Method for producing a photochromic resin body

Abstract

To provide a method of producing a photochromic resin body, with which a photochromic resin body can easily be produced favorably and various design patterns can be applied, so that reproducibility can be improved.SOLUTION: The method of producing a photochromic resin body comprises: a first step of applying a sublimable photochromic dye having sublimability to a base body to obtain a function-adding base body; a second step of depositing the sublimable photochromic dye on a resin body by setting the function-adding base body obtained in the first step to face the resin body, and then heating the function-adding base body such that the sublimable photochromic dye applied to the function-adding base body sublimates and deposits on the resin body ; and a third step of heating the resin body on which the sublimable photochromic dye has deposited in the second step, such that the sublimable photochromic dye fixes on the resin body.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a photochromic resin body. Method

Background Art

[0002] Conventionally, photochromic resin bodies in which photochromic performance is added to resin bodies have been proposed. For example, as an example of a photochromic resin body, a photochromic lens in which photochromic performance is added to a lens can be mentioned. Conventionally, for example, various methods for manufacturing such a photochromic resin body have been proposed. For example, a method of kneading a photochromic dye into a resin body, a method of immersing a lens in a liquid in which a photochromic dye is dispersed for a predetermined time (dip dyeing method) (for example, Patent Document 1), etc. have been used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the photochromic resin bodies manufactured by conventional methods are only those with a single-color design or a simple design, and are lacking in designability. Also, when adding photochromic performance to a plurality of resin bodies with the same design pattern, it has been difficult to add photochromic performance to the plurality of resin bodies with the same design pattern with good reproducibility.

[0005] In addition, the photochromic resin bodies manufactured by conventional methods need to carry out many processes and complicated operations in order to add the desired photochromic performance, which is time-consuming and laborious.

[0006] ​In view of the above problems, the present disclosure aims to provide a method for manufacturing a photochromic resin body that can easily and favorably manufacture a photochromic resin body, can apply various design patterns, and can improve reproducibility, which is the technical problem to be solved.

Means for Solving the Problems

[0007] In order to solve the above problems, the present invention is characterized by having the following configuration.

[0008] (1) The method for manufacturing a photochromic resin body according to the first aspect of the present disclosure is a method for manufacturing a photochromic resin body, which includes a first step of obtaining a substrate with added functions by applying a sublimable photochromic dye having sublimability to a substrate, a second step of facing the substrate with added functions obtained in the first step to a resin body and heating the substrate with added functions to sublime the sublimable photochromic dye applied to the substrate with added functions and attach the sublimable photochromic dye to the resin body, and a third step of heating the resin body to which the sublimable photochromic dye has been attached in the second step to fix the sublimable photochromic dye to the resin body. Using a printing apparatus, print an ink for functional addition containing the onto a substrate print to obtain a substrate with added functions, a second step of facing the substrate with added functions obtained in the first step to a resin body and heating the substrate with added functions to sublime the sublimable photochromic dye applied to the substrate with added functions and attach the sublimable photochromic dye to the resin body, and a third step of heating the resin body to which the sublimable photochromic dye has been attached in the second step to fix the sublimable photochromic dye to the resin body. , The sublimable photochromic dye a sublimable photochromic dye having a melting point higher than the glass transition temperature of the resin body, which is at least one sublimable photochromic dye selected from the group consisting of spirooxazine-based, naphthopyran-based, spiropyran-based, and fulgide-based dyes is characterized in that 。

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0010] <Manufacturing System for Photochromic Resin Body> Hereinafter, typical embodiments in the present disclosure will be described. For example, FIG. 1 is a flowchart showing the process of the method for manufacturing a photochromic resin body of this embodiment. For example, FIG. 2 is a schematic diagram showing the manufacturing system used in the method for manufacturing a photochromic resin body of this embodiment.

[0011] For example, a photochromic resin body with added photochromic performance is a resin body that has the property that the color tone and color density of the photochromic resin body change upon irradiation of light (for example, ultraviolet light, etc.) to the photochromic resin body. Also, for example, a photochromic resin body has the property that the changed color tone and color density return to their original state by stopping the irradiation of light to the photochromic resin body. As an example, when ultraviolet light is irradiated onto a photochromic resin body, the photochromic resin body becomes colored, and when the irradiation of ultraviolet light is stopped, the color of the photochromic resin body disappears over time.

[0012] Note that hereinafter, the case of manufacturing a photochromic lens by adding photochromic performance to a lens 8, which is one of the resin bodies, using the gas-phase transfer dyeing method will be exemplified and described. Regarding the lens 8, regardless of the refractive power, the technology of the present disclosure can be applied. For example, the technology of the present disclosure can be applied to lenses with various refractive powers (for example, low diopter, high diopter, 0 diopter, etc.). Of course, the technology exemplified below can also be applied when adding photochromic performance to resin bodies other than the lens 8 (for example, goggles, covers of mobile phones, covers for lights, accessories, toys, films (for example, with a thickness of 400 μm or less), plate materials (for example, with a thickness of 400 μm or more), etc., any molded body, etc.) using the gas-phase transfer dyeing method. Of course, as the resin body, it also includes a member to which resin is added to a member (for example, wood, glass, etc.). In this case, photochromic performance may be added to the resin using the gas-phase transfer dyeing method. Also, the substrate 1 for adding functions exemplified below can also be used in a transfer dyeing process other than gas-phase transfer dyeing.

[0013] For example, in the method for manufacturing a photochromic resin body of the present embodiment, a first step, a second step, and a third step are carried out. For example, the method for manufacturing a photochromic resin body of the present embodiment is carried out in the order of the first step, the second step, and the third step. For example, the first step is a step of obtaining a substrate with added functions (for example, the substrate with added functions 1) by applying a sublimable photochromic dye having sublimability to a substrate (for example, the substrate 2). For example, the second step is a step of facing the substrate with added functions obtained in the first step to a resin body (for example, the lens 8) and heating the substrate with added functions to sublime the sublimable photochromic dye applied to the substrate with added functions and attach the sublimable photochromic dye to the resin body. For example, the third step is a step of fixing the sublimable photochromic dye to the resin body by heating the resin body to which the sublimable photochromic dye has been attached in the second step.

[0014] Thus, for example, the method for manufacturing a photochromic resin body in the present embodiment includes a first step of obtaining a substrate with added functions by applying a sublimable photochromic dye having sublimability to a substrate, a second step of facing the substrate with added functions obtained in the first step to a resin body and heating the substrate with added functions to sublime the photochromic dye applied to the substrate with added functions and attach the photochromic dye to the resin body, and a third step of fixing the photochromic dye to the resin body by heating the resin body to which the photochromic dye has been attached in the second step. Thereby, a good photochromic resin body can be easily obtained.

[0015] Also, for example, photochromic performance can be added to the resin body in various design patterns such as delicate designs and gradation designs, and it exhibits particularly excellent effects as a manufacturing method for improving the design property. Also, for example, when manufacturing a photochromic resin body by adding photochromic performance to the resin body in the same design pattern, the reproducibility of the design pattern can be improved.

[0016] For example, when manufacturing a photochromic resin body with photochromic performance added in various design patterns to the resin body, the design pattern appears or disappears based on the presence or absence of light irradiation on the photochromic resin body.

[0017] For example, in the present embodiment, as the sublimable photochromic dye, at least one sublimable photochromic dye selected from spiropyran-based, naphthopyran-based, spirooxazine-based, fulgide-based, diarylethene-based, and azobenzene-based dyes may be used. Of course, the sublimable photochromic dye is not limited to the above dyes, and any sublimable photochromic dye having sublimability and photochromic performance may be used.

[0018] For example, in the technology of the present disclosure, as the more preferable sublimable photochromic dye, at least one sublimable photochromic dye selected from spiropyran-based, naphthopyran-based, spirooxazine-based, and fulgide-based dyes may be used. By using the sublimable photochromic dye as described above, when manufacturing a photochromic resin body by this manufacturing method, a photochromic resin body with higher photochromic performance and more suppressed color unevenness can be manufactured. That is, when manufacturing a photochromic resin body by this manufacturing method, by using the sublimable photochromic dye as described above, a photochromic resin body with particularly high color development and suppressed color unevenness can be manufactured. Further, when manufacturing a photochromic resin body by this manufacturing method, by using the sublimable photochromic dye as described above, a photochromic resin body in which the changed color (developed color) returns in a short time can be manufactured. For example, when using a lens as the resin body, a photochromic lens that does not require a long time for color change is particularly preferable.

[0019] For example, as the sublimable photochromic dye, it is preferable to use a sublimable photochromic dye having a melting point higher than the glass transition temperature of the resin body to which photochromic performance is added (the glass transition temperature varies depending on the material of the resin body). By using such a sublimable photochromic dye, in the third step, when fixing the photochromic performance to the resin body, it is possible to easily suppress the sublimable photochromic dye from dissolving out and causing color unevenness. For example, when using a sublimable photochromic dye having a melting point lower than the glass transition temperature of the resin body, by using a carrier agent or the like, it is possible to fix the sublimable photochromic dye to the resin body at a heating temperature lower than the glass transition temperature of the resin body, so that it is also possible to suppress the sublimable photochromic dye from dissolving out and causing color unevenness.

[0020] For example, as the sublimable photochromic dye, at least one or more sublimable photochromic dyes may be used. In this case, for example, only one sublimable photochromic dye (for example, a sublimable photochromic dye of the spirooxazine type, etc.) may be used. Also, for example, in this case, in addition to the sublimable photochromic dye of the spirooxazine type, at least one or more sublimable photochromic dyes (for example, one sublimable photochromic dye, two sublimable photochromic dyes, three sublimable photochromic dyes, four sublimable photochromic dyes, etc.) may be used.

[0021] For example, when using a plurality of sublimable photochromic dyes for the resin body, the first step may be configured to apply the plurality of sublimable photochromic dyes to the substrate simultaneously. Also, for example, when using a plurality of sublimable photochromic dyes for the resin body, the first step may be configured to apply the plurality of sublimable photochromic dyes to the substrate at different timings.

[0022] For example, as the resin body, at least one of the following may be used as the material: polycarbonate resins (e.g., diethylene glycol bisallyl carbonate polymer (CR-39)), polyurethane resins (Trivex), allyl resins (e.g., allyl diglycol carbonate and its copolymers, diallyl phthalate and its copolymers), fumaric acid resins (e.g., benzyl fumarate copolymer), styrene resins, polymethyl acrylate resins, fiber resins (e.g., cellulose propionate), high refractive index materials such as thiourethane or thioepoxy, nylon resins (polyamide resins), etc.

[0023] In addition, for example, a resin body may be provided with a receptive layer on which a sublimable photochromic dye is likely to be fixed. Of course, for example, the manufacturing method of the present disclosure is applicable also to a resin body that does not have a receptive layer. For example, sublimable photochromic dye is fixed to the resin body provided with the receptive layer. For example, the receptive layer can stably hold the sublimable photochromic dye. For example, since the receptive layer is provided on the resin body, the sublimable photochromic dye can be held on the resin body in a more stable state than when the sublimable photochromic dye is directly attached to the resin body. In addition, changes in the color tone and color density of the resin body can be better implemented.

[0024] In addition, for example, the receptive layer can be applied (attached) to the resin body by various methods. For example, various methods include at least one of spin coating, spray coating, dip coating, bar coating, flow coating, cap coating, knife coating, die coating, roll coating, gravure coating method, screen printing, brush painting, etc. Of course, a method different from the above methods may be used as the method for providing the receptive layer. For example, the receptive layer may be applied by a coating device equipped with a pen, roller, spray, etc. Also, for example, the receptive layer may be applied to the resin body by a processor using a pen, roller, spray, etc.

[0025] For example, as the receiving layer, at least any one of polyurethane resin, polymethacrylic acid ester resin, nitrocellulose, polyethylene resin, polyester resin, polyether resin, polyurea resin, etc. may be used. Of course, the receiving layer is not limited to the above configuration.

[0026] In addition, for example, in this embodiment, in addition to the sublimable photochromic dye, a sublimable dye for adjustment to adjust the color of the resin body may be used. For example, as the sublimable dye for adjustment, at least any one of dyes such as yellow, blue, red, etc. may be used. Of course, sublimable dyes of colors different from the above may be used. For example, dyes of mixed colors (such as green, purple, etc.) may be used.

[0027] Also, for example, in addition to the sublimable photochromic dye, a functional dye for adding functions to the resin body may be used. In this case, for example, a photochromic performance may be added to the resin body, and other functions may also be added. For example, as the function to be added, a function of reducing the transmittance of light in a specific wavelength range (for example, the wavelength range in the blue region, etc.) may be added.

[0028] For example, in this embodiment, the manufacturing system 100 is used to perform each step in the method for manufacturing the photochromic resin body. For example, referring to FIG. 2, the schematic configuration of the manufacturing system 100 in this embodiment will be described. The manufacturing system 100 of this embodiment includes a dye coating device 10, a vapor deposition device 30, and a dye fixing device (fixing device) 50.

[0029] For example, in the first step, the dye coating device 10 is used. For example, the dye coating device 10 is used to apply a sublimable photochromic dye, which will be vapor-deposited on a resin body (lens 8 in this embodiment), onto the substrate 2 to obtain a functionalized substrate 1 coated with the sublimable photochromic dye. For example, in the second step, the vapor deposition device 30 is used. For example, the vapor deposition device 30 is used to face the functionalized substrate 1 to the resin body and heat the functionalized substrate, so as to sublime the sublimable photochromic dye coated on the functionalized substrate 1 and attach the sublimable photochromic dye to the resin body. For example, in the third step, the fixing device 50 is used. For example, the fixing device 50 is used to heat the resin body to which the sublimable photochromic dye is attached, so as to fix the sublimable photochromic dye to the resin body.

[0030] Hereinafter, the method for manufacturing the photochromic resin body will be described in detail. Hereinafter, the case of manufacturing a photochromic lens by adding functions to a lens (for example, lens 8), which is one of the resin bodies, using the gas-phase transfer dyeing method will be exemplified and described.

[0031] <First Step> For example, in the first step, the functionalized substrate 1 is obtained (manufactured) by applying a sublimable photochromic dye to the substrate 2 with the dye coating device 10. For example, in the first step, the dye coating device 10 forms the dye portion 6 by attaching a sublimable photochromic dye, which will be vapor-deposited on the lens 8 later, to the substrate 2. For example, the substrate 2 is a medium that temporarily holds a sublimable photochromic dye used to add photochromic performance to the lens 8. A detailed description of the substrate 2 will be given later.

[0032] In this embodiment, for example, a printing device is used as the dye coating device 10. For example, in the first step of this embodiment, the functionalized substrate 1 is obtained by printing a functionalized ink containing a sublimable photochromic dye onto the substrate 2 using the printing device.

[0033] Thus, for example, in the first step, a functional substrate is obtained by printing an ink for functional addition containing a sublimable photochromic dye onto a substrate using a printing device. This makes it easier to accurately control the coating amount of the sublimable photochromic dye and enables the sublimable photochromic dye to be more easily and uniformly applied to the substrate. Also, the photochromic dye can be easily applied in various design patterns. Furthermore, by using a printing device, the amount of sublimable photochromic dye used is reduced. In this embodiment, a step of drying the ink printed by the printing device is performed, so that the sublimable photochromic dye is held more firmly.

[0034] Note that, for example, in this embodiment, the sublimable photochromic dye may be dissolved in the solvent of the ink. For example, this ink for functional addition is put into an ink container for an inkjet printer (e.g., an ink pack, an ink cartridge, etc.), and this ink container is attached to the attachment part 14 of the inkjet printer 11. In this embodiment, the case where an ink cartridge 13 is used as the ink container will be described as an example. For example, the ink for functional addition is put into an ink cartridge 13 for an inkjet printer, and this cartridge 13 is attached to the attachment part 14 of the inkjet printer 11.

[0035] In this embodiment, for example, the case where an inkjet printer 11 is used as the printing device will be described as an example. In this case, for example, a sublimable photochromic dye is applied to the substrate 2 by printing with the inkjet printer 11. In this embodiment, for example, the inkjet printer 11 includes an attachment part 14, an inkjet head 15, and a control means (control unit) 16. Of course, the inkjet printer 11 is not limited to the above configuration.

[0036] For example, the mounting portion 14 mounts an ink container (e.g., the ink cartridge 13 described later) of the functional additive ink containing the sublimable photochromic dye. For example, the inkjet head 15 discharges the functional additive ink toward the substrate 2 from the ink container of the functional additive ink mounted on the mounting portion 14 and the ink container of the dyeing ink. Thereby, the functional additive ink is printed on the substrate 2. For example, the control unit 16 controls the driving of the inkjet head 15 to discharge the functional additive ink from the inkjet head 15.

[0037] For example, in order to print the functional additive ink containing the sublimable photochromic dye for adding photochromic performance on the substrate 2 using this inkjet printer 11, the personal computer 12 (hereinafter referred to as PC) is used to prepare the discharge amount of each functional additive ink to be printed.

[0038] In the present embodiment, the amount of the functional additive ink containing the sublimable photochromic dye is stored in the memory 20 as color data. Further, as color data, the color density of the resin body at the time of adding photochromic performance is stored in the memory 20. For example, by selecting the color data desired by the operator, the color data can be called from the memory 20, and it is possible to reproduce the addition of the same photochromic performance (color by the sublimable photochromic dye) any number of times. Also, for example, since the shade of the color of the sublimable photochromic dye is digitally managed, the same concentration of color can be obtained any number of times when needed. That is, it is possible to reproduce the photochromic performance that changes in the color tone and color density desired by the operator for the resin body.

[0039] For example, the density gradient can be obtained by the gradation function provided in software such as drawing software. Also, for example, a gradation according to preference may be set in advance and stored as unique gradation data (color data) in the PC 12. Note that, for example, various designs (e.g., a gradation pattern having a density gradient, a single-color design, an image, etc.) can be added as desired photochromic performance (color by a desired sublimable photochromic dye).

[0040] Note that the density of the sublimable photochromic dye may also be made changeable. For example, by changing the density of the sublimable photochromic dye, the density of the color added to the resin body can be changed. In this case, for example, the density of the sublimable photochromic dye may be made selectable, and color data when applying the sublimable photochromic dye at the selected density may be selected for each density of the sublimable photochromic dye.

[0041] For example, as the substrate 2 on which the sublimable photochromic dye is printed by a printing device, configurations using paper, a metal plate (e.g., aluminum, iron, copper, etc.), glass, etc. can be cited. In the following description, the substrate 2 will be described by taking paper as an example. Also, in the present embodiment, for example, the substrate 2 is a sheet-like substrate. Further, in the following description, the printing device will be described by taking the inkjet printer 11 as an example. For example, the substrate 2 is placed in the inkjet printer 11, and printing of each ink is performed so as to have the functions, colors, and color densities set in advance by operating the PC 12.

[0042] Note that in the present embodiment, the configuration using the inkjet printer 11 as the printing device in the dye application device 10 has been described as an example, but it is not limited thereto. As the printing device, a configuration may be adopted in which a laser printer is used to apply the sublimable photochromic dye to the substrate 2 by printing. In this case, for example, toner is used and the sublimable photochromic dye is adhered to the substrate 2 by the laser printer.

[0043] In addition, in this embodiment, a configuration in which a sublimable photochromic dye is applied to the substrate 2 using a printing device as the dye adhering portion 10 is taken as an example, but the present invention is not limited thereto. For example, the dye application device 10 may be any configuration as long as it can apply a sublimable photochromic dye to the substrate 2. For example, the dye application device 10 may adhere the ink for function addition to the substrate 1 for function addition by driving a dispenser (liquid metering application device), a roller, or the like. Further, for example, without using the dye application device 10, an operator may apply the ink for function addition to the substrate 1 for function addition using a pen, a roller, a spray, or the like. Note that the sublimable photochromic dye may be applied to the substrate 2 without being made into ink.

[0044] When applying the sublimable photochromic dye to the substrate 2, the sublimable photochromic dye may be applied at least once or more. For example, the sublimable photochromic dye may be applied to the substrate 2 by one application (for example, one printing or the like), or the sublimable photochromic dye may be applied to the substrate 2 by a plurality of applications (for example, multiple printings). That is, the number of times of applying the sublimable photochromic dye to the substrate 2 may be changed depending on the color and concentration.

[0045] <Ink for function addition> For example, the ink for function addition is applied to the substrate 2. For example, the ink for function addition is used to sublime the sublimable photochromic dye applied to the substrate 1 for function addition by heating the substrate 1 for function addition to which the ink for function addition is applied, and to adhere the sublimable photochromic dye to the resin body, thereby adding photochromic performance to the resin body.

[0046] For example, the ink for function addition may contain water, a humectant, and a dispersant.

[0047] For example, the humectant may be at least any one of glycerin, propylene glycol, dipropylene glycol, tripropylene glycol, and sorbitol. For example, by including the humectant, it is possible to suppress the drying of the ink without adversely affecting the performance of the resin body after adding the photochromic performance. Note that the humectant is not limited to the above configuration. For example, as long as the humectant can suppress the drying of the ink, it may be used.

[0048] For example, the dispersant may be any one of an anionic surfactant, a nonionic surfactant, etc. More preferably, it may be an anionic surfactant. For example, by including the dispersant, it is possible to suitably disperse the sublimable photochromic dye and improve the stability of the ink without adversely affecting the performance of the resin body after adding the photochromic performance. Note that the dispersant is not limited to the above configuration. For example, as long as the dispersant atomizes the sublimable photochromic dye and disperses it in an aqueous medium and can exhibit a function of correcting the dispersion stability of the atomized sublimable photochromic dye, it may be used.

[0049] Note that, for example, as the anionic surfactant, it may be at least any one of a formalin condensate of naphthalenesulfonate, ligninsulfonates, a formalin condensate of a special aromatic sulfonate, a formalin condensate of creosote oil sulfonate, a polyoxyethylene alkyl ether sulfate, etc. Also, for example, as the nonionic surfactant, it may be any one of a polyoxyethylene sorbitan fatty acid ester, a polyoxyethylene alkyl ether, a polyoxyethylene alkyl phenyl ether, a polyoxyethylene derivative, an ethylene oxide-propylene oxide block copolymer, etc. More preferably, it may be an ethylene oxide adduct of a linear alcohol having 25 to 150 carbon atoms.

[0050] Incidentally, for example, the ink for function addition may further contain a surfactant for adjusting the surface tension. For example, by containing a surfactant for adjusting the surface tension in the ink for function addition, it becomes easier to apply the ink for function addition. In particular, for example, when applying the ink for function addition using an inkjet printer, if the surface tension of the ink for function addition is strong, the ink for function addition may be difficult to be ejected from the inkjet head of the inkjet printer. For example, by containing a surfactant for adjusting the surface tension in the ink for function addition, it becomes easier to be ejected from the inkjet head of the inkjet printer, it becomes easier to adjust the application amount of the ink for function addition, and the ink for function addition can be applied well.

[0051] Incidentally, for example, the ink for function addition may further contain a viscosity modifier. For example, by containing a viscosity modifier in the ink for function addition, it becomes easier to control the application amount of the ink for function addition. In particular, for example, when applying the ink for function addition using an inkjet printer, if the viscosity of the ink for function addition is high, the ink for function addition may be difficult to be ejected from the inkjet head of the inkjet printer. Also, for example, when applying the ink for function addition using an inkjet printer, if the viscosity of the ink for function addition is low, the ink for function addition may be ejected excessively from the inkjet head of the inkjet printer. For example, by containing a viscosity modifier for adjusting the surface tension in the ink for function addition, it becomes possible to easily adjust the application amount of the ink for function addition ejected from the inkjet head of the inkjet printer, and the ink for function addition can be applied well.

[0052] <Second Step> As described above, the second step is performed using the substrate 1 for functional addition obtained in the first step. For example, in the second step, the substrate 1 for functional addition obtained in the first step is opposed to a resin body (in this embodiment, the lens 8), and by heating the substrate 1 for functional addition, the sublimable photochromic dye applied to the substrate 1 for functional addition is sublimated, and the sublimable photochromic dye is adhered to the lens 8. For example, in the second step, the vapor deposition apparatus 30 is used.

[0053] For example, the vapor deposition apparatus 30 heats the sublimable photochromic dye adhered to the substrate 1 for functional addition by electromagnetic waves, so as to sublimate the sublimable photochromic dye toward the lens 8. As a result, the sublimable photochromic dye is vapor-deposited on the lens 8. Note that various layers such as a receiving film for facilitating the fixing of the sublimable photochromic dye in the third step described later may be formed on the lens 8.

[0054] For example, the vapor deposition apparatus 30 of this embodiment includes an electromagnetic wave generation unit 31, a vapor deposition jig 32, a pump 36, and a valve 37. Of course, the configuration of the vapor deposition apparatus 30 is not limited to the above configuration.

[0055] For example, the electromagnetic wave generation unit 31 generates electromagnetic waves. As an example, in this embodiment, a halogen lamp that generates infrared rays is used as the electromagnetic wave generation unit 31. However, the electromagnetic wave generation unit 31 may be any device that generates electromagnetic waves. Therefore, instead of the halogen lamp, a configuration that generates electromagnetic waves of other wavelengths such as ultraviolet rays and microwaves may be used.

[0056] For example, the vapor deposition apparatus 30 can raise the temperature of the sublimable photochromic dye in a short time by irradiating the functional addition substrate 1 with electromagnetic waves. Further, when sublimating the sublimable photochromic dye on the functional addition substrate 1, it is also conceivable to heat the sublimable photochromic dye by bringing a hot iron plate or the like into contact with the functional addition substrate 1. However, it is difficult to bring the functional addition substrate 1 and the iron plate or the like into uniform contact (for example, without gaps). If the contact state is not uniform, there is a possibility that the sublimable photochromic dye is not uniformly heated and color unevenness or the like occurs. In contrast, the vapor deposition apparatus 30 of the present embodiment can uniformly heat the sublimable photochromic dye by electromagnetic waves from the electromagnetic wave generation unit 31 separated from the functional addition substrate 1.

[0057] For example, the vapor deposition jig 32 holds the functional addition substrate 1 and the lens 8. The vapor deposition jig 32 of the present embodiment includes a lens support portion 33 and a substrate support portion 34. The lens support portion 33 includes a cylindrical base portion and a mounting table disposed inside the base portion. The lens 8 is supported by the mounting table of the lens support portion 33 while being surrounded by the base portion. The substrate support portion 34 is located at the upper end of the cylindrical base portion and supports the functional addition substrate 1 above the lens 8. Although not shown in detail, when the outer peripheral edge portion of the functional addition substrate 1 is placed on the substrate support portion 34, an annular substrate pressing member is placed on the outer peripheral edge portion of the functional addition substrate 1 from above. As a result, the position of the functional addition substrate 1 is fixed. Conventionally, in order to suppress contamination of the vapor deposition apparatus 30, a plate-shaped glass may be further placed on the upper surface of the functional addition substrate 1 held by the substrate support portion 34 to suppress the sublimated sublimable photochromic dye from leaking to the back side of the functional addition substrate 1 and spreading.

[0058] For example, the functional addition substrate 1 is arranged such that the surface to which the sublimable photochromic dye adheres faces the lens 8. In the present embodiment, since the functional addition substrate 1 is supported above the lens 8, the functional addition substrate 1 is placed on the substrate support portion 34 such that the surface to which the sublimable photochromic dye adheres faces downward.

[0059] For example, when the substrate 1 for function addition and the lens 8 are opposed to each other, they may be opposed in a non-contact manner (for example, 2 mm to 30 mm, etc.). In this case, for example, in the second step, the substrate 1 for function addition obtained in the first step is opposed to the lens 8 in a non-contact manner, and by heating the substrate 1 for function addition, the sublimable photochromic dye applied to the substrate 1 for function addition is sublimated, and the sublimable photochromic dye may be attached to the lens 8.

[0060] For example, by opposing in a non-contact manner, it is possible to suppress the heat generated when heating the substrate for function addition to sublimate the sublimable photochromic dye from being conducted to the resin body. Thereby, it is possible to suppress the resin body from being discolored, shrunk, etc. due to heat.

[0061] Further, for example, by opposing in a non-contact manner, a distance is generated between the substrate for function addition and the resin body, so that the sublimable photochromic dye can be sufficiently dispersed and attached to the resin body. Thereby, uneven adhesion of the photochromic dye in the resin body can be further suppressed, and a good photochromic resin body can be manufactured. In particular, when a gradation pattern is applied to the substrate for function addition in the resin body, the gradation pattern can be suitably reproduced on the resin body. Of course, for example, when the substrate 1 for function addition and the lens 8 are opposed to each other, they may be opposed in a contact state.

[0062] For example, the pump 36 discharges the gas inside the vapor deposition apparatus 30 to the outside, and reduces the air pressure inside the vapor deposition apparatus 30. That is, for example, the pump 36 discharges the gas inside the vapor deposition apparatus 30 to the outside, and makes the inside of the vapor deposition apparatus 30 have a predetermined degree of vacuum.

[0063] For example, in the second step, when the lens 8 is placed in the vapor deposition apparatus 30 and the sublimable photochromic dye is deposited, the pump 36 is used to set the inside of the vapor deposition apparatus 30 to a predetermined degree of vacuum for the deposition operation. For example, in this embodiment, the inside of the vapor deposition apparatus 30 is set to a predetermined vacuum state, but it is not limited to this, and it is also possible to perform the deposition operation under normal pressure inside the vapor deposition apparatus 30.

[0064] For example, after the vacuum state, the electromagnetic wave generation unit 31 is used to heat the functional addition substrate 1 from above to sublime the sublimable photochromic dye. For example, if the heating temperature is below 100°C on the functional addition substrate 1, it becomes difficult for the sublimable photochromic dye to sublime from the functional addition substrate 1. Also, for example, if it exceeds 250°C, the sublimable photochromic dye is likely to deteriorate due to high temperature, and the lens 8 is likely to deform due to radiant heat or the sublimable photochromic dye is likely to re-sublime. Therefore, the heating temperature is preferably between 100 and 250°C, but it is better to select the highest possible temperature according to the material of the lens 8 and the sublimable photochromic dye.

[0065] For example, the second step may be a step of performing at least one vapor deposition. In this case, for example, the vapor deposition may be repeated a plurality of times (for example, 2 times, etc.) using a plurality of functional addition substrates 1. Such a method is useful, for example, when the amount of the sublimable photochromic dye to be applied to the resin body is large or when a plurality of types (for example, 5 types, etc.) of sublimable photochromic dyes are used.

[0066] <The third step> For example, when the second step is completed, the third step is performed. Hereinafter, the third step will be described. For example, in the third step, the lens 8 to which the sublimable photochromic dye has adhered in the second step is heated to fix the sublimable photochromic dye.

[0067] For example, the dye fixing device 50 fixes the sublimable photochromic dye to the lens 8 by heating the lens 8 on which the sublimable photochromic dye is vapor-deposited. For example, when the lens 8 is heated, the sublimable photochromic dye is fixed to the lens 8. Thereby, photochromic performance can be added to the lens 8.

[0068] For example, in the present embodiment, an oven is used as the dye fixing device 50. When an oven (particularly, a forced-air type thermostat) is used, since the temperature of the lens 8 gradually rises over a long period of time, a temperature difference is less likely to occur. Therefore, the sublimable photochromic dye is likely to be evenly fixed to the lens 8.

[0069] Note that, for example, when performing the third step, heating may be performed under normal pressure to fix the sublimable photochromic dye. Of course, the third step may be performed under different atmospheric pressures. In this case, for example, by performing the fixing under pressure, the sublimable photochromic dye can be fixed to the lens 8 at a lower heating temperature, and the sublimable photochromic dye can be prevented from dissolving out or re-subliming. For example, after the operator deposits the sublimable photochromic dye on the lens 8 in the vapor deposition device 30, the operator takes out the lens 8 to which the sublimable photochromic dye is attached. For example, the operator puts the lens 8 into the dye fixing device 50 and heats it under normal pressure to fix the sublimable photochromic dye.

[0070] For example, in the present embodiment, the heating temperature is set at a temperature at which the lens 8 does not deform and sufficient color development is possible. For example, the heating temperature may preferably be 110°C or higher and 160°C or lower (110°C to 160°C). In this case, for example, in the third step, the resin body to which the sublimable photochromic dye has been attached in the second step is heated at a temperature of 110°C to 160°C, so that the sublimable photochromic dye can be fixed. For example, by fixing the sublimable photochromic dye at a temperature of 110°C or higher in the third step, the sublimable photochromic dye can more easily diffuse into the resin body (the lens 8 in the present embodiment), and good photochromic performance can be added. Further, for example, after the third step, it is possible to suppress the leakage (color fading) of the photochromic dye from the resin body (the lens 8 in the present embodiment) to which the photochromic performance has been added. Further, for example, by fixing the sublimable photochromic dye at a temperature of 160°C or lower in the third step, it is possible to suppress the resin body from being overheated, and it is possible to make it more difficult for the resin body to deform. Of course, in the present embodiment, the above temperature is given as a temperature at which it is difficult for the resin body to deform, but it is not limited thereto. For example, if the resin body has high heat resistance, even if the fixing is performed at a higher temperature according to the resin body, it is possible to make it more difficult for the resin body to deform.

[0071] As described above, for example, the method for manufacturing a photochromic resin body of the present disclosure includes a first step of obtaining a functional addition substrate by applying a sublimable photochromic dye having sublimability to a substrate, a second step of opposing the functional addition substrate obtained in the first step to a resin body and heating the functional addition substrate to sublime the photochromic dye applied to the functional addition substrate and attach the photochromic dye to the resin body, and a third step of heating the resin body to which the photochromic dye has been attached in the second step to fix the photochromic dye to the resin body. Thereby, a good photochromic resin body can be easily obtained.

[0072] In addition, for example, photochromic performance can be added to the resin body in various design patterns such as delicate designs and gradation designs, and it exhibits particularly excellent effects as a manufacturing method for improving the designability. Also, for example, when adding photochromic performance to the resin body in the same design pattern to manufacture a photochromic resin body, the reproducibility of the design pattern can be improved.

[0073] In addition, for example, a sublimable photochromic dye is applied to the substrate, and the sublimable photochromic dye applied to the substrate is made to adhere to the resin body, so that the sublimable photochromic dye can be used without waste for adding photochromic performance to the resin body. That is, photochromic performance can be added to the resin body with less sublimable photochromic dye.

[0074] Note that in this embodiment, the case where the heating method of the substrate 1 for function addition is performed from above is taken as an example, but it is not limited thereto. For example, in the heating from the side or below of the substrate 1 for function addition, sublimation of the sublimable photochromic dye can be similarly caused.

[0075] It is also possible to change the configuration of the dye fixing device 50. For example, the dye fixing device 50 may heat the lens 8 by scanning a laser on the lens 8. In this case, the dye fixing device 50 can also intentionally create a temperature difference according to the position of the lens 8. For example, when applying a sublimable photochromic dye in a gradation, the dye fixing device 50 may control the laser scanning according to the target gradation. The dye fixing device 50 may control the laser scanning according to the thickness of the lens 8 or the like so that the temperature of each part of the lens 8 becomes a desired temperature. Also, the dye fixing device 50 may heat the lens by directly irradiating the lens 8 with electromagnetic waves.

[0076] In addition, two or more of the processes (e.g., the first process, the second process, the third process, etc.) performed in each of the dye coating device 10, the vapor deposition device 30, and the dye fixing device 50 may be executed by one device. For example, a device that executes both the second process performed by the vapor deposition device 30 and the third process performed by the dye fixing device 50 may be used. In this case, for example, the heating of the substrate 1 for function addition in the second process and the heating of the lens 8 in the third process may be executed by the same heating means (e.g., an infrared heater, etc.). Further, the device may automatically perform a plurality of processes (e.g., from the second process to the third process) in a series of flows.

[0077] Note that, for example, a coating (e.g., a hard coat, an antireflection coat, an antifouling coat, etc.) may be further applied to the photochromic resin body. For example, by applying the coating, a specific function in the photochromic resin body may be improved.

[0078] Note that a receiving layer may be provided. For example, the receiving layer can stably hold the sublimable photochromic dye. For example, since the receiving layer is provided on the lens 8, the sublimable photochromic dye can be held on the lens 8 in a more stable state compared to the case where the sublimable photochromic dye is directly attached to the lens 8. In addition, changes in the color tone and color density of the lens 8 can be more favorably implemented.

[0079] For example, as the receiving layer, at least any one of a polyurethane resin, a polymethacrylate resin, nitrocellulose, a polyethylene resin, etc. may be used. Of course, the receiving layer is not limited to the above configuration.

[0080] For example, the receiving layer can be applied (adhered) to the lens 8 by various methods. Here, the various methods only need to be configured such that the receiving layer adheres to the lens 8. For example, the various methods may be at least any one of spin coating, spray coating, dip coating, bar coating, flow coating, cap coating, knife coating, die coating, roll coating, gravure coating method, screen printing, brush painting, etc. Of course, as a method for providing the receiving layer, a method different from the above methods may be used. For example, the receiving layer may be applied to the lens 8 by a coating device equipped with a pen, a roller, a spray, or the like. Also, for example, the receiving layer may be applied to the lens 8 by a processor using a pen, a roller, a spray, or the like.

[0081] Hereinafter, experimental examples will be shown to specifically describe the present disclosure, but the present disclosure is not limited to the following experimental examples. In the following Experimental Examples 1 to 24, a sublimable photochromic dye was adhered to the surface of a resin body, and the photochromic resin body with the sublimable photochromic dye adhered to the surface was heated to fix the sublimable photochromic dye to the resin body to obtain a photochromic resin body.

[0082] <Experimental Example 1> First, an ink for adding functions used in a printer was prepared. As the sublimable photochromic dye, 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine (manufactured by New Prismatic Enterprise CO., LTD), which is a spirooxazine-based sublimable photochromic dye, was used. For example, a sublimable photochromic dye, pure water, and a dispersant were put into a container and sufficiently stirred to produce an ink for adding functions. For example, Demol MS (Kao Corporation) was used as the dispersant. For example, the composition ratio of the dye, the dispersant, and pure water was 6.0% by weight of the dye, 6.0% by weight of the dispersant, and 88.0% by weight of pure water.

[0083] To disperse the sublimable photochromic dye, after thoroughly stirring the dispersant, place the container filled with the ink for functional addition into the container filled with cooling water, and perform the treatment for a specified time using an ultrasonic homogenizer to obtain the sublimable photochromic dye with a desired particle size. Then, suction filter the ink for functional addition through a filter with an aperture of approximately 1 μm (glass fiber filter paper GF / B) to remove large particles and dust. After that, add pure water to adjust to the specified ink concentration, and if necessary, add a humectant or a surfactant for adjusting the surface tension to prepare the ink for functional addition. Although an ultrasonic homogenizer was used for dispersion this time, a fine particle generator such as a bead mill may also be used. In this way, the ink for functional addition is manufactured.

[0084] In this experimental example, the prepared ink for functional addition was injected into the cyan ink cartridge of an inkjet printer (RJ-1300V2 manufactured by Mutoh Industries). Using the printing control software manufactured by Nisshinbo, the above ink for functional addition was ejected onto a substrate (high-quality PPC paper) with a paper thickness of 100 μm and a black-coated back surface in a circular shape with a diameter of Φ90 mm at the maximum cyan concentration (1024) for printing, thereby applying the sublimable photochromic dye to manufacture a substrate with added functions.

[0085] Using the substrate with added functions obtained in this way, the photochromic performance was added. In a vapor deposition apparatus (TTM-1000 manufactured by Nidec), the substrate with added functions was attached to the dyeing jig, and the vapor deposition operation of the sublimable photochromic dye onto the CR39 lens (S-0.00) was performed. The condition at this time was that the distance between the adhesion surface side of the sublimable photochromic dye on the CR39 lens and the substrate with added functions was 15 mm. After reducing the air pressure in the vapor deposition apparatus to 60 Pa with a pump, the surface temperature of the substrate with added functions was heated to 200 °C using a heating unit (a halogen lamp was used in this experimental example). Note that the temperature near the substrate with added functions was measured with a thermocouple using a temperature sensor (not shown), and the power supply of the halogen lamp was turned off simultaneously when the temperature reached 100 °C to sublime and deposit the sublimable photochromic dye.

[0086] After that, after returning the atmospheric pressure in the vapor deposition apparatus to normal pressure, it was heated in an oven for 2 hours to fix the sublimable photochromic dye. Note that the heating temperature condition of the oven at this time was 135 ° C, and the CR39 lens to which the sublimable photochromic dye was attached was heated to fix the sublimable photochromic dye. In this way, a function was added to the CR39 lens. The following evaluations were performed after the function was added. The results are shown in Table 1.

[0087] [Evaluation of Photochromic Performance (Color Development Property)] Regarding the manufactured photochromic CR39 lens, using a handy UV lamp (LUV-15 365nm 22W, manufactured by AS ONE Corporation), from a height of 50 mm, ultraviolet rays were irradiated toward the photochromic CR39 lens for a certain period of time (in this experimental example, 1 minute), and it was visually confirmed whether the color changed. Also, the irradiation of ultraviolet rays was stopped, and then the color after a certain period of time (in this experimental example, 10 minutes) elapsed was visually confirmed. When irradiated with ultraviolet rays, the color of the lens changed significantly, and the color change returned after the ultraviolet irradiation was stopped: ◎ When irradiated with ultraviolet rays, the color of the lens changed, and the color change returned after the ultraviolet irradiation was stopped: ○ When irradiated with ultraviolet rays, the color of the lens changed significantly or changed, but it was difficult for the color change to return after the ultraviolet irradiation was stopped, and it took time (10 minutes or more) until the color change returned: ○ Although irradiated with ultraviolet rays, the color of the lens did not change: × [Evaluation of Color Non-Uniformity of Lens] Regarding the manufactured photochromic lens, the color non-uniformity of the manufactured photochromic CR39 lens was visually confirmed to check whether there was any color non-uniformity. Also, the color after color development was visually confirmed. Almost no color non-uniformity was observed: ◎ Slight color non-uniformity was observed: ○ Color non-uniformity was observed: ×

[0088] <Experimental Example 2> Except for using a medium refractive index lens instead of a CR39 lens, the addition of photochromic performance was carried out and evaluated in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0089] <Experimental Example 3> Except for using 6'-indolino-1,3,3-trimethyl-spiro[indole-2,3'-[3H]-naphtho[2,1-b][1,4]-oxazine] (manufactured by New Prismatic Enterprise CO., LTD), a sublimable photochromic dye of the spirooxazine type, instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3'-[3H]-naphtho[2,1-b][1,4]-oxazine], a sublimable photochromic dye, the addition of photochromic performance to the CR39 lens was carried out and evaluated in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0090] <Experimental Example 4> Except for using a medium refractive index lens instead of a CR39 lens, the addition of photochromic performance was carried out and evaluated in the same manner as in Experimental Example 3. The above results are shown in Table 1.

[0091] <Experimental Example 5> Except for using 3,3-diphenyl-3H-naphtho[2,1-b]pyran (manufactured by New Prismatic Enterprise CO., LTD), a sublimable photochromic dye of the naphthopyran type, instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3'-[3H]-naphtho[2,1-b][1,4]-oxazine], a sublimable photochromic dye, the addition of photochromic performance to the CR39 lens was carried out and evaluated in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0092] <Experimental Example 6> Except for using a medium refractive index lens instead of a CR39 lens, the addition of photochromic performance was carried out and evaluated in the same manner as in Experimental Example 5. The above results are shown in Table 1.

[0093] <Experimental Example 7> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 3(4-methoxy)phenyl-3H naphtho[2,1-b]pyran (manufactured by New Prismatic Enterprise CO., LTD), a sublimable photochromic dye of the naphthopyran type, was used. Except for this, photochromic performance was added to and evaluated for CR39 lenses in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0094] <Experimental Example 8> Except for using a medium refractive index lens instead of a CR39 lens, photochromic performance was added to and evaluated for the lens in the same manner as in Experimental Example 7. The above results are shown in Table 1.

[0095] <Experimental Example 9> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 6-trifluoromethyl-1,3,3-trimethyl-6’-piperidino-spiro[indole-2,3‘-[3H]-naphtho[2,1-b][1,4]oxazine (manufactured by New Prismatic Enterprise CO., LTD), a sublimable photochromic dye of the spirooxazine type, was used. Except for this, photochromic performance was added to and evaluated for CR39 lenses in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0096] <Experimental Example 10> Except for using a medium refractive index lens instead of a CR39 lens, photochromic performance was added to and evaluated for the lens in the same manner as in Experimental Example 9. The above results are shown in Table 1.

[0097] <Experimental Example 11> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 1,3-dihydro-1,3,3-trimethyl-6’-(1-piperidinyl)-spiro[2H-indole-2,3‘-[3H]-naphtho[2,1-b][1,4]-oxazine (manufactured by Recording Materials Research Institute), a spirooxazine-based sublimable photochromic dye, was used. Except for this, photochromic performance was added to and evaluated for the CR39 lens in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0098] <Experimental Example 12> Except for using a medium refractive index lens instead of the CR39 lens, photochromic performance was added to and evaluated in the same manner as in Experimental Example 11. The above results are shown in Table 1.

[0099] <Experimental Example 13> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 2,2-diphenyl-2H-naphtho(2,1-b)pyran (manufactured by Recording Materials Research Institute), a naphthopyran-based sublimable photochromic dye, was used. Except for this, photochromic performance was added to and evaluated for the CR39 lens in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0100] <Experimental Example 14> Except for using a medium refractive index lens instead of the CR39 lens, photochromic performance was added to and evaluated in the same manner as in Experimental Example 13. The above results are shown in Table 1.

[0101] <Experimental Example 15> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 1,3,3-trimethylindolino-6’-nitrobenzopyrilospiraphene (manufactured by Tokyo Chemical Industry Co., Ltd.), a spiro pyran-based sublimable photochromic dye, was used. Except for this, photochromic performance was added to and evaluated for CR39 lenses in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0102] <Experimental Example 16> Instead of CR39 lenses, except for using mid-refractive index lenses, photochromic performance was added to and evaluated for them in the same manner as in Experimental Example 15. The above results are shown in Table 1.

[0103] <Experimental Example 17> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, (E)-3-(adamantan-2-ylidene)-4-[1-(2,5-dimethyl-3-norbornylidene)]dihydro-2,5-furandione (manufactured by Tokyo Chemical Industry Co., Ltd.), a fulgide-based sublimable photochromic dye, was used. Except for this, photochromic performance was added to and evaluated for CR39 lenses in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0104] <Experimental Example 18> Instead of CR39 lenses, except for using mid-refractive index lenses, photochromic performance was added to and evaluated for them in the same manner as in Experimental Example 17. The above results are shown in Table 1.

[0105] <Experimental Example 19> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3'-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 4,4'-bis(hexyloxy)-3-methylazobenzene (manufactured by Tokyo Chemical Industry Co., Ltd.), an azobenzene-based sublimable photochromic dye, was used. Otherwise, the same procedure as in Experimental Example 1 was followed to add photochromic performance to the CR39 lens and evaluate it. The above results are shown in Table 1.

[0106] <Experimental Example 20> Except for using a medium refractive index lens instead of the CR39 lens, the same procedure as in Experimental Example 19 was followed to add photochromic performance and evaluate it. The above results are shown in Table 1.

[0107] <Experimental Example 21> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3'-[3H]-naphtho[2,1-b][1,4]-oxazine, a sublimable photochromic dye, 4,4'-bis(decyloxy)-3-methylazobenzene (manufactured by Tokyo Chemical Industry Co., Ltd.), an azobenzene-based sublimable photochromic dye, was used. Otherwise, the same procedure as in Experimental Example 1 was followed to add photochromic performance to the CR39 lens and evaluate it. The above results are shown in Table 1.

[0108] <Experimental Example 22> Except for using a medium refractive index lens instead of the CR39 lens, the same procedure as in Experimental Example 21 was followed to add photochromic performance and evaluate it. The above results are shown in Table 1.

[0109] <Experimental Example 23> Instead of 1,3,3-trimethyl-spiro[benzo[e]indole-2,3’-[3H]-naphtho[2,1-b][1,4]-oxazine], which is a sublimable photochromic dye, 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)-3,3,4,4,5,5,-hexafluoro-1-cyclopentene (manufactured by Tokyo Chemical Industry Co., Ltd.), which is a diarylethene-based sublimable photochromic dye, was used. Except for this, photochromic performance was added to and evaluated for CR39 lenses in the same manner as in Experimental Example 1. The above results are shown in Table 1.

[0110] <Experimental Example 24> Except for using a medium refractive index lens instead of a CR39 lens, photochromic performance was added to and evaluated for the lens in the same manner as in Experimental Example 23. The above results are shown in Table 1.

[0111]

Table 1

[0112] Further, according to Experimental Examples 1 to 18, when a photochromic resin body was manufactured by this manufacturing method using at least one sublimable photochromic dye selected from spirooxazine-based, naphthopyran-based, spiropyran-based, and fulgide-based sublimable photochromic dyes as the sublimable photochromic dye, it was confirmed that a photochromic resin body having higher photochromic performance and more suppressed color unevenness can be manufactured. Also, the changed color returned without having a long time until the changed color returned. In particular, when applying photochromic performance to a lens, a photochromic lens that does not require a long time for color change is more preferable.

Description of Symbols

[0113] 1 Substrate for Function Addition 2 Substrate 8 Lens 10 Dye Coating Device 11 Inkjet Printer 12 Personal Computer 13 Ink Cartridge 14 Mounting Port 15 Inkjet Head 16 Control Unit 20 Memory 30 Evaporation Device 50 Dye Fixing Device 100 Manufacturing System

Claims

1. A method for manufacturing a photochromic resin body, comprising: a first step of obtaining a functionalized substrate by printing an ink for functionalization containing a sublimable photochromic dye having sublimability onto a substrate using a printing device; a second step of opposing the functionalized substrate obtained in the first step to a resin body and heating the functionalized substrate to sublime the sublimable photochromic dye applied to the functionalized substrate and attach the sublimable photochromic dye to the resin body; a third step of heating the resin body to which the sublimable photochromic dye has been attached in the second step to fix the sublimable photochromic dye to the resin body; characterized by comprising: The sublimable photochromic dye is a sublimable photochromic dye having a melting point higher than the glass transition temperature of the resin body, and is at least one of a spiropyran-based, naphthopyran-based, spirooxazine-based, and fulgide-based sublimable photochromic dye. A method for manufacturing a photochromic resin body.

2. In the method for manufacturing a photochromic resin body according to Claim 1, in the second step, the functionalized substrate obtained in the first step is opposed to the resin body in a non-contact manner, and the functionalized substrate is heated to sublime the sublimable photochromic dye applied to the functionalized substrate and attach the sublimable photochromic dye to the resin body. A method for manufacturing a photochromic resin body.

3. In the method for manufacturing a photochromic resin body according to Claim 1 or 2, in the first step, the sublimable photochromic dye is applied onto the substrate so that the color density changes; in the second step, the sublimable photochromic dye applied to the functionalized substrate is sublimed by heating the functionalized substrate, and the sublimable photochromic dye is attached to the resin body in a state having a concentration gradient; in the third step, the photochromic dye is fixed to the resin body by heating the resin body to which the sublimable photochromic dye has been attached in a state having a concentration gradient in the second step, and a gradation design by the photochromic dye is formed on the resin body. A method for manufacturing a photochromic resin body.

4. In the method for producing a photochromic resin body according to any one of claims 1 to 3, A method for producing a photochromic resin body, characterized in that the resin body is a lens.

Images