WO2007136005A1 - 被乾燥物の乾燥方法及び装置 - Google Patents
被乾燥物の乾燥方法及び装置 Download PDFInfo
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- WO2007136005A1 WO2007136005A1 PCT/JP2007/060262 JP2007060262W WO2007136005A1 WO 2007136005 A1 WO2007136005 A1 WO 2007136005A1 JP 2007060262 W JP2007060262 W JP 2007060262W WO 2007136005 A1 WO2007136005 A1 WO 2007136005A1
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- Prior art keywords
- drying
- solvent
- dried
- temperature
- vapor
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1083—Mechanical aspects of off-press plate preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N3/00—Preparing for use and conserving printing surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/005—Seals, locks, e.g. gas barriers for web drying enclosures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/006—Separating volatiles, e.g. recovering solvents from dryer exhaust gases
Definitions
- the present invention relates to a method and apparatus for drying an object to be dried, and more particularly, to a method and an apparatus for drying an object to be dried that can efficiently dry and remove the object to be dried containing a high boiling point solvent.
- Magnetic recording materials such as lithographic printing plates, various optical films, silver salt films, photographic paper, and video tape base films are made to travel in a certain direction on a belt-like body such as a support web, base film, and baryta paper.
- a coating solution such as a photosensitive layer forming solution, a heat sensitive layer forming solution, a photosensitive emulsion, or a magnetic layer forming solution is applied and dried, and then cut into predetermined dimensions as necessary.
- Patent Document 1 proposes an apparatus for continuously drying an object to be dried containing water using superheated steam.
- Patent Document 2 proposes an apparatus that uses superheated steam for food to perform drying processing.
- Patent Documents 3 and 4 also propose a device related to a steam dryer for accurately removing water droplets and other contamination by using a combustible solvent vapor such as isopropyl alcohol or an equivalent low ignition point solvent. Has been made.
- Patent Document 5 describes a method Q [. Appl. Polym. Sci., 30, 4499 (1985)] proposed by Vrentas et al. Through theoretical analysis as a method for removing the residual solvent from the coating film. It has been. Vrentas et al., As a factor that makes it difficult to remove the high-boiling solvent remaining in the polymer resin, the smaller the amount of solvent remaining in the polymer resin, the more the diffusion coefficient of the solvent in the polymer resin. The diffusion coefficient of the solvent in the polymer resin increases the size (molar molecular volume) of the solvent molecule itself, and so on. . For this reason, Vrentas et al.
- Patent Document 1 Japanese Patent Publication No. 9-502252
- Patent Document 2 JP 2002-333275 A
- Patent Document 3 Japanese Patent Publication No. 2000-516334
- Patent Document 4 Japanese Patent Laid-Open No. 2002-367950
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-158814
- the high boiling point solvent in the material to be dried is efficiently dried and removed without lowering the performance of the material to be dried, and the space and energy saving of the drying apparatus are reduced. It was a problem to realize.
- the present invention has been made in view of such circumstances, and in particular, it is possible to efficiently dry a high-boiling solvent contained in an object to be dried, and to save space and energy in a drying apparatus. It is an object of the present invention to provide a method and apparatus for drying an object to be dried. Means for solving the problem
- Claim 1 of the present invention is a method for drying an object to be dried that is carried while transporting the object to be dried containing the first solvent in order to achieve the above-mentioned object, wherein the object to be dried is dried.
- a second drying step of drying so that the product temperature of the material to be dried at the inlet of the material is low with a predetermined temperature difference from the temperature of the steam atmosphere.
- a method for drying a dried product is carried while transporting the object to be dried containing the first solvent in order to achieve the above-mentioned object, wherein the object to be dried is dried.
- the present inventors do not first dry the material to be dried to the drying point and then simply perform drying while heating.
- the temperature of the material to be dried is lower than normal (without the vapor of the second solvent) when drying the material to be dried in the vapor atmosphere of the second solvent having a boiling point lower than that of the other solvent. It was found that the first solvent can be efficiently removed by drying in a short time in a state.
- hot air drying can be suitably used as a drying method for drying the material to be dried to the drying point.
- the drying rate becomes slow in the rate-decreasing drying period after the coating film is solidified to some extent.
- this decreasing rate drying period drying in a solvent vapor atmosphere having a boiling point lower than that of the solvent contained in the material to be dried can increase the free volume in the coating film and improve the drying speed.
- the constant rate drying period before the coating film is solidified to some extent since there is no free volume in the coating film, vapor only condenses in the coating film even if it is dried in a solvent vapor atmosphere. The drying rate cannot be improved.
- the first drying step for drying the material to be dried up to the drying point, and the second solvent having a lower boiling point than the first solvent.
- a second drying step in which a steam atmosphere is formed and the product temperature of the material to be dried at the entrance of the drying chamber is lowered with a predetermined temperature difference with respect to the temperature of the steam atmosphere.
- the first solvent contained in the material to be dried can be removed by drying at a relatively low temperature and in a short time.
- the high boiling point solvent contained in the material to be dried is reduced with less heat energy. It is possible to dry efficiently with a single gear, and to realize space saving and energy saving of the drying device.
- the drying point is a point in time during which the drying process reaches a dry state in which a change in the surface intensity of the object to be dried on which the coating liquid has been applied is not observed. Specifically, it is the critical point for the transition from the constant rate drying phase to the decreasing rate drying phase, and the time when the solid content is in the range of 70 to 90%.
- Claim 2 is characterized in that, in claim 1, the temperature difference is in the range of 5 to 100 ° C.
- the temperature difference is in the range of 5 to 100 ° C, the high boiling point solvent contained in the material to be dried can be easily evaporated. Therefore, the high boiling point solvent contained in the material to be dried can be efficiently dried with less heat energy.
- the temperature difference is in the range of 20 to 60 ° C.
- Claim 3 is that according to claim 1 or 2, wherein the vapor amount of the second solvent is C [gZm 3 ], and the product temperature of the material to be dried is T [° C], T [° C].
- the saturated vapor pressure of the second solvent is P [Pa],
- Claim 4 is the temperature detection step of detecting the temperature of the vapor atmosphere of the second solvent and the product temperature of the material to be dried in any one of claims 1 to 3, and the temperature detection step. Based on the obtained detection result, the product temperature of the object to be dried and soot or so that the product temperature of the object to be dried is lowered with a predetermined temperature difference from the temperature of the steam atmosphere. And a temperature control step for controlling the temperature of the vapor atmosphere of the second solvent.
- the product temperature of the object to be dried is stably maintained so as to be lower than the temperature of the vapor atmosphere of the second solvent with a predetermined temperature difference. it can. Therefore, the high boiling point solvent contained in the material to be dried can be efficiently dried with less heat energy. In addition, it is possible to realize space saving and energy saving of the drying apparatus.
- Claim 5 is a vapor amount detection step for detecting a vapor amount of the second solvent in a drying chamber forming a vapor atmosphere of the second solvent, according to any one of claims 1 to 4. Based on the detection result obtained in the vapor amount detection step, the second solvent supplied into the drying chamber so that the vapor amount of the second solvent in the drying chamber falls within a predetermined range. And a vapor amount control step for controlling the vapor amount of the solvent.
- the vapor amount of the second solvent in the drying chamber can be stably maintained so as to be within a predetermined range, the high boiling point solvent contained in the material to be dried is efficiently dried. be able to.
- the predetermined range includes the range of claim 3.
- Claim 6 is characterized in that the method for drying an object to be dried according to any one of claims 1 to 5 is applied to a method for producing a lithographic printing plate precursor.
- the present invention can be applied to other drying processes in addition to the drying process of the image forming layer.
- Claim 7 of the present invention provides a drying apparatus for drying an object to be dried while transporting the object to be dried containing the first solvent in order to achieve the above-mentioned object.
- a vapor atmosphere of a second solvent having a boiling point lower than that of the first solvent is formed in a first drying section that dries up to a point, and a drying chamber that is provided downstream of the first drying section.
- a second drying section that dries the product to be dried at the entrance of the drying chamber so that the product temperature is lower than the temperature of the steam atmosphere with a predetermined temperature difference.
- the present invention provides a drying apparatus for an object to be dried.
- Claim 7 constitutes the present invention as an apparatus.
- the drying point is a point in time when the drying process reaches a dry state where no change in surface gloss of the object to be dried is applied. Specifically, it is the critical point for the transition from the constant rate drying period to the decreasing rate drying period, which is the time when the solid content is in the range of 70 to 90%.
- Claim 8 is the method of claim 7, wherein the second drying unit has a boiling point higher than that of the first solvent.
- Solvent vapor generating means for generating a low second solvent vapor to form a vapor atmosphere of the second solvent in the drying chamber, and heating means for heating an object to be dried in the drying chamber
- a temperature detection means for detecting the temperature of the vapor atmosphere of the second solvent at the inlet of the drying chamber and the product temperature of the material to be dried, and the drying based on the detection result of the temperature detection means.
- a control means for controlling the heating means so that the product temperature of the material to be dried at the chamber inlet is lowered with a predetermined temperature difference from the temperature of the steam atmosphere.
- the high-boiling solvent contained in the material to be dried can be efficiently dried with a small amount of heat energy, and the drying apparatus can be made space-saving and energy-saving. realizable.
- the heating means include heating air, radiant heat transfer (for example, halogen heater, infrared heater, microwave, etc.), induction heat transfer, or a combination thereof.
- a ninth aspect of the present invention is the method according to the eighth aspect, wherein a cooling means for cooling the material to be dried is provided in a front stage of the drying chamber, and based on a detection result of the temperature detecting means, the object to be dried at the drying chamber inlet is provided.
- the control means controls the cooling means so that the product temperature of the dried product is lowered with a predetermined temperature difference with respect to the temperature of the steam atmosphere.
- Examples of such cooling means include a cooling method using cold air and a method of exchanging heat with a refrigerant.
- a tenth aspect according to the eighth or ninth aspect is based on the vapor amount detection means for detecting the vapor amount of the second solvent in the drying chamber and the detection result of the vapor amount detection means.
- a vapor amount control means for controlling the vapor amount of the second solvent supplied into the drying chamber so that the vapor amount of the second solvent in the drying chamber falls within a predetermined range. It is characterized by.
- the vapor amount of the second solvent in the drying chamber can be controlled to be within a predetermined range, the high boiling point solvent contained in the material to be dried can be efficiently converted with less heat energy. Can be dried.
- the second solvent does not condense on the material to be dried! The range is included.
- An eleventh aspect is characterized in that in any one of the eighth to tenth aspects, an air curtain forming means for forming an air curtain at the inlet and the outlet of the drying chamber is provided.
- the vapor of the second solvent can be prevented from leaking to the outside of the drying chamber, and air can be prevented from entering from the outside of the drying chamber. And various conditions such as steam volume can be stably maintained. Therefore, the high boiling point solvent contained in the material to be dried can be efficiently dried. It is preferable to form an air curtain by flowing clean air in a direction (width direction) perpendicular to the conveyance direction of the object to be dried.
- the second solvent used in the drying chamber can be reused, and the high boiling point solvent contained in the material to be dried can be efficiently dried with less heat energy.
- the separation means for example, a means for separating the solvent obtained by condensing the recovered vapor with a distillation tower or the like can be used.
- Claim 13 is any one of claims 7 to 12, wherein a third drying section for drying the object to be dried with hot air is provided after the second drying section. And
- a fourteenth aspect is characterized in that the lithographic printing plate precursor manufacturing apparatus includes the drying apparatus for drying objects according to any one of the seventh to thirteenth aspects.
- FIG. 1 is a diagram illustrating an example of the configuration of a planographic printing plate precursor manufacturing apparatus in the present embodiment.
- FIG. 2 is a diagram illustrating an example of the configuration of the drying apparatus according to the present invention in FIG.
- FIG. 3 is a diagram illustrating various control mechanisms related to the chamber of FIG.
- FIG. 4 is a diagram for explaining another aspect of FIG.
- FIG. 5 is a diagram for explaining another aspect of the drying apparatus of FIG. 1.
- FIG. 6 is a table showing the results of this example.
- FIG. 7 is a table showing the results of this example.
- FIG. 8 is a graph showing the results of this example.
- a lithographic printing plate precursor manufacturing apparatus will be described with an example of a drying apparatus for evaporating and drying a hardly volatile solvent contained in an image forming layer coating film.
- the present invention is not limited to this technical field, and can be applied to a drying method and apparatus for drying objects in various technical fields.
- FIG. 1 is a diagram showing a basic configuration of a planographic printing plate manufacturing apparatus 10 in the present embodiment.
- an arrow A indicates the conveyance direction of the support (hereinafter referred to as web 12).
- the lithographic printing plate precursor manufacturing apparatus 10 in FIG. 1 mainly includes a feeding device 14 for feeding out the web 12, a surface treatment device 16 for treating the coating surface of the web 12, and an image-forming layer coating solution.
- a winding device 26 for winding the web 12.
- the lithographic printing plate precursor manufacturing apparatus 10 shown in FIG. 1 is an example.For example, a coating apparatus for applying an undercoat coating solution before applying an image forming layer coating solution may be provided, or an overcoat layer coating may be provided. After the drying device 24, a humidity control device for adjusting the moisture of the overcoat layer may be provided.
- the web 12 from which the feeding force 14 has also been fed is guided by the guide rollers 27, etc., and conveyed to each step.
- the surface treatment device 16 for example, in order to improve the adhesion between the web 12 and the image forming layer and to provide water retention to the non-image portion, the surface of the web 12 is roughened. Roughening treatment (graining treatment, etc.), anodizing treatment for forming an acid coating on the surface to improve the wear resistance, chemical resistance and water retention of the web 12, and anodizing coating Necessary pretreatments are performed on the web 12, such as silicate treatment for improving the film strength, hydrophilicity, and adhesion to the image forming layer.
- the first coating device 18 is a device that coats the surface of the web 12 with the image forming layer coating solution.
- Examples of the coating method include slide bead coating method, curtain coating method, bar coating method, spin coating method, spray coating method, dip coating method, air knife coating method, blade coating method, roll coating method, etc. Although not particularly limited, among them, a slide bead coating method, a curtain coating method, a bar coating method and the like are preferably used. In FIG. 1, it is shown as bar coating.
- the drying device 20 is a device for drying the image forming layer formed on the web 12.
- the applied coating film for the image forming layer contains a hardly volatile high boiling point solvent as the first solvent, and this first solvent (hereinafter referred to as the high boiling point solvent) is effective. It is important for the quality of the lithographic printing plate precursor to evaporate to dry.
- the detailed configuration of the drying device 20 will be described later because it is a characteristic part of the present invention.
- the second coating device 22 is a device that forms a water-soluble overcoat layer on the image forming layer in order to block oxygen from the image forming layer and prevent contamination of the surface of the image forming layer with a lipophilic substance. .
- the water-soluble overcoat layer can be easily removed at the time of printing, and contains a resin having a selected water-soluble organic polymer compound power.
- As a method for applying the water-soluble overcoat layer the same method as that for the first coating device 18 described above can be used.
- the web 14 to which the water-soluble overcoat layer is applied is further dried by a subsequent drying device 24 and finally wound by a winding device 26.
- FIG. 2 is a diagram for explaining an example of the configuration of the drying apparatus 20 according to the present invention.
- the drying device 20 includes a drying box 36 formed along the conveyance direction of the web 12, and slit openings are formed at both ends of the drying box 20 to enter and exit the planographic printing plate. .
- a box-shaped chamber 38 is disposed on the downstream side, and slit-shaped openings through which the planographic printing plate enters and exits are formed at both ends of the chamber 38.
- conveying rollers 37 for conveying the web 12 on which the image forming layer coating solution is coated.
- the inside of the drying box 36 mainly includes the vapor atmosphere drying unit 30 that forms the vapor atmosphere of the second solvent in the chamber 38 and dries, and the web 12 outside the chamber 38. It consists of hot air drying units 32 and 34 that apply hot air to dry with hot air.
- the conveyance direction of the web 12 is indicated by an arrow A.
- a plurality of nozzles 40... For blowing hot air to the web 12 are arranged in the hot air drying sections 32 and 34 outside the chamber 38. As a result, the drying hot air drying sections 32 and 34 are connected to the web 12. The hot air is blown on the top so that it can be dried.
- the number of nozzles 40 and the installation location are not limited to the example shown in FIG.
- a plurality of nozzles 42 are arranged above the conveying roller to eject heated air containing a low-boiling solvent in the web 12 (solvent) Steam generating means).
- a vapor atmosphere of a second solvent hereinafter referred to as a low-boiling solvent
- the boiling solvent can be removed by drying.
- the low boiling point solvent used is more preferably one having a boiling point of 30 ° C. or lower than the high boiling point solvent contained in the coating film for the image forming layer.
- the high-boiling solvent those having a boiling point of 150 ° C. or higher are preferred. Specific examples of such high-boiling solvents and low-boiling solvents will be described later.
- the temperature of the vapor atmosphere of the low-boiling solvent in the chamber 38 is preferably set to be 10 ° C or more higher than the boiling point of the low-boiling solvent used. Further, it is preferable that the vapor amount of the low boiling point solvent in the chamber 38 is set to an amount that does not cause condensation on the web 12.
- the low boiling point solvent is an organic solvent
- the entire drying apparatus 20 has a nitrogen atmosphere.
- the free volume in the image forming layer coating film is increased by the vapor atmosphere of the low boiling point solvent 56, and the diffusion rate of the high boiling point solvent remaining in the image forming layer coating film is increased.
- the high boiling point solvent can be efficiently removed by drying due to a synergistic effect with the increase in total enthalpy due to the inclusion of high-temperature solvent vapor.
- the drying box 36 is provided with air force tent forming means 44, 44 outside the openings formed at both ends of the chamber 38, respectively.
- the air curtain forming means 44, 44 is configured to allow clean air from which dust and foreign matter have been removed by a filter (not shown) to flow in the width direction of the web 12.
- FIG. 3 is a diagram for explaining various control mechanisms related to the chamber 38.
- the air blown from the blower 46 for supplying the hot air from the nozzle 42 is heated by the first heat exchange 48, and the chamber is fed from the nozzle 42 to the chamber. It spouts toward the web 12 in 38.
- the second heat exchanger 52 and the solvent tank 54 are connected to the pipe 50 via the pipe 58 between the first heat exchanger 48 and the nozzle 42.
- a low boiling point solvent 56 is stored in the solvent tank 54, and a third heat exchange 53 is further provided.
- the low boiling point solvent 56 is heated by the third heat exchange in the solvent tank 54, then further heated by the second heat exchange to become steam, mixed with the air passing through the pipe 50, Ejected from nozzle 42.
- the flow rate of the low-boiling solvent 56 supplied to the second heat exchanger is controlled by a flow valve, a pump, or the like, not shown, provided in the middle of the pipe 58.
- a pipe 60 is connected to the chamber 38.
- the pipe 60 is connected to the distillation column 62, where the low boiling point solvent 56 and the high boiling point solvent are separated, and the low boiling point solvent 56 is returned to the solvent tank 54 via the pipe 64.
- the high boiling point solvent is recovered in the recovery tank 66.
- a suction blower or the like may be provided in the middle of the pipe 60.
- Temperature detection means 68 for detecting the vapor atmosphere of the low-boiling solvent at the inlet in the chamber 38 and the temperature of the web 12 are provided.
- the control means 70 is a first heating means that is based on the detection result of the temperature detection means 68 so that the temperature of the web 12 becomes lower than the temperature of the vapor atmosphere of the low boiling point solvent with a predetermined temperature difference.
- Controls heat exchanger 48 (dotted arrow in Fig. 3).
- thermometers As the temperature detection means 68, various thermometers, non-contact temperature sensors, and the like can be used.
- heating means convection generated only by the heated air by the first heat exchanger 48 is generated. It is possible to use non-heating means, that is, radiant heat transfer (for example, halogen heater, infrared heater, microphone mouth wave, etc.), induction heat transfer (for example, self-heating the web 12 by a high frequency coil).
- radiant heat transfer for example, halogen heater, infrared heater, microphone mouth wave, etc.
- induction heat transfer for example, self-heating the web 12 by a high frequency coil.
- the position where the steam atmosphere drying unit 30 is provided is effectively a position where the surface of the object to be dried after the drying point of the object to be dried is in a dry state.
- the drying point is a position in the drying device 20 that reaches a dry state in which no change in gloss of the surface of the coating film on the image forming layer on the web 12 is observed in the drying device 20.
- the change in gloss can be determined, for example, by rubbing the surface of the image forming layer coating film with a stick having a cloth wrapped around the tip and whether the coating liquid adheres to the cloth wrapped around the stick.
- the drying point will be specifically described.
- the film surface temperature which is the wet bulb temperature
- the period before the film surface temperature rises is called the constant rate drying period.
- the wet bulb temperature the movement of the volatile components in the film is sufficiently fast and there is a sufficient amount of liquid that volatilizes from the surface.
- the decreasing rate drying period After the film surface temperature has risen, the decreasing rate drying period is called the decreasing rate drying period. In this decreasing rate drying period, even if the volatile matter in the coating film is insufficient on the surface and the same wind is applied, the drying rate becomes slow. .
- the critical point between the constant rate drying period and the decreasing rate drying period is called the drying change point (drying point), which is the point at which the solid content becomes 70 to 90%.
- Solid content (%) Solid content Z (Volatile content + Solid content) X 100
- the solid content and (volatile content + solid content) can be determined by weight measurement.
- the web 12 coated with the image forming layer coating solution is conveyed into the drying box 36 of the drying apparatus 20 through the slit-shaped opening, and is conveyed by the guide rollers 37 while supporting the lower surface.
- the hot air drying section 32 (first drying section) of the drying box 36
- the hot air is sprayed from the plurality of nozzles 40... Toward the image forming layer coating film on the S web 12.
- the image forming layer coating film on the web 12 is heated to the drying point.
- the heated air force containing the vapor of the low boiling point solvent 56 from the plurality of nozzles 42 ⁇ Image formation on the web 12 It ejects toward the layer coating film.
- the web 12 is heated and the chamber 38 is filled with the vapor of the low boiling point solvent 56.
- the temperature detecting means 68 detects the temperature of the vapor atmosphere of the low boiling point solvent 56 and the temperature of the web 12 at the inlet of the chamber 38.
- control means 70 based on the detection result, the first heat exchanger such that the temperature of the web 12 is 5 to 100 ° C lower than the temperature of the vapor atmosphere of the low boiling point solvent 56.
- Control 48 As a result, the temperature of the vapor atmosphere of the low boiling point solvent 56 supplied into the chamber 38 is adjusted.
- the vapor amount of the low-boiling point solvent 56 in the chamber 38 is preliminarily set within a range where no condensation occurs, so that the vapor condensation on the web 12 can be suppressed.
- the free volume in the image forming layer coating film is increased by the vapor atmosphere of the low boiling point solvent 56, and the diffusion rate of the high boiling point solvent remaining in the image forming layer coating film is increased. rises. At this time, since the high boiling point solvent contains high-temperature solvent vapor, the total enthalpy is also increased, and it is considered that the high boiling point solvent can be dried and removed with high efficiency by these synergistic effects.
- the vapor atmosphere exhausted from the chamber 38 passes through the pipe 60 and reaches the distillation column 62. Then, after being separated into a high boiling point solvent and a low boiling point solvent, the low boiling point solvent is returned to the solvent tank 54 via the circulation pipe 64 and reused.
- the web 12 dried in the chamber 38 is conveyed to the hot air drying unit 34 (third drying unit), and the hot air is again applied from the plurality of nozzles 40 to apply the image forming layer on the web 12. Sprayed toward the membrane. Thereby, the image forming layer coating film on the web 12 is further dried. At this time, since the residual solvent in the coating film for the image forming layer is replaced with the low boiling point solvent, it is easily dried by hot air drying.
- the drying method and apparatus for a material to be dried according to the present invention to the drying method and apparatus for an image forming layer coating film in the production of a lithographic printing plate precursor, the image forming layer coating is particularly applied.
- the high boiling point solvent contained in the membrane can be efficiently removed by drying. High boiling point Since the heat energy for evaporating and drying the medium is reduced, it is possible to save space and energy in the drying device. Furthermore, since the drying time can be shortened, damage to the material can also be suppressed.
- FIG. 4 is a diagram for explaining another aspect of various control mechanisms related to the chamber 38.
- the same parts as those in FIG. 3 or those having the same functions are denoted by the same reference numerals, and detailed description thereof is omitted.
- a vapor amount detecting means 72 for detecting the vapor amount of the low boiling point solvent is provided in the chamber 38.
- the steam quantity control means 74 can control the valve 76 based on the detection result of the steam quantity detection means 72.
- the nozzle 76 can adjust the amount of vapor of the low boiling point solvent 56 to be mixed with the heated air that is ejected from the nozzle 42 force.
- Other configurations are the same as those in FIG.
- the amount of the low boiling point solvent in the chamber 38 can be stably maintained within the set value range while continuously or intermittently monitoring.
- the vapor amount detection means 72 various concentration meters and the like can be used, but other means may be used as long as they can measure or detect the vapor amount.
- the second heat exchange 52 may be controlled to control the amount of steam generated.
- any other means can be used as long as it can adjust the vapor amount of the low-boiling point solvent supplied into the chamber 38 !.
- the vapor amount of the low boiling point solvent in the chamber 38 is C [gZm 3 ]
- the temperature of the web 12 is T [in]
- the saturated vapor pressure of the low boiling point solvent in T [° C] is P [Pa ]
- the molecular weight of the low boiling solvent is M
- the amount of steam is such that 0.25 ⁇ CR (273. 15 + T) / (P ⁇ ⁇ ) ⁇ 1.0. Is preferably set.
- the drying method and apparatus for an object to be dried according to the present invention to the drying method and apparatus for an image forming layer coating film in the production of a lithographic printing plate precursor, the image forming layer coating is particularly applied.
- the high boiling point solvent contained in the membrane can be efficiently removed by drying at a relatively low temperature and in a short time. It also reduces the heat energy for evaporating and drying high boiling solvents Therefore, space saving and energy saving of the drying device can be realized. Furthermore, since the drying time can be shortened, damage to the material can also be suppressed.
- the temperature difference between the vapor atmosphere of the low-boiling solvent in the chamber 38 and the web 12 has been described with respect to an example in which the temperature is set mainly by adjusting the temperature of the vapor atmosphere of the low-boiling solvent. It is not limited to this.
- FIG. 5 is a diagram for explaining another aspect of the drying apparatus.
- the cooling means 78 is provided in the front stage of the chamber 38 and the web 12 is cooled, so that the temperature of the web 12 has a predetermined temperature difference from the vapor atmosphere of the low boiling point solvent 56. Then set it to be low.
- Examples of such cooling means 78 include power that can be used by publicly known cooling means, specifically, a method of cooling with cold air, a method of heat exchange with a refrigerant such as cooling water, and the like.
- the force shown in the example of controlling the temperature difference between the web 12 and the vapor atmosphere of the low boiling point solvent using the control means 70 is not limited to this.
- a method of controlling the temperature difference between the web 12 and the vapor atmosphere of the low-boiling solvent by adjusting the hot air drying temperature and drying time can be adopted.
- the present invention can be applied to other drying steps in the production process of a lithographic printing plate precursor.
- the present invention is not limited to the field of production of a lithographic printing plate precursor, and various technical fields such as the coating field
- the present invention can also be applied.
- the object to be dried is not limited to a belt-like support that runs continuously, but also includes metals other than the belt-like material, grease, paper, cloth, and the like.
- the aluminum plate used in the lithographic printing plate precursor according to this embodiment is a metal mainly composed of dimensionally stable aluminum, and is made of aluminum or an aluminum alloy. Become.
- a pure aluminum plate, an alloy plate containing aluminum as a main component and containing a trace amount of foreign elements, or a plastic film or paper laminated or vapor-deposited with aluminum or an aluminum alloy can also be used.
- a composite sheet in which an aluminum sheet is bonded on a polyethylene terephthalate film can also be used.
- the composition of the aluminum plate used in the present embodiment is not particularly limited, but it is preferable to use a pure aluminum plate. Since completely pure aluminum is difficult to manufacture due to scouring technology, it may be used that contains slightly different elements. For example, known materials described in Aluminum Handbook 4th edition (Light Metals Association (1990)), specifically, for example, A1050, JIS A1100, JIS A3003, JIS A3004, JIS A3005, international registration An aluminum alloy plate such as alloy 3103A can be used as appropriate.
- an Al Miniumu content force from 99.4 to 95 weight 0/0, Fe, Si, Cu, Mg, Mn, Zn, Cr and T group consisting force aluminum alloy containing 3 or more selected, scrap aluminum material also Can also use an aluminum plate using a secondary metal.
- the aluminum content of the aluminum alloy plate is not particularly limited, aluminum -. ⁇ beam content 95-99 4 mass 0/0 is a by Yogu further Again aluminum plate force Fe, Si, It is preferable to contain three or more different elements selected from the group consisting of Cu, Mg, Mn, Zn, Cr and 1 in the following range. This is because the crystal grains of aluminum become finer.
- the aluminum plate may contain elements such as Bi and Ni and inevitable impurities.
- the manufacturing method of the aluminum plate may be a difference between the continuous forging method and the DC forging method, and an aluminum plate in which DC annealing method intermediate annealing or soaking treatment is omitted can also be used.
- the aluminum plate used in the present embodiment is a continuous strip-shaped sheet material or plate material that is cut into a size corresponding to a planographic printing plate precursor that is shipped as an aluminum web product. A leaf-like sheet may be used.
- the thickness of the aluminum plate used in the present embodiment is usually about 0.05 mm to about L mm, and preferably 0.1 mm to 0.5 mm. This thickness can be appropriately changed according to the size of the printing press, the size of the printing plate, and the user's desire.
- the above aluminum plate is subjected to at least a surface treatment including a roughening treatment, an anodizing treatment, and a specific sealing treatment, so that the lithographic plate is used.
- this surface treatment may further include various treatments.
- the alloy component of the aluminum plate used in the treatment solution used in the step is eluted, so the treatment solution may contain the alloy component of the aluminum plate.
- the surface treatment it is preferable to perform an alkali etching treatment or a desmut treatment before the electrolytic surface roughening treatment, and it is also preferable to perform the alkali etching treatment and the desmut treatment in this order. Moreover, it is preferable to perform an alkali etching treatment or a desmut treatment after the electrolytic surface roughening treatment, and it is also preferable to perform an alkali etching treatment and a desmut treatment in this order. Further, the alkali etching treatment after the electrolytic surface roughening treatment can be omitted. It is also preferable to perform a mechanical surface roughening treatment before these treatments. Further, the electrolytic surface roughening treatment may be performed twice or more. Thereafter, it is also preferable to perform anodizing treatment, sealing treatment, hydrophilization treatment and the like.
- low boiling point solvents those having a boiling point of 30 ° C. or higher and 130 ° C. or lower are preferable.
- Such low boiling point solvents include the following: The present invention is not limited to these. The boiling point is described in parentheses.
- Ethers such as 27 ° C), acetone (56.2 ° C), methyl ethyl ketone (79. 59 ° C), methyl n-propyl ketone (103.3 ° C), methyl isobutyl ketone ( 115. 9 ° C), ketones such as ethyl ketone (102.2 ° C), methyl acetate (57.8 ° C), ethyl acetate (77.1 ° C), Carbonized esters such as acetic acid-n-propyl (101.6 ° C), n-butyl acetate (1265 ° C), n-hexane (68742 ° C), cyclohexane (88.738 ° C), etc. Hydrogen, water, etc.
- the high boiling point solvent used in this embodiment preferably has a boiling point of 150 ° C. or higher.
- Examples of such high-boiling solvents include the following: The present invention is not limited to these. The boiling point is described in parentheses.
- the solvent used in the coating solution is not particularly limited, and examples thereof include water and various solvents.
- the image forming layer of the lithographic printing plate precursor according to this embodiment contains a novolac resin and an infrared absorbing dye as water-insoluble and alkali-soluble resins, and increases the solubility in an alkaline aqueous solution upon exposure. It is.
- a layer containing a novolak-type phenol resin (novolak resin) containing phenol or substituted phenols as a structural unit can be used.
- Novolac resin produces strong hydrogen bonding in the unexposed areas, and when some hydrogen bonds are easily released in the exposed areas! / It is fat.
- This novolac coconut resin is not particularly limited as long as it contains phenols as a structural unit in the molecule.
- the novolac resin in the present embodiment is a resin obtained by a condensation reaction of phenol, a substituted phenol shown below and an aldehyde.
- the phenol include phenol, Isopropylphenol, t-Butylphenol, tamylyl noreno, hexinoleenore, cyclohexenolenoenole, 3-methinore 4—black mouth t— Examples include butinolevenole, isopropinorecrezonole, t-butinorecrezonore, and t-aminorecoleol. T-Butylphenol and t-butyltaresole are preferable.
- aldehydes examples include aliphatic and aromatic aldehydes such as formaldehyde, acetoaldehyde, acrolein, and ketonic tonaldehyde. Preferably, it is formaldehyde or acetoaldehyde.
- the weight average molecular weight of the novolak rosin is 500 to 50000, preferably S, more preferably 700 to 20000, and even more preferably 1000 to 10,000.
- the degree of dispersion is preferably 1. ⁇ to ⁇ .
- the ratio of the novolak rosin to the total solid content in the image forming layer is preferably 5% by mass to 95% by mass, more preferably 15% by mass to 90% by mass.
- novolak rosins particularly preferred are novolaks such as phenol formaldehyde aldehyde, phenol Z talesol (any of m-, ⁇ -, or m-Zp-mixed) mixed formaldehyde rosin. Examples include rosin.
- Novolak sardine may be used alone or in combination of two or more.
- alkali-soluble resin other than novolac resin can be used in combination with the image forming layer.
- the alkali-soluble resin usable in the image forming layer is not particularly limited as long as it has a property of dissolving when contacted with an alkaline image solution, but it is acidic to the main chain and Z or side chain in the polymer. It is preferably a homopolymer containing a group, a copolymer thereof, or a mixture thereof.
- alkali-soluble resin having an acidic group examples include (1) a resin having a phenolic hydroxyl group other than the novolak resin, (2) a sulfonamide group, or (3) an active group.
- examples thereof include a polymer compound having any functional group of a mid group in the molecule.
- the power illustrated below The present invention is not limited to these.
- polymer compound having a phenolic hydroxyl group other than the novolac resin pyrogallol acetone resin or a polymer compound having a phenolic hydroxyl group in the side chain can be used.
- the polymer compound having a phenolic hydroxyl group in the side chain is a polymerizable compound comprising a low molecular compound having at least one phenolic hydroxyl group and a polymerizable unsaturated bond.
- examples thereof include a polymer compound obtained by homopolymerizing a monomer or copolymerizing the monomer with another polymerizable monomer.
- Examples of the polymerizable monomer having a phenolic hydroxyl group include acrylamide, methacrylamide, acrylic acid ester, methacrylic acid ester, or hydroxystyrene having a phenolic hydroxyl group.
- a copolymer of phenol and formaldehyde having an alkyl group having 3 to 8 carbon atoms as a substituent such as t-butylphenol formaldehyde resin and octylphenolformaldehyde resin, may be used in combination.
- the alkali-soluble resin having a sulfonamide group is a polymer obtained by homopolymerizing a polymerizable monomer having a sulfonamide group or copolymerizing the monomer with another polymerizable monomer.
- the polymerizable monomer having a sulfonamide group includes a sulfonamide group in which at least one hydrogen atom is bonded on a nitrogen atom —NH—SO— and one polymerizable unsaturated bond in each molecule.
- Examples thereof include a polymerizable monomer composed of a compound.
- a polymerizable monomer composed of a compound examples thereof include a polymerizable monomer composed of a compound.
- low molecular weight compounds having an allyloyl group, an aryl group, or a bisoxy group, and a substituted or monosubstituted aminosulfol group or a substituted sulfobilimino group are preferred.
- the alkali-soluble resin having an active imide group has an active imide group in the molecule.
- a polymerizable monomer having a low molecular weight that has one or more active imide groups and one or more polymerizable unsaturated bonds in one molecule is homopolymerized or the monomer. And polymer compounds obtained by copolymerizing other polymerizable monomers.
- N- (p-toluenesulfurol) methacrylamide, N- (p-toluenesulfurol) acrylamide and the like can be preferably used.
- the alkali-soluble resin is a polymer obtained by polymerizing two or more of the polymerizable monomer having a phenolic hydroxyl group, the polymerizable monomer having a sulfonamide group, and the polymerizable monomer having an active imide group.
- the copolymerization ratio of the polymerizable monomer and the combination of the polymerizable monomers are not particularly limited, but in particular, the polymerizable monomer having a phenolic hydroxyl group has a polymerizable monomer having a sulfonamide group and Z or an active imide group.
- the compounding polymerization ratio of these components is preferably in the range of 50:50 to 5:95, more preferably in the range of 40:60 to 10:90.
- the alkali-soluble resin the polymerizable monomer having a phenolic hydroxyl group, the polymerizable monomer having a sulfonamide group, or the polymerizable monomer marker having an active imide group is also selected.
- it is preferably a polymer compound obtained by copolymerizing other polymerizable monomers.
- the copolymerization ratio preferably contains 10 mol% or more of a monomer that imparts alkali solubility, and more preferably contains 20 mol% or more. If the copolymerization component of the monomer imparting alkali solubility is less than 10 mol%, the alkali solubility becomes insufficient and the development latitude tends to decrease immediately.
- Examples of other polymerizable monomers that can be used here include the following compounds (ml) to (ml 2). The present invention is not limited to these.
- (m4) Acrylamide, methacrylamide, N-methylol acrylamide, N ethyl acrylamide, N hexyl methacrylamide, N cyclohexyl acrylamide, N-hydroxyxetyl acrylamide, N phenol acrylamide, N-trophe Acrylamide young methacrylamides such as ruacryl amide, Nethyl N-phenylacrylamide.
- Vinyl ethers such as ethyl vinyl ether, 2-chloroethyl vinyl ether, hydroxyethyl vinylenoleatenore, propinorevininoleatenore, butinorevininoreethenore, otachinolebinino ether, and vinyl vinyl ether .
- Styrenes such as styrene, methyl styrene, chloromethylol styrene.
- Vinylenoketones such as methyl vinyl ketone, ethyl vinyl ketone, propyl butyl ketone, and phenyl vinyl ketone.
- Olefins such as ethylene, propylene, isobutylene, butadiene and isoprene
- Unsaturated imides such as (mil) maleimide, N-attalyloylacrylamide, N-acetalmethacrylamide, N-propiolmethacrylamide, N- (p-chlorobenzoyl) methacrylamide and the like.
- (ml 2) Unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, and itaconic acid.
- the alkali-soluble resin that can be used in combination with the image-forming layer is a single weight of the polymerizable monomer having a phenolic hydroxyl group, the polymerizable monomer having a sulfonamide group, or the polymerizable monomer having an active imide group.
- the weight average molecular weight is 2, 0 Those having a number average molecular weight of 500 or more are preferred. It is more preferable that the weight average molecular weight is 5,000 to 300,000, the number average molecular weight is 800 to 250,000, and the dispersity (weight average molecular weight Z number average molecular weight) is 1.1 to 10.
- the alkali-soluble resin used in the image forming layer is optionally used in the range of 5% to 900% by mass, that is, 9 times the amount of the nopolac resin with respect to the novolak resin. be able to.
- the content of the alkali-soluble resin in the total solid content of the image forming layer is preferably used in an amount of 50% by mass to 98% by mass from the viewpoint of image formation sensitivity and durability.
- the amount added is a total amount of alkali-soluble and novolac resins.
- An infrared absorbing dye is added to the image forming layer.
- an infrared absorbing dye By adding an infrared absorbing dye, the image forming layer becomes infrared laser sensitive.
- the infrared absorber used here is not particularly limited as long as it has a maximum absorption wavelength of 750 nm to 1,400 nm and absorbs light of this wavelength to cause ripening. Various known dyes can be used.
- infrared absorber used in the present embodiment, commercially available dyes and publicly known ones described in literature (for example, edited by the Society for Synthetic Organic Chemistry, published in 1970) can be used. Specific examples include dyes such as azo dyes, metal complex azo dyes, pyrazolone azo dyes, anthraquinone dyes, phthalocyanine dyes, carbon dyes, quinone imine dyes, methine dyes, and cyanine dyes. Of the above dyes, those that absorb infrared light or near infrared light are particularly preferred because they are suitable for use in lasers that emit infrared light or near infrared light.
- Examples of dyes that absorb infrared light or near infrared light include, for example, JP-A-58-125246, JP-A-59-84356, JP-A-59-829, Cyanine dyes described in JP-A-60-78787, methine dyes described in JP-A-58-173696, JP-A-58-181690, JP-A-58-194595, etc., JP-A-58- Naphthoquinone dyes described in 112793, JP-A-58-224793, JP-A-59-48187, JP-A-59-73996, JP-A-60-52940, JP-A-60-63744, etc. , JP-A-58 — Mention may be made of squalium dyes described in No. 112792, and cyanine dyes described in British Patent No. 434,875.
- Another example of a particularly preferable dye is a near-infrared absorbing dye described as formulas (1) and (v) in US Pat. No. 4,756,993.
- these dyes cyanine dyes, squalium dyes, pyrylium salts, nickel thiolate complexes, and endocyanin dyes are particularly preferable.
- one particularly preferred example of the preferred cyanine dye or indolenocyanine dye is a cyanine dye represented by the following general formula (i).
- X 1 is a hydrogen atom, a halogen atom—NPh, X 2 —L 1 or a group shown below
- X 2 represents an oxygen atom, a nitrogen atom, or a sulfur atom
- L 1 represents the number of carbon atoms 1 to 12 hydrocarbon group, an aromatic ring having a hetero atom, and a hydrocarbon group having 1 to 12 carbon atoms including a hetero atom.
- the hetero atom means N, S, 0, a halogen atom or Se.
- Xa_ is defined in the same manner as Z 1 — described later, and Ra represents a substituent selected from a hydrogen atom, an alkyl group, an aryl group, a substituted or unsubstituted amino group, and a halogen atom.
- R 1 and R 2 each independently represents a hydrocarbon group having 1 to 12 carbon atoms. From the storage stability of the image forming coating solution, R 1 and R 2 are preferably hydrocarbon groups having 2 or more carbon atoms. R 1 and R 2 are bonded to each other, and a 5-membered ring or It is more preferable to form a 6-membered ring.
- Ar 2 represents an aromatic hydrocarbon group which may have the same or different substituents.
- aromatic hydrocarbon group preferred substituents of the benzene ring and naphthalene ring are a hydrocarbon group having 12 or less carbon atoms, a halogen atom, and an alkoxy group having 12 or less carbon atoms.
- Y 2 represents a sulfur atom or a dialkylmethylene group having 12 or less carbon atoms, which may be the same or different.
- R 3 and R 4 each represent a hydrocarbon group having 20 or less carbon atoms which may have the same or different substituents.
- an alkoxy group having 12 or less carbon atoms, a carboxyl group, and a sulfo group are preferable.
- R 6 , R 7, and R 8 may be the same or different and each represents a hydrogen atom or a hydrocarbon group having 12 or less carbon atoms.
- Za_ indicates anti-on.
- the cyanine dye strength represented by the general formula (i) does not require Za_ if it has a ionic substituent in its structure and charge neutralization is not necessary.
- Za_ is the image forming layer coating
- halogen ions perchlorate ions, tetrafluoroborethione ions, hexafluorophosphate ions, and sulfonate ions are preferable. More preferred are fluorophosphate ions and aryl sulfonate ions.
- the infrared absorbing dye may be used alone or in combination of two or more. These infrared absorbing dyes may be added together with other components in the image forming layer, or another layer may be provided and added thereto. In the case of a separate layer, it is preferably added to a layer adjacent to the image forming layer.
- Infrared absorbing dyes such as cyanine dyes mentioned as preferred dyes interact with the novolak resin and function as a dissolution inhibitor of alkali-soluble resin. It should be noted that when an infrared absorbing dye other than such a compound having a dissolution inhibiting ability is used, it is preferable to add a dissolution inhibitor described later to the upper layer.
- the addition amount of the infrared-absorbing dye is preferably 0.01% by mass to 50% by mass with respect to the total solid content of the image forming layer from the viewpoint of sensitivity and uniformity of the image forming layer. It is more preferable to add 1% by mass to 30% by mass, and more preferably 1.0% to 30% by mass.
- the image forming layer preferably contains a development inhibitor for the purpose of enhancing its inhibition (dissolution inhibiting ability).
- the development inhibitor used in this embodiment forms an interaction with an alkali-soluble resin such as the above-described novolak resin, and substantially has a solubility in the developer of the alkali-soluble resin in the unexposed area.
- an alkali-soluble resin such as the above-described novolak resin
- quaternary ammonium salts, polyethylene glycol compounds, etc. may be used as long as the interaction is weakened in the exposed area and the interaction is weakened and can be soluble in the developer.
- a compound that functions as a development inhibitor is used as the infrared absorbing dye, it is not always necessary to add a development inhibitor.
- the quaternary ammonium salt is not particularly limited, but is a tetraalkyl ammonium salt, a trialkylammonium salt, a dialkyldiammonium salt, an alkyl salt, and the like. Rutriaryl ammonium salts, tetraaryl ammonium salts, cyclic ammonium salts, and bicyclic ammonium salts.
- the addition amount of the quaternary ammonium salt is preferably 0.1% by mass to 50% by mass, more preferably 1% by mass to 30% by mass with respect to the total solid content of the upper layer. If it is less than 1% by mass, the effect of suppressing development is reduced, which is not preferable. In addition, when it is added in an amount exceeding 50% by mass, it may adversely affect the film forming property of the alkali-soluble resin.
- the polyethylene glycol compound is not particularly limited, and examples thereof include those having a structure represented by the following general formula (1).
- R 2 represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, an alkke. -Represents an alkyl group, an alkynyl group, an alkylyl group, an aryl group or an aryloyl group.
- R 3 represents an alkylene residue which may have a substituent, m represents an average of 10 or more, and n represents an integer of 1 to 4.
- Examples of the polyethylene glycol compound represented by the general formula (1) include polyethylene glycols, polypropylene glycols, polyethylene glycol alkyl ethers, polypropylene glycol alkyl ethers, polyethylene glycol aryls.
- Ethers polypropylene glycol ethers, polyethylene glycol alkyl ethers, polypropylene glycol alkyl ethers, polyethylene glycol glycerol esters, polypropylene glycol glycerol esters, polyethylene sorbitol esters, polypropylene glycol sorbitol esters Polyethylene glycol fatty acid esters, polypropylene glycol fatty acid esters, polyester Glycol modified Chirenjiamin, polypropylenes glycol of Echirenjiamin, polyethylene glycol diethylenetriamines, and Polypropylene glycol of diethylene tri ⁇ Min acids.
- the amount of the polyethylene glycol-based compound added is preferably 0.1% by mass to 50% by mass with respect to the total solid content of the upper layer. More preferably, it is mass%.
- the sensitivity is lowered, but it is effective to add a ratatoin compound.
- this developer is infiltrated into the exposed portion, that is, the image forming layer in the area where the inhibition is released, this developer becomes a new carboxylic acid compound. It is considered that the sensitivity is improved by the generation of an object and promoting the dissolution of the image forming layer in the exposed area.
- Such a ratatotony compound is not particularly limited, and examples thereof include compounds represented by the following general formula (LI) and general formula (L ⁇ ).
- X 1 , XX 3 and X 4 are each a divalent nonmetallic atom or a nonmetallic atomic group constituting a ring, Same or different! Moreover, these may each independently have a substituent. Further, at least one of X 1 , X 2 and X 3 in the general formula (L—I) and at least one of X 1 , X 2 , X 3 and X 4 in the general formula (L— ⁇ ) are:
- the substituent is preferably an electron-withdrawing substituent or a substituent substituted with an electron-withdrawing group.
- Such a nonmetallic atom or nonmetallic atomic group includes a methylene group, a sulfinyl group, a carbonyl group, a thiocarbol group, a sulfonyl group, a sulfur atom, an oxygen atom and a selenium atom. And more preferably an atomic group selected from the group consisting of a methylene group, a carbonyl group and a sulfonyl group.
- the electron-withdrawing substituent refers to a group in which the substituent constant p of No, Met takes a positive valence.
- substituent constant p of No Met takes a positive valence.
- Examples of electron-withdrawing groups in which the nommet substituent constant p takes a positive valence include halogen atoms [fluorine atoms (p value: 0.06), chlorine atoms (P value: 0.23), bromine atoms: 0.23), iodine atom (p value: 0.18)], trihaloalkyl group [tribromomethyl (p value: 0.29), trichloromethyl (p value: 0.33), trifluoromethyl (P value: 0.54), cyano group value: 0.66), -tro group (p value: 0.78), aliphatic aryl group or heterocyclic sulfo group [for example, methanesulfonyl (p value: 0.7)), aliphatic 'aryl or heterocyclic acyl groups [eg acetyl (p value: 0.50), benzoyl (p value: 0.43)], alkyl groups [eg C ⁇ CH ( p-value: 0.23)
- the electron-withdrawing group includes an amide group, an azo group, a nitro group, a fluoroalkyl group having 1 to 5 carbon atoms, a -tolyl group, an alkoxycarbo group group having 1 to 5 carbon atoms, and a carbon number.
- acyl groups 1 to 9 carbon alkyl groups, 6 to 9 carbon aryl groups, 1 to 9 alkyl sulfur groups, 6 to 9 carbon atoms
- Saltsulfiel group aryl group having 6 to 9 carbon atoms, thiocarbon group, fluorine-containing alkyl group having 1 to 9 carbon atoms, fluorine-containing alkyl group having 6 to 9 carbon atoms, and carbon atoms having 3 to 9 carbon atoms
- Nitro group fluorine-containing alkyl group having 1 to 5 carbon atoms, -tolyl group, alkoxycarbonyl group having 1 to 5 carbon atoms, carbon, which are preferably selected from fluorine-containing aryl groups, oxo groups and halogen elements
- the addition amount of the compounds represented by the general formula (LI) and the general formula (L ⁇ ) is preferably 0.1% by mass to 50% by mass with respect to the total solid content of the upper layer. The mass% is more preferable.
- any one kind may be used, or two or more kinds may be used in combination.
- two or more compounds of the general formula (LI) or two or more compounds of the general formula (L ⁇ ) are used, they can be used in any ratio as long as the total addition amount is within the above range.
- ⁇ -um salt includes diazo-um salt, ammonium salt, phospho-um salt, ododonium salt, sulfo-um salt, seleno-um salt, also-um salt, etc. Can be mentioned.
- the counter ions of o-um salt include tetrafluoroboric acid, hexafluorophosphoric acid, triisopropylnaphthalenesulfonic acid, 5-tro o toluenesulfonic acid, 5-sulfosalicylic acid, 2, 5 Dimethylbenzenesulfonic acid, 2, 4, 6 Trimethylbenzenesulfonic acid, 2-trobenzenesulfonic acid, 3-chlorobenzenesulfonic acid, 3-bromobenzenesulfonic acid, 2-fluorocaprylnaphthalenesulfonic acid, dodecylbenzenesulfone Examples include acid, 1 naphthol 5 sulfonic acid, 2 methoxy 1-4 hydroxy 1 5 benzoyl-benzenesulfonic acid, and paratoluenesulfonic acid. Of these, alkyl aromatic sulfonic acids such as hexafluorophosphoric acid,
- naphthoquinone mono (1, 2) -diazido 4-sulfonic acid chloride and ester of phenol formaldehyde aldehyde resin or creso-one formaldehyde resin, naphthoquinone mono (1, 2) -diazido 4-sulfonic acid chloride and pyrogallol Esters with -acetone rosin are also preferably used.
- the addition amount of the quinonediazide compound is preferably 1% by mass to 50% by mass and more preferably 5% by mass to 30% by mass with respect to the total solid content of the image forming layer. More preferably, the content is 10% by mass to 30% by mass.
- These compounds can be used alone, but may be used as a mixture of several kinds.
- a polymer having a polymerization component of a (meth) acrylate monomer having 2 or 3 fluoroalkyl groups is preferable to use.
- the addition amount is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, based on the total solid content of the image forming layer.
- acid anhydrides for the purpose of improving sensitivity, acid anhydrides, phenols, and organic acids may be added to the image forming layer.
- cyclic acid anhydrides are preferred.
- Specific examples of cyclic acid anhydrides include phthalic anhydride and tetrahydroanhydride described in US Pat. No. 4,115,128. Taric acid, hexahydrophthalic anhydride, 3,6-Endoxytetrahydrophthalic anhydride, tetrachlorophthalic anhydride, maleic anhydride, chloromaleic anhydride, phenyl maleic anhydride, succinic anhydride, pyromellitic anhydride, etc. Can be used.
- Examples of the acyclic acid anhydride include acetic anhydride.
- phenols include bisphenol A, 2, 2'-bishydroxysulfone, p-trophenol, p ethoxyphenol, 2, 4, 4, monotrihydroxybenzophenone, 2, 3, 4 -tri Hydroxybenzophenone, 4-hydroxybenzophenone, 4, 4 ', 4 "trihydroxymethane, 4, 4', 3", 4 "—tetrahydroxy 1,3,5,3 ', 5'-tetramethyl triphenyl -Lumethane and so on.
- organic acids include sulfonic acids, sulfinic acids, alkylsulfuric acids, phosphonic acids, phosphate esters and the like described in JP-A-60-88942, JP-A-2-96755, and the like.
- Specific examples include p-toluenesulfonic acid, dodecylbenzenesulfonic acid, p-toluenesulfinic acid, ethylsulfuric acid, phenylphosphonic acid, phenylphosphinic acid, phosphoric acid phenol, and phosphoric acid diphenol.
- Benzoic acid isophthalic acid, adipic acid, p-toluic acid, 3,4-dimethoxybenzoic acid, phthalic acid, terephthalic acid, 4 cyclohexene mono 1,2-dicarboxylic acid, erucic acid, lauric acid, Examples include n-undecanoic acid and ascorbic acid.
- the proportion of the above acid anhydrides, phenols and organic acids in the total solid content of the lower or upper layer is preferably 0.05% by mass to 20% by mass, and 0.1% by mass to 15% by mass. Is more preferably 0.1% by mass to 10% by mass.
- nonionic surfactant examples include sorbitan tristearate, sorbitan monopalmitate, sorbitan trioleate, stearic acid monoglyceride, polyoxyethylene no- urel ether, and the like.
- amphoteric activators include alkyldi (aminoethyl) glycine, alkylpolyaminoethyl glycine hydrochloride, 2-alkyl-N monocarboxyethyl-N hydroxyethyl imidazolium umbetaine and N-tetradecyl-N, N Betaine type (for example, trade name “Amogen K” manufactured by Daiichi Kogyo Co., Ltd.)
- siloxane-based compounds block copolymers of dimethylsiloxane and polyalkyleneoxide are preferred, manufactured by Chisso Corporation, DBE-224, DBE-6 21, DBE-712, DBP.
- Polyalkyleneoxide-modified silicones such as —732, DBP—534, Tego, Germany, and TegoGlidelOO.
- the proportion of the nonionic surfactant and amphoteric surfactant in the total solid content of the image forming layer is preferably from 0.01% to 15% by mass, and from 0.1% to 5% by mass. More preferably, 0.05% by mass to 0.5% by mass is even more preferable.
- a print-out agent for obtaining a visible image immediately after heating by exposure and a dye or pigment as an image colorant can be added to the image forming layer.
- Examples of the printing-out agent include a combination of a compound capable of releasing an acid (photoacid releasing agent) upon heating by exposure and an organic dye capable of forming a salt.
- a compound capable of releasing an acid photoacid releasing agent
- an organic dye capable of forming a salt e.g., o-naphthoquinone diazide 4-sulphonate halides and salt-forming organic dyes described in JP-A Nos. 50-36209 and 53-8128, Kaisho 53-36223, 54 —
- Combinations of trihalomethyl compounds and salt-forming organic dyes described in the publications 74728, 60-3626, 61-143748, 61-151644, and 63-58440 Can be mentioned.
- Such trihalomethyl compounds include oxazole compounds and triazine compounds, both of which have excellent temporal stability and give clear printout images.
- Oil-soluble dyes and basic dyes can be listed as suitable dyes, including salt-forming organic dyes. Specifically, oil yellow # 101, oil yellow # 103, oil pink # 312, oil green BG, oil blue BOS, oil blue # 603, oil black BY, oil black BS, oil black T-505 (or more, Orient Chemical) Industrial Co., Ltd., Victoria Pure Blue, Crystal Violet Lactone, Crystal Violet (CI42555), Methyl Violet (CI42535), Ethyl Violet, Rhodamine B (CI145170B), Malachite Green (CI42000), Methylene Blue (CI52015) And so on.
- the dyes described in JP-A-62-293247 are particularly preferred.
- the amount of addition of these dyes is preferably from 0.01% by mass to 10% by mass, more preferably from 0.1% by mass to 3% by mass, based on the total solid content of the lower layer or the upper layer.
- a plasticizer may be added to the image forming layer in order to impart flexibility and the like of the coating film.
- butterphthal polyethylene glycol, tributyl taenoate, diethyl phthalate, dibutyl phthalate, dihexyl phthalate, dioctyl phthalate, tricresyl phosphate, tributyl phosphate, trioctyl phosphate, tetrahydrofurfuryl oleate
- the amount of these plasticizers added is preferably 1% by mass to 20% by mass, more preferably 2% by mass to 5% by mass, based on the total solid content of the image forming layer.
- a compound that lowers the coefficient of static friction of the surface can be added for the purpose of imparting resistance to scratches.
- US Pat. No. 6,117,913, Japanese Patent Application No. 2001-261627, Japanese Patent Application No. 2002-0332904, Japanese Patent Application No. 2002-165584 examples thereof include compounds having esters of long-chain alkyl carboxylic acids.
- the addition amount of the WAX agent is preferably 0.1% by mass to 10% by mass, more preferably 0.5% by mass to 5% by mass with respect to the entire image forming layer.
- the image forming layer can be usually formed by applying each of the above components to a solvent and applying the solution onto a suitable support.
- the image forming layer may have a single layer structure or a multilayer structure.
- Solvents used here include ethylene dichloride, cyclohexanone, methyl ethyl ketone, methanol, ethanol, propanol, ethylene glycol monomethino ether, 1-methoxy-2-propanol, 2-methoxyethyl Acetate, 1-methoxy-2-propyl acetate, dimethoxyethane, methyl lactate, ethyl lactate, N, N-dimethylacetamide, N, N-dimethylformamide, tetramethylurea, N-methylpyrrolidone, dimethylsulfoxide, sulfolane , ⁇ -Power that can raise butaguchi rataton, toluene, etc.
- a protective layer, an undercoat layer, and the like can be provided in addition to the image forming layer according to the purpose.
- a lower layer containing a water-insoluble and alkali-soluble resin can be provided between the support and the image forming layer.
- An image forming layer having a multilayer structure can be formed by such a lower layer and the image forming layer.
- the lower layer itself needs to express high alkali solubility, particularly in the non-image area, so it is necessary to select a resin that does not impair this property. is there.
- an alkali-soluble resin other than the novolak resin in the description of the image forming layer described above is preferable.
- a resin having excellent solubility in an alkaline developer that is less likely to form an interaction than the novolak resin used in the image forming layer.
- polyamide oil, Epoxy Preferable examples include a resin, an acetal resin, an acrylic resin, a methallyl resin, a styrenic resin, and a urethane resin.
- the surface of the image forming layer provided as described above is provided with a mat layer in order to reduce the time for evacuation during adhesion exposure using a vacuum baking frame and to prevent burning blur. May be. Specific examples include a method of providing a mat layer and a method of thermally depositing a solid powder.
- a coating layer made of an organic polymer compound (hereinafter also referred to as “backcoat layer”) may be provided as necessary.
- a group force consisting of saturated copolymerized polyester resin, phenoxy resin, polybulassal resin, and salt vinylidene copolymer resin having a glass transition point of 20 ° C or higher is also selected. It is preferable to use at least one kind of rosin.
- the saturated copolymerized polyester resin acts as a dicarboxylic acid unit and a diol unit.
- the dicarboxylic acid unit include aromatic dicarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid, tetrabromophthalic acid, and tetrachlorophthalic acid; adipic acid, azelaic acid, succinic acid, oxalic acid, Examples thereof include saturated aliphatic dicarboxylic acids such as suberic acid, sebacic acid, malonic acid and 1,4-cyclohexanedicarboxylic acid.
- the backcoat layer further comprises a dye or pigment for coloring, a silane coupling agent for improving adhesion to the support, a diazo resin such as diazonium salt, an organic phosphone.
- a diazo resin such as diazonium salt
- an organic phosphone such as diazonium salt
- the thickness of the knock coat layer is basically from 0.01 ⁇ m to 8 ⁇ m as long as it does not damage the image forming layer even if there is no interleaf. If the thickness is less than 0.01 ⁇ m, it is difficult to prevent scratches on the image forming layer when the planographic printing plate precursors are handled in layers. If the thickness exceeds 8 / zm, the medicine used around the lithographic printing plate during printing Depending on the product, the backcoat layer may swell and the thickness may vary, and the printing pressure may change and the printing characteristics may deteriorate.
- Various methods can be used for providing the knock coat layer on the back surface of the planographic printing plate precursor. For example, a method in which the above components for the back coat layer are dissolved in an appropriate solvent and applied as a solution, or an emulsion dispersion is applied and dried; A method of laminating to a lithographic printing plate precursor by heat; a method of forming a molten film with a melt extruder and laminating to a lithographic printing plate precursor.
- the most preferable method for securing a suitable thickness is a method in which the components for the backcoat layer are dissolved in a suitable solvent, applied as a solution, and dried.
- either the back-coat layer on the back surface or the image-forming layer on the front surface may be provided on the support first, or both may be provided simultaneously.
- the lithographic printing plate precursor thus obtained is cut into an appropriate size, if necessary, exposed, developed and subjected to plate making to obtain a lithographic printing plate.
- a lithographic printing plate precursor provided with a visible light exposure type plate-making layer photosensitive plate-making layer
- the transparent film on which the printed image is formed is exposed by irradiating with normal visible light, and then developed. It is possible to make a plate by performing.
- a lithographic printing plate precursor provided with a laser exposure type plate-making layer exposure can be carried out by directly writing a printed image by irradiating various laser beams, and then developing to make a plate.
- hot air drying was performed in the hot air drying unit 32 and then steam drying was performed in the steam atmosphere drying unit 30 under the conditions shown in Table 1 of FIG.
- Switching from the hot air drying unit 32 to the steam atmosphere drying unit 30 was performed immediately after the coating film solidified (drying point).
- the amount of ⁇ -butyrolatatone remaining in the coating film was lOO mg / m 2 .
- the temperature of the web 12 can be set by changing the hot air drying temperature and drying time in the hot air drying section 32. Adjusted to constant temperature.
- the maximum temperature reached by the web 12 at the outlet of the drying device 20 in FIG. 2 was measured.
- Example 1-1 using water vapor at 140 ° C and Example 1-2 using MEK vapor at 110 ° C, V and deviation were also within chamber 38. It was found that even if the temperature of the web 12 was relatively low, the amount of residual ⁇ -petit ratatoton in the coating film could be removed in a short time.
- the hot air drying unit 32 performed hot air drying, and then the steam atmosphere drying unit 30 performed steam drying. Switching from the hot air drying section 32 to the steam atmosphere drying section 30 was performed immediately after the coating film was solidified (drying point). Immediately after this drying point, the amount of remaining ⁇ -butyrolatatone in the coating film was lOO mg / m 2 .
- the temperature of the web 12 was adjusted to the set temperature by changing the hot air drying temperature and drying time in the hot air drying section 32. The web 12 was the same as that used in Example 1-1. (Drying conditions in the steam atmosphere drying section 30)
- Example 2-2 Example 2-3, and Comparative Example 2-7 in which the low-boiling point solvent was not included!
- the amount of residual ⁇ -petit-mouth ratataton was measured.
- Comparative Example 2-7 the hot air drying was performed at a hot air temperature of 140 ° C and a drying time of 60 seconds. The result is shown in FIG.
- Example 2-2 the amount of residual ⁇ -petit ratataton in the coating film for the image forming layer was significantly larger than that in Comparative Example 2-7 dried in dry air. Diminished. Furthermore, the temperature difference between the aluminum web and water vapor is larger than that in Example 2-2, and in Example 2-3, the amount of residual ⁇ -petit-mouth rataton is further reduced than in Example 2-2. .
- the web 12 can be dried at a relatively low temperature in a short time, and the energy required for drying can be reduced.
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Abstract
Description
Claims
Priority Applications (5)
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CN200780001808XA CN101360965B (zh) | 2006-05-18 | 2007-05-18 | 被干燥物的干燥方法及装置 |
KR1020087015287A KR101309055B1 (ko) | 2006-05-18 | 2007-05-18 | 피건조물의 건조 방법 및 장치 |
US12/160,022 US8196312B2 (en) | 2006-05-18 | 2007-05-18 | Drying method and apparatus for drying object |
EP07743697.0A EP1967803B1 (en) | 2006-05-18 | 2007-05-18 | Method for drying a coated film |
JP2007548255A JP4092593B2 (ja) | 2006-05-18 | 2007-05-18 | 被乾燥物の乾燥方法及び装置 |
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US (1) | US8196312B2 (ja) |
EP (1) | EP1967803B1 (ja) |
JP (1) | JP4092593B2 (ja) |
KR (1) | KR101309055B1 (ja) |
CN (1) | CN101360965B (ja) |
WO (1) | WO2007136005A1 (ja) |
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Also Published As
Publication number | Publication date |
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KR101309055B1 (ko) | 2013-09-16 |
JPWO2007136005A1 (ja) | 2009-10-01 |
KR20090009771A (ko) | 2009-01-23 |
CN101360965B (zh) | 2010-12-22 |
JP4092593B2 (ja) | 2008-05-28 |
CN101360965A (zh) | 2009-02-04 |
EP1967803A4 (en) | 2014-05-07 |
EP1967803A1 (en) | 2008-09-10 |
US20100058609A1 (en) | 2010-03-11 |
US8196312B2 (en) | 2012-06-12 |
EP1967803B1 (en) | 2016-09-28 |
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