JP2009139964A - Polarizing compound sheet and its application method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the manufacturing method of a polarizing compound sheet by which a polarizing laminate sheet produces no curvature even when annealing treatment is performed at temperature and for a time sufficient to remove residual strain. <P>SOLUTION: Polycarbonate resin films are adhered across an adhesion base layer on both surfaces of a widely used polarizing sheet which is held between cellulose triacetate film layers in order to protect both surfaces of a polarization element. Thus a means for carrying out compound formation of the cellulose triacetate film layer on the inner surface and a polycarbonate resin film layer on the outer surface to obtain the polarizing compound sheet is established. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

In the present invention, a polycarbonate resin film is formed on both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate films widely distributed in the market, and it is difficult to produce only with a polarizing sheet made of cellulose triacetate. The present invention relates to a polarizing composite sheet capable of economically obtaining an optical composite molded product used as a lens for correction glasses, sunglasses, goggles and the like, and an application method thereof.

In general, a polarizing film such as a polyvinyl alcohol (PVA) film is laminated with a cellulose triacetate film (TAC) and is called a polarizing sheet. This polarizing sheet is widely used for liquid crystal screens and portable screens. Since the polarizing sheet is readily available and inexpensive, it has recently been applied and used in the fields of sunglasses and front spectacles having a polarizing function.

As a manufacturing method of an injection molding method for obtaining such a polarization function,
A preformed polarized lens element is placed in a mold, molten plastic is filled into a cavity, and a plastic base layer is fused and integrated to manufacture a lens with high production efficiency.

A polarizing lens in which a plastic base layer is fused and integrated on one side of a polarizing sheet. The polarizing sheet is preliminarily formed into a spherical shape by laminating transparent coating layers on both sides of the polarizing element, and the polarizing sheet is set in a mold. Then, the molten plastic is poured into the cavity to mold the plastic base layer, and it is fused and integrated with the polarizing sheet, and the plastic base layer is polished into a lens with an appropriate degree by post-processing. Manufacturing method.

A polarizing sheet having a thickness of 0.2 mm or less, a total light transmittance of 40% or more, and a degree of polarization of 99.0% or more obtained by sticking a cellulose triacetate film on both sides of the polarizing film via an adhesive. A plastic film having a total light transmittance of 80% or more and a thickness of 0.1 to 0.3 mm is laminated on one cellulose triacetate film surface of this polarizing sheet using an adhesive, and this laminated sheet is molded. For molding a lens that is molded by hot pressing so that the cellulose triacetate film surface of the sheet is the outer surface, and is inserted into the inner surface of the mold, and then fused to the plastic film. Method for producing optical laminated molded product having polarization performance, characterized by injection molding of resin material

Color printing is performed on one of the cellulose triacetate film surfaces of the polarizing sheet obtained by sticking a cellulose triacetate film on both surfaces of the polarizing film with an adhesive, and a transparent ink made of a transparent colorant. A plastic film having a transmittance of 80% or more and a thickness of 0.1 to 0.3 mm is laminated using an adhesive to obtain a laminated sheet, and the laminated sheet is then shaped into a shape close to the outer form of the object to be molded. The cellulose triacetate film is molded by hot bending so that it becomes the outer surface, and this is inserted into a mold, and the resin material for lens molding that is fused with the film is injection molded on the inner plastic film side. An optical laminated molded article having polarizing performance, characterized by being obtained.
Made of cellulose triacetate, which is a laminated molded product that has a polarizing function on one surface of the convex surface, the eyepiece surface is concave, and the convex and concave surfaces obtained by the injection molding method, and the adhesive layer is coated on one side A new adhesive layer is applied to the non-adhesive layer of the polarizing sheet, and a thermoplastic resin film is pasted and laminated. The resulting laminated sheet is hot-pressed into a shape close to the outer shape of the target mold. Then, the adhesive layer of the processed sheet is exposed, and the thermoplastic resin film layer is attached to the cavity of the mold of the injection molding machine so as to be formed on one of the uneven surfaces. The technical means of the laminated molding obtained by injecting and molding the injection molding optical resin of the same material as the pasted thermoplastic resin film and thermocompression bonding the adhesive layer of the processed sheet and the injection molding optical resin. The inventor previously proposed.

A spirooxazine compound is added to the main raw material plastic, that is, cellulose acetate / propionate, and an appropriate amount of auxiliary materials such as a stabilizer, a filler, an antistatic agent and the like are added as necessary. A dimming plastic lens having a photochromism phenomenon in which the entire lens is thinly colored by means of injection molding or compression molding is manufactured using a material obtained by mixing and kneading these materials. Furthermore, the present inventor previously proposed means for forming an ultraviolet absorbing layer in the lower portion of the above-mentioned light control plastic lens.

  In a method for manufacturing a polarizing resin lens in which a polarizing film is bonded to the surface of a resin lens substrate, a step of forming a polarizing film molded body in accordance with the shape of the lens substrate and a primer are applied to both surfaces of the polarizing film molded body The polarizing film molded body coated with a primer is placed on the concave surface of the molding die, and a UV-based adhesive layer having a uniform thickness is formed on the entire upper surface of the polarizing film molded body. Stacking the lens base on the adhesive layer, pressurizing the polarizing film molded body and the lens base, solidifying the UV adhesive layer by UV irradiation to form a lens laminated base, and Forming the thermosetting resin monomer layer by releasing the lens-laminated substrate from the mold and then filling the concave surface of the mold with a uniform thickness of the thermosetting resin monomer; and the thermosetting Placing the lens laminated substrate on the fatty monomer layer and heating, polymerizing and curing the thermosetting resin monomer, and bonding the thermosetting resin monomer layer and the lens laminated substrate. The present inventor previously proposed a technical means for producing a polarizing resin lens characterized by the following.

In a method of manufacturing a laminated lens in which one or a plurality of functional lenses are formed on one surface of a lens base formed of resin or glass, a lower mold formed according to the shape of the functional lens to be molded, and the lower mold A seal member that seals the periphery of the lens base, the lens base is formed in advance, and a projecting portion that projects radially from the peripheral portion of the lens base is formed over the entire periphery of the peripheral portion, and the seal member The functional lens to be formed has a depth dimension of a cavity formed between the lens base and the lower mold when the lower mold is inserted into the lens base and the lens base is fitted into the seal member. Positioning the lower mold in the seal member so that the thickness of the lower mold is substantially the same, and forming the functional lens on the mold surface of the lower mold The lens material is supplied in a fluidized state, the lens base is fitted into the seal member in a state of facing the lower mold, and the lens material is spread while being pressed by the lens base, so that the cavity is the lens material. The inventor previously proposed a technical means for forming the functional lens on one surface of the lens base by curing the lens material.

Polarizing film molded body, UV adhesive layer applied to the back surface of the polarizing film molded body, a lens substrate superimposed on the UV adhesive layer and bonded by UV irradiation, and the polarizing film molded body The present inventor previously proposed a technical means for forming a polarizing resin lens comprising a curable resin monomer layer formed on the surface of the substrate.

Split molds in injection molds can be divided to create depth-adjustable steps, and the polarizing film can be positioned reliably, and the molten lens molding resin fills the runners connected to the mold. By injecting from the gate into the mold cavity, the deformation and displacement of the polarizing film due to heat and flow can be prevented and positioning can be performed reliably. In addition, the present inventor previously proposed a method for forming a lens mold with a uniform density and producing a highly accurate product with almost no distortion.

A film in which a vapor-deposited film layer is formed on one side of a thermoplastic resin film, an adhesive is applied to the vapor-deposited film layer, the film is preformed into a lens shape by hot pressing, and then the molded product is molded. The inventor previously proposed a technical means characterized by injection molding a resin material for lens molding that is inserted into the inner surface of a mold and fused with an adhesive layer of the film.

A polarizing lens manufacturing method that can dramatically reduce the distortion of a polarizing film caused by hot pressing, and can be reliably positioned in a molding die, and can ensure stable uniformity of a product lens. The inventor has previously proposed.

A polarizing lens manufacturing method that can be hot-pressed at low temperatures, has good processability, dramatically reduces the distortion of the polarizing film due to heat, and reduces the materials used to reduce manufacturing costs. And technical means for providing polarizing plates used therefor have been proposed previously.

An eyeglass lens having a convex objective surface and a concave eyepiece surface formed by injection molding of a melted transparent thermoplastic resin in a mold cavity, and having a high refractive index of 1.60 or more. A high-dispersion transparent thermoplastic resin having a medium refractive index or a low refractive index having a refractive index of 1.59 or less is used as a back resin for a primary molded article comprising a high-fluidity and low-dispersion transparent thermoplastic resin. It is a composite molded product that is secondary molded and melted and molded integrally, and is characterized in that a polarization function and a vision correction function in the vision correction region are added to either the primary molded product or the secondary molded product. The inventor previously proposed a technical means to do this.

JP-B 61-57167 Japanese Patent Application No.7-350450 Japanese Patent No. 3681325 JP 2008-276150 A Japanese Patent No. 4117657 JP 08-254603 A Japanese Patent No. 3823225 JP2007-164030 WO2006 / 035494 WO2004096529 Patent Publication 2006-168133 Patent Publication No. 2007-152704 Patent Publication No. 2007-293030 Japanese Patent No. 4179284

As a first problem, the manufacturing methods described in Patent Documents 1 to 3 are all close to the outer shape of the target lens mold by sticking a thermoplastic resin film to one of the general-purpose cellulose triacetate polarizing sheets. A hot press process is performed, and the processed sheet is placed in a mold cavity of an injection molding machine. By an injection molding method, a molded body having a polarization function that is fused and integrated with an optical material is obtained. This manufacturing method has a number of problems and it is difficult to supply a stable product. The polarizing lenses obtained from Patent Documents 1 to 3 are used for acrylic lenses or polycarbonate lenses in which the reinforcing liquid used in the reinforcing process after injection molding is generally manufactured because the material of the uneven surface is not the same. In order to avoid such problems, a primer coat layer that adheres to the uneven surface is provided in order to avoid such problems. Further, a top coat is further applied. However, this method frequently causes defects such as dust and dust when dipping twice, resulting in a great economic burden. Even if an optimal strengthening liquid that adheres to both the objective and eyepiece materials is discovered, an economic burden from 10 to 20 times the unit price of liquid used for acrylic lenses or polycarbonate lenses may occur. There is a problem that the pot life is much shorter than the conventional one, so that economic loss is forced.

As a second problem, the optical laminated molded product described in Patent Document 4 is manufactured by using a dye having a polarizing performance suitable for the target color tone, and manufacturing the polarizing sheet. However, in order to cope with various colors, a sheet with a large number of colors must be prepared, and the optical laminated molded product has a cellulose triacetate film attached to both sides of the polarizing film via an adhesive. Color printing is performed on one cellulose triacetate film surface of the polarizing sheet obtained by sticking with a transparent ink made of a transparent colorant, and the total light transmittance is 80% or more and the thickness is 0.1 to 0. A 3 mm plastic film is laminated using an adhesive to obtain a laminated sheet, and the laminated sheet is then shaped into a shape close to the outer form of the molding object. Molded by thermal bending so that the film is on the outer surface, inserted into a mold, and obtained by injection molding a lens molding resin material that is fused to the film on the inner plastic film side. Originally, transparent ink is color-printed on the cellulose triacetate film surface with a transparent colorant, and then a plastic film is laminated and placed so that the plastic film surface is exposed in the mold and fused with the plastic film. It is not possible to obtain a polarizing lens having various desired colors by injection molding the lens molding resin material. As a reason for not being obtained, it is necessary to select a dye-based polarizing film because it must have high durability to be used in the injection molding method. In most cases, a cellulose triacetate polarizing sheet is gray having a total light transmittance of 30% or more. The composition of the optical molded article described in Patent Document 4 is a cellulose triacetate film layer, a dye-based polarizing film having a total light transmittance of 30% or more, a cellulose triacetate film layer, a color ink printing layer, an adhesive layer, and a thermoplastic resin film. When the hue is visually confirmed from the object side, the color that can be confirmed is always gray with a total light transmittance of 30% or more under natural light. Eventually, polarizing films with a wide variety of colors must be obtained. When the objective surface of the spectacle lens is a convex surface or the eyepiece surface is a concave surface as in the manufacturing methods described in Patent Documents 1 to 3, the convex and concave surfaces of the spectacle lens are not the same material. On top of this, a top coat layer must be applied and processed to form a reinforcing film layer. The polarizing sheet used in any of the above production methods is characterized in that a thermoplastic resin film is attached to one of polarizing films sandwiched between cellulose triacetate films via an adhesive or a pressure-sensitive adhesive.

When a polycarbonate resin film is laminated on one of the general-purpose cellulose triacetate polarizing sheets, optical distortion is applied to the molded product after it is bent during the process of bending to the same spherical degree as that of the target mold. Remains, and the laminated surface cracks. In order to remove this residual strain, annealing is usually performed at 110 to 120 ° C for 30 to 90 minutes. However, if the polarizing composite sheet is given sufficient temperature and time for the annealing, it curls as a large amount of warp due to shrinkage heat. Resulting in. If the die cutting process is performed so that the polarized composite sheet that has been curled matches the bending process, there is a problem that workability is poor and economic loss is imposed on the operator.

The present invention has been made in view of the above problems. First, even a polarizing laminated sheet in which a polycarbonate resin film is bonded to a cellulose triacetate film is not warped, and has excellent workability and residual strain. Is to establish a polarizing composite sheet and its application method.

In order to achieve the first object of the present invention, a polycarbonate resin film is bonded to both sides of the polarizing element via an adhesive base layer instead of one of the general-purpose polarizing sheets sandwiched between the cellulose triacetate films. The cellulose acetate film was combined as a protective layer for the polarizing element, and a polycarbonate resin film layer was formed on the outer surface to obtain a polarizing composite sheet.

  In order to achieve the second object of the present invention, a polycarbonate resin film is attached to both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate films with a polarizing element between the cellulose triacetate films, and a general-purpose cellulose on the inner surface. Polycarbonate that can be fused and fused integrally to one side of a polarizing laminate sheet that is laminated with an acetate film as a protective layer for a polarizing element and a polycarbonate resin film layer is formed on the outer surface by injection molding. A means for forming a resin layer was adopted.

  In order to achieve the third object of the present invention, an ultraviolet curable adhesive comprising a main component of a polyisocyanate compound and a curing agent of a polyol compound as an adhesive base layer to be bonded to a cellulose triacetate film layer and a polycarbonate resin film layer. A means of adhering with an agent was adopted.

In the present invention, the polarizing element preferably has a thickness of about 0.03 to 0.05 mm and has a uniform thickness. The base film is a polyvinyl alcohol film, a polyvinyl acetal film, or a polyvinyl butyral film. There is no particular limitation as long as it is a product obtained by dyeing and uniaxially stretching using a chromatic dye.

In the present invention, the polarizing sheet has a cellulose triacetate film having optically excellent transparency on both surfaces of the polarizing element described above, a gravure coating method,
From an average molecular weight of 10,000 or more by the offset coating method,
Bonding using a two-component curable adhesive that blends a polyisocyanate as a cross-linking curing agent to a polyol mainly composed of polyester urethane resin of 200,000 or less, polyether urethane resin, or polyester polyether urethane resin. The most preferable polarizing sheet has a total thickness of 0.2 mm or less, a total light transmittance of 40% or less, and a degree of polarization of 90.0% or more. Is. The total thickness of the polarizing sheet is 0.
2 mm or less is intended to achieve a total light transmittance of 40% if it is 0.2 mm or less.
This is because the material cost is the best and the economy is good.

  Polycarbonate resin film that can be suitably used in the present invention includes polybisphenol A carbonate. In addition, 1,1'-dihydroxydiphenyl-phenylmethylmethane, 1,1'-dihydroxydiphenyl-diphenylmethane, 1,1'-dihydroxy-3,3'-dimethyldiphenyl-2,2-propane single polycarbonate, mutual And polycarbonate resins such as copolymer polycarbonate with bisphenol A.

Generally, a polycarbonate resin has a drawback that birefringence tends to increase. That is, optical anisotropy due to molding distortion and local orientation tends to occur inside the molded body. Therefore, when using a polycarbonate-based resin in the present invention, it is important to prevent the formation of optical anisotropy as much as possible, and as a countermeasure, the fluidity is high and it is difficult to receive excessive shearing force during molding. It is preferable to use a resin having a relatively low degree of polymerization that hardly causes residual distortion and local orientation. In the present invention, it is particularly recommended to use a polycarbonate resin having a polymerization degree of 120 or less, more preferably a polymerization degree of 100 or less. The drawback of the polycarbonate resin that the birefringence tends to be large is that a thin film layer made of a curing agent of an acrylic urethane resin main agent and an isocyanate compound is formed on the surface of the polycarbonate layer forming the objective surface of the objective lens. preferable.

The photochromic dye specified in the present invention will be described below. The light control function is imparted by using a light control pigment. For the type of light control pigment used in the present invention,
Spiropyran, naphthopyran, furan, spirooxazine, fulgide, chromene, etc. are not particularly limited as long as they are commonly used. Are preferably as colorless as possible and have a fast decoloring speed, and good in terms of short- and long-term durability under processing conditions such as heat, light, and humidity, practical conditions, and storage conditions.
Since brown and gray are generally preferred as the hue after color development, usually use a plurality of dimmable materials at the same time, determine the usage ratio and amount of each material so that it becomes the desired hue, hand blend method or It is preferable to blend and apply by an addition method such as a kneading method, a processing method such as a dyeing method or a coating method. Further, by adding a dye selected from the group of dimmable dyes described above to a transparent ink made of a transparent colorant,
A means for printing on the surface of the cellulose triacetate film may be used.

Next, the coloring dye used in the present invention and the blending or applying method of the dye will be described. Any of pigments, dyes, and pigments for personal use may be used, but general dyes are more preferable in terms of high transparency after complementary colors. The type of the dye or pigment used in the present invention is not particularly limited as long as it passes the above long-term durability. In general, azo series, anthraquinone series, indigoid series, triphenylmethane series, xanthene series, oxazine series dyes and the like are included. The pigments include organic pigments such as phthalocyanine, quinacridone, and azo, and inorganic pigments such as ultramarine blue, chrome green, and cadmium yellow. Among these, they are selectively used as complementary colorants.

In the present invention, these complementary colorants are added to one or both of the surfaces of the polycarbonate resin film layer constituting the polarizing composite sheet. Even if it sees, it is because a polarizing film layer is complementary color.) Or it mixes with either the addition method after kneading, or the dyeing method, either in the polycarbonate resin film or the cellulose triacetate film layer. To do. In general, the polycarbonate resin film layer is often kneaded because of easy control of the blending amount. In addition, at least the method of the present invention can be applied to a surface or the inner surface of a dye for complementary color scientifically or physically by dyeing, entrapping or diffusing at a relatively low temperature. It can be preferably used.

In addition, a method for providing a correction function for the vision correction region to the optical composite molded article of the present invention will be described below. Depending on the mold, such as an arburg all-round mold, the diameter is 60 to 98 mmφ, the radius of curvature is 60 to 87 mm, and the cavity thickness is 3 to 18 mm.
Can be suitably used as a method for imparting power for myopia. The refracting surface of the first surface of the cavity (the surface opposite to the eye in the wearing state, that is, the front refracting surface)
A spherical surface is adopted for ease of processing. The second refracting surface (the eyepiece side surface in the worn state, ie, the rear refracting surface) is not only a spherical surface but also a toric surface for correcting astigmatism and the like. Hereinafter, a lens in which a spherical surface is employed for the first surface is referred to as a spherical lens, and a lens in which an aspheric surface is employed for the first surface is referred to as an aspheric lens. In general, the refractive power of a lens is expressed in units of diopter (hereinafter referred to as “D”), and the refractive power (surface refractive power) at the surface of the lens is the curvature ρ of the surface.
(Unit: m ⁻¹ : radius of curvature R = 1 / ρ) and the refractive index n of the lens material, the following formula (1)
Is defined as follows. Surface power = (n−1) × ρ = (n−1) / R (1)
The refractive power of the first surface of the lens is particularly called a base curve. Hereinafter, the curvature corresponding to the base curve is referred to as the base curve curvature. The power for myopia is mainly determined by the refractive power of the first surface and the refractive power of the second surface. For this reason, depending on the combination of the two refractive powers, various base curve values can be obtained to obtain one myopic power.

The method for imparting presbyopia power to the optical composite molded article of the present invention is such that the inner surface of the mold cavity is concave and the outer surface is convex, and the cavity has various shapes. . A design selected from the group of clip top type, seamless clip top type, ideal type, and progressive type can be conveniently selected and used.
The outer surface of the small ball portion is particularly preferably an aspherical surface. The outer surface of the small ball portion may be an aspherical surface in which a cross section in a normal direction passing through the center thereof is formed by a curve (preferably an ellipse) such as an ellipse, a hyperbola, a parabola, a cycloid curve, or an involute curve.

According to the method of the present invention, a polycarbonate resin film is bonded to both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate films via an adhesive base layer, and a cellulose acetate film is attached to the inner surface of the polarizing element. A polarizing composite sheet composed of a polycarbonate resin film on only one of the conventional cellulose acetate films is obtained by obtaining a polarizing composite sheet that is composited as a protective layer and has a polycarbonate resin film layer formed on the outer surface. The polarizing laminate sheet warps to one side due to the curling that occurs when annealing heat is applied at 90 to 120 ° C. for 30 to 120 minutes in an annealing process that is absolutely necessary to remove residual strain. The phenomenon of the cellulose triacetate film in the polarizing composite sheet By sticking a polycarbonate resin film on the side, the phenomenon of curling during annealing is canceled by the polycarbonate resin film stuck on both sides, so the occurrence of warpage can be suppressed to substantially zero, so it matches the time of the bending process. Thus, the workability for performing the die-cutting process is improved, and the problem of incurring economic loss to the business operator can be solved, and a high-quality and inexpensive optical composite molded product can be provided.

In addition, a cellulose triacetate film and a polycarbonate resin film are bonded via an ultraviolet curable adhesive composed of a main component of a polyisocyanate compound and a curing agent of a polyol compound specified in the present invention, and melted in a polycarbonate resin film layer. Since it is possible to form a polycarbonate resin film layer that can be integrally fused, it is necessary to select an optical resin for injection molding with an adhesive and an adhesive for melting and pressing in a mold at a high temperature. Can alleviate the problem of compromising business operators and incurring economic losses, and provide high-quality and inexpensive optical molded products.

In the present invention, since the object surface and the face surface are the same polycarbonate resin, the surfaces of the object surface and the face surface are different from each other as in the inventions described in the cited documents 1 to 3, so that the object surface and the face surface are in close contact with the uneven surface. In order to provide a top coat on top of the primer coat layer to be applied, the occurrence of defects such as dust and dirt when dipping twice is reduced, and it has been widely used in the market for acrylic and polycarbonate lenses. The problem of forcing the operator to economic loss can be greatly alleviated because only one dip of the strengthening liquid is required.

Hereinafter, preferred embodiments of the present invention will be described in detail.

The thickness obtained by adhering a 0.08 mm cellulose triacetate film to both sides of a 0.02 mm thick polarizing film made of polyvinyl alcohol with a polarization degree of 99.95% using a dye-based dye is about 0. A polycarbonate resin having a thickness of 0.123 mm and a polymerization degree of 120 or less, 1,1′-dihydroxydiphenyl- Polycarbonate resin film composed of a homopolycarbonate of phenylmethylmethane, 1,1′-dihydroxydiphenyl-diphenylmethane, 1,1′-dihydroxy-3,3′-dimethyldiphenyl-2,2-propane and a copolymer polycarbonate of bisphenol A (Registered by General Electric Lexan 8010 The target), the main component, was composed of a curing agent ultraviolet curing type adhesive (LOCTITE product number 3311 registered trademark Henkel Japan Ltd.) was stuck adopted as an adhesive base layer. The formulation of the adhesive is the main agent 100, the curing agent 15, and the diluent (ethyl acetate) 190 by weight ratio. Applying with a dry laminating machine at a processing speed of 140 m / min, and simultaneously irradiating with ultraviolet rays while adhering to the polycarbonate resin film, and adhering to the other cellulose triacetate film and the polycarbonate resin film in the same manner. A sheet was obtained. In order to remove the residual distortion of this polarizing laminated sheet, annealing treatment at 100 ° C. for 45 minutes was performed using a vacuum dryer. The polarizing composite sheet after the annealing treatment was almost flat, and the occurrence of warpage was substantially zero.

The polarizing composite sheet is commercially available and can be used for general purposes. For example, Konica Minolta KC series, Fuji Film "Fujitac" (trade name)
Etc. As the adhesive, a commercially available product can be used as long as it is suitable for adhering to a cellulose triacetate film or a polycarbonate resin film. For example, Clear Luchu (registered trademark) MA21 manufactured by Adel Co., Ltd. can be used.
In addition, an ultraviolet curable adhesive comprising a main component of a polyisocyanate compound and a curing agent of a polyol compound can be used. The thickness for applying these adhesives on both sides of the polarizing sheet is about 0.1 to 100 μm, preferably about 0.5 to 80 μm. In addition, as a method of applying the adhesive on both surfaces of the polarizing sheet, various known methods such as a method of passing the polarizing sheet while supplying the adhesive between the rollers, a method of applying by a dispenser, screen printing, etc. A transparent ink colored in gray that has been adjusted to a total light transmittance of 18% is printed on the surface of both cellulose triacetate film layers of this polarizing composite sheet using a gravure printing machine. Then, a polycarbonate resin film layer was stuck in the same manner as in the previous section to obtain a complementary composite polarizing sheet.

The thickness obtained by adhering a 0.08 mm cellulose triacetate film to both sides of a 0.02 mm thick polarizing film made of polyvinyl alcohol with a polarization degree of 99.95% using a dye-based dye is about 0. A polycarbonate resin having a thickness of 0.5 mm and a polymerization degree of 120 or less, 1,1'-dihydroxydiphenyl-, on one cellulose triacetate film layer of a polarizing sheet (manufactured by Polatechno) having a total light transmittance of 18 mm of 38% Polycarbonate resin film composed of a homopolycarbonate of phenylmethylmethane, 1,1'-dihydroxydiphenyl-diphenylmethane, 1,1'-dihydroxy-3,3'-dimethyldiphenyl-2,2-propane and a copolymer polycarbonate of bisphenol A (Regex Electric Lexan 8010 registered trademark) In addition, an ultraviolet curable adhesive (LOCTITE product number 3311 registered trademark, manufactured by Henkel Japan Co., Ltd.) composed of a main agent and a curing agent was employed as an adhesive base layer and adhered. The formulation of the adhesive is the main agent 100, the curing agent 15, and the diluent (ethyl acetate) 190 by weight ratio. Applying with a dry laminating machine at a processing speed of 140 m / min, and simultaneously irradiating with ultraviolet rays while adhering to the polycarbonate resin film, and adhering to the other cellulose triacetate film and the polycarbonate resin film in the same manner. A sheet was obtained. Next, the polarizing composite sheet obtained in the previous section was cut into an elliptical shape, mounted in a hot press mold having an uneven surface adjusted to a 6R spherical body, and pressed into a lens shape by pressing at 120 degrees for 2 minutes. . The obtained polarizing lens passed the standard of JISST-8147.

The polarizing composite sheet obtained in Example 1 was punched out and pressed at 120 ° C. for 2 minutes with a hot press mold (manufactured by Tori Glass Co., Ltd.) to form a sheet-like spherical body. Thereafter, the sheet-like spherical body was formed into an burglar all-round mold of a lens molding machine (clamping force; injection pressure: 400 kgf / cm ² ); diameter 78 mmφ, radius of curvature 84 mm, cavity thickness = 2.2 mm mold temperature; Installed in a mold at 120 ° C (both fixed and movable), injection-molded polycarbonate resin (Teijin Chemicals Panlite SP) similar to the polycarbonate resin film layer is injection-molded at a cylinder heater set temperature; (Seiko Kasei HC-280) was dipped and dried at 120 ° C. for 2 hours to obtain the desired optical composite molded product. This optical composite molded product passed the standards of the industrial standard JIS, T-8147.

A lens-shaped sheet-like spherical body is cut out from the polarizing composite sheet formed as described above, and formed into a shape corresponding to the convex or concave surface of the polarizing lens to be manufactured by hot pressing or the like. .
The lens can be formed on the surface of the molded body by a conventionally known method. For example, the sheet-like spherical body may be bonded to the surface of a glass or resin lens using the above-mentioned adhesive, or the molded body is housed in a lens-molding mold, and the sheet-shaped spherical body is accommodated. A lens may be injection molded on one side of the body. In the case where the molded body is bonded to the surface of a glass or resin lens, the above-described adhesive may be used.
Thereafter, annealing is performed by heating the lens at 90 to 120 ° C. for 30 to 120 minutes.

One of the polarizing composite sheets obtained from Example 1 or Example 2 was mixed with a 4: 1 mixture of isocyanate with acrylic urethane resin (High Art 240-3723) as the main agent, and stirred for 10 minutes. The thin film layer having a thickness of about 0.1 μm was formed by applying it at a processing speed of 140 m / min using a laminating machine. By using the same means as in Example 2 or Example 3 for the polarizing composite sheet having the obtained thin film layer, an optical composite product was prepared. The produced optical composite did not cause red spots or blue spots by visual inspection.

Add the appropriate amount of auxiliary materials such as stabilizers, fillers, antistatic agents, etc. that are usually used in the main raw material plastic, ie cellulose acetate propionate (manufactured by Eastman Chemical), and spirooxazine The compound is added. Using a material obtained by thoroughly mixing and kneading these, a light controllable thin film layer was applied to the surface of the optical composite molded product obtained in Example 2 by a dipping method. This light-modulating thin film layer changes from a nearly colorless state to a brownish or grayish slightly dark color when exposed to ultraviolet rays, and the visible light transmittance is reduced from about 38% to about 20% to 25%. In addition, the visible light transmittance is restored from about 20% to 25% to the original level of about 38% if it is not exposed to ultraviolet rays.

Although the embodiments of the present invention have been described, the present invention is not limited to the above embodiments.
For example, the polarizing composite sheet is one in which polycarbonate resin films are attached to both surfaces of the polarizing sheet one by one, but a plurality of polycarbonate resin films can be laminated and attached. Also in this case, the above-mentioned adhesive may be used for bonding the polycarbonate resin films. In addition, a method for imparting a light control function to a polarizing composite sheet with a light control dye is known in Japanese Patent Application No. 2000.
As shown in −133845, means for mixing in an adhesive or a pressure-sensitive adhesive may be used. Further, as a method for imparting a light control function to the optical composite molded article, it is preferable to use the means shown in the known patent No. 3852612 or utility model registration No. 3132376. In general, it is preferable to use a plurality of dimmable materials at the same time and determine the usage ratio and amount of each material so that the desired hue is obtained.

  In the present invention, a polycarbonate resin film is bonded to both surfaces of a general-purpose polarizing sheet in which a polarizing element is sandwiched between cellulose triacetate films via an adhesive base layer, and a cellulose triacetate film and an outer surface are combined with a cellulose triacetate film. By forming, a polarizing laminated sheet composed of a polycarbonate resin film on only one of the conventional cellulose triacetates is an annealing treatment that is absolutely necessary for removing residual strain, and is performed at 90 to 120 ° C. for 30 minutes to 120 minutes. The phenomenon that the polarizing laminated sheet warps to one side by curling that occurred when applying heat of contraction for a minute, by sticking a polycarbonate resin film to both cellulose triacetate films in the polarizing composite sheet of the present invention. , Curling during annealing Since the polycarbonate resin film stuck to both sides cancels each other out, the occurrence of warpage can be suppressed to substantially zero, improving the workability of performing the die-cutting process so that it coincides with the bending process. In addition, it can solve the problem of incurring economic loss, and can be suitably applied to the manufacture of a polarizing lens having excellent polarization and impact resistance. Further, the polarizing composite sheet of the present invention is not limited to the polarizing lens for sunglasses and front spectacles, but can be applied to other fields such as a liquid crystal display.

Claims (12)

A polarizing sheet used in a method for manufacturing a spectacle lens, in order to protect both surfaces of a polarizing element, a polycarbonate resin film and an adhesive base layer on both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate film layers. A polarizing composite sheet comprising a cellulose triacetate film layer formed on the inner surface and a polycarbonate resin film layer formed on the outer surface. 2. A method for producing a polarizing composite sheet, wherein the polarizing composite sheet according to claim 1 is obtained by a laminating method. An optical composite molded article, wherein the polarizing composite sheet according to claim 1 is formed into a lens shape by a Benling method. A polarizing sheet used in a method for manufacturing a spectacle lens, in order to protect both surfaces of a polarizing element, a polycarbonate resin film and an adhesive base layer on both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate film layers. Injection molding that can be fused and integrally fused to the polycarbonate resin film layer by an injection molding method on one side of the polarizing composite sheet that is bonded via the cellulose acetate film layer on the inner surface and the polycarbonate resin film layer on the outer surface. A method for producing a composite molded article for optics, characterized by forming a material. A polarizing sheet used in a method for manufacturing a spectacle lens, in order to protect both surfaces of a polarizing element, a polycarbonate resin film and an adhesive base layer on both surfaces of a general-purpose polarizing sheet sandwiched between cellulose triacetate film layers. Injection molding that can be fused and integrally fused to the polycarbonate resin film layer by an injection molding method on one side of the polarizing composite sheet that is bonded via the cellulose acetate film layer on the inner surface and the polycarbonate resin film layer on the outer surface. Optical composite molding characterized by the formation of materials. 4. A dimming / polarizing composite sheet, wherein a dimming function is imparted to the surface of the outermost layer of the polarizing composite sheet according to claim 1 by a dimming dye. A dimming composite molded product for optical use, wherein a dimming function is imparted to the optical composite molded product according to claim 4 by a dimming dye. 8. The optical composite molded article according to claim 4 or the optical dimmable composite molded article according to claim 7, wherein a correction function for a vision correction region is provided. A polarizing composite sheet, which is color-printed with a transparent ink made of a transparent colorant on both sides of the cellulose triacetate film according to claim 1 and has complementary color layers for correcting a wide variety of hues or patterns on the polarizing film. 10. A polarizing composite sheet, wherein the polycarbonate resin film layer according to claim 1 is a thermoplastic resin film other than polycarbonate resin. A thin film layer comprising a curing agent of an acrylic urethane resin-based main agent and an isocyanate compound is formed on one surface of the polarizing composite sheet according to claim 1 to 10 to reduce the occurrence of birefringence. Polarized composite sheet. 11. A polarizing composite sheet, wherein one polycarbonate resin film layer of the polarizing composite sheet according to claim 1 has a refractive index of 1.60 or more.