JP2013246347A - Method for manufacturing spectacle lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing spectacle lenses capable of reducing a used amount of coating liquid for forming a cured coating film and reducing an adhesion amount of the coating liquid to a lens cutting surface.SOLUTION: The method for manufacturing spectacle lenses is provided, the method including, applying a curable coating liquid to a coating object surface of a lens, subjecting the coating liquid to curing treatment, and forming a cured coating film. The coating is performed by immersing the coating object surface in the curable coating liquid in a liquid tank, while facing the surface vertically downward, and then pulling it up. However, in the immersion, the cutting surface of the lens is not completely immersed in the curable coating liquid in the liquid tank. After the coating, the lens is rotated with the coating object surface facing vertically downward and enclosed by the inner wall of the liquid tank, and then performs the curing treatment.

Description

  The present invention relates to a method for manufacturing a spectacle lens, and more particularly to a method for manufacturing a spectacle lens having a cured coating.

  In general, a spectacle lens achieves a desired refractive index with a lens base material, and various performances (light control performance, antireflection performance, durability improvement, etc.) are imparted by a film provided on the lens base material ( For example, see Patent Document 1).

WO2005 / 014717A1

In the manufacturing process of spectacle lenses, as a film forming method for forming a film on a lens substrate, the spin coat method used in the examples of Patent Document 1 is widely used.
However, the spin coating method is a method of spreading the coating liquid over the entire surface by centrifugal force due to rotation by supplying the coating liquid from above while rotating the surface to be coated facing vertically upward. The amount of liquid that is blown away and does not contribute to film formation is large. As a result, in the film formation by the spin coating method, the amount of the coating liquid used for forming a film having a predetermined film thickness increases. This tendency becomes more prominent as a thick film is formed. This is because, in order to form a thick film, the viscosity of the coating solution is usually increased. However, as the viscosity is increased, a large centrifugal force is applied by increasing the rotational speed in order to spread the coating solution uniformly over the entire lens surface. This is because as the centrifugal force is increased, the amount of liquid ejected from the lens increases. In the spin coating method, the coating liquid blown off by the centrifugal force adheres to the lens edge surface, and adheres to the conveying jig when the edge surface is held and conveyed for the next process after the spin coating. It has been a process load, such as making handling difficult and requiring round processing on the outer periphery of the lens to remove the applied coating solution.

  Accordingly, an object of the present invention is to provide a method for manufacturing a spectacle lens capable of reducing the amount of coating liquid used for forming a cured film and reducing the amount of coating liquid deposited on the lens edge surface.

The inventors of the present invention have paid attention to the dip coating method as a coating method of a coating solution for forming a cured film, while intensively studying to achieve the above object. The dip coating method is a method in which the entire lens to be coated is immersed in the coating solution and then pulled up to apply the coating solution to the lens. Usually, the lens surface is perpendicular to the liquid surface as described above. Soak and pull up.
In this normal dip coating method, the entire lens is immersed in a coating solution, whereas the present inventors adopt the following means (1) and (2) to form a film on the lens, It was newly found that the amount of coating solution used can be reduced and the amount of coating solution adhering to the lens edge surface can be reduced.
(1) The coating liquid is applied to the surface to be coated by immersing it in the coating liquid in the liquid tank with the surface to be coated facing vertically downward and then pulling it up. However, the lens edge surface is not completely immersed in the coating solution.
(2) After the application, the lens is rotated with the surface to be applied facing vertically downward and surrounded by the inner wall of the liquid tank, and then the coating liquid is cured to form a cured film.
The reason why the use of the above means (1) and (2) makes it possible to reduce the amount of coating solution used and the amount of coating solution adhering to the lens edge surface is as follows.
In the normal dip coating method, the entire lens including the edge surface is immersed in the coating solution, whereas in the above means (1), the surface to be coated is selectively immersed in the coating solution. Can be reduced,
By rotating the lens with the coated surface facing vertically downward after coating, excess coating liquid on the coated surface is blown down by centrifugal force or flows down along the inner wall surface. Being recovered in the liquid, and
Even if the coating liquid adheres to the lens edge surface during application, the coating liquid adhered to the edge surface flows down when the lens is pulled up from the application liquid in the liquid tank with the surface to be coated vertically downward. Reduces the amount of coating liquid adhering to the lens edge surface by blowing off the coating liquid adhering to the lens edge surface by centrifugal force when the lens is rotated with the surface to be coated facing vertically downward What you can do,
In this case, the present inventors speculate.
The present invention has been completed based on the above findings.

That is, the above object has been achieved by the following means.
[1] A method for manufacturing a spectacle lens, comprising: forming a cured film by applying a curable coating solution to a surface to be coated of a lens and then performing a curing process on the coating solution;
The coating is performed by immersing in a curable coating liquid in a liquid tank with the surface to be coated facing vertically downward, and then pulling up, but the edge surface of the lens is curable in the liquid tank during the immersion. Do not completely immerse in the coating solution,
After the application, the manufacturing method is characterized in that the lens is rotated in a state where the surface to be applied is directed vertically downward and surrounded by an inner wall of the liquid tank, and then the curing process is performed.
[2] The method for manufacturing a spectacle lens according to [1], wherein the surface to be coated is kept vertically downward during the period from the application to the end of the curing process.
[3] The method for manufacturing a spectacle lens according to [1] or [2], wherein the coated surface is a surface of a water-based resin layer formed on a lens substrate.
[4] The method for producing a spectacle lens according to any one of [1] to [3], wherein the curable coating solution is a coating solution for forming a photochromic layer containing a photochromic dye and a curable component.
[5] The method for manufacturing a spectacle lens according to any one of [1] to [4], wherein the curable coating liquid is a photocurable composition.

  According to the present invention, when manufacturing a spectacle lens having a functional film for imparting desired performance, the amount of the functional film forming coating solution used is reduced and the amount of the coating solution adhering to the lens edge surface is reduced. Is possible. Thereby, according to this invention, the manufacturing cost and process load in the manufacturing process of an eyeglass lens can be reduced.

It is a schematic explanatory drawing of the coating method of the curable coating liquid to the to-be-coated surface in the manufacturing method of the spectacle lens of this invention. It is explanatory drawing of the film thickness measurement position in an Example and a comparative example.

The present invention relates to a method for manufacturing a spectacle lens including applying a curable coating liquid to a surface to be coated of a lens and then forming a cured film by performing a curing process of the coating liquid.
In the method for manufacturing a spectacle lens according to the present invention, the application is performed by immersing the curable coating solution in the liquid tank in a state where the surface to be applied is directed vertically downward and then pulling it up. However, the edge surface of the lens is not completely immersed in the curable coating solution in the liquid tank during the immersion. Then, after the application, the lens is rotated in a state where the surface to be applied faces vertically downward and is surrounded by the inner wall of the liquid tank, and then the curing process is performed. As a result, as described above, it is possible to reduce the amount of coating solution used for forming a cured coating and to reduce the amount of coating solution adhering to the lens edge surface.
Hereinafter, the manufacturing method of the spectacle lens of the present invention will be described in more detail.

In the spectacle lens manufacturing method of the present invention, the surface to be coated on which the curable coating liquid is applied may be the lens base material surface or the functional film surface formed on the lens base material. .
The lens substrate is not particularly limited, and materials usually used for the lens substrate of spectacle lenses, specifically, those made of plastic, inorganic glass, and the like can be used. The thickness and diameter of the lens substrate are not particularly limited, but are usually about 1 to 30 mm in thickness and about 50 to 100 mm in diameter. The surface shape of the surface to be coated may be a curved surface (specifically, a convex surface or a concave surface) or a flat surface. In the film formation by the spin coating method described above, the surface shape in which the coating liquid is most likely to adhere to the lens edge surface is a convex surface. It is preferable to apply to a mode in which a cured film is formed on a lens having a convex surface.

  The curable coating solution can be applied to the surface of the lens substrate, or can be indirectly formed through one or more functional films. Examples of such a functional film include a hard coat layer for improving durability and a primer layer for improving adhesion. The thickness of the hard coat layer and primer layer formed here is, for example, about 0.5 to 10 μm. Some lens base materials are commercially available with a hard coat, and such lens base materials can also be used in the present invention.

  From the viewpoint of obtaining a spectacle lens having high durability by preventing peeling of the cured film to be formed, the surface to be coated is preferably the surface of the primer layer. As the primer layer, an aqueous resin layer is preferable. Here, the aqueous resin layer is an aqueous resin composition in which a resin component such as polyurethane resin is dispersed or dissolved in an aqueous solvent (water or a mixed solvent of water and an organic solvent), and is solidified by drying and removing the aqueous solvent. It shall mean the formed film. Since the aqueous resin layer can exhibit good wettability with respect to the curable coating liquid, applying and curing the curable coating liquid on the surface of the aqueous resin layer is necessary for forming a uniform cured film. It is advantageous. JP, 2011-170339, A paragraphs [0038]-[0042] can be referred to for details of the water-based resin composition used for forming a water-based resin layer, for example.

  Next, a method for applying the curable coating liquid onto the surface to be coated will be described with reference to FIG. FIG. 1 is a schematic explanatory view of a method for applying a curable coating liquid onto a surface to be coated in the method for producing a spectacle lens of the present invention.

In the spectacle lens manufacturing method of the present invention, a dip coating method is employed as a method of applying a curable coating solution for forming a cured film on the lens. In the normal dip coating method, the surface to be coated is perpendicular to the liquid surface of the coating liquid in the liquid tank, and the entire coated object is immersed in the coating liquid and then pulled up. Then, it immerses in the curable coating liquid in a liquid tank in the state which turned the to-be-coated surface vertically downward, and then pulls up. Therefore, the surface to be coated is immersed in the liquid in a state substantially parallel to the liquid surface of the curable coating liquid. However, the edge surface of the lens is not completely immersed in the curable coating solution in the liquid tank during this immersion.
Specifically, as shown in FIG. 1A, the lens 1 is disposed on the surface of the curable coating liquid 3 in the liquid tank 2 with the surface 11 to be coated facing vertically downward. Thereafter, with the surface to be coated 11 directed vertically downward, the surface to be coated 11 is immersed in the curable coating solution 3 as shown in FIG. 1 (b), and then pulled up as shown in FIG. 1 (c). However, the edge surface 12 is not completely immersed in the curable coating solution 3 as shown in FIG. As a result, it is possible to prevent a large amount of the curable coating liquid from adhering to the edge surface and impose a load on the subsequent processes. Further, even if the curable coating liquid adheres to the edge surface, the attached curable coating liquid can be caused to flow down when the application surface is pulled up with the surface to be applied facing vertically downward. This point can also contribute to reducing the amount of adhesion to the edge surface.

When the coated surface 11 is a convex surface, if the entire outer periphery of the convex surface is immersed in the curable coating solution, the entire coated surface comes into contact with the curable coating solution and is applied. The same applies when the coated surface 11 is a flat surface. Therefore, when the surface to be coated is a convex surface or a flat surface, it is possible to perform coating on the entire surface to be coated without substantially immersing the edge surface in the curable coating solution. Here, “substantially not dipping” is used in a sense that allows dipping of about 1/5 or less of the edge thickness.
On the other hand, when the surface to be coated 11 is concave, the concave surface has a deep central portion with respect to the outer peripheral portion, so the surface to be coated is immersed in the curable coating solution so that the central portion of the concave surface is immersed in the curable coating solution. Then, the lower part of the edge surface is also immersed in the curable coating solution. In this way, for the concave surface, in order to apply the curable coating liquid to the entire surface to be coated, a part of the lower part of the edge surface is also immersed in the curable coating liquid. From the viewpoint of reduction, the coated surface is preferably a convex surface or a flat surface.

After the application, as shown in FIG. 1 (d), the lens is rotated in a state where the surface to be applied of the lens faces vertically downward and is surrounded by the inner wall of the liquid tank. As a result, surplus curable coating liquid is blown off from the lens by centrifugal force, but the curable coating liquid that has been blown off flows down to the lower curable coating liquid or travels along the inner wall of the liquid tank in the liquid tank. In the curable coating solution. In order to increase the recovery rate of the curable coating liquid, the inner wall of the liquid tank is preferably a water-repellent surface, and preferably a fluororesin surface such as Teflon (registered trademark).
Thus, according to the present invention, an excessive curable coating solution can be recovered and used again for coating by the dip coating method. Moreover, the said process can also play the role which dries a curable coating liquid and makes a film thickness uniform. In addition, even if the curable coating liquid adheres to the edge surface, the curable coating liquid can also be removed from the edge surface by centrifugal force by rotating the lens with the surface to be coated facing vertically downward. This can contribute to a reduction in the amount of adhesion to the edge surface.
The rotation conditions (number of rotations and rotation time) in the rotation may be set to appropriate conditions in consideration of the viscosity of the curable coating solution and the like so that a cured film having a desired film thickness can be obtained. At the time of the above rotation, if at least the coated surface of the lens is surrounded by the inner wall of the liquid tank, the curable coating liquid blown off by centrifugal force can be recovered into the curable coating liquid in the liquid tank. In order to reliably collect the lens, it is preferable to rotate the lens while the entire lens is taken into the inner wall of the liquid tank.

  The above process can be performed, for example, in a state where the lens surface opposite to the coated surface is held by a suction jig or the like.

  Next, the curable coating liquid applied to the surface to be coated is subjected to a curing process according to the type of curable component contained in the curable coating liquid. More specifically, the curing treatment is performed by heating when the curable component is a thermosetting component, and by light irradiation when the curable component is a photocurable component. The longer the time until the curing is completed, the more the liquid flows, which is not desirable from the viewpoint of increasing the uniformity of the film thickness. From this point, it is preferable to use a photo-curable coating liquid that can be cured in a short time.

  By the way, depending on the viscosity of the curable coating liquid, the liquid may flow by changing the direction, such as turning the coated surface facing downward vertically before performing the curing process, and the uniformity of the film thickness may decrease. The coating liquid may flow down to the edge surface. Therefore, it is preferable to maintain the state in which the surface to be coated faces vertically downward during the period from the application of the curable coating liquid to the surface to be coated until the curing process is completed. For example, the lens holding in the coating device, the coating device to the curing device, which performs a series of steps from coating to curing in a chamber having a holding means capable of holding the lens with the surface to be coated facing vertically downward. The coating and curing process is completed by adopting means such as carrying the lens up to and holding the lens in the curing device using a conveyance holding unit that can maintain the coated surface facing vertically downward. During this period, it is possible to maintain a state in which the surface to be coated of the lens faces vertically downward.

  Next, the curable coating liquid applied to the surface to be coated will be described.

  As the curable coating solution, one that can form a film capable of imparting desired performance to the lens is selected and used. As the coating film to be formed becomes thicker, the amount of coating solution used increases, and the cost advantage of reducing the amount of coating solution used increases. Therefore, the present invention capable of reducing the amount of the coating solution used is advantageously applied to a method for manufacturing a spectacle lens that forms a cured film formed in a thick film. In general, a photochromic layer can be given as an example of a cured film that is often formed in a thick film of 10 μm or more, and further 20 μm or more.

  The photochromic layer is formed by subjecting a photochromic layer forming coating solution containing a photochromic dye and a curable component to a curing treatment according to the type of the curable composition contained. More specifically, the coating liquid for forming the photochromic layer can be formed from a photochromic dye, a curable component, a polymerization initiator, and an additive that is optionally added. Below, each component is demonstrated.

(I) Curable component The curable component that can be used for forming the photochromic layer is not particularly limited, and radical polymerization such as (meth) acryloyl group, (meth) acryloyloxy group, vinyl group, allyl group, styryl group, etc. Known polymerizable monomers and oligomers having a functional group, and prepolymers thereof can be used. Among these, acrylic compounds such as a compound having a (meth) acryloyl group or a (meth) acryloyloxy group as a radical polymerizable group are preferable because of easy availability and good curability. The (meth) acryloyl refers to both acryloyl and methacryloyl, and (meth) acryloyloxy refers to both acryloyloxy and methacryloyloxy. For details thereof, WO2008 / 001578A1 paragraphs [0050] to [0075] can be referred to.

(Ii) Photochromic dye As the photochromic dye that can be added to the coating solution for forming the photochromic layer, known ones can be used, and examples thereof include photochromic compounds such as fulgimide compounds, spirooxazine compounds, and chromene compounds. In the invention, these photochromic compounds can be used without particular limitation. For details thereof, WO2008 / 001578A1 paragraphs [0076] to [0088] can be referred to. The concentration of the photochromic dye in the coating solution for forming the photochromic layer is preferably 0.01 to 20 parts by mass, more preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the curable component. preferable.

(Iii) Polymerization initiator The polymerization initiator added to the photochromic layer-forming coating solution can be appropriately selected from known thermal polymerization initiators and photopolymerization initiators according to the polymerization method. For details thereof, WO2008 / 001578A1 paragraphs [0089] to [0090] can be referred to.

(Iv) Additives In order to improve the durability of the photochromic dye, to improve the color development rate, to improve the fading rate and to improve the moldability, the coating solution for forming the photochromic layer further contains a surfactant, an antioxidant, a radical Additives such as a scavenger, an ultraviolet stabilizer, an ultraviolet absorber, a release agent, an anti-coloring agent, an antistatic agent, a fluorescent dye, a dye, a pigment, a fragrance, and a plasticizer may be added. As these additives, known compounds can be used without any limitation. For details thereof, WO2008 / 001578A1 paragraphs [0092] to [0097] can be referred to.

  A photochromic layer can be formed on a lens substrate by applying and curing a photochromic layer forming coating solution containing the components described above. In the present invention, the method for preparing the photochromic liquid is not particularly limited, and can be performed by weighing and mixing a predetermined amount of each component. The order of addition of each component is not particularly limited, and all the components may be added simultaneously, or only the monomer component is mixed in advance, and a photochromic dye or other additive may be added and mixed immediately before polymerization. Good. The coating liquid for forming the photochromic layer preferably has a viscosity at 25 ° C. of 20 to 500 cps, more preferably 50 to 300 cps, and particularly preferably 60 to 200 cps. By setting it as this viscosity range, application | coating of the coating liquid for photochromic layer formation becomes easy, and the photochromic layer of desired thickness can be obtained easily. The film thickness of the photochromic layer can be controlled by application conditions.

  A photochromic layer is formed by applying the photochromic layer-forming coating solution to the surface to be coated of the lens and then performing a curing process (heating, light irradiation, etc.) according to the type of curable component contained in the photochromic solution. be able to. The curing treatment can be performed by a known method. From the viewpoint of the performance of the formed photochromic layer and the completion of the curing process in a short time, it is preferable to form the photochromic layer by a photocuring process. The thickness of the photochromic layer is preferably 10 μm or more, more preferably 20 to 60 μm, from the viewpoint of satisfactorily expressing the photochromic characteristics.

  In addition to the photochromic layer described above, examples of the cured film that tends to be formed into a thick film include a hard coat layer. In order to improve the scratch resistance of the spectacle lens, the hard coat layer is preferably 5 μm or more, more preferably 10 μm or more, for example, 10 to 30 μm thick. As the amount of the coating liquid is increased, the amount of the coating liquid that is wasted from the surface to be coated and is wasted increases. On the other hand, according to the present invention, it is possible to reduce the amount of coating solution used when forming a thick hard coat layer. As the hard coat layer forming coating solution, a known hard coat solution can be used.

  The present invention will be further described below with reference to examples. However, the present invention is not limited to the embodiment shown in the examples.

[Example 1]
(1) Formation of primer layer Meniscus diethylene glycol bisallyl carbonate (manufactured by HOYA Co., Ltd., trade name HILUX, center wall thickness 2.0 mm, diameter 75 mm, convex surface base curve 1.00BC) ), And an aqueous dispersion of polyurethane (polycarbonate polyol-based polyurethane emulsion, viscosity 100 CPS, solid content concentration 38% by mass) in which an acrylic group is introduced into a polyurethane skeleton as a primer solution on the convex surface of the lens base material. Then, it was air-dried for 15 minutes in an atmosphere of a temperature of 25 ° C. and a humidity of 50% RH to form a primer layer having a thickness of about 7 μm.

(2) Preparation of photochromic coating solution 20 parts by mass of trimethylolpropane trimethacrylate, 35 parts by mass of BPE oligomer (2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane), EB6A (polyester oligomer hexaacrylate) in a plastic container ) A radical polymerizable composition comprising 10 parts by mass, 10 parts by mass of polyethylene glycol diacrylate having an average molecular weight of 532, and 10 parts by mass of glycidyl methacrylate was prepared. With respect to 100 parts by mass of this radical polymerizable composition, 3 parts by mass of the following chromene 1 as a photochromic dye, 5 parts by mass of a hindered amine antioxidant (BASF Chimassorb 2020), and CGI-1870 (BASF) as an ultraviolet polymerization initiator 6 parts by mass of γ-methacryloyloxypropyltrimethoxysilane (KBM503 manufactured by Shin-Etsu Chemical Co., Ltd.) was added dropwise to the composition which was sufficiently stirred and mixed by adding 0.6 parts by mass). . Then, the curable composition which has photochromic property was obtained by defoaming for 2 minutes with a rotation-revolution system stirring defoaming apparatus.

(3) Formation of photochromic layer On the primer layer formed in the above (1), the curable composition prepared in (2) was coated by the dip coating method shown in FIG.
Specifically, the lens to be applied was held in a state where the convex surface was vertically held downward by the lens holding means having the suction holding mechanism, the transport mechanism, and the rotation mechanism, and the opposite concave surface was sucked and held. Thereafter, the lens is lowered to a position where the entire outer periphery of the convex surface is immersed in the curable composition in the liquid tank made of Teflon and the edge surface is not substantially immersed (the immersion part of the edge surface is 0.1 mm or less), It dipped for 5 seconds, and then pulled up from the liquid level by raising (FIGS. 1 (a) to (c)).
Thereafter, the lens was rotated at a rotational speed of 100 to 600 rpm for about 35 seconds in a state where the entire lens was surrounded by the inner wall of the liquid tank with the convex surface of the lens facing vertically downward.
The rotated lens is transferred to a chamber for photocuring treatment with the convex surface facing vertically downward, and a UV lamp (D bulb) in the nitrogen atmosphere (oxygen concentration of 500 ppm or less) in the chamber. Then, an ultraviolet ray having a wavelength of 405 nm was irradiated with an integrated light amount of 18 J / cm ² (100 mW / cm ² , 3 minutes), and further cured at 100 ° C. for 60 minutes to form a photochromic layer having a thickness of about 40 μm.

[Comparative Example 1]
The photochromic coating solution is applied by spin coating with the convex surface as the application surface facing vertically upward, and then photocuring treatment is performed with the convex surface facing vertically upward, and a photochromic layer having a thickness of about 40 μm. The same as Example 1 except that was formed.

  In Example 1 and Comparative Example 1, a photochromic layer was formed on each of two lenses.

Evaluation result About Example 1, when the liquid amount used for application | coating was calculated from the change of the photochromic coating liquid amount in the liquid tank before and behind application | coating, the liquid amount required for application | coating per lens was about 0.2g. there were.
On the other hand, in Comparative Example 1, the amount of the photochromic coating solution discharged during spin coating was about 0.7 g per lens.
Further, when the lens edge surface after formation of the photochromic layer was observed for the lens obtained in Example 1 and the lens obtained in Comparative Example 1, a large amount of liquid adhered to the lens obtained in Comparative Example 1 and was cured. . Since this cured product causes a foreign matter defect in the subsequent cleaning process, it is necessary to remove the outer periphery by rounding. Moreover, the coating liquid adhering to the edge surface becomes difficult to handle by adhering to the conveying jig in a state before curing.
On the other hand, in the lens obtained in Example 1, the coating liquid adhered to the edge surface was so small that rounding of the outer periphery was unnecessary.

Confirmation of in-plane distribution of film thickness With respect to the lenses obtained in Example 1 and Comparative Example 1, the optical geometric film thickness measuring instrument was used to measure the lens geometric center and lens geometric center of the photochromic layer formed on the convex surface of the lens in the vertical and horizontal directions. The measurement was made at a total of nine points (see FIG. 1, the positions with numbers are the measurement points) equally spaced in the direction.
Tables 1 and 2 below show the measurement results of the two lenses produced for Example 1 and Comparative Example 1, respectively. From the comparison of the measurement result of the lens of Example 1 shown in Table 1 and the measurement result of the lens of Comparative Example 1 shown in Table 2, according to the present invention, the curing has a uniform film thickness as in the case of spin coating. It can be confirmed that a film can be formed.

  The present invention is useful in the field of manufacturing various eyeglass lenses such as photochromic lenses.

Claims (5)

A method for manufacturing a spectacle lens, comprising: forming a cured film by applying a curable coating solution to a surface to be coated of a lens and then performing a curing process on the coating solution;
The coating is performed by immersing in a curable coating liquid in a liquid tank with the surface to be coated facing vertically downward, and then pulling up, but the edge surface of the lens is curable in the liquid tank during the immersion. Do not completely immerse in the coating solution,
After the application, the manufacturing method is characterized in that the lens is rotated in a state where the surface to be applied is directed vertically downward and surrounded by an inner wall of the liquid tank, and then the curing process is performed. The method for manufacturing a spectacle lens according to claim 1, wherein a state in which the surface to be coated is directed vertically downward is maintained from the application to the end of the curing process. The method for manufacturing a spectacle lens according to claim 1, wherein the coated surface is a surface of a water-based resin layer formed on a lens substrate. The method for producing a spectacle lens according to any one of claims 1 to 3, wherein the curable coating solution is a coating solution for forming a photochromic layer containing a photochromic dye and a curable component. The method for producing a spectacle lens according to claim 1, wherein the curable coating liquid is a photocurable composition.