid such as ink (a lyophilic state), and when heated in a non-contact state with the liquid. In a recording medium having a surface characteristic in which a receding contact angle increases, the recording medium is used to transfer an image to an intermediate transfer body or a recording medium, between the recording medium and the intermediate transfer body, or between the recording body and the recording medium. A recording medium having an ink flow preventing means for preventing or reducing the flow of ink to a non-image forming portion due to a transfer pressure generated between the recording medium and the recording medium. 2. The recording medium according to claim 1, wherein the ink flow preventing means has a recording surface having a height of 5 μm or more and 10 ³ or more projections per 1 mm ² . 3. The recording medium according to claim 1, further comprising a porous recording layer as said ink flow preventing means. 4. The recording medium according to claim 1, further comprising an elastic recording layer as said ink flow preventing means. 5. The recording medium according to claim 1, wherein said recording medium is composed of a substrate and a recording layer, and said substrate has elasticity. 6. The recording medium according to claim 1, wherein said recording medium comprises a substrate, an intermediate layer, and a recording layer, and said intermediate layer has elasticity. 7. A recording medium having a configuration obtained by combining any two or more of the configurations of claim 2 to 6. 8. An image forming apparatus using the recording medium according to claim 1. Description: 9. When heated in contact with a liquid, the receding contact angle is reduced, the liquid becomes lyophilic to a liquid such as ink (lyophilic state), and when heated in a non-contact state with the liquid. An intermediate transfer member for transferring an image from a recording member having a surface characteristic in which a receding contact angle increases, wherein the intermediate transfer member has a Young's modulus of 10 ⁶ N / m ² or less. . 10. When heated in contact with a liquid, the receding contact angle is reduced, the liquid becomes lyophilic to a liquid such as ink (lyophilic state), and when heated in a non-contact state with the liquid. An intermediate transfer body for transferring an image from a recording medium having a surface characteristic in which a receding contact angle increases, wherein the intermediate transfer body has a height of 5 μm or more and a surface of 10 μm / mm ² or more.
An intermediate transfer member having ^three or more projections. 11. When heated in a state of contact with a liquid, the receding contact angle is reduced, a state of being lyophilic to a liquid such as ink (a state of lyophilic ink), and when heated in a non-contact state with the liquid. An intermediate transfer member for transferring an image from a recording member having a surface characteristic in which a receding contact angle increases, the intermediate transfer member having a porous shape on the surface. 12. An intermediate transfer member having a configuration obtained by combining a plurality of any of the configurations according to claim 9 to 11. 13. An image forming apparatus, wherein an image is formed using the intermediate transfer body according to claim 9. 14. An image forming method using the recording material according to any one of claims 1 to 7 and the intermediate transfer material according to any one of claims 9 to 12. Image forming device.