TWI385411B - Polarized resin lens manufacturing method - Google Patents

Description

Polarized resin lens manufacturing method Technical field

The present invention relates to a polarizing resin lens having a polarizing film which is excellent in bondability and anti-glare property and excellent in productivity, and a method for producing the same.

Background technique

A polarizing resin lens in which a polarizing film is adhered to a surface of a lens formed of a thermoplastic resin or a thermosetting resin and a method for producing the same are known (Patent Document 1). That is, a conventional method for producing a polarizing resin lens includes a method of holding a polarizing film by two lenses and adhering by an adhesive, and loading the polarizing film into a mold that can be injection molded without using an adhesive. A method of injection molding of a thermoplastic resin.

[Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 10-133016 (paragraph 0029, Fig. 2)

In the above method using an adhesive, there is a problem that the polarizing mode is released from a predetermined position when the adhesive is applied, wrinkles occur, or skew occurs due to pressurization when the polarizing film is held by the two lenses. Further, in the method of injection molding, there is a problem that the polarizing film is deformed or skewed at the time of resin injection. Regardless of the above methods, there are problems in that the yield is poor, the production efficiency is low, and the cost becomes high.

The present invention has been made in view of the above disadvantages, and is intended to provide a A polarizing resin lens having a strong polarizing property and a long-lasting anti-glare property, and a lens made of a polarizing resin excellent in productivity and a method for producing the same.

Therefore, in order to solve the above problem, the polarizing resin lens of the present invention includes: a polarizing film molded body; a UV-based adhesive layer applied to the surface of the polarizing film molded body; and superposed on the UV-based adhesive layer by UV The lens substrate to be bonded thereto is irradiated; and a curable resin monomer layer formed on the surface of the polarizing film formed body.

The curable resin monomer layer includes a thermosetting resin monomer, a photocurable resin monomer layer produced by UV (ultraviolet light), and an EB curable resin monomer layer produced by EB (electron beam). . Further, it is preferred that the surface of the polarizing film formed body and the surface of the polarizing film are coated with a dried primer.

Moreover, the method for producing a polarizing resin lens according to the present invention includes the steps of: preparing a lens substrate and a polarizing film molded body; and applying a UV-based adhesive to the surface of the polarizing film forming body to form a UV-based adhesive layer; And superimposing the surface of the lens substrate on the UV-based adhesive layer and bonding it by UV irradiation to form a lens laminate substrate; forming a curable resin monomer layer on the polarizing film formed body of the lens laminate substrate; The resin monomer layer is cured, and the curable resin monomer layer is integrally bonded to the lens laminate substrate.

Before the step of forming the UV-based pressure-sensitive adhesive layer, it is preferable to further include a molding step of conforming the surface shape of the polarizing film molded body to the lens substrate.

Before the step of forming the UV-based pressure-sensitive adhesive layer, it is preferred to further include a step of applying a primer to the surface of the polarizing film formed body and drying the surface.

The step of forming the UV-based pressure-sensitive adhesive layer is preferably carried out by placing the surface of the polarizing film molded body on a molding die.

The step of forming the curable resin monomer layer preferably includes the steps of: filling a curable resin monomer on a molding die, and placing the lens laminate substrate on the curable resin monomer, and laminating the lens. The polarizing film molded body of the substrate is superposed on the curable resin monomer.

Further, the method for producing a polarizing resin lens of the present invention preferably further comprises the step of: dicing the outer periphery of the polarizing film formed body of the lens laminated substrate to the UV-based adhesive layer protruding from the lens substrate And retaining the protruding portion; and when the lens laminated substrate is placed on the forming die, the protruding portion of the lens laminated substrate is abutted on the segment portion which has been formed on the inner peripheral surface of the forming die to maintain the polarizing of the forming die and the lens laminated substrate The distance between the film formed bodies.

According to the invention, a UV-based adhesive is applied to the surface of the polarizing film forming body to form a UV-based adhesive layer, and the surface of the lens substrate is superposed on the UV-based adhesive layer and bonded by UV irradiation to form a lens laminated substrate. A curable resin monomer layer is formed on the polarizing film molded body of the lens laminate substrate, and the curable resin monomer layer is cured, and the curable resin monomer layer and the lens laminated substrate are integrally joined to each other. The polarizing film formed body is detached from a predetermined position, or wrinkles or the like occurs, and the lens base and the polarizing film are formed. The shape system is fully joined. Moreover, the stable state in which the skew does not occur can be continued for a long period of time without deteriorating the anti-glare performance.

Further, the outer periphery of the polarizing film formed body of the lens laminated substrate is cut to the aforementioned UV-based adhesive layer protruding from the lens substrate, and the protruding portion is retained, and when the lens laminated substrate is placed on the molding die, the protruding portion of the lens laminated substrate is made The contact portion is formed on the inner peripheral surface of the forming mold body to maintain the distance between the forming mold and the polarizing film formed body of the lens laminated base. Therefore, it is not necessary to increase the outer diameter of the lens substrate in advance, and the finished product can be used, the yield is remarkably improved, the production efficiency is improved, and the manufacturing cost can be lowered.

Further, the curable resin monomer layer can have the effect of covering the thin lens of the surface portion of the lens laminate substrate, and can be completely adhered, is not easily damaged, and can be used for a long period of time, and can maintain anti-glare property.

Simple description of the schema

Fig. 1(a) is a front view of a lens made of a polarizing resin, and Fig. 1(b) is a longitudinal sectional view of a central portion of a lens made of a polarizing resin.

Fig. 2 is an explanatory view showing an exploded state of a lens made of a polarizing resin.

3(a) to 3(e) are longitudinal cross-sectional views showing the central portion of the method for producing a polarizing resin lens.

4(a) to 4(c) are longitudinal cross-sectional views of the central portion of the manufacturing method following the third drawing.

Best practice mode for implementing the invention

Hereinafter, an embodiment of the polarizing resin lens of the present invention and a method of manufacturing the same will be described in detail based on a model diagram.

The polarizing resin lens 1 is mainly composed of a lens base 2, a polarizing film molded body 4, and a thermosetting resin monomer layer 6.

The lens base 2 is a transparent or translucent body formed by a die casting method or an injection molding method using a resin such as a thermosetting resin or a thermoplastic resin which is currently used, and has a thickness of about 1.5 mm to 20 mm and a diameter of about 50 mm to 100 mm. And the surface thereof is formed into a convex shape, and the kneading surface is formed into a concave shape. The lens substrate 2 may have a standard refractive index of 1.50, a refractive index of 1.53 to 1.58, or a high refractive index of 1.59 to 1.80.

The polarizing film formed body 4 is formed by sandwiching a thin lens made of polyvinyl alcohol (PVA), polycarbonate (PC), or polyacrylic acid (PA) to a thickness of 30/100 to 35/100 mm in two molding dies. After heating and pressurizing, it is formed into a curved surface that fits the surface of the lens substrate 2, and is demolded after cooling. After preparing an appropriate amount of the polarizing film formed body 4, the primer is applied to the surface of the surface of the film, and then dried. Further, the forming mold of the polarizing film is preferably made of glass or metal.

The UV-based pressure-sensitive adhesive layer 3 is formed on the surface of the polarizing film formed body 4, and the surface of the lens base 2 can be superposed and bonded to the UV-based pressure-sensitive adhesive layer 3.

The thermosetting resin monomer layer 6 is formed on the surface of the polarizing film formed body 4. The thermosetting resin monomer is preferably CR-39 (propylene diglycol carbonate) or TS-16 (diethylene ethyl allylate carbonate), but is not limited to these monomers. The thermosetting resin monomer layer 6 can have the effect of covering a thin lens of the surface portion of the lens laminate substrate 5. The thermosetting resin monomer layer 6 may have a standard refractive index of 1.50, may have a refractive index of 1.53 to 1.58, or a high refractive index of 1.59 to 1.80. Further, a photocurable resin monomer layer produced by UV (ultraviolet rays) or an EB curable resin monomer produced by EB (electron beam) may be used. A layer is substituted for the thermosetting resin monomer layer 6. The surface of the thermosetting resin monomer layer 6 may be any shape such as a spherical surface, an aspheric surface, a progressive multifocal point, a bifocal point, a special multifocal point, a triple focus, or the like.

Next, a method of manufacturing the polarizing resin lens 1 will be described.

First, the lens substrate 2 and the polarizing film formed body 4 are prepared. The surface of the lens base 2 and the surface of the lens are each formed into a convex shape and a concave shape, and each forms a predetermined spherical surface of curvature. The lens base 2 can be used as an unmilled standard size finished product having a diameter of 50 mm to 100 mm, or a ground lens itself. The polarizing film formed body 4 is a circular body larger than the lens base 2, and is formed in advance along the surface of the lens base 2. The primer is applied to the surface and the surface of the polarizing film formed body 4 and dried.

Next, as shown in Fig. 3(a), the surface of the polarizing film formed body 4 is placed on the concave molding die 7a corresponding to the surface side of the lens substrate 2. Then, as shown in Fig. 3(b), a UV-based adhesive is applied to the surface of the polarizing film formed body 4 (upper side in the drawing) in an appropriate amount to form a uniform UV-based adhesive layer 3. As shown in Fig. 3(c), the surface of the lens substrate 2 is superposed on the UV-based adhesive layer 3, and both the molding die 7a and the lens substrate 2 are pressed for a short time, and the polarizing film molded body 4 is temporarily adhered to the lens. The surface of the substrate 2. Here, as shown in Fig. 3(c), the outer periphery of the UV-based adhesive layer 3 is protruded from the outer periphery of the lens substrate 2, and the adhesive state of the lens substrate 2 and the polarizing film formed body 4 is maintained and the shape is not formed. The mold 7a is taken out and guided to a UV irradiation device (not shown) and irradiated with UV from above the molding die 7a for 10 to 120 seconds. Thereby, the lens laminated substrate 5 of the semi-finished product which has been bonded once can be obtained. Next, as shown in Fig. 3(d), the lens laminate substrate 5 is temporarily taken out from the molding die 7a.

As shown in Fig. 3(e), the outer periphery of the polarizing film formed body 4 of the lens laminated base 5 is cut to the UV-based adhesive layer 3, and the protruding portion 5a is left. When the outer diameter of the lens base 2 is 75 mm, the outer diameter of the protruding portion 5a is about 78 mm.

Next, as shown in Fig. 4(a), an appropriate amount of the thermosetting resin monomer 6' is uniformly filled in the concave surface of the molding die 7b, and the lens laminated substrate 5 is placed on the thermosetting resin monomer 6 'on. Here, the protruding portion 5a of the lens laminated base 5 is brought into contact with the segment portion 8a which has been formed on the inner circumferential surface of the frame 8 of the molding die 7b to hold the concave surface of the molding die 7b and the polarizing film molded body of the lens laminated substrate 5. The distance between 4. The concave surface of the forming die 7b may be any of a spherical surface, an aspherical surface, a progressive multifocal point, a bifocal point, a special multifocal point, and a triple focus. Next, the lens laminate substrate 5 is placed on the thermosetting resin monomer and is not taken out from the molding die 7b, and then placed in a thermostatic oven (not shown) having no oxidizing atmosphere gas, and is 5 The thermosetting resin monomer is polymerized and hardened at ~135 ° C, generally at a temperature of 35 to 90 ° C for 8 to 20 hours to form a thermosetting resin monomer layer 6 . Then, as shown in Fig. 4(b), the lens laminated base 5 on which the thermosetting resin monomer layer 6 has been formed is taken out from the molding die 7b, and the remaining portion 6a of the thermosetting resin monomer layer 6 is cut off and protruded. In the portion 5a, the polarizing resin lens 1 as shown in Fig. 4(c) is obtained. When a photocurable resin monomer layer or an EB curable resin monomer layer is used, it is only necessary to irradiate UV (ultraviolet) or EB (electron beam) from above the lens laminate substrate 5.

In the lens laminated base 5, the protruding portion 5a provided on the outer periphery thereof abuts against the segment portion 8a of the frame 8 of the molding die 7b. Therefore, it is not necessary to increase the outer diameter of the lens base 2 in advance, and it is possible to use the finished product.

Keep the constant temperature oven without oxidizing ambient gas filled with nitrogen The gas is thermally polymerized in an oxidizing-free atmosphere to further promote polymerization and hardening.

The obtained polarizing resin lens 1 has a degree of polarization of 90% or more which is substantially the same as that of a conventionally known polarizing lens, and of course, it is possible to completely prevent the glare reflected light.

Industrial utilization of invention

The polarizing resin lens 1 of the present invention is mainly used for sunglasses, but it is of course possible to add or not add degrees.

1‧‧‧Polarized resin lens

2‧‧‧Lens base

3‧‧‧UV adhesive layer

4‧‧‧Polarized film forming body

5‧‧‧Lens laminated substrate

6‧‧‧ thermosetting resin monomer layer

6'‧‧‧ thermosetting resin monomer

8‧‧‧Frame of forming mould

5a‧‧‧Protruding part of lens laminated substrate

6a‧‧‧The remaining part of the thermosetting resin monomer layer

7a, 7b‧‧‧forming mould

8a‧‧‧section of the formwork frame

Fig. 1(a) is a front view of a lens made of a polarizing resin, and Fig. 1(b) is a longitudinal sectional view of a central portion of a lens made of a polarizing resin.

Fig. 2 is an explanatory view showing an exploded state of a lens made of a polarizing resin.

3(a) to 3(e) are longitudinal cross-sectional views showing the central portion of the method for producing a polarizing resin lens.

4(a) to 4(c) are longitudinal cross-sectional views of the central portion of the manufacturing method following the third drawing.

1‧‧‧Polarized resin lens

2‧‧‧Lens base

3‧‧‧UV adhesive layer

4‧‧‧Polarized film forming body

5‧‧‧Lens laminated substrate

6‧‧‧ thermosetting resin monomer layer

Claims (5)

A method for producing a lens made of a polarizing resin, comprising: preparing a lens substrate and a polarizing film molded body; applying an ultraviolet-based adhesive to the polarizing film formed body to form an ultraviolet-based adhesive layer; and forming a surface of the lens substrate And superimposed on the ultraviolet-based adhesive layer and bonded by ultraviolet irradiation to form a lens laminate substrate; the curable resin monomer layer is formed on the polarizing film formed body of the lens laminate substrate; and the curable resin monomer is filled in the molding die Further, the lens laminated substrate is placed on the curable resin monomer, and the polarizing film molded body of the lens laminated substrate is superposed on the curable resin monomer; and the curable resin monomer layer is cured. Further, the curable resin monomer layer and the lens laminate substrate are joined together. The method for producing a polarizing resin lens according to the first aspect of the invention, further comprising the step of forming a surface shape of the polarizing film molded body and the lens substrate before the step of forming the ultraviolet-based adhesive layer. The method for producing a polarizing resin lens according to the first aspect of the invention, further comprising applying the primer to the surface and the inside of the polarizing film formed body and drying the film before the step of forming the ultraviolet-based adhesive layer The steps. The method for producing a polarizing resin lens according to the first aspect of the invention, wherein the step of forming the ultraviolet-based adhesive layer is as described above The surface of the polarizing film formed body is placed on a forming mold. The method for producing a polarizing resin lens according to the first aspect of the invention, further comprising the step of: arranging the outer periphery of the polarizing film formed body of the lens laminated substrate to the ultraviolet-based adhesive protruding from the lens substrate a layer, and retaining the protruding portion; and when the lens laminated substrate is placed on the molding die, the protruding portion of the lens laminated substrate is brought into contact with a segment which has been formed on the inner circumferential surface of the molding die body to maintain The distance between the above-mentioned forming mold and the polarizing film formed body of the above-mentioned lens laminated base.