JP2014048033A - Drying system and drying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drying system and a drying method which can simultaneously achieve both an improvement in quality of a coated film on a substrate and prevention of an explosion inside a dryer in a manner that increases a discharge volume of gas to some extent and maintains a discharge speed of the gas at a predetermined target value by adjusting each of the discharge volume and the discharge speed of the gas discharged from a gas supply device.SOLUTION: A control device 40 of a drying system 10 controls a gas supply device 11 so that the same discharges gas with a discharge volume adjusted to allow a solution concentration measured by a solution concentration meter 24 to be lower than a predetermined limit value. The control device 40 also controls an aperture opening adjustment mechanism 16 so that an aperture of an opening section of the gas supply device 11 is adjusted to allow a discharge speed of the gas measured by an anemometer 22 to be a predetermined target value when the gas supply device 11 discharges the gas with the adjusted discharge volume.

Description

  The present invention relates to a drying system and a drying method for performing drying by sending a gas such as hot air to a base material coated with a coating liquid.

  Conventionally, when applying and drying a coating solution on a sheet-like or belt-like substrate, drying with hot air is mainly performed in the drying step. Here, the drying process by the conventional dryer can be roughly divided into two parts, a constant rate drying period in the first half and a decreasing rate drying period in the second half. Most of the solvent in the coating solution applied onto the substrate evaporates during the first constant rate drying period. Here, in order to dry the solvent more efficiently, it is effective to increase the wind speed of gas such as hot air sent to the base material during the constant rate drying period. As a method of increasing the wind speed of the gas fed into the substrate, there are a method of sending gas from a nozzle having a small opening area such as a slit nozzle, and a method of increasing the output of the fan for supplying the gas, specifically, the rotational speed. Conceivable.

  However, if the wind velocity of the gas sent to the base material is increased too much, the surface of the coating liquid applied to the base material is disturbed, or the skin phenomenon (only the surface of the coating liquid applied to the base material is dried) In addition, there is a risk that a large amount of solvent will remain in the coating solution. For this reason, parallel flow drying in which a gas is sent substantially parallel to the substrate is widely used.

  On the other hand, because a lot of solvent evaporates from the coating solution applied to the substrate in the constant rate drying period, especially when the coating film is thick or the coating area is large, in the vicinity of the inlet in the dryer, The concentration of the solvent evaporated from the coating solution may become extremely high. In particular, if the amount of gas such as hot air sent to the substrate is too small, the solvent of the evaporated coating solution in the atmosphere around the substrate will stay and increase its concentration. If the concentration exceeds a certain value (explosion limit), there is a risk of explosion, making it extremely dangerous.

  In order to prevent such an explosion of the solvent evaporated from the coating liquid, an inerting may be performed such that the inside of the dryer is filled with an inert gas such as nitrogen. However, in order to perform such inerting, incidental facilities are required, and it may be difficult to implement inerting from the viewpoint of running cost.

  In addition, methods disclosed in Patent Documents 1 to 3 are known as methods for adjusting the solvent concentration and the gas wind speed in the atmosphere around the substrate. However, these documents do not disclose a method for adjusting both the air volume and the air speed of a gas such as hot air discharged from the gas supply unit of the dryer to an appropriate value. Conventionally, a technology for simultaneously solving both the problems of improving the quality of the product and preventing the explosion in the dryer has not been known.

Utility model registration No. 2009889 Utility Model Registration No. 2009913 Japanese Utility Model Publication No. 58-124791

  The present invention has been made in view of such points, and adjusts the discharge air volume and the wind speed of the gas discharged from the gas supply device, respectively, to increase the gas discharge air volume to some extent and to set the wind speed to a predetermined target. It is an object of the present invention to provide a drying system and a drying method capable of simultaneously solving the two problems of improving the quality of a coating film of a base material and preventing explosion in a dryer by maintaining the value.

  Another object of the present invention is to provide a drying system and a drying method capable of preventing an explosion in a dryer by adjusting the amount of gas discharged from a gas supply device and increasing the amount of gas discharged to some extent. Is to provide.

  The drying system of the present invention is a drying system that performs drying by sending a gas to a substrate on which a coating liquid has been applied, and includes a gas supply device that discharges gas through an opening, and an opening of the gas supply device An opening degree adjusting mechanism for adjusting the opening degree of the part, an anemometer that measures the wind speed of the gas discharged from the gas supply device, and evaporation in the atmosphere around the substrate coated with the coating liquid A solvent concentration meter that measures the solvent concentration of the applied coating solution, and a control device that controls the gas supply device and the opening degree adjustment mechanism. The control device is a solvent that is measured by the solvent concentration meter. When adjusting the discharge air volume of the gas discharged from the gas supply device so that the concentration becomes smaller than a predetermined limit value, and when the gas is discharged from the gas supply device with the adjusted discharge air volume, The gas supply device and the opening degree of opening are adjusted so that the opening degree of the opening part of the gas supply apparatus is adjusted by the opening degree adjustment mechanism so that the wind speed of the gas measured by the speedometer becomes a predetermined target value. The adjustment mechanism is controlled.

  According to such a drying system, by adjusting the amount of gas discharged from the gas supply device, it is possible to prevent the solvent concentration of the evaporated coating liquid from increasing and causing an explosion, and By maintaining the wind speed of the gas discharged from the gas supply device at a predetermined target value, the quality of the coating film on the substrate can be improved. As described above, according to the drying system as described above, the discharge air volume and the wind speed of the gas discharged from the gas supply device are respectively adjusted, the gas discharge air volume is increased to some extent, and the wind speed is maintained at a predetermined target value. Thus, the two problems of improving the quality of the coating film on the substrate and preventing explosion in the drying system can be solved at the same time.

  In the drying system of the present invention, when the solvent concentration measured by the solvent concentration meter exceeds a predetermined limit value, the control device increases the discharge air volume of the gas discharged from the gas supply device. The gas supply device may be controlled.

  In the drying system of the present invention, when the amount of gas discharged from the gas supply device increases, the control device increases the opening degree of the gas supply device by the opening degree adjustment mechanism. You may come to control the said opening part opening degree adjustment mechanism so that it may enlarge.

  The drying system of the present invention may further include setting means for setting a target value of the wind speed of the gas discharged from the gas supply device.

  In the drying system of the present invention, the drying system further includes a moving mechanism that moves the gas supply device toward and away from the substrate on which the coating liquid is applied, and the control device is measured by the anemometer. In order to set the gas wind speed to a predetermined target value, the opening degree of the opening of the gas supply device is adjusted by the opening degree adjustment mechanism and between the base material and the gas supply device by the moving mechanism. The moving mechanism may be further controlled to adjust the distance.

  Another drying system of the present invention is a drying system that performs drying by sending a gas to a substrate coated with a coating liquid, and a gas supply device that discharges the gas, and a substrate coated with the coating liquid. A moving mechanism that moves the gas supply device in a direction toward and away from the air supply device, an anemometer that measures a wind speed of the gas discharged from the gas supply device, and an atmosphere around the substrate coated with the coating liquid A solvent concentration meter for measuring the solvent concentration of the evaporated coating liquid, and a control device for controlling the gas supply device and the moving mechanism, wherein the control device has a solvent concentration measured by the solvent concentration meter. The discharge air volume of the gas discharged from the gas supply device is adjusted so as to be smaller than a predetermined limit value, and the gas is discharged from the gas supply device with the adjusted discharge air volume. The gas supply device and the moving mechanism so that the distance between the base material and the gas supply device is adjusted by the moving mechanism so that the wind speed of the gas measured by the anemometer sometimes becomes a predetermined target value. Is to control.

  Even in such a drying system, it is possible to prevent an explosion from occurring due to an increase in the solvent concentration of the evaporated coating liquid by adjusting the discharge air volume of the gas discharged from the gas supply device. By maintaining the wind speed of the gas discharged from the supply device at a predetermined target value, the quality of the coating film of the substrate can be improved. As described above, according to the drying system as described above, the discharge air volume and the wind speed of the gas discharged from the gas supply device are respectively adjusted, the gas discharge air volume is increased to some extent, and the wind speed is maintained at a predetermined target value. Thus, the two problems of improving the quality of the coating film on the substrate and preventing explosion in the drying system can be solved at the same time.

  Still another drying system of the present invention is a drying system that performs drying by sending a gas to a substrate coated with a coating solution, and includes a gas supply device that discharges gas and a substrate coated with the coating solution A solvent concentration meter for measuring the solvent concentration of the evaporated coating liquid in a surrounding atmosphere, and a control device for controlling the gas supply device, wherein the control device measures the solvent concentration measured by the solvent concentration meter. The gas supply device is controlled so as to adjust the discharge air volume of the gas discharged from the gas supply device so as to be smaller than a predetermined limit value.

  In such a drying system, explosion in the drying system can be prevented by adjusting the amount of gas discharged from the gas supply device and increasing the amount of gas discharged to some extent.

  The drying method of the present invention is a drying method in which a gas is supplied to a substrate on which a coating liquid has been applied, and drying is performed, wherein the gas is supplied to the substrate on which the coating liquid has been applied by a gas supply device; A step of measuring the solvent concentration of the evaporated coating liquid in the atmosphere around the substrate on which the liquid is applied, and a gas discharged from the gas supply device so that the measured solvent concentration is smaller than a predetermined limit value Adjusting the discharge air amount of the gas, and supplying the gas so that the air velocity of the gas discharged from the gas supply device becomes a predetermined target value when gas is discharged from the gas supply device with the adjusted discharge air amount Adjusting the opening of the opening of the apparatus.

  Another drying method of the present invention is a drying method in which gas is supplied to a base material coated with a coating solution, and the step of feeding the gas to the base material coated with the coating solution by a gas supply device; A step of measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate coated with the coating solution, and the gas supply device is discharged so that the measured solvent concentration becomes smaller than a predetermined limit value. Adjusting the discharge air volume of the gas, and when the gas supply apparatus discharges the gas with the adjusted discharge air volume, the air speed of the gas discharged from the gas supply apparatus becomes a predetermined target value. Adjusting the distance between the gas supply device and the substrate.

  Still another drying method of the present invention is a drying method in which gas is supplied to a base material coated with a coating liquid, and drying is performed by supplying a gas to the base material to which the coating liquid is applied by a gas supply device. And a step of measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate coated with the coating solution, and discharging from the gas supply device so that the measured solvent concentration becomes smaller than a predetermined limit value. Adjusting the amount of gas discharged.

  According to the drying system and the drying method of the present invention, by adjusting the discharge air volume and the wind speed of the gas discharged from the gas supply device, respectively increasing the gas discharge air volume to some extent and maintaining the wind speed at a predetermined target value. The two problems of improving the quality of the coating film on the substrate and preventing explosion in the dryer can be solved simultaneously.

  According to another drying system and drying method of the present invention, by adjusting the amount of gas discharged from the gas supply device and increasing the amount of gas discharged to some extent, explosion in the dryer can be prevented. it can.

It is a schematic block diagram which shows the structure of the drying system by embodiment of this invention. It is a figure when the nozzle and base material of the gas supply apparatus in the drying system shown in FIG. 1 are seen from the right side. It is a flowchart which shows the drying method by the drying system shown in FIG. It is a table | surface which shows the various setting conditions and experimental result of the drying system in an Example.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are diagrams showing a drying system and a drying method according to the present embodiment. Among these, FIG. 1 is a schematic configuration diagram showing the configuration of the drying system according to the present embodiment, and FIG. 2 is a view of the nozzle and the base material of the gas supply device in the drying system shown in FIG. FIG. FIG. 3 is a flowchart showing a drying method by the drying system shown in FIG.

  The drying system 10 according to the present embodiment performs drying by sending a gas such as hot air (specifically, for example, air) to the base material 30 on which the coating liquid 32 has been applied. As shown in FIG. 1, the drying system 10 includes a gas supply device 11 that sends a gas to the base material 30 on which the coating liquid 32 is applied. The gas supply device 11 includes a fan 12 and a nozzle 14 that discharges the gas sent from the fan 12 toward the base material 30. The nozzle 14 is provided with a rectifying plate 14 a having a honeycomb structure, and the gas is fed substantially parallel to the base material 30 by the rectifying plate 14 a.

  As shown in FIG. 1, the nozzle 14 is provided with an opening degree adjustment mechanism 16 for adjusting the opening degree of the opening of the nozzle 14. As shown in FIGS. 1 and 2, the opening degree adjustment mechanism 16 is movable in the vertical direction by a ball screw or the like, and the opening degree adjustment mechanism 16 moves in the vertical direction. The opening degree of the opening is adjusted.

  Further, the nozzle 14 has a moving mechanism 18 that moves the nozzle 14 in a direction approaching the right side (right direction in FIG. 1) and a direction away from the base material 30 to which the coating liquid 32 is applied (left direction in FIG. 1). Is provided. More specifically, as shown in FIG. 1, the guide rail 20 is provided so as to extend along the direction approaching and moving away from the base material 30 to which the coating liquid 32 is applied (the left-right direction in FIG. 1). The moving mechanism 18 moves on the guide rail 20 in the left-right direction in FIG.

  An anemometer 22 that measures the wind speed of the gas discharged from the nozzle 14 is provided in the vicinity of the opening of the nozzle 14. The anemometer 22 includes, for example, a thermal anemometer or a vane anemometer. A solvent concentration meter 24 for measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate 30 is provided above the substrate 30 to which the coating solution 32 is applied. Here, the solvent concentration meter 24 is composed of, for example, a PID (Photo-Ionization Detector) sensor.

  As shown in FIG. 1, the base material 30 coated with the coating liquid 32 and the nozzle 14 of the gas supply device 11 are covered with a casing 26. The casing 26 is provided with an exhaust fan 28, and the exhaust fan 28 exhausts the inside of the casing 26. Here, the inside of the casing 26 is maintained at a slightly negative pressure.

  Further, the drying system 10 of the present embodiment is provided with a control device 40 for controlling the fan 12, the opening degree adjusting mechanism 16 and the moving mechanism 18 of the gas supply device 11, respectively. As shown in FIG. 1, the fan 12, the opening degree adjustment mechanism 16, the moving mechanism 18, the anemometer 22, and the solvent concentration meter 24 are connected to the control device 40. Information related to the measurement result by 24 is sent to the control device 40. Further, the control device 40 sends control signals to the fan 12, the opening degree adjustment mechanism 16 and the movement mechanism 18, respectively, thereby controlling the fan 12, the opening degree adjustment mechanism 16 and the movement mechanism 18, respectively. To do.

  Next, operation | movement of the drying system 10 which consists of such a structure is demonstrated using the flowchart shown in FIG. The operation of the drying system 10 described below is performed by the control device 40 controlling each component of the drying system 10.

  In the flowchart shown in FIG. 3, an aspect is shown in which the control device 40 controls the fan 12 and the opening degree adjustment mechanism 16. In performing the drying process in the drying system 10, first, the gas is supplied to the base material 30 coated with the coating liquid 32 by the gas supply device 11 (STEP 1). More specifically, a gas such as hot air is supplied to the nozzle 14 by the fan 12, and the gas is sent from the nozzle 14 to the base material 30 to which the coating liquid 32 is applied.

  Here, the control device 40 determines whether or not the solvent concentration of the evaporated coating liquid measured by the solvent concentration meter 24 is smaller than a predetermined limit value (STEP 2). When the solvent concentration measured by the solvent concentration meter 24 exceeds a predetermined limit value (“NO” in STEP 2), the control device 40 increases the fan discharge amount of the gas discharged from the nozzle 14. 12 is controlled (STEP 3). Here, the predetermined limit value is, for example, a value that is 25% or 30% of the lower explosion limit value. When the discharge air volume of the gas discharged from the nozzle 14 increases, the solvent concentration of the evaporated coating liquid in the atmosphere around the substrate 30 can be reduced. Thereby, the explosion of the solvent of the evaporated coating liquid in the drying system 10 can be prevented.

  Further, in the control device 40, it is determined whether or not the wind speed of the gas discharged from the nozzle 14 measured by the anemometer 22 matches a predetermined target value (STEP 4). And when the wind speed of the gas measured by the anemometer 22 is smaller than the predetermined target value (“YES” in STEP 4), the control device 40 makes the opening degree of the opening of the nozzle 14 smaller. The opening degree adjustment mechanism 16 is controlled (STEP 5). Specifically, in FIG. 1 and FIG. 2, the opening degree adjustment mechanism 16 is moved downward to make the opening degree of the opening of the nozzle 14 smaller. As a result, the wind speed of the gas discharged from the nozzle 14 can be increased and brought close to the target value. On the other hand, when the wind speed of the gas measured by the anemometer 22 is larger than the predetermined target value (“YES” in STEP 6), the control device 40 increases the opening degree of the opening of the nozzle 14 so as to increase. The opening degree adjusting mechanism 16 is controlled (STEP 7). Specifically, the opening degree adjustment mechanism 16 is moved upward in FIGS. 1 and 2 to reduce the opening degree of the opening of the nozzle 14. As a result, the wind speed of the gas discharged from the nozzle 14 can be reduced and brought close to the target value. Specifically, when the solvent concentration measured by the solvent concentration meter 24 exceeds a predetermined limit value, the control device 40 controls the fan 12 to increase the amount of gas discharged from the nozzle 14. However, in this case, since the wind speed of the gas discharged from the nozzle 14 also increases, the gas discharged from the nozzle 14 is increased by increasing the opening degree of the opening of the nozzle 14 by the opening opening adjustment mechanism 16. The wind speed is maintained at a predetermined target value.

  Here, when the wind speed of the gas discharged from the nozzle 14 is too larger than the target value, the surface of the coating liquid 32 applied to the base material 30 becomes non-uniform. The problem that the quality of a coating film worsens arises. On the other hand, when the wind speed of the gas discharged from the nozzle 14 is too smaller than the target value, there is a problem that the solvent concentration of the evaporated coating liquid increases. For this reason, it is preferable to maintain the wind speed of the gas discharged from the nozzle 14 at a predetermined target value.

  In performing control to maintain the wind speed of the gas discharged from the nozzle 14 at the target value, the control device 40 controls the opening of the nozzle 14 by the opening opening adjustment mechanism 16 by feedback control such as PID control. The opening degree is adjusted.

  In the present embodiment, the control device 40 controls the opening degree adjustment mechanism 16 to maintain the opening speed of the opening of the nozzle 14 in order to maintain the wind speed of the gas discharged from the nozzle 14 at a predetermined target value. In addition to adjusting the degree, the control device 40 may adjust the distance between the nozzle 14 and the substrate 30 by controlling the moving mechanism 18. For example, as shown in STEP 7, when the opening degree of the opening of the nozzle 14 is increased by the opening degree adjustment mechanism 16, the gas wind speed is still predetermined even when the opening degree of the opening of the nozzle 14 becomes maximum. If the value is larger than the target value, the moving mechanism 18 moves the nozzle 14 away from the base material 30. Thereby, since the distance between the nozzle 14 and the base material 30 also becomes large, the wind speed of the gas at the time of reaching the base material 30 can be reduced.

  In the present embodiment, the control device 40 controls the opening degree adjustment mechanism 16 to maintain the opening speed of the opening of the nozzle 14 in order to maintain the wind speed of the gas discharged from the nozzle 14 at a predetermined target value. Instead of adjusting the degree, the control device 40 may adjust the distance between the nozzle 14 and the base material 30 by controlling the moving mechanism 18. In this case, the opening degree of the opening of the nozzle 14 is not adjusted. Instead, the gas discharged from the nozzle 14 is adjusted by adjusting the distance between the nozzle 14 and the substrate 30 by the moving mechanism 18. The wind speed is maintained at a predetermined target value. That is, the control device 40 adjusts the amount of gas discharged from the nozzle 14 of the gas supply device 11 so that the solvent concentration measured by the solvent concentration meter 24 becomes smaller than a predetermined limit value, and this adjustment is performed. The base material 30 and the nozzle 14 of the gas supply device 11 are set so that the gas wind speed measured by the anemometer 22 becomes a predetermined target value when the gas is discharged from the nozzle 14 of the gas supply device 11 with the discharged air volume. The fan 12 of the gas supply device 11 and the moving mechanism 18 are controlled so as to adjust the distance between them with the moving mechanism 18.

  Control as shown in STEP 1 to STEP 7 by the control device 40 is performed until the drying process of the base material 30 in the drying system 10 is completed (“NO” in STEP 8). When the drying process is completed (“YES” in STEP 8), the operation by the drying system 10 in the present embodiment is completed.

  In the present embodiment, as shown in FIG. 1, setting means 42 for setting a target value of the wind speed of the gas discharged from the nozzle 14 of the gas supply device 11 is connected to the control device 40. By such setting means 42, the operator can use the gas discharged from the nozzle 14 of the gas supply device 11 according to the state of the base material 30 to which the coating liquid 32 is applied and various setting conditions in the drying system 10. The target value of the wind speed can be changed.

  As described above, according to the drying system 10 and the drying method of the present embodiment, the discharge of the gas discharged from the gas supply device 11 so that the solvent concentration measured by the solvent concentration meter 24 becomes smaller than the predetermined limit value. The nozzle 14 of the gas supply device 11 adjusts the air volume, and the gas wind speed measured by the anemometer 22 when the gas is discharged from the gas supply device 11 with the adjusted discharge air volume becomes a predetermined target value. The opening degree of the opening is adjusted by the opening degree adjustment mechanism 16. Thus, by adjusting the discharge air volume of the gas discharged from the gas supply device 11, it is possible to prevent an explosion from occurring due to an increase in the solvent concentration of the coating liquid evaporated from the coating liquid, By maintaining the wind speed of the gas discharged from the nozzle 14 of the gas supply device 11 at a predetermined target value, the quality of the coating film of the substrate 30 can be improved. As described above, according to the drying system 10 and the drying method of the present embodiment, the gas discharge air volume and the wind speed discharged from the gas supply device 11 are adjusted, respectively, and the gas discharge air volume is increased to some extent and the wind speed is adjusted. By maintaining the predetermined target value, the two problems of improving the quality of the coating film of the base material 30 and preventing the explosion in the drying system 10 can be solved simultaneously.

  Further, in the drying system 10 of the present embodiment, when the solvent concentration measured by the solvent concentration meter 24 exceeds a predetermined limit value, the discharge air volume of the gas discharged from the gas supply device 11 is increased. The control device 40 is configured to control the fan 12 of the gas supply device 11. Further, when the discharge air volume of the gas discharged from the nozzle 14 of the gas supply device 11 increases, the opening degree adjustment mechanism 16 controls the opening degree of the nozzle 14 of the gas supply device 11 to be larger. The device 40 controls the opening degree opening adjustment mechanism 16.

  In addition, the drying system 10 and the drying method by this invention are not limited to said aspect, A various change can be added.

  For example, the control device 40 does not necessarily need to control the opening degree opening adjustment mechanism 16 and the moving mechanism 18, and may only control the fan 12 of the gas supply device 11. In this case, the control device 40 adjusts the discharge air volume of the gas discharged from the nozzle 14 of the gas supply device 11 so that the solvent concentration measured by the solvent concentration meter 24 becomes smaller than a predetermined limit value. Thus, the fan 12 of the gas supply device 11 is controlled. Even in the drying system 10 and the drying method according to such a modified example, by adjusting the discharge air volume of the gas discharged from the gas supply device 11, the solvent concentration of the coating liquid evaporated from the coating liquid becomes high and explosion occurs. Can be prevented.

An example of the drying system 10 and the drying method according to the present invention will be described with reference to a table shown in FIG. In this example, a PET film was used as the substrate 30, and a coating liquid 32 composed of a solvent, a resin, and a colorant was applied to the PET film. Then, when the output [Hz] of the fan 12, the air volume [m ³ / min], and the nozzle opening ratio [%] are changed, the air speed [m / s] measured by the anemometer 22 is measured by the solvent concentration meter 24. The concentration of solvent [LEL%] and the surface quality of the coating film of the substrate 30 are shown in the table of FIG.

In the first to third embodiments, the opening of the nozzle 14 is opened by the opening degree adjusting mechanism 16 in accordance with the output [Hz] of the fan 12, that is, the air volume [m ³ / min] of the gas discharged from the nozzle 14. The degree (nozzle opening ratio) was changed. In this case, the gas wind speed [m / s] measured by the anemometer 22 is maintained at a predetermined target value of 1 [m / s], and the surface quality of the coating film of the substrate 30 is good. It became a thing.

On the other hand, in Comparative Examples 1 to 3, even when the output [Hz] of the fan 12, that is, the air volume [m ³ / min] of the gas discharged from the nozzle 14 is changed, the opening degree of the nozzle 14 (nozzle opening) Rate) remained constant. In this case, as the air volume of the gas discharged from the nozzle 14 increases, the wind speed [m / s] of the gas measured by the anemometer 22 also increases. The quality of the surface deteriorated.

  As described above, it was found that the drying system 10 and the drying method according to the present invention are superior to the conventional one even in the examples under various conditions as shown in the table of FIG.

DESCRIPTION OF SYMBOLS 10 Drying system 11 Gas supply apparatus 12 Fan 14 Nozzle 14a Rectifying plate 16 Opening opening adjustment mechanism 18 Movement mechanism 20 Guide rail 22 Anemometer 24 Solvent concentration meter 26 Casing 28 Exhaust fan 30 Base material 32 Coating liquid 40 Controller 42 Setting means

Claims (10)

A drying system that performs drying by sending a gas to a substrate coated with a coating solution,
A gas supply device for discharging gas through the opening;
An opening degree adjustment mechanism for adjusting the opening degree of the opening of the gas supply device;
An anemometer that measures the wind speed of the gas discharged from the gas supply device;
A solvent concentration meter for measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate on which the coating solution is applied;
A control device for controlling the gas supply device and the opening degree adjustment mechanism;
With
The control device adjusts a discharge air amount of gas discharged from the gas supply device so that a solvent concentration measured by the solvent concentration meter is smaller than a predetermined limit value, and the adjusted discharge air amount is used to adjust the discharge air amount. When the gas is discharged from the gas supply device, the opening degree of the opening of the gas supply device is adjusted by the opening degree adjustment mechanism so that the wind speed of the gas measured by the anemometer becomes a predetermined target value. The drying system is adapted to control the gas supply device and the opening degree adjustment mechanism.   When the solvent concentration measured by the solvent concentration meter exceeds a predetermined limit value, the control device controls the gas supply device so as to increase the amount of gas discharged from the gas supply device. The drying system according to claim 1, wherein   The controller opens the opening so that the opening of the gas supply device is increased by the opening adjustment mechanism when the amount of gas discharged from the gas supply increases. The drying system according to claim 1 or 2, wherein the degree adjusting mechanism is controlled.   The drying system according to any one of claims 1 to 3, further comprising setting means for setting a target value of a wind speed of the gas discharged from the gas supply device. A moving mechanism for moving the gas supply device in a direction approaching and moving away from the substrate on which the coating liquid is applied;
The control device adjusts an opening degree of the opening of the gas supply device by the opening degree adjustment mechanism and adjusts the moving mechanism so that the gas wind speed measured by the anemometer becomes a predetermined target value. The drying system according to any one of claims 1 to 4, wherein the moving mechanism is further controlled to adjust a distance between the base material and the gas supply device. A drying system that performs drying by sending a gas to a substrate coated with a coating solution,
A gas supply device for discharging gas;
A moving mechanism for moving the gas supply device in a direction toward and away from the substrate on which the coating liquid is applied;
An anemometer that measures the wind speed of the gas discharged from the gas supply device;
A solvent concentration meter for measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate on which the coating solution is applied;
A control device for controlling the gas supply device and the moving mechanism;
With
The control device adjusts a discharge air amount of gas discharged from the gas supply device so that a solvent concentration measured by the solvent concentration meter is smaller than a predetermined limit value, and the adjusted discharge air amount is used to adjust the discharge air amount. The moving mechanism adjusts the distance between the base material and the gas supply device so that the gas wind speed measured by the anemometer becomes a predetermined target value when the gas is discharged from the gas supply device. A drying system adapted to control the gas supply device and the moving mechanism. A drying system that performs drying by sending a gas to a substrate coated with a coating solution,
A gas supply device for discharging gas;
A solvent concentration meter for measuring the solvent concentration of the evaporated coating solution in the atmosphere around the substrate on which the coating solution is applied;
A control device for controlling the gas supply device;
With
The control device controls the gas supply device so as to adjust a discharge air amount of gas discharged from the gas supply device so that a solvent concentration measured by the solvent concentration meter becomes smaller than a predetermined limit value. A drying system. A drying method for drying by sending a gas to a substrate coated with a coating liquid,
A step of sending gas to the base material coated with the coating liquid by the gas supply device;
Measuring the solvent concentration of the evaporated coating liquid in the atmosphere around the substrate on which the coating liquid is applied;
Adjusting the discharge air volume of the gas discharged from the gas supply device so that the solvent concentration to be measured is smaller than a predetermined limit value;
When the gas is discharged from the gas supply device with the adjusted discharge air volume, the opening degree of the opening of the gas supply device is adjusted so that the wind speed of the gas discharged from the gas supply device becomes a predetermined target value. And a process of
A drying method comprising: A drying method for drying by sending a gas to a substrate coated with a coating liquid,
A step of sending gas to the base material coated with the coating liquid by the gas supply device;
Measuring the solvent concentration of the evaporated coating liquid in the atmosphere around the substrate on which the coating liquid is applied;
Adjusting the discharge air volume of the gas discharged from the gas supply device so that the solvent concentration to be measured is smaller than a predetermined limit value;
When the gas is discharged from the gas supply device with the adjusted discharge air volume, the air speed of the gas discharged from the gas supply device is set between the gas supply device and the base material so as to become a predetermined target value. Adjusting the distance;
A drying method comprising: A drying method for drying by sending a gas to a substrate coated with a coating liquid,
A step of sending gas to the base material coated with the coating liquid by the gas supply device;
Measuring the solvent concentration of the evaporated coating liquid in the atmosphere around the substrate on which the coating liquid is applied;
Adjusting the discharge air volume of the gas discharged from the gas supply device so that the solvent concentration to be measured is smaller than a predetermined limit value;
A drying method comprising:

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