JP2018005228A - Polarizing laminate and spectacles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polarizing laminate which is capable of maintaining stable quality over a prolonged period and offers superior processability, and to provide spectacles having the same.SOLUTION: A polarizing laminate 3 of the present invention comprises; a polarizing film 31; a first layer 32 provided on a side of one surface, a first surface 311, of the polarizing film 31 and made of a material containing a semi-aromatic polyamide; and a second layer 33 provided on a side of a second surface 312, a surface opposite the first surface 311, of the polarizing film and made of a material containing an alicyclic polyamide. The semi-aromatic polyamide contains an aromatic dicarboxylic acid and aliphatic diamine as constituting monomers.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a polarizing laminate and spectacles.

  Sunglasses (including sunglasses with prescriptions), goggles, sun visors, and the like are used for the purpose of anti-glare, eye protection from wind and rain, dust, chemicals, and the like. In addition, sunglasses without a frame are also used from the viewpoint of fashionability and lightness.

  Conventionally, in such sunglasses as described above, a polarizing laminate (lens) having a structure in which both surfaces of a polarizing film are covered with a layer made of a glass material or a plastic material has been used (for example, see Patent Document 1). .

  As the plastic material constituting such a polarizing laminate, polycarbonate or the like has been used. For the purpose of improving impact resistance, chemical resistance, stress resistance, dyeability, etc., alicyclic There is also a polarizing laminate using the formula polyamide.

  However, such a polarizing laminate has a problem that it is inferior in fixing force by being fitted into a frame or the like or screwed, and is liable to be cracked or cracked during processing such as drilling.

JP 2011-128331 A

  An object of the present invention is to provide a polarizing laminate that can maintain stable quality for a long period of time and is excellent in workability, and to provide glasses equipped with the polarizing laminate.

Such an object is achieved by the present inventions (1) to (8) below.
(1) a polarizing film;
A first layer provided on a first surface side which is one surface of the polarizing film and made of a material containing a semi-aromatic polyamide;
A polarizing laminate, comprising: a second layer that is provided on a second surface side opposite to the first surface and is made of a material containing an alicyclic polyamide.

  (2) The polarizing laminate according to (1), wherein the semi-aromatic polyamide includes an aromatic dicarboxylic acid and an aliphatic diamine as constituent monomers.

  (3) The polarizing laminate according to (1) or (2), wherein the retardation of the first layer is 2500 or more.

  (4) The polarizing laminate according to any one of (1) to (3), wherein a glass transition point of the semi-aromatic polyamide is lower than a glass transition point of the alicyclic polyamide.

  (5) The polarizing laminate according to any one of (1) to (4), wherein the polarizing laminate is a spectacle lens.

  (6) The polarizing layered product according to any one of (1) to (5), wherein the surface on which the second layer is provided is used with the surface facing the user's eyes. Polarizing laminate.

  (7) The polarizing laminate according to any one of (1) to (6), wherein the polarizing laminate has a curved plate shape, and the first layer is provided on the convex surface side.

  (8) Glasses comprising the polarizing laminate according to any one of (1) to (7).

  According to the present invention, it is possible to provide a polarizing laminate that can maintain stable quality for a long period of time and is excellent in workability, and it is possible to provide glasses equipped with the polarizing laminate.

It is a perspective view which shows the sunglasses as an example of the spectacles of this invention provided with the polarizing laminated body of this invention. It is an expanded sectional view of the polarizing layered product of the present invention.

  Hereinafter, the polarizing laminate and glasses of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

  FIG. 1 is a perspective view showing sunglasses as an example of eyeglasses of the present invention provided with the polarizing laminate of the present invention, and FIG. 2 is an enlarged sectional view of the polarizing laminate of the present invention.

  1 and 2, the upper side is referred to as “upper” or “upper”, and the lower side is also referred to as “lower” or “lower”. In the drawings referred to in this specification, a part of the drawings is exaggerated and is greatly different from actual dimensions.

  As shown in FIG. 1, the sunglasses (glasses) 1 includes a frame 2 attached to the user's head, and a polarizing laminate (lens) 3 fixed to the frame 2. In the present specification, the “lens” includes both those with a degree (for example, for myopia, for farsightedness, for astigmatism) and those without a degree.

  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 on which the polarizing laminate (lens) 3 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 1 are mounted on the user's head. Thereby, a mounting state can be maintained stably.

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

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

Each rim portion 21 is provided with a polarizing laminate (lens) 3.
As described later in detail, the polarizing laminate (lens) 3 can maintain stable quality for a long period of time and has excellent workability. Therefore, the sunglasses (with the polarizing laminate (lens) 3) ( The glasses 1 can also maintain stable quality for a long time.

  As shown in FIG. 2, the polarizing laminate (lens) 3 is composed of a polarizing film 31 and a material including a semi-aromatic polyamide which is disposed on the first surface 311 side which is one surface of the polarizing film 31. The first layer (first polyamide layer) 32 and the second surface 312 side opposite to the first surface 311 of the polarizing film 31 are made of a material containing alicyclic polyamide. A configured second layer (second polyamide layer) 33, and an adhesive layer (first adhesive layer) 34 disposed between the polarizing film 31 and the first layer 32 to bond (adhere) them. And an adhesive layer (second adhesive layer) 35 disposed between the polarizing film 31 and the second layer 33 to bond (adhere) them.

  As described above, one surface side of the polarizing film 31 is covered with the first layer 32 made of a material containing semi-aromatic polyamide, and the other surface side of the polarizing film 31 is made of a material containing alicyclic polyamide. By covering with the configured second layer 33, the polarizing laminate 3 is suitably protected by the polarizing film 31, and can maintain excellent polarization characteristics over a long period of time. In addition, since semi-aromatic polyamide is a material having a higher elastic modulus than alicyclic polyamide or the like, by providing the first layer 32 made of a material containing semi-aromatic polyamide, stress such as bending can be obtained. It is possible to have excellent resistance to the above, and it is possible to improve the fixing force when the polarizing laminate 3 is fitted into the frame 2 and the fixing force when screwed. Cracks, cracks, and the like are less likely to occur during processing, and the workability of the polarizing laminate 3 is excellent. Moreover, the material containing a semi-aromatic polyamide can easily control retardation by stretching, and the polarizing property of the polarizing laminate 3 as a whole can be further improved.

  On the other hand, when it does not have the above configuration, the above excellent effect cannot be obtained.

  For example, when at least one surface of the polarizing film is not coated, the polarizing film is easily scratched, and excellent polarizing characteristics cannot be stably exhibited over a long period of time.

  In addition, when both surfaces of the polarizing film are covered with a layer composed of alicyclic polyamide, the polarizing film is inferior in fixing force by fitting into a frame or the like or screwing. In addition, the alicyclic polyamide generally has a higher glass transition temperature (Tg) than the semi-aromatic polyamide, and when trying to form a layer by stretching, the heat load increases, and the productivity of the polarizing laminate is increased. In addition to being disadvantageous in terms of production cost, the constituent materials are likely to deteriorate, and the stability of the polarizing laminate is likely to deteriorate.

  In the present specification, the semi-aromatic polyamide means a polyamide in which one of a dicarboxylic acid and a diamine as monomers constituting the polyamide is an aromatic compound and the other is an aliphatic compound.

  In other words, the semi-aromatic polyamide can be represented by the following formula (1).

（ただし、式（１）中のＲ^１およびＲ^２は、一方が２価の芳香族置換基、他方が２価の脂肪族置換基であり、ｎは、２以上の整数である。）

(In the formula (1), one of R ¹ and R ² is a divalent aromatic substituent, the other is a divalent aliphatic substituent, and n is an integer of 2 or more.)

  The polyamide may be a copolymer (random copolymer, block copolymer, etc.) containing two or more monomers for at least one of dicarboxylic acid and diamine.

  The polarizing laminate 3 may be applied to, for example, goggles, sun visors, etc., but is preferably a spectacle lens applied to the spectacles as described above.

  In general, eyeglass lenses are used by being attached to the human body while being loaded into the frame and screwed, etc., and are used by attaching to the human body. In the present invention, even when the polarizing laminate is applied to a spectacle lens, it is possible to effectively prevent problems such as cracks and breakage during processing, Even during use, the occurrence of the above problems can be effectively prevented. Therefore, when the polarizing laminate is applied to a spectacle lens, the effect of the present invention is more remarkably exhibited.

  In use, the polarizing laminate 3 may face either the first layer 32 or the second layer 33, but the surface on which the second layer 33 is provided is on the user's eye side. It is preferably used in a state suitable for the above.

(Polarizing film)
The polarizing film 31 has a function of extracting linearly polarized light having a polarization plane in a predetermined direction from incident light (unpolarized natural light). Thereby, the incident light that enters the eye through the polarizing laminate (lens) 3 is polarized.

  Although the polarization degree of the polarizing film 31 is not specifically limited, For example, it is preferable that it is 50% or more and 100% or less, and it is more preferable that it is 80% or more and 100% or less. Further, the visible light transmittance of the polarizing film 31 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 31 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 31 is preferably a film obtained by adsorbing or dyeing iodine or a dichroic dye on a polymer film containing polyvinyl alcohol (PVA) as a main material and uniaxially stretching. 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 31 mainly made of PVA has excellent heat resistance and excellent polarizing ability.

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

  The thickness of the polarizing film 31 is not particularly limited, and is preferably, for example, 5 μm or more and 60 μm or less, and more preferably 10 μm or more and 40 μm or less.

(First layer)
The first layer 32 is made of a material containing semi-aromatic polyamide.

  As described above, the semi-aromatic polyamide may be a polyamide in which one of dicarboxylic acid and diamine as a monomer constituting the polyamide is an aromatic compound and the other is an aliphatic compound. Although it can be shown by 1), it is preferable that the following conditions are satisfied.

The aromatic substituent of R ¹ and R ^{2 in} the above formula (1) is preferably the one represented by the following formula (2).

（ただし、式（２）中、ｌ、ｍは、それぞれ独立に０以上２以下の整数である。）

(However, in formula (2), l and m are each independently an integer of 0 or more and 2 or less.)

  Thereby, while being able to protect the polarizing film 31 more suitably, the workability of the polarizing laminated body 3 can be made more excellent. Moreover, the retardation by stretching can be controlled more easily.

The aliphatic substituent of R ¹ and R ^{2 in} the above formula (1) preferably has 4 to 18 carbon atoms, and is a hydrocarbon group having 4 to 18 carbon atoms. Is more preferable, and a saturated hydrocarbon group having 4 to 18 carbon atoms is more preferable.
Thereby, the workability of the polarizing laminate 3 can be further improved.

  The semi-aromatic polyamide preferably contains an aromatic dicarboxylic acid and an aliphatic diamine as constituent monomers.

  Thereby, while being able to protect the polarizing film 31 more suitably, the workability of the polarizing laminated body 3 can be made more excellent. Moreover, the retardation by stretching can be controlled more easily.

  The semi-aromatic polyamide may contain an aliphatic dicarboxylic acid and an aromatic diamine as constituent monomers.

  Specific examples of the semi-aromatic polyamide contained in the first layer 32 include those represented by the following formula (3) to the following formula (6).

（ただし、式（３）中、ｎは、２以上の整数である。）

(In the formula (3), n is an integer of 2 or more.)

（ただし、式（４）中、ｎは、２以上の整数である。）

(However, in formula (4), n is an integer of 2 or more.)

（ただし、式（５）中、ｎは、２以上の整数である。）

(However, in formula (5), n is an integer of 2 or more.)

（ただし、式（６）中、ｎは、２以上の整数であり、Ｃ_６Ｈ_９は、直鎖状態の炭化水素基を示す。）

(Wherein (in 6), n is an integer of 2 or _more, C 6 _{H 9} denotes a hydrocarbon group of a linear state.)

  Thereby, while being able to protect the polarizing film 31 more suitably, the workability of the polarizing laminated body 3 can be made more excellent. Moreover, the retardation by stretching can be controlled more easily.

  As the semi-aromatic polyamide, for example, a copolymer (block copolymer) represented by the following formula (7) can be used.

（ただし、式（７）中、ｍ、ｎは、それぞれ独立に、２以上の整数である。）

(In the formula (7), m and n are each independently an integer of 2 or more.)

  Thereby, control of the elasticity modulus of semi-aromatic polyamide, the adhesiveness with respect to the polarizing film 31 of the 1st layer 32, etc. can be performed more suitably.

  The glass transition point of the semi-aromatic polyamide contained in the first layer 32 is preferably lower than the glass transition point of the alicyclic polyamide contained in the second layer 33.

  Thereby, the stretching for expressing the retardation in the first layer 32 can be more suitably performed. Moreover, the reliability of the polarizing laminate 3 can be further improved.

  The glass transition temperature (Tg) of the semi-aromatic polyamide is preferably 100 ° C. or higher and 150 ° C. or lower, and more preferably 105 ° C. or higher and 140 ° C. or lower.

  Thereby, the stretching for causing the first layer 32 to exhibit retardation can be more suitably performed. Further, the durability and reliability of the polarizing laminate 3 can be further improved.

  The first layer 32 only needs to contain a semi-aromatic polyamide, and may contain other components in addition to the semi-aromatic polyamide. Examples of such components include colorants such as dyes, fillers, alignment aids, stabilizers (thermal stabilizers, ultraviolet absorbers, antioxidants, etc.), plasticizers, colorants, flame retardants, and antistatic agents. Agents, viscosity modifiers, polyamides other than semi-aromatic polyamides, resin materials other than polyamides, and the like.

  Examples of the dye include acid dyes, direct dyes, reactive dyes, and basic dyes, and one or two or more selected from these can be used in combination.

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

Examples of the filler 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 . A metal oxide etc. are mentioned.

The shape of the filler is not particularly limited, and may be any shape such as a spherical shape or a scale shape.
Further, the color of the filler may be colorless or any color such as red, blue, and yellow.

  As the alignment aid, those having a function of improving the degree of orientation of the particles constituting the filler can be used.

  Specific examples of the alignment aid include, for example, alcohols such as methanol, ethanol, propanol, n-butanol and t-butanol, carboxylic acids such as acetic acid, butyric acid and benzoic acid, esters such as ethyl acetate and ethyl lactate, Dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, diisodecyl phthalate, butyl benzyl phthalate, di-2-ethylhexyl adipate, di-n-alkyl adipate 610, azelaic acid di- Examples include 2-ethylhexyl, dibutyl sebacate, di-2-ethylhexyl sebacate, tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, tricresyl phosphate, and tributyl acetylcitrate.

  The content of the semi-aromatic polyamide in the first layer 32 is preferably 60% by mass or more, more preferably 70% by mass or more, and further preferably 80% by mass or more.

  Thereby, the effect by providing the 1st layer 32 containing semi-aromatic polyamide as mentioned above can be exhibited more notably.

  The color of the first layer 32 may be colorless or any color such as red, blue, and yellow.

  The retardation (product of birefringence (Δn) and thickness (d)) of the first layer 32 is preferably 2500 or more, and more preferably 4000 or more.

  As a result, even if the lens shape is bent, iridescent color unevenness is unlikely to occur, and the effect of preventing color loss is obtained.

  The thickness of the first layer 32 is not particularly limited, but is preferably 10 μm or more and 800 μm or less, and more preferably 30 μm or more and 500 μm or less.

  The first layer 32 can be suitably formed, for example, by bonding a film formed by stretching a sheet material made of a material containing a semi-aromatic polyamide to the polarizing film 31.

  Although the heating temperature at the time of extending | stretching of the said sheet | seat material is not specifically limited, It is preferable that it is 100 to 150 degreeC, and it is more preferable that it is 110 to 140 degreeC.

(Second layer)
The second layer 33 is made of a material containing alicyclic polyamide.

  By providing the second layer 33 made of a material containing an alicyclic polyamide together with the first layer 32 made of a material containing a semi-aromatic polyamide, the impact resistance required for the spectacle lens can be secured. The effect is obtained.

  The alicyclic polyamide has an alicyclic chemical structure in the molecule, and may have an alicyclic chemical structure in the main chain structure, or an alicyclic in the side chain structure. It may have a chemical structure of the formula:

Examples of the alicyclic polyamide include those in which at least one of dicarboxylic acid and diamine as a monomer constituting the polyamide is a compound having an alicyclic chemical structure.
Examples of the alicyclic polyamide include those represented by the following formula (8).

（ただし、式（８）中、Ｒ^３、Ｒ^４は、それぞれ独立に、水素原子または炭素数が４以下の炭化水素基、ｏは、２以上１４以下の整数、ｐは、０以上６以下の整数、ｎは、２以上の整数である。）

(In the formula (8), R ³ and R ⁴ are each independently a hydrogen atom or a hydrocarbon group having 4 or less carbon atoms, o is an integer of 2 or more and 14 or less, and p is 0 or more and 6 or less.) And n is an integer of 2 or more.)

  Specific examples of the alicyclic polyamide contained in the second layer 33 include those represented by the following formula (9) and the following formula (10).

（ただし、式（９）中、ｎは、２以上の整数である。）

(In the formula (9), n is an integer of 2 or more.)

（ただし、式（１０）中、ｎは、２以上の整数である。）

(In the formula (10), n is an integer of 2 or more.)

The glass transition temperature (Tg) of the alicyclic polyamide is preferably 140 ° C. or higher and 190 ° C. or lower, and more preferably 150 ° C. or higher and 180 ° C. or lower.
Thereby, the durability of the polarizing laminate 3 can be further improved.

  The glass transition temperature of the alicyclic polyamide contained in the second layer 33 is Tg1 [° C.], the glass transition temperature of the alicyclic polyamide contained in the second layer 33 is Tg2 [° C.], 15 It is preferable to satisfy the relationship of ≦ Tg2−Tg1 ≦ 45, and it is more preferable to satisfy the relationship of 20 ≦ Tg2−Tg1 ≦ 40.

  Thereby, the workability and durability of the polarizing laminate 3 can be compatible at a higher level.

  The second layer 33 only needs to contain an alicyclic polyamide, and may contain other components in addition to the alicyclic polyamide. Examples of such components include colorants such as dyes, fillers, alignment aids, stabilizers (thermal stabilizers, ultraviolet absorbers, antioxidants, etc.), plasticizers, colorants, flame retardants, and antistatic agents. Agents, viscosity modifiers, polyamides other than alicyclic polyamides, resin materials other than polyamides, and the like.

  The content of the alicyclic polyamide in the second layer 33 is preferably 60% by mass or more, more preferably 70% by mass or more, and further preferably 80% by mass or more.

  Thereby, the effect by providing the 2nd layer 33 containing alicyclic polyamide as mentioned above can be exhibited more notably.

  The color of the second layer 33 may be colorless or any color such as red, blue, and yellow.

  The thickness of the second layer 33 is not particularly limited, but is preferably 10 μm or more and 800 μm or less, and more preferably 30 μm or more and 500 μm or less.

  The second layer 33 can be suitably formed, for example, by bonding a sheet material made of a material containing alicyclic polyamide to the polarizing film 31.

(First adhesive layer)
An adhesive layer (first adhesive layer) 34 is provided between the polarizing film 31 and the first layer 32 to join (adhere) them.
Thereby, the durability of the polarizing laminate 3 can be made particularly excellent.

  The adhesive (or pressure-sensitive adhesive) constituting the adhesive layer 34 is not particularly limited, and examples thereof include acrylic adhesives, urethane adhesives, epoxy adhesives, and silicone adhesives.

  Of these, urethane adhesives are preferred. Thereby, while making the transparency, adhesive strength, and durability of the adhesive layer 34 more excellent, it is possible to make the followability to the shape change particularly excellent. It can be made more suitable by various processing.

  In particular, the formation of the adhesive layer 34 uses a two-pack type urethane adhesive and a first treatment for allowing the curing reaction to proceed in a low humidity environment, and the treatment temperature is higher than that of the first treatment. It is preferable to perform the second processing.

  Accordingly, the amount of NCO groups can be suitably adjusted so as to prevent the NCO group from being excessive with respect to the hydroxyl group of the main agent and to be a suitable amount according to the hydroxyl group of the main agent, and the curing reaction ( In the initial stage of the polymerization reaction), the formation of urethane bonds can be suitably advanced, and it is possible to effectively prevent bubbles due to the generation of carbon dioxide from adversely affecting the appearance and function of the polarizing laminate 3, The productivity of the polarizing laminate 3 can be made excellent.

  The humidity during the first treatment is preferably 60% RH or less, and more preferably 55% RH or less.

  Thereby, the side reaction which generate | occur | produces a carbon dioxide can be prevented and suppressed more effectively, and the above effects are exhibited more notably.

Moreover, it is preferable that the temperature at the time of performing a 1st process is 10 degreeC or more and 30 degrees C or less.
Thereby, while being able to prevent and suppress the side reaction which generate | occur | produces a carbon dioxide more effectively, the productivity of the polarizing laminated body 3 can be made more excellent.

  The treatment time of the first treatment is preferably 12 hours or more and 60 hours or less, and more preferably 18 hours or more and 48 hours or less.

  Thereby, productivity of the light-polarizing laminated body 3 can be made more excellent, making the formation reaction of the target urethane bond fully advance.

  The temperature at the time of performing the second treatment is preferably higher than the treatment temperature in the first treatment, and specifically, it is preferably 30 ° C. or more and 50 ° C. or less.

  Thereby, productivity of the polarizing laminated body 3 can be made more excellent, preventing the unintentional quality fall of the polarizing laminated body 3 more reliably.

  The treatment time of the second treatment is preferably 12 hours or more and 60 hours or less, and more preferably 18 hours or more and 48 hours or less.

  Thereby, productivity of the polarizing laminated body 3 can be made more excellent, preventing the unintentional quality fall of the polarizing laminated body 3 more reliably.

Further, the adhesive layer 34 may include components other than the adhesive (or pressure-sensitive adhesive).
Examples of such components include stabilizers (thermal stabilizers, ultraviolet absorbers, antioxidants, etc.), plasticizers, colorants, flame retardants, antistatic agents, viscosity modifiers, and the like.

  The content of the adhesive in the adhesive layer 34 is preferably 50% by mass or more, and more preferably 60% by mass or more.

  Although the thickness of the adhesive layer 34 is not particularly limited, for example, it is preferably 0.1 μm or more and 80 μm or less, more preferably 1 μm or more and 60 μm or less, and further preferably 2 μm or more and 50 μm or less. preferable.

  Thereby, the durability, workability, etc. of the polarizing laminate 3 can be further improved while making the optical properties of the polarizing laminate 3 more excellent.

(Second adhesive layer)
An adhesive layer (second adhesive layer) 35 is provided between the polarizing film 31 and the second layer 33 to join (adhere) them.
Thereby, the durability of the polarizing laminate 3 can be made particularly excellent.

The adhesive layer (second adhesive layer) 35 preferably satisfies the same conditions as the adhesive layer (first adhesive layer) 34 described above.
Thereby, the same effect as described above can be obtained.

  In FIG. 2, a part of the polarizing laminate 3 is illustrated as a flat plate as an enlarged cross-sectional view. However, the entire polarizing laminate 3 is not limited to a flat plate and may have any shape. For example, the polarizing laminate 3 may have a plano-convex lens shape, a plano-concave lens shape, a biconvex lens shape, a biconcave lens shape, an uneven lens shape, or the like.

  When the polarizing laminate 3 has a curved plate shape, the first layer 32 is preferably provided on the convex surface side.

  Thereby, compared with the case where the layer comprised with the material containing semi-aromatic polyamide is provided in the concave surface of the polarizing laminated body, it is easy to maintain a high retardation.

Further, the thickness of the polarizing laminate 3 (the thickness of the portion of the polarizing laminate 3 where the light incident on the user's eyes is incident in the usage state of the polarizing laminate 3) is not particularly limited. However, it is preferably 0.5 mm or more and 5.0 mm or less, and more preferably 1.0 mm or more and 3.0 mm or less.
Thereby, relatively high strength and weight reduction can be achieved at a higher level.

  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 part which comprises the polarizing laminated body of this invention and spectacles can be substituted with the thing of the arbitrary structures which can exhibit the same function.

  Moreover, in addition to the structure mentioned above, arbitrary structures may be added to the polarizing laminate and glasses of the present invention.

  More specifically, for example, the polarizing laminate 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.

  The constituent material of the protective layer is not particularly limited. For example, polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN), polyolefin resins such as polyethylene and polypropylene, Examples thereof include various resin materials such as polyimide resins, polycarbonate resins, polyurethane resins, acrylic resins such as polymethyl methacrylate, acetate resins, allyl resins, and silicone resins.

  As a constituent material of the frequency adjusting layer, for example, polyolefin such as polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl chloride, polystyrene, polyamide, polyimide, polycarbonate, poly- (4-methylpentene-1), ionomer, Acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyethylene terephthalate (PET), polybutylene terephthalate (PBT) Polyester), polyether, polyether ketone (PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), polyphenylene oxide, Sulphone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, other fluororesins, epoxy resins, phenol resins, urea resins, melamine resins, silicone resins, Polyurethane, etc., or resin materials such as copolymers, blends, polymer alloys, etc., and glass such as soda glass, crystalline glass, quartz glass, lead glass, potassium glass, borosilicate glass, and alkali-free glass Examples of the material include various crystals such as sapphire and quartz.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to this.

Example 1
<Manufacture of polarizing laminate>
First, a polyvinyl alcohol film is stretched in a water bath, dyed with an aqueous solution in which a dye is dissolved, treated with boric acid, washed with water, and dried to obtain a polarizing film having a thickness of 35 μm.

  On the other hand, using a polyamide resin (Grivory G21 EMS), a 0.5 mm sheet obtained by extrusion molding with a vent type single screw extruder is uniaxially stretched 1.5 times to form a 0.4 mm sheet shape. A first layer is obtained.

  On the other hand, using a polyamide resin (manufactured by Grilamid TR9 EMS), a 0.2 mm sheet-like second layer is obtained by extrusion molding with a vent type single screw extruder.

  Next, on one surface of the first layer, a two-component moisture-curable polyurethane adhesive (first adhesive) is applied to a thickness of 20 μm after drying with a bar coater. On one surface, a two-component moisture-curable polyurethane adhesive (second adhesive) is applied to a thickness of 20 μm after drying with a bar coater.

  Next, the first layer and the second layer to which the adhesive is applied are placed in an oven and heated until the solvent content in the adhesive is dried, so that the adhesive layer is formed on one surface of the first layer. A second laminate in which a first laminate in which (first adhesive layer) is laminated and an adhesive layer (second adhesive layer) is laminated on one surface of the second layer is obtained. Get the body.

  Thereafter, the first laminate is laminated on the polarizing film so that the first adhesive is in contact with one surface of the polarizing film, and the second adhesive is in contact with the other surface of the polarizing film. Thus, the second laminate was laminated on the polarizing film to obtain a laminate. Then, the laminated body was pressure-bonded to the first laminated body, the polarizing film, and the second laminated body using a rubber roll of a laminator to produce a polarizing laminated body having a total thickness of 0.75 mm.

  The first layer mainly contained semi-aromatic polyamide, and the second layer mainly contained alicyclic polyamide.

(Examples 2 to 4 and Comparative Example 1)
The polarizing laminates of Examples 2 to 4 and Comparative Example 1 were obtained in the same manner as in Example 1 except that the configuration of the polarizing laminate was changed as shown in the table.

  In Table 1, A is aliphatic polyamide TE55 (manufactured by EMS), and B in the table is aliphatic polyamide TR55LX (manufactured by EMS).

<Appearance evaluation>
The polarizing laminates produced in each Example and Comparative Example 1 were evaluated for appearance. Below, these evaluation methods are demonstrated.

1. Situation of generation of rainbow pattern The polarizing laminates of Examples 1 to 4 and Comparative Example 1 were punched out to a side of 6 cm, and then pre-dried at 60 ° C. for 1 day, and a rema molding machine (vacuum molding machine) CR- A polarizing wafer was prepared by inserting into a concave mold having a radius of curvature of 87 mm (6 curves) using 32 type and performing thermal bending while sucking at 143 ° C. for 4 minutes.

  Then, the produced polarizing wafer is placed on a backlight with a polarizer, and the appearance is observed with transmitted light in both the crossed Nicols and parallel Nicols states, and whether or not a rainbow pattern due to colored interference fringes is generated. I confirmed.

Each code | symbol is as follows, (circle) and (triangle | delta) set it as the pass, and made x fail.
○: No rainbow pattern △: Rainbow pattern was partially generated, but no problem in practical use ×: Rainbow pattern was generated overall, there was a problem in practical use

2. Occurrence of color loss The polarizing laminates of Examples 1 to 4 and Comparative Example 1 were punched out to a side of 6 cm, and then pre-dried at 60 ° C. for 1 day, and were subjected to rema molding machine (vacuum molding machine) CR- A polarizing wafer was prepared by inserting into a concave mold having a radius of curvature of 87 mm (6 curves) using 32 type and performing thermal bending while sucking at 143 ° C. for 4 minutes.

  Then, the produced polarization wafer is placed on a backlight with a polarizer, and in both states of crossed Nicols and parallel Nicols, appearance observation with transmitted light is performed, whether or not color loss occurs, that is, It was confirmed whether transmitted light was generated.

Each code | symbol is as follows, (circle) was set as the pass and x was set as the disqualification.
○: No color loss occurred x: Color loss occurred partially These results are summarized in Table 1.

  The polarizing laminate of each example resulted in the suppression of the occurrence of rainbow patterns and color loss compared to the polarizing laminate of the comparative example. Therefore, the polarizing laminate of each example can maintain a stable quality for a long period of time equivalent to or higher than that of a conventional product, and is excellent in workability.

DESCRIPTION OF SYMBOLS 1 Sunglasses 2 Frame 21 Rim part 22 Bridge part 23 Temple part 24 Nose pad part 3 Polarizing laminated body (lens)
31 Polarizing film 311 First surface 312 Second surface 32 First layer (first polyamide layer)
33 Second layer (second polyamide layer)
34 Adhesive layer (first adhesive layer)
35 Adhesive layer (second adhesive layer)

Claims (8)

A polarizing film;
A first layer provided on a first surface side which is one surface of the polarizing film and made of a material containing a semi-aromatic polyamide;
A polarizing laminate, comprising: a second layer that is provided on a second surface side opposite to the first surface and is made of a material containing an alicyclic polyamide.   The polarizing laminate according to claim 1, wherein the semi-aromatic polyamide includes an aromatic dicarboxylic acid and an aliphatic diamine as constituent monomers.   The polarizing laminate according to claim 1, wherein the retardation of the first layer is 2500 or more.   The polarizing laminate according to any one of claims 1 to 3, wherein the glass transition point of the semi-aromatic polyamide is lower than the glass transition point of the alicyclic polyamide.   The polarizing laminate according to any one of claims 1 to 4, wherein the polarizing laminate is a spectacle lens.   The polarizing laminate according to any one of claims 1 to 5, wherein the polarizing laminate is used in a state where the surface on which the second layer is provided faces the user's eyes. .   The polarizing laminate according to any one of claims 1 to 6, wherein the polarizing laminate has a curved plate shape, and the first layer is provided on the convex surface side.   An eyeglass comprising the polarizing laminate according to claim 1.

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