JP2011180266A - Polarizing laminate, polarizing lens, and polarizing spectacles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive polarizing laminate, a polarizing lens which is inexpensive and has a high polarization degree and a small distortion, and polarizing spectacles which are inexpensive, have a high polarization degree and have no optical distortion. <P>SOLUTION: The polarizing laminate is characterized by arranging a protective function part on one side of a linear polarization function part and a thermal bonding function part on the other side. Such a novel polarizing laminate that the linear polarization function part is a linear polarizer, the protective function part is one of a cast molded sheet, a stretched and oriented sheet and an extrusion molded sheet whose thickness is 0.25 mm or less and the thermal bonding function part is an extrusion molded thermal bonding sheet is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an inexpensive polarizing laminated plate, an inexpensive polarizing lens using the polarizing laminated plate, and an inexpensive and high-quality polarizing glasses in which the polarizing lens is framed.

  A laminated structure in which a polarizer is sandwiched between two reinforcing transparent resin sheets is sometimes called a polarizing plate, and is incorporated in an LCD panel and consumed in large quantities.

  When optical distortion exists in the plane of the reinforcing transparent resin sheet, the degree of polarization of the polarizing plate is lowered or the degree of polarization unevenness occurs. Further, when such polarizing plates are overlapped to form a crossed Nicol, light leakage occurs or color unevenness occurs. Therefore, the reinforcing transparent resin sheet is a sheet having no optical distortion, or is a sheet that is stretched in a certain direction and has uniform optical distortion in a certain direction (sometimes referred to as a retardation sheet). Is needed.

  A cast molded sheet is known as a sheet having no optical distortion, and a cast molded sheet polymerized between plates and a sheet cast molded by a casting desolvation method are known. Industrially, a TAC sheet prepared from a triacetylcellulose (TAC) solution by a casting desolvation method is well known, and is consumed in large quantities as a transparent resin sheet for reinforcing a polarizing plate for LCD.

  Moreover, as a sheet | seat extended | stretched to the fixed direction, there exist a polycarbonate resin sheet (patent document 1) and a polyamide resin sheet (patent document 2), and the polarizing plate made from them is mainly used for polarizing lenses.

  If the polarizing plate is punched into a lens shape, it becomes a polarization flat lens, and if the polarization flat lens is heat-bent, it becomes a polarization bending lens.

  If a polarizing bending lens is inserted into a mold of an injection molding machine and injection molding is performed to back up a transparent resin on the concave surface side, a thick polarizing lens with a curved surface is obtained. The thick lens has a large bending rigidity and has a power to protect the eyes from being hit.

  If these polarizing lenses are fitted to the spectacle frame, polarized glasses are completed.

  Polarized glasses have excellent ability to shield light reflected from the road surface, water surface, etc., so they are used extensively not only as sunglasses but also as corrective glasses as anti-glare glasses suitable for outdoor activities such as driving, fishing and baseball. Yes.

JP-A-8-52817 WO 2006/040954

  The inter-plate polymerization method for producing a cast molded sheet requires a series of operations such as assembly of a mold for casting, injection of a monomer, polymerization, and mold release, for example, taking a PMMA sheet as an example. Yes, it is inconvenient, so it is inefficient. In addition, the casting desolvation method found in the TAC sheet requires precise equipment and precise process control in order to control the sheet thickness, and the incidental facilities such as solvent recovery become enormous. Therefore, a sheet that can be produced by the cast molding method, regardless of the inter-plate polymerization method or the casting desolvation method, is expensive.

  In addition, since the TAC sheet has poor thermal bondability with other resins, it is generally difficult to injection-mold the backup resin into a thick lens.

  A sheet having directionality in optical distortion stretched in a certain direction with respect to a cast molded sheet is a simple production method, for example, by extruding an extruded polycarbonate resin sheet or polyamide resin sheet several times in a uniaxial direction. The thermal bondability with other resins is generally excellent. However, there is a problem that the optical distortion is easily disturbed due to uneven thickness in the width direction and the long direction, uneven cooling, and uneven stretching, and the yield is difficult to increase.

  In addition, when the back-up resin is injection molded into a thick lens, there is a difference in the heat shrinkage rate between the stretching direction of the sheet constituting the polarizing plate and the direction perpendicular to the stretching direction. There is a problem that the curve of the thick lens becomes distorted or uneven between the lenses.

  As a result of intensive studies on such problems, an inexpensive polarizing laminate particularly useful for a polarizing lens, an inexpensive polarizing lens using the polarizing laminate and a non-uniform curvature lens, and an inexpensive and high quality using the polarizing lens. Invented polarized glasses.

  In order to solve the above problems, the following means have been invented.

  First, in the polarizing laminate, in which the protective functional part is disposed on one side of the linearly polarizing functional part and the thermal bonding functional part is disposed on the other side, the linearly polarizing functional part is a linear polarizer. The protective functional part is either a cast molded sheet, a sheet that has been subjected to a stretch orientation treatment, or an extruded sheet having a thickness of 0.25 mm or less, and the thermal bonding functional part is a heat bonded sheet that is extrusion molded. There is to be.

  Furthermore, the cast molded sheet is to be a polarizing laminate that is a sheet of any of polycarbonate resin, polyamide resin, polyester resin, polyacrylic resin, polycycloolefin resin, polyurethane resin, and acylcellulose resin.

  Further, the stretched and oriented sheet is made of a polycarbonate resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polycycloolefin resin, or a polyurethane resin, which has been stretched within a range of a stretch ratio of 1.05 to 4.5 times. The object is to make a polarizing laminate that is an extruded sheet.

  Further, the extruded sheet having a thickness of 0.25 mm or less is a polarizing laminate in which the sheet is one of a polycarbonate resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polycycloolefin resin, and a polyurethane resin. It is in.

  Furthermore, the heat-bonded sheet formed by extrusion is a polarizing laminate that is a sheet of any one of polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacrylic resin, and polycycloolefin resin.

  Furthermore, the thermal bonding function is to make a polarizing laminate complemented by a thermal bonding coating layer provided on the thermal bonding side.

  Furthermore, the thermal bonding coating layer is a polarizing laminate in which any one of polyurethane resin, polythiourethane resin, epoxy resin, polyvinyl acetate resin, and polyacrylic resin is used.

  Furthermore, the polarizing laminate is a bent product, in which a protective functional portion is a convex side and a heat bonding sheet is a concave side.

  Furthermore, another object is to provide a polarizing lens in which a backup resin is injection-molded in the thermal bonding function portion of the polarizing lens.

  Furthermore, the backup resin is a polarizing lens that is any one of polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacrylic resin, and polycycloolefin resin.

  Further, another object of the present invention is to provide polarizing glasses that frame the polarizing lens with the protective sheet side as the objective side and the thermal bonding sheet side as the eyepiece side.

According to the present invention, a polarizing laminate having a linearly polarizing functional part, a protective functional part, and a thermal bonding functional part is disclosed, and by optimally selecting a protective functional part sheet and a thermal bonding functional part thermal bonding sheet, An inexpensive polarizing laminate can be produced.
By bending the polarizing laminate, a polarizing lens that is inexpensive, has a high degree of polarization, and has little distortion can be obtained.
Furthermore, by injection molding a back-up resin on the heat-bonded functional part of the bent polarizing lens, a polarizing lens that is inexpensive, has a high degree of polarization, and has little distortion can be obtained.
Furthermore, by placing the polarizing lens backed up with resin in a spectacle frame, it has become possible to produce polarized spectacles that are inexpensive, have a high degree of polarization, and have little optical distortion.

1 is a schematic cross-sectional view of a polarizing plano lens obtained in Example 11. FIG. FIG. 2 is a schematic cross-sectional view of the polarizing plano lens obtained in Example 12. FIG. 3 is a schematic cross-sectional view of the polarizing plano lens obtained in Example 13. FIG. 4 is a schematic cross-sectional view of the polarizing plano lens obtained in Example 14. FIG. 5 is a schematic cross-sectional view of the polarized plano lens obtained in Example 15. FIG. 6 is a schematic cross-sectional view of the polarizing plano lens obtained in Example 16.

  One of the present invention (hereinafter referred to as the first invention) relates to a polarizing laminate.

  That is, in the polarizing laminate having a protective functional part disposed on one side of the linearly polarizing functional part and a thermal bonding functional part on the other side, the linearly polarizing functional part is a linear polarizer. The protective functional part is either a cast molded sheet, a sheet that has been subjected to a stretch orientation treatment, or an extruded sheet having a thickness of 0.25 mm or less, and the thermal bonding functional part is a heat bonded sheet that is extrusion molded. It is a novel polarizing laminate.

  In the first invention, there are four cases from the first to the fourth, which will be sequentially described below.

  The first case of the first invention is a case of a polarizing laminate in which the linearly polarizing functional part is a linear polarizer, the protective functional part is a cast molded sheet, and the thermal bonding functional part is an extrusion molded thermal bonding sheet. .

  The linear polarizer is usually a uniform resin sheet having a thickness of 0.1 mm or less. Very generally, it is a uniaxially stretched sheet of polyvinyl alcohol resin such as polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral.

  In order to obtain a high degree of linear polarization, the film is stretched at a magnification of about 2 to 5 times and doped with iodine or a dichroic dye.

  The iodine doping method using iodine is less likely to give a unique color to the polarizer than the dye doping method using a dye, and has a characteristic that a high degree of polarization is easily obtained, but uses iodine that is easily sublimated. Therefore, there is a disadvantage that the heat resistance is inferior. On the other hand, the dye doping method has higher heat resistance than the iodine doping method, but has a problem that a hue unique to the dye appears in the polarizer and a problem that the degree of polarization differs depending on the dye, that is, the hue.

  As will be described later, in the present invention, the polarizing laminate is bent to make a polarizing lens, and the concave surface side is backed up with a resin by an injection molding method. Depending on the heat applied during processing and the heat applied during injection molding of the backup resin, iodine may sublimate and the degree of polarization may decrease. Therefore, in this invention, it is recommended that it is a dye dope method polarizer with high thermal stability.

  The cast molded sheet is generally a sheet made by an inter-plate polymerization method and a sheet made by a casting desolvation method.

  In the inter-plate polymerization method, monomers, for example, (meth) acrylates mainly composed of methyl methacrylate are injected between glass plates facing each other with a narrow clearance, sealed, and plate-shaped with heat or actinic rays such as UV rays. Alternatively, it is a method of polymerizing and curing in a sheet form.

  As an inter-plate polymerization method sheet preferably used in the present invention, an acrylic resin sheet is common.

  In addition, aromatic polyisocyanates such as tolylene diisocyanate (TDI), metaxylylene diisocyanate (MDI), diphenylmethane-4,4′-diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, and ethylene Mixing with aliphatic glycols such as glycol and 1,3-propane glycol, polyether glycols such as polyethylene glycol and polypropylene glycol, and polyols such as polyester glycols such as caprolactone and adipate There is a polyurethane resin sheet filled in and thermally polymerized.

  A representative example of the casting desolvation method sheet is an acyl cellulose sheet. Acyl celluloses such as triacetyl cellulose (TAC), diacetyl cellulose, tripropyl cellulose, and dipropyl cellulose are dissolved in, for example, acetone or methylene chloride to form a solution. Next, the solution is cast onto a belt or a flat plate, and the solvent is removed by heating or decompression to form a sheet. A triacetyl cellulose sheet including a TAC sheet is particularly preferably used. A polycycloolefin resin sheet produced by a solution casting method is also preferably used.

  These sheets are often added with stabilizers such as ultraviolet absorbers and antioxidants.

  The preferred thickness of the cast molded sheet is about 0.03 to 1.0 mm, more preferably about 0.05 to 0.8 mm. If the thickness is less than 0.03 mm, it is difficult to make a sheet. On the other hand, if the thickness exceeds 1.0 mm, it may be difficult to bend the polarizing laminate as described later.

  Thermal bonding sheets are polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacryl resin, polycycloolefin resin, polystyrene resin, polyvinyl chloride resin, polystyrene resin, polystyrene / methyl methacrylate resin, polyacrylonitrile / styrene resin, poly It is a transparent extruded sheet of 4-methylpentene-1 resin or the like or a polymer alloy resin thereof.

  Among these, a sheet of polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacrylic resin, polycycloolefin resin, or a polymer alloy resin thereof is recommended because of easy sheet production.

  As the polycarbonate resin, an aromatic polycarbonate resin mainly composed of aromatic phenols such as bisphenol A, and a polymer alloy of an aromatic polycarbonate resin and a polyester resin are preferable because the physical strength of the sheet is high.

  Among them, a polycarbonate resin mainly composed of bisphenol A and having a viscosity average molecular weight of 15000 or more, preferably 18000 or more is particularly recommended since it is excellent in sheet strength and toughness.

  Polyamide resin is a polyamide that is polycondensed from alicyclic or aliphatic dicarboxylic acid and alicyclic or aliphatic diamine as main components. It is amorphous, highly transparent, and has hardness, strength, and toughness. A polyamide resin is preferred.

  In view of the necessity for high transparency, amorphous nylon or polyamide called transparent nylon is preferably used. Typical examples include “GRILAMID” TR-55 and “Grillamide” TR-90 manufactured by EMS CHMEMIE, “TROGAMID” CX-7323 manufactured by HULS, and the like. Transparent nylon is generally characterized by less optical anisotropy than polycarbonate resin. Moreover, it is said that solvent resistance is higher than polycarbonate resin, and is excellent in solvent crack resistance.

  The polyester resin is preferably a polyester resin of a dicarboxylic acid having an aromatic dicarboxylic acid as a main component such as terephthalic acid and a diol having an aliphatic diol as a main component in terms of hardness, strength, toughness, and transparency. Used.

  Polyurethane resin is a diisocyanate mainly composed of aromatic diisocyanate and alicyclic diisocyanate, and polyurethane resin mainly composed of aliphatic diol. It has hardness, strength and toughness, and is less susceptible to crystallization. A highly flexible polyurethane resin is preferred.

  Preferred examples include BASF's polyester polyurethanes “ELASTOLLAN” ET590, “Elastollan” ET595, “Elastollan” ET598, and their polyether polyurethanes.

  As the polyacrylic resin, a methacrylate polymer or a copolymer mainly composed of methacrylates such as methyl methacrylate and cyclohexyl methacrylate is preferably mentioned from the viewpoint of hardness, strength and transparency.

  The polycycloolefin resin generally has a small birefringence, and a sheet with small optical anisotropy is easily obtained. As representative cycloolefin resins and cycloolefin copolymer resins, ZEON's “ZEONEX” and “ZEONOR”, JSR's “ARTON”, Hitachi Chemical's “OPTOREZ”, Mitsui Chemicals' “APEL”, Sekisui Chemical's “ESSINA” is an example.

  The thermal bonding sheet must be thermally bonded to the backing resin without losing transparency, and has thermal bonding suitability such as molecular mixing with each other. It is preferable that the resin is of the same system, or one of the thermal bonding sheet and the resin to be backed up is a polyurethane resin that exhibits excellent thermal bonding ability for many resins.

  These thermal bonding sheets are often added with stabilizers such as ultraviolet absorbers and antioxidants.

  The thermal bonding sheet is made by an extrusion method. In the extrusion molding method, the molten resin is generally extruded into a sheet from a slit-shaped die attached to an extruder, taken up with a roll, and the cooled sheet is wound into a roll.

  Extruded heat-bonded sheets used in the present invention need only have a uniform and uniform appearance such as sheet thickness and surface smoothness, and may have a retardation value (birefringence × sheet thickness) or letter. Various characteristics related to optical distortion such as unevenness of foundation are not particularly problematic.

  That is, in the process from the die to the winding, whether the sheet is uniaxially stretched or biaxially stretched or not essentially stretched, the polarizing lens of the present invention (that is, the polarized lens after bending) In any of the polarized lenses after injection molding of the backup resin), the inventors have found that a high degree of polarization can be obtained and that there is no unevenness in the degree of polarization which is an impediment in practical use.

  However, comparing the stretched heat-bonded sheet and the heat-bonded sheet that is essentially unstretched, in the case of the stretched heat-bonded sheet, when bending to make a polarizing lens or when injection molding a backup resin Furthermore, it has been found that the heat bonding sheet causes heat shrinkage in the direction opposite to the stretching direction due to the applied heat, and the polarization lens curve is distorted.

  Therefore, it is recommended that the thermal bonding sheet is a thermal bonding sheet that is not subjected to a stretching treatment as much as possible.

  The preferable thickness of the heat bonding sheet is about 0.01 to 1.0 mm, more preferably about 0.02 to 0.8 mm. If the thickness of the sheet is less than 0.01, the thermal bondability with the backup resin tends to be inferior. If the thickness exceeds 1.0 mm, the polarizing laminate may be difficult to bend.

  In general, a polarizing laminate is produced by laminating a cast molded sheet, a linear polarizer, and a heat bonding sheet in this order, and affixing the layers using an adhesive or an adhesive.

  Adhesives or adhesives need long-term durability against water, heat, light, and the like. As an example of the adhesive, when the isocyanate compound is used to react with the hydroxyl group of each sheet and the hydroxyl group of the polarizer, when a mixture of (poly) isocyanate compound and (poly) ol compound is used, (meth) acrylic compound is used. In some cases, polyurethane resin, polythiourethane resin, epoxy resin, vinyl acetate resin, acrylic resin, wax or the like may be used together with a solvent or resin alone. Examples of the adhesive include vinyl acetate resin and acrylic resin.

  In sticking, these adhesives or pressure-sensitive adhesives are uniformly applied to a cast molded sheet, a linear polarizer, or a heat bonding sheet by a general application method such as a gravure coating method or an offset coating method.

  The thickness of the adhesive layer or the pressure-sensitive adhesive layer is usually 0.1 to 100 μm, preferably 0.5 to 80 μm. When the thickness of the adhesive layer or the pressure-sensitive adhesive layer is less than 0.1 μm, the bonding force is low, and when it exceeds 100 μm, the adhesive or the pressure-sensitive adhesive may ooze out from the end face of the polarizing plate.

  The second case of the first invention is a case where the linear polarization functional portion and the thermal bonding functional portion are the same as the first case, but the protective functional portion is a polarizing laminate different from the first case.

  That is, this is the case of a polarizing laminate in which the linearly polarizing functional part is a linear polarizer, the thermal bonding functional part is an extrusion molded thermal bonding sheet, and the protective functional part is a stretched and oriented sheet.

  The resin used for the sheet subjected to the stretching and orientation treatment of the second case may be basically the same as the resin of the heat bonding sheet of the first case in polymer characteristics such as composition and degree of polymerization.

  That is, preferred resins for the stretched and oriented sheet are polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacryl resin, polycycloolefin resin, polystyrene resin, polyvinyl chloride resin, polystyrene resin, polystyrene / methyl methacrylate resin. , Polyacrylonitrile / styrene resin, poly-4-methylpentene-1 resin, or the like, or a transparent extruded sheet of the polymer alloy resin.

  Among these, polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacrylic resin, polycycloolefin resin, or a sheet of such a polymer alloy resin is recommended because of the ease of sheet production and stretching treatment. Is done.

  The sheet subjected to the stretching and orientation treatment of the second case is basically made by an extrusion method. That is, it is common to extrude molten resin from a slit-shaped base attached to an extruder into a wide sheet, take it up with a take-up roll, and wind up the cooled sheet into a roll, before or after the take-up roll. In FIG.

  The stretching treatment is usually preferably uniaxially stretched about 1.05 to 5 times, or biaxially stretched about 1.05 to 5 times vertically and horizontally.

  The preferred stretching ratio varies depending on the resin, but the stretching conditions are usually set so that the retardation value (birefringence × sheet thickness) is 300 nm or more, preferably 500 nm or more. If the retardation value is less than 300 nm, the direction of optical distortion tends to be uneven, and the polarization degree of the polarizing lens tends to be low, or the degree of polarization unevenness tends to occur.

  The preferred thickness of the stretched and oriented sheet is about 0.01 to 0.8 mm, more preferably about 0.03 to 0.5 mm. If the thickness is less than 0.01 mm, it is difficult to make a sheet. Also, when making a polarizing lens by bending a polarizing laminate or injection molding a back-up resin, the thermal shrinkage stress of the stretched and oriented sheet is made as small as possible so that the polarizing lens curve is as distorted as possible. In order to prevent this, the thickness is preferably 0.8 mm or less.

  As in the first case, the polarizing laminate of the second case is generally made by sticking a stretch-oriented sheet, a polarizer, and a heat bonding sheet using an adhesive or a pressure-sensitive adhesive. The requirements for the adhesive and the pressure-sensitive adhesive are the same as in the first case of the first invention.

  However, in the second case, the directionality of the linear polarizer and the sheet subjected to the stretch orientation treatment becomes a problem. That is, if the stretching direction of the linear polarizer and the stretching direction of the sheet subjected to the stretching and orientation treatment are not almost completely matched, a decrease in the polarization degree, uneven polarization degree, and uneven color may occur. In the case of a biaxially stretched sheet, the stretching direction with the larger stretching ratio and the stretching direction of the linear polarizer are substantially matched.

  In the third case of the first invention, the linearly polarized light functional part and the thermal bonding functional part are the same as the first and second cases, but the protective functional part is different from the first and second cases. Is the case.

  That is, in the case of a polarizing laminate in which the linear polarization functional part is a linear polarizer, the thermal bonding functional part is an extruded sheet, and the protective functional part is an extruded sheet having a thickness of 0.25 mm or less. .

  In the third case, if the sheet thickness of the protective function portion is 0.25 mm or less, preferably 0.20 mm or less, the sheet may be uniaxially or biaxially stretched in the process from the die to the winding. Or, even if it is not essentially stretched, a polarized lens after bending and a polarized lens made by injection molding a back-up resin can obtain a high degree of polarization and can be a practical impediment. It is characterized by finding a phenomenon without unevenness.

  In addition, it is recommended that the lower limit of the thickness of the sheet having a thickness of 0.25 mm or less is about 0.01 mm, preferably about 0.02 mm, for ease of manufacture.

  The resin used for the extruded sheet with a thickness of 0.25 mm or less is the resin used for the first case heat-bonded sheet, the resin used for the second case stretch-oriented sheet, and a polymer such as composition and degree of polymerization. It may be basically the same in characteristics.

  That is, polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacryl resin, polycycloolefin resin, polystyrene resin, polyvinyl chloride resin, polystyrene resin, polystyrene / methyl methacrylate resin, polyacrylonitrile / styrene resin, poly-4-methyl It is a transparent extruded sheet of pentene 1 resin or the like or a polymer alloy resin thereof.

  Among these, a sheet of polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacryl resin, polycycloolefin resin, or a polymer alloy resin thereof is recommended because of easy sheet production.

  The method of manufacturing an extruded sheet having a thickness of 0.25 mm or less is basically that a molten resin is extruded from a slit-shaped die attached to an extruder into a wide sheet, taken out by a take-off roll, and the cooled sheet is rolled. In general, it is wound into a shape.

  Similar to the first and second cases, the polarizing laminate of the third case also tends to cause thermal shrinkage when bending or injection molding the backup resin, and to make the polarization lens curve distorted. Therefore, it is recommended that the extruded sheet having a thickness of 0.25 mm or less is a sheet that has not been subjected to stretching treatment as much as possible.

  The polarizing laminate of the third case is made by sticking an extruded sheet having a thickness of 0.25 mm or less, a polarizer, and a heat bonding sheet using an adhesive or an adhesive, as in the first case and the second case. It is common. The requirements for the adhesive and the pressure-sensitive adhesive are the same as those of the first case and the second case.

  According to a fourth case of the first invention, in the polarizing laminate, the protective function portion is disposed on one side of the linear polarization function portion, and the heat bonding function portion is disposed on the other side. However, this is the case of the polarizing laminate supplemented by the thermal bonding coating layer provided on the thermal bonding side.

  That is, the linearly polarized light functional part, the protective functional part, and the thermal bonding functional part defined in the first, second, and third cases of the first invention are applied as they are, and the function of the thermal bonding part is applied to the thermal bonding sheet. This is the case of a polarizing laminate supplemented with a coated thermal bonding coating layer.

  More specifically, this can be achieved by providing a thermal bonding coating layer on the thermal bonding sheet of each case in the first, second, and third cases.

  Examples of the resin used for the thermal bonding coating layer include polyurethane resin, polythiourethane resin, epoxy resin, polyvinyl acetate resin, and polyacrylic resin.

  These thermal bonding coating layers are uniformly applied to the thermal bonding sheet by a general application method such as a gravure coating method or an offset coating method.

  The thickness of the coating layer for heat bonding is usually 0.1 to 500 μm, preferably 0.5 to 400 μm. When the thickness of the thermal bonding coating layer is less than 0.1 μm, the adhesive strength is low, and when it exceeds 500 μm, the thermal bonding coating layer oozes or protrudes from the end face of the polarizing lens when a backup resin is injection molded. There are things to do.

  Another invention of the present invention (hereinafter referred to as the second invention) relates to a polarizing lens produced by bending the polarizing laminate disclosed in the first to fourth cases of the first invention.

  There are various methods for bending as described below. In any method, the polarizing laminate before being bent is usually cut into a shape and size that can be easily set in a bending apparatus.

  One method for bending a polarizing laminate is a blow molding method. This method uses a bending apparatus having a recess whose diameter is approximately equal to the size of the lens. With the protective function side of the polarizing laminate facing upward, the polarizing laminate is placed on the recess, and a ring-shaped fixture having a shape substantially equal to the outer periphery of the recess is pressed from above. The polarizing laminate is fixed to the bending device by a ring-shaped fixing bracket.

  Hold the electric heater or infrared heater over the top to heat and soften the polarizing laminate to make it easier to bend.

  When the polarizing laminate reaches a predetermined temperature, compressed air is introduced into the inside of the recess and pressurized from the inside. As a result, the polarizing laminate swells upward and deforms into a lens shape.

  At the time of expansion to the target shape, heater heating is stopped and internal pressurization is stopped. Loosen the pressing of the ring-shaped fixing bracket and take out the bent polarizing laminate from the bending apparatus. If necessary, when an unnecessary portion of the polarizing laminate is cut off, a polarizing lens in which the protective function side is a convex surface and the thermal bonding function side is a concave surface is obtained.

  As another method of bending the polarizing laminate, there is a vacuum forming method. This method is substantially the same as the blow molding method in fixing and heating the polarizing laminate, but differs in that the polarizing laminate is placed on a bending apparatus with the protective function portion facing downward.

  When the polarizing laminate reaches a predetermined temperature, the depression is decompressed from the inside. As a result, the polarizing laminate is drawn downward and deformed into a lens shape.

  When the target shape is drawn, the heater heating is stopped and the decompression is stopped. Loosen the pressing of the ring-shaped fixing bracket and take out the bent polarizing laminate from the bending apparatus. If necessary, by cutting away an unnecessary portion of the polarizing laminate, a polarizing lens in which the protective function side is a convex surface and the thermal bonding function side is a concave surface is obtained.

  As another method of bending the polarizing laminate, there is a pressure vacuum forming method. Technically, this method is a combination of blow molding and vacuum molding.

  There is a pressurization chamber (or decompression chamber) at the top of the polarizing laminate fixed with a ring-shaped fixture, and a decompression chamber (or pressurization chamber) at the bottom. The deformation is more easily performed by adding the bulging deformation and the retraction deformation on the decompression side. The polarizing laminate is set on the apparatus so that the protective function side is on the convex surface.

  The blow molding method, the vacuum molding method and the compressed air vacuum molding method are effective for bending a polarizing laminate having a thickness of about 0.2 mm or less. Thickness unevenness, wrinkles, and cracks easily occur in the processed part.

  Such thickness unevenness, wrinkles and cracks are the protection function part sheet (first case cast molding sheet, second case stretch-oriented sheet, third case extrusion sheet with a thickness of 0.25 mm or less) Or the local elongation of the linear polarizer, which may impair the linear polarization performance.

  Therefore, a bending method of the polarizing laminate that does not cause unevenness in thickness, wrinkles, or cracks in the bent portion is important, and another method for bending the polarizing laminate is disclosed in JP-A-1 There is a method as shown in Japanese Patent No. -22538 (in the present invention, this method is referred to as a suction-type free bending method).

  The suction-type free bending method does not use a ring-shaped fixing bracket used in a blow molding method, a vacuum molding method, or a compressed air vacuum molding method, but is formally close to a vacuum molding method.

  That is, the polarizing laminate is placed unfixed on a mold that is recessed in a curvature shape substantially equal to the bending shape. When the atmospheric temperature and the mold temperature are set to the bending temperature and the pressure is reduced from the bottom of the mold, the polarizing laminate is drawn into the mold until it has the same shape as the mold.

  After the ambient temperature and the mold temperature are lowered to a certain temperature, the polarizing lens is removed from the mold.

  When the suction-type free bending method is applied to bending a polarizing laminate having a thickness of about 0.2 mm or less, there is a problem that wrinkles approach and the yield at which a good polarizing lens is obtained decreases. For polarizing laminates thicker than 2 mm, there is an advantage that bending can be performed relatively smoothly. This is a particularly recommended method for obtaining the polarizing lens of the second invention of the present invention.

  The polarizing lens made according to the second invention of the present invention can be subjected to hard coat processing, antireflection processing, antifogging processing, metallic processing, etc. on the lens surface.

  Another invention of the present invention (hereinafter referred to as the third invention) relates to a polarizing lens in which a back-up resin is injection-molded in the thermal bonding function portion of the polarizing lens disclosed in the second invention.

  The back-up resin injection molding method is a so-called injection molding machine in which the polarizing lens obtained in the second invention is inserted, and the back-up resin is injection-molded on the concave surface side (that is, the thermal bonding function side). This is an insert injection molding method.

  From the viewpoint of productivity, molding precision, etc., an insert injection molding method as disclosed in JP-A-11-245259 is basically preferred.

  That is, this is a method in which a polarizing lens is placed in a mold with the surface to be thermally bonded facing the backup side, and a resin layer to be backed up is insert injection molded. In particular, the injection compression molding method employs a method in which a resin is injected into a mold at a low pressure and then the mold is closed at a high pressure to apply a compressive force to the resin. Optical anisotropy due to mechanical orientation is less likely to occur. Further, by controlling the mold compression force so as to uniformly apply to the resin, the resin can be cooled at a constant specific volume, so that a molded product with high dimensional accuracy can be obtained.

  Suitable resins for backup are polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacryl resin, polycycloolefin resin, polystyrene resin, polyvinyl chloride resin, polystyrene resin, polystyrene / methyl methacrylate resin, polyacrylonitrile / styrene. Resin, poly-4-methylpentene-1 resin, or the like, or polymer alloy resins thereof. Among them, polycarbonate resin, because of ease of injection molding, high bending rigidity, high heat resistance, etc. A polyamide resin, a polyester resin, a polyurethane resin, a polyacrylic resin, a polycycloolefin resin, or a polymer alloy resin thereof is recommended.

  Since the resin to be backed up is required to be thermally bonded to the polarizing lens of the second invention, the resin used for the heat bonding sheet and the resin to be backed up are preferably chemically the same.

  That is, when the heat bonding sheet is a polycarbonate resin, a polycarbonate resin, when it is a polyamide resin, a polyamide resin, when it is a polyester resin, when it is a polyurethane resin, when it is a polyurethane resin, when it is a polyacrylic resin, when it is a polyacrylic resin, When it is an olefin resin, it is preferably a polycycloolefin resin.

  When the resin to be backed up is a polycarbonate resin, it may be thermally bonded to a polyester resin heat bonding sheet.

  Further, when the resin to be backed up is a polyester resin, it may be thermally bonded to a polycarbonate resin thermal bonding sheet.

  In addition, when the resin to be backed up is a polyurethane resin, the resin may be thermally bonded not only to the polyurethane resin but also to a heat bonding sheet having many chemical structures.

  Further, when the thermal bonding function is supplemented by the thermal bonding coating layer disclosed in the fourth case of the first invention, the chemical species of the resin to be backed up may not be so limited.

  When the backed-up polarizing lens has the same thickness throughout the entire lens, it is a so-called plano-polarizing lens that does not have a correction power.

  As the thickness of the plano-polarizing lens increases, negative side refractive power is applied to the line of sight at the end of the lens, and distorted vision tends to occur. As a countermeasure, the optical design that shifts the center of the front and back curves of spherical lenses and toric lenses, and changes the radius of curvature, gradually reduces the thickness toward the lens end face and increases the refractive power on the plus side. It is preferable to cancel the negative side refractive power.

  In the case of a plano-polarized lens, it is recommended that the center thickness of the lens after molding the backup resin is about 0.7 to 3 mm, preferably 0.8 to 2.8 mm. When the thickness is less than 0.7 mm, insert injection molding is difficult, and the reinforcing effect on impact strength may not be sufficient. On the other hand, if it exceeds 3 mm, the lens becomes heavier, and if it is made of eyeglasses, the end of the lens becomes bumpy, resulting in a dark impression.

  Also, by changing the front curve curvature of the polarizing lens made in accordance with the second invention and the back curve curvature of the polarizing lens after backup, a polarization correcting lens with a plus side or minus side power can be made. it can.

  Also, a so-called semi-finished lens (sometimes abbreviated as a semi-lens) can be made, and a correction lens can be made by polishing the backed-up resin portion on the minus side or the plus side.

  The polarizing lens made according to the third aspect of the present invention can be subjected to hard coat processing, antireflection processing, antifogging processing, metallic processing and the like on the lens surface.

  Another invention of the present invention (hereinafter referred to as the fourth invention) is a frame in which the convex surface side of the polarizing lens disclosed in the second and third inventions is the objective side and the concave surface side is the eyepiece side. It relates to the polarized glasses.

  The shape and type of the spectacle frame into which the polarizing lens is fitted are not particularly limited, but those in which the lens is firmly fixed are preferable.

  Polarizers have directionality and block or transmit polarized light depending on their orientation, so when placing emphasis on the purpose of blocking reflected light from the road or water surface, the extension direction of the polarizer is the horizontal direction of the glasses. The polarizing lens is framed in accordance with (that is, the direction connecting the left and right lenses of the glasses).

Example 1
As a linear polarizer, a polyvinyl alcohol sheet (manufactured by Kuraray) was stretched four times in a uniaxial direction in a two-color dye solution, dyed and dried. A polyvinyl alcohol polarizer having a degree of polarization of 99 percent and a thickness of about 30 μm was prepared.

  As a protective function portion, a cast molded sheet was prepared as follows. That is, a polycarbonate resin having a viscosity average molecular weight of 30000 was dissolved in methylene chloride, and the solution was uniformly applied on a glass plate. Methylene chloride was removed from the resulting liquid film to prepare a cast-molded polycarbonate sheet having a thickness of about 0.1 mm.

  A thermal bonding sheet was prepared as follows. That is, the same polycarbonate resin was extruded from a die having a width of 300 mm to prepare a polycarbonate thermal bonding sheet having a thickness of about 0.4 mm and not substantially stretched.

  The urethane-based adhesive was uniformly applied on each side of the cast molding polycarbonate sheet and the polycarbonate heat-bonding sheet with a roll reverse type coating apparatus so as to have a thickness of about 30 μm.

  With the adhesive-coated surface of the polycarbonate thermal bonding sheet as the upper surface, the previously prepared polyvinyl alcohol-based polarizer was laminated and pasted on the adhesive surface. Further, a cast molding method polycarbonate sheet having an adhesive surface on the lower surface was laminated and pasted on the upper surface of the polyvinyl alcohol polarizer. The adhesive was cured by allowing it to stand at room temperature as it was to obtain a polarizing laminate.

  The obtained polarizing laminate was a polarizing laminate having a three-layer structure in which a cast-molded polycarbonate sheet, a linear polarizer, and a polycarbonate heat bonding sheet were attached in this order, and the thickness was about 0.6 mm.

Example 2
The polyvinyl alcohol polarizer of Example 1 was used as the linear polarizer. As the protective function portion, a cast-molded triacetylcellulose sheet having a thickness of about 0.1 mm was used. As a thermal bonding sheet, transparent nylon (Grillamide “TR-90” manufactured by EMS) was extruded to prepare a transparent nylon sheet having a thickness of about 0.4 mm that was not substantially stretched in the same manner as in Example 1. did.

  In the same manner as in Example 1, a cast-molded triacetyl cellulose sheet, a linear polarizer, and a transparent nylon heat bonding sheet were attached to prepare a polarizing laminate having a thickness of about 0.6 mm.

Example 3
The polyvinyl alcohol polarizer of Example 1 was used as the linear polarizer. As a protective function part, a polycarbonate sheet subjected to a stretch orientation treatment was prepared. That is, a polycarbonate resin having a viscosity average molecular weight of 30,000 was applied to an extruder and extruded from a die having a width of 300 mm into a sheet. The film was stretched and oriented 3 times between the take-up roll and the draw roll, and wound on the take-up roll. The obtained polycarbonate stretched and oriented sheet had a thickness of about 0.3 mm.

  As the thermal bonding sheet, a polycarbonate thermal bonding sheet having a thickness of about 0.4 mm and not substantially stretched was used in the same manner as in Example 1.

  In the same manner as in Example 1, the stretched and oriented polycarbonate sheet, the linear polarizer, and the polycarbonate were made so that the stretched direction of the stretched and oriented polycarbonate sheet coincided with the stretched direction (polarized light absorption axis) of the linear polarizer. A heat bonding sheet was attached. The thickness of the obtained polarizing laminate is about 0.8 mm.

Example 4
The polyvinyl alcohol polarizer of Example 1 was used as the linear polarizer. A polycarbonate sheet that was not substantially stretched was prepared as a protective functional part. That is, a polycarbonate resin having a viscosity average molecular weight of 30,000 was applied to an extruder and extruded from a die having a width of 300 mm into a sheet. The roll was wound around the take-up roll while maintaining the speed of the draw roll to such an extent that the gap between the take-up roll and the draw roll was not loosened. The obtained polycarbonate sheet had a thickness of 0.18 mm.

  As a heat-bonding sheet, a polyester resin (Tritan 2001 manufactured by Eastman Kodak Company) was extruded in the same manner as in Example 1 to prepare a polyester sheet that was not substantially stretched. The obtained polyester thermal bonding sheet has a thickness of about 0.5 mm.

  In the same manner as in Example 1, an extruded polycarbonate sheet having a thickness of 0.18 mm, a linear polarizer, and a polyester heat bonding sheet were pasted to prepare a polarizing laminate having a thickness of about 0.6 mm.

Comparative Example 1
The polyvinyl alcohol polarizer of Example 1 was used as the linear polarizer. As a protective function part, a polycarbonate sheet subjected to a stretch orientation treatment was prepared. That is, a polycarbonate resin having a viscosity average molecular weight of 30,000 was applied to an extruder and extruded from a die having a width of 300 mm into a sheet. The film was stretched and oriented 3 times between the take-up roll and the draw roll, and wound on the take-up roll. The obtained polycarbonate stretched and oriented sheet had a thickness of about 0.3 mm.

  As a heat bonding sheet, a polycarbonate resin having a viscosity average molecular weight of 30,000 was applied to an extruder and extruded from a die having a width of 300 mm into a sheet shape. The film was stretched and oriented 3 times between the take-up roll and the draw roll, and wound on the take-up roll. The obtained stretched polycarbonate thermal adhesive sheet had a thickness of about 0.4 mm.

  The stretched and oriented polycarbonate sheet was aligned with the stretched direction of the linear polarizer (polarized light absorption axis) and the stretched polycarbonate thermal adhesive sheet in the same direction as in Example 1. A sheet, a linear polarizer, and a stretched polycarbonate heat bonding sheet were pasted to prepare a polarizing laminate having a thickness of about 0.8 mm.

Comparative Example 2
The polyvinyl alcohol polarizer of Example 1 was used as the linear polarizer. As a protective function part, a polycarbonate sheet substantially not subjected to stretching and orientation treatment was prepared. That is, a polycarbonate resin having a viscosity average molecular weight of 30,000 was applied to an extruder and extruded from a die having a width of 300 mm into a sheet. The speed of each roll was adjusted to such an extent that the sheet was not loosened between the take-up roll and the drawing roll, and the roll was wound on the take-up roll. The obtained polycarbonate stretched and oriented sheet had a thickness of about 0.3 mm.

  Similarly, a polycarbonate resin having a viscosity average molecular weight of 30000 was applied to an extruder to prepare a thermobonding sheet having a thickness of about 0.4 mm which was not substantially stretched and oriented.

  In the same manner as in Example 1, a polycarbonate sheet that was not substantially stretch-oriented, a linear polarizer, and a polycarbonate heat-bonded sheet that was not substantially stretch-oriented were pasted, and the thickness was about 0.8 mm. A polarizing laminate was prepared.

Example 5
An isopropyl alcohol solution of a crosslinkable urethane acrylate (pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer. Urethane acrylate UA-306H from Kyoeisha Chemical Co., Ltd.) was applied to the surface of the transparent nylon heat-bonded sheet of the polarizing laminate prepared in Example 2. Applied.

  After application, the mixture was placed in a hot air oven to remove isopropyl alcohol to form a crosslinkable urethane acrylate layer. Next, the crosslinkable urethane acrylate layer was irradiated with ultraviolet rays to prepare a thermal bonding coating layer. The thickness of the thermal bonding coating layer is 35 μm.

Example 6
The polarizing laminate prepared in Example 1 was punched into a circle having a diameter of 82 mm. The polarizing laminate punched out in a circular shape was placed in a 70 ° C. hot air dryer for 5 hours for drying treatment.

  Next, the polarizing laminate punched out in a circular shape was set in a suction-type free bending apparatus so that the objective side was a protective function part (cast molding polycarbonate sheet) and the eyepiece side was a thermal bonding functional part (polycarbonate thermal bonding sheet). . The suction-type free bending apparatus is provided with a bending mold having a curvature radius of 65 mm, and the temperature of the bending mold is set to 130 ° C.

  The polarizing laminate is set in a suction-type free bending apparatus and simultaneously sucked under reduced pressure toward the bending mold side. In that state, it is placed in a hot air oven at 135 ° C. and suction is continued under the condition of 0.05 MPa. After about 15 minutes, the vacuum suction was stopped, the temperature was lowered to 100 ° C. or lower, and the polarizing laminate shaped into a spherical lens shape was taken out from the bending mold.

  For a bent polarizing lens whose eyepiece side is a heat-bonded sheet, measure the radius of curvature of the polarizer (absorption axis of polarized light) and the radius of curvature (polarization transmission axis) perpendicular to the direction of extension of the polarizer. The results are shown in Table 1, and there was almost no variation in the radius of curvature of the lens.

Example 7
The polarizing laminate prepared in Example 2 was punched into a circle having a diameter of 82 mm. A polarizing lens was prepared by performing a bending process in the same manner as in Example 6 except that the mold temperature was 115 ° C. and the heat oven temperature was 125 ° C.

  The obtained polarized lens was measured for the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1. As shown in Table 1, the curvature radius of the lens almost varies. There was no.

Example 8
The polarizing laminate prepared in Example 3 was punched into a circle having a diameter of 82 mm. In the same manner as in Example 6, bending processing was performed to prepare a polarizing lens.

  For the obtained polarized polarizing lens, the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer were measured. As shown in Table 1, the variation in the curvature radius of the lens was as follows. There were few.

Example 9
The polarizing laminate prepared in Example 4 was punched into a circle having a diameter of 82 mm. In the same manner as in Example 7, bending processing was performed to prepare a polarizing lens.

  The obtained polarized lens was measured for the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1. As shown in Table 1, the curvature radius of the lens almost varies. There was no.

Comparative Example 3
The polarizing laminate prepared in Comparative Example 1 was punched into a circle having a diameter of 82 mm. In the same manner as in Example 6, bending processing was performed to prepare a polarizing lens.

  With respect to the obtained polarized polarizing lens, the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer were measured, respectively. As shown in Table 1, there was a large variation in the curvature radius of the lens. It was observed.

Comparative Example 4
The polarizing laminate prepared in Comparative Example 2 was punched into a circle having a diameter of 82 mm. In the same manner as in Example 6, bending processing was performed to prepare a polarizing lens.

  With respect to the obtained polarized polarizing lens, the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer were measured, respectively. As shown in Table 1, there was a large variation in the curvature radius of the lens. Was not seen.

Example 10
The polarizing laminate prepared in Example 5 was punched into a circle having a diameter of 82 mm. In the same manner as in Example 7, bending processing was performed to prepare a polarizing lens.

  The obtained polarized lens was measured for the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1. As shown in Table 1, the curvature radius of the lens almost varies. There was no.

Example 11
In order to injection-mold the polarizing plano lens, a mold for 8C (curve) = (curvature radius 65 mm) for insert molding was attached to an injection molding machine. The mold is composed of a concave mold for shaping the convex surface of the polarizing lens and a convex mold for shaping the concave surface of the polarizing lens.

  The protective functional part side of the bent polarizing lens prepared in Example 6 was inserted into the concave mold, and the spherical polarizing lens was fixed to the mold by suctioning through the pores provided in the mold.

  The convex mold is closed, and polycarbonate resin (viscosity average molecular weight 25000, manufactured by Teijin Chemicals, Panlite L-1250Z) is injection-molded on the eyepiece side (thermal bonding sheet side) of the polarized polarizing lens. A polarized plano lens backed up with polycarbonate resin having a thickness of 1.8 mm was prepared.

  When the obtained lens was measured for the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1, there was almost no variation in the curvature radius of the lens. It was.

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Example 12
Transparent nylon ("Grillamide" TR-90, manufactured by EMS) was injection-molded on the heat-bonded side of the bent polarizing lens prepared in Example 7 in the same manner as in Example 11, and had a diameter of 82 mm and a center thickness. A polarizing plano lens backed up with 1.8 mm transparent nylon was prepared.

  The obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, respectively. As shown in Table 1, there was almost no variation in the curvature radius of the lens. It was.

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Example 13
Polarized light backed up by polycarbonate resin having a diameter of 82 mm and a center thickness of 1.8 mm obtained by injection molding of a polycarbonate resin on the heat-bonded side of the bent polarizing lens prepared in Example 8 in the same manner as in Example 11. Plano lenses were prepared.

  The obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, respectively. As shown in Table 1, there was almost no variation in the curvature radius of the lens. It was.

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Example 14
A polyester resin (Tritan 2001 manufactured by Eastman Kodak Co., Ltd.) was injection-molded on the heat-bonded side of the bent polarizing lens prepared in Example 9 in the same manner as in Example 11, and had a diameter of 82 mm and a center thickness of 1.8 mm. A polarized plano lens backed up with a polyester resin was prepared.

  When the obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1, there was little variation in the curvature radius of the lens.

  Further, as shown in Table 1, it was a polarizing plano lens having a relatively high degree of polarization.

Comparative Example 5
Polarized light backed up by polycarbonate resin having a diameter of 82 mm and a center thickness of 1.8 mm obtained by injection molding a polycarbonate resin in the same manner as in Example 11 on the heat-bonded side of the bent polarizing lens prepared in Comparative Example 3. Plano lenses were prepared.

  When the obtained lens was measured for the stretching direction of the polarizer and the radius of curvature in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1, there was a large variation in the curvature radius of the lens. .

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Comparative Example 6
Polarized light backed up by polycarbonate resin having a diameter of 82 mm and a center thickness of 1.8 mm, which was injection molded in the same manner as in Example 11, on the heat-bonded side of the bent polarizing lens prepared in Comparative Example 4. Plano lenses were prepared.

  The obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, respectively. As shown in Table 1, there was almost no variation in the curvature radius of the lens. It was.

  Further, as shown in Table 1, it was a polarizing plano lens having a low degree of polarization.

Example 15
A polycarbonate resin was injection-molded in the same manner as in Example 11 on the heat-bonding coating layer of the polarized polarizing lens prepared in Example 10, and a polarizing semi-solid having a diameter of 82 mm and a center thickness of 10 mm backed up with the polycarbonate resin. A finish lens was prepared.
The backup resin side of the obtained semi-finished lens was polished to prepare a -2.00D polarization correcting lens having a center thickness of 1.2 mm.

  The obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, respectively. As shown in Table 1, there was almost no variation in the curvature radius of the lens. It was.

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Example 16
A polyurethane resin (BASF Corp., Elastollan ET595) was injection-molded on the heat-bonded side of the bent polarizing lens prepared in Example 8 in the same manner as in Example 11, and the diameter was 82 mm and the center thickness was 1.8 mm. A polarized plano lens backed up with a polyurethane resin was prepared.

  When the obtained lens was measured for the stretching direction of the polarizer and the curvature radius in the direction perpendicular to the stretching direction of the polarizer, as shown in Table 1, there was little variation in the curvature radius of the lens.

  Further, as shown in Table 1, it was a polarizing plano lens having a high degree of polarization.

Example 17
About the polarizing lens which carried out the bending process prepared in Examples 6-10, the peripheral part was punched and cut so that it might suit spectacle frame shape for every Example.

  For each embodiment, the left and right lenses are paired and framed in a spectacle frame with the convex surface on the objective side and the concave surface on the eyepiece side.

  The resulting polarized glasses had an excellent degree of polarization, no distortion in the lens, and excellent functions as sunglasses and corrective glasses.

Example 18
About the polarizing lens prepared in Examples 11-16, the peripheral part was grind | polished with the lens cutting machine so that it might suit eyeglass frame shape for every Example.

  For each embodiment, the left and right lenses are paired and framed in a spectacle frame with the convex surface on the objective side and the concave surface on the eyepiece side.

  The resulting polarized glasses had an excellent degree of polarization, no distortion in the lens, and excellent functions as sunglasses and corrective glasses.

偏光度の測定は、「家庭品品質表示法」の「２１サングラス」の「偏光度測定方法」による。

The measurement of the polarization degree is based on the “polarization degree measurement method” of “21 Sunglasses” of “Household Product Quality Labeling Method”.

1 Polycarbonate cast molding sheet 2 Linear polarizer (PVA)
3 Injection molding resin (polycarbonate resin)
4 Adhesive laminate 5 Thermal bonding sheet (polycarbonate non-stretched sheet)
6 Triacetylcellulose cast molding method sheet 7 Injection molding resin (polyamide resin)
8 Thermal bonding sheet (polyamide non-stretched sheet)
9 Polycarbonate stretched sheet 10 Polycarbonate unstretched sheet t = 0.18 mm
11 Injection molding resin (polyester resin)
12 Thermal bonding sheet (polyester non-stretched sheet)
13 Coating layer for thermal bonding 14 Injection molding resin (polyurethane resin)

Claims (11)

  In the polarizing laminate, the linearly polarizing functional part is a linear polarizer, and the protective functional part is disposed on one side of the linearly polarizing functional part, and the thermal bonding functional part is disposed on the other side. The functional part is either a cast-molded sheet, a sheet that has been subjected to a stretch orientation treatment, or an extruded sheet having a thickness of 0.25 mm or less, and the thermal bonding functional part is an extruded molded thermal-bonded sheet A polarizing laminate characterized by the above.   The polarizing laminate according to claim 1, wherein the cast molded sheet is a sheet of any one of polycarbonate resin, polyamide resin, polyester resin, polyacrylic resin, polycycloolefin resin, polyurethane resin, and acylcellulose resin. .   A sheet that has been subjected to stretching orientation treatment is an extruded sheet of polycarbonate resin, polyamide resin, polyester resin, polyacrylic resin, polycycloolefin resin, or polyurethane resin that has been stretched in a range of a stretching ratio of 1.05 to 4.5 times. The polarizing laminate according to claim 1, wherein the polarizing laminate is provided.   The extruded sheet having a thickness of 0.25 mm or less is a sheet of any one of a polycarbonate resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polycycloolefin resin, and a polyurethane resin. Polarized laminate.   The polarizing laminate according to claim 1, wherein the heat-bonded sheet formed by extrusion is a sheet of any one of polycarbonate resin, polyamide resin, polyester resin, polyurethane resin, polyacrylic resin, and polycycloolefin resin.   The polarizing laminate according to claim 1, wherein the thermal bonding function is supplemented by a thermal bonding coating layer provided on the thermal bonding side.   The polarizing laminate according to claim 6, wherein the thermal bonding coating layer is any one of a polyurethane resin, a polythiourethane resin, an epoxy resin, a polyvinyl acetate resin, and a polyacrylic resin.   A polarizing lens, which is a bent product of the polarizing laminate according to any one of claims 1 to 7, wherein the protective function portion is on the convex side and the thermal bonding sheet is on the concave side.   9. The polarizing lens according to claim 8, wherein a back-up resin is injection-molded in the thermal bonding function portion of the polarizing lens.   The polarizing lens according to claim 9, wherein the backup resin is any one of a polycarbonate resin, a polyamide resin, a polyester resin, a polyurethane resin, a polyacrylic resin, and a polycycloolefin resin.   Polarized spectacles characterized in that the polarizing lens according to any one of claims 8 to 10 is framed with the protective sheet side as an objective side and the thermal bonding sheet side as an eyepiece side.

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