JP2006264109A - Method for producing plastic lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a plastic lens which is colored with a pigment by an ink-jet method. <P>SOLUTION: A plastic lens manufacturing method is provided, including a film sticking process for sticking a composition for forming films 32-34 which are demolded integrally with a lens substrate 35 on the side of the molding surface 51 of a mold 50 for molding the lens, a coloring process for sticking the pigment 40 by an ink-jet method after or during the film sticking process, a polymerization process in which the mold 50 is joined, and a composition forming the lens substrate 35 is injected and heat-cured, and a process for demolding the lens from the mold 50. Since the pigment 40 can be applied in the mold, a plastic lens colored with a commercial pigment ink can be produced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to dyeing of plastic lenses used for eyeglasses and the like.

  Plastic lenses are preferred and popular in terms of fashionability and light-shielding properties because they have the characteristics that they are harder to break than inorganic lenses (glass lenses) and can be dyed. Conventionally, a plastic lens is generally colored by the following method. First, there is a method in which the lens fabric is directly dyed by immersing the lens fabric in a dyeing solution in which the dye is dispersed or dissolved. Further, as a different dyeing method, a hard coating treatment is performed on the plastic lens fabric, and the plastic lens on which the hard coat film is formed is immersed in a dyeing solution to mainly dye the hard coat film.

In recent years, in color lenses, it is not only to add color, but also to obtain uniformity in tone and density, to add gradation (gradation), or to add color to paper other than the lens. There are similar requests. In Patent Document 1, as a method of coloring a lens with gradation, a coloring agent containing a color developing agent is discharged onto the surface of the optical lens by a discharge mechanism when the optical lens is held and colored. It is described that it is colored.
JP 2000-111701 A

  In Patent Document 1, as a colorant discharge unit, an ink discharge mechanism in an ink jet printer, for example, a configuration similar to a bubble type ink discharge mechanism or a piezo type ink discharge mechanism can be used. However, the colorant contains a color developing agent, and the color developing agent can dissolve or disperse at least the dye or pigment uniformly, and at the same time has a function of adhering the dye or pigment to the lens surface. In addition, a function similar to that of a hard coat is also required. Therefore, in the technique described in Patent Document 1, the liquid that is actually ejected onto the surface of the optical lens is completely different from the liquid that is ejected toward the paper in the inkjet printer, and is a reliable and commercially available printer. The lens cannot be colored by using a high discharge mechanism or other proven discharge mechanism as it is. For this reason, as a technique that can be actually or mass-produced, it has not been possible to color various colors in various manners on the lens surface in the same manner as paper.

  In particular, when a user uses a spectacle lens, the spectacle lens is directly exposed to sunlight, so light resistance is necessary even in a dye spectacle lens (color lens), and the use of a colorant containing a pigment is necessary. Is required. In recent years, printers capable of performing printing using pigment ink have appeared, and it is considered that a colorant containing a pigment can be used in a color lens. However, in reality, since a technique for actually applying the ink jet method has not been established, a color lens using a pigment-based colorant has not been commercialized.

  Accordingly, an object of the present invention is to provide a manufacturing technique that can actually color a lens by an inkjet method. In particular, it is an object of the present invention to provide a manufacturing method capable of manufacturing a color lens by using an ejection mechanism used in a printer as it is or almost as it is. Furthermore, it aims at providing the manufacturing method which can manufacture the color lens using a pigment-type colorant with high light resistance.

  In the present invention, a composition for forming a film that is integrally released with a lens base material is attached to the molding surface side of a mold for molding a lens having a molding surface for molding a plastic lens surface. A composition for forming a lens substrate by combining a film attaching step, a coloring step for attaching a colorant containing a pigment to the molding surface side of the mold by an inkjet method after the film attaching step, and a pair of mold dies. Provided is a method for producing a plastic lens, which includes a polymerization step of injecting and curing, and a release step of releasing a film and a lens substrate integrally from a mold.

  Such a film that is released from the lens substrate integrally provides the respective functions such as protecting the lens surface and improving scratch resistance, and improving the optical characteristics (antireflection, etc.) of the lens. It can also be called a functional film.

  In addition, after a hard coat film or the like is attached to the molding surface side of the mold for molding the lens, the mold is assembled, and the composition (raw material) of the lens substrate such as a thermosetting monomer is used. The method of injecting and curing is also called an in-mold method. By placing a pair of mold dies facing each other with the molding surface inside, winding a pressure-sensitive adhesive tape around the entire circumference of the mold dies to form a cavity, and injecting a composition that forms a lens substrate into the cavity A plastic lens having a lens surface defined by the molding surface can be manufactured.

  In the production method of the present invention, in this in-mold method, the colorant is attached to the side of the molding surface on which the film is formed, that is, the lens base material side of the film when combined by an inkjet method. Further, the colorant applied to the lens base material side of the film is in a state of being sandwiched between the film or lens base material applied to the lens base material side of the film. Held by the substrate.

  Therefore, in the manufacturing method of the present invention, it is not required that the colorant ejected by the ink jet method includes a color developing agent having a function of attaching a dye or a pigment to the lens surface. In this case, even if the colorant has the same component as the ink ejected onto the paper, it can be used to color the lens.

  Further, in the polymerization process for curing the lens substrate, other films are also cured at the same time. Therefore, the colorant sandwiched between the film and the film or between the film and the lens substrate can be dye-based or pigment-based. However, it is possible to manufacture a lens that is securely held integrally with the lens and colored in a desired color or pattern. Moreover, the dyeing annealing process only for hardening a coloring agent after apply | coating a coloring agent by an inkjet system can also be skipped.

  Further, the operation of coloring the lens can be performed while holding the mold. For this reason, the state of the surface of the film to be coated with the colorant can be selected mainly by attaching a colorant such as a dye or pigment, and does not have to be a condition whether or not it is suitable for handling. . Therefore, if it is desired that the film to be colored is uncured, the film can be dyed as it is applied. If a semi-cured state is desired, heat can be applied after application. It can be semi-cured. Furthermore, if the cured state is preferred, the colorant can be applied after being applied and completely cured. In particular, according to the production method of the present invention, the dyed film (functional film or lens base material) can be applied in a state where the film to be dyed is semi-cured and has a certain degree of viscosity. The lens can be surely colored using.

  Therefore, in the manufacturing method of the present invention, it is possible to actually manufacture a color lens by using an ink jet technique whose reliability has been established for other uses such as a printer. In addition, since a desired color can be applied regardless of the material of the film or the material of the lens, it is possible to color the plastic lenses of various lens substrates with high accuracy. One of the plastic base materials said to be difficult to dye is a transparent resin obtained by polymerizing (thio) epoxy compounds having one or more disulfide bonds in the molecule, and has a high refractive index of 1.72 or more. However, the manufacturing method of the present invention makes it possible to reliably color any color or pattern expressed in gradation. The composition of the lens substrate is not limited to this, and if necessary, modifiers such as (thio) epoxy compounds, thiol compounds, mercapto organic acids, tertiary amines, phosphines, Lewis acids, radical polymerization catalysts, cations It may contain a polymerizable composition containing a curing catalyst such as a polymerization catalyst. Furthermore, the hardly dyeable plastic lens that can be colored by the production method of the present invention is not limited to the above. For example, diethylene glycol bisallyl carbonate (CR-39), (meth) acrylic acid ester, polycarbonate, polystyrene, polyurethane, polythiourethane and the like can be mentioned.

  The manufacturing method of the colored plastic lens of the present invention includes spectacle lenses, contact lenses, dimming lenses, sunglasses, camera lenses, telescope lenses, magnifying lenses, projector lenses, pickup lenses, various optical lenses such as micro lenses, and others. The present invention can also be applied to an optical element such as a prism.

  In the production method of the present invention, a mold made of glass, metal or plastic can be used. In particular, when manufacturing a lens for spectacles, since there are a wide variety of plastic lenses with a degree, a glass mold that can easily mold individual lens curves is suitable. In particular, in the polymerization step, a transparent mold such as glass is preferable when photopolymerization is performed using UV (ultraviolet rays) or the like.

  It is preferable to previously form a release layer on the molding surface of the inner surface of the mold. This is to improve the releasability between the plastic lens provided with the functional film and the mold.

  In the in-mold method, a representative film that is released from the lens base material is a hard coat film, and includes not only this film but also an antireflection film or a primer film. Therefore, in the manufacturing method having a plurality of film attachment steps for forming a plurality of films, the coloring step can be performed after the last film attachment step or between any of the film attachment steps. In the production method of the present invention, if a colorant is held between the film and the film or between the film and the lens substrate, a desired color or pattern can be applied to the lens. A colorant may be applied between the substrate and the uppermost film. Accordingly, the timing of coloring can be set flexibly in consideration of the conditions of the manufacturing process, matching between the film and the colorant, for example, a pigment-based paint.

  The most important film (functional film) formed on the surface of the plastic lens is a hard coat film. In the present invention, the lens can be colored by an inkjet method using the hard coat film as a film carrying a colorant including a pigment.

  Furthermore, in order to improve the performance of the plastic lens, a plurality of films (functional films) are provided. As multiple films (functional films), in addition to the hard coat film, the hard coat film and the lens base material, or the primer film for adhering the anti-reflection film and the lens base material, the anti-reflection to ensure the light transmission There is a membrane. Therefore, a plurality of film adhesion steps included in the present invention include a hard coat film adhesion step for depositing a composition for forming a hard coat film, and a composition for forming an antireflection film before the hard coat film adhesion step. It includes at least two steps of an antireflection film attaching step for attaching an object and a primer film attaching step for attaching a composition for forming a primer film after the hard coat film attaching step.

  The antireflection film can be formed by applying an organic composition to the lens molding surface side of the mold. Accordingly, the film formation process of the antireflection film by the conventional vacuum vapor deposition method can be omitted and it can be formed in a lump using a mold, which is advantageous in terms of manufacturing cost and manufacturing lead time. A hard coat film can be produced by the production method of the present invention, and an antireflection film can be formed by vapor deposition, and is included in the present invention.

  The composition for antireflection film, the composition for hard coat film, and the composition for primer film used in the production method of the present invention are suitable for the in-mold method and can exhibit functions as respective films. If it is good. Examples of a method for applying each film on the lens molding surface side of the mold include spin coating, ink jet, and spray coating. A dipping method can also be employed, but cleaning may be required because the composition adheres to the non-use surface and outer peripheral side surface of the mold. Further, the composition adhering to an unnecessary part of the mold may cause a decrease in sealing property when assembled, and the composition of the lens base material (liquid curable compound) may leak out.

  In the production method of the present invention, in the coloring step, a colorant containing a pigment can be attached. In other words, printers that can print using pigment ink are commercially available, but it is possible to produce a color lens with a colorant containing a pigment using the technology as it is, and to provide a color lens with high light resistance. . Also, any color can be colored on the spectacle lens by using the head used in the printer. Gradient dyeing, twin dyeing in which the color sequentially changes from the color on one side to the color on the other side, and the like are also facilitated. It is possible to construct a database relating to color tone in a computer and to manufacture a spectacle lens having a desired density and color tone based on the database.

  Unlike pigments, pigments do not dissolve in water. Therefore, when using pigments as aqueous colorants, a dispersant such as a resin is adsorbed on the surface of the pigment and dispersed as pigment particles in an aqueous medium. Will be used. The pigment is dispersed in an aqueous medium to prepare a pigment dispersion, which is adhered to each film. As this aqueous medium, water is mainly used. However, an organic solvent, a viscosity adjusting agent, a pH adjusting agent, a surfactant, and the like can be blended to prepare a coating property.

  In the dipping method, a multicolor dyeing tank is required to cope with various color variations, so that a large installation area, power energy, and complicated management are required. On the other hand, in the manufacturing method of the present invention, by using the inkjet method in the coloring process and managing the color tone by computer, various color variations are provided in the space of one printer by using the printer technology. Eyeglass lenses can be manufactured.

  The ink jet system that can be used in the present invention is a method in which a pressure chamber provided with a fine nozzle opening having a diameter of 10 to 100 μm and a pressure generating element is filled with ink, and the pressure generating element is electronically controlled to control the pressure chamber. The ink is pressurized, and the ink is ejected as fine droplets from the nozzle opening with that pressure. Depending on the type of pressure generating element, there are various methods such as a piezo system using a piezoelectric vibrator with a piezo element, a bubble jet (registered trademark) system that uses heat to generate bubbles by heating ink and using the pressure. There are methods. Any method can be used in the present invention.

  In the case of applying a pigment by an inkjet method, in order to suppress clogging due to drying and thickening by a fine nozzle, for example, the solid content of the pigment is 1 to 30% by weight, and the moisture is 0.5 to 90% by weight. It is preferable to be in the range. Moreover, a high boiling water-soluble organic solvent having a boiling point of 200 ° C. or higher can be blended as a liquid wetting agent for preventing clogging. Examples of water-soluble organic solvents include nitrogen-containing divalent to pentavalent alcohols having 2 to 10 carbon atoms such as ethylene glycol, triethylene glycol, and glycerin, formamides, imidazolidinones, pyrrolidone, and aminos. One kind of a hydrocarbon solvent or a sulfur-containing hydrocarbon solvent can be added alone or in admixture of two or more kinds.

  Several examples of the present invention will be described below.

Example 1
FIG. 1 is a flowchart showing a process of manufacturing a colored plastic lens L1 using an in-mold method by the manufacturing method of the present invention. Further, FIG. 2 is a cross-sectional view showing the configuration of the lens L1 on the way to be manufactured by the in-mold method, including the mold 50. The pair of mold dies 50 are arranged to face each other with the molding surface for molding the lens surface as the inner side (inner surface), and an adhesive tape 52 is wound around the entire side surface of the pair of mold dies 50 to form a cavity. A plastic lens can be formed by injecting a composition for forming the lens substrate 35 into the lens. Therefore, the lens molding surface 51 side (lens molding surface side) of the mold 50 is the lens base 35 side of the mold 50.

(Application of release agent)
First, in Step 11, a release agent 58 made of a cationic surfactant was applied to each inner surface (molding surface) 51 of two glass mold dies 50 that had been cleaned in advance by a spin coating method. In this example and the following examples, the mold release agent 58 was obtained by diluting Coatamine 60W (cetyltrimethylammonium chloride aqueous solution) manufactured by Kao Corporation to 1000 ppm with an IPA (isopropyl alcohol) solvent.

  The mold 50 for manufacturing the plastic lens is composed of a combination of an upper mold and a lower mold, and hereinafter, these are shown as the mold 50 including them.

(Formation of antireflection film)
Next, in step 12, the antireflection film composition (AR coating solution) is applied by spin coating to the molding surface 51 of each glass mold 50 to which the release agent 58 is applied, An antireflection film 32 having a thickness of about 100 nm was formed.

  The “formation” of the antireflection film 32 in this step means a state in which the composition for antireflection film is applied and adhered to the lens molding surface side of the mold 50, and the treatment is performed until the composition is completely cured. Does not mean that. The same applies to the following embodiments. That is, in the manufacturing method of the present invention, since the lens base material is formed after the film is attached to the inner surface of the mold 50, the mold 50 with the film attached can be handled as a workpiece. It is possible to proceed to the next step before the film is fully cured. Therefore, in this step, the process can proceed to the next step in a state where the composition for antireflection film is applied to the inner surface of the mold 50 or is semi-cured by applying heat for a short time.

(Hard coat film formation)
Next, in step 13, a silicon-based (silane organic compound) hard coat film composition (HC coating solution) is spin-coated on the molding surface 51 of each mold 50 on which the antireflection film 32 is formed. The hard coat film 33 having a film thickness of about 2 μm was formed by application. The “formation” of the hard coat film 33 in this step has the same meaning as the “formation” of the film in step 12. The same applies to the following embodiments.

The composition for hard coat film (HC coating solution) was prepared as follows. The same applies to the following embodiments. First, 68 g of butyl cellosolve, 139 g of methanol, and 61 g of γ-glycidoxypropyltrimethoxysilane were mixed. To this mixed solution, 17 g of a 0.1N hydrochloric acid aqueous solution was added dropwise with stirring. After further stirring for 3 hours, the mixture was aged overnight. In this solution, 181 g of methanol-dispersed SiO ₂ fine particle sol (manufactured by Catalyst Kasei Kogyo Co., Ltd., trade name “Oscar 1132” solid concentration 30%), diglycerol polyglycidyl ether (manufactured by Nagase ChemteX Corporation), trade name “Denacol” EX-421 ") 26 g, magnesium perchlorate 3 g, silicone surfactant (made by Nippon Unicar Co., Ltd., trade name" L-7001 ") 0.15 g, silicone surfactant (made by Nippon Unicar Co., Ltd.) , Trade name “L-7604”) 0.05 g, phenolic antioxidant (manufactured by Kawaguchi Chemical Co., Ltd., trade name “ANTAGE CRYSTAL”) 0.6 g, benzotriazole UV absorber (Ciba Specialty Chemicals ( Co., Ltd., trade name “TINUVIN213”) 3.7 g was added, stirred for 4 hours, and then aged overnight to HC coating solution It was.

(Formation of primer film)
Next, in step 14, the polyurethane primer film composition (PL coating solution) is spin-coated on the molding surface 51 of each glass mold 50 on which the antireflection film 32 and the hard coat film 33 are formed. The primer film 34 having a film thickness of about 1 μm was formed by application. “Formation” of the primer film 34 in this step has the same meaning as “formation” of the film in step 12. The same applies to the following embodiments.

  The composition for primer film (PL coating liquid) was prepared as follows. The same applies to the following embodiments. First, 126 g of commercially available aqueous emulsion polyurethane “Neo Sticker 700” (manufactured by Nikka Chemical Co., Ltd., solid content concentration 37%, acrylic-modified polyurethane), 258 g of methanol, 74 g of water, and 37 g of butyl cellosolve are mixed. Furthermore, 5 g of γ-glycidoxypropyltrimethoxysilane and 0.1 g of a silicone surfactant (manufactured by Nippon Unicar Co., Ltd., trade name “L-7604”) were added and stirred for 3 hours.

(Application of pigment dispersion)
Next, in step 20, the pigment ink of the printer is commercially available for the molding surface 51 of each glass mold 50 on which the antireflection film 32, the hard coat film 33, and the primer film 34 are formed. The pigment dispersion (colorant) in which the pigment 40 was dispersed was applied using an inkjet head of a commercially available printer and dried naturally.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 2, the pigment dispersion liquid in which the antireflection film 32, the hard coat film 33, and the primer film 34 are formed on the respective molding surfaces 51 and the pigment 40 is dispersed. The two mold dies 50 coated with the above are positioned so that a predetermined interval is opened between the molding surfaces 51, and the periphery of the side surfaces is fixed with a tape 52 made of a plastic film to form the lens substrate 35. A mold (cavity) was assembled.

(Polymerization process)
A thiourethane-based lens monomer (resin solution) is injected into the mold assembled by the mold 50, heated from 30 ° C to 120 ° C over 12 hours, and kept constant at 120 ° C for 2 hours to polymerize. After completion, the lens substrate 35 was thermally cured to produce a plastic lens. Due to the heat applied in this polymerization step, the antireflection film 32, the hard coat film 33, and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured to have a desired hardness or performance. Further, a lens L1 that is colored with the pigment 40 is manufactured.

(Release process)
After slow cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L1 are released. Thereby, the plastic lens L1 provided with the primer film 34, the hard coat film 33, and the antireflection film 32 on the both sides from the plastic lens substrate 35 side is integrally released, and the colored lens L1 colored with the pigment 40 is formed. manufactured. The appearance of the lens L1 was good with no color unevenness.

(Light resistance test)
The colored plastic lens L1 obtained through Steps 11 to 17 described above was exposed for 200 hours with a xenon lamp type fade meter, and a light resistance test for long-term use was performed.

  Color loss (light resistance) of the lens after exposure is “A” when the Y value difference (ΔY value) of the CIE colorimetric method is less than 5, “B” when it is 5 or more and less than 10, “10” or more Was evaluated as “C”, “A” as non-defective, and “B” and “C” as defective. The same applies to the following embodiments. The light resistance evaluation of the colored plastic lens L1 of this example was “A”.

(Example 2)
FIG. 3 is a flowchart showing a process of manufacturing the colored plastic lens L2 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 4 is a cross-sectional view showing the configuration of the lens L2 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in Step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of the two glass mold dies 50 that had been cleaned in advance in the same manner as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Hard coat film formation)
Next, in Step 13, a hard coat film 33 having a thickness of about 2 μm was formed on the molding surface 51 of each mold 50 on which the antireflection film 32 was formed by the same method as in Example 1.

(Application of pigment dispersion)
Next, in step 20, a pigment dispersion in which the pigment 40 is dispersed is applied to the molding surface 51 of each glass mold 50 on which the antireflection film 32 and the hard coat film 33 are formed. Dried. In this example, a pigment dispersion (colorant) in which the pigment 40 was dispersed was applied by the same method as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the hard coat film 33.

(Formation of primer film)
Next, in step 14, the antireflection film 32 and the hard coat film 33 are formed, and the pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surface 51 of each mold 50 with a film thickness of about 1 μm. A primer film 34 was formed. In this example, instead of applying directly to the inner surface of the hard coat film 33, after applying the pigment dispersion in which the pigment 40 is dispersed, the primer film composition (PL coating liquid) is applied. A primer film 34 was formed in the same manner as in Example 1.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 4, an antireflection film 32 and a hard coat film 33 are formed on each molding surface 51, and a pigment dispersion liquid in which the pigment 40 is dispersed is applied. The two mold dies 50 on which the film 34 was formed were positioned at predetermined intervals in the same manner as in Example 1, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of a plastic film. This mold is the same as the mold of Example 1 except that the pigment 40 is applied between the hard coat film 33 and the primer film 34.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50 and heated from 30 ° C. to 120 ° C. over 12 hours and kept constant at 120 ° C. for 2 hours. Then, the polymerization was completed, and the lens substrate 35 was thermoset to produce a plastic lens. Also in this embodiment, the antireflection film 32, the hard coat film 33, and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step. A lens L2 provided with each film having a desired hardness or performance and colored with the pigment 40 is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L2 are released. As a result, the lens L2 having the primer film 34, the hard coat film 33, and the antireflection film 32 is integrally released from both sides of the plastic lens substrate 35, and a colored lens L2 colored with the pigment 40 is manufactured. It was done. The appearance of the lens L2 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L2 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L2 of this example was “A”.

(Example 3)
FIG. 5 is a flowchart showing a process of manufacturing the colored plastic lens L3 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 6 shows a cross-sectional view of the configuration of the lens L3 being manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surface 51 of each glass mold 50 on which the antireflection film 32 is formed, and is naturally dried. In this example, a pigment dispersion in which the pigment 40 is dispersed is applied in the same manner as in Example 1 except that the coating is applied not on the inner surface of the primer film 34 but on the inner surface of the antireflection film 32.

(Hard coat film formation)
Next, a film thickness of about 2 μm is formed on the molding surface 51 of each mold 50 on which the antireflection film 32 is formed and the pigment dispersion in which the pigment 40 is dispersed is applied in the same manner as in the first embodiment. A hard coat film 33 was formed. In this example, it is the same as in Example 1 except that the composition for hard coat film is applied after applying the pigment dispersion in which the pigment 40 is dispersed, instead of directly applying to the inner surface of the antireflection film 32. The hard coat film 33 was formed by this method.

(Formation of primer film)
Next, in step 14, the antireflection film 32 is formed, the pigment dispersion liquid in which the pigment 40 is dispersed is applied, and the hard coat film 33 is further formed. The molding surface 51 of each glass mold 50 is formed. On the other hand, a primer film 34 having a film thickness of about 1 μm was formed by the same method as in Example 1.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 6, an antireflection film 32 is formed on each molding surface 51, a pigment dispersion liquid in which the pigment 40 is dispersed is applied, and the hard coat film 33 and primer film 34 are further applied. In the same manner as in Example 1, the two mold dies 50 formed with the above were positioned at a predetermined interval, and the periphery of the side surfaces was fixed with a plastic film tape 52 to assemble the mold. This mold is the same as the mold of Example 1 except that the pigment 40 is applied between the antireflection film 32 and the hard coat film 33.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50 and heated from 30 ° C. to 120 ° C. over 12 hours and kept constant at 120 ° C. for 2 hours. Then, the polymerization was completed, and the lens substrate 35 was thermoset to produce a plastic lens. Also in this embodiment, the antireflection film 32, the hard coat film 33, and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step. A plastic lens L3 that is provided with each film having a desired hardness or performance and colored with the pigment 40 is manufactured.

(Release process)
After slow cooling to room temperature, in step 17, the mold 50 is disassembled, and the mold 50 and the lens L3 are released. Thereby, the plastic lens L3 provided with the primer film 34, the hard coat film 33, and the antireflection film 32 is integrally released from both sides of the plastic lens substrate 35, and the colored lens L3 colored with the pigment 40 is formed. manufactured. The appearance of the lens L3 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L3 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L3 of this example was “A”.

Example 4
FIG. 7 is a flowchart showing a process of manufacturing the colored plastic lens L4 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 8 is a cross-sectional view showing the configuration of the lens L4 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Hard coat film formation)
Next, in Step 13, a hard coat film 33 having a thickness of about 2 μm was formed on the molding surface 51 of each mold 50 on which the antireflection film 32 was formed by the same method as in Example 1.

(Application of pigment dispersion)
Next, in step 20, a pigment dispersion in which the pigment 40 is dispersed is applied to the molding surfaces 51 of the two glass mold dies 50 on which the antireflection film 32 and the hard coat film 33 are formed. Naturally dried. In this example, a pigment dispersion in which the pigment 40 was dispersed was applied in the same manner as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the hard coat film 33.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 8, an antireflection film 32 and a hard coat film 33 are formed on each molding surface 51, and a pigment dispersion liquid in which the pigment 40 is dispersed is applied. The molds 50 were positioned at predetermined intervals, and the molds were assembled by fixing the periphery of the side surfaces with a tape 52 made of plastic film. This mold is the same as the mold of Example 1 except that no primer film is formed and a dye is applied to the lens molding surface side of the hard coat film 33.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50, and the temperature was raised from 30 ° C. to 120 ° C. over 12 hours, and kept constant at 120 ° C. for 2 hours. The plastic lens was manufactured by completing the polymerization and thermosetting the lens substrate 35. Also in this embodiment, the antireflection film 32 and the hard coat film 33 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step, and the desired hardness or A lens L4 provided with each film of performance and colored with the pigment 40 is manufactured.

(Release process)
After slow cooling to room temperature, in step 17, the mold 50 is disassembled, and the mold 50 and the lens L4 are released. As a result, the plastic lens L4 provided with the hard coat film 33 and the antireflection film 32 on both sides from the plastic lens substrate 35 side was integrally released, and a colored lens L4 colored with the pigment 40 was manufactured. The appearance of the lens L4 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L4 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L4 of this example was “A”.

(Example 5)
FIG. 9 is a flowchart showing a process of manufacturing the colored plastic lens L5 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 10 is a cross-sectional view showing the configuration of the lens L5 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surface 51 of each glass mold 50 on which the antireflection film 32 is formed, and is naturally dried. In this example, a pigment dispersion in which the pigment 40 was dispersed was applied by the same method as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the antireflection film 32.

(Hard coat film formation)
Next, in Step 13, a hard coat film having a film thickness of about 2 μm is formed on the molding surface 51 of each mold 50 on which the antireflection film 32 is formed and the pigment dispersion liquid in which the pigment 40 is dispersed is applied. 33 was formed. In this example, it is not applied directly to the inner surface of the antireflection film 32, but the first embodiment is different from the first embodiment except that the composition for hard coat film is applied after the pigment dispersion in which the pigment 40 is dispersed is applied. A hard coat film 33 was formed by the same method.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 10, the antireflection film 32 is formed on each molding surface 51, the pigment dispersion liquid in which the pigment 40 is dispersed is applied, and the hard coat film 33 is further formed. Two mold dies 50 were positioned at a predetermined interval, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of a plastic film. This mold is the same as the mold of Example 1 except that the primer film is not formed and the pigment 40 is applied between the antireflection film 32 and the hard coat film 33.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50 and heated from 30 ° C. to 120 ° C. over 12 hours and kept constant at 120 ° C. for 2 hours. The polymerization was completed, and the lens substrate 35 was thermoset to produce a plastic lens. Also in this embodiment, the antireflection film 32 and the hard coat film 33 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step, and the desired hardness or A lens L5 provided with each film of performance and colored with the pigment 40 is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold was disassembled, and the mold 50 and the lens L5 were released. Thereby, the lens L5 provided with the hard coat film 33 and the antireflection film 32 on both sides from the plastic lens substrate 35 side was integrally released, and the colored lens L5 colored with the pigment 40 was manufactured. The appearance of the lens L5 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L5 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L5 of this example was “A”.

(Example 6)
FIG. 11 is a flowchart showing a process of manufacturing the colored plastic lens L6 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 12 is a cross-sectional view showing the configuration of the lens L6 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Formation of primer film)
Next, in step 14, a primer film 34 having a thickness of about 1 μm was formed on the molding surfaces 51 of the two mold dies 50 on which the antireflection films 32 were formed. In this example, the primer film 34 was formed in the same manner as in Example 1 except that the primer film composition was applied not to the lens substrate side of the hard coat film 33 but to the lens substrate side of the antireflection film 32.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion in which the pigment 40 is dispersed by the same method as in Example 1 on the molding surfaces 51 of the respective mold dies 50 on which the antireflection film 32 and the primer film 34 are formed. Was applied and air dried.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 12, the antireflection film 32 and the primer film 34 are formed on each molding surface 51, and two sheets of pigment dispersion liquid in which the pigment 40 is dispersed are applied. The mold 50 was positioned at predetermined intervals in the same manner as in Example 1, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of plastic film. This mold is the same as the mold of Example 1 except that the hard coat film is not formed.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50 and heated from 30 ° C. to 120 ° C. over 12 hours and kept constant at 120 ° C. for 2 hours. Then, the polymerization was completed, and the lens substrate 35 was thermally cured to form a plastic lens. Also in this embodiment, the antireflective film 32 and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by heat applied in this polymerization step, and have a desired hardness or performance. Thus, a lens L6 that is colored with the pigment 40 is manufactured.

(Release process)
After slow cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L6 are released. Thereby, the lens L6 provided with the primer film 34 and the antireflection film 32 on both sides from the side of the plastic lens substrate 35 was integrally released, and a colored lens L6 colored with the pigment 40 was manufactured. The appearance of the lens L6 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L6 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L6 of this example was “A”.

(Example 7)
FIG. 13 is a flowchart showing a process of manufacturing the colored plastic lens L7 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 14 is a cross-sectional view showing the configuration of the lens L7 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in Step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of the two glass mold dies 50 that had been cleaned in advance in the same manner as in Example 1.

(Formation of antireflection film)
Next, in Step 12, an antireflection film 32 having a thickness of about 100 nm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied, by the same method as in Example 1.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surfaces 51 of the respective mold dies 50 on which the antireflection film 32 is formed, and then naturally dried. In this example, a pigment dispersion in which the pigment 40 was dispersed was applied by the same method as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the antireflection film 32.

(Formation of primer film)
Next, in step 14, a primer film 34 having a film thickness of about 1 μm is formed on the molding surface 51 of each mold 50 on which the antireflection film 32 is formed and the pigment dispersion liquid in which the pigment 40 is dispersed is applied. Formed. In this example, it was not applied to the inner surface of the hard coat film 33, but the primer film composition was applied to the inner surface of the antireflection film 32 coated with the pigment dispersion in which the pigment 40 was dispersed. A primer film 34 was formed in the same manner as in Example 1.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 14, the antireflection film 32 is formed on each molding surface 51, the pigment dispersion liquid in which the pigment 40 is dispersed is applied, and the primer film 34 is further formed. In the same manner as in Example 1, the single mold 50 was positioned at a predetermined interval, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of plastic film. This mold is the same as the mold of Example 1 except that the hard coat film 33 is not provided and the pigment 40 is applied between the antireflection film 32 and the primer film 34.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50 and heated from 30 ° C. to 120 ° C. over 12 hours and kept constant at 120 ° C. for 2 hours. Then, the polymerization was completed, and the lens substrate 35 was thermally cured to form a plastic lens. Also in this embodiment, the antireflective film 32 and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by heat applied in this polymerization step, and have a desired hardness or performance. A lens L7 provided with each of the films is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L7 are released. Thereby, the lens L7 provided with the primer film 34 and the antireflection film 32 on both sides from the side of the plastic lens substrate 35 was integrally released, and a colored lens L7 colored with the pigment 40 was manufactured. The appearance of the lens L7 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L7 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L7 of this example was “A”.

(Example 8)
FIG. 15 is a flowchart showing a process of manufacturing the colored plastic lens L8 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 16 is a cross-sectional view showing the configuration of the lens L8 being manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Hard coat film formation)
Next, in Step 13, a hard coat film 33 having a film thickness of about 2 μm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied. In this example, the hard coat film 33 is not coated on the inner surface of the antireflection film 32, but the hard coat film 33 is formed in the same manner as in Example 1 except that the hard coat film composition is coated on the inner surface of the mold 50. Formed.

(Formation of primer film)
Next, in Step 14, a primer film 34 having a thickness of about 1 μm was formed on the molding surface 51 of each mold 50 on which the hard coat film 33 was formed by the same method as in Example 1.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed by the same method as in Example 1 is applied to the molding surface 51 of each mold 50 on which the hard coat film 33 and the primer film 34 are formed. Apply and air dry.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 16, two molds in which the hard coat film 33 and the primer film 34 are formed on the respective molding surfaces 51 and the pigment dispersion liquid in which the pigment 40 is dispersed are applied. Similarly to Example 1, the mold 50 was positioned at a predetermined interval, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of a plastic film. This mold is the same as the mold of Example 1 except that the antireflection film 32 is not provided.

(Polymerization process)
In the same manner as in Example 1, a thiourethane-based lens monomer was injected into the mold assembled by the mold 50, and the temperature was raised from 30 ° C. to 120 ° C. over 12 hours, and kept constant at 120 ° C. for 2 hours. Then, the polymerization was completed, and the lens substrate 35 was thermoset to form a plastic lens. Also in this embodiment, the hard coat film 33 and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step, and have a desired hardness or performance. A lens L8 provided with each of the films is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L8 are released. Thereby, the lens L8 provided with the primer film 34 and the hard coat film 33 on both sides from the side of the plastic lens substrate 35 was integrally released, and a colored lens L8 colored with the pigment 40 was manufactured. The appearance of the lens L8 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L8 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L8 of this example was “A”.

Example 9
FIG. 17 is a flowchart showing a process of manufacturing the colored plastic lens L9 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 18 is a cross-sectional view showing the structure of the lens L9 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Hard coat film formation)
Next, in Step 13, a hard coat film 33 having a film thickness of about 2 μm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied. In this example, the hard coat film 33 is not coated on the inner surface of the antireflection film 32, but the hard coat film 33 is formed in the same manner as in Example 1 except that the hard coat film composition is coated on the inner surface of the mold 50. Formed.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surfaces 51 of the respective mold dies 50 on which the hard coat film 33 is formed, followed by natural drying. In this example, a pigment dispersion in which the pigment 40 was dispersed was applied in the same manner as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the hard coat film 33.

(Formation of primer film)
Next, in step 14, a primer film 34 having a film thickness of about 1 μm is formed on the molding surface 51 of each mold 50 to which the hard coat film 33 is formed and the pigment dispersion liquid in which the pigment 40 is dispersed is applied. Formed. In this example, it is the same as in Example 1 except that the primer film composition is applied after the pigment dispersion in which the pigment 40 is dispersed is applied instead of being applied directly to the inner surface of the hard coat film 33. The primer film 34 was formed by the method described above.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 18, the hard coat film 33 is formed on each molding surface 51, the pigment dispersion liquid in which the pigment 40 is dispersed is further applied, and the primer film 34 is further formed. In the same manner as in Example 1, the two mold dies 50 were positioned at a predetermined interval, and the mold was assembled by fixing the periphery of the side surface with a tape 52 made of a plastic film. This mold is the same as the mold of Example 1 except that the antireflection film 32 is not provided and the pigment 40 is applied between the hard coat film 33 and the primer film 34.

(Polymerization process)
In the same manner as in Example 1, a thiourethane lens monomer was injected into the assembled mold, and the temperature was raised from 30 ° C. to 120 ° C. over 12 hours, and kept constant at 120 ° C. for 2 hours to complete the polymerization. Then, the lens substrate 35 was thermally cured to form a plastic lens. Also in this embodiment, the hard coat film 33 and the primer film 34 attached to the lens molding surface side of the mold 50 are finally thermally cured by the heat applied in this polymerization step, and have a desired hardness or performance. A lens L9 provided with each of the films is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L9 are released. Thereby, the lens L9 provided with the primer film 34 and the hard coat film 33 on both sides from the side of the plastic lens substrate 35 was integrally released, and a colored lens L9 colored with the pigment 40 was manufactured. The appearance of the lens L9 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L9 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L9 of this example was “A”.

(Example 10)
FIG. 19 is a flowchart showing a process of manufacturing the colored plastic lens L10 using the in-mold method by the manufacturing method of the present invention. Further, FIG. 20 is a cross-sectional view showing the configuration of the lens L10 on the way to be manufactured by the in-mold method, including the mold 50.

(Application of release agent)
First, in step 11, a release agent 58 was applied to the inner surfaces (molding surfaces) 51 of two glass molds 50 that had been washed in advance by the same method as in Example 1.

(Hard coat film formation)
Next, in Step 13, a hard coat film 33 having a film thickness of about 2 μm was formed on the molding surface 51 of each mold 50 to which the release agent 58 was applied. In this example, the hard coat film 33 is applied in the same manner as in Example 1 except that the composition for hard coat film is applied to the inner surface 51 of the mold 50 instead of being applied to the inner surface of the antireflection film 32. Formed.

(Application of pigment dispersion)
Next, in Step 20, a pigment dispersion liquid in which the pigment 40 is dispersed is applied to the molding surfaces 51 of the respective mold dies 50 on which the hard coat film 33 is formed, followed by natural drying. In this example, a pigment dispersion in which the pigment 40 was dispersed was applied in the same manner as in Example 1 except that the coating was applied not on the inner surface of the primer film 34 but on the inner surface of the hard coat film 33.

(Mold mold assembly)
Next, in step 15, as shown in FIG. 20, two mold dies 50 each having a hard coat film 33 formed on each molding surface 51 and coated with a pigment dispersion in which pigment 40 is dispersed are formed. As in Example 1, the mold was assembled by positioning at predetermined intervals and fixing the periphery of the side surface with a tape 52 made of plastic film. This mold is the same as the mold of Example 1 except that the antireflection film 32 and the primer film 34 are not provided and the pigment 40 is applied to the lens substrate side of the hard coat film 33.

(Polymerization process)
In the same manner as in Example 1, a thiourethane lens monomer was injected into the assembled mold, and the temperature was raised from 30 ° C. to 120 ° C. over 12 hours, and kept constant at 120 ° C. for 2 hours. Was polymerized to form a plastic lens. Also in this embodiment, the hard coat film 33 attached to the lens molding surface side of the mold 50 is finally thermally cured by the heat applied in this polymerization step, and a lens having a film having a desired hardness or performance. L10 is manufactured.

(Release process)
After slowly cooling to room temperature, in step 17, the mold is disassembled, and the mold 50 and the lens L10 are released. Thereby, the lens L10 provided with the hard coat film 33 on both sides from the plastic lens substrate 35 side was integrally released, and a colored lens L10 colored with the pigment 40 was manufactured. The appearance of the lens L10 was good with no color unevenness.

(Light resistance test)
A light resistance test was performed on the colored plastic lens L10 obtained through Steps 11 to 17 described above in the same manner as in Example 1. The light resistance evaluation of the colored plastic lens L10 of this example was “A”.

  FIG. 21 collectively shows evaluation results of light resistance and appearance of the colored lenses L1 to L10 manufactured in Examples 1 to 10. The evaluation results of the lenses L1 to L10 were all good in light resistance and appearance. According to the production method of the present invention, a pigment-based colorant can be applied to the lens substrate side of an antireflection film, a hard coat film or a primer film by an ink jet method, so when these films are released from the lens substrate integrally In addition, the pigment is released in a state of being incorporated into the lens together with the pigment. Therefore, a color lens can be easily produced with a pigment-based colorant, and a color lens having a good appearance and high light resistance can be produced.

  In the manufacturing method of the present invention, since the pigment is applied in the mold, there is almost no pigment that is not used for coloring the plastic lens in the course of manufacturing the plastic lens, and the entire amount is reliably used for coloring the plastic lens. be able to. Therefore, the color tone can be completely controlled by the amount of the pigment applied in the mold. For this reason, it is possible to provide a lens having a color tone as desired by the user, and it is possible to provide a colored lens that is free from color loss and color unevenness and has excellent light resistance.

  Furthermore, since a pigment-based colorant that is commercially available as an ink for a printer can be applied with a commercially-available inkjet printer, it is economical, and a color lens that is actually colored using a pigment-based colorant can be used. Mass production is possible. Furthermore, in the manufacturing method of the present invention, a color lens can be manufactured by applying an ink marketed as an ink for a printer, in particular, a pigment ink using an inkjet head of the printer. For this reason, it becomes possible to dye | stain a lens by interlock | cooperating an inkjet head with a computer, and it becomes possible to manufacture a lens of various color variations with the same feeling as printing on paper with a printer.

  The compositions and film thicknesses of the antireflection film, hard coat film, primer film, etc. shown in the above examples are merely examples, and the present invention is not limited to these compositions. For example, the antireflection film 32 is formed in order to reduce ghost and flicker due to surface reflection of the lens, and the film thickness is 50 to 150 nm, preferably 70 to 70, in order to ensure desired antireflection properties. 130 nm.

  The hard coat film 33 is formed in order to improve the abrasion resistance of the plastic lens surface, and the film thickness is 0.5 to 10 μm, preferably 1 to 5 μm. When the film thickness is less than 0.5 μm, it is difficult to obtain an effect as a hard coat film. On the other hand, if it exceeds 10 μm, it is difficult to ensure the appearance. Further, the composition of the hard coat film is not limited to the composition mainly composed of the inorganic fine particles having a particle diameter of 1 to 100 mμ, the organosilicon compound, the polyfunctional epoxy compound, and the curing catalyst described above. For example, even a plastic lens having a hard cord film that does not contain a polyfunctional epoxy compound can be easily dyed by the production method of the present invention.

  The primer film 34 has a film thickness of 0.1 to 5 μm, in order to impart functions such as improved adhesion between the plastic lens substrate 35 and the hard coat film 33, and improved impact resistance. It is desirable to be 5 to 3 μm. When the film thickness is less than 0.1 μm, it is difficult to obtain impact resistance. On the other hand, if it exceeds 3 μm, it is difficult to ensure the appearance. The composition of the primer film is not limited to a composition mainly composed of an aqueous acrylic-urethane resin, and may be a composition mainly composed of a polyester-based thermoplastic elastomer, for example.

  In the manufacturing method of the present invention, after applying (forming) each functional film such as an antireflection film on the lens molding surface side of the mold, the functional film such as the antireflection film is cured by applying light or heat. However, at this time, as described above, it is possible to proceed to the next step in a semi-cured state or as a previous state, but it is of course possible to cure almost completely, and the curing temperature and the curing time are appropriately adjusted. That's fine.

  For each functional film, it is desirable to perform a surface treatment in order to improve adhesion and coating properties. Specific examples include acid treatment, alkali treatment, ultraviolet irradiation treatment, plasma treatment, ion beam irradiation treatment, and a method of physically polishing the surface.

  As an adhesive sheet for positioning and fixing the mold 50 at a predetermined interval, an example in which the tape 52 is used is described. However, a sheet serving as a base material of the tape 52 is a plastic film, metal foil, paper, cloth, or the like. However, a plastic film is preferable in terms of chemical resistance, heat resistance, strength, cost, and the like. The thickness of the film is preferably about 2 to 100 μm considering the followability to the glass mold.

  In addition, after releasing the colored plastic lens having various coating films (functional films) from the mold 50, an inorganic antireflection film is formed, or an antifouling film or It is possible to further form another functional film such as an antifogging film.

3 is a flowchart showing a manufacturing process of a lens according to Example 1. FIG. 3 is a cross-sectional view illustrating a configuration of a lens according to Example 1 including a mold. 9 is a flowchart showing a manufacturing process of a lens according to Example 2. Sectional drawing which shows the structure of the lens which concerns on Example 2 in the state including a mold type. 9 is a flowchart showing a manufacturing process of a lens according to Example 3. Sectional drawing which shows the structure of the lens which concerns on Example 3 in the state including a mold type. 9 is a flowchart showing a manufacturing process of a lens according to Example 4. Sectional drawing which shows the structure of the lens which concerns on Example 4 in the state including a mold type. 10 is a flowchart illustrating a manufacturing process of a lens according to Example 5. Sectional drawing which shows the structure of the lens which concerns on Example 5 in the state including a mold type. 10 is a flowchart showing a manufacturing process of a lens according to Example 6. Sectional drawing which shows the structure of the lens which concerns on Example 6 in the state including a mold type. 10 is a flowchart showing a manufacturing process of a lens according to Example 7. Sectional drawing which shows the structure of the lens which concerns on Example 7 in the state containing a mold type. 10 is a flowchart showing a manufacturing process of a lens according to Example 8. Sectional drawing which shows the structure of the lens which concerns on Example 8 in the state including a mold type. 10 is a flowchart showing a manufacturing process of a lens according to Example 9. Sectional drawing which shows the structure of the lens which concerns on Example 9 in the state including a mold type. 10 is a flowchart showing a manufacturing process of a lens according to Example 10. Sectional drawing which shows the structure of the lens which concerns on Example 10 in the state including a mold type. The figure which shows the evaluation result of the colored lenses L1-L10 manufactured in Examples 1-10.

Explanation of symbols

11-18 Each manufacturing process, 20 Pigment adhesion (application) process 32 Antireflection film, 33 Hard coat film, 34 Primer film, 35 Lens substrate 50 Mold mold, 51 Mold surface (inner surface)
L1-L10 Colored plastic lens

Claims (4)

A film attaching step of attaching a composition for forming a film to be released integrally with the lens base material to the molding surface side of the mold having a molding surface for molding a plastic lens surface;
After the film attaching step, a coloring step of attaching a colorant containing a pigment to the molding surface side of the mold by an inkjet method;
A polymerization step of injecting and curing a composition for forming the lens substrate by combining a pair of molds; and
A method for producing a plastic lens, comprising: a mold release step of integrally releasing the film and the lens substrate from the mold. In Claim 1, it has a plurality of said film adhesion processes which form a plurality of said films,
The method of manufacturing a plastic lens, wherein the coloring step is performed after the film attaching step for forming the last film or between the film attaching steps for forming any of the films.   2. The method of manufacturing a plastic lens according to claim 1, wherein the film is a hard coat film. 3. The plurality of film attaching steps for forming the plurality of films include a hard coat film attaching step for attaching a composition for forming a hard coat film, and an antireflection film before the hard coat film attaching step. At least any two steps of an antireflection film attaching step for attaching a composition for forming a primer, and a primer film attaching step for attaching a composition for forming a primer film after the hard coat film attaching step A method for producing a plastic lens.

Images