TW201244906A - Method for heating plastic film, and method for producing color filter - Google Patents

Abstract

A method for heating plastic film, wherein first, a belt-shaped plastic film (1) is wrapped around a core (5) with a supporting member (2) interposed therebetween the plastic film (1), and a wrapped body (4) of the plastic film (1) is formed in a manner such that the supporting member (2) causes an air gap layer (3) to be formed between the plastic film (1). Next, the wrapped body (4) of the plastic film (1) is put in a heating furnace (10), after which the wrapped body (4) of the plastic film (1) is heated to a prescribed temperature in the heating furnace (10).

Description

201244906 VI. Description of the Invention: [Technical Field] The present invention relates to a method for heating a plastic film for heating a strip-shaped plastic film, and a method for manufacturing a color filter comprising the method, and more particularly to uniform and rapid heating A method of heating a plastic film of a plastic film, and a method of manufacturing a color filter. [Prior Art] In recent years, in a display member constituting a color filter or a TFT array, a substrate having a pattern having a predetermined function as a metal or a resin is used for a flexible roll shape. Plastic film is studied. By forming the substrate into a plastic material, the color filter or the TFT array can be made thinner and lower in cost, and the breakage of the substrate can be prevented. Thus, the substrate is formed with a predetermined functionality. In the case of the pattern, the baking (sintering) treatment is generally performed for the purpose of hardening promotion, reaction promotion, adhesion improvement, thermal stability improvement, impurity removal, and the like. When the substrate is composed of glass, since the glass has heat resistance, the substrate on which the pattern is formed can be put into a so-called baking furnace and baked at a relatively high temperature. However, when the substrate is composed of a flexible resin material, since the heat resistance of the resin is low, it is difficult to carry out the baking treatment without causing deformation of the substrate. In order to cope with this situation, a method of baking a sheet-like substrate shown in Patent Document 1 is known. Among them, the thin 201244906 sheet-like substrate which is pulled out from the take-up roll is baked while being conveyed by the leather belt in the baking oven. [PRIOR ART DOCUMENT] [Patent Document 1] [Patent Document 1] JP-A-2005-148352 SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) When a sheet-like substrate is baked by the method disclosed in Patent Document 1, At the time of the treatment, in order to reliably heat the sheet-like substrate, it is necessary to increase the heating zone in the baking furnace or to lower the conveying speed of the sheet-like substrate. However, in the case of the former, it is difficult to uniformly maintain the temperature distribution in the baking furnace due to the increase in the heating zone, and it is difficult to uniformly maintain the temperature distribution in the baking furnace. In the latter case, the baking treatment time increases, regardless of the situation. There is a problem of reduced energy efficiency. Further, when the sheet-like substrate is continuously conveyed in the heating zone in the baking furnace as described above, it is necessary to provide the inlet and outlet of the sheet-like substrate in the baking furnace, and the sealing property inside the baking furnace is lowered. In this case, the temperature distribution in the baking furnace is also deviated, and it is difficult to uniformly heat the sheet-like substrate. The present invention has been made in view of the above circumstances, and aims to provide a uniform and rapid A heating method for heating a plastic film of a plastic film, and a method for producing a color filter comprising the method. (technical means to solve the problem)

-6- S 201244906 The present invention provides a method for heating a plastic film, which is characterized in that the support member is interposed between the plastic films, and the strip-shaped plastic film is taken up to the core material to make the gap by the support member. The layer interposing between the plastic film to form a winding body of the plastic film, the winding body of the plastic film is put into the heating furnace process, and the plastic film is heated at a desired temperature in the heating furnace. The process of taking up the body. In the heating method of the plastic film, the plastic film may be wound up by a tension per unit area of IN/mm 2 or less in the process of forming the wound body of the plastic film. Further, in the heating method of the plastic film, the core material may be composed of a resin, and in the process of heating the wound body of the plastic film, the plastic film is heated at a temperature lower than a glass transition point of the core material. Further, in the heating method of the plastic film, the supporting member may be constituted by a resin, and in the process of heating the winding body of the plastic film, the plastic film is heated at a temperature lower than a glass transition point of the supporting member. Further, in the heating method of the plastic film, the support member may be composed of a resin having a glass transition point or more of a glass transition point of the plastic film. Further, in the heating method of the above plastic film, the supporting member may be constituted by the same material as the plastic film.

Further, in the heating method of the plastic film, the pattern may be formed by a resin on a plastic film which is taken up in a core material in a process of forming a wound body of a plastic film. Further, in the heating method of the plastic film described above, the support member may be disposed in a region other than the pattern in the plastic film in the process of forming the winding body of the 201244906 plastic film. The present invention provides a method of producing a color filter, comprising: preparing a process for preparing a strip-shaped plastic film, applying a photosensitive material containing a resin for forming a color filter to a plastic film, and drying the film The photosensitive material is exposed and developed in a predetermined shape to form a pattern of the pattern formed of the photosensitive material on the plastic film, and the plastic film and pattern are heated by performing the heating method of the plastic film described above. The process is to obtain a color filter. Advantageous Effects of Invention According to the present invention, since the strip-shaped plastic film is taken up and heated by the winding body, the entire strip-shaped plastic film can be heated at one time. Further, since the void layer is interposed between the plastic films by the supporting member, the heat generated by the heating furnace can be transmitted to the entire plastic film via the void layer. Therefore, the plastic film can be uniformly and rapidly heated. Further, according to the present invention, since the strip-shaped plastic film formed of the photosensitive material containing the color filter forming resin is taken up and heated to form a wound body, the plastic film can be heated at one time. And the whole picture. Further, since the void layer is interposed between the plastic film by the supporting member, the heat generated by the heating furnace can be transmitted to the entire plastic film and the pattern through the void layer. Therefore, the plastic film and pattern can be uniformly and rapidly heated, and the adhesion between the plastic film and the pattern can be improved.

-8- S 201244906 [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the winding body 4 of the plastic film 1 of the present embodiment will be described with reference to Fig. 1. The take-up body 4 of the plastic film cartridge of the present embodiment is obtained by winding a plastic film 1 of a pattern 6 of a predetermined shape in which a color filter 7 is formed of a resin into a roll shape. That is, the pattern 6 formed on the plastic film 1 is composed of a photosensitive material containing a resin for forming the color filter 7, and has a desired function for the color filter 7. In the present embodiment, a black matrix, a red pixel, a green pixel, or a blue pixel for the color filter 7 is formed as the pattern 6 as described above. As shown in FIG. 1, the take-up body 4 of the plastic film 1 is obtained by sandwiching the support member 2 between the plastic film 1 and winding the tape-shaped plastic film 1 having the pattern 6 on the cylindrical core material 5. And formed by interposing the void layer 3 between the plastic film 1 by the support member 2. Among them, the support member 2 is preferably disposed on a region other than the pattern 6 of the plastic film 1. Thereby, the damage of the pattern 6 can be prevented. In the present embodiment, as shown in Fig. 1 and Fig. 2(a) and Fig. 2(b), the support member 2 is preferably disposed at both edge portions in the longitudinal direction of the plastic film 1, and the take-up body of the plastic film 1. 4 The plastic film 1 is taken up in a roll form. Specifically, in the width direction of the plastic film 1, the support member 2 is preferably disposed in a region in which both edge portions in the longitudinal direction are within 1/3 of the width of the plastic film 1. The support member 2 can partially protrude from the both edge portions of the long side direction 201244906 of the plastic film 1 as long as it can maintain the state in which the plastic film 1 is not in contact with each other. The plastic film 1 is preferably taken up by a tension per unit sectional area of 1 N/mm 2 or less. Further, it is preferable to take up substantially without applying tension. Thereby, the stretching tension can be prevented from remaining on the wound plastic film 1, and the plastic film 1 can be prevented from being deformed by the heat treatment. Further, a coiler (not shown) for taking up the plastic film 1 can be used generally. Further, the number of windings of the plastic film 1 is preferably appropriately selected depending on the use and the like. Next, the material of the plastic film 1 will be described. The plastic film 1' of the present embodiment may have flexibility such that it can be wound into a roll shape, and it is required to have transparency, lightness, and the like which can be used as the color filter 7. Examples of the material of the plastic film 1 include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether oxime (PES;), polyimine (PI), and poly Carbonate (PC), cyclic polyolefin (COP) 'Polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), nylon 66 (6 6N), acrylonitrile-butyl Synthetic resins such as olefin-phenylene (ABS), polyethylene (PE) 'polypropylene (PP), polytetrafluoroethylene (PTFE), polyetheretherketone (peek), polyphenylsulfuric acid (PPS), and the like. Further, the thickness of the plastic film 1 is preferably in the range of l; / m to lOOOym, particularly preferably in the range of l 〇 V m to 500 / zm, more preferably in the range of 50 μ m to 2 5 〇 vm. . This is due to the plastic film! When the thickness is thicker than the above range, it is likely to be broken due to the loss of flexibility, and it is difficult to form the wound body 4 of the plastic film 1. On the other hand, when it is thinner than the above range,

-10- S 201244906 Loss of support, it is difficult to deal with in various processes. The width of the plastic film 1 is not particularly limited, but is preferably in the range of, for example, 100 mm to 1 000 mm, and particularly preferably in the range of 150 mm to 600 mm. The plastic film 1 may be formed of a single layer or may have a laminate of a plurality of layers. Next, the support member 2 will be described. The support member 2 of the present embodiment is a belt-shaped member for forming the void layer 3 between the plastic films 1 wound around the core material 5. Thus, the support member 2 is preferably flexible and has a high mold release property. It is not particularly limited. In particular, the support member 2 is used when the plastic film 1 is taken up, and is not a component of the color filter 7, so that an opaque material can be used, and for example, a tape-like metal or the like can be used. The support member 2 may be composed of a resin having a higher glass transition point than the glass transition point of the plastic film 1. Thereby, the support member 2 can be prevented from being fixed to the plastic film 1 at the time of heat treatment. At this time, for example, the above-mentioned PTFE, PI, metal, or the like can be used as the support member 2 to impart heat resistance. Alternatively, the support member 2 may be composed of the same material as the plastic film 1. At this time, since the plastic film 1 and the supporting member 2 have the same thermal expansion coefficient, the plastic film 1 can be prevented from being deformed during the heat treatment. Further, the thickness of the support member 2 is preferably in the range of 20 v m to 20 0 m, and more preferably in the range of 50 / zm to 150 / zm. When the thickness of the support member 2 is thinner than the above range, the void layer 3 may be damaged when the plastic film i is wound, and the plastic film 1 is easily contacted with each other. When the thickness is thicker than the above range, it is difficult to take up the plastic film 1 The reason. The width of the support member 2 is preferably 3% or more and 30% or less with respect to the width of the plastic film 1, and specifically, preferably 5 to 80 mm' is preferably 10 to 50 mm. Since the plastic film 1 is easily in contact with each other in the central portion of the width direction of the plastic film 1 when the width of the support member 2 is smaller than the above range, the support member 2 is formed on the plastic film 1 The pattern 6 is in contact. Further, the support member 2 may be composed of a porous material. In this case, for example, a polyethylene porous sheet (Sunmap manufactured by Nitto Denko Corporation), a microporous biaxially stretched polypropylene (Yupo manufactured by Yupo Corporation), a nonwoven fabric, or the like can be preferably used. In this case, the surface roughness (Ra) of the porous sheet is preferably 1/zm or more, more preferably 2 μm or more, and still more preferably 5/zm or more. When the Ra is smaller than the above range, the gap of the support member 2 is reduced, and the gas permeability and the moisture permeability are lowered. The Ra of the porous sheet is usually 10 / / m or less. In addition, the "surface roughness (Ra)" referred to herein is "arithmetic mean roughness" and is measured in accordance with 13-B 0 6 0 1 . Further, as shown in Fig. 2 (〇, (d), irregularities may be formed on the surface of the support member 2. Thereby, the air permeability is imparted to the void layer by the recess 2a of the support member 2; Therefore, the sublimation substance 'sublimated from the plastic film 1 or the pattern 6 composed of the photosensitive material by heat treatment can be released from the void layer 3, and the sublimation substance can be prevented from adhering to the plastic film 1 or Fig. 6. At this time, an embossed film formed with irregularities can be used as the support member 2. The embossed film can have, for example, a relatively large contact area with the plastic film 1 of about 0.1 mm 2 to 100 mm 2 . The interval of the unevenness is, for example, approximately 〇·1 mm~1 〇mm.

-12- S 201244906 A large interval' is preferable because the gas permeability can be imparted to the void layer 3. Further, the embossed film may be, for example, a general-purpose carrier tape or the like, or a member having any irregular shape formed by press molding or the like. Next, the core material 5 will be described. The core material 5 is not particularly limited as long as it does not melt and ignite at the temperature of the heat treatment, and plastic, paper, metal, etc. can be used. In general, since the metal has a smaller coefficient of thermal expansion than the plastic, the core material 5 prevents the plastic film 1 from being further expanded during the heat treatment, and prevents the plastic film 1 from being deformed. Alternatively, a resin having a thermal expansion coefficient equivalent to that of the plastic film 1 can be used, in particular, the same material as the plastic film 1. At this time, since the plastic film 1 and the core material 5 have the same thermal expansion operation, the plastic film 1 can be prevented from being deformed during the heat treatment. The length of the core material 5 may be equal to or greater than the width of the plastic film 1. Thus, deformation of both edge portions in the longitudinal direction of the plastic film 1 can be prevented. Further, the diameter of the core material 5 is preferably 3 吋 or 6 一般 of the normal diameter. However, in order to form the winding body 4 of the plastic film 1, the winding workability can be considered to be 6 。. Further, the thickness of the core material 5 is not particularly limited as long as it has the strength for winding up the plastic film 1, and may be 1 to 10 mm, preferably 3 to 5 mm. In order to improve the heat treatment efficiency of the take-up body 4 of the plastic film 1, it is preferable to reduce the volume of the core material 5 to lower the heat capacity. Next, the heating furnace of this embodiment will be described. The heating furnace is preferably a so-called oven 10 as shown in Figs. 3 and 4. In the inside of the baking oven, since the gas (usually air, depending on the situation, an inert gas such as nitrogen can be used) convection to uniformly control the internal temperature, it can be uniformly and efficiently heated (-13-201244906) Bake) All of the plastic film 1 In the baking oven 10, a dust-free baking oven (for example, a dust-free baking oven PVHC series manufactured by ESPEC Co., Ltd.) can be suitably used. When the winding body 4 of the plastic film 1 is heated in the baking oven 1 as shown in Fig. 3, the winding body 4 of the plastic film 1 can be disposed (longitudinally disposed) in the net in the baking oven 10. The frame 11 is oriented such that the axial direction is vertical. Alternatively, as shown in Fig. 4, the cylindrical holding member 12 is passed through the hollow portion of the cylindrical core member 5, the bearing member 13 is attached to the grid 11 in the baking oven 1b, and the holding member 12 is held. Both ends are attached to the bearing member 13 to set (laterally) the take-up body 4 of the plastic film 1. Thus, the plastic film 1 can be provided with the take-up body 4 without contacting the grid 11 or the inner wall of the baking oven 10, whereby the entire plastic film 1 can be uniformly heated. In the baking oven 10, when the core material 5 is composed of a resin, it is preferably a temperature lower than the glass transition point of the core material 5, and when the support member 2 is composed of a resin, it is preferably the support. The plastic film 1 is heated at a temperature below the glass transition point of the member 2. Thereby, deformation of the core material 5 and the support member 2 can be prevented, and deformation of the plastic film 1 due to heating can be prevented. The heating temperature of the oven 1 可 can be a temperature above the glass transition point as long as it is lower than the melting point of the plastic film 1. Next, the action of the present embodiment formed by the above-described configuration, that is, the heating method of the plastic film 1 of the present embodiment, and the method of manufacturing the color filter including the method will be described with reference to Fig. 5. First, prepare to take up the strip-shaped plastic film 1 (process S1) -14-

S 201244906 Next, the plastic film 1 wound into a roll shape is pulled out, and the photosensitive material containing the resin for forming the color filter 7 is applied to the drawn plastic film 1 (process S2). That is, a photosensitive material made of a black matrix, a red pixel, a green pixel, or a blue pixel for the color filter 7 is applied to the plastic film 1. The coated photosensitive material is then dried (process S3). Then, a photosensitive material having a predetermined shape (not shown) is used to expose the photosensitive material on the plastic film 1 (process S4). Next, the exposed photosensitive material is developed (process S5). Thereby, a pattern 6 composed of a photosensitive material is formed on the plastic film 1. The plastic film 1 is then heated. At this time, first, the support member 2 is interposed between the plastic film 1 to wind the tape-shaped plastic film 1 on the core material 5, and the void layer 3 is interposed between the plastic film 1 by the support member 2 to form. The winding body 4 of the plastic film 1 (process S6). Here, the support member 2 is disposed in a region other than the pattern 6 of the plastic film 1, in particular, at both edge portions in the longitudinal direction of the plastic film 1. Further, as described above, the plastic film 1 is preferably wound up by a tension per unit sectional area of 1 N/mm 2 or less. Next, the winding body 4 of the plastic film 1 is put into a preheating to a desired temperature. Baking oven 1 (Process S7). The wound body 4 to be placed is placed in the baking oven 1 in the form shown in Fig. 3 or Fig. 4. Next, the winding body 4 of the plastic film 1 is heated (baked) at a desired temperature in the baking oven 1 (process S8). After the end of the heat treatment, the roll -15-201244906 of the plastic film 1 is taken out from the baking oven 1 (Process S 9). By repeating the above-described processes S2 to S9, a black matrix, a red pixel, a green pixel, and a blue pixel can be sequentially formed on the plastic film 1. Thus, the plastic film 1 is formed with a pattern 6 having a functional color for the color filter 7, and a color filter 7 is obtained (see Fig. 2). As described above, according to the present embodiment, the strip-shaped plastic film 1 in which the pattern 6 is formed by exposing and developing the photosensitive material is taken up and heated by the winding body 4, so that the plastic film 1 and the pattern can be heated at one time. 6 overall. Further, since the void layer 3 is interposed between the plastic films 1 by the support member 2, heat generated in the baking oven 1 can be transmitted to the entire plastic film 1 and the pattern 6 via the void layer 3. Therefore, the plastic film 1 and the pattern 6 can be uniformly and rapidly heated, and the adhesion of the plastic film 1 to the pattern 6 can be improved. Further, according to the present embodiment, since the strip-shaped plastic film 1 in which the pattern 6 is formed is taken up by sandwiching the support member 2 between the plastic films 1, the plastic film 1 can be prevented from coming into contact with each other and fixed by heating, and It can prevent deformation of the plastic film 1 and the pattern 6. In particular, the plastic film 1 is taken up by interposing the support member 2, as long as the heating temperature of the baking oven 10 is lower than the melting point of the plastic film 1, even at a temperature above the glass transition point, the plastic film 1 and the figure can be prevented. Type 6 is deformed. In the present embodiment, a black matrix, a red pixel, a green pixel', and a blue color for the color filter 7 are formed on the plastic film 1 which is taken up in a embossed form and heated in the baking oven 10. An example of a pixel. However, it is not limited to this. It can also be formed on the plastic film 1 by optical

S -16- 201244906 A resin such as an alignment film, a lens array, a retardation layer, a polarizing layer, or a light guide plate of a member to form a pattern. At this time, the plastic film 1 and the above-mentioned pattern can be prevented from being deformed, and the film can be uniformly and rapidly heated, and the adhesion of the plastic film 1 to the above pattern can be improved. Alternatively, on the plastic film 1, in order to form a conductive wiring as a driving circuit, a TFT array 'or a metal layer of a predetermined shape constituting a transparent electrode (not shown), a resist layer may be formed by etching a resin. . That is, the metal layer is provided on the plastic film 1, and a resist material containing an etching resin is applied onto the metal layer, dried, exposed, and developed to form a pattern composed of a resist layer, and then The pattern is subjected to a heating (baking) treatment in which the plastic film 1 is wound into a rolled form and heated in a baking oven 10. At this time, the plastic film 1 and the above-mentioned pattern can be prevented from being deformed, and the heating can be uniformly and rapidly heated, and the adhesion of the metal layer to the above pattern can be improved. Modification of the Invention Next, a modification of the method for heating the plastic film of the present invention and a method for producing the color filter including the method will be described. In the present modification, the plastic film in which the pattern is not formed is wound into a embossed form and heated in a baking oven, and the other configuration is substantially the same as that of the embodiment shown in Figs. 1 to 5 . In the present modification, the strip-shaped plastic film 1 in which the pattern 6 is not formed is wound into a embossed form and heated in the baking oven 1 crucible. That is, before the photosensitive material for forming the pattern 6 is applied to the plastic -17-201244906 film 1 (before the process S2 shown in FIG. 5), the tape-shaped plastic film 1 is taken up into a roll form. To heat treatment. According to the present modification, since the plastic film 1 is heated to cause heat shrinkage before the pattern 6 is formed on the plastic film 1, the heating (baking) treatment of the plastic film 1 on which the pattern 6 is formed is performed. The plastic film 1 can be prevented from shrinking, and the dimensional accuracy of the pattern 6 formed on the plastic film 1 can be improved. Further, according to the present modification, since the strip-shaped plastic film 1 is taken up and the winding body 4 is formed and heated, the entire strip-shaped plastic film 1 can be heated at a time. Further, since the void layer 3 is interposed between the plastic films by the support member 2, the heat generated by the baking oven 10 can be transmitted to the plastic film through the gap layer 3. Therefore, the plastic film 1 can be uniformly and rapidly heated. Further, according to the present modification, since the strip-shaped plastic film 1 is taken up by sandwiching the support member 2 between the plastic films 1, the plastic film can be prevented! They are in contact with each other and fixed by heating, and can prevent deformation of the plastic film 1. In particular, the plastic film 1 is taken up by interposing the support member 2, as long as the heating temperature of the baking oven 10 is lower than the melting point of the plastic film 1, even at a temperature above the glass transfer point, the plastic film 1 can be prevented. Deformation occurs. [Examples] Example 1 First, heating was performed by the heating method of the plastic film of the present invention.

S -18- 201244906 After the plastic film 1 is deformed, investigate. First, a PET film having a width of 300 mm and a length of 10 m (Cosmo Shine A4100, thickness: 125 μm, glass transfer point: 70 to 110 ° C, melting point: 258 ° C) was prepared as a plastic film 1 'and a width of 30 was prepared. A polyimide film of mm and a length of 10 m (Kapton Film manufactured by Teijin DuPont Film Co., Ltd., thickness: 75 vm, glass transition point: 400 t or more) was used as the support member 2. The polyimide film is disposed on both edge portions of the PET film in the longitudinal direction (specifically, a position 30 mm away from both edge portions), and is taken up in a cylinder at a tension per unit area of 1 N/mm 2 The core material (inner diameter: 3 Å) 5 was formed to form a wound body 4 in which a PET film having a void layer 3 having a thickness of 75 μm was interposed. At this time, it was confirmed that the regions other than the both edge portions of the PET film were such that the PET films were not in contact with each other by the void layer 3. Next, the wound body 4 of the PET film was placed in a dust-free baking oven (PVHC3 3 0 manufactured by ESPEC Co., Ltd.) which was previously heated to 23 (TC). At this time, the wound body 4 of the PET film was as shown in Fig. 3. It is placed longitudinally and placed on the grid 11. The PET film is heat treated for 30 minutes, then taken out from the oven 1 and air cooled. The PET film was pulled out to confirm whether the PET film was deformed. It was found that even if the PET film was heated to a temperature above the transfer point of the glass, the PET film was not produced on the portion of the PET film that was not in contact with the support member 2. The fixation was not observed, and deformation such as distortion was not observed. Further, as Comparative Example 1, the same PET film as described above was taken up in the core without using the support member 2 (the void layer 3 was not present in -19-201244906). In addition to the above, the other materials were heated at 230 ° C for 30 minutes in the same manner as above. In the thus treated PET film, wrinkles and wrinkles were confirmed. The distortion is more severe and the original shape cannot be maintained. 2 A PEN film (Teonex Q65FA manufactured by Teijin DuPont Film Co., Ltd., thickness 10 〇em, glass transition point: 155 ° C, melting point: 269 ° C) was prepared as the plastic film 1, and the heating temperature of the baking furnace 10 was set. Otherwise, the PEN film was deformed by the same method as that of the above-mentioned Example 1, except that the PEN film was pulled out to confirm whether the PEN film was deformed or not. It was confirmed that the entire PEN film was covered, and the PEN film was not fixed to each other, and no deformation such as distortion was observed. As Comparative Example 2, the support member 2 was not used (the void layer 3 was not interposed) and would be the same as described above. The PEN film was taken up in the core material 5, and the other was heated in the baking oven 10 at 150 ° C for 30 minutes. The PEN film after the heat treatment was confirmed. The folding and twisting were severe, and the PEN film was in a state of being fixed to each other and could not be peeled off. As Comparative Example 3, the tension per unit sectional area when the PEN film was wound up was set to 1.7 N/mm 2 , except Other than the above ,to

-20- S 201244906 The oven 10 was heated at 15 ° C for 30 minutes. In the PEN film which was subjected to the heat treatment, it was confirmed that a linear wrinkle extending in the width direction occurred in the central portion in the width direction of the PEN film. (Example 3) Heating was carried out in the same manner as in Example 1 except that the pattern 6 was formed on the PET film in advance, and it was confirmed whether or not the PET film and the pattern 6 were deformed. The pattern 6 on the PET film was produced in the following manner. That is, the resist material (photosensitive material) was applied by a gravure printing method at a thickness of 1/ζη, and then the resist material was dried at 50 ° C for 2 minutes. Next, a mask having a desired shape is interposed to expose the resist material applied to the PET film to ultraviolet light exposure. Then, development is carried out to form a pattern 6 composed of the pattern. The PET film thus formed with the pattern 6 was subjected to heat treatment in the same manner as in Example 1, and then it was confirmed whether or not the PET film and the pattern 6 were deformed. It was found that even if the PET film was heated above the glass transition point, The temperature 'on the portion of the PET film on which the pattern 6 was formed, no deformation such as wrinkles and distortion was observed. Further, the adhesion between the pattern 6 and the PET film was confirmed to be remarkably improved as compared with that before the heat treatment. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a wound body of a plastic film according to an embodiment of the present invention. -21 - 201244906 Fig. 2(a) is a plan view showing an example of the arrangement of the support members in the embodiment of the present invention, and Fig. 2(b) is a side view of Fig. 2(a), and Fig. 2(c) A plan view showing another example of the arrangement of the support members, and Fig. 2(d) is a side view of Fig. 2(c). Fig. 3 is a view showing an example of a state in which a wound body of a plastic film is placed in a baking oven in the embodiment of the present invention. Fig. 4 is a view showing a winding body of a plastic film in an embodiment of the present invention. A diagram of another example of the state of the oven. Fig. 5 is a flow chart showing a method of heating a plastic film and a method of producing a color filter according to an embodiment of the present invention. [Main component symbol description] 1 : Plastic film 2 : Support member 2a : Recessed portion 3 : Void layer 4 : Winding body 5 : Core material 6 : Pattern 7 : Color filter 1 〇 : Heating furnace 1 1 : Grid 1 2 : holding member 1 3 : bearing member

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Claims (1)

201244906 VII. Application for Patent Park: 1. A method for heating a plastic film, characterized in that it comprises: sandwiching a support member between plastic films and winding a strip-shaped plastic film on the core material to utilize the support member The process of forming a winding body of the plastic film by interposing the gap layer between the plastic films, putting the coiled body of the plastic film into the heating furnace, and heating the plastic film at a desired temperature in the heating furnace The process of taking up the volume. 2. The method for heating a plastic film according to claim 1, wherein in the process of forming the wound body of the plastic film, the plastic film is taken up by a tension per unit sectional area of 1 N/mm 2 or less. 3. The method for heating a plastic film according to claim 1 or 2, wherein the core material is composed of a resin, and in the process of heating the wound body of the plastic film, the plastic film is transferred by the glass of the core material. The temperature below the point is heated. 4. The method for heating a plastic film according to claim 1 or 2, wherein the support member is made of a resin, and in the process of heating the take-up body of the plastic film, the plastic film is a glass of a support member. The temperature below the transfer point is heated. 5. The method of heating a plastic film according to claim 4, wherein the support member is made of a resin having a glass transition point or more above the glass transition point of the plastic film. 6. The method of heating a plastic film according to claim 4, wherein the support member is made of the same material as the plastic film. The method for heating a plastic film according to claim 1 or 2, wherein in the process of forming the wound body of the plastic film, the pattern is formed by being wound on the resin Plastic film of core material. 8. The method of heating a plastic film according to claim 7, wherein in the process of forming the take-up body of the plastic film, the support member is disposed in a region other than the pattern in the plastic film. A method of producing a color filter, comprising: preparing a process for preparing a strip-shaped plastic film, applying a photosensitive material containing a resin for forming a color filter to a plastic film, and drying the photo-sensitive film a process in which a material is exposed and developed in a predetermined shape, and a pattern of the photosensitive material is formed on the plastic film, and a heating method of the plastic film according to claim 7 is applied. The process of heating the plastic film and the pattern to obtain a color filter. -twenty four-