JP2003054116A - Ink jet recording medium and ink jet recording equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording medium and ink jet recording equipment which enable execution of a heating-pressing treatment in a short time on the occasion of executing this treatment for the recording medium having an ink receiving layer containing thermoplastic resin particles in a surface layer so as to make the ink receiving layer transparent and enable preparation of an image print having a high quality. SOLUTION: A thermosetting resin is used as a synthetic resin covering the base of the recording medium 1. On the occasion of executing the treatment for making the recording medium 1 transparent, a holding temperature of a heating-pressing means 4 for the treatment is controlled to satisfy MFT<T1 < T2 <Tr and T2 <Tb (wherein the heat resistance temperature of the synthetic resin covering the base of the recording medium 1 is denoted by Tr, the lowest film-forming temperature of the thermoplastic resin particles contained in the ink receiving layer of the recording medium 1 by MFT, the heat resistance temperature of a heating belt 43 constituting the heating-pressing means 4 by Tb, the lower limit of the holding temperature of the heating-pressing means by T1 and the upper limit of the holding temperature of this means by T2 ).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus for ejecting ink to record on a recording medium having an ink receiving layer containing thermoplastic resin particles on its surface.

[0002]

2. Description of the Related Art Inkjet recording for recording an image by ejecting ink in the form of fine droplets onto a recording surface of a recording medium is
Due to the recent technological progress, it has become possible to achieve high image quality comparable to silver halide photography and cost reduction of the apparatus, and it has come to be widely used.

The ink used in such an ink jet recording apparatus is roughly classified into dye ink and pigment ink. The dye ink is soluble in a solvent, exhibits a clear color with high purity, and since it does not generate scattered light and reflected light because it has no particle properties, it has high transparency and a clear hue, When a dye molecule is destroyed by a photochemical reaction or the like, the decrease in the number of molecules directly affects the coloring density, which causes a problem of poor light resistance. On the other hand, the pigment ink is insoluble in the solvent, the dye molecules form particles and contribute to coloring in the state of being dispersed in the solvent, and even if the surface molecules are destroyed by a photochemical reaction or the like, Since there is a new dye molecule layer in the lower part, there is an advantage that the apparent reduction in coloring power is small and the image storability is superior to the dye ink.

However, the pigment ink has a problem that it is inferior in glossiness due to the influence of scattered light and reflected light due to particles.
Therefore, for the purpose of imparting gloss to the surface of the recording medium on which an image is formed by using a pigment ink containing a dispersant and preventing the image from bleeding due to contact with water and improving scratch resistance, An image is formed by using a recording medium having an ink receiving layer containing thermoplastic resin particles (on the image recording surface side) and a pigment ink solvent absorbing layer adjacent to the inside of the ink receiving layer, and then heating the recording medium. A technique has been proposed in which the thermoplastic resin particles in the ink receiving layer are melted and smoothed by applying pressure to make the ink receiving layer transparent (Japanese Patent Application No. 2000-164386).

In such a technique, the recording medium on which an image has been recorded and formed by the recording head is conveyed to the heating / pressurizing means by the conveying means in order to make the ink receiving layer transparent, and then the heating / pressurizing means. By heating and pressurizing the ink receiving layer, the ink receiving layer becomes transparent. However, in order to produce a so-called high-quality image print, it is necessary to appropriately make the ink receiving layer transparent.

However, in recent years, a wide variety of recordings having an ink receiving layer containing thermoplastic resin particles on the surface thereof have appeared, and in order to perform high quality image printing on these recording media. The heating temperature at the time of performing the heating and pressurizing treatment depends on the characteristics of the synthetic resin and the thermoplastic resin particles constituting the recording medium,
It was necessary to change the pressure applied.

In particular, at the heating temperature, various problems will be caused unless the treatment is carried out within an appropriate range.
For example, if the heat treatment is performed at a temperature higher than the heat resistant temperature of the synthetic resin that coats the base material, the base material may be deformed. Conversely, if the heat treatment is performed at a lower temperature than necessary, the thermoplastic Problems such as insufficient transparency of the resin particles and a long heating time for sufficient transparency and a decrease in processing speed thereof have occurred.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a recording medium having an ink receiving layer containing thermoplastic resin particles as a surface layer thereof, and the ink An ink jet recording medium capable of performing the heat and pressure treatment in a shorter time when performing the heat and pressure treatment for making the receiving layer transparent and capable of producing a higher quality image print, and An object is to provide an inkjet recording device.

[0009]

In order to achieve the above object, an ink jet recording medium according to claim 1 comprises a base material coated with a synthetic resin, and an ink solvent absorption layer formed on the base material. In the recording medium comprising an ink receiving layer containing thermoplastic resin particles formed on the ink solvent absorption layer, that is, on the surface layer, the synthetic resin is a thermosetting resin.

In order to achieve the above object, an ink jet recording apparatus according to a second aspect of the invention is a substrate coated with a synthetic resin, an ink solvent absorption layer formed on the substrate, and an ink solvent absorption layer on the substrate. That is, in an inkjet recording apparatus for recording by ejecting ink to a recording medium composed of an ink receiving layer containing thermoplastic resin particles formed on the surface layer, a recording head for recording on the recording medium, and the recording head A heating / pressurizing means for performing a treatment for making the ink receiving layer transparent to the recorded recording medium, a control means for controlling a heating temperature in the heating / pressurizing means, and a recording medium recorded by the recording head. An inkjet recording device having a transporting means for transporting the heating means to the heating / pressurizing means, wherein the heating / pressurizing means comprises a heating roller. When the heating roller pressing roller provided opposite to, is constituted and a heating belt which is suspended to the heating roller and the driven roller, further,
The control means Tr is the heat resistant temperature of the synthetic resin coating the base material, MFT is the minimum film forming temperature of the thermoplastic resin particles of the ink receiving layer, Tb is the heat resistant temperature of the heating belt,
When the holding temperature lower limit of the heating / pressurizing means is defined as T ₁ and the holding temperature upper limit of the heating / pressurizing means is defined as T ₂ , MFT <T
_The control is performed so as to satisfy ₁ <T ₂ <Tr and T ₂ <Tb.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an inkjet recording medium and an inkjet recording apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an inkjet recording medium according to an embodiment of the present invention. FIG. 2 is an overall configuration diagram of the inkjet recording apparatus according to the embodiment of the present invention.

First, an embodiment of an ink jet recording medium according to the present invention will be described with reference to FIG.

As shown in FIG. 1, the ink jet recording medium 1 in this embodiment is mainly composed of a base material 1c coated with a thermosetting synthetic resin 1d and a void layer formed on the base material 1c. And an ink receiving layer 1a containing thermoplastic resin particles formed on the ink solvent absorbing layer, that is, on the surface layer.

Like the ink jet recording medium according to the present invention, a base material of a recording medium having an ink receiving layer containing thermoplastic resin particles on its surface layer is a base for making a quality of a recorded image close to a photographic quality. Paper coated with synthetic resin is preferably used.

Polyethylene is generally used as the synthetic resin because of its low cost and its suitability for obtaining high-quality images. This polyethylene is mainly low density polyethylene (LD
PE) and / or high density polyethylene (HDPE), but some other LLDPE, polypropylene, etc. are also used. In particular, the polyethylene layer on the ink solvent layer side is preferably one in which rutile or anatase type titanium oxide is added to polyethylene to improve opacity and whiteness, as is commonly used in photographic printing paper. Has been.

However, since the so-called thermoplastic resin such as polyethylene described above has a relatively low heat resistance temperature, a strict limitation is imposed on the heating temperature when the ink receiving layer of the recording medium is made transparent. Was to be imposed. Therefore, in the inkjet recording medium according to the present invention, a so-called thermosetting resin is used as the synthetic resin coating the base material.

A specific example of the thermosetting synthetic resin 1d is, for example, a bisphenol A type liquid epoxy resin (trade name: Epicoat 82 manufactured by Yuka Shell Epoxy Co., Ltd.).
It is conceivable that 8 to 8) to which 23 to 25 phr of isophoronediamine was added. This thermosetting synthetic resin is used as the base material 1
After applying to c, it is cured at 80 ° C. for about 4 hours, and the heat resistant temperature becomes about 150 ° C.

As described above, by using a thermosetting resin instead of a thermoplastic resin that has been conventionally used as a synthetic resin for coating a base material, heating is performed when the ink receiving layer of the recording medium is made transparent. The temperature can be set high (∵ Generally, the heat resistant temperature of thermosetting resin is higher than that of thermoplastic resin). Therefore, along with this, it becomes possible to perform the transparentizing treatment of the ink receiving layer in a shorter time.

The paper used for the base material 1c is made from wood pulp as a main raw material and is made from synthetic pulp such as polypropylene or synthetic fiber such as nylon or polyester. As the wood pulp, there is known a wood pulp containing a large amount of short fibers such as LBKP, NBSP, LBSP, NDP and LDP.

It is essential that the ink solvent absorbing layer 1b has the ability to absorb the ink solvent, and the ability is obtained by containing the inorganic solid fine particles in the ink solvent absorbing layer 1b.

Specific examples of the inorganic solid fine particles include light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc hydroxide and sulfide. Zinc, zinc carbonate, hydrotalcite, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, synthetic amorphous silica, colloidal silica, alumina, colloidal alumina, pseudo bamanite, aluminum hydroxide, lithobon, zeolite, magnesium hydroxide, etc. The white inorganic pigment and the like can be mentioned.

When the ink receiving layer 1a is heated, it is indispensable that the ink ejected on the surface of the ink receiving layer 1a be taken in and smoothed, and the so-called thermoplastic resin is contained in the ink receiving layer 1a. Its ability is obtained by containing resin particles.

Specific examples of the thermoplastic resin particles include:
For example, polycarbonate, polyacrylonitrile, polystyrene, polyacrylic acid, polymethacrylic acid, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate,
Mention may be made of polyesters, polyamides, polyethers, copolymers thereof and salts thereof. In selecting these thermoplastic resin particles, their ink receptivity, glossiness of a recorded image after fixing by heating and pressurization, image fastness, releasability and the like are taken into consideration.

As described above, there are many kinds of thermoplastic resin particles contained in the synthetic resin 1d for coating the base material 1c and the ink receiving layer 1a,
These will be combined after the recorded images have been individually selected for high quality.

Here, the case where this combination is not successful will be described. Hereinafter, the heat resistant temperature of the synthetic resin 1d coating the substrate 1c is defined as Tr, and the minimum film forming temperature of the thermoplastic resin particles of the ink receiving layer 1a is defined as MFT.

For example, the heat resistant temperature Tr of the synthetic resin 1d
Was lower than the minimum film forming temperature MFT of the thermoplastic resin particles. In such a case, when the heating temperature of the recording medium 1 reaches a temperature higher than MFT when the recording medium 1 is heated and pressed, the synthetic resin cannot withstand this and melts (∵ the heat resistant temperature of the synthetic resin. Tr is lower than the minimum film forming temperature MFT of the thermoplastic resin particles).
Therefore, the base material 1c coated with this synthetic resin also deforms. Along with this, the entire recording medium 1 is also deformed. If this happens, the quality of the recorded image becomes extremely poor.

Therefore, in order to avoid such a problem,
The minimum film forming temperature MFT of the thermoplastic resin particles is set to a temperature lower than the heat resistant temperature Tr of the synthetic resin 1d.
In view of the ink absorptivity of the recording medium 1, the ease of heating and densification of a recorded image, the gloss, etc., generally, the minimum film forming temperature MFT of the thermoplastic resin particles is from 40 ° C. to the synthetic resin. It is considered that it is preferable to set the heat resistance temperature Tr to the range.

An example of the minimum film forming temperature MFT for each substance is shown below: Acrylic copolymer resin MFT 50 ° C. Acrylic emulsion MFT 60 ° C. Urethane resin MFT 84 ° C. Polyester urethane MFT> 60 ° C. Low density polyolefin MFT 105 ° C. Vinyl acetate System Copolymerized Polyolefin MFT 80 ℃

As described above, when the recording medium having the ink receiving layer containing the thermoplastic resin particles on the surface layer is subjected to the heat and pressure treatment, the thermoplastic resin particles contained in the ink receiving layer become sufficiently transparent. In addition, it is important to control the temperature at the time of heating so that the recording medium (base material) is not deformed by heating.

That is, the ink jet recording medium 1 is
Heating in an inkjet recording device for recording
The temperature range maintained by the pressurizing means is
The holding temperature lower limit is T1, and the heating and pressing means holding temperature upper limit is T1.
If defined as 2, MFT <T ₁<T_Two<Satisfy Tr
It is desirable to be controlled as follows.

Next, an embodiment of the ink jet recording apparatus according to the present invention will be described with reference to FIG.
The recording medium 1 described below is the recording medium described above.

As shown in FIG. 2, the ink jet recording apparatus according to the present embodiment mainly has a recording medium conveying means 2 for conveying the recording medium 1 and a predetermined image on the recording surface of the recording medium 1. It comprises a recording head 3 for recording, and a heating / pressurizing means 4 for applying a heating / pressurizing process to the recording medium 1 on which an image has been recorded and formed by the recording head 3.

The recording medium 1 is supplied by a supplying means (not shown), is conveyed rightward in the drawing by a recording medium conveying means (hereinafter, simply referred to as a conveying means) 2, and is arranged on the downstream side of the conveying means 2. A predetermined image is recorded on the recording surface of the recording medium 1 by the recording head 3. Then, the recording medium 1 after recording is further cut into an appropriate size by a cutting means (not shown) arranged on the downstream side of the recording head 3, and then conveyed to the heating / pressurizing means 4. 1
After fixing the image recorded on the recording surface of,
It is discharged to the outside of the inkjet recording device.

Here, the recording medium 1 is shown as an example in which a long roll paper wound in a roll shape is used in the illustrated example, but the present invention is not limited to this, and the sheet is cut into an appropriate size. It may be a recording medium having a shape of a circle.

The carrying means 2 is a carrying roller 21 which is rotationally driven by a driving means (not shown), and a driven roller 22 for sandwiching the recording medium 1 between the carrying roller 21 and the carrying roller 21.
And the recording medium 1 is sandwiched between the conveying roller 21 and the driven roller 22, the conveying roller 21
By the rotational driving of the recording head 3, the recording head 3 conveys a predetermined amount in the right direction (sub-scanning direction) in accordance with the image recording by the recording head 3.

The recording head 3 is arranged on the downstream side of the conveying means 2 and is arranged over the width direction of the recording medium 1 so as to be substantially orthogonal to the conveying direction of the recording medium 1.
It is a reciprocal scanning type recording head that is configured to be movable in the main scanning direction.

The recording head 3 is, for example, Y (yellow), M (magenta), C (cyan), K (black).
By having a plurality of ink tanks in which pigment inks of respective colors such as are stored, and main scanning movement along the scanning guide 31, by ejecting a predetermined ink at a predetermined timing according to image data, A predetermined image is recorded and formed on the recording surface of the recording medium 1 in cooperation with the conveyance of the recording medium 1 by the conveying unit 2.

The heating / pressurizing means 4 is arranged on the downstream side of the recording head 3 so as to heat and press the recording medium 1 on which an image has been recorded and formed by the recording head 3.
A heating roller 41, a pressure roller 44 for sandwiching the recording medium 1 between the heating roller 41, a heating belt 43 suspended on the heating roller 41, a driven roller 42 driven by the heating belt 43, A pressure belt 46 that is a means for pressing the recording medium 1 against the heating belt 43, which is suspended by a pressure roller 44; and a driven roller 45 that follows this.
It comprises a cooling means 47 for cooling the heating belt 43, a temperature sensor 48 for detecting the surface temperature of the heating belt 43, and a control means (not shown) for controlling the heating temperature of the heating roller 41. ing.

As shown in the figure, the heating roller 41 is a hollow roller, and has a heating element 41a such as a halogen heater as a heat source built in along the axial direction thereof. The heating roller 41 is heated by the heat generated by the heating element 41a,
Further, by heating the heating belt 43 suspended around it, the thermoplastic resin particles contained in the ink receiving layer of the recording medium 1 pressed against this are melted.

The heating roller 41 is preferably made of a material having a high thermal conductivity so that the recording medium 1 can be efficiently heated by the heat generated from the heating element 41a, and a metal roller is used. Is preferred.

Further, the temperature sensor 48 is arranged in the vicinity of the heating roller 41 so as to detect the surface temperature of the heating belt 43 suspended thereon. The temperature sensor 4
By detecting the surface temperature of the heating belt 43 by 8, the amount of heat generated by the heating element 41a inside the heating roller 41 is controlled by the control means (not shown), and the surface temperature of the heating belt 43 is kept within a predetermined temperature range. To control.

As described above, the predetermined temperature range is a range satisfying MFT <T ₁ <T ₂ <Tr. The heating / pressurizing means holding temperature lower limit T ₁ is not higher than the minimum film forming temperature MFT of the thermoplastic resin particles, since the thermoplastic resin particles contained in the ink receiving layer 1a of the recording medium 1 do not melt, MFT < It is set to T ₁ . The upper limit T ₂ for holding temperature of the heating / pressurizing means is set to T ₂ <Tr so that the recording medium 1 is not heated beyond the heat resistant temperature Tr of the synthetic resin coating the base material of the recording medium 1. It By controlling the surface temperature of the heating belt 43 within such a temperature range, the thermoplastic resin particles contained in the ink receiving layer 1a of the recording medium 1 can be made sufficiently transparent without deforming the substrate 1c. You can

Further, the heating belt 4 for carrying out the heat treatment.
3 is the heating belt 4 when the recording medium 1 is heat-treated.
Do not deteriorate the quality of the recorded image due to the damage and deformation of item 3.
Need to be managed. Therefore, the heating belt
If the heat resistant temperature of 43 is defined as Tb, the heating belt 43
The heat-resistant temperature Tb of the heat-pressurizing means is the upper limit T of the holding temperature. _Two
Need to be higher.

Therefore, M, which is the above-mentioned predetermined temperature range,
In addition to FT <T ₁ <T ₂ <Tr, the surface temperature of the heating belt 43 is controlled to a temperature range that satisfies the condition T ₂ <Tb of the heat resistant temperature Tb of the heating belt 43, thereby controlling the recording medium. The thermoplastic resin particles contained in the first ink receiving layer 1a can be made sufficiently transparent without deforming the substrate 1c, and the heating belt 43 is not damaged or deformed, and the quality of the recorded image is improved. Can be held.

The heating element 41a may be provided near the outside of the heating roller 41, for example.

The heating belt 43 is suspended between the heating roller 41 and the driven roller 42, and after being heated to a predetermined temperature range by the heating element 41a inside the heating roller 41,
The surface of the recording medium 1 on which an image has been recorded and formed by the recording head 3 is pressed. As a result, the thermoplastic resin particles contained in the ink receiving layer of the recording medium 1 are melted, and the surface roughness of the heating belt 3 is improved to the same level as the surface roughness of the heating belt 3.

The heating belt 43 is basically a metal belt whose surface is coated with a coating. The heating belt 43 is made of a material in consideration of releasability from the recording medium 1 and surface roughness when coated. The following is used as -Nickel belt + Silicon rubber + PFA-Nickel belt + PFA-Nickel belt + Silicon rubber-Nickel belt + Fluorine coat-Nickel belt + Silicon rubber + Curing type silicone-Nickel belt + Curing type silicone-SUS belt + Silicon rubber + PFA-SUS belt + PFA ・ SUS belt + silicone rubber ・ SUS belt + fluorine coat ・ SUS belt + silicone rubber + curable silicone ・ SUS belt + curable silicone ・ Polyimide belt + silicone rubber + PFA ・ Polyimide belt + PFA ・ Polyimide belt + silicone rubber ・ Polyimide belt + Fluorine coat / polyimide belt + Silicone rubber + Curable silicone / Polyimide belt + Curable silicon The surface roughness of these heating belts 43 is Ra = 0.5 μm.
Or less and 0.01 μm or more, ideally Ra =
It is required to be 0.1 μm or less.

As described above, by heating the recording medium 1 by the heating belt 43, the heating time can be maintained without slowing down the processing speed, and the recording medium can be sufficiently maintained even when the predetermined temperature range is low. 1 ink receiving layer 1a
Can be made transparent.

As the heating roller 41, a metal roller made of metal such as stainless steel is used as the pressure roller 44. The pressure roller 44 is constantly pressed toward the heating roller 41 by an urging means (not shown).

The pressure belt 46 is suspended between the pressure roller 44 and the driven roller 45. By pressing the image forming surface of the recording medium 1 against the heating belt 43, the surface roughness of the recording medium 1 is improved. The pressure belt 46 is basically a metal belt whose surface is coated with a coating, similar to the heating belt 43. Considering releasability from the recording medium 1 and surface roughness when coated. And heating belt 4
Materials such as those listed in Section 3 are used.

As shown in FIG. 2 (FIG. 2), the heating roller 4
1, the heating belt 43 is provided downstream of the recording medium 1 in the conveying direction.
A cooling means 47 is provided for cooling the. Recording medium 1
In the process of passing between the heating roller 41 and the pressure roller 44, the pressure belt 46 is pressed against the heating belt 43, so that the surface roughness thereof is improved and the particles are transported downstream. Finally, when peeling from the downstream end of the heating belt 43 which is the outlet of the heating / pressurizing means 4, if the surface temperature is not sufficiently cooled, the surface roughness will be adversely affected. First, sufficient cooling must be performed. Therefore, the cooling means 47 detects the surface temperature of the heating belt 43 by a temperature sensor (not shown) and controls the degree of cooling according to the value,
The surface temperature when the recording medium 1 is separated from the downstream end of the heating belt 43 is suppressed to the minimum film forming temperature MFT or lower.

Specific examples of the cooling means 47 include an air cooling fan, a hollow pipe in which cooling air is circulated, and a heat radiation block.

As described above, the recording medium 1 is conveyed to the heating / pressurizing means 4 after the image is recorded and formed by the recording head 3, and first, the heating / pressurizing means 4 is heated. The pressure applied by the roller 41 and the pressure roller 44 flattens the surface irregularities. Next, the heat applied from the heating belt melts the thermoplastic resin particles contained in the ink receiving layer of the recording medium 1 to improve the surface roughness. Further, the recording medium 1 is fixed by the pressure belt 46.
By pressing the image forming surface of the heating belt 43 against the surface of the heating belt 43, the surface roughness (Ra = 0.5 μm) of the heating belt 43 is increased.
m-0.01 μm), the surface roughness is improved to the same extent. Then, after being cooled to the minimum film forming temperature MFT or lower by the cooling means 47, it is discharged to the outside of the heating / pressurizing means 4.

When the ink receiving layer 1a of the recording medium 1 is appropriately made transparent and the surface roughness thereof is improved by the above-mentioned means, the light reflectance of the image forming surface is increased, and the recording medium 1 of the recording medium 1 is improved. Since the degree of gloss is increased, a higher quality image print can be created as compared with the conventional one.

In this embodiment, the heating belt 43 has two
Although it is suspended by one roller, it may be suspended by two or more rollers, for example.

[0056]

As described above, in the ink jet recording medium according to the present invention, the thermosetting resin is used as the synthetic resin for coating the base material in place of the conventionally used thermoplastic resin. Therefore, along with this, the heating temperature for making the ink receiving layer of the recording medium transparent can be set high (∵ Generally, the heat resistant temperature of the thermosetting resin is higher than that of the thermoplastic resin. For). Therefore,
The ink receiving layer of the recording medium can be made transparent in a shorter time.

As described above, in the ink jet recording apparatus according to the present invention, the heating temperature at the time of performing the heating / pressurizing process on the recording medium is MFT <MFT <the predetermined temperature range.
Since it is possible to control T ₁ <T ₂ <Tr and to control the temperature range to satisfy the condition T ₂ <Tb of the heat resistant temperature Tb of the heating belt, the ink receiving layer of the recording medium is deformed to the base material. It can be made sufficiently transparent without causing it, without causing damage or deformation of the heating belt,
It is possible to always maintain the quality of the recorded image.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an inkjet recording medium according to an embodiment of the present invention.

FIG. 2 is an overall configuration diagram of an inkjet recording apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating a heating temperature control process by a control unit of the inkjet recording apparatus shown in FIG.

[Explanation of symbols]

1 ... Recording medium 1a ... Ink receiving layer 1b ... Ink solvent absorption layer 1c ... Base material 1d ... Synthetic resin 2 ... Transport means 21 ... Conveyor roller 22 ... Driven roller 3 ... Recording head 31 ... Scanning guide 4. Heating / pressurizing means 41 ... Heating roller 41a ... Heating element 42 ... driven roller 43 ... Heating belt 44 ... Pressure roller 45 ... driven roller 46 ... Pressure belt 47 ... Cooling means 48 ... Temperature sensor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Kaga             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica Stock Association             In-house F-term (reference) 2C056 EA01 EA13 EC14 EC29 FC06                       HA45 HA46                 2H086 BA05 BA16 BA17 BA19 BA31                       BA32

Claims (2)

[Claims] 1. An ink receiving medium comprising a base material coated with a synthetic resin, an ink solvent absorption layer formed on the base material, and thermoplastic resin particles formed on the ink solvent absorption layer, that is, a surface layer. An inkjet recording medium comprising a layer, wherein the synthetic resin is a thermosetting resin. 2. An ink receptor comprising a base material coated with a synthetic resin, an ink solvent absorption layer formed on the base material, and thermoplastic resin particles formed on the ink solvent absorption layer, that is, on the surface layer. In an inkjet recording apparatus for recording by ejecting ink to a recording medium composed of layers, a recording head for recording on the recording medium and an ink receiving layer for the recording medium recorded by the recording head are made transparent. An ink jet having a heating and pressurizing means for performing a process for controlling the heating temperature, a control means for controlling a heating temperature in the heating and pressurizing means, and a conveying means for conveying the recording medium recorded by the recording head to the heating and pressurizing means. In the recording apparatus, the heating / pressurizing unit includes a heating roller having a heating unit, a pressing roller provided to face the heating roller, and the heating roller. Roller and a heating belt suspended on a driven roller, and the control means controls the heat resistant temperature of the synthetic resin coating the base material by Tr,
The minimum film-forming temperature of the thermoplastic resin particles of the ink receiving layer is MFT, the heat-resistant temperature of the heating belt is Tb, the lower holding temperature of the heating / pressurizing means is T ₁ , and the upper holding temperature of the heating / pressurizing means is T ₁ . When defined as ₂ , MFT <T ₁ <T ₂ <
An inkjet recording apparatus, wherein control is performed so that Tr and T ₂ <Tb are satisfied.