JP2019197196A - Optical layer and optical component - Google Patents

Abstract

To provide an optical layer and an optical component that are capable of exhibiting excellent optical characteristics over a long period of time.SOLUTION: A functional layer-attached lens 1 (optical layer) is an optical layer an entire shape of which is of a curved shape and which is used for a glasses lens. The optical layer comprises: a lens layer 4 including a first resin material; and a functional layer 3 that is provided on a curved convex surface side of the lens layer 4 and has optical particles optically acting on incident light and a second resin material. When a thickness at a top of the curved shape of the functional layer 3 is defined as A and a thickness at an edge of the functional layer 3 is defined as B, A/B is 0.985 or more and 1.015 or less. The optical layer includes a melted portion 7 formed such that the first resin material and the second resin material are melted and coupled at a boundary part between the lens layer 4 and the functional layer 3.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an optical layer and an optical component.

  Optical parts such as glasses and sunglasses are optically acting on a lens layer made of a light-transmitting material such as a resin material or a glass material, and light that is laminated on the lens layer and transmitted through the lens layer. An optical functional layer including a filler (see, for example, Patent Document 1).

  In the optical component described in Patent Document 1, the optical functional layer is composed of a half mirror layer in which metal films are laminated in a multilayer on a lens layer. For this reason, when the optical component is viewed from the outside, the optical component looks shining and the design is improved, and the user's eyes are difficult to see from the outside. Moreover, an anti-glare effect can be exhibited and a feeling of eye fatigue can be reduced.

  However, the lens layer often has a curved surface, and it is difficult to stack the optical functional layer with a uniform thickness on the curved surface. For this reason, unevenness may occur in the optical characteristics of the optical functional layer.

Therefore, a configuration in which the optical functional layer is molded and then adhered to the lens layer is conceivable. However, in the configuration in which the optical functional layer is adhered to the curved surface, the optical functional layer may be peeled off.
Thus, it is difficult to exhibit excellent optical characteristics over a long period of time.

WO2014 / 115705

  The objective of this invention is providing the optical layer and optical component which can exhibit the outstanding optical characteristic over a long period of time.

Such an object is achieved by the present inventions (1) to (6) below.
(1) The overall shape is a curved shape, and is an optical layer used for a spectacle lens,
A lens layer containing a first resin material;
A functional layer provided on the curved convex surface side of the lens layer and optically acting on incident light and a second resin material;
When the thickness at the top of the curved shape of the functional layer is A and the thickness at the edge of the functional layer is B, A / B is 0.985 or more and 1.015 or less,
An optical layer having a melted portion in which the first resin material and the second resin material are melted and bonded at a boundary portion between the lens layer and the functional layer.

  (2) The optical layer according to (1), wherein the average thickness of the functional layer is 0.5% to 50% of the average thickness of the lens with a functional layer.

  (3) The optical layer according to (1) or (2), wherein the average thickness of the functional layer is 0.05 mm or more and 2 mm or less.

  (4) The optical layer according to any one of (1) to (3), wherein an average thickness of the lens layer is 1 mm or more and 15 mm or less.

(5) The first resin material and the second resin material mainly include polycarbonate,
The optical layer according to any one of (1) to (4), wherein an average molecular weight of the polycarbonate of the first resin material is lower than an average molecular weight of the polycarbonate of the second resin material.

  (6) An optical component comprising the optical layer according to any one of (1) to (5) above.

  ADVANTAGE OF THE INVENTION According to this invention, the optical layer and optical component which can exhibit the outstanding optical characteristic over a long term can be provided.

It is a perspective view of sunglasses (optical component) provided with the optical layer (1st Embodiment) of this invention. It is a perspective view of a sun visor (optical component) provided with the optical layer (1st Embodiment) of this invention. It is the side view which showed typically the functional layer manufacturing apparatus which manufactures the functional layer shown in FIG. It is sectional drawing which showed typically the optical layer manufacturing apparatus which manufactures the optical layer shown in FIG. It is sectional drawing of the optical layer shown in FIG. It is sectional drawing of an optical component provided with the optical layer (2nd Embodiment) of this invention.

  Hereinafter, the optical layer and the optical component of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

<First Embodiment>
FIG. 1 is a perspective view of sunglasses (optical component) provided with the optical layer (first embodiment) of the present invention. FIG. 2 is a perspective view of a sun visor (optical component) including the optical layer (first embodiment) of the present invention. FIG. 5 is a cross-sectional view of the optical layer shown in FIG.

  1, 2, and 5 (the same applies to FIG. 6), the upper side is also referred to as “upper” or “upper”, and the lower side is also referred to as “lower” or “lower”. In the drawings referred to in the present specification, the dimension in the thickness direction is exaggerated and is greatly different from the actual dimension.

  As shown in FIG. 5, the functional layer-equipped lens 1 (optical layer) has a curved shape as a whole. The lens layer 4 includes the first resin material, and the lens layer 4 has a curved convex surface side. A functional layer 3 that is provided and includes an optical particle that optically acts on incident light and a second resin material, and the thickness at the top of the curved shape of the functional layer 3 is A, When the thickness at the edge of the functional layer 3 is B, A / B is 0.985 or more and 1.015 or less, and the first resin material and the boundary between the lens layer 4 and the functional layer 3 are It has the fusion | melting part 7 which the 2nd resin material fuse | melted and couple | bonded.

  Thereby, the variation in the thickness of the functional layer 3 can be suppressed as much as possible, and the functional layer 3 having the uniform thickness as much as possible is provided. Therefore, the optical particles of the functional layer 3 act on the incident light incident on the functional layer-equipped lens 1 in the same manner at any portion. As a result, it is possible to obtain the functional layer-equipped lens 1 with less variation in optical action and excellent optical characteristics.

  In addition, since the melting portion 7 is provided at the boundary between the lens layer 4 and the functional layer 3, that is, the lens layer 4 and the functional layer 3 are melt-bonded, the lens 1 with a functional layer The bonding strength between 4 and the functional layer 3 is relatively high. Therefore, unintentional peeling between the lens layer 4 and the functional layer 3 can be prevented, and the durability is excellent.

  As described above, the functional layer-equipped lens 1 can exhibit excellent optical characteristics over a long period of time.

  In addition, the curvature radius of the curved surface of the lens 1 with a functional layer shall be about 6.54 cm or more and 200 cm or less.

  Such a lens with a functional layer 1 is used for the sunglasses (optical component 10) shown in FIG. 1 and the sun visor (optical component 10 ') shown in FIG.

  As shown in FIG. 1, the sunglasses (optical component 10) includes a frame 2 that is worn on the user's head, and a functional layer-equipped lens 1 (optical layer) that is fixed to the frame 2. In the present specification, the “lens” includes both a lens having a light collecting function and a lens having no light collecting function.

  As shown in FIG. 1, the frame 2 is attached to the user's head, and includes a rim portion 21, a bridge portion 22, a temple portion 23 that is hung on the user's ear, and a nose pad portion 24. have. Each rim portion 21 has a ring shape, and is a portion to which the functional layer-equipped lens 1 is attached.

  The bridge portion 22 is a portion that connects the rim portions 21. The temple portion 23 has a vine shape and is connected to the edge portion of each rim portion 21. This temple part 23 is a part hung on a user's ear. The nose pad portion 24 is a portion that comes into contact with the user's nose when the sunglasses (the optical component 10) are mounted on the user's head. Thereby, a mounting state can be maintained stably.

  The shape of the frame 2 is not limited to that shown in the drawing as long as it can be worn on the user's head.

  The optical component of the present invention includes the above-described lens 1 with a functional layer (optical layer) of the present invention. Thereby, the function as sunglasses can be exhibited, enjoying the advantage of the lens 1 (optical layer) with a functional layer mentioned above.

  As shown in FIG. 2, the sun visor (optical component 10 ′) includes a ring-shaped mounting portion 5 that is mounted on the user's head, and a flange 6 that is provided in front of the mounting portion 5. Yes. The collar 6 includes the functional layer-equipped lens 1 (optical layer). Thereby, the function as a sun visor can be exhibited, enjoying the advantage of the lens 1 (optical layer) with a functional layer mentioned above.

  Hereinafter, the functional layer-equipped lens 1 will be described in detail. In the following, the case of being laminated on the lens layer 4 (base material) will be representatively described.

  As shown in FIG. 5, the functional layer-equipped lens 1 includes a functional layer 3, a lens layer 4, and a melting portion 7.

<Lens layer>
The lens layer 4 includes the first resin material. The first resin material is not particularly limited, and examples thereof include polycarbonate, polyamide, polyvinyl chloride, polyethylene, polypropylene, and the like. Among these, polycarbonate is preferable.

  The polycarbonate is not particularly limited, and various types can be used. Among them, an aromatic polycarbonate is preferable. The aromatic polycarbonate has an aromatic ring in its main chain, and thereby the strength of the functional layer-equipped lens 1 can be further improved.

  This aromatic polycarbonate is synthesized by, for example, an interfacial polycondensation reaction between bisphenol and phosgene, a transesterification reaction between bisphenol and diphenyl carbonate, and the like.

  Examples of bisphenol include bisphenol A and bisphenol (modified bisphenol) that is the origin of the repeating unit of the polycarbonate represented by the following formula (1).

（式（１）中、Ｘは、炭素数１〜１８のアルキル基、芳香族基または環状脂肪族基であり、ＲａおよびＲｂは、それぞれ独立して、炭素数１〜１２のアルキル基であり、ｍおよびｎは、それぞれ０〜４の整数であり、ｐは、繰り返し単位の数である。）

(In Formula (1), X is a C1-C18 alkyl group, an aromatic group, or a cycloaliphatic group, Ra and Rb are respectively independently a C1-C12 alkyl group. , M and n are each an integer of 0 to 4, and p is the number of repeating units.)

  In addition, as a bisphenol used as the origin of the repeating unit of the polycarbonate shown to the said Formula (1), specifically, 4,4'- (pentane-2,2-diyl) diphenol, 4,4'- ( Pentane-3,3-diyl) diphenol, 4,4 ′-(butane-2,2-diyl) diphenol, 1,1 ′-(cyclohexanediyl) diphenol, 2-cyclohexyl-1,4-bis ( 4-hydroxyphenyl) benzene, 2,3-biscyclohexyl-1,4-bis (4-hydroxyphenyl) benzene, 1,1′-bis (4-hydroxy-3-methylphenyl) cyclohexane, 2,2′- Bis (4-hydroxy-3-methylphenyl) propane and the like can be mentioned, and one or more of these can be used in combination.

  In particular, the polycarbonate is preferably composed mainly of a bisphenol-type polycarbonate having a skeleton derived from bisphenol. By using such a bisphenol-type polycarbonate, the lens layer 4 (lens 1 with a functional layer) exhibits further excellent strength.

  The viscosity average molecular weight Mv of such a polycarbonate is preferably 15000 or more and 28000 or less, and more preferably 18000 or more and 23000 or less.

  Thereby, the intensity | strength of the lens 1 with a functional layer can fully be raised. Further, in the molten state of polycarbonate, the fluidity can be sufficiently increased.

  The polycarbonate preferably has a melt flow rate (MFR) measured in accordance with JIS K7210 of 5 g / 10 min or more and 40 g / 10 min or less, and more preferably 20 g / 10 min or more and 35 g / 10 min or less. . Thereby, the fluidity | liquidity of a polycarbonate can fully be improved in a molten state.

  The polycarbonate content in the lens layer 4 is preferably 87 wt% or more and 99.949 wt% or less, and more preferably 90 wt% or more and 99.87 wt% or less. Thereby, the effect of this invention can be exhibited more reliably.

  The thickness (average thickness) of the lens layer 4 is preferably 1 mm or more and 15 mm or less, and more preferably 1.2 mm or more and 5 mm or less. Thereby, sufficient strength of the lens layer 4 can be ensured.

<Functional layer>
The functional layer 3 is provided on the curved convex surface side of the lens layer 4. The functional layer 3 includes optical particles that act optically on incident light and a second resin material.

  The second resin material is not particularly limited, and examples thereof include polycarbonate, polyamide, polyvinyl chloride, polyethylene, and polypropylene. Among these, polycarbonate is preferable.

  The polycarbonate is not particularly limited, and various types can be used. Among them, an aromatic polycarbonate is preferable. The aromatic polycarbonate has an aromatic ring in its main chain, and thereby the strength of the functional layer-equipped lens 1 can be further improved.

  This aromatic polycarbonate is synthesized by, for example, an interfacial polycondensation reaction between bisphenol and phosgene, a transesterification reaction between bisphenol and diphenyl carbonate, and the like.

  Examples of bisphenol include bisphenol A and bisphenol (modified bisphenol) that is the origin of the repeating unit of the polycarbonate represented by the following formula (1).

（式（１）中、Ｘは、炭素数１〜１８のアルキル基、芳香族基または環状脂肪族基であり、ＲａおよびＲｂは、それぞれ独立して、炭素数１〜１２のアルキル基であり、ｍおよびｎは、それぞれ０〜４の整数であり、ｐは、繰り返し単位の数である。）

(In Formula (1), X is a C1-C18 alkyl group, an aromatic group, or a cycloaliphatic group, Ra and Rb are respectively independently a C1-C12 alkyl group. , M and n are each an integer of 0 to 4, and p is the number of repeating units.)

  In addition, as a bisphenol used as the origin of the repeating unit of the polycarbonate shown to the said Formula (1), specifically, 4,4'- (pentane-2,2-diyl) diphenol, 4,4'- ( Pentane-3,3-diyl) diphenol, 4,4 ′-(butane-2,2-diyl) diphenol, 1,1 ′-(cyclohexanediyl) diphenol, 2-cyclohexyl-1,4-bis ( 4-hydroxyphenyl) benzene, 2,3-biscyclohexyl-1,4-bis (4-hydroxyphenyl) benzene, 1,1′-bis (4-hydroxy-3-methylphenyl) cyclohexane, 2,2′- Bis (4-hydroxy-3-methylphenyl) propane and the like can be mentioned, and one or more of these can be used in combination.

  In particular, the polycarbonate is preferably composed mainly of a bisphenol-type polycarbonate having a skeleton derived from bisphenol. By using such a bisphenol-type polycarbonate, the functional layer 3 (lens 1 with a functional layer) exhibits even more excellent strength.

  The viscosity average molecular weight Mv of such a polycarbonate is preferably 20000 or more and 30000 or less, and more preferably 23000 or more and 28000 or less.

  Further, when the first resin material and the second resin material are each polycarbonate, the average molecular weight of the polycarbonate of the lens layer 4 (first resin material) is the polycarbonate of the functional layer 3 (second resin material). Is preferably higher than the average molecular weight. Thereby, even in a curved state, sufficient strength of the convex surface and adhesion between the functional layer 3 and the lens layer 4 can be achieved. Furthermore, it is possible to prevent the functional layer 3 from being deteriorated by the influence of heat received during molding. Therefore, it is possible to prevent the function of the functional layer 3 from being impaired.

  In this case, the difference in viscosity average molecular weight Mv is preferably 2000 or more and 13000 or less, and more preferably 3000 or more and 8000 or less. Thereby, the said effect can be exhibited more reliably.

  Thereby, the intensity | strength of the lens 1 with a functional layer can fully be raised. Further, in the molten state of polycarbonate, the fluidity can be sufficiently increased.

  The polycarbonate preferably has a melt flow rate (MFR) measured in accordance with JIS K7210 of 3 g / 10 min to 30 g / 10 min, and more preferably 15 g / 10 min to 25 g / 10 min. . Thereby, the fluidity | liquidity of a polycarbonate can fully be improved in a molten state.

  Moreover, when the 1st resin material and the 2nd resin material are each polycarbonate, it is preferable that the melt flow rate of the polycarbonate of the lens layer 4 is large. Thereby, as will be described later, the moldability is excellent.

  In this case, the difference in melt flow rate is preferably 2 g / 10 min or more and 35 g / 10 min or less, and more preferably 5 g / 10 min or more and 25 g / 10 min or less. Thereby, the said effect can be exhibited more reliably.

  The optical particles have a function (optical function) that acts optically on incident light. The optical particle is not particularly limited as long as it has an optical function. For example, a visible light reflecting material that reflects visible light, an ultraviolet shielding material that shields ultraviolet rays, an infrared shielding material that shields infrared rays, and the like. Is mentioned.

Examples of the visible light reflecting material include borosilicates such as calcium borosilicate and aluminum borosilicate, TiO ₂ , SnO ₂ , ZnO, Fe ₂ O ₃ , Fe ₃ O ₄ , SiO ₂ , Al ₂ O ₃ , and ZrO _2. Examples thereof include particles that reflect visible light, such as metal oxides, and those that have been treated to attach metal oxides such as titanium oxide and tin oxide to the surfaces of particles that do not reflect visible light. According to such a visible light reflecting material, when the lens with a functional layer 1 is viewed from the outside, it looks bright and is excellent in design.
Note that the color of the visible light reflecting material may be any color such as colorless, red, blue, and yellow.

  On the other hand, examples of the ultraviolet shielding material include materials that reflect ultraviolet rays, such as aluminum alloys such as single metal aluminum, aluminum oxide, Al—Mg, Al—Mg—Si, and Al—Cu. According to such an ultraviolet reflecting material, it is possible to suppress irradiation of ultraviolet rays to the user's eyes. Therefore, the user's eyes can be protected.

  On the other hand, examples of the infrared shielding material include materials having infrared absorptivity such as metal boride, titanium oxide, zirconium oxide, tin-doped indium oxide (ITO), antimony-doped tin oxide (ATO), and tungsten oxide compounds. Thereby, it can suppress that infrared rays are irradiated to a user's eyes. Therefore, the user's eyes can be protected.

  In addition to the above, a laser color former, a photochromic dye, and the like may be contained.

  The shape of these optical particles is not particularly limited, and may be any shape such as a spherical shape, a needle shape, or a scale shape.

  The average particle diameter of the optical particles is preferably 2 nm or more and 2000 nm or less, and more preferably 5 nm or more and 1000 nm or less. As a result, the above-described optical characteristics can be sufficiently improved, and an excessive amount of filling can be prevented.

  The content of such optical particles in the functional layer 3 is preferably 0.0001 wt% or more and 1 wt% or less, and more preferably 0.0002 wt% or more and 0.5 wt% or less. Thereby, while preventing the thickness of the functional layer 3 from becoming too thick, the adhesiveness of the functional layer 3 and the lens layer 4 can be improved. If the content of the optical particles is too small, the above-described effects tend to be insufficient. On the other hand, if the content of the optical particles is too large, haze tends to occur.

  The thickness (average thickness) of the functional layer 3 is preferably 0.05 mm or more and 2.0 mm or less, and more preferably 0.15 mm or more and 1.5 mm or less. Thereby, sufficient strength of the functional layer 3 can be ensured.

  The standard deviation of the average thickness of the functional layer 3 is preferably 0 or more and 0.2 or less, and more preferably 0 or more and 0.1 or less. Thereby, the functional layer 3 has a uniform thickness.

  In such a lens 1 with a functional layer, the melting part 7 is formed in the boundary part. The melting part 7 has a layer shape provided between the functional layer 3 and the lens layer 4. That is, in the functional layer-equipped lens 1, the functional layer 3 and the lens layer 4 are melt-bonded. Thereby, compared with the structure which adhere | attaches a functional layer on a lens layer, or the structure which vapor-deposits a metal film on a lens layer, the joint strength of the functional layer 3 and the lens layer 4 can be raised. Therefore, in the lens 1 with a functional layer, the functional layer 3 can exhibit an optical function for a long time.

The average thickness of the melted part 7 is preferably 1 μm or more and 100 μm or less, and more preferably 2 μm or more and 80 μm or less. Thereby, the bonding strength between the functional layer 3 and the lens layer 4 can be sufficiently ensured.
The thickness of the functional layer 3 and the lens layer 4 is the thickness excluding the melting part 7.

  In such a functional layer-equipped lens 1, A / B is 0.985, where A is the thickness at the top of the curved shape of the functional layer 3 and B is the thickness at the edge of the functional layer 3. It is set to 1.015 or less. Thereby, the variation in the thickness of the functional layer 3 can be suppressed as much as possible, and the functional layer 3 having the uniform thickness as much as possible is provided. Therefore, the optical particles of the functional layer 3 act on the incident light incident on the functional layer-equipped lens 1 in the same manner at any portion. As a result, it is possible to obtain the functional layer-equipped lens 1 with less variation in optical action and excellent optical characteristics.

  When A / B is too large, the thickness at the top of the curved shape of the functional layer 3 becomes too thick, and the optical characteristics are uneven. On the other hand, if A / B is too small, the thickness at the edge of the curved shape of the functional layer 3 becomes too thick, resulting in uneven optical characteristics.

  Further, A / B is more preferably 0.99 or more and 1.01 or less, and further preferably 0.995 or more and 1.005 or less. Thereby, the effect of this invention is acquired more notably.

  Further, as described above, in the lens 1 with a functional layer, the melting part 7 is formed at the boundary part. That is, in the functional layer-equipped lens 1, the functional layer 3 and the lens layer 4 are melt-bonded. As a result, the functional layer-equipped lens 1 has a relatively high bonding strength between the lens layer 4 and the functional layer 3. Therefore, unintentional peeling between the lens layer 4 and the functional layer 3 can be prevented, and the durability is excellent.

  As described above, the functional layer-equipped lens 1 can exhibit excellent optical characteristics over a long period of time.

  The overall average thickness of the functional layer-equipped lens 1 is preferably 1.5 mm or more and 15 mm or less, and more preferably 1.8 mm or more and 12 mm or less. Thereby, sufficient intensity | strength as the lens 1 with a functional layer whole can be ensured.

  Further, the average thickness of the functional layer 3 is preferably 0.5% or more and 50% or less, more preferably 1% or more and 40% or less of the average thickness of the lens 1 with a functional layer. Thereby, the effect of this invention can be exhibited more reliably. If the average thickness of the functional layer 3 is too thin relative to the average thickness of the lens 1 with a functional layer, as will be described later, when the molten lens material is poured, the functional layer 3 is wrinkled and the appearance is deteriorated. There is a possibility. On the other hand, if the average thickness of the functional layer 3 is too thick with respect to the average thickness of the lens 1 with a functional layer, the strain of the functional layer 3 tends to increase and deformation or distortion may occur as a whole.

(Functional layer manufacturing method)
First, the functional layer manufacturing apparatus used for this manufacturing method is demonstrated.

FIG. 3 is a side view schematically showing a functional layer manufacturing apparatus for manufacturing the functional layer shown in FIG. FIG. 4 is a cross-sectional view schematically showing an optical layer manufacturing apparatus for manufacturing the optical layer shown in FIG.
In the following description, the upper side in FIGS. 3 and 4 is referred to as “upper” and the lower side is referred to as “lower”.

  A functional layer manufacturing apparatus 100 illustrated in FIG. 3 includes a sheet supply unit 200 and a sheet forming unit 300.

  In this embodiment, the sheet supply unit 200 includes an extruder 210 and a T die 220 connected to the molten resin discharge unit of the extruder 210 via a pipe. The T-die 220 supplies the sheet-shaped portion 300 with a belt-shaped functional layer 3 ′ (functional sheet) in a molten or softened state.

  The T die 220 is an extrusion molding unit that extrudes the functional layer 3 ′ in a molten state or a softened state in a state of a belt-like sheet by an extrusion method. The T die 220 is loaded with the constituent materials constituting the functional layer-equipped lens 1 described above in a molten state. By extruding the molten material from the T die 220, a functional layer 3 ′ having a belt shape is continuously formed. Sent out.

  The sheet forming unit 300 includes a touch roll 310, a cooling roll 320, and a rear-stage cooling roll 330. These rolls are configured to rotate independently by respective motors (driving means) (not shown), and are continuously sent out by being cooled by the rotation of these rolls. By continuously feeding the functional layer 3 ′ into the sheet forming unit 300, the surface of the functional layer 3 ′ is flattened, and the functional layer 3 ′ is set to a desired thickness and cooled. The functional layer 3 ′ is obtained by cutting the cooled functional layer 3 ′ into a predetermined length.

  The functional layer of this embodiment is manufactured by the functional layer manufacturing method using the functional layer manufacturing apparatus 100 as described above.

The production of the functional layer includes an extrusion process, a molding process, and a cooling process.
First, the melted or softened functional layer 3 ′ having a belt shape is extruded (extrusion process). In this extrusion process, the constituent material (second resin material, optical particles, etc.) of the functional layer-equipped lens 1 is loaded into the extruder 210. The constituent material of the functional layer-equipped lens 1 is in a melted or softened state in the extruder 210. Here, as described above, when the second resin material is a polycarbonate having a viscosity average molecular weight Mv of 20000 or more and 30000 or less, the polycarbonate and the optical particles are sufficiently mixed. And by extruding these in this fully mixed state, in the functional layer 3 obtained through the molding step and the cooling step described later, the optical particles are uniformly dispersed.

  Next, the surface of the functional layer 3 ′ is flattened and the functional layer 3 ′ is set to a predetermined thickness (molding process). This step is performed between the touch roll 310 and the cooling roll 320.

  Next, the surface of the functional layer 3 ′ is cooled (cooling step). This step is performed between the cooling roll 320 and the subsequent cooling roll 330.

  The functional layer-equipped lens 1 can be obtained through the above steps. Next, the manufacturing method of an optical layer is demonstrated.

(Method for producing optical layer)
First, the optical layer manufacturing apparatus used for this manufacturing method is demonstrated.

  An optical layer manufacturing apparatus 400 shown in FIG. 4 includes a resin supply unit 500 and a mold 600. The resin supply unit 500 is filled with the first resin material. The mold 600 includes a cavity 610 and a supply port 620 that communicates the inside and outside of the cavity 610. The mold 600 includes an upper member 630 and a lower member 640. In the assembled state in which these are assembled, the mold 600 that defines the optical layer manufacturing apparatus 400 is configured.

  The optical layer of the present embodiment is manufactured by the optical layer manufacturing method using the optical layer manufacturing apparatus 400 as described above.

The manufacturing method of an optical layer has a functional layer arrangement | positioning process and a lens material supply process.
First, in a state where the upper member 630 and the lower member 640 are disassembled, the functional layer 3 is disposed on the bottom surface 641 of the lower member 640 (functional layer disposing step). The bottom surface 641 is a curved concave surface, whereby a curved surface can be formed. The radius of curvature of the bottom surface 641 is preferably 6.54 cm or more and 200 cm or less.

  Moreover, since the functional layer 3 has flexibility, it is arranged following the curved shape of the bottom surface 641.

  Next, the upper member 630 and the lower member 640 are set in an assembled state, and the molten or softened lens material is poured through the supply port 620 (lens material supply step). At this time, as described above, when the melting point of the polycarbonate (first resin material) of the lens layer 4 is lower than the melting point of the polycarbonate (second resin material) of the functional layer 3, the functional layer 3 is heated by heat. It can suppress that it deform | transforms excessively. Therefore, the thickness of the functional layer 3 can be made as uniform as possible.

  And the laminated body by which the functional layer 3 and the lens layer 4 were laminated | stacked can be obtained by cooling the lens material of the state fuse | melted or softened.

Second Embodiment
FIG. 6 is a cross-sectional view of an optical component including the optical layer (second embodiment) of the present invention.

Hereinafter, the optical layer and the optical component according to the second embodiment of the present invention will be described with reference to the drawings. However, the difference from the above-described embodiment will be mainly described, and the description of the same matters will be omitted. .
This embodiment is the same as the first embodiment except that a polarizing film is provided.

(Functional layer attached lens 1A (polarizing plate))
As shown in FIG. 6, the functional layer-equipped lens 1 </ b> A further includes an adhesive layer 11, a polarizing film 12, an adhesive layer 13, and a polarizing film protective sheet 14 laminated on the functional layer 3. The polarizing film 12 is laminated on the functional layer 3 via the adhesive layer 11. A polarizing film protective sheet 14 is laminated on the surface of the polarizing film 12 opposite to the adhesive layer 11 with an adhesive layer 13 interposed therebetween.

  The polarizing film 12 has a function of extracting linearly polarized light having a polarization plane in a predetermined direction from incident light (natural light that is not polarized). As a result, the incident light that enters the eye through the functional layer-equipped lens 1A is polarized.

  Although the polarization degree of the polarizing film 12 is not specifically limited, For example, it is preferable that they are 50% or more and 100% or less, and it is more preferable that they are 80% or more and 100% or less. Further, the visible light transmittance of the polarizing film 12 is not particularly limited, but is preferably 10% or more and 80% or less, and more preferably 20% or more and 50% or less.

  The constituent material of the polarizing film 12 is not particularly limited as long as it has the above-mentioned function. For example, polyvinyl alcohol (PVA), partially formalized polyvinyl alcohol, polyethylene vinyl alcohol, polyvinyl butyral, polycarbonate, ethylene- A dichroic substance such as iodine or a dichroic dye is adsorbed and dyed on a polymer film composed of a vinyl acetate copolymer partially saponified product, uniaxially stretched, dehydrated polyvinyl alcohol or poly Examples thereof include polyene-based oriented films such as a dehydrochlorinated product of vinyl chloride.

  Among these, the polarizing film 12 is preferably one in which iodine or a dichroic dye is adsorbed and dyed on a polymer film containing polyvinyl alcohol (PVA) as a main material and uniaxially stretched. Polyvinyl alcohol (PVA) is a material excellent in transparency, heat resistance, affinity with iodine or dichroic dye as a dyeing agent, and orientation during stretching. Therefore, the polarizing film 12 containing PVA as a main material is excellent in heat resistance and excellent in polarization function.

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

  The thickness of the polarizing film 12 is not particularly limited, and is preferably, for example, from 5 μm to 60 μm, and more preferably from 10 μm to 40 μm.

  The adhesive (or adhesive) constituting the adhesive layer 11 and the adhesive layer 13 is not particularly limited, and examples thereof include acrylic adhesives, urethane adhesives, epoxy adhesives, and silicone adhesives. Can be mentioned.

  Of these, urethane adhesives are preferred. Thereby, the followability with respect to a shape change can be made particularly excellent while making the transparency, adhesive strength, and durability of the adhesive layer 13 more excellent.

  The polarizing film protection sheet 14 is a layer that protects the polarizing film 12, and is made of, for example, a hard resin such as polycarbonate.

  According to this embodiment as well, the same effects as those of the first embodiment can be obtained, and further, a polarization function can be obtained.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention. It is.

  For example, each component constituting the optical layer of the present invention can be replaced with any component that can exhibit the same function.

  Further, the optical layer of the present invention may be added with an arbitrary component in addition to the above-described configuration.

  More specifically, for example, the optical layer of the present invention may include a protective layer for protecting the surface, an intermediate layer, a power adjusting layer for adjusting the power as a lens, and the like.

Hereinafter, based on an Example, this invention is demonstrated more concretely.
1. 1. Examination of optical layer 1-1. Preparation of optical layer [Example 1]
[1] First, 100 parts by mass of bisphenol A type polycarbonate (manufactured by Mitsubishi Gas Chemical Company, “Iupilon E2000F E5111”) and optical particles (manufactured by Nippon Sheet Glass Co., Ltd., product number: Metashine MC1020RSJA1) are mixed. A functional layer forming material was prepared.

  [2] Next, the functional layer forming material was stored in an extruder 210 of the functional layer manufacturing apparatus 100 shown in FIG. 3 and melted, and extruded from a T-die 220 to obtain a functional layer. And this functional layer was cooled and shape | molded with the sheet | seat shaping | molding part 300, average thickness 0.7mm, and it cut out in the rectangular shape of 500 mm x 500 mm by planar view, and created the functional layer.

  [3] Next, a functional layer was disposed on the bottom surface 641 of the lower member 640 of the optical layer manufacturing apparatus 400 shown in FIG. At this time, the entire surface of one surface of the functional layer was in close contact with the bottom surface 641.

  [4] Next, 100 parts by mass of bisphenol A type polycarbonate (manufactured by Mitsubishi Gas Chemical Company, “S3000”) is stored and melted in the resin supply unit 500 as the first resin material. The material was supplied into the cavity 610 through the supply port 620, and then the inside of the cavity 610 was cooled to obtain an optical layer.

  In the obtained functional layer, A / B is 1.010, where A is the thickness at the central portion (the top when bent) and B is the thickness at the edge of the functional layer. Met. Moreover, the viscosity average molecular weight Mv of the polycarbonate of the functional layer was 26000, the melting point was 250 ° C., and the melt flow rate measured in accordance with JIS K7210 was 5.3 g / 10 min. Moreover, content of the optical particle in a functional layer was 0.2 wt%.

  Moreover, the viscosity average molecular weight Mv of the polycarbonate of a lens layer was 21000, melting | fusing point was 250 degreeC, and the melt flow rate measured based on JISK7210 was 15 g / 10min.

[Examples 2 and 3]
Optical layers of Examples 2 and 3 were obtained in the same manner as in Example 1 except that the configuration of the optical layer was changed as shown in Table 1.

[Comparative Example 1]
An optical layer of Comparative Example 1 was obtained in the same manner as in Example 1 except that A / B was 0.98.

[Comparative Example 2]
An optical layer of Comparative Example 2 was obtained in the same manner as in Example 1 except that A / B was 1.02.

[Comparative Example 3]
First, a functional layer was obtained in the same manner as in Example 1. Next, a lens layer made of the same material as in Example 1 and having an average thickness of 1.3 mm and a curvature curvature of 8 cm was molded. And the functional layer and the lens layer were joined using the adhesive agent ("trade name LA-2355" by Mitsui Chemicals), and the optical layer of the comparative example 3 was obtained.

  In Table 1, A1 represents bisphenol A type polycarbonate (manufactured by Mitsubishi Gas Chemical Company, “Iupilon E2000F E5111”), and A2 represents bisphenol A type polycarbonate (manufactured by Mitsubishi Gas Chemical Company, “S3000”). ing. In Table 1, B1 indicates (manufactured by Nippon Sheet Glass Co., Ltd., product number: Metashine MC1020RSJA1).

1-2. Evaluation The optical layers of each Example and each Comparative Example were evaluated by the following methods.

(Optical property evaluation (thickness uniformity evaluation))
The optical center of the lens and five points on the top, bottom, left, and right were measured with a HAZE meter, and a value obtained by subtracting the minimum value from the maximum value of haze was calculated and evaluated as follows.

A: 0 or more and less than 0.05.
B: 0.05 or more and less than 0.2.
C: 0.2 or more and less than 0.5.
D: 0.5 or more.

(Durability evaluation)
The edge of the optical layer was gripped with pliers, the lens was broken, and it was observed whether or not the functional layer and the lens layer were peeled in the cross section. And it evaluated as follows.

A: No peeling B: Small peeling C: Partial peeling
D: The whole peels

  The evaluation results in the optical layers of the examples and comparative examples obtained as described above are shown in Table 1 below.

  As shown in Table 1, the optical layer in each example exhibited optical characteristics superior to those of each comparative example, and was satisfactory for each comparative example.

DESCRIPTION OF SYMBOLS 10 Optical component 10 'Optical component 1 Lens 1A with a functional layer Lens 2 with a functional layer Frame 21 Rim part 22 Bridge part 23 Temple part 24 Nose pad part 3 Functional layer 3' Functional layer 4 Lens layer 5 Mounting part 6 Head 7 Melting part DESCRIPTION OF SYMBOLS 11 Adhesive layer 12 Polarizing film 13 Adhesive layer 14 Polarizing film protective sheet 100 Functional layer manufacturing apparatus 200 Sheet supply part 210 Extruder 220 T die 300 Sheet forming part 310 Touch roll 320 Cooling roll 330 Subsequent cooling roll 400 Optical layer production Device 500 Resin supply unit 600 Mold 610 Cavity 620 Supply port 630 Upper member 640 Lower member 641 Bottom surface

Such an object is achieved by the present inventions (1) to ( 9 ) below.
(1) The overall shape is a curved shape, and is an optical layer used for a spectacle lens,
A lens layer containing a first resin material;
A functional layer provided on the curved convex surface side of the lens layer and optically acting on incident light and a second resin material;
When the thickness at the top of the curved shape of the functional layer is A and the thickness at the edge of the functional layer is B, A / B is 0.985 or more and 1.015 or less,
A boundary portion between the functional layer and the lens layer, and the first resin material and said second resin material have a melting portion bonded is melted,
The optical layer, wherein an average thickness of the melted part is 1 μm or more and 100 μm or less .

(5) The first resin material and the second resin material mainly include polycarbonate,
5. The optical layer according to any one of (1) to (4), wherein the viscosity average molecular weight Mv of the polycarbonate of the first resin material is lower than the viscosity average molecular weight Mv of the polycarbonate of the second resin material.
(6) The optical system according to (5), wherein the difference between the viscosity average molecular weight Mv of the polycarbonate of the first resin material and the viscosity average molecular weight Mv of the polycarbonate of the second resin material is 2000 or more and 13000 or less. Sex layer.
(7) The first resin material and the second resin material mainly include polycarbonate,
The melt flow rate measured according to JIS K7210 of the polycarbonate of the first resin material is larger than the melt flow rate measured according to JIS K7210 of the polycarbonate of the second resin material. The optical layer according to any one of (1) to (6).
(8) The melt flow rate measured according to JIS K7210 of the polycarbonate of the first resin material, and the melt flow rate measured according to JIS K7210 of the polycarbonate of the second resin material. The optical layer according to (7), wherein the difference is 2 g / 10 min to 35 g / 10 min.

( 9 ) An optical component comprising the optical layer according to any one of (1) to ( 8 ) above.

Such an object is achieved by the present inventions (1) to ( 7 ) below.
(1) The overall shape is a curved shape, and is an optical layer used for a spectacle lens,
A lens layer comprising a first resin material comprising primarily polycarbonate ;
Provided the curved convex surface of the lens layer, comprising an optical particle that act optically, mainly a functional layer and a second resin material containing polycarbonate, with respect to the incident light,
When the thickness at the top of the curved shape of the functional layer is A and the thickness at the edge of the functional layer is B, A / B is 0.985 or more and 1.015 or less,
At the boundary between the lens layer and the functional layer, the first resin material and the second resin material are melted and bonded,
The average thickness of the fusion zone state, and are more 100μm or less 1 [mu] m,
The melt flow rate measured according to JIS K7210 of the polycarbonate of the first resin material is larger than the melt flow rate measured according to JIS K7210 of the polycarbonate of the second resin material,
The difference between the melt flow rate measured according to JIS K7210 of the polycarbonate of the first resin material and the melt flow rate measured according to JIS K7210 of the polycarbonate of the second resin material is An optical layer, wherein the optical layer is 2 g / 10 min or more and 35 g / 10 min or less .

(5) The first resin material and the second resin material mainly include polycarbonate,
5. The optical layer according to any one of (1) to (4), wherein the viscosity average molecular weight Mv of the polycarbonate of the first resin material is lower than the viscosity average molecular weight Mv of the polycarbonate of the second resin material.
(6) The optical system according to (5), wherein the difference between the viscosity average molecular weight Mv of the polycarbonate of the first resin material and the viscosity average molecular weight Mv of the polycarbonate of the second resin material is 2000 or more and 13000 or less. Sex layer .

( 7 ) An optical component comprising the optical layer according to any one of (1) to ( 6 ) above.

Claims (6)

The overall shape is a curved shape and is an optical layer used for spectacle lenses,
A lens layer containing a first resin material;
A functional layer provided on the curved convex surface side of the lens layer and optically acting on incident light and a second resin material;
When the thickness at the top of the curved shape of the functional layer is A and the thickness at the edge of the functional layer is B, A / B is 0.985 or more and 1.015 or less,
An optical layer having a melted portion in which the first resin material and the second resin material are melted and bonded at a boundary portion between the lens layer and the functional layer.   2. The optical layer according to claim 1, wherein an average thickness of the functional layer is 0.5% or more and 50% or less of an average thickness of the lens with a functional layer.   The optical layer according to claim 1 or 2, wherein an average thickness of the functional layer is 0.05 mm or more and 2 mm or less.   The optical layer according to any one of claims 1 to 3, wherein an average thickness of the lens layer is 1 mm or more and 15 mm or less. The first resin material and the second resin material mainly include polycarbonate,
5. The optical layer according to claim 1, wherein an average molecular weight of the polycarbonate of the first resin material is lower than an average molecular weight of the polycarbonate of the second resin material.   An optical component comprising the optical layer according to any one of claims 1 to 5.

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