JP2011020318A - Inkjet recording device and recording method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that image quality is sometimes adversely affected depending on the recording image, in an inkjet recording device in which recording is effected onto a nonporous recording medium using aqueous ink. <P>SOLUTION: Disclosed is an inkjet recording device wherein recording on a nonporous recording medium (50) is performed using aqueous ink, while the recording medium is conveyed into a recording region (55) facing the recording head (9). Prior to recording, the recording medium is heated in a region (54) on the upstream side of the recording region, in relation to the conveyance direction of the recording medium; during recording, the recording medium is heated in the recording region; and, after recording, the recording medium is heated in a region (56) on the downstream side of the recording region, in relation to the conveyance direction of the recording medium. Control is performed so that the surface temperature of the recording medium in the region on the downstream side is higher than the surface temperature of the recording medium in the recording region, and in the region on the upstream side, and so that the surface temperature of the recording medium in the recording region is higher than the temperature of the recording head. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus and a recording method thereof.

  2. Description of the Related Art Conventionally, an ink jet recording apparatus that performs recording on a recording medium by ejecting ink droplets from nozzles provided in a recording head is known.

  Among ink jet recording apparatuses, there are some which are intended to record on an untreated non-porous recording medium which is not coated with, for example, polyvinyl chloride (PVC) or polyethylene terephthalate (PET). Such an ink jet recording apparatus generally uses a so-called solvent ink using a solvent-based main solvent, or a so-called UV ink containing a component that is cured by ultraviolet rays (UV).

  However, in recent years, from the viewpoint of environmental considerations, in an inkjet recording apparatus for recording on a non-porous recording medium, instead of an inkjet recording apparatus using solvent ink or an inkjet recording apparatus using UV ink, An ink jet recording apparatus using water-based ink containing water as a main solvent and its technology have been disclosed.

  On the other hand, in order to appropriately fix the ink that has landed on the recording medium, a technique is disclosed in which the recording medium is heated at least before or during recording or after recording to prevent deterioration in the image quality of the recorded image. For example, Patent Document 1 and Patent Document 2 disclose an ink jet recording apparatus provided with means for heating a recording medium before recording, during recording, and after recording.

  In particular, when recording on a non-porous recording medium using an ink jet recording apparatus, it is often difficult to appropriately fix the ink that has landed on the recording medium. Therefore, ink jet recording for recording on a non-porous recording medium equipped with a technique for heating a recording medium before recording, during recording or at least after recording, and preventing deterioration in image quality of the recorded image There is a device.

JP 2007-62115 A Japanese Patent Laid-Open No. 10-86353

  However, in a conventional ink jet recording apparatus intended for recording on a non-porous recording medium, the image quality of the recorded image may be degraded, for example, beading may occur depending on the recorded image.

  In addition, volatile components are more volatile in aqueous inks than solvent inks and the like. This is because the volatility of water as the main solvent is overwhelmingly higher than the volatility of the solvent as the main solvent of the solvent ink. Therefore, in particular, in an ink jet recording apparatus that records on a non-porous recording medium using water-based ink, it is necessary to improve the image quality of the recorded image while effectively suppressing the volatilization of volatile components from the nozzles of the recording head. Both of these are difficult to achieve. For this reason, in particular, an ink jet recording apparatus that records on a non-porous recording medium using a conventional water-based ink may have a reduced image quality depending on the recorded image.

  Accordingly, the present invention has been made to solve the above-described problems, and is an ink jet recording apparatus that records on a non-porous recording medium using water-based ink, and prevents image quality from being deteriorated by a recorded image. An object of the present invention is to provide an ink jet recording apparatus that can perform the above-described operation.

  Furthermore, it aims at providing the recording method.

  The present invention for solving the above-described problems is an inkjet recording apparatus that records on a non-porous recording medium using aqueous ink while transporting the recording medium to a recording area facing the recording head. A first heating unit that heats the recording medium in a region upstream of the recording region with respect to a conveyance direction of the recording medium, and the recording that is heated in the recording region by the first heating unit. A second heating means for heating a heating area of the medium during recording by the recording head; and a recording medium recorded by the recording head in an area downstream of the recording area with respect to a conveyance direction of the recording medium. A third heating means for heating the area; and a surface temperature of the recording medium in the downstream area is higher than a surface temperature of the recording medium in the upstream area and the recording area. And control means for controlling at least one of the first to third heating means so that the surface temperature of the recording medium in the recording area is higher than the temperature of the recording head; It is characterized by providing.

  Another aspect of the present invention for solving the above-described problems is to record on a non-porous recording medium using water-based ink while transporting the recording medium to a recording area facing the recording head. A recording method for an ink jet recording apparatus, comprising: a first heating step in which the recording medium is heated by a first heating unit in a region upstream of the recording region with respect to a conveyance direction of the recording medium; A second heating step for heating the heating area of the recording medium heated by the first heating means during recording by the recording head; and an area downstream of the recording area with respect to the conveyance direction of the recording medium And a third heating step for heating a region of the recording medium recorded by the recording head, wherein at least one of the first to third heating steps The surface temperature of the recording medium in the downstream area is higher than the surface temperature of the recording medium in the upstream area and the recording area, and the surface temperature of the recording medium in the recording area is that of the recording head. The first heating means, the second heating means, and the third heating means are controlled so as to be higher than the temperature.

  According to the present invention, in an ink jet recording apparatus that records on a non-porous recording medium using water-based ink, it is possible to prevent the image quality from being deteriorated due to a recorded image.

1 is a front view schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention. 1 is a cross-sectional view schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention. 1 is a block diagram schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention. It is a flowchart which shows preferable embodiment of the recording method of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention.

  As shown in FIG. 1, the ink jet recording apparatus 1 of the present embodiment arranges a sheet-like non-porous recording medium 50 horizontally and conveys it in the depth direction of the paper surface of FIG. 1. Images, characters, etc. corresponding to the recording data are recorded on the surface of the.

  The inkjet recording apparatus 1 includes a transport unit 40 that transports the recording medium 50 and a recording unit 41 that records on the recording medium 50. The recording head 9 includes a recording head 9 that performs reciprocating scanning in a direction orthogonal to the conveyance direction of the recording medium 50, and a cleaning unit 10 that cleans the recording head 9. In addition, the inkjet recording apparatus 1 includes a control unit 20 (see FIG. 3) that controls the entire apparatus including reception of recording data and control of a recording operation.

  The transport unit 40 includes a plurality of pinch rollers 3 that are rotated about a horizontal axis along the paper surface by a motor 5 on the substantially flat platen 2 that extends in the depth direction of the paper surface of FIG. A plurality of grid rollers 4 supported by these pinch rollers 3 so as to be rotatable about a rotation axis parallel to the rotation axis of the pinch roller 3 are arranged facing the pinch rollers 3. These grid rollers 4 are aligned above the platen 2 in a horizontal plane extending in the depth direction in FIG. 1 to form a conveyance path for the recording medium 50.

  The recording unit 41 includes a carriage rail 7 that extends in a direction perpendicular to the conveyance direction of the recording medium 50 above the conveyance unit 40 and the cleaning unit 10, and a recording head that is movable along the carriage rail 7. Unit 8 is provided. In addition, a motor 6 that reciprocally moves the recording head unit 8 on the carriage rail 7 so as to be capable of position control and speed control, and an ink cartridge 17 that supplies recording ink to the recording head unit 8 are provided.

  In the present embodiment, the ink cartridge 17 is provided with a plurality of colors of ink for color recording, and can be supplied to the recording head unit 8 for each color via the plurality of ink tubes 16. .

  The recording head unit 8 is provided with a plurality of recording heads 9 on the lower surface side in accordance with the ink color and recording range, and the ink supplied from the ink tube 16 is distributed to the recording heads 9 that perform recording of the same color. Supplied. Further, the recording head unit 8 is provided with a cooling fan 18 for keeping the temperature of each recording head 9 in an appropriate temperature range.

  Although details of the recording head 9 are not shown, an ink chamber for supplying ink to each nozzle and an ejection mechanism using a piezoelectric element are provided. The recording head 9 is configured to be able to perform an idle driving operation in which the ink is ejected and the ink meniscus of the nozzle is finely oscillated by an ejection mechanism using the piezoelectric element. Further, the nozzles can be provided with an appropriate number and arrangement pitch according to the configuration of the ejection mechanism, the recording pixel pitch, and the like. For example, a large number of nozzles such as 256 can be arranged. The recording head 9 of this embodiment uses a piezoelectric element as the recording element, but may be a recording head using a heater as the recording element.

  Position control and speed control of the motor 6 are performed according to a control signal from the control unit 20, and the motor 6 reciprocates the recording head unit 8 on the recording medium 50 at a predetermined speed during a recording operation. Further, the motor 6 can move the recording head unit 8 to a predetermined cleaning position in the cleaning unit 10 during the cleaning operation.

  In this embodiment, the cleaning unit 10 includes a suction cleaning unit 14A that cleans the recording head 9 by sucking the ink in the recording head 9 from the nozzles to the outside, and the recording head 9 by wiping the recording head surface. It consists of a wipe part 14B to be cleaned. The cleaning unit 10 is arranged on the moving path of the recording head unit 8 on the side of the transport unit 40 and below the recording unit 41 in the order of the wipe unit 14B and the suction cleaning unit 14A from the transport unit 40 side. In the present embodiment, the upper positions of the suction cleaning unit 14A and the wipe unit 14B are predetermined cleaning positions.

  The schematic configuration of the suction cleaning unit 14A includes a cap 11, a cap drive unit (not shown), a suction pump 12, a pump drive unit (not shown), an air release valve (not shown), and an air release valve drive unit (not shown). Become.

  Among these, at least the cap 11 is provided for each recording head 9. However, the cap drive unit, the suction pump 12, the air release valve, and the air release valve drive unit may be configured to be provided for each of the plurality of caps 11 when each operation can be made common for each recording head 9. .

  The cap drive unit moves up and down to selectively switch the position of the cap 11 in the vertical direction, and includes, for example, appropriate mechanical, electromagnetic, and fluid lifting means. Therefore, the cap drive unit moves the cap 11 up and down in the vertical direction with respect to the recording head unit 8 which is moved on the carriage rail 7 by the motor 6 and positioned above the suction cleaning unit 14A, and the cap 11 performs recording. The state where the head surface is sealed and the state where the sealing is released can be switched.

  The suction pump 12 is for sucking contents such as air and ink in the suction space and discharging them to the outside of the suction space, and an appropriately configured fluid pump such as a rotary pump can be adopted. In this embodiment, the suction amount can be varied by the pump drive unit. Further, the suction amount of the suction pump 12 may be changed in multiple stages as necessary. The suction pump 12 has a suction port connected to the suction pipe and a discharge port connected to the discharge pipe. The other end of the discharge pipe is connected to the waste liquid bottle 15.

  In the suction cleaning unit 14A, the cap driving unit, the air release valve driving unit, and the pump driving unit are electrically connected to a cleaning control unit (not shown), and their operations are controlled by control signals from the cleaning control unit. It has become so.

The wipe unit 14B may have any configuration as long as it performs a known wiping process. For example, it is possible to employ a configuration in which the recording head surface is wiped by relatively moving a wiping blade containing a wiping liquid on the recording head surface of the recording head 9 moved above the wiping portion 14B.

  FIG. 2 is a cross-sectional view schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention. Supplementally, FIG. 2 is a cross-sectional view from the side of the inkjet recording apparatus 1 shown in FIG. 1, the recording head 9 is scanned in the depth direction of the drawing, and the recording medium 50 is conveyed in the direction of the arrow in FIG. .

  In FIG. 2, a recording area 55 faces the recording head 9, and recording is performed on the recording medium 50 in this area. The recording area 55 is also a print heat area for heating the recording medium 50 during recording. The preheat area 54 is an area upstream of the recording area 55 in the conveyance direction of the recording medium 50, and heats the recording medium 50 before recording. The after heat area 56 is an area downstream of the recording area 55 in the conveyance direction of the recording medium 50, and heats the recording medium 50 after recording.

  A preheater 51 as a first heating unit heats the recording medium 50 in the preheat region 54. The print heater 52 as the second heating unit heats the recording medium 50 in the recording area 55. An after heater 53 as a third heating unit heats the recording medium 50 in the after heat region 56. In the present embodiment, the preheat region, the print heat region, and the afterheat region are heated from the back side (back surface) of the recording surface of the recording medium. However, heating is performed from the recording surface side (front surface) of the recording medium. It is also possible to adopt a configuration that does this.

  FIG. 3 is a block diagram schematically showing a schematic configuration of an ink jet recording apparatus according to a preferred embodiment of the present invention.

  In FIG. 3, reference numeral 20 denotes a control unit. The control unit 20 includes a CPU 25 that executes processing operations such as calculation, control, determination, and setting, a ROM 26 that stores a control program to be executed by the CPU 25, and a recording data A RAM 27 and the like used as a work area for processing by the buffer and CPU 25 are provided. The control unit 20 includes an EEPROM 28 that is a rewritable nonvolatile memory.

  The control unit 20 inputs recording data from an external host computer via the input unit 23 and drives the recording head 9 via the recording head driving unit 22 according to the recording data. Further, the control unit 20 controls the recording operation by driving the transport unit 40 and transporting the recording medium 50 simultaneously with the driving of the recording head. Also, the user can select the type of recording medium to be used from an external host computer via the input unit 23.

  The recording head 9 is provided with a temperature sensor 21, and the control unit 20 can read the temperature of the temperature sensor 21. The control unit 20 controls the temperature of the recording head by driving the cooling fan 18 so that the temperature of the recording head is in a predetermined temperature range. The predetermined temperature range is preferably 20 ° C. or higher and 40 ° C. or lower. In this embodiment, the predetermined temperature range is 25 ° C. or higher and 35 ° C. or lower, which is a more preferable temperature range. In the inkjet recording apparatus 1 of the present embodiment, the temperature range can be set by the user from an external host computer via the input unit 23, or can be set by the user using the operation panel 24. Is possible.

  In accordance with the type of the recording medium 50 to be used, the control unit 20 sets the preheater 51, the print heater 52, and the afterheater 53 so that the surface temperature of the recording medium 50 in the preheat area, the print heat area, and the afterheat area is predetermined. The temperature is controlled to be The control unit 20 controls the preheater 51, the print heater 52, and the afterheater 53 by reading the temperature detected by the temperature sensors 57 to 59 provided in the vicinity of each heater. In the ink jet recording apparatus 1 of the present embodiment, the set temperature of each heater corresponding to the type of the recording medium is stored in the ROM 26 and the EEPROM 28, and the control unit 20 performs control so that each heater becomes the set temperature. To do. In the present embodiment, correspondence between the preheater 51, the print heater 52, and the afterheater 53 and the surface temperature of the recording medium in the preheat region, the print heat region, and the afterheat region is taken in advance for each type of recording medium. The control unit 20 performs control so that each heater has the set temperature according to the recording medium selected by the user. Furthermore, in the inkjet recording apparatus 1 of the present embodiment, the user can reset the set temperature of each heater stored in the EEPROM 28 from an external host computer via the input unit 23. It can also be reset by the operation panel 24.

  Further, the surface temperature of the preferred recording medium in the preheating region is 40 ° C. or higher and 60 ° C. or lower. Correspondingly, a preferable set temperature of the preheater 51 is 40 ° C. or more and 70 ° C. or less. A preferable surface temperature of the recording medium in the print heat region is 40 ° C. or more and 60 ° C. or less. Correspondingly, a preferable set temperature of the print heater 51 is 40 ° C. or higher and 70 ° C. or lower. A preferable surface temperature of the recording medium in the after heat region is 60 ° C. or higher and 120 ° C. or lower. Correspondingly, a preferable set temperature of the preheater 51 is 60 ° C. or higher and 130 ° C. or lower.

  The ink jet recording apparatus 1 according to the present embodiment further includes a roller heater 60 that heats the pinch roller 3 and the grid roller 4. This is to prevent the surface temperature of the recording medium 50 from being lowered by contacting the pinch roller 3 and the grid roller 4 when the recording medium 50 is conveyed from the preheat area to the print heat area.

  Next, the outline of the present invention will be described.

  The present invention is an ink jet recording apparatus for recording on a non-porous recording medium using water-based ink. The ink jet recording apparatus of the present invention is characterized in that the recording medium is heated in the preheat region, the print heat region, and the afterheat region.

  By heating the recording medium in the print heat region, water in the ink is first volatilized during recording. Thus, immediately after landing on the recording medium, the water in the ink is volatilized, and the ink that has landed on the recording medium is difficult to move on the recording medium. And it suppresses that the ink dots which landed on the recording medium contact non-uniformly and beading generate | occur | produces.

  In addition, by heating the recording medium in the preheat region, recording is performed on the recording medium that has been sufficiently heated from the start of recording, and moisture volatilization in the ink becomes effective at the time of recording. Further, the moisture of the recording medium is volatilized before recording, and the moisture volatilization in the ink becomes effective at the time of recording. In other words, it becomes possible to suppress the occurrence of beading more effectively due to the effective evaporation of moisture in the ink during recording. It is preferable that the surface temperature of the recording medium in the preheat region and the print heat region be substantially equal. By equalizing the surface temperature of the recording medium in these areas, the expansion and contraction of the recording medium that occurs when the recording medium is transported from the preheat area to the print heat area and the temperature of the recording medium changes is suppressed, and the image quality of the recorded image is reduced. This is because the decrease is suppressed.

  In the present invention, the surface temperature of the recording medium in the afterheat region is higher than the surface temperature of the recording medium in the preheat region and the print heat region, and the surface temperature of the recording medium in the print heat region is higher than the temperature of the recording head. It is characterized by being controlled to be higher.

  The water-based ink used in the present invention uses water as the main solvent, and water is more volatile than common solvents. Therefore, in order to effectively suppress the volatilization of volatile components from the nozzles of the recording head, the recording head It is necessary to control the temperature so that it does not become too high. This is because if the temperature of the recording head becomes too high, the ink in the nozzles may become clogged, resulting in defective ejection. On the other hand, in heating the recording medium in the print heat region, it is necessary to effectively volatilize the water in the ink that has landed on the recording medium. Therefore, it is preferable that the heating of the recording medium in the print heat region is high. Therefore, in the present invention, in order to achieve both of these, the surface temperature of the recording medium in the print heat region is controlled to be higher than the temperature of the recording head.

  In addition, by heating the recording medium in the after heat region, the ink is fixed to the recording medium after the recording is completed. This fixing is performed, for example, by volatilization of a solvent contained in the ink or curing of a resin such as a binder resin in the ink. It is effective to perform such solvent volatilization and resin curing at a temperature higher than the temperature for volatilizing water. Therefore, in the present invention, control is performed so that the surface temperature of the recording medium in the afterheat region is higher than the surface temperature of the recording medium in the preheat region and the print heat region.

  In the present embodiment, such control is performed by controlling at least one of the preheater 51, the print heater 52, and the afterheater 53 by the control unit 20.

  The surface temperature of the recording medium can be easily measured with an external thermometer. For this reason, the preheater 51, the print heater 52, and the afterheater 53 are set at different temperatures by measuring the surface temperature of the recording medium with respect to the temperature setting value of each heater using different types of recording media in advance. Can lead to a set temperature. It is preferable to store in the ROM 26 and the EEPROM 28 appropriate set temperatures for each type of recording medium thus derived.

  Next, the ink used in the ink jet recording apparatus of the present invention will be described.

  The ink used in the ink jet recording apparatus of the present invention is a water-based ink containing water as a main solvent. If it is a water-based ink, there will be no limitation in particular. However, the ink jet recording apparatus of the present invention is intended to record on a non-porous recording medium, and can be used, for example, for outdoor sign use. For this reason, it is preferable to use an ink that enhances the performance of the recorded matter. Therefore, it is preferable that the colorant contains a pigment having a higher property than the dye. In addition, it is preferable to contain a resin such as a binder resin so that the recorded matter has high stringency. In particular, it is preferable to contain a resin that forms a film at a predetermined temperature. Using an ink containing such a resin, the temperature of the recording head is set lower than the temperature at which the resin is formed, and the surface temperature of the recording medium in the after heat region is set higher than the temperature at which the resin is formed. This is because it is possible to obtain a recorded matter with higher prisonability.

  Next, the recording method of the present invention will be described.

  FIG. 4 is a flowchart showing a preferred embodiment of the recording method of the present invention.

  In step S110, the ink jet recording apparatus 1 first receives data such as a recording medium selection result and recording data from a host computer.

  Next, in step S120, the control unit 20 starts heating the preheater 51, the print heater 52, and the after heater 53 so that the set temperature corresponds to the type of the selected recording medium. That is, in this step S120, the recording medium is heated in the preheating region before the start of recording. The heating temperature of the after heater 53 is set to be higher than the heating temperatures of the preheater 51 and the print heater 52. The heating temperature of the preheater 51 is set to the same temperature as the heating temperature of the print heater 52. Further, the heating temperature of the print heater 52 is set so that the surface temperature of the recording medium in the recording area (print heat area) assumed in advance is higher than the temperature of the recording head during recording. .

  Next, in step S130, after each heater reaches the set temperature, the conveyance and recording operation of the recording medium is started. That is, in this step S130, the heating area of the recording medium heated in step S120 is conveyed to the recording area (print heat area), and recording is performed at the same time as the heating area is heated in the recording area.

  Next, in step S140, the image forming area of the recording medium on which the recording image is formed in the recording area is conveyed to the after heat area, and the image forming area of the recording medium is heated in the after heat area.

  The ink jet recording apparatus and the recording method of the present invention can be used for a general ink jet recording apparatus.

DESCRIPTION OF SYMBOLS 1 Recording device 9 Recording head 20 Control part 51 Preheater 52 Print heater 53 After heater 54 Preheat area 55 Recording area (print heat area)
56 After Heat Area

Claims (8)

An ink jet recording apparatus for recording using a water-based ink while transporting the recording medium to a recording area facing a recording head with respect to a non-porous recording medium,
First heating means for heating the recording medium in an area upstream of the recording area with respect to the conveyance direction of the recording medium;
A second heating means for heating the recording area of the recording medium heated by the first heating means in the recording area during recording by the recording head;
A third heating means for heating an area of the recording medium recorded by the recording head in an area downstream of the recording area with respect to a conveyance direction of the recording medium;
The surface temperature of the recording medium in the downstream area is higher than the surface temperature of the recording medium in the upstream area and the recording area, and the surface temperature of the recording medium in the recording area is that of the recording head. Control means for controlling at least one of the first to third heating means so as to be higher than the temperature;
An ink jet recording apparatus comprising:   The control means controls at least one of the first and second heating means so that the surface temperature of the recording medium in the upstream area and the recording area is substantially equal. The inkjet recording apparatus according to claim 1.   The inkjet recording apparatus according to claim 1, wherein the control unit controls the first heating unit to 40 ° C. or more and 70 ° C. or less.   4. The ink jet recording apparatus according to claim 1, wherein the control unit controls the second heating unit to 40 ° C. or more and 70 ° C. or less. 5.   5. The ink jet recording apparatus according to claim 1, wherein the control unit controls the third heating unit to 60 ° C. or more and 130 ° C. or less.   The inkjet recording apparatus according to claim 1, further comprising a cooling unit that cools the recording head.   The water-based ink contains a resin that forms a film at a predetermined temperature, the temperature of the recording head is lower than the predetermined temperature, and the surface temperature of the recording medium in the downstream region is higher than the predetermined temperature. The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus is an ink jet recording apparatus. A non-porous recording medium, a recording method of an ink jet recording apparatus for recording using a water-based ink while transporting the recording medium to a recording area facing a recording head,
A first heating step of heating the recording medium by a first heating means in a region upstream of the recording region with respect to the conveyance direction of the recording medium;
A second heating step of heating the recording area heated by the first heating means in the recording area during recording by the recording head;
A third heating step of heating the area of the recording medium recorded by the recording head in an area downstream of the recording area with respect to the conveyance direction of the recording medium,
In at least one of the first to third heating steps, the surface temperature of the recording medium in the downstream region is higher than the surface temperature of the recording medium in the upstream region and the recording region. The first heating means, the second heating means, and the third heating means are controlled so that the surface temperature of the recording medium in the recording area is higher than the temperature of the recording head. Recording method.

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