JP6288366B2 - Laminated body for eyeglass lens, eyeglass lens with laminated body, and marking method - Google Patents

Description

  The present invention relates to a laminated body for spectacle lenses, a spectacle lens with a laminated body, and a marking method.

  Lenses such as eyeglasses and sunglasses are made of a light-transmitting material such as a resin material or a glass material. A protective film having optical transparency is attached to the front surface of the spectacle lens and used (for example, see Patent Document 1).

  Such a protective film may be printed (marked) with a logo such as a company name by inkjet printing or laser irradiation, for example. This print is a color different from the colors of the protective film and the spectacle lens.

  However, in such a configuration, since the printed portion is located on the front side of the protective film, the print may be lost due to friction or the like as the glasses are used.

Japanese Patent Laid-Open No. 5-34648

  An object of the present invention is to provide a spectacle lens laminate and a spectacle lens with a laminate capable of preventing the printed portion of the color developing layer from disappearing. Another object of the present invention is to provide a marking method for efficiently marking a spectacle lens laminate and a spectacle lens with a laminate.

Such an object is achieved by the present inventions (1) to ( 6 ) below.
(1) A laminated body for spectacle lenses that has flexibility and is arranged and used on a curved surface on the front side of the spectacle lens in a state of being deformed following the curved shape ,
A light transmissive layer having light transparency;
A color-forming layer provided on the back side of the light-transmitting layer and containing a color-forming material that develops color upon irradiation with energy rays;
A polarizing layer provided on the back side of the coloring layer, and polarizing incident light incident through the light-transmitting layer and the coloring layer;
The visible light transmittance in the polarizing layer is lower than the visible light transmittance in the coloring layer,
The colored material that has developed color is different from the hue of the polarizing layer ,
The color developing layer includes a first color developing layer and a second color developing layer provided on the back side of the first color developing layer, the second color developing layer having a hue different from that of the first color developing layer,
The visible light transmittance in the second coloring layer is lower than the visible light transmittance in the first coloring layer .

  (2) The eyeglass lens laminate according to (1), wherein the coloring material includes at least one of a bismuth compound, a phthalocyanine compound, a naphthalocyanine compound, and an anthraquinone compound.

( 3 ) The above (1) or (2) , further comprising a bonding layer that has light transmittance, is provided on the back side of the coloring layer, and bonds the spectacle lens laminate to the spectacle lens. The laminated body for spectacle lenses described in 1.

( 4 ) A spectacle lens with a laminate including a spectacle lens having a curved surface on the front side and a laminate for spectacle lenses disposed on the curved surface ,
The laminated body for spectacle lenses includes a light-transmitting layer having a light-transmitting property, a color-forming layer provided on the back side of the light-transmitting layer and colored by irradiation with energy rays, and the back side of the color-forming layer A polarizing layer that polarizes incident light incident through the light-transmitting layer and the color-forming layer, and
The visible light transmittance in the polarizing layer is lower than the visible light transmittance in the coloring layer,
The colored material that has developed color is different from the hue of the polarizing layer ,
The color developing layer includes a first color developing layer and a second color developing layer provided on the back side of the first color developing layer, the second color developing layer having a hue different from that of the first color developing layer,
The eyeglass lens with a laminate , wherein a visible light transmittance in the second coloring layer is lower than a visible light transmittance in the first coloring layer .

( 5 ) preparing the eyeglass lens laminate according to any one of (1) to ( 4 );
The first coloring layer and the second coloring layer of the eyeglass lens laminate are irradiated with the energy rays through the light-transmitting layer to cause the coloring material to develop a color . And a step of marking the second coloring layer and the second coloring layer .

( 6 ) preparing the laminated spectacle lens according to ( 4 ) above;
The first coloring layer and the second coloring layer of the laminated spectacle lens are irradiated with the energy rays through the light-transmitting layer to cause the coloring material to develop a color . And a step of marking the second coloring layer and the second coloring layer .

  ADVANTAGE OF THE INVENTION According to this invention, the laminated body for spectacle lenses and the spectacle lens with a laminated body which can prevent that the printed part of the coloring layer lose | disappears can be obtained. Moreover, according to this invention, marking can also be efficiently given to the laminated body for spectacle lenses and the spectacle lens with a laminated body.

FIG. 1 is a perspective view of sunglasses provided with a laminated spectacle lens according to the present invention of the first embodiment. FIG. 2 is a cross-sectional view showing the laminated spectacle lens shown in FIG. FIG. 3 is a diagram illustrating a method of manufacturing the laminated spectacle lens shown in FIG. FIG. 4 is a diagram showing a method for manufacturing the laminated spectacle lens shown in FIG. FIG. 5 is a diagram showing a method for manufacturing the laminated spectacle lens shown in FIG. FIG. 6 is a diagram showing a method for manufacturing the laminated spectacle lens shown in FIG. FIG. 7: is sectional drawing which shows the spectacle lens with a laminated body which concerns on this invention of 2nd Embodiment.

  Hereinafter, the laminated body for eyeglass lenses, the eyeglass lens with laminated body, and the marking method of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment>
FIG. 1 is a perspective view of sunglasses provided with a laminated spectacle lens according to the present invention of the first embodiment. FIG. 2 is a cross-sectional view showing the laminated spectacle lens shown in FIG. 3-6 is a figure which shows the manufacturing method of the spectacle lens with a laminated body shown in FIG. 1 including the marking method based on this invention.

  1 to 3, the upper side is also referred to as “upper” or “upper”, and the lower side is also referred to as “lower” or “lower”. 1 to 3, when the sunglasses are worn on the user's head, the surface of the lens user's eye side is referred to as the back surface, and the opposite surface is also referred to as the front surface. That is, in FIGS. 2 to 4 (the same applies to FIG. 7), the upper surface is the “front surface” and the lower surface is the “back surface”.

  2 to 4 (the same applies to FIG. 7), the laminated spectacle lens is illustrated as a flat plate, but in actuality, the laminated spectacle lens is curved as shown in FIG. 5 and FIG. The shape is made. 2 to 4 (the same applies to FIG. 7), the laminated body for eyeglass lenses and the eyeglass lens with the laminated body are exaggerated in the thickness direction, but each member (each layer) is shown. The thickness relationship is very different from the actual relationship.

  As shown in FIG. 1, a sunglasses (glasses) 1 includes a frame 2 that is worn on the user's head and a laminated spectacle lens 3 that is fixed to the frame 2. In this specification, the “glasses lens” includes both a lens having a condensing function and a lens not having a condensing function.

  Further, the present invention is used not only in glasses having a function of protecting eyes from sunlight such as sunglasses, but also in goggles for swimming, skiing, motorcycles, etc., goggles for protecting eyes during welding, etc. Can do.

  As shown in FIG. 1, the frame 2 is a structure that is worn on the user's head, and includes a rim portion 21, a bridge portion 22, a temple portion 23 that is hung on the user's ear, and a nose pad portion. 24.

  Each rim portion 21 has a ring shape, and is a portion to which the laminated spectacle lens 3 is attached.

The bridge portion 22 is a portion that connects the rim portions 21 to each other.
Each temple portion 23 has a vine shape and is connected to the edge of the corresponding rim portion 21. These temple portions 23 are portions that are hung on the user's ear.

  The nose pad portion 24 is a portion that comes into contact with the nose of the user when the sunglasses 1 is worn on the user's head (wearing state). With these nose pad portions 24, the wearing state of the sunglasses 1 (frame 2) on the user's head can be stably maintained.

  The constituent material of the frame 2 is not particularly limited, and various metal materials, various resin materials, and the like can be used.

  The shape of the frame 2 is not limited to the illustrated shape as long as the frame 2 can be easily and reliably attached to the user's head.

  Each rim portion 21 is equipped with a laminated spectacle lens 3. Since the two laminated spectacle lenses 3 have the same configuration, the one laminated spectacle lens 3 will be representatively described below.

  As shown in FIG. 2, the spectacle lens 3 with a laminated body includes a spectacle lens 4 having optical transparency and an optical film (lamination for spectacle lens) attached (arranged) on the upper (front side) surface of the spectacle lens 4. Body) 5.

  As shown in FIG. 5 and the like, the spectacle lens 4 has a plate shape curved upward (outside). The spectacle lens 4 has a lens function of collecting incident light incident from above (outside).

  The constituent material of the spectacle lens 4 is not particularly limited as long as it has optical transparency. For example, various resins such as thermoplastic resins and curable resins (for example, thermosetting resins and photocurable resins). Examples thereof include materials, various glass materials, and various crystal materials.

  Examples of the resin material include polyolefin such as polyethylene, polypropylene, and ethylene-propylene copolymer, polyvinyl chloride, polystyrene, polyamide, polyimide, polycarbonate, poly- (4-methylpentene-1), ionomer, and acrylic resin. , Polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), etc. Polyester, polyether, polyetherketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, polysulfur , Polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, other fluororesins, epoxy resins, phenol resins, urea resins, melamine resins, silicone resins, Examples thereof include polyurethane and the like, and copolymers, blends, polymer alloys and the like containing these as a main component, and one or more of them can be used in combination.

  Examples of the glass material include soda glass, crystalline glass, quartz glass, lead glass, potassium glass, borosilicate glass, and alkali-free glass.

  Examples of the crystal material include sapphire and crystal.

  Moreover, the thickness of the spectacle lens 4 is not specifically limited, For example, it is preferable that they are 0.5 mm or more and 20.0 mm or less, and it is more preferable that they are 1.0 mm or more and 18.0 mm or less. The spectacle lens 4 having such a thickness can be reduced in weight while maintaining a relatively high strength.

Next, the optical film 5 will be described.
As shown in FIG. 2, the optical film 5 includes a coloring layer 51, a protective layer (light transmissive layer) 52, a polarizing layer 53, and bonding layers 54a and 54b. In the optical film 5, the bonding layer 54a, the polarizing layer 53, the bonding layer 54b, the coloring layer 51, and the protective layer 52 are laminated in this order from the lower side (back side).

  The coloring layer 51 includes a resin material 511 and a coloring material 512 mixed (filled) with the resin material 511.

  Although it does not specifically limit as the resin material 511, Acrylic resin, methacrylic resin, polycarbonate, polystyrene, cyclic ether resin such as epoxy resin or oxetane resin, polyamide, polyimide, polybenzoxazole, polysilane, polysilazane, Silicone resin, fluorine resin, polyurethane, polyolefin resin, polybutadiene, polyisoprene, polychloroprene, polyester such as PET and PBT, polyethylene succinate, polysulfone, polyether, benzocyclobutene resin and norbornene resin And the like, and one or more of them can be used in combination. In addition, when using combining 2 or more types of resin, these can be made into a polymer alloy, a polymer blend (mixture), a copolymer, etc.

  The coloring material 512 is a material that develops color (changes color) when irradiated with laser (energy rays) L. When the coloring material 512 is colored, printing (marking) can be formed on the coloring layer 51. The coloring material 512 is not particularly limited as long as it has the above function, and for example, coloring agents such as dyes and pigments, clays, and the like can be used.

  Specifically, the coloring material 512 includes metal compounds such as bismuth compounds, phthalocyanine compounds, naphthalocyanine compounds, anthraquinone compounds, copper compounds, molybdenum compounds, metal salts, inorganic lead compounds, and pearl luster. Examples thereof include pigments, silicon compounds, mica, mica coated with metals and / or metal oxides, kaolins, silica sand, diatomaceous earth, talc, etc., and one or more of these may be combined. Can be used.

  In addition, as a metal and / or metal oxide which coat | covers mica, antimony, tin, titanium oxide, tin dioxide etc. are mentioned, for example, These can be used 1 type or in combination of 2 or more types. . When two or more metals and / or metal oxides are used in combination, examples of these combinations include a combination of tin and antimony, a combination of tin, antimony, and titanium oxide. In this case, the film covering mica is composed of a single layer containing two or more metals and / or metal oxides even if each layer is composed of a plurality of layers composed of a metal or a metal oxide simple substance. May be.

  Among these, the coloring material 512 preferably includes at least one of a bismuth compound, a phthalocyanine compound, a naphthalocyanine compound, and an anthraquinone compound. Specific examples of the bismuth compound include, but are not particularly limited to, for example, bismuth nitrate such as bismuth oxide, bismuth nitrate, and bismuth oxynitrate, bismuth halides such as bismuth chloride, bismuth oxychloride, bismuth sulfate, Examples thereof include bismuth acetate, bismuth citrate, bismuth hydroxide, and bismuth titanate.

  Bismuth-based compounds are preferred because they can form clear prints because of their extremely high color developability upon irradiation with a laser (energy beam) L. Bismuth-based compounds are also preferable because they can suppress a reduction in visibility as a spectacle lens in a portion not irradiated with laser (energy rays) L. Among these, bismuth nitrate and bismuth hydroxide can be suitably used as the bismuth compound from the viewpoint of easy availability and low cost.

  Suitable examples of the copper compound include copper, copper oxide, copper halide, formic acid, citric acid, salicylic acid, lauric acid, oxalic acid, maleic acid and other organic acid copper, copper phosphate, hydroxyphosphate copper, and the like. Can be used.

  As the molybdenum-based compound, molybdenum, molybdenum dioxide, molybdenum trioxide, molybdenum chloride, and metal molybdate can be preferably used. Examples of the metal that forms the metal molybdate include potassium (K), zinc (Zn), calcium (Ca), nickel (Ni), bismuth (Bi), magnesium (Mg), and the like.

  In addition, phthalocyanine compounds, naphthalocyanine compounds, and anthraquinone compounds are preferable because they can form clear prints because they have extremely high color developability by laser (energy ray) L irradiation. Moreover, it is preferable also from the point that the visibility fall as a spectacle lens of the part which does not irradiate the laser (energy beam) L can be suppressed.

  The content of the coloring material 512 in the coloring layer 51 is preferably 0.01 wt% or more and 5 wt% or less, and more preferably 0.05 wt% or more and 2 wt% or less. When there is too much content of the coloring material 512, the manufacturing cost of the optical film 5 (eyeglass lens 3 with a laminated body) may become high. In this case, the visibility as a spectacle lens may be reduced. On the other hand, if the content of the coloring material 512 is too small, the color of the coloring layer 51 (printing color) after irradiation with the laser L may be insufficient.

  Further, the thickness (average thickness) of the coloring layer 51 is not particularly limited, but is preferably 1 μm or more and 500 μm or less, and more preferably 5 μm or more and 400 μm or less. If the color forming layer 51 is too thick, the absolute amount (filling amount) of the color forming material 512 to be used increases, and the manufacturing cost of the optical film 5 (the spectacle lens 3 with a laminated body) may increase. On the other hand, if the color forming layer 51 is too thin, depending on the content of the color forming material 512, etc., the degree of color development may be low, resulting in insufficient and unclear printing.

  Note that the color of the color-developing layer 51 (resin material 511) before irradiation with the laser L may be colorless, or any color such as red, blue, and yellow.

  These colors can be selected by selecting and mixing the kind of dye or pigment into the resin material 511. Examples of the dye include acid dyes, direct dyes, reactive dyes, and basic dyes, and one or two or more selected from these can be used in combination.

  Specific examples of the dye include C.I. I. Acid Yellow 17, 23, 42, 44, 79, 142, C.I. I. Acid Red 52, 80, 82, 249, 254, 289, C.I. I. Acid Blue 9, 45, 249, C.I. I. Acid Black 1, 2, 24, 94, C.I. I. Food Black 1, 2, C.I. I. Direct Yellow 1,12,24,33,50,55,58,86,132,142,144,173, C.I. I. Direct Red 1,4,9,80,81,225,227, C.I. I. Direct Blue 1, 2, 15, 71, 86, 87, 98, 165, 199, 202, C.I. I. Direct Black 19, 38, 51, 71, 154, 168, 171, 195, C.I. I. Reactive Red 14, 32, 55, 79, 249, C.I. I. Reactive black 3, 4, 35 etc. are mentioned.

  As shown in FIG. 2, the protective layer 52 is located on the outermost layer of the optical film 5 (the spectacle lens 3 with a laminated body) and constitutes the outermost layer of the optical film 5. For this reason, the protective layer 52 can protect the laminated spectacle lens 3, in particular, the coloring layer 51.

  The constituent material of the protective layer 52 is not particularly limited. For example, polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polyolefins such as polyethylene and polypropylene. Examples thereof include various resin materials such as resins, polyimide resins, polyamide resins, polycarbonate resins, acrylic resins such as polymethyl methacrylate, acetate resins, allyl resins, and silicone resins. Among these, as a constituent material of the protective layer 52, a material containing a polyamide resin, a polycarbonate resin, a polyurethane resin, or an acrylic resin as a main component is preferably used.

  The protective layer 52 composed of these constituent materials can surely protect the coloring layer 51.

  In particular, when the protective layer 52 having excellent heat resistance is obtained, it is preferable to use a polycarbonate resin, an allyl resin, a silicone resin, or the like.

  When obtaining the protective layer 52 excellent in impact resistance, it is preferable to use a polyamide resin, a polycarbonate resin, a polyurethane resin, or the like.

  When obtaining the protective layer 52 having excellent wear resistance, it is preferable to use an allyl resin, a silicone resin, a polyurethane resin, or the like.

  When obtaining the protective layer 52 having excellent weather resistance, it is preferable to use an acrylic resin, a silicone resin, or the like.

  When obtaining the protective layer 52 excellent in chemical resistance, it is preferable to use a polyamide resin or the like.

  The polarizing layer 53 is light that vibrates only in one predetermined direction (light having a polarization plane), that is, linearly polarized light, from incident light (unpolarized natural light and diffusely reflected light) incident through the protective layer 52 and the color forming layer 51. The function to take out. Thereby, the incident light that enters the eye through the laminated spectacle lens 3 is polarized. Usually, irregularly reflected light is present in an amount of about 10 times that of natural light and is incident on the eye from various directions, thereby causing glare in the field of view. Therefore, by greatly cutting unnecessary irregularly reflected light by the polarizing layer 53, glare generated in the field of view can be reduced, and a clear field of view can be ensured.

  In particular, in the present invention, the coloring layer 51 containing the coloring material 512 is separately provided on the upper side (front side) of the polarizing layer 53. Most of the incident light passes through the coloring layer 51, but a part of the incident light is reflected or scattered by the coloring material 512 in the coloring layer 51 and cannot pass through the coloring layer 51. The incident light that has passed through the coloring layer 51 is also polarized by the polarizing layer 53. Therefore, according to the present invention in which the coloring layer 51 is separately provided on the upper side of the polarizing layer 53, a clearer field of view can be secured.

  The degree of polarization of the polarizing layer 53 is not particularly limited, but is preferably 50% or more and 100% or less, and more preferably 80% or more and 100% or less. Thereby, unnecessary irregular reflection light can be cut more reliably. Further, the visible light transmittance of the polarizing layer 53 is not particularly limited, but is preferably 7% or more and 60% or less, and more preferably 8% or more and 50% or less. Thereby, a sufficiently bright field of view can be ensured.

  The constituent material of the polarizing layer 53 is not particularly limited as long as it has the above function. For example, a polymer obtained by adsorbing and dyeing a dichroic substance such as iodine or a dichroic dye and uniaxially stretching the polymer is used. Examples thereof include films and polyene oriented films. Examples of the constituent material of the polymer film include polyvinyl alcohol (PVA), partially formalized polyvinyl alcohol, polyethylene vinyl alcohol, polyvinyl butyral, polycarbonate, ethylene-vinyl acetate copolymer partially saponified product, and the like. Examples of the constituent material of the polyene-based oriented film include a dehydrated polyvinyl alcohol product and a dehydrochlorinated polyvinyl chloride product.

  Among these, the polarizing layer 53 is preferably a polymer film containing, as a main component, polyvinyl alcohol (PVA) uniaxially stretched by adsorbing or dyeing iodine or a dichroic dye. Polyvinyl alcohol (PVA) is a material having excellent transparency, heat resistance, affinity with iodine or dichroic dye as a dyeing agent, and orientation during stretching. Therefore, the polarizing layer 53 containing PVA as a main component has excellent heat resistance and high polarization ability.

  Examples of the dichroic dye include chloratin fast red, congo red, brilliant blue 6B, benzoperpurine, chlorazole black BH, direct blue 2B, diamine green, chrysophenone, sirius yellow, direct first red, and acid. Black etc. are mentioned.

The thickness T ₅₃ of the polarizing layer 53 is not particularly limited, and is preferably 5 μm or more and 60 μm or less, for example, and more preferably 10 μm or more and 40 μm or less. If the polarizing layer 53 is too thick, depending on the constituent material, the optical film 5 as a whole may be thick. On the other hand, if the polarizing layer 53 is too thin, the polarizing ability may be insufficient.

  The bonding layer 54 a has a function of sticking (bonding) the optical film 5 to the spectacle lens 4. Further, the bonding layer 54 b has a function of bonding the color forming layer 51 and the polarizing layer 53. Since the bonding layer 54a and the bonding layer 54b have the same configuration, the bonding layer 54a will be representatively described below.

  The bonding layer 54a is made of a light-transmitting adhesive or pressure-sensitive adhesive. The adhesive or pressure-sensitive adhesive is not particularly limited, and for example, any of urethane-based adhesives, epoxy-based adhesives, acrylic-based pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, and the like may be contained as a main component. Of these, it is particularly preferable to contain a urethane-based adhesive and an acrylic pressure-sensitive adhesive as main components. Furthermore, an adhesive or a pressure-sensitive adhesive that can exhibit higher adhesive force or pressure-sensitive adhesive force to the adherend material is preferable.

  The acrylic pressure-sensitive adhesive mainly comprises a low-Tg main monomer component that provides tackiness, a high-Tg comonomer component that provides adhesion and cohesion, and a functional group-containing monomer component for crosslinking and adhesion improvement. A polymer or copolymer obtained by polymerization.

  Examples of the main monomer component include ethyl acrylate, butyl acrylate, amyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, cyclohexyl acrylate, benzyl acrylate, alkyl acrylates, butyl methacrylate, methacryl Examples include methacrylic acid alkyl esters such as 2-ethylhexyl acid, cyclohexyl methacrylate, and benzyl methacrylate.

  Examples of the comonomer component include methyl acrylate, methyl methacrylate, ethyl methacrylate, vinyl acetate, styrene, acrylonitrile, and the like.

  Examples of the functional group-containing monomer component include carboxyl group-containing monomers such as acrylic acid, methacrylic acid, maleic acid, and itaconic acid, 2-hydroxyethyl (meth) acrylate, and 2-hydroxypropyl (meth) acrylate. And hydroxyl group-containing monomers such as N-methylolacrylamide, acrylamide, methacrylamide, glycidyl methacrylate and the like.

  The reason why an acrylic pressure-sensitive adhesive obtained by polymerizing such components is preferable is that it has excellent adhesion and cohesion, and has no unsaturated bond in the polymer, so it has high stability to light and oxygen. This is because arbitrary quality and characteristics according to the application can be obtained by selecting the molecular weight.

  Examples of the silicone pressure-sensitive adhesive include a dimethylsiloxane pressure-sensitive adhesive and a diphenylsiloxane pressure-sensitive adhesive.

The thickness T ₅₄ of the bonding layer 54a is not particularly limited, and is preferably 2 μm or more and 50 μm or less, and more preferably 5 μm or more and 35 μm or less.

  The optical film 5 can be disposed (attached) to the spectacle lens 4 by such a bonding layer 54a.

  Here, FIG. 4 is a diagram in which printing (marking) is performed by irradiating the optical film 5 with a laser (energy beam) L. FIG. In the optical film 5, the portion of the color forming layer 51 irradiated with the laser L changes color. This discoloration occurs because the color forming material in the color forming layer 51 causes a chemical reaction (for example, carbonization, discoloration, foaming, dispersion, etc.) by the energy of the irradiated laser L. This is caused by the fact that the color looks different in the part. Therefore, a print (marking) having a desired pattern can be formed on the colored layer 51 by irradiating a desired portion of the colored layer 51 with the laser L.

  In the present specification, “printing” means forming a pattern on the coloring layer 51. This pattern includes letters, numbers, figures (patterns), etc. indicating a company name and a designer.

  In particular, as shown in FIG. 4, in the optical film 5, the laser L is irradiated to the coloring layer 51 through the protective layer 52, and the portion of the coloring layer 51 irradiated (condensed) is changed in color. Thus, printing is performed on the coloring layer 51. For this reason, in the optical film 5, the printed portion of the coloring layer 51 (hereinafter simply referred to as “printing (marking) 513”) is necessarily covered with the protective layer 52. That is, it is possible to reliably avoid the state where the print 513 is exposed to the outside (outside air). Therefore, it is possible to reliably prevent part or all of the print 513 from disappearing due to wear as in the conventional case. As a result, since the sunglasses 1 can maintain the print 513 clearly even after repeated use, the design can be kept good.

  In the conventional spectacle film, in order to protect the print 513, it is necessary to attach a protective film to the light emitting layer 51 after printing. On the other hand, in the optical film 5, a laminated body of the coloring layer 51, the protective layer 52, the polarizing layer 53, and the bonding layers 54 a and 54 b is manufactured, and the laser L is applied to the coloring layer 51 of the laminated body. If the print 513 is formed by irradiation, the print 513 can be protected by the protective layer 52 disposed on the upper side of the coloring layer 51.

  Therefore, in the optical film 5, the trouble of sticking the protective film to the color forming layer 51 after printing or the trouble of providing the protective layer can be omitted. Further, even after the optical film 5 is attached to the spectacle lens 4 and further cut (processed) into a shape matching the frame 2, the protective layer is applied to a desired position of the coloring layer 51 by the laser L. A print 513 protected by 52 can be formed.

  The color of the print 513 can be adjusted by appropriately selecting the type of the coloring material 512. The color of the print 513 is preferably different from the color of the resin material 511, the color of the polarizing layer 53, and the color of the spectacle lens 4. Thereby, the clearness of the print 513 when the sunglasses 1 are viewed from the front side (outside) can be further enhanced.

  The visible light transmittance in the polarizing layer 53 is preferably set lower than the visible light transmittance in the coloring layer 51 (resin material 511). Thereby, when the optical film 5 is viewed from the front side (outside), the periphery of the print 513 looks relatively dark. Therefore, the print 513 can be made to stand out and the design of the optical film 5 can be improved. Furthermore, since the user (wearer) side sees the print 513 through the polarizing layer 53 and the bonding layer 54b, the print 513 can be made difficult for the user to see.

The laser L is, for example, a YAG (yttrium (Y) / aluminum (A) / garnet (G)) laser beam (wavelength = 1.064 μm) or a YVO ₄ (yttrium vanadate) laser beam (wavelength = 1). 0.064 μm) is preferably used. These laser beams have a property of transmitting through a transparent body, and can suppress the generation of smoke or the like from the protective layer 52 when printing on the coloring layer 51. Furthermore, the color density of the print 513 can be easily adjusted, and adverse effects (degeneration, deterioration, etc.) on the optical film 5 can be minimized. As a result, a clear print 513 can be formed on the coloring layer 51.

When using a YVO ₄ laser machine (manufactured by Keyence Corporation, “MD-V9600”), the pulse condition of the laser L is, for example, an average output of 0.8 to 5.0 W, more preferably 1.5 to 3. 0 W, the Q switch frequency is set to 10 to 30 KHz, and the scan speed is set to 300 to 4000 mm / s, more preferably 1500 to 3000 mm / s.

  Further, before the optical film 5 is attached to the spectacle lens 4 (when the optical film 5 is stored), the bonding layer 54a may be covered with a release sheet. When the optical film 5 is attached to the spectacle lens 4, the release sheet is peeled off from the bonding layer 54 a, so that dust adheres to the bonding layer 54 a during storage of the optical film 5, or the adhesive strength is reduced. Can be prevented.

  The release sheet is not particularly limited. For example, films made of various resin materials such as polyethylene terephthalate, polybutylene terephthalate, polyethylene, polypropylene, polyarylate, polyethylene laminated paper, clay coated paper, glassine paper, recycled paper The base material which consists of various paper materials, such as these, and the base material by which the mold release process was given to the joining surface with the joining layer 54a can be used. In this case, a typical example of the release treatment includes formation of a release agent layer made of a release agent such as a silicone resin, a long-chain alkyl resin, or a fluorine resin on the bonding surface.

Next, a method for manufacturing the sunglasses 1 including a printing method (marking method) on the coloring layer 51 will be briefly described.
First, as shown in FIG. 3, an optical film 5 is obtained. As this method, since a known lamination method can be used, the description thereof is omitted.

  Next, as shown in FIG. 3, the laser L is irradiated (condensed) toward the coloring layer 51 through the protective layer 52. As a result, as shown in FIG. 4, the portion of the color forming layer 51 irradiated with the laser L is discolored, and a print 513 is formed. That is, the coloring layer 51 is marked.

  At this time, since the laser L does not reach the polarizing layer 53, the polarizing layer 53 can be prevented from being altered or deteriorated. For this reason, the polarizing layer 53 can exhibit its function (polarizing ability) effectively. This is one of the advantages of providing the coloring layer 51 and the polarizing layer 53 separately, and further irradiating the coloring layer 51 with the laser L through the protective layer 52 (from the side opposite to the polarizing layer 53). One.

  Then, as shown in FIGS. 5 and 6, the optical film 5 is adhered to the front surface 41 of the spectacle lens 4. The surface 41 on the front side of the spectacle lens 4 constitutes a curved surface curved toward the upper side (outside). The optical film 5 has flexibility as a whole. For this reason, since the optical film 5 is deformed following the curved shape of the front surface 41 (curved surface), the optical film 5 can be neatly adhered to the front surface 41 without generating bubbles or the like.

  Thus, according to this method, the sunglasses 1 can be obtained by a simple method of irradiating the laser L toward the optical film 5 and sticking the optical film 5 to the spectacle lens 4.

  Note that the present invention is not limited to the above method, and for example, printing may be performed on the coloring layer 51 by irradiating the laser L with the optical film 5 attached to the spectacle lens 4 in advance.

Second Embodiment
FIG. 7: is sectional drawing which shows the spectacle lens with a laminated body which concerns on this invention of 2nd Embodiment.

  Hereinafter, a second embodiment of the eyeglass lens with a laminated body (a laminated body for eyeglass lenses) according to the present invention will be described with reference to this drawing. The explanation of matters is omitted.

  As shown in FIG. 7, the optical film 5A includes a coloring layer (first coloring layer) 51a, a coloring layer (second coloring layer) 51b, a protective layer 52, a polarizing layer 53, a bonding layer 54a, 54b. In the optical film 5A, the bonding layer 54a, the polarizing layer 53, the bonding layer 54b, the coloring layer 51a, the coloring layer 51b, and the protective layer 52 are laminated in this order from the lower side (back side).

  In the optical film 5A of the present embodiment, the color of the color developing layer 51a is set to be darker than the color of the color developing layer 51b. That is, the visible light transmittance in the color forming layer 51a is lower than the visible light transmittance in the color forming layer 51b. For this reason, when the optical film 5A is viewed from the upper side (front side), the print 513b of the coloring layer 51b appears to protrude.

  Moreover, it is preferable that the coloring layers 51a and 51b have different colors (hue) after coloring. Specifically, it is preferable to select the coloring material so that the color of the print 513a of the coloring layer 51a is darker than the color of the printing 513b of the coloring layer 51b. According to such an optical film 5A, when the print 513b is viewed from the upper side (front side), since the dark color print 513a is located on the lower side (back side), the print 513b can be seen clearly. . From such a thing, it can be set as the optical film 5A excellent in design property.

  As mentioned above, although the laminated body for spectacle lenses, the spectacle lens with a laminated body, and the marking method of this invention were described about embodiment of illustration, this invention is not limited to this, The laminated body for eyeglass lenses, and a laminated body Each part constituting the eyeglass lens can be replaced with any part that can exhibit the same function. Moreover, arbitrary structures, such as a surface coat, may be added to the laminated body for spectacle lenses. Furthermore, the marking method of the present invention may include any additional steps.

  In addition, the laminated body for spectacle lenses and the spectacle lens with laminated body of the present invention may be combined with any two or more configurations (features) of the respective embodiments.

  In each of the embodiments described above, the spectacle lens laminate is attached to the entire front surface of the spectacle lens. However, in the present invention, the present invention is not limited to this, and the spectacle lens laminate is applied to a part of the front surface of the spectacle lens. You may wear it.

  The present invention is a spectacle lens laminate used by being disposed on the front surface of a spectacle lens, provided with a light transmissive layer having light transmissivity, a back side of the light transmissive layer, A coloring layer containing a coloring material that develops color upon irradiation, and a polarizing layer provided on the back side of the coloring layer and polarizing incident light incident through the light-transmitting layer and the coloring layer. To do. Thereby, the laminated body for spectacle lenses and the spectacle lens with a laminated body which can prevent the printed part of the coloring layer from disappearing can be provided. It is also possible to provide a marking method for efficiently marking the eyeglass lens laminate and the eyeglass lens with the laminate. Therefore, the present invention has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Sunglasses 2 Frame 21 Rim part 22 Bridge part 23 Temple part 24 Nose pad part 3 Laminated spectacle lens 4 Eyeglass lens 41 Front side surface 5 Optical film 5A Optical film 51 Color development layer 51a Color development layer 51b Color development layer 511 Resin material 512 Color development Material 513 Printing 513a Printing 513b Printing 52 Protective layer 53 Polarizing layer 54a Bonding layer 54b Bonding layer L Laser

Claims (6)

A laminated body for spectacle lenses that has flexibility and is arranged and used on the curved surface on the front side of the spectacle lens in a deformed state following the curved shape ,
A light transmissive layer having light transparency;
A color-forming layer provided on the back side of the light-transmitting layer and containing a color-forming material that develops color upon irradiation with energy rays;
A polarizing layer provided on the back side of the coloring layer, and polarizing incident light incident through the light-transmitting layer and the coloring layer;
The visible light transmittance in the polarizing layer is lower than the visible light transmittance in the coloring layer,
The colored material that has developed color is different from the hue of the polarizing layer ,
The color developing layer includes a first color developing layer and a second color developing layer provided on the back side of the first color developing layer, the second color developing layer having a hue different from that of the first color developing layer,
The visible light transmittance in the second coloring layer is lower than the visible light transmittance in the first coloring layer .   2. The eyeglass lens laminate according to claim 1, wherein the coloring material includes at least one of a bismuth compound, a phthalocyanine compound, a naphthalocyanine compound, and an anthraquinone compound. 3. The eyeglass lens according to claim 1 , further comprising a bonding layer that is light transmissive and provided on a back side of the color developing layer and that bonds the eyeglass lens laminate to the eyeglass lens. Laminated body. A spectacle lens with a laminate comprising a spectacle lens having a curved surface on the front side and a laminate for spectacle lenses arranged on the curved surface ,
The laminated body for spectacle lenses includes a light-transmitting layer having a light-transmitting property, a color-forming layer provided on the back side of the light-transmitting layer and colored by irradiation with energy rays, and the back side of the color-forming layer A polarizing layer that polarizes incident light incident through the light-transmitting layer and the color-forming layer, and
The visible light transmittance in the polarizing layer is lower than the visible light transmittance in the coloring layer,
The colored material that has developed color is different from the hue of the polarizing layer ,
The color developing layer includes a first color developing layer and a second color developing layer provided on the back side of the first color developing layer, the second color developing layer having a hue different from that of the first color developing layer,
The eyeglass lens with a laminate , wherein a visible light transmittance in the second coloring layer is lower than a visible light transmittance in the first coloring layer . Preparing the laminate for spectacle lens according to any one of claims 1 to 4 ,
The first coloring layer and the second coloring layer of the eyeglass lens laminate are irradiated with the energy rays through the light-transmitting layer to cause the coloring material to develop a color . And a step of marking the second coloring layer and the second coloring layer . Preparing the laminated spectacle lens according to claim 4 ;
The first coloring layer and the second coloring layer of the laminated spectacle lens are irradiated with the energy rays through the light-transmitting layer to cause the coloring material to develop a color . And a step of marking the second coloring layer and the second coloring layer .

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