Eyeglass lens, method for manufacturing an eyeglass lens, and eyeglasses

Abstract

To provide an antimicrobial eyeglass lens excellent in light resistance and water resistance.SOLUTION: An eyeglass lens 1 comprises a lens base material 11 and an inorganic layer 13, and further comprises a metal-containing layer 14 on the side of a surface of the inorganic layer 13 opposite to the lens base material 11. The metal contained in the metal-containing layer 14 includes a first metal and a second metal, the first metal being silver, and the second metal being one or more metals selected from the group consisting of cobalt, nickel, zinc, copper, zirconium, molybdenum, lead, platinum, gold and palladium.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for manufacturing spectacle lenses and spectacles.

Background Art

[0002] Spectacle lenses generally have a configuration in which one or more functional layers are formed on the surface of a lens substrate (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, the need for antibacterial properties has been increasing. Under such circumstances, if a function (i.e., antibacterial property) capable of suppressing the growth of bacteria can be imparted to spectacle lenses, the added value of the spectacle lenses can be increased.

[0005] Furthermore, spectacle lenses are exposed to light and moisture during long-term use by spectacle wearers after being incorporated into spectacles. Therefore, it is desirable that the spectacle lenses have excellent light resistance and water resistance of the antibacterial property.

[0006] One aspect of the present invention aims to provide a spectacle lens having excellent light resistance and water resistance of antibacterial property.

Means for Solving the Problems

[0007] One aspect of the present invention is having a lens substrate and an inorganic layer, further having a metal-containing layer on the surface side opposite to the lens substrate of the inorganic layer, the metal contained in the metal-containing layer includes a first metal and a second metal, the first metal is silver, The second metal is one or more metals selected from the group consisting of cobalt, nickel, zinc, copper, zirconium, molybdenum, lead, platinum, gold, and palladium, and is a spectacle lens, relates to.

[0008] The metal-containing layer can function as an antibacterial layer for imparting antibacterial properties to the spectacle lens. By having such a layer, the spectacle lens can exhibit antibacterial properties. Regarding antibacterial properties, silver contained as the first metal can function as an antibacterial component. It is presumed that the second metal can contribute to enhancing the light resistance and water resistance of the antibacterial performance exhibited by silver by controlling the progress of silver oxidation. Thus, the inventor presumes that the spectacle lens having the metal-containing layer containing the first metal and the second metal can exhibit excellent light resistance and water resistance with respect to antibacterial properties. However, the present invention is not limited to the presumption described in this specification.

Advantages of the Invention

[0009] According to one aspect of the present invention, it is possible to provide a spectacle lens excellent in light resistance and water resistance of antibacterial properties.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0011] [Eyeglass Lens and Method for Manufacturing the Same] Hereinafter, the above eyeglass lens and the manufacturing method thereof will be described in more detail.

[0012] [Metal-Containing Layer] The metal-containing layer of the above eyeglass lens contains silver (Ag) as the first metal and one or more metals other than silver as the second metal. The second metal is one or more metals selected from the group consisting of cobalt (Co), nickel (Ni), zinc (Zn), copper (Cu), zirconium (Zr), molybdenum (Mo), lead (Pb), platinum (Pt), gold (Au), and palladium (Pd), and is preferably one or more metals selected from the group consisting of zirconium, platinum, gold, and palladium. Among them, platinum is preferable because in addition to being able to contribute to controlling the progress of silver oxidation, it can exhibit antibacterial properties.

[0013] Examples of the forms of existence of the first metal and the second metal in the above metal-containing layer include the form of a simple metal or an alloy, the form of an inorganic compound or an organic compound, the form of metal ions, etc. The form of a metal complex can also be mentioned. The inventor believes that at least a part of silver, which is the first metal, can be ionized by oxidation to exhibit antibacterial properties, and this contributes to the metal-containing layer being able to function as an antibacterial layer. In addition, the inventor believes that selecting the above metal that can exert the effect of controlling the progress of silver oxidation as the second metal contributes to enhancing the light resistance and water resistance of antibacterial properties.

[0014] The above metal-containing layer is a layer located on an inorganic layer provided on a lens substrate and can be formed on the inorganic layer by a film-forming method selected from the group consisting of dry film-forming methods and wet film-forming methods. Examples of dry film-forming methods include physical vapor deposition and chemical vapor deposition methods, and examples of wet film-forming methods include coating methods. From the viewpoint of the ease of forming a metal-containing layer of a thin film with excellent film thickness uniformity, the dry film-forming method is preferable as the film-forming method of the above metal-containing layer, and the physical vapor deposition method is more preferable. Examples of physical vapor deposition methods include vapor deposition methods. Hereinafter, taking the vapor deposition method as an example, the method for forming the metal-containing layer will be described. However, the metal-containing layer is not limited to the film-forming methods exemplified below.

[0015] To form the metal-containing layer, one or more vapor deposition sources can be used, two or more vapor deposition sources can also be used, and two, three, or four vapor deposition sources can be used. The total number of vapor deposition sources used can be, for example, five or less. When the number of vapor deposition sources used is one, as the one vapor deposition source, a vapor deposition source containing the first metal and the second metal can be used. Also, when two or more vapor deposition sources are used, in one form, one or more vapor deposition sources containing only the first metal among the first metal and the second metal and one or more vapor deposition sources containing only the second metal can be used in combination, and in another form, two or more vapor deposition sources containing the first metal and the second metal can be used in combination.

[0016] The vapor deposition source containing the first metal and / or the second metal can be produced, for example, by the following method. Prepare a solution containing particles of silver, which is the first metal (hereinafter also referred to as "the solution of the first metal"). Such a solution can be, for example, an aqueous solution or a water dispersion of silver particles. The concentration of silver particles in the solution of the first metal can be, for example, in the range of 1000 to 10000 ppm. In the present invention and this specification, ppm is based on mass. Separate from the above solution, prepare a solution containing one or more kinds of particles of a second metal (hereinafter also referred to as "the solution of the second metal"). Such a solution can be, for example, an aqueous solution and can be an aqueous dispersion of particles of the second metal. Also, as the solution of the second metal, only one kind of solution containing one or more kinds of particles of the second metal can be used, or two or more kinds of solutions containing one or more kinds of particles of the second metal can be used. In any case, the concentration of the particles of the second metal in the solution of the second metal can be, for example, in the range of 1000 to 10000 ppm. Here, when the solution of the second metal contains two or more kinds of particles of the second metal, the above concentration refers to the concentration of the total of those two or more kinds of metal particles. As each of the above solutions, for example, commercially available products that are commercially available as aqueous dispersions of metal particles can be used as they are, or commercially available products can be diluted and used. After thus preparing the above solution, impregnate the carrier with the above solution. The above plurality of kinds of solutions may be impregnated into the carrier separately, simultaneously, or a mixed solution obtained by mixing a plurality of kinds of solutions may be impregnated into the carrier. The liquid volume of the solution of the first metal to be impregnated into the carrier can be, for example, in the range of 0.1 to 5.0 ml. The liquid volume of the solution of the second metal to be impregnated into the carrier can be, for example, in the range of 0.1 to 5.0 ml. Also, when the first metal and the second metal are supported on the same carrier, the liquid volume of the solution of the second metal can be in the range of 0.1 to 5 times the liquid volume of the solution of the first metal. Here, when two or more kinds of solutions are used as the solution of the second metal, the above liquid volume refers to the total liquid volume of those two or more kinds of solutions. Examples of the method of impregnating the carrier with the solution include a method of injecting or spraying the solution onto the carrier and a method of immersing the carrier in the solution. Also, the above carrier can be, for example, a porous body and can be made of, for example, metal, alloy, or ceramic. Specific examples of the porous body include sintered filters. The sintered filter can be a sintered body obtained by sintering powder materials such as metal powder, alloy powder, and ceramic powder. After impregnating the carrier with the above solution and then performing a drying treatment by a known method, the particles of the first metal and the particles of the second metal can be supported on the carrier.

[0017] The particle size of each of the above metal particles can be, for example, 1 nm or more and 10 nm or less, or 1 nm or more and 5 nm or less.

[0018] In one form, the vapor deposition method for forming the above metal-containing layer can be a thermal vapor deposition method. The thermal vapor deposition method is a method of heating and vaporizing a vapor deposition material by heating the internal atmosphere of the vapor deposition apparatus by heating means (such as a heater) arranged in the vapor deposition apparatus. When using a plurality of vapor deposition sources in film formation by the thermal vapor deposition method, the temperature profiles for heating the plurality of vapor deposition sources can be the same in one form and different temperature profiles in another form. The present inventor considers that heating a plurality of vapor deposition sources with different temperature profiles is preferable from the viewpoint of suppressing the occurrence of bias in the distribution of various components in the formed layer. Specifically, it is as follows. For example, the water-repellent component described later usually has a different vaporization temperature from the metal component. The metal component is a component containing one or more metals, and the metal component for forming the above metal-containing layer is a component containing the first metal and / or the second metal. In vapor deposition by heating with a single temperature profile, it is considered that during the temperature rise, the water-repellent component that vaporizes at a lower temperature mainly vaporizes and deposits first, and then the metal component that vaporizes at a higher temperature mainly vaporizes and deposits. When the metal component and the water-repellent component are deposited in this way to form a metal-containing layer, a bias occurs in the distribution of the metal component and the water-repellent component in the water-repellent layer, and it is considered that the water repellency that the spectacle lens can exhibit due to the inclusion of this component decreases for the water-repellent component unevenly distributed inside the water-repellent layer. On the other hand, it is presumed that the durability of the performance exhibited by the metal component unevenly distributed in the surface layer portion is low. On the other hand, in film formation by the thermal evaporation method, when a plurality of evaporation sources are heated with different temperature profiles, it is considered that the uneven distribution of the metal component and the water-repellent component in the formed layer can be reduced. The present inventor conjectures that this is preferable for providing spectacle lenses that can exhibit the performance exhibited by the water-repellent and metal components, for example, even after the surface is rubbed and worn due to long-term use.

[0019] By including a water-repellent component in the metal-containing layer, this layer can function as a water-repellent layer. In the present invention and this specification, the "water-repellent layer" refers to a layer that contributes to the water-repellent property of the spectacle lens surface or contributes to exhibiting better water-repellent property compared to the case where this layer is not present. The "water-repellent component" refers to a component that contributes to the water-repellent property of the surface of the layer containing this component or contributes to exhibiting better water-repellent property compared to the case where this component is not contained.

[0020] Examples of the water-repellent component include fluorine-containing components. Examples of the form of fluorine in the fluorine-containing component include the form of an inorganic compound or an organic compound, and the form of an organic compound is preferable. That is, as one form of the water-repellent component, fluorine-containing organic compounds can be mentioned.

[0021] An example of the fluorine-containing organic compound includes metaxylene hexafluoride (C6H4(CF3)2) and the like.

[0022] In addition, examples of the fluorine-containing organic compound also include fluorine-containing organosilane compounds represented by the following general formula (1).

[0023]

Chemical formula

[0024] In the general formula (1) above, Rf is a linear or branched perfluoroalkyl group having 1 to 16 carbon atoms, preferably CF3-, C2F5-, C3F7-. R1 is a hydrolyzable group, and for example, a halogen atom, -OR3, -OCOR3, -OC(R3)=C(R4)2, -ON=C(R3)2, -ON=CR5 are preferred. More preferably, they are a chlorine atom, -OCH3, -OC2H5. Here, R3 is an aliphatic hydrocarbon group or an aromatic hydrocarbon group, R4 is a hydrogen atom or an aliphatic hydrocarbon group (for example, a lower aliphatic hydrocarbon group), and R5 is a divalent aliphatic hydrocarbon group having 3 to 6 carbon atoms. R2 is a hydrogen atom or a monovalent organic group. The above monovalent organic group is preferably an inert group. The above monovalent organic group is more preferably a monovalent hydrocarbon group having 1 to 4 carbon atoms. X is an iodine atom or a hydrogen atom, Y is a hydrogen atom or an alkyl group (for example, a lower alkyl group). Z is a fluorine atom or a trifluoromethyl group. a, b, c, d are each independently an integer in the range of 0 to 200, preferably an integer in the range of 1 to 50. e is 0 or 1. m, n are each independently an integer in the range of 0 to 2, preferably 0. p is an integer of 1 or more, preferably an integer in the range of 1 to 10.

[0025] Also, the molecular weight (weight average molecular weight Mw) of the fluorine-containing organosilane compound represented by the general formula (1) is not particularly limited. For example, it can be in the range of 5×10 2 ~1×10 5 or in the range of 5×10 2 ~1×10 4

[0026] In addition, in one form, the fluorine-containing organosilane compound represented by the general formula (1) can be a fluorine-containing organosilane compound represented by the following general formula (2).

[0027]

Chemical formula

[0028] ​In the general formula (2) above, R1, Y, and m have the same meanings as in the general formula (1). q is an integer in the range of 1 to 50, and r is an integer in the range of 1 to 10.

[0029] In order to form a metal-containing layer containing a water-repellent component, for example, a vapor deposition method using a vapor deposition source containing a water-repellent component can be adopted. The vapor deposition method can be, for example, a thermal vapor deposition method. In order to support the water-repellent component on the carrier of the vapor deposition source, for example, a commercially available liquid water repellent can be used as it is or after dilution to impregnate the carrier. The amount of liquid impregnated into the carrier can be, for example, in the range of 0.10 to 5.00 ml. After impregnation, the water-repellent component can be supported on the carrier by performing a drying treatment by a known method.

[0030] When forming the metal-containing layer by thermal vapor deposition, when heating a plurality of vapor deposition sources with different temperature profiles, when three or more vapor deposition sources are used, at least two of the vapor deposition sources need to have different temperature profiles, and it is possible that two or more of the three or more vapor deposition sources are heated with the same temperature profile.

[0031] The heating of a plurality of vapor deposition sources can be performed in one form within one chamber. For example, one vacuum vapor deposition apparatus can be used, and a plurality of vapor deposition sources can be arranged in the vacuum chamber of this apparatus to deposit a vapor deposition material on the surface to be formed.

[0032] Figure 1 is a schematic diagram for explaining an example of a method for forming a metal-containing layer by thermal vapor deposition. In Figure 1, 2A and 2B are vapor deposition sources, 3A and 3B are heaters, 11 is a lens substrate, and 14 is a formed water-repellent layer.

[0033] The pressure in the chamber during film formation may be determined according to the type of vapor deposition material. For example, it can be 2×10 -2 Pa or less.

[0034] As the heaters 3A and 3B, for example, a halogen heater or the like can be used. The temperature profiles of the heater 3A for heating the vapor deposition source 2A and the heater 3B for heating the vapor deposition source 2B are made different temperature profiles. The temperature profile can be set in a control unit provided in the vacuum vapor deposition apparatus. The plurality of different temperature profiles can be those in which one or more heating parameters selected from the group consisting of a heating rate, a heating start time, and a heating end time are different.

[0035] Specific examples of the temperature profiles of the heaters 3A and 3B are shown in FIGS. 2 to 4.

[0036] Specific example 1 shown in FIG. 2 is an example in which the heating rates are different in the temperature profiles of the two heaters. For example, when the vapor deposition source 2A heated by the heater 3A contains a water-repellent component, the vapor deposition source 2B heated by the heater 3B contains a metal component, and the water-repellent component is a component that is more easily vaporized at a lower temperature than the metal component, by providing a period in which the heating rate of the heater 3A is slower than the heating rate of the heater 3B, the period in which the metal component is vaporized and the period in which the water-repellent component is vaporized can be made to be about the same period, or the difference between those periods can be made smaller. Note that the heating rate of heating by each heater can be the same heating rate from the start to the end of heating in one form, and can be changed in two or more stages from the start to the end of heating in another form.

[0037] Specific example 2 shown in FIG. 3 is an example in which the heating rates and the heating end times are different in the temperature profiles of the two heaters. For example, when the vapor deposition source 2A heated by the heater 3A contains a water-repellent component, the vapor deposition source 2B heated by the heater 3B contains a metal component, and the water-repellent component is a component that is more easily vaporized at a lower temperature than the metal component, by providing a period in which the heating rate of the heater 3A is slower than the heating rate of the heater 3B and ending the heating of the heater 3B earlier than the heating of the heater A, the period in which the metal component is vaporized and the period in which the water-repellent component is vaporized can be made to be about the same period, or the difference between those periods can be made smaller.

[0038] Specific Example 3 shown in FIG. 4 is an example in which the heating start time and the heating rate are different in the temperature profiles of two heaters. For example, when both the vapor deposition source 2A heated by the heater 3A and the vapor deposition source 2B heated by the heater 3B contain a metal component and a water-repellent component, according to Specific Example 3, the period during which the water-repellent component vaporizes from the vapor deposition source 2A and the period during which the water-repellent component vaporizes from the vapor deposition source 2B can be made different, and the period during which the metal component vaporizes from the vapor deposition source 2A and the period during which the metal component vaporizes from the vapor deposition source 2B can be made different. Therefore, the bias in the distribution of the water-repellent component and the metal component in the formed water-repellent layer can be reduced.

[0039] However, Specific Examples 1 to 3 are illustrative, and the present invention is not limited to such illustrations.

[0040] The maximum temperature reached during heating in the temperature profile may be determined according to the type of vapor deposition material. For example, it can be 100°C or higher and 750°C or lower, but it is not limited to this range.

[0041] The film thickness of the metal-containing layer thus formed can be, for example, 30 nm or less, 25 nm or less, 20 nm or less, or 15 nm or less. The film thickness of the metal-containing layer can be, for example, 5 nm or more or 10 nm or more. Also, when the metal-containing layer is a layer that can function as a water-repellent layer, the contact angle with respect to water on the surface of that layer can be, for example, 100° or more and 120° or less. The water-repellent layer can be provided, for example, as the outermost layer on one or both sides of the spectacle lens.

[0042] <Example of the layer structure of a spectacle lens> The above spectacle lens has the above metal-containing layer on the surface side opposite to the lens substrate of the inorganic layer. The above metal layer can be provided directly on the surface of the inorganic layer or indirectly via another layer.

[0043] FIG. 5 is a schematic cross-sectional view showing an example of the layer structure of the above-described spectacle lens. The spectacle lens 1 shown in FIG. 5 has a hard coat layer 12 on one surface 11a (for example, the object side surface) of a lens substrate 11, and a multilayer film 13 thereon. The multilayer film 13 is an alternately laminated film of a low refractive index layer 13L and a high refractive index layer 13H. A metal-containing layer 14 is provided on the surface of the multilayer film. The metal-containing layer 14 can function as an antibacterial layer, and can further function as a water-repellent layer by containing a water-repellent component.

[0044] <Lens substrate> The lens substrate of the spectacle lens can be a plastic lens substrate or a glass lens substrate. The glass lens substrate can be, for example, a lens substrate made of inorganic glass. From the viewpoint of being lightweight, difficult to break, and easy to handle, a plastic lens substrate is preferred as the lens substrate. Examples of the plastic lens substrate include styrene resins such as (meth)acrylic resins, polycarbonate resins, allyl resins, allyl carbonate resins such as diethylene glycol bisallyl carbonate resin (CR-39), vinyl resins, polyester resins, polyether resins, urethane resins obtained by reacting an isocyanate compound with a hydroxy compound such as diethylene glycol, thiourethane resins obtained by reacting an isocyanate compound with a polythiol compound, and cured products of curable compositions containing (thio)epoxy compounds having one or more disulfide bonds in the molecule (generally called transparent resins). As the lens substrate, an undyed one (colorless lens) may be used, or a dyed one (dyed lens) may be used. The refractive index of the lens substrate can be, for example, about 1.60 to 1.75. However, the refractive index of the lens substrate is not limited to the above range, and may be above or below the above range within the above range. In the present invention and this specification, the refractive index refers to the refractive index with respect to light having a wavelength of 500 nm. Further, the lens substrate may be a lens having a refractive power (so-called powered lens), or a lens having no refractive power (so-called non-powered lens).

[0045] The spectacle lens can be various lenses such as a single-focus lens, a multi-focus lens, and a progressive power lens. The type of lens is determined by the surface shapes of both sides of the lens substrate. Also, the surface of the lens substrate may be any of a convex surface, a concave surface, and a flat surface. In a normal lens substrate and spectacle lens, the surface on the object side is convex and the surface on the eyeball side is concave. However, the present invention is not limited thereto.

[0046] <Inorganic layer> The above spectacle lens has an inorganic layer on the lens substrate. In the present invention and this specification, the "inorganic layer" is a layer containing an inorganic substance, preferably a layer containing an inorganic substance as a main component. Here, the main component is the component that occupies the most in the layer, and usually occupies about 50% by mass to 100% by mass, and further about 90% by mass to 100% by mass of the mass of the layer. The same applies to the main components described later. The inorganic layer can be a layer directly laminated on the surface of the lens substrate, or can be a layer indirectly laminated on the surface of the lens substrate via one or more other layers. Examples of the above other layers include one or more known layers such as a cured layer of a curable composition generally called a hard coat layer and a primer layer provided for improving adhesion. The types and film thicknesses of these layers are not particularly limited and can be determined according to the functions and optical characteristics desired for the spectacle lens.

[0047] In one form, the inorganic layer can be a multilayer film of two or more inorganic layers. When the inorganic layer is a multilayer film, the metal-containing layer is provided on the uppermost inorganic layer of the multilayer film (i.e., the inorganic layer at the position farthest from the lens substrate). Examples of such a multilayer film include a multilayer film containing at least one high refractive index layer and at least one low refractive index layer. Such a multilayer film can be an antireflection film having the property of preventing reflection of light of a specific wavelength or light in a specific wavelength range, or a reflection film having the property of reflecting light of a specific wavelength or light in a specific wavelength range. Such an inorganic layer is, for example, the multilayer film 13 shown in FIG. 5. In the present invention and this specification, the terms "high" and "low" regarding "high refractive index" and "low refractive index" are relative notations. That is, the high refractive index layer refers to a layer having a higher refractive index than the low refractive index layer contained in the same multilayer film. In other words, the low refractive index layer refers to a layer having a lower refractive index than the high refractive index layer contained in the same multilayer film. The refractive index of the high refractive index material constituting the high refractive index layer is, for example, 1.60 or more (for example, in the range of 1.60 to 2.40), and the refractive index of the low refractive index material constituting the low refractive index layer can be, for example, 1.59 or less (for example, in the range of 1.37 to 1.59). However, as described above, since the notations "high" and "low" regarding the high refractive index and the low refractive index are relative, the refractive indices of the high refractive index material and the low refractive index material are not limited to the above ranges.

[0048] Specifically, examples of the high refractive index material for forming the high refractive index layer include one or more mixtures of oxides selected from the group consisting of zirconium oxide (e.g., ZrO2), tantalum oxide (e.g., Ta2O5), titanium oxide (e.g., TiO2), aluminum oxide (e.g., Al2O3), yttrium oxide (e.g., Y2O3), hafnium oxide (e.g., HfO2), and niobium oxide (e.g., Nb2O5). On the other hand, examples of the low refractive index material for forming the low refractive index layer include one or more mixtures of oxides or fluorides selected from the group consisting of silicon oxide (e.g., SiO2), magnesium fluoride (e.g., MgF2), and barium fluoride (e.g., BaF2). In the above examples, for convenience, the oxides and fluorides are shown in the stoichiometric composition, but those in a state where oxygen or fluorine is deficient or excessive from the stoichiometric composition can also be used as the high refractive index material or the low refractive index material.

[0049] Preferably, the high refractive index layer is a film mainly composed of a high refractive index material, and the low refractive index layer is a film mainly composed of a low refractive index material. By forming a film using a film-forming material (for example, a vapor deposition material) mainly composed of the high refractive index material or the low refractive index material, such a film (for example, a vapor deposition film) can be formed. The film and the film-forming material may inevitably contain impurities, and may also contain other components, for example, other inorganic substances or known additive components that play a role in assisting film formation, as long as the functions of the main components are not impaired. Film formation can be performed by a known film-forming method. From the viewpoint of ease of film formation, it is preferably performed by vapor deposition, and more preferably by vacuum vapor deposition. The antireflection film can be, for example, a multilayer film in which a high refractive index layer and a low refractive index layer are alternately laminated a total of 3 to 10 layers. The film thickness of the high refractive index layer and the film thickness of the low refractive index layer can be determined according to the layer configuration. Specifically, the combination of layers included in the multilayer film and the film thickness of each layer are determined by optical design simulation by a known method based on the refractive index of the film-forming material for forming the high refractive index layer and the low refractive index layer, and the desired reflection characteristics and transmission characteristics to be brought to the spectacle lens by providing the multilayer film. In addition, the multilayer film may contain one or more layers of a vapor deposition film of a conductive oxide (conductive oxide layer), preferably a vapor deposition film of a conductive oxide formed by vapor deposition using a vapor deposition material mainly composed of a conductive oxide, at an arbitrary position. The film thickness of each layer of the high refractive index layer and the low refractive index layer included in the multilayer film can be, for example, 3 to 500 nm, and the total thickness of the multilayer film can be, for example, 100 to 900 nm. The film thickness in the present invention and this specification is the physical film thickness.

[0050] In the above spectacle lens, the metal-containing layer is provided on the surface of the inorganic layer. The metal-containing layer can be a layer directly laminated on the surface of the inorganic layer, or can be a layer indirectly laminated on the surface of the inorganic layer via one or more other layers. For other layers, reference can be made to the previous description.

[0051] The laminate including the inorganic layer and the metal-containing layer can be formed on at least one surface of the lens substrate, and can also be formed on both surfaces. For example, the laminate can be located on the object side of the spectacle lens, can also be located on the eyeball side of the spectacle lens, and can also be located on both the object side and the eyeball side of the spectacle lens. When the laminate is located on both sides of the spectacle lens, the laminate on the object side and the laminate on the eyeball side can be the same laminate or different laminates. In the present invention and this specification, the "eyeball side" refers to the surface side located on the eyeball side when the glasses equipped with the spectacle lens are worn by the wearer. The "object side" refers to the opposite surface side, that is, the surface side located on the object side when the glasses equipped with the spectacle lens are worn by the wearer.

[0052] In the above spectacle lens, the metal-containing layer can function as an antibacterial layer, and thus can exhibit antibacterial properties. Further, when the metal-containing layer is also a layer that can function as a water-repellent layer, the spectacle lens can also exhibit water-repellent properties, thereby, for example, preventing water haze of the lens. The inorganic layer can provide the spectacle lens with antireflection performance for light of a specific wavelength or light in a specific wavelength range by functioning as, for example, an antireflection film.

[0053] [Glasses] One aspect of the present invention relates to glasses equipped with the above spectacle lens. Details of the spectacle lens included in these glasses are as described above. Regarding the above glasses, known techniques can be applied to the configuration such as the frame.

Examples

[0054] Hereinafter, the present invention will be further described with reference to examples. However, the present invention is not limited to the embodiments shown in the examples.

[0055] Hereinafter, the SiO2 layer is a vapor deposition film formed using silicon oxide as a vapor deposition material, and the ZrO2 layer is a vapor deposition film formed using zirconium oxide as a vapor deposition material. Each vapor deposition material consists only of the described oxide, excluding unavoidably mixed impurities.

[0056] [Example 1] [Fabrication of a lens substrate with a hard coat layer] A hard coat liquid containing inorganic oxide particles and a silicon compound was spin-coated on the entire object-side surface (convex surface) of a plastic lens substrate manufactured from a monomer for spectacle lenses (MR8 manufactured by Mitsui Chemicals, Inc.), and heat-cured in a heating furnace at a furnace temperature of 100 °C for 60 minutes to form a single-layer hard coat layer with a film thickness of 3 μm.

[0057] [Fabrication of a multilayer antireflection film] Next, the lens substrate formed with the hard coat layer was placed in a vacuum vapor deposition apparatus, and a multilayer antireflection film with a total of 7 layers (total thickness: approximately 400 - 600 nm) of "SiO2 layer / ZrO2 layer / SiO2 layer / ZrO2 layer / SiO2 layer / ZrO2 layer / SiO2 layer" was formed on the entire surface of the hard coat layer by vacuum vapor deposition. The notation " / " indicates that the part described to the left of " / " and the part described to the right are directly laminated. This is the same in the following descriptions. Thus, a spectacle lens having a layer structure of "lens substrate / hard coat layer / multilayer antireflection film (inorganic layer)" was fabricated.

[0058] [Film formation of a water-repellent layer] (Fabrication of a vapor deposition source) As a solution of a water-repellent component, a water-repellent agent manufactured by Shin-Etsu Silicone Co., Ltd. (trade name: KY-130, containing a fluorine-containing organosilane compound) was used. As a solution of the first metal component, an aqueous dispersion containing silver particles with a particle size of 2 - 5 nm at a concentration of 5000 ppm was prepared. As a solution of the second metal component, an aqueous dispersion containing platinum particles with a particle size of 2 - 5 nm at a concentration of 5000 ppm was prepared. As a carrier for the evaporation source, a disk-shaped sintered filter (material: SUS) with a diameter of 18 mm was used, and two evaporation sources were produced by the following method. The carrier injected with the solution of the water-repellent component in the amount shown in Table 1 was dried in a drying furnace at an internal temperature of 50 °C for 1 hour. After the above drying treatment, the carrier was injected with the solution of the metal component containing the first metal in the amount shown in Table 1 and then dried in a drying furnace at an internal temperature of 50 °C for 1 hour. After the above drying treatment, the carrier was injected with the solution of the metal component containing the second metal in the amount shown in Table 1 and then dried in a drying furnace at an internal temperature of 50 °C for 1 hour. Thus, two evaporation sources in which the water-repellent component, the first metal (Ag) component, and the second metal (Pt) component were supported on the carrier were produced.

[0059] (Film formation of the water-repellent layer by the heat evaporation method) As shown in Fig. 1, the spectacle lens with the above multilayer antireflection film formed and the above evaporation source were arranged in the vacuum chamber of the vacuum evaporation apparatus. The two evaporation sources produced above were arranged as evaporation sources 2A and 2B. Each evaporation source was placed on a molybdenum boat (not shown in Fig. 1) and arranged in the vacuum chamber. The pressure in the vacuum chamber was 2×10 -2 Pa or less, and the heaters 3A and 3B (both halogen heaters) were heated according to the temperature profile of Specific Example 3 in Fig. 4. Specifically, in the temperature profile of heater 3A, the temperature was raised to 600 °C over 1 minute and 30 seconds, and then raised from 600 °C to 650 °C over 4 minutes and 30 seconds. In the temperature profile of heater 3B, the heating start time was 1 minute and 30 seconds later than the heating start time of heater 3A. After the temperature was raised to 600 °C over 2 minutes, the temperature was raised from 600 °C to 650 °C over 4 minutes. By heating in this way, the water-repellent component, the first metal component, and the second metal component can be heated and vaporized, and a vapor deposition film in which the water-repellent component, the first metal component, and the second metal component are deposited can be formed on the surface of the above multilayer antireflection film. As described above, a water-repellent layer with a film thickness of 10 - 20 nm containing the water-repellent component and the above two metal components was formed on the surface of the above multilayer antireflection film.

[0060] By the above process, the spectacle lens of Example 1 having a layer structure of "lens substrate / hard coat layer / multilayer antireflection film (inorganic layer) / water-repellent layer (metal-containing layer)" was produced.

[0061] [Comparative Example 1] The spectacle lens of Example 2 was produced by the method described for Example 1, except that the solution of the second metal component was not used when preparing the evaporation source.

[0062] Table 1 shows the amounts of various liquids injected into the carrier during the production of the evaporation source for Example 1 and Comparative Example 1.

[0063] [Antibacterial test] The antibacterial test was carried out in accordance with JIS Z 2801:2012. In the antibacterial tests of the spectacle lenses of Example 1 and Comparative Example 1, spectacle lenses produced in the same manner as the spectacle lenses of each Example or Comparative Example, except that the above metal-containing layer was not formed, were used as reference samples. Regarding the light resistance of antibacterial properties, after performing the light resistance test of Category 1 described in the chapter on light resistance tests of the durability test method (2018 edition) of the Society of Antibacterial Products Technology Agreement (SIAA) on test pieces cut out from each spectacle lens, the antibacterial properties were evaluated by the following method. Regarding the water resistance of antibacterial properties, after performing the water resistance test of Category 1 described in the chapter on water resistance tests of the durability test method (2018 edition) of the Society of Antibacterial Products Technology Agreement (SIAA) on test pieces cut out from each spectacle lens, the antibacterial properties were evaluated by the following method. After placing test pieces of 50 mm × 50 mm (test pieces cut out from each spectacle lens of the Examples and Comparative Examples and their reference samples) in a sterilized petri dish, 0.4 mL of a bacterial solution containing 1.0×10 5 to 4.0×10 5 test bacteria (Staphylococcus aureus or Escherichia coli) was dropped onto the center of the test piece and covered with a polyethylene film cut to 40 mm × 40 mm. After culturing this petri dish at a relative humidity of 90% or more for 24 hours, the viable cell count per 1 cm 2 was measured, and the following antibacterial activity value was calculated. Antibacterial activity value = Ut - At ≧ 2.0 Ut: Average value of the logarithm of the viable cell count per 1 cm after 24-hour culture of the unprocessed test piece (reference sample) 2 At: Average value of the logarithm of the viable cell count per 1 cm after 24-hour culture of the antibacterial processed test piece (sample of the example or comparative example) 2 The SIAA (Antibacterial Products Technology Council) stipulates that if the antibacterial activity value is 2 or more, the product has an antibacterial effect. Therefore, for each of the spectacle lenses of Example 1 and Comparative Example 1, the antibacterial property after the light resistance test or the water resistance test was determined according to the following criteria from the value of the antibacterial activity value obtained above. OK: Antibacterial activity value is 2.0 or more NG: Antibacterial activity value is less than 2.0

[0064] The above results are shown in Table 2.

[0065]

Table 1

[0066]

Table 2

[0067] From the results shown in Table 1, it can be confirmed that the spectacle lens of Example 1 having a metal-containing layer containing the second metal together with the first metal is superior in light resistance and water resistance of antibacterial property compared to the spectacle lens of Comparative Example 1 not containing the second metal in the metal-containing layer.

[0068] [Measurement of contact angle before and after friction and wear treatment] For the spectacle lens of Example 1, the contact angle of the spectacle lens without friction and wear treatment (initial) and after friction and wear treatment was measured by the following method. The initial contact angle was 108 degrees, and the contact angle after friction and wear treatment was 106 degrees. From this result, it can be confirmed that the spectacle lens of Example 1 has a large contact angle value and excellent water repellency in both the initial and after friction and wear treatment. ​​

[0069] (Friction and wear treatment) The friction and wear treatment was carried out by the following method. As a friction and wear member, a lens wiping paper (Dasper manufactured by Otsu Sangyo Co., Ltd.) was wound around a rubber eraser cut into a size of 19 mm × 24 mm, and it was attached to a reciprocating friction and wear tester (Tribogear 30S manufactured by Yamato Scientific Co., Ltd.). The water-repellent layer surface of the spectacle lens was rubbed back and forth 5000 times with the friction and wear member under a load of 2 kg.

[0070] (Measurement of contact angle) Using a CA-D type manufactured by Kyowa Interface Science Co., Ltd. as a contact angle meter, a water droplet with a diameter of 2 mm was formed at the tip of a needle in a measurement environment with an ambient temperature of 25°C, and this was brought into contact with the uppermost part of the convex surface of the metal-containing layer of the spectacle lens to form a liquid droplet. The angle between the liquid droplet and the surface generated at this time was measured and taken as the static contact angle. The measurement of the contact angle was performed within 10 seconds after bringing the water droplet into contact with the spectacle lens in order to minimize the measurement error due to the evaporation of water. The static contact angle θ is obtained by the following formula, where r is the radius of the water droplet (the radius of the part where the water droplet is in contact with the spectacle lens surface) and h is the height of the water droplet. θ = 2 × tan− 1 (h / r)

[0071] Finally, the above aspects are summarized.

[0072] According to one aspect, there is provided a spectacle lens having a lens substrate and an inorganic layer, further having a metal-containing layer on the surface side opposite to the lens substrate of the inorganic layer, the metal contained in the metal-containing layer including a first metal and a second metal, the first metal being silver, and the second metal being one or more metals selected from the group consisting of cobalt, nickel, zinc, copper, zirconium, molybdenum, lead, platinum, gold, and palladium.

[0073] The above spectacle lens can be a spectacle lens excellent in antibacterial properties, light resistance, and water resistance.

[0074] In one form, the second metal can be one or more metals selected from the group consisting of zirconium, platinum, gold, and palladium.

[0075] In one form, the second metal can include platinum.

[0076] In one form, the inorganic layer can be a multilayer film of two or more inorganic layers.

[0077] In one form, the metal-containing layer can be a water-repellent layer.

[0078] In one form, the water-repellent layer can include a fluorine-based organic compound.

[0079] According to one aspect, there is provided a method for manufacturing the spectacle lens, including forming the metal-containing layer by a heat evaporation method, and the film formation by the heat evaporation method includes heating a plurality of evaporation sources with different temperature profiles.

[0080] In one form, in the different temperature profiles, one or more heating parameters selected from the group consisting of a heating rate, a heating start time, and a heating end time can be different.

[0081] According to one aspect, there is provided a pair of spectacles including the spectacle lens.

[0082] Each of the various aspects and forms described in this specification can be combined in any combination of two or more.

[0083] It should be considered that all the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims are included.

Industrial Applicability

[0084] One aspect of the present invention is useful in the fields of manufacturing spectacle lenses and spectacles.

Claims

1. A method for manufacturing an ophthalmic lens, wherein the ophthalmic lens is an ophthalmic lens having a lens substrate and an inorganic layer, the ophthalmic lens further has a metal-containing layer as the outermost layer on the surface side opposite to the lens substrate of the inorganic layer, the metal-containing layer is a vapor-deposited film, the metal contained in the metal-containing layer includes a first metal and a second metal, the first metal is silver, the second metal is at least one metal selected from the group consisting of platinum, gold, and palladium, in the metal-containing layer, part or all of the first metal exists in the form of a metal simple substance or an alloy, the method for manufacturing the ophthalmic lens includes forming the metal-containing layer by a heat vapor deposition method, the film formation by the heat vapor deposition method includes heating a vapor deposition source A containing a metal component and a fluorine-based organic compound with a heater A, and heating a vapor deposition source B containing a metal component and a fluorine-based organic compound with a heater B, and the heating start time and the heating rate of the heater A are different from the heating start time and the heating rate of the heater B, wherein the metal component includes a metal component containing the first metal and a metal component containing the second metal. The method for manufacturing the ophthalmic lens 2. The method for manufacturing an ophthalmic lens according to claim 1, wherein the inorganic layer is a multilayer film of two or more inorganic layers.

3. The method for manufacturing an ophthalmic lens according to claim 1 or 2, wherein the metal-containing layer is a water-repellent layer.

4. The method for manufacturing an ophthalmic lens according to claim 3, wherein the water-repellent layer contains a fluorine-based organic compound.

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