JP2022084455A - Long-sized optical laminate and method for manufacturing the same - Google Patents

Abstract

To provide an optical laminate which includes a resin layer including a resin containing a crystalline polymer, and is reduced in a curl amount when left under high temperature.SOLUTION: A long-sized optical laminate includes a resin layer (A) that is a layer including a resin (a1) containing a polymer having crystallinity and a laminate (M), in which the laminate (M) is composed of an adhesive layer (B) that is a layer of an adhesive and a resin layer (C) that is a layer of a resin (c1), the laminate (M) is arranged so that the adhesive layer (B) is arranged between the resin layer (C) and the resin layer (A), the adhesive layer (B) is provided so as to be brought into direct contact with the resin layer (C), and an absolute value of a thermal dimension change rate MDbc in a longitudinal direction and an absolute value of a thermal dimension change rate TDbc in a width direction of the laminate (M), an absolute value of a thermal dimension change rat MDd in a longitudinal direction and an absolute value of a thermal dimension change rate TDd in a width direction of the optical laminate, and a thickness ta of the resin layer (A) and a thickness tc of the resin layer (C) satisfy a specific condition.SELECTED DRAWING: Figure 1

Description

The present invention relates to a long optical laminate and a method for manufacturing the same.

A film containing a cyclic olefin resin is used as a base material for a transparent conductive film used for a touch panel or the like (Patent Document 1). Further, a crystalline resin film containing a polymer having crystallinity is also used as an optical element (Patent Documents 2 to 4). Hereinafter, the polymer having crystallinity is also referred to as a crystalline polymer.

Japanese Patent No. 6738448 Japanese Unexamined Patent Publication No. 2019-155609 Japanese Unexamined Patent Publication No. 2008-239845 International Publication No. 2008/026733

The image display device may include a touch panel. The touch panel is usually provided so as to be superimposed on the display screen of the image display device, but in order to improve visibility, it is required to make the touch panel thinner.
The crystalline resin film formed from the resin containing the crystalline polymer is excellent in mechanical strength and chemical resistance, and at the same time, is also excellent in transparency. Therefore, it is conceivable to laminate a functional layer such as a conductive layer on the surface of a crystalline resin film having a small thickness to form a laminated body, and use the laminated body as a component of a touch panel.
However, a crystalline resin film having a small thickness tends to curl by heating. Therefore, in the step of laminating a functional layer such as a conductive layer on a crystalline resin film, if the crystalline resin film is placed at a high temperature, the crystalline resin film may curl, and the functional layer may be curled with desired accuracy. It can be difficult to form.
In the technique of Patent Document 2, a protective film is attached to a crystalline resin film having a small thickness to prevent breakage and wrinkles. However, in the technique of Patent Document 2, it is difficult to sufficiently reduce the curl amount of the crystalline resin film when the crystalline resin film is placed at a high temperature.

Therefore, there is a need for an optical laminate containing a resin layer containing a resin containing a crystalline polymer and a reduced amount of curl when placed at a high temperature, and a method for producing the optical laminate.

As a result of diligent studies to solve the above problems, the present inventor has made the optical laminate an optical laminate containing a resin layer (A) containing a resin containing a crystalline polymer and a laminate (M). The present invention has been completed by finding that the above-mentioned problems can be solved by using an optical laminate satisfying a predetermined condition.
That is, the present invention provides the following.

[1] A long optical laminate including a resin layer (A), which is a layer containing a resin (a1) containing a crystalline polymer, and a laminate (M).
The laminated body (M) is composed of an adhesive layer (B) which is a layer of an adhesive and a resin layer (C) which is a layer of a resin (c1).
The laminated body (M) is arranged so that the adhesive layer (B) is arranged between the resin layer (C) and the resin layer (A).
The adhesive layer (B) is provided directly on the resin layer (C) and is provided.
The absolute value of the thermal dimensional change rate MDbc in the longitudinal direction and the absolute value of the thermal dimensional change rate TDbc in the width direction of the laminated body (M) satisfy the following condition (1).
The absolute value of the thermal dimensional change rate MDd in the longitudinal direction and the absolute value of the thermal dimensional change rate TDd in the width direction of the optical laminate satisfy the following condition (2), and the thickness ta of the resin layer (A) and the thickness ta. The thickness ct of the resin layer (C) satisfies the following condition (3).
A long optical laminate.
| MDbc | ≤0.1% and | TDbc | ≤0.1% (1)
| MDd | ≤0.15% and | TDd | ≤0.15% (2)
3 ≦ tk / ta ≦ 15 (3)
[2] Further, the long optical optics according to [1], wherein the thermal dimensional change rate MDa in the longitudinal direction and the thermal dimensional change rate TDa in the width direction of the resin layer (A) satisfy the following condition (4). Laminated body.
0.15% <MDa ≤ 1% and 0.15% <TDa ≤ 1% (4)
[3] The long optical laminate according to [1] or [2], wherein the glass transition temperature Tgc of the resin (c1) is 150 ° C. or higher.
[4] Of [1] to [3], wherein the resin (a1) and the resin (c1), or the resin (a1) or the resin (c1) contains a polymer containing an alicyclic structure. The long optical laminate according to any one of the above.
[5] The resin layer (A) is composed of a resin layer (A1), a resin layer (A2), and a resin layer (A3).
The resin layer (A1) is directly provided on the first surface of the resin layer (A2), and the resin layer (A3) is directly provided on the second surface of the resin layer (A2).
The resin layer (A1) and the resin layer (A3) are each made of the resin (a1).
The long optical laminate according to any one of [1] to [4], wherein the resin layer (A2) is made of a resin (a2) containing the resin (a1) and an ultraviolet absorber.
[6] Further includes at least one conductive layer (E).
The conductive layer (E) is directly attached to the first surface and the second surface of the resin layer (A), or directly to the first surface or the second surface of the resin layer (A). The long optical laminate according to any one of [1] to [5].
[7] The method for manufacturing a long optical laminate according to any one of [1] to [5].
Step (1) of preparing the long resin layer (C),
The adhesive layer (B) is formed on one surface of the resin layer (C), and the long laminated body (M) composed of the resin layer (C) and the adhesive layer (B) is formed. Obtaining process (2),
Including a step (3) of preparing the resin layer (A) and a step (4) of laminating the laminate (M) and the resin layer (A) to obtain a long optical laminate.
The step (2) includes a step (2a) of applying the adhesive on one surface of the resin layer (C).
The step (3) includes a step (3a) of melt-extruding and cooling the composition containing the resin (a1) to obtain a long extruded film, and a step (3b) of heating the extruded film.
A method for manufacturing a long optical laminate.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an optical laminate containing a resin layer containing a resin containing a crystalline polymer and a reduced amount of curl when placed at a high temperature, and a method for producing the optical laminate.

FIG. 1 is a cross-sectional view schematically showing an optical laminate according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing an optical laminate according to a second embodiment of the present invention. FIG. 3 is a cross-sectional view schematically showing an optical laminate according to a third embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing an optical laminate according to a fourth embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments and examples. However, the present invention is not limited to the embodiments and examples shown below, and may be arbitrarily modified and implemented without departing from the scope of claims of the present invention and the equivalent scope thereof.

In the following description, the "long" film means a film having a length of 5 times or more with respect to the width, preferably a film having a length of 10 times or more, and specifically, a roll. A film that has a length that allows it to be rolled up and stored or transported. The upper limit of the length of the film is not particularly limited and may be, for example, 100,000 times or less with respect to the width.

Unless otherwise specified, the adhesive is not only an adhesive in a narrow sense (an adhesive having a shear storage elastic modulus of 1 MPa to 500 MPa at 23 ° C after energy ray irradiation or heat treatment), but also a shear storage at 23 ° C. It also includes adhesives having an elastic modulus of less than 1 MPa.

In the following description, the diagonal direction of a long film indicates an in-plane direction of the film, which is neither parallel nor perpendicular to the longitudinal direction of the film, unless otherwise specified.

In the following description, the in-plane retardation Re of the layer is a value represented by Re = (nx-ny) × d unless otherwise specified. Here, nx represents the refractive index in the direction perpendicular to the thickness direction of the layer (in-plane direction) and in the direction giving the maximum refractive index. ny represents the refractive index in the in-plane direction of the layer and orthogonal to the direction of nx. d represents the thickness of the layer. The measurement wavelength is 590 nm unless otherwise specified.

In the following description, unless the directions of the elements are "parallel", "vertical" and "orthogonal", they are within the range that does not impair the effect of the present invention, for example, ± 3 °, ± 2 ° or ± 1 °. It may include an error within the range of.

In the following description, the thermal dimensional change rate of a film or layer in a certain direction means the dimensional change rate in that direction after heating the film or layer at 145 ° C. for 1 hour. Specifically, assuming that the dimension of the film or layer in a certain direction before heating is _LB and the dimension after heating at 145 ° C. for 1 hour is _LA , the rate of change in thermal dimension of the film or layer in that direction is It is calculated by the following formula (I).
Thermal dimensional change rate (%) = [(LB _{- LA} ) / _LB ] x 100 (I)
A positive sign of thermal dimensional change rate indicates that the film or layer shrinks in that direction due to heating, and a negative sign of thermal dimensional change rate indicates that the film or layer expands in that direction due to heating. Show that.

In the following description, the width direction in the film, layer, and laminate means the in-plane direction of the film, layer, and laminate, which is perpendicular to the longitudinal direction.

In the following description, the machine direction in the film, layer, and laminate usually coincides with the longitudinal direction of the long film.

In the following description, when one layer (referred to as the first layer) is directly connected to another layer (referred to as the second layer), the main surface of the first layer and the main surface of the second layer have. It means that the faces are in contact with each other without interposing another layer.

In the following description, the composition is not limited to a composition composed of two or more kinds of materials, and may be a composition composed of a single material.

[1. Overview of optical laminate]
The optical laminate according to the embodiment of the present invention includes a resin layer (A), which is a layer containing a resin (a1) containing a crystalline polymer, and a laminate (M), and is long. ..
The laminated body (M) is composed of an adhesive layer (B) which is a layer of an adhesive and a resin layer (C) which is a layer of a resin (c1).
The laminated body (M) is arranged so that the adhesive layer (B) is arranged between the resin layer (C) and the resin layer (A). That is, the resin layer (A), the adhesive layer (B), and the resin layer (C) are arranged in this order.
The adhesive layer (B) is provided directly on the resin layer (C). Therefore, there is no other layer between the adhesive layer (B) and the resin layer (C), and the surface of the adhesive layer (B) and the surface of the resin layer (C) are in contact with each other.
The resin layer (A), the adhesive layer (B), and the resin layer (C) contained in the optical laminate are all long.
The optical laminate may include any layer in addition to the resin layer (A) and the laminate (M).

(Conditions satisfied by the optical laminate)
The optical laminate of the present embodiment usually satisfies all of the following conditions (1) to (3).
| MDbc | ≤0.1% and | TDbc | ≤0.1% (1)
In the condition (1), MDbc represents the rate of change in thermal dimensions in the longitudinal direction of the laminated body (M). TDbc represents the rate of change in thermal dimensions of the laminated body (M) in the width direction.
| MDbc | is preferably 0.09% or less, more preferably 0.08% or less.
| TDbc | is preferably 0.098% or less, more preferably 0.095% or less.

| MDd | ≤0.15% and | TDd | ≤0.15% (2)
In the condition (2), MDd represents the rate of change in thermal dimensions in the longitudinal direction of the optical laminate. TDd represents the rate of change in thermal dimensions in the width direction of the optical laminate.
MDd is preferably 0.12% or less, more preferably 0.1% or less.
TDd is preferably 0.12% or less, more preferably 0.1% or less.

3 ≦ tk / ta ≦ 15 (3)
In the condition (3), ta represents the thickness of the resin layer (A), and tc represents the thickness ct of the resin layer (C).
The value of tc / ta is preferably 3.3 or more, more preferably 3.5 or more, and is preferably 14 or less, more preferably 13 or less, from the viewpoint of facilitating the handling of the wound body of the optical laminate. Is.

By satisfying all of the above conditions (1) to (3), the curl amount of the optical laminate can be reduced when the optical laminate is placed at a high temperature. In addition, it is possible to suppress the occurrence of wrinkles in the optical laminate during processing at a high temperature. Therefore, it can be expected that the processing of the optical laminate at high temperature, such as patterning the conductive layer on the surface of the optical laminate, can be performed with high accuracy.

Further, the resin layer (A) contained in the optical laminate preferably satisfies the following condition (4).
0.15% <MDa ≤ 1% and 0.15% <TDa ≤ 1% (4)
In the condition (4), MDa represents the rate of change in thermal dimensions in the longitudinal direction of the resin layer (A). TDa represents the rate of change in thermal dimensions in the width direction of the resin layer (A).
The optical laminate according to the present embodiment has a curl amount of the optical laminate when placed at a high temperature even if the contained resin layer (A) has a thermal dimensional change rate of more than 0.15%. Can be reduced.
MDa is preferably 0.18% or more, more preferably 0.2% or more, preferably 0.9% or less, and more preferably 0.8% or less.
The TDa is preferably 0.18% or more, more preferably 0.2% or more, preferably 0.9% or less, and more preferably 0.8% or less.

[2. First Embodiment]
The optical laminate according to the first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view schematically showing an optical laminate according to the first embodiment of the present invention. The optical laminated body 100 includes a resin layer 10 as a resin layer (A) and a laminated body 40 as a laminated body (M). The laminated body 40 is composed of an adhesive layer 20 as an adhesive layer (B) and a resin layer 30 as a resin layer (C). The resin layer 10 has a first surface 10U and a second surface 10D, and the resin layer 10 and the laminate 40 are laminated so that the laminate 40 is in contact with the second surface 10D of the resin layer 10. .. The adhesive layer 20 included in the laminated body 40 is arranged between the resin layer 30 and the resin layer 10. Therefore, the adhesive layer 20 is in contact with the second surface 10D of the resin layer 10. The adhesive layer 20 is provided directly on the resin layer 30. The resin layer 10 has a thickness ta. The resin layer 30 has a thickness ct. The thickness ta and the thickness ct satisfy the above condition (3).

In the present embodiment, the resin layer 10 as the resin layer (A) has a single-layer structure, but in another embodiment, it may have a multi-layer structure as described later. The resin layer 30 as the resin layer (C) has a single-layer structure, but in another embodiment, it may have a multi-layer structure. Hereinafter, the components included in the optical laminate 100 according to the present embodiment will be described.

[2.1. Resin layer (A)]
The resin layer (A) is a layer containing a resin (a1) containing a polymer having crystallinity. Hereinafter, the "resin (a1) containing a polymer having crystallinity" is also referred to as "crystalline resin (a1)".
The crystalline polymer means a polymer having a melting point Tm. "Having a melting point Tm" means that the melting point can be observed with a differential scanning calorimeter (DSC). In the following description, the "polymer having crystallinity" is also referred to as "crystalline polymer".

As the crystalline polymer contained in the crystalline resin (a1), among the polymers having an alicyclic structure in the molecule, those having crystallinity and polystyrene-based polymers having crystallinity (Japanese Patent Laid-Open No. 2011). -Refer to JP-A-118137). Hereinafter, a polymer having an alicyclic structure in the molecule is also referred to as an alicyclic structure-containing polymer. Among them, an alicyclic structure-containing polymer having crystallinity is preferable because it is excellent in mechanical strength, heat resistance, and moldability.

The alicyclic structure-containing polymer may be, for example, a polymer obtained by a polymerization reaction using a cyclic olefin as a monomer or a hydride thereof. As the alicyclic structure-containing polymer, one type may be used alone, or two or more types may be used in combination at any ratio.

Examples of the alicyclic structure contained in the alicyclic structure-containing polymer include a cycloalkane structure and a cycloalkene structure. Among these, the cycloalkane structure is preferable because it is easy to obtain an optical film having excellent properties such as thermal stability. The number of carbon atoms contained in one alicyclic structure is preferably 4 or more, more preferably 5 or more, preferably 30 or less, more preferably 20 or less, and particularly preferably 15 or less. be. When the number of carbon atoms contained in one alicyclic structure is within the above range, mechanical strength, heat resistance, and moldability are highly balanced.

In the alicyclic structure-containing polymer, the ratio of the structural units having an alicyclic structure to all the structural units is preferably 30% by weight or more, more preferably 50% by weight or more, and particularly preferably 70% by weight or more. .. The heat resistance can be improved by increasing the ratio of the structural units having an alicyclic structure in the alicyclic structure-containing polymer as described above.
Further, in the alicyclic structure-containing polymer, the balance other than the structural unit having the alicyclic structure is not particularly limited and may be appropriately selected depending on the purpose of use.

Examples of the crystalline alicyclic structure-containing polymer include the following polymers (α) to (δ). Among these, the polymer (β) is preferable as the alicyclic structure-containing polymer having crystallinity because the resin layer (A) having excellent heat resistance can be easily obtained.
Polymer (α): A ring-opening polymer of a cyclic olefin monomer having crystallinity.
Polymer (β): A hydride of the polymer (α) having crystallinity.
Polymer (γ): An addition polymer of a cyclic olefin monomer having crystallinity.
Polymer (δ): A hydride of the polymer (γ), etc., which has crystallinity.

Specifically, the alicyclic structure-containing polymer is a ring-opening polymer of dicyclopentadiene having crystallinity, and a hydride of the ring-opening polymer of dicyclopentadiene and having crystallinity. Is more preferable, and a hydride of a ring-opening polymer of dicyclopentadiene, which has crystallinity, is particularly preferable. Here, in the open-ring polymer of dicyclopentadiene, the ratio of the structural unit derived from dicyclopentadiene to all the structural units is usually 50% by weight or more, preferably 70% by weight or more, more preferably 90% by weight or more. More preferably, it refers to a polymer of 100% by weight.
The hydride of the ring-opening polymer of dicyclopentadiene preferably has a high proportion of racemic diad. Specifically, the proportion of the repeating unit racemic diad in the hydride of the ring-opening polymer of dicyclopentadiene is preferably 51% or more, more preferably 70% or more, and particularly preferably 85% or more. A high proportion of racemic diads indicates a high syndiotactic stereoregularity. Therefore, the higher the proportion of racemic diad, the higher the melting point of the hydride of the ring-opening polymer of dicyclopentadiene tends to be.
The proportion of racemo diads can be determined based on the ¹³ C-NMR spectral analysis described in Examples described below.

As the alicyclic structure-containing polymer having crystallinity as described above, a polymer obtained by the production method disclosed in International Publication No. 2018/062067 can be used.

The melting point Tm of the crystalline polymer is preferably 200 ° C. or higher, more preferably 230 ° C. or higher, and preferably 290 ° C. or lower. By using such a crystalline polymer having a melting point Tm, it is possible to obtain a resin layer (A) having a better balance between moldability and heat resistance.

Usually, the crystalline polymer has a glass transition temperature Tg. The specific glass transition temperature Tg of the crystalline polymer is not particularly limited, but is usually 85 ° C. or higher and usually 170 ° C. or lower.

The glass transition temperature Tg and the melting point Tm of the polymer can be measured by the following methods. First, the polymer is melted by heating, and the melted polymer is rapidly cooled with dry ice. Subsequently, using this polymer as a test piece, the glass transition temperature Tg and melting point Tm of the polymer were measured at a heating rate of 10 ° C./min (heating mode) using a differential scanning calorimeter (DSC). Can be measured.

The weight average molecular weight (Mw) of the crystalline polymer is preferably 1,000 or more, more preferably 2,000 or more, preferably 1,000,000 or less, and more preferably 500,000 or less. A crystalline polymer having such a weight average molecular weight has an excellent balance between molding processability and heat resistance.

The molecular weight distribution (Mw / Mn) of the crystalline polymer is preferably 1.0 or more, more preferably 1.5 or more, preferably 4.0 or less, and more preferably 3.5 or less. Here, Mn represents a number average molecular weight. A crystalline polymer having such a molecular weight distribution is excellent in molding processability.
The weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) of the crystalline polymer can be measured as polystyrene-equivalent values by gel permeation chromatography (GPC) using tetrahydrofuran as a developing solvent.

The proportion of the crystalline polymer in the crystalline resin (a1) is preferably 50% by weight or more, more preferably 70% by weight or more, and particularly preferably 90% by weight or more. By setting the ratio of the crystalline polymer to the lower limit of the above range or more, the heat resistance of the resin layer (A) can be effectively increased. The upper limit of the proportion of the crystalline polymer may be 100% by weight or less.

The crystalline polymer contained in the crystalline resin (a1) does not have to be crystallized before the resin layer (A) is produced. However, after the resin layer (A) is produced, the crystalline polymer contained in the resin layer (A) is preferably crystallized and preferably has a high crystallinity. The specific range of crystallinity can be appropriately selected depending on the desired performance, but is preferably 10% or more, more preferably 15% or more, still more preferably 30% or more. By setting the crystallinity of the crystalline polymer contained in the resin layer (A) to be equal to or higher than the lower limit of the above range, high heat resistance and chemical resistance can be imparted to the resin layer (A). The crystallinity of the crystalline polymer contained in the resin layer (A) can be measured by, for example, a density method.

The crystalline resin (a1) may contain any component in addition to the crystalline polymer. Optional components include, for example, antioxidants; light stabilizers; waxes; nucleating agents; optical brighteners; UV absorbers; inorganic fillers; colorants; flame retardants; flame retardants; antistatic agents; plasticizers. Agents; near-infrared absorbers; lubricants; fillers; and any polymers other than crystalline polymers; and the like. Further, as the arbitrary component, one kind may be used alone, or two or more kinds may be used in combination at any ratio.

The thickness ta of the resin layer (A) is arbitrary as long as the condition (3) is satisfied, but is preferably 5 μm or more, more preferably 10 μm or more, preferably 80 μm or less, and more preferably 70 μm or less.

The retardation of the resin layer (A) can be arbitrarily set depending on the use of the optical laminate. For example, the in-plane retardation Re of the resin layer (A) is preferably 30 nm or less, more preferably 20 nm or less, and usually 0 nm or more. When the in-plane retardation Re of the resin layer (A) is within the above range, the resin layer (A) of the optical laminate may have optical isotropic properties, for example, a base material of a touch panel. It can be suitably used as a preferable member.

[2.2. Adhesive layer (B)]
The adhesive layer (B) is a layer of an adhesive and is formed of the adhesive. Examples of the adhesive for forming the adhesive layer include those using various polymers as a base polymer. Examples of such a base polymer include an acrylic polymer, a urethane polymer, a polyester polymer, a rubber polymer, an epoxy polymer, and a silicone polymer. In addition, the adhesive may contain any component such as a polymerization initiator, a curing agent, an ultraviolet absorber, a colorant, and an antistatic agent in combination with the above-mentioned base polymer.
The adhesive includes an adhesive (pressure sensitive adhesive).

A commercially available product can be used as the adhesive. Further, since various adhesive layers are commercially available as a film having adhesiveness, it may be used.
The adhesive layer may have a single-layer structure or a multi-layer structure.

The thickness of the adhesive layer (B) is not particularly limited and may be in the range of, for example, 3 μm to 30 μm, for example, 5 μm to 20 μm.

[2.3. Resin layer (C)]
The resin layer (C) is a layer of the resin (c1) and is formed of the resin (c1). The resin (c1) is preferably a thermoplastic resin.

The resin (c1) usually contains a polymer, and may further contain any component as long as the effects of the present invention are not significantly impaired. Examples of any component that can be contained in the resin (c1) include the same components as those of any component that can be contained in the resin (a1).

The resin (c1) may contain the polymer alone or in any combination of two or more kinds. The proportion of the polymer in the resin (c1) is preferably 70% by weight or more, more preferably 80% by weight or more, still more preferably 85% by weight or more, and usually 100% by weight, with the resin (c1) as 100% by weight. It is the following, and may be 100% by weight.

Examples of the polymer that can be contained in the resin (c1) include an alicyclic structure-containing polymer; a styrene-based polymer (eg, a homopolymer of styrene or a styrene derivative or another monomer that can polymerize with the homopolymer). Polymers); Cellulosic polymers such as triacylcellulose; Polyethylenes such as polyethylene and polypropylene; Polyesters such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate; Polyarylate; polyether sulfone; polysulfone; polyarylsulfone; polyvinyl chloride; acrylic polymers such as polymethylmethacrylate and polyacrylonitrile; polyimide; polyamide. These polymers may be homopolymers or copolymers.

Among them, an alicyclic structure-containing polymer is preferable because it is excellent in mechanical strength, heat resistance, and moldability. Therefore, the resin (c1) preferably contains an alicyclic structure-containing polymer.

Examples of the alicyclic structure-containing polymer that can be contained in the resin (c1) include (1) norbornene-based polymer, (2) monocyclic cyclic olefin polymer, (3) cyclic conjugated diene polymer, and (4). ) Vinyl alicyclic hydrocarbon polymers, hydrides thereof and the like. The alicyclic structure-containing polymer can be selected from, for example, the polymers disclosed in JP-A-2002-321302. Examples of the alicyclic structure-containing polymer include "ZEONOR" and "ZEONEX" manufactured by Nippon Zeon Corporation; and "ARTON" manufactured by JSR Corporation.

The glass transition temperature Tgc of the resin (c1) is preferably 150 ° C. or higher, more preferably 155 ° C. or higher, preferably 180 ° C. or lower, and more preferably 170 ° C. or lower.
When the glass transition temperature Tgc of the resin (c1) is at least the above lower limit value, the heat resistance of the optical laminate can be effectively improved. Further, when Tgc is not more than the upper limit value, the moldability can be improved.

The surface of the resin layer (C) may be subjected to surface treatment such as corona treatment and plasma treatment.

[3. Second embodiment]
The optical laminate according to the second embodiment of the present invention will be described below with reference to the drawings.
FIG. 2 is a cross-sectional view schematically showing an optical laminate according to a second embodiment of the present invention.
The optical laminated body 200 includes a resin layer 210 as a resin layer (A) and a laminated body 240 as a laminated body (M). The resin layer 210 as the resin layer (A) has a multi-layer structure, and the resin layer 210 includes a resin layer 211 as the resin layer (A1), a resin layer 212 as the resin layer (A2), and a resin layer. The resin layer 213 as (A3) is provided. The resin layer 211 as the resin layer (A1) is directly provided on the first surface 212U of the resin layer 212 as the resin layer (A2). A resin layer 213 as a resin layer (A3) is directly provided on the second surface 212D of the resin layer 212. The laminated body 240 as the laminated body (M) is composed of an adhesive layer 220 as an adhesive layer (B) and a resin layer 230 as a resin layer (C). The resin layer 213 is directly provided with the adhesive layer 220 included in the laminated body 240.

The resin layer 210 has a first surface 210U and a second surface 210D, and the resin layer 210 and the laminate 240 are laminated so that the laminate 240 is in contact with the second surface 210D of the resin layer 210. .. The adhesive layer 220 is arranged between the resin layer 230 and the resin layer 213 included in the resin layer 210. Therefore, the adhesive layer 220 is in contact with the second surface 210D of the resin layer 210. The adhesive layer 220 is provided directly on the resin layer 230.

The resin layer 210 has a thickness ta. The thickness ta of the resin layer 210 as the resin layer (A) is, in the present embodiment, the total thickness of the resin layer 211, the resin layer 212, and the resin layer 213. The resin layer 230 has a thickness ct. The thickness ta and the thickness ct satisfy the above condition (3).

The second embodiment has the same configuration as that of the first embodiment except that the resin layer (A) is provided with the resin layer 210 instead of the resin layer 10. The adhesive layer 220 as the adhesive layer (B) has the same structure as the adhesive layer 20, and the resin layer 230 as the resin layer (C) has the same structure as the resin layer 30. Is omitted. Hereinafter, the resin layer (A) included in the optical laminate of the present embodiment will be further described.

The resin layer (A) according to the present embodiment is composed of a resin layer (A1), a resin layer (A2), and a resin layer (A3), and is composed of a resin layer (A1), a resin layer (A2), and a resin layer. It is composed of (A3).

[3.1. Resin layer (A1), resin layer (A3)]
The resin layer (A1) and the resin layer (A3) are each made of the resin (a1), and are each made of the resin (a1). The resin (a1) forming the resin layer (A1) and the resin (a1) forming the resin layer (A3) may be different from each other, but the curl amount of the resin layer (A) is reduced. Further, from the viewpoint of facilitating the setting of the laminating conditions of the resin layer (A), the same resin is preferable. The examples and preferred examples of the resin (a1) capable of forming the resin layer (A1) and the resin layer (A3) are the same as the examples of the resin (a1) and the preferred examples described in the first embodiment.

The ratio (ta1 / ta3) of the thickness ta1 of the resin layer (A1) to the thickness ta3 of the resin layer (A3) is, for example, 0.5 / 1 to 1 from the viewpoint of reducing the curl amount of the resin layer (A). It can be in the range of .5 / 1, preferably in the range of 0.7 / 1 to 1.3 / 1.

[3.2. Resin layer (A2)]
The resin layer (A2) is made of a resin (a2) containing the resin (a1) and an ultraviolet absorber, and is formed of the resin (a2).
The resin (a1) contained in the resin (a2) forming the resin layer (A2) includes the resin (a1) forming the resin layer (A1) and the resin (a1) forming the resin layer (A3), respectively. Although different resins may be used, the resin (a2) contained in the resin (a2) may be used from the viewpoint of adhesion between the resin layer (A2) and the resin layer (A1) or the resin layer (A3) and simplification of manufacturing equipment. It is preferable that the a1), the resin (a1) forming the resin layer (A1), and the resin (a1) forming the resin layer (A3) are the same resin.

Examples of the ultraviolet absorber that can be contained in the resin (a2) are not particularly limited, and are benzotriazole-based ultraviolet absorbers, triazine-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, acrylonitrile-based ultraviolet absorbers, and salicylate-based ultraviolet absorbers. Examples thereof include agents, cyanoacrylate-based UV absorbers, azomethine-based UV absorbers, indole-based UV absorbers, naphthalimide-based UV absorbers, and phthalocyanine-based UV absorbers. Examples of commercially available UV absorbers include "ADEKA STAB LA-31" manufactured by ADEKA, which is a benzotriazole-based UV absorber.

The resin (a2) may contain the ultraviolet absorber alone or in any combination of two or more kinds.
The amount of the ultraviolet absorber in the resin (a2) is preferably 2% by weight or more, more preferably 5% by weight or more, preferably 100% by weight, with the amount of the resin (a1) contained in the resin (a2) being 100% by weight. Is 20% by weight or less, more preferably 15% by weight or less. When the amount of the ultraviolet absorber is at least the above lower limit value, the ultraviolet absorbing property can be effectively imparted to the resin layer (A2). When the amount of the ultraviolet absorber is not more than the upper limit value, the bleed-out of the ultraviolet absorber from the resin layer (A2) can be reduced.

[4. Optical laminate containing conductive layer (E)]
The optical laminate according to the embodiment of the present invention may further include at least one conductive layer (E) in addition to the resin layer (A) and the laminate (M). The conductive layer (E) is a layer having conductivity. The optical laminate may be provided with two conductive layers (E), and the conductive layer (E) may be directly provided on each of the first surface and the second surface of the resin layer (A). However, the optical laminate is provided with only one conductive layer (E), and the conductive layer (E) is directly provided on only one side (first surface or second surface) of the resin layer (A). You may. Here, the second surface of the resin layer (A) is a surface facing the main surface of the resin layer (C) via the adhesive layer (B).
The optical laminate of the present embodiment has a small amount of curl when placed at a high temperature. Therefore, it can be expected that the optical laminate of the present embodiment can be processed accurately at high temperature.

[4.1. Third embodiment]
The optical laminate according to the third embodiment of the present invention includes a resin layer (A), a laminate (M), and a conductive layer (E). FIG. 3 is a cross-sectional view schematically showing an optical laminate according to a third embodiment of the present invention. The optical laminated body 300 includes a resin layer 310 as a resin layer (A), a laminated body 340 as a laminated body (M), and a conductive layer 350 as a conductive layer (E). The laminated body 340 is composed of an adhesive layer 320 as an adhesive layer (B) and a resin layer 330 as a resin layer (C). The resin layer 310 has a first surface 310U and a second surface 310D, and the resin layer 310 and the laminate 340 are laminated so that the laminate 340 is in contact with the second surface 310D of the resin layer 310. .. An adhesive layer 320 included in the laminated body 340 is arranged between the resin layer 330 and the resin layer 310. Therefore, the adhesive layer 320 is in contact with the second surface 310D of the resin layer 310. The adhesive layer 320 is provided directly on the resin layer 330.
The conductive layer 350 is provided directly on the first surface 310U of the resin layer 310.
The resin layer 310 has a thickness ta. The resin layer 330 has a thickness ct.
The optical laminate 300 satisfies the above conditions (1) to (3). The optical laminate 300 has the same configuration as the optical laminate 100, except that the conductive layer 350 is directly provided on the first surface 310U of the resin layer 310. Since the resin layer 310, the adhesive layer 320, and the resin layer 330 have the same configurations as the resin layer 10, the adhesive layer 20, and the resin layer 30, the description thereof will be omitted, and the conductive layer will be described below.

(Conductive layer (E))
The conductive layer (E) is a layer having conductivity. The conductive layer (E) usually contains a conductive material. Examples of conductive materials include metals and conductive metal oxides. Examples of metals and metal oxides include gold, silver, copper, platinum, lead, tin, nickel, aluminum, tungsten, molybdenum, chromium, titanium, indium, their alloys, indium-tin oxide (ITO). Be done. These conductive materials can be in the form of particles, wires, etc., for example.

The conductive layer (E) may contain an organic material in addition to the conductive material. The conductive layer (E) may be, for example, a cured product of a photosensitive composition containing conductive particles, an alkali-soluble resin, and a photopolymerization initiator.

Examples of the alkali-soluble resin include resins having a functional group such as a hydroxy group and a carboxy group, and specific examples thereof include a novolak resin having a phenolic hydroxy group, a polymer of a monomer having a hydroxy group, and hydroxy. Examples thereof include a copolymer of a monomer having a group and a monomer capable of copolymerizing with the monomer.

Examples of photopolymerization initiators include benzophenone derivatives, acetophenone derivatives, thioxanthone derivatives, benzyl derivatives, benzoin derivatives, oxime compounds, α-hydroxyketone compounds, α-aminoalkylphenone compounds, phosphine oxide compounds, and anthron compounds. , And anthraquinone compounds.

The photosensitive composition may be, for example, a composition whose solubility in a developing solution is lowered by irradiation with light, or a composition in which solubility in a developing solution is increased by irradiation with light. good.

The conductive layer (E) may be formed on the entire surface of the resin layer (A), or may be formed on a part of the resin layer (A). The conductive layer may have an arbitrary pattern such as a mesh shape or a striped shape.

The conductive layer (E) can be formed by any method. Examples of the method for forming the conductive layer (E) include a method of forming the conductive layer (E) by a photolithography method using a conductive photosensitive composition; a screen printing method, a gravure printing method, and the like using a conductive ink. Examples thereof include a method of forming by a printing method such as an inkjet printing method.

[4.2. Modification example of the third embodiment]
In another embodiment, the optical laminate may include, as the resin layer (A), a resin layer 210 containing an ultraviolet absorber instead of the resin layer 310. As a result, when the laminate (M) is peeled off from the optical laminate and then the conductive layer (E) is further formed on the second surface of the resin layer (A) by a method including irradiation with ultraviolet rays, the resin layer ( The influence on the conductive layer (E) formed on the first surface of A) can be reduced.

[4.3. Fourth Embodiment]
The optical laminate according to the fourth embodiment of the present invention includes a resin layer (A), a laminate (M), and a conductive layer (E). FIG. 4 is a cross-sectional view schematically showing an optical laminate according to a fourth embodiment of the present invention. The optical laminated body 400 includes a resin layer 410 as a resin layer (A), a conductive layer 450 as a conductive layer (E), and a laminated body 440 as a laminated body (M) in this order. The resin layer 410 has a first surface 410U and a second surface 410D. The conductive layer 450 is directly provided on the second surface 410D of the resin layer 410. The laminated body 440 is composed of an adhesive layer 420 as an adhesive layer (B) and a resin layer 430 as a resin layer (C). The adhesive layer 420 is provided directly on the resin layer 430. The laminated body 440 is arranged so that the adhesive layer 420 is arranged between the resin layer 430 and the conductive layer 450. Therefore, the adhesive layer 420 and the conductive layer 450 are arranged between the resin layer 430 and the resin layer 410.
The resin layer 410 has a thickness ta. The resin layer 430 has a thickness ct.
The optical laminate 400 satisfies the above conditions (1) to (3).
The optical laminate 400 has a small amount of curl when placed at a high temperature. Therefore, it can be expected that the optical laminate 400 can be processed accurately at a high temperature.
Since the resin layer 410, the adhesive layer 420, and the resin layer 430 included in the optical laminate 400 have the same configurations as the resin layer 10, the adhesive layer 20, and the resin layer 30, the description thereof will be omitted. Further, since the conductive layer 450 has the same structure as the conductive layer 350, the description thereof will be omitted.

[4.4. Modification example of the fourth embodiment]
In another embodiment, the optical laminate may include, as the resin layer (A), a resin layer 210 containing an ultraviolet absorber instead of the resin layer 410. As a result, when the laminate (M) is peeled off from the optical laminate and then the conductive layer (E) is further formed on the first surface of the resin layer (A) by a method including irradiation with ultraviolet rays, the resin layer ( The influence on the conductive layer (E) formed on the second surface of A) can be reduced.

[5. Manufacturing method of optical laminate]
The optical laminate can be manufactured by any method.
For example, the optical laminate can be produced by a method including the following steps (1) to (4). The method for manufacturing the optical laminate may include any step in addition to the following steps (1) to (4).

[5.1. Process (1)]
In the step (1), the long resin layer (C) is prepared. The step (1) is performed before the normal step (2). The step (1) may be performed at the same time as the step (3).
A commercially available product may be used as the resin layer (C). Further, the long resin layer (C) may be manufactured by melt-extruding the resin (c1) into a film and cooling it with a cooling device such as a cooling drum. The thickness of the resin layer (C) can be adjusted by adjusting the extrusion rate of the molten resin (c1), the take-up speed of the film, and the like.
The step (1) may include a step of applying a surface treatment such as a corona treatment or a plasma treatment to the resin layer (C).

[5.2. Process (2)]
In the step (2), the adhesive layer (B) is formed on one surface of the resin layer (C), and the long resin layer (C) and the adhesive layer (B) are formed. A laminate (M) is obtained.

As a method for forming the adhesive layer (B) on one surface of the resin layer (C), any method can be adopted depending on the type of the adhesive for forming the adhesive layer (B).

The step (2) may include a step (2a) of applying the adhesive onto one surface of the resin layer (C). Any method can be adopted as the coating method. Examples of the coating method include a wire bar coating method, a spray method, a roll coating method, a gravure coating method, a die coating method, a curtain coating method, a slide coating method, and an extrusion coating method.

The step (2) may further include a step (2b) of drying the coating layer obtained in the step (2a). The drying method may be any method such as vacuum drying and heat drying.

When a photocurable adhesive such as ultraviolet rays is used as the adhesive, the step (2) is a step (2c) of irradiating the coating layer obtained in the step (2a) or the step (2b) with light. ) May be included.
When a thermosetting adhesive is used as the adhesive, the step (2) may further include a step of heating the coating layer obtained in the step (2a) or the step (2b).

[5.3. Process (3)]
In the step (3), the resin layer (A) is prepared. A commercially available product may be used as the resin layer (A).

In the step (3), the composition containing the resin (a1) is melt-extruded and cooled to obtain a long extruded film (3a), and the extruded film is heated (3b) in this order. Can include.
The melt extrusion in the step (3a) may be a coextrusion of a plurality of types of resins. For example, the resin (a1) and the resin (a2) can be obtained so as to obtain an extruded film having a layer structure of (layer of resin (a1)) / (layer of resin (a2)) / (layer of resin (a1)). May be melted and co-extruded.

The thickness of the extruded film can be adjusted according to the desired thickness of the resin layer (A). For example, the thickness of the extruded film can be adjusted by adjusting the extrusion amount of the composition in melt extrusion, the take-up speed of the extruded film, and the like.

After the step (3a), a step of stretching the extruded film may be performed. For example, the resin layer (A) can be produced from the long extruded film obtained in the step (3a) by a step including the following steps (3e1), (3e2), (3b), and (3c).
Step (3e1): Preheating the extruded film Step (3e2): Stretching the preheated extruded film Step (3b): Heating the extruded film Step (3c): Cooling the heated extruded film Step to obtain resin layer (A)

Steps (3e1), (3e2), (3b), and (3c) are usually performed in this order.

The stretching direction in the step (3e2) is not particularly limited, and examples thereof include a longitudinal direction, a width direction, and an oblique direction. The direction of stretching may be one direction or two or more directions. The draw ratio is preferably 1.1 times or more, more preferably 1.2 times or more, preferably 10.0 times or less, more preferably 5.0 times or less, still more preferably 2.0 times or less. ..

By including the step (3b), the crystallization of the crystalline polymer contained in the extruded film is promoted. Therefore, the heat resistance of the resin layer (A) can be improved.

The heating temperature in the step (3b) can usually be in the range of the glass transition temperature Tg or more and the melting point Tm or less of the crystalline polymer that can be contained in the extruded film.

The preheating temperature T1 in the step (3e2), the stretching temperature T2 in the step (3e2), and the heating temperature T3 in the step (3b) preferably satisfy the following relationships.
T1 <T2 <T3

[5.4. Process (4)]
In the step (4), the laminated body (M) and the resin layer (A) are laminated to obtain a long optical laminated body.
The step (4) is performed after the normal steps (1) to (3). The laminating is performed so that the adhesive layer (B) is arranged between the resin layer (A) and the resin layer (C) included in the laminated body (M).
Laminating may be performed by a so-called roll-to-roll method. Lamination can be performed by pressing the laminated body (M) and the resin layer (A) with a nip roll or the like. Heat may be applied during laminating.

[5.5. Arbitrary process]
The method for producing an optical laminate of the present embodiment may further include any step in addition to the steps (1) to (4). Examples of such an arbitrary step include a step of forming a conductive layer (E) on the surface of the resin layer (A) included in the optical laminate, a step of transporting the optical laminate, and an optical process of winding the optical laminate. Examples thereof include a step of obtaining a wound body of the laminated body.

[6. Applications for optical laminates]
The optical laminate can be used as a component of any optical device. The optical laminate has a small amount of curl when placed at a high temperature. Therefore, an optical laminate can be suitably used as a base material for producing an optical element (for example, a conductive layer included in a touch panel) in which the forming step is performed at a high temperature.

Hereinafter, the present invention will be specifically described with reference to examples. However, the present invention is not limited to the examples shown below, and may be arbitrarily modified and implemented without departing from the scope of claims of the present invention and the equivalent scope thereof.

In the following description, "%" and "part" representing quantities are based on weight unless otherwise specified. In addition, the operations described below were performed under normal temperature and pressure conditions unless otherwise specified.

[Evaluation method]
(Method for measuring weight average molecular weight Mw and number average molecular weight Mn of polymer)
The weight average molecular weight Mw and the number average molecular weight Mn of the polymer were measured as polystyrene-equivalent values using a gel permeation chromatography (GPC) system (“HLC-8320” manufactured by Tosoh Corporation). At the time of measurement, an H type column (manufactured by Tosoh Corporation) was used as the column, and tetrahydrofuran was used as the solvent. The temperature at the time of measurement was 40 ° C.

(Measuring method of hydrogenation rate of polymer)
The hydrogenation rate of the polymer was measured by ¹ H-NMR measurement at 145 ° C. using orthodichlorobenzene _- d4 as a solvent.

(Measurement method of glass transition temperature Tg and melting point Tm)
The glass transition temperature Tg and the melting point Tm of the polymer were measured as follows. First, the polymer was melted by heating, and the melted polymer was rapidly cooled with dry ice. Subsequently, using this polymer as a test piece, the glass transition temperature Tg and melting point Tm of the polymer were measured at a heating rate of 10 ° C./min (heating mode) using a differential scanning calorimeter (DSC). It was measured.

(Measuring method of racemic diad ratio of polymer)
The ratio of racemic diads in the polymer was measured as follows. ¹³ C-NMR measurement of the polymer was carried out by applying the inverted-gated decoupling method at 200 ° C. using ordichlorobenzene _- d4 as a solvent. In the results of this ¹³ C-NMR measurement, the signal of 43.35 ppm derived from meso-diad and the signal of 43.43 ppm derived from racemic diad were used as the reference shift with the peak of 127.5 ppm of orthodichlorobenzene _- d4 as a reference shift. Was identified. Based on the intensity ratios of these signals, the proportion of racemic diads in the polymer was determined.

(Measurement method of thermal dimensional change rate of film)
The film was cut into squares having a size of 150 mm × 150 mm under an environment of 23 ° C. (room temperature) to prepare a sample film. Each side of the square was aligned with the film transport direction (ie, the longitudinal direction of the long film) or the width direction. This sample film was heated in an oven at 145 ° C. for 1 hour, cooled to 23 ° C. (room temperature), and then the lengths of the four sides of the sample film were measured.

Based on the measured lengths of each of the four sides, the rate of change in thermal dimensions of the sample film was calculated based on the following formula (I). In the formula (I), LB indicates the _side length of the sample film before heating, LB is 150 mm in this measurement, and _LA indicates the _side length of the sample film after heating.
Thermal dimensional change rate (%) = [(LB _{- LA} ) / _LB ] x 100 (I)
A positive sign of the thermal dimensional change rate indicates that the film shrinks due to heating, and a negative sign of the thermal dimensional change rate indicates that the film expands due to heating.

Then, the average value of the thermal dimensional change rate of the two sides along the film transport direction (that is, the longitudinal direction of the long film) is taken as the thermal dimensional change rate in the film transport direction (MD), that is, the long film. It was adopted as the rate of change in thermal dimensions in the longitudinal direction of. Further, the average value of the thermal dimensional change rates of the two sides along the width direction of the film was adopted as the thermal dimensional change rate in the width direction (TD) of the long film.

(Measuring method of film thickness)
The thickness of the film was measured using a contact type thickness gauge (Mitutoyo Co., Ltd., Code No. 543-390).

(Measuring method of film crystallinity)
The density of the sample film was measured using a helium gas replacement type dry automatic density meter "AccuPyc 1340" (manufactured by Micrometritics). Approximately 3 g of the sample film was cut into strips having a width of 30 mm or less, rolled into a 10 cm ³ container, and maintained at 25 ° C. for measurement. The density was determined from 10 repeated measurements.

The crystallinity x (%) was calculated by the following equation.
x = (1 / Da-1 / D) / (1 / Da-1 / Dc) × 100
In the above formula, x represents the degree of crystallinity. D (g / cm ³ ) represents the determined density of the sample film. Da indicates the complete amorphous density (g / cm ³ ) of the polymer forming the sample film. Db indicates the perfect crystal density (g / cm ³ ) of the polymer forming the sample film.

The following values were used as the complete amorphous density Da.
-Complete amorphous density Da = 1.0157 g / cm ³ of the dicyclopentadiene polymer hydride (COP) produced in Production Example 1.
-Complete amorphous density of polyethylene terephthalate (PET) Da = 1.335 g / cm ³

The following values were used as the perfect crystal density Dc.
-Perfect crystal density Dc = 1.0857 g / cm ³ of the dicyclopentadiene polymer hydride (COP) produced in Production Example 1.
-PET perfect crystal density Dc = 1.455 g / cm ³

(Measuring method of curl amount)
The film was cut into squares having a size of 150 mm × 150 mm under an environment of 23 ° C. (room temperature) to prepare a sample film. Each side of the square was aligned with the film transport direction (ie, the longitudinal direction of the long film) or the width direction. This sample film was heated in an oven at 145 ° C. for 1 hour and cooled to 23 ° C. (room temperature). The amount of the square of the sample film placed on the desk rising from the desk (curl amount) was measured with a ruler, and the average value of the squares was taken as the curl amount of the sample film. The curl amount of the sample film was evaluated according to the following criteria.
Best: 5 mm or less Good: Greater than 5 mm and less than 10 mm Defective: 10 mm or more

(Durability of optical laminate in patterning with ultraviolet rays)
With reference to Example 1 of International Publication No. 2018/168325, a mesh-like conductive layer was formed on the surface of the resin layer (A) of the obtained optical laminate.

(Formation of conductive layer (E1))
First, a photosensitive conductive paste (“RAYBRID” manufactured by Toray Industries, Inc.) is printed on the surface of the resin layer (A) of the optical laminate by a screen printing method, and dried at 100 ° C. for 10 minutes to obtain the photosensitive conductive paste. A laminate 1 having a layer structure of a layer (E'1) / a resin layer (A) / an adhesive layer (B) / a resin layer (C) was obtained.
The layer (E'1) of the photosensitive conductive paste included in the laminate 1 was irradiated with ultraviolet rays from the side of the layer (E'1) via an exposure mask having a mesh-like pattern using an exposure apparatus.
Next, the laminate was immersed in a 0.2 wt% sodium carbonate aqueous solution, then washed with ultrapure water and dried at 145 ° C. for 30 minutes on one surface of the resin layer (A) of the optical laminate. A patterned conductive layer was formed, and an optical laminate (D2) having a layer structure of a patterned conductive layer (E1) / resin layer (A) / adhesive layer (B) / resin layer (C) was obtained.

Next, the laminated body (M) composed of the adhesive layer (B) and the resin layer (C) is peeled off from the optical laminated body (D2) to form a layer structure of the patterned conductive layer (E1) / resin layer (A). The laminated body 2 to have was obtained.

(Formation of conductive layer (E2))
Next, the same paste as the photosensitive conductive paste used in the production of the laminate 1 was printed on the surface of the resin layer (A) of the laminate 2 by a screen printing method, and dried at 100 ° C. for 10 minutes to be photosensitive. A laminated body 3 having a layer structure of a conductive paste layer (E'2) / resin layer (A) / patterned conductive layer (E1) was obtained.
The layer (E'2) of the photosensitive conductive paste included in the laminate 3 was irradiated with ultraviolet rays from the side of the layer (E'2) via an exposure mask having a mesh-like pattern using an exposure apparatus.
Next, the laminate was immersed in a 0.2 wt% sodium carbonate aqueous solution, then washed with ultrapure water, dried at 145 ° C. for 30 minutes, and placed on the other surface of the resin layer (A) of the laminate 2. A patterned conductive layer (E2) was formed, and a laminated body 4 having a layer structure of a patterned conductive layer (E1) / a resin layer (A) / a patterned conductive layer (E2) was obtained.

In the above operation, the durability of the optical laminate (D1) in the patterning process was evaluated according to the following criteria.
A: A well-patterned conductive layer (E1) was formed without causing wrinkles in the optical laminate (D1). Moreover, a well-patterned conductive layer (E2) was formed without changing the conductive layer (E1).
B: The patterned conductive layer (E1) was formed without wrinkling the optical laminate (D1), but the conductive layer (E1) changed when the patterned conductive layer (E2) was formed. ..
C: In the step of forming the patterned conductive layer (E1), the optical laminated body (D1) was wrinkled, so that the patterned conductive layer (E1) and the patterned conductive layer (E2) could not be formed.
In the case of evaluation A or B, it can be said that the durability of the optical laminate (D1) in the patterning process is excellent.

[Manufacturing example 1. Production of crystalline resin (a1)]
The pressure resistant reactor made of metal was sufficiently dried and then replaced with nitrogen. In this metal pressure resistant reactor, 154.5 parts of cyclohexane, 42.8 parts of a 70% cyclohexane solution of dicyclopentadiene (endo content of 99% or more) (30 parts as the amount of dicyclopentadiene), and 1- 1.9 parts of hexene was added and heated to 53 ° C.

0.014 parts of the tetrachlorotungsten phenylimide (tetrahydrofuran) complex was dissolved in 0.70 parts of toluene to prepare a solution. To this solution, 0.061 part of a diethylaluminum ethoxide / n-hexane solution having a concentration of 19% was added and stirred for 10 minutes to prepare a catalytic solution. This catalyst solution was added to a pressure resistant reactor to initiate a ring-opening polymerization reaction. Then, the reaction was carried out for 4 hours while maintaining 53 ° C. to obtain a solution of a ring-opening polymer of dicyclopentadiene. The number average molecular weight (Mn) and weight average molecular weight (Mw) of the obtained ring-opening polymer of dicyclopentadiene are 8,750 and 28,100, respectively, and the molecular weight distribution (Mw / Mn) obtained from these. Was 3.21.

To 200 parts of the obtained solution of the ring-opening polymer of dicyclopentadiene, 0.037 parts of 1,2-ethanediol was added as a terminator, heated to 60 ° C., and stirred for 1 hour to stop the polymerization reaction. I let you. A part of a hydrotalcite-like compound (“Kyoward (registered trademark) 2000” manufactured by Kyowa Chemical Industry Co., Ltd.) was added thereto, and the mixture was heated to 60 ° C. and stirred for 1 hour. After that, 0.4 part of a filtration aid ("Radiolite (registered trademark) # 1500" manufactured by Showa Kagaku Kogyo Co., Ltd.) was added, and a PP pleated cartridge filter ("TCP-HX" manufactured by ADVANTEC Toyo Co., Ltd.) was used as an adsorbent. The solution was filtered off.

To 200 parts of a solution of a ring-opening polymer of dicyclopentadiene after filtration (polymer amount: 30 parts), 100 parts of cyclohexane is added, 0.0043 parts of chlorohydride carbonyltris (triphenylphosphine) ruthenium is added, and hydrogen is added. A hydrogenation reaction was carried out at a pressure of 6 MPa and 180 ° C. for 4 hours. As a result, a reaction solution containing a hydride of a ring-opening polymer of dicyclopentadiene was obtained. In this reaction solution, hydride was precipitated to form a slurry solution.

The hydride contained in the reaction solution and the solution were separated using a centrifuge and dried under reduced pressure at 60 ° C. for 24 hours to obtain a hydride of a crystallized dicyclopentadiene ring-opening polymer 28. I got 5 copies. The hydrogenation rate of this hydride was 99% or more, the glass transition temperature Tg was 93 ° C., the melting point (Tm) was 267 ° C., and the ratio of racemo diad was 89%.

100 parts of the hydride of the obtained ring-opening polymer of dicyclopentadiene is hydrated with an antioxidant (tetrakis [methylene-3- (3', 5'-di-t-butyl-4'-hydroxyphenyl) propionate] methane. BASF Japan's "Irganox (registered trademark) 1010") After mixing 1.1 parts, a twin-screw extruder equipped with four die holes with an inner diameter of 3 mmΦ (product name "TEM-37B", manufactured by Toshiba Machinery Co., Ltd.) ). A mixture of a hydride of a ring-opening polymer of dicyclopentadiene and an antioxidant is formed into a strand shape by hot melt extrusion molding, and then shredded with a strand cutter to form a pellet-shaped crystal as a resin (a1). A sex resin (COP1) was obtained. The operating conditions of the twin-screw extruder were as follows.
・ Barrel set temperature = 270 to 280 ° C
・ Die set temperature = 250 ℃
・ Screw rotation speed = 145 rpm

[Manufacturing example 2. Manufacture of resin (a2)]
A twin-screw extruder equipped with a screw having a total length of 1848 mm and a diameter of 44 mm (manufactured by Toshiba Corporation, ratio L / D = 42 of screw length L and screw diameter D) was prepared. This screw had a total of three kneading zones at positions at distances of 685 mm, 920 mm and 1190 mm from the upstream end of the screw. Here, the distance from the upstream end of the screw to the position of the kneading zone means the distance from the upstream end of the screw to the upstream end of the kneading zone. Further, the upstream means the upstream in the flow direction of the resin. Further, the ratio Lnx / D of the length Lnx of each kneading zone to the diameter D of the screw is Lnx / D = 4, Lnx / D = 2 and Lnx / D = 2 in order from the upstream kneading zone. rice field.

In this twin-screw extruder, 100 parts of a crystalline resin (COP1) as the resin (a1) produced in Production Example 1 and a benzotriazole-based ultraviolet absorber (“LA-31” manufactured by ADEKA, molecular weight 659). Nine parts were added and kneaded to obtain a crystalline resin (COP2) as a resin (a2) in which the ratio of the ultraviolet absorber to the crystalline resin (COP1) was 9.0%.

[Example 1]
(1-1. Step (1): Step of obtaining the resin layer (C) from the resin (c1))
An amorphous resin (Zeonex 790R, Tg = 163 ° C.; manufactured by Nippon Zeon Co., Ltd.) containing an alicyclic structure-containing polymer as the resin (c1) was prepared, and a heat-melt extrusion film forming machine equipped with a T-die was used. A resin film (thickness 188 μm) as a long resin layer (C) having a width of about 1350 mm was obtained. The operating conditions of the film forming machine were as follows.
-Barrel set temperature = 270 ° C to 290 ° C
・ Die temperature = 270 ℃
・ Cast roll temperature = 150 ℃
The resin film was wound up into a roll form.

(1-2. Step (2): Step of obtaining a laminated body (M))
(1-2-1. Step (2a): Step of applying an adhesive to the resin layer (C))
The resin layer (C) is pulled out from the roll of the resin layer (C) made of the amorphous resin produced in (1-1), and the output is 500 W and the electrode length is 1 using a corona processing device (manufactured by Kasuga Electric Co., Ltd.). One side was subjected to discharge treatment (corona treatment) under the conditions of .35 m and a transport speed of 10 m / min. Acrylic adhesive (“Mastak Series” manufactured by Fujimori Kogyo Co., Ltd.) as an adhesive is applied to the surface of the resin layer (C) subjected to this discharge treatment using a die coater so that the dry film thickness is 10 μm. A coating film having an adhesive coating layer formed on one surface of the resin layer (C) was produced.

(1-2-3. Step (2b): Step of drying the coating layer)
Then, the coating film is passed through a drying oven at 100 ° C., and has a layer structure of (resin layer (C) made of amorphous resin (c1)) / (adhesive layer (B)). A long two-layer film as a body (M) was produced. For the laminated body (M), the thermal dimensional change rate was measured by the above method.

(1-3. Step (3): Step of preparing the resin layer (A))
(1-3-1. Step (3a))
The crystalline resin (COP1) produced in Production Example 1 was molded using a hot melt extrusion film molding machine equipped with a T-die to obtain a long extruded film (s) (thickness 20 μm) having a width of about 1350 mm. .. The operating conditions of the film forming machine were as follows.
・ Barrel set temperature = 280 ° C to 300 ° C
・ Die temperature = 270 ℃
・ Cast roll temperature = 80 ℃

(1-3-2. Stretching and heating (crystallization) step (3b))
The extruded film (s) produced in (1-3-1) is supplied to a transverse stretching machine using the tenter method, and while adjusting the take-up tension and the tenter chain tension, the film is increased 1.35 times in the transverse direction. It was stretched. The extruded film (s) was preheated at a temperature of 120 ° C. before stretching. The stretching temperature was 140 ° C., and after stretching, heating was performed at a temperature of 160 ° C. to promote crystallization of the resin (COP1). After heating, the film was cooled at a temperature of 100 ° C. to produce a long film as the resin layer (A). With respect to the resin layer (A), the thickness, the rate of change in thermal dimensions and the degree of crystallinity were measured by the above-mentioned methods.

(1-4. Step of laminating the laminated body (M) and the resin layer (A) (4))
After cooling, the laminate (M) produced in (1-2) is bonded to one side of the film as the resin layer (A) with a nip roll, and the resin layer (C) / adhesive layer (B) / resin layer is bonded. A long optical laminate (D1) having the layer structure of (A) was produced. For the optical laminate (D1), the thermal dimensional change rate was measured by the above method. The curl amount of the optical laminate (D1) was measured by the above method. In addition, the durability of the optical laminate (D1) in the patterning process by ultraviolet rays was evaluated by the above method.

(1-5. Forming step of conductive layer (E))
A conductive layer (E) was formed on the exposed surface of the resin layer (A) of the optical laminate (D1) by the above method to obtain an optical laminate (D2).

[Examples 2 and 3]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Example 4]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film (s) was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Example 5]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-As the resin layer (A), a polyethylene terephthalate (PET) film (Cosmo Shine E5100; manufactured by Toyobo Co., Ltd.) is annealed at 170 ° C. and 9.8N using an annealing device (IN-1700; manufactured by Lab Co., Ltd.). The film was used.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Example 6]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-2. Step (2a)), the polyimide (PI) film (Kapton 500V; manufactured by Toray Industries, Inc., glass transition) was used as the resin layer (C) without performing (1-1. Step (1)). Temperature Tg = 300 ° C., thickness 125 μm) was used.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film (s) was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

[Example 7]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
In (1-2. Step (2a)), the polyethylene naphthalate (PEN) film (Theonex Q51; manufactured by Teijin Limited, glass) was used as the resin layer (C) without performing (1-1. Step (1)). The transition temperature Tg = 121 ° C., thickness 188 μm) was used.
-In the step (1-2-3. Step (2b)), an annealing device (IN-1700; manufactured by Labo Co., Ltd.) was used to perform annealing at 170 ° C. and 9.8 N to prepare a laminate (M). did.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film (s) was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

[Example 8]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
In (1-1. Step (1)), an amorphous resin containing an alicyclic structure-containing polymer (Zeonex T62R, Tg = 154 ° C.; manufactured by Zeon Corporation) was used as the resin layer (c1). ..
-The operating conditions of the film forming machine in (1-1. Step (1)) were changed as follows.
-Barrel set temperature = 265 ° C to 285 ° C
・ Die temperature = 265 ° C
・ Cast roll temperature = 144 ℃
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film (s) was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

[Example 9]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.
-Instead of (1-3-1. Step (3a)), the following steps are performed to obtain an extruded film (m1), and in (1-3-2. Step (3b)), the extruded film (s) is obtained. ), An extruded film (m1) was used. As a result, a resin layer (A) having a multi-layer structure having a layer structure of (resin (COP1) layer) / (resin (COP2) layer) / (resin (COP1) layer) was obtained. A layer of resin (COP1) is directly attached to both sides of the layer of resin (COP2). Here, the layer of the resin layer (COP1) corresponds to the resin layer (A1) or the resin layer (A3), and the layer of the resin (COP2) corresponds to the resin layer (A2).

(Manufacturing of extruded film (m1))
A double-flight single-screw extruder (screw diameter D = 50 mm, screw length L to screw diameter D ratio L / D = 28) equipped with a polymer filter having a leaf disk shape with an opening of 3 μm is available. did. The crystalline resin (COP2) containing an ultraviolet absorber produced in Production Example 2 was introduced into this single-screw extruder, melted, and supplied to a single-layer die via a feed block.

On the other hand, one single-screw extruder (screw diameter D = 50 mm, screw length L to screw diameter D ratio L / D = 30) equipped with a polymer filter having a leaf disk shape with an opening of 3 μm is prepared. did. The crystalline resin (COP1) as the resin (a1) produced in Production Example 1 was introduced into this single-screw extruder, melted, and supplied to the single-layer die via a feed block.

After that, the resin (a1) is discharged as a film-like laminate having a layer structure of (resin (a1) layer) / (resin (a2) layer) / (resin (a1) layer). ) And the crystalline resin (COP2) containing an ultraviolet absorber as the resin (a2) were discharged from a single-layer die in a molten state at 260 ° C. to perform coextrusion molding. Then, the discharged laminate was cast on a cooling roll whose temperature was adjusted to 80 ° C. to obtain a long extruded film (m1) having a multi-layer structure.

[Example 10]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-Instead of (1-3-1. Step (3a)), the same operation as in (Manufacturing of the extruded film (m1)) of Example 9 was carried out to obtain an extruded film (m1).
-In (1-3-2. Step (3b)), an extruded film (m1) was used instead of the extruded film (s). As a result, a resin layer (A) having a multi-layer structure was obtained. The layer structure of the obtained resin layer (A) is the same as that of the resin layer (A) obtained in Example 9.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Example 11]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In Example 9 (manufacturing of extruded film (m1)), the following items were changed to obtain an extruded film (m2).
The cooling roll speed was adjusted so that the total thickness of the extruded film (m2) was 42 μm.
-In (1-3-2. Step (3b)), the extruded film (m2) was used instead of the extruded film (s), and the draw ratio was increased to 1.2 times. As a result, a resin layer (A) having a multi-layer structure was obtained. The layer structure of the obtained resin layer (A) is the same as that of the resin layer (A) obtained in Example 9.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Comparative Example 1]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.

[Comparative Example 2]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

[Comparative Example 3]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-1. Step (1)), the extrusion amount of the resin (c1) was adjusted so that the thickness of the resin layer (C) became the thickness shown in the table.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

[Comparative Example 4]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1 except that the following items were changed.
-In (1-2. Step (2a)), a PET film (A4100; manufactured by Toyobo Co., Ltd., glass transition temperature 70 ° C., thickness 125 μm)) was used as the resin layer (C).
-In the step (1-2-3. Step (2b)), an annealing device (IN-1700; manufactured by Labo Co., Ltd.) was used to perform annealing at 170 ° C. and 9.8 N to prepare a laminate (M). did.
-In (1-3-1. Step (3a)), the extrusion amount of the crystalline resin (COP1) was adjusted so that the thickness of the extruded film was 42 μm.
-In (1-3-2. Step (3b)), the draw ratio was set to 1.2 times.

The composition of each layer and the evaluation results of the optical laminate (D1) are shown in the table below.
The abbreviations in the table below have the following meanings.
"COP1": A film of a resin (COP1) having a single-layer structure manufactured from an extruded film (s) "COP1 / COP2 / COP1": A film produced from an extruded film (m1) or an extruded film (m2) (resin). (COP1) layer) / (resin (COP2) layer) / (resin (COP1) layer) film "PET (E5100)": polyethylene terephthalate film (Cosmo Shine E5100; manufactured by Toyo Spinning Co., Ltd.)
"PET (A4100)": Polyethylene terephthalate film (A4100; manufactured by Toyobo Co., Ltd.)
"PI": Polyimide film (Kapton 500V; manufactured by Toray DuPont)
"PEN": Polyethylene naphthalate film (Theonex Q51; manufactured by Teijin Limited)
"790R": A film of a resin containing an alicyclic structure-containing polymer (Zeonex 790R; manufactured by Nippon Zeon Co., Ltd.) "T62R": A film of a resin containing an alicyclic structure-containing polymer (Zeonex T62R; manufactured by Nippon Zeon Co., Ltd.) "AcAD": Layer of acrylic pressure-sensitive adhesive ("Mustak series" manufactured by Fujimori Kogyo Co., Ltd.) "Tgc": Glass transition temperature of the resin (c1) constituting the resin layer (C) "MDa": Of the resin layer (A) Thermal dimension change rate in the transport direction (longitudinal direction) "TDa": Thermal dimension change rate in the width direction of the resin layer (A) "MDbc": Thermal dimension change rate in the transport direction (longitudinal direction) of the laminated body (M) " TDbc ”: Thermal dimensional change rate in the width direction of the laminated body (M)“ MDd ”: Thermal dimensional change rate in the transport direction (longitudinal direction) of the optical laminated body (D1)“ TDd ”: Thermal dimensional change rate of the optical laminated body (D1) Rate of change in thermal dimension in the width direction "ta": Thickness of the resin layer (A) "tb": Thickness of the adhesive layer (B) "tk": Thickness of the resin layer (C) "Ca": Of the resin layer (A) Degree of crystallization (%)
"Tm": Melting point of the resin constituting the resin layer (A)

From the above results, the following matters can be understood.
The optical laminate (D1) according to the example, which satisfies all of the conditional equations (1) to (3), had a good evaluation of the curl amount. Further, the conductive layer (E1) having a good pattern was formed without causing wrinkles in the optical laminate (D1).
Further, the optical laminates (D1) according to Examples 1 to 11, which satisfy the conditional formulas (4) in addition to the conditional formulas (1) to (3), have a resin layer in which MDa and TDa are larger than 0.15%. It can be seen that the evaluation of the curl amount is good even if A) is provided.
Further, the optical lamination according to Examples 1 to 4 and Examples 9 to 11, wherein both the resin contained in the resin layer (A) and the resin forming the resin layer (C) contain an alicyclic structure-containing polymer. It can be seen that the body (D1) has the best evaluation of the amount of curl.
Further, the optical laminate according to Examples 9 to 11 has a layer structure in which the resin layer (A) has a layer structure of (resin (COP1) layer) / (resin (COP2) layer) / (resin (COP1) layer). In (D1), in addition to being able to satisfactorily form the patterned conductive layer (E1), the patterned conductive layer (E2) is formed on the resin layer (A) without affecting the conductive layer (E1). I know I can do it. Therefore, it can be seen that the optical laminate (D1) according to Examples 9 to 11 is particularly suitable for producing a conductive film in which conductive layers are formed on both sides of the resin layer (A).

On the other hand, the optical laminate (D1) according to the comparative example, which does not satisfy any of the conditional equations (1) to (3), had a poor evaluation of the curl amount, and the optical laminate (D1) was wrinkled. , It can be seen that the patterned conductive layer (E1) cannot be formed.

The above results indicate that the optical laminate of the present invention has a small amount of curl when placed at a high temperature of 145 ° C. Therefore, it can be expected that the optical laminate of the present invention can be processed accurately at high temperatures.

10 Resin layer (resin layer (A))
10U First surface 10D Second surface 20 Adhesive layer (adhesive layer (B))
30 Resin layer (resin layer (C))
40 Laminated body (Laminated body (M))
100 Optical laminate 200 Optical laminate 210 Resin layer (resin layer (A))
210U First surface 210D Second surface 211 Resin layer (resin layer (A1))
212 Resin layer (resin layer (A2))
212U First surface 212D Second surface 213 Resin layer (resin layer (A3))
220 Adhesive layer (adhesive layer (B))
230 Resin layer (resin layer (C))
240 laminated body (laminated body (M))
300 Optical laminate 310 Resin layer (resin layer (A))
310U First surface 310D Second surface 320 Adhesive layer (adhesive layer (B))
330 Resin layer (resin layer (C))
340 laminated body (laminated body (M))
350 Conductive layer (conductive layer (E))
400 Optical laminate 410 Resin layer (resin layer (A))
410U First surface 410D Second surface 420 Adhesive layer (adhesive layer (B))
430 Resin layer (resin layer (C))
440 laminated body (laminated body (M))
450 Conductive layer (conductive layer (E))

Claims (7)

A long optical laminate containing a resin layer (A), which is a layer containing a resin (a1) containing a crystalline polymer, and a laminate (M).
The laminated body (M) is composed of an adhesive layer (B) which is a layer of an adhesive and a resin layer (C) which is a layer of a resin (c1).
The laminated body (M) is arranged so that the adhesive layer (B) is arranged between the resin layer (C) and the resin layer (A).
The adhesive layer (B) is provided directly on the resin layer (C) and is provided.
The absolute value of the thermal dimensional change rate MDbc in the longitudinal direction and the absolute value of the thermal dimensional change rate TDbc in the width direction of the laminated body (M) satisfy the following condition (1).
The absolute value of the thermal dimensional change rate MDd in the longitudinal direction and the absolute value of the thermal dimensional change rate TDd in the width direction of the optical laminate satisfy the following condition (2), and the thickness ta of the resin layer (A) and the thickness ta. The thickness ct of the resin layer (C) satisfies the following condition (3).
A long optical laminate.
| MDbc | ≤0.1% and | TDbc | ≤0.1% (1)
| MDd | ≤0.15% and | TDd | ≤0.15% (2)
3 ≦ tk / ta ≦ 15 (3) Further, the long optical laminate according to claim 1, wherein the thermal dimensional change rate MDa in the longitudinal direction and the thermal dimensional change rate TDa in the width direction of the resin layer (A) satisfy the following condition (4).
0.15% <MDa ≤ 1% and 0.15% <TDa ≤ 1% (4) The long optical laminate according to claim 1 or 2, wherein the glass transition temperature Tgc of the resin (c1) is 150 ° C. or higher. The invention according to any one of claims 1 to 3, wherein the resin (a1) and the resin (c1), or the resin (a1) or the resin (c1) contains a polymer containing an alicyclic structure. The long optical laminate described. The resin layer (A) is composed of a resin layer (A1), a resin layer (A2), and a resin layer (A3).
The resin layer (A1) is directly provided on the first surface of the resin layer (A2), and the resin layer (A3) is directly provided on the second surface of the resin layer (A2).
The resin layer (A1) and the resin layer (A3) are each made of the resin (a1).
The long optical laminate according to any one of claims 1 to 4, wherein the resin layer (A2) is made of a resin (a2) containing the resin (a1) and an ultraviolet absorber. Further including at least one conductive layer (E),
The conductive layer (E) is directly attached to the first surface and the second surface of the resin layer (A), or directly to the first surface or the second surface of the resin layer (A). The long optical laminate according to any one of claims 1 to 5. The method for manufacturing a long optical laminate according to any one of claims 1 to 5.
Step (1) of preparing the long resin layer (C),
The adhesive layer (B) is formed on one surface of the resin layer (C), and the long laminated body (M) composed of the resin layer (C) and the adhesive layer (B) is formed. Obtaining process (2),
Including a step (3) of preparing the resin layer (A) and a step (4) of laminating the laminate (M) and the resin layer (A) to obtain a long optical laminate.
The step (2) includes a step (2a) of applying the adhesive on one surface of the resin layer (C).
The step (3) includes a step (3a) of melt-extruding and cooling the composition containing the resin (a1) to obtain a long extruded film, and a step (3b) of heating the extruded film.
A method for manufacturing a long optical laminate.

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