JP7571499B2 - Long optical laminate and manufacturing method thereof - Google Patents

Description

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

Films containing cyclic olefin resins are used as substrates for transparent conductive films used in touch panels and the like (Patent Document 1). Crystalline resin films containing polymers with crystallinity are also used as optical elements (Patent Documents 2 to 4). Hereinafter, polymers with crystallinity are also referred to as crystalline polymers.

Patent No. 6738448 JP 2019-155609 A JP 2008-239845 A International Publication No. 2008/026733

2. Description of the Related Art Image display devices may include a touch panel. The touch panel is usually provided on top of a display screen of the image display device, but there is a demand for thinner touch panels to improve visibility.
A crystalline resin film formed from a resin containing a crystalline polymer has excellent mechanical strength and chemical resistance, and is also excellent in transparency. Therefore, it is considered that a functional layer such as a conductive layer is laminated on the surface of a thin crystalline resin film to form a laminate, and the laminate is used as a component of a touch panel.
However, a crystalline resin film having a small thickness tends to curl when heated, and therefore, if the crystalline resin film is placed under high temperatures in a step of laminating a functional layer such as a conductive layer on the crystalline resin film, the crystalline resin film may curl, which may make it difficult to form the functional layer with a desired accuracy.
In the technology of Patent Document 2, a protective film is attached to a thin crystalline resin film to prevent breakage and wrinkles from occurring. However, in the technology of Patent Document 2, it is difficult to sufficiently reduce the amount of curling of the crystalline resin film when the crystalline resin film is placed under high temperatures.

Therefore, there is a demand for an optical laminate that includes a resin layer containing a resin that includes a crystalline polymer and that exhibits reduced curling when exposed to high temperatures, and a method for producing the optical laminate.

Means for Solving the Problems The present inventors conducted intensive research to solve the above problems, and as a result, discovered that the above problems can be solved by making the optical laminate an optical laminate comprising a resin layer (A) containing a resin containing a crystalline polymer and a laminate (M), and by making the optical laminate an optical laminate that satisfies certain conditions, and thus completed the present invention.
That is, the present invention provides the following.

[1] A long optical laminate comprising a resin layer (A) containing a resin (a1) containing a polymer having crystallinity, and a laminate (M),
The laminate (M) comprises an adhesive layer (B) which is an adhesive layer, and a resin layer (C) which is a layer of a resin (c1),
the laminate (M) is disposed so that the adhesive layer (B) is disposed between the resin layer (C) and the resin layer (A);
The adhesive layer (B) is provided directly on the resin layer (C),
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 laminate (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 tc of the resin layer (C) satisfy 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≦tc/ta≦15 (3)
[2] The long optical laminate 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) further satisfy the following condition (4):
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] The long optical laminate according to any one 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.
[5] The resin layer (A) comprises a resin layer (A1), a resin layer (A2), and a resin layer (A3),
the resin layer (A1) is provided directly on a first surface of the resin layer (A2), and the resin layer (A3) is provided directly on a second surface of the resin layer (A2);
The resin layer (A1) and the resin layer (A3) each contain the resin (a1),
The long optical laminate according to any one of [1] to [4], wherein the resin layer (A2) is made of the resin (a1) and a resin (a2) containing an ultraviolet absorber.
[6] Further comprising at least one conductive layer (E),
The conductive layer (E) is provided on the first surface and the second surface of the resin layer (A), or directly on the first surface or the second surface of the resin layer (A). [1] to [5] Any one of the long optical laminates described above.
[7] A method for producing a long optical laminate according to any one of [1] to [5],
A step (1) of preparing a long resin layer (C);
A step (2) of forming the adhesive layer (B) on one surface of the resin layer (C) to obtain a long laminate (M) composed of the resin layer (C) and the adhesive layer (B);
The method includes the steps of: (3) preparing the resin layer (A); and (4) 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 onto one surface of the resin layer (C),
The step (3) includes a step (3a) of melt-extruding a composition containing the resin (a1) and cooling it to obtain a long extruded film, and a step (3b) of heating the extruded film.
A method for producing a long optical laminate.

The present invention provides an optical laminate that includes a resin layer containing a resin that includes a crystalline polymer and that exhibits reduced curling when exposed to high temperatures, and a method for producing the optical laminate.

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

The present invention will be described in detail below with reference to embodiments and examples. However, the present invention is not limited to the embodiments and examples shown below, and may be modified as desired without departing from the scope of the claims of the present invention and their equivalents.

In the following description, a "long" film refers to a film that is 5 times or more longer than its width, preferably 10 times or more longer, and specifically refers to a film that is long enough to be wound into a roll for storage or transportation. There is no particular upper limit to the length of the film, and it can be, for example, 100,000 times or less than its width.

Unless otherwise specified, the term "adhesive" includes not only adhesives in the narrow sense (adhesives whose shear storage modulus at 23°C is 1 MPa to 500 MPa after irradiation with energy rays or after heat treatment), but also pressure-sensitive adhesives whose shear storage modulus at 23°C is less than 1 MPa.

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

In the following description, the in-plane retardation Re of a layer is a value expressed as Re = (nx - ny) x d, unless otherwise specified. Here, nx represents the refractive index in the direction perpendicular to the thickness direction of the layer (in-plane direction) that gives the maximum refractive index. ny represents the refractive index in the in-plane direction of the layer that is perpendicular 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 otherwise specified, the directions of elements as "parallel," "vertical," and "orthogonal" may include an error within a range that does not impair the effect of the present invention, for example, within a range of ±3°, ±2°, or ±1°.

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 the film or layer is heated for 1 hour at 145° C. In detail, if the dimension of the film or layer in a certain direction before heating is L _B and the dimension after heating for 1 hour at 145° C. is L _A , the thermal dimensional change rate of the film or layer in that direction is calculated by the following formula (I).
Thermal dimensional change rate (%) = [(L _B - L _A ) / L _B ] × 100 (I)
A positive sign of the thermal dimensional change rate indicates that the film or layer shrinks in that direction upon heating, and a negative sign of the thermal dimensional change rate indicates that the film or layer expands in that direction upon heating.

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

In the following description, the machine direction for films, layers, and laminates typically coincides with the longitudinal direction of a long film.

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

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

[1. Overview of optical laminate]
An optical laminate according to one embodiment of the present invention includes a resin layer (A) that is a layer containing a resin (a1) that contains a polymer having crystallinity, and a laminate (M), and is long.
The laminate (M) is composed of an adhesive layer (B) which is a layer of adhesive, and a resin layer (C) which is a layer of resin (c1).
The laminate (M) is disposed such that the adhesive layer (B) is disposed 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 disposed 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) included 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 to be satisfied by the optical laminate)
The optical laminate of this 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 thermal dimensional change rate in the longitudinal direction of the laminate (M), and TDbc represents the thermal dimensional change rate in the width direction of the laminate (M).
|MDbc| is preferably 0.09% or less, and more preferably 0.08% or less.
|TDbc| is preferably 0.098% or less, and more preferably 0.095% or less.

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

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

When the optical laminate satisfies all of the above conditions (1) to (3), the amount of curling of the optical laminate when placed at high temperatures can be reduced. In addition, the occurrence of wrinkles in the optical laminate during processing at high temperatures can be suppressed. Therefore, it is expected that processing of the optical laminate at high temperatures, such as patterning a conductive layer on the surface of the optical laminate, can be performed with high precision.

Furthermore, 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 thermal dimensional change of the resin layer (A) in the longitudinal direction, and TDa represents the rate of thermal dimensional change of the resin layer (A) in the width direction.
The optical laminate according to this embodiment can reduce the amount of curl of the optical laminate when placed under high temperatures, even if the resin layer (A) contained therein has a thermal dimensional change rate of more than 0.15%.
MDa is preferably 0.18% or more, more preferably 0.2% or more, and is preferably 0.9% or less, more preferably 0.8% or less.
TDa is preferably 0.18% or more, more preferably 0.2% or more, and is preferably 0.9% or less, 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 showing a schematic of an optical laminate according to a first embodiment of the present invention. The optical laminate 100 includes a resin layer 10 as a resin layer (A) and a laminate 40 as a laminate (M). The laminate 40 includes 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 laminate 40 is disposed 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 tc. The thickness ta and the thickness tc satisfy the condition (3).

In this embodiment, the resin layer 10 as the resin layer (A) has a single layer structure, but in another embodiment, as described below, it may have a multi-layer structure. 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. The components of the optical laminate 100 according to this embodiment will be described below.

[2.1. Resin layer (A)]
The resin layer (A) is a layer containing a resin (a1) containing a polymer having crystallinity. Hereinafter, the term "resin (a1) containing a polymer having crystallinity" will be referred to as "crystalline resin (a1)". "It is also called.
A polymer having crystallinity refers to a polymer having a melting point Tm. The term "having a melting point Tm" means that the melting point can be observed by a differential scanning calorimeter (DSC). In the following description, "crystalline The polymer having the formula "Crystalline Polymer" is also called a "crystalline polymer".

Examples of the crystalline polymer contained in the crystalline resin (a1) include polymers containing an alicyclic structure in the molecule that have crystallinity, and polystyrene-based polymers that have crystallinity (see JP 2011-118137 A). Hereinafter, polymers that contain an alicyclic structure in the molecule are also referred to as alicyclic structure-containing polymers. Among these, alicyclic structure-containing polymers that have crystallinity are preferred because they have excellent 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 hydrogenated product thereof. The alicyclic structure-containing polymer may be used alone or in combination of two or more types in any ratio.

Examples of the alicyclic structure contained in the alicyclic structure-containing polymer include a cycloalkane structure and a cycloalkene structure. Among these, a cycloalkane structure is preferred 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, and preferably 30 or less, more preferably 20 or less, and particularly preferably 15 or less. 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 structural units is preferably 30% by weight or more, more preferably 50% by weight or more, and particularly preferably 70% by weight or more. By increasing the ratio of the structural units having an alicyclic structure in the alicyclic structure-containing polymer as described above, the heat resistance can be improved.
In the alicyclic structure-containing polymer, the remainder other than the structural unit having an alicyclic structure is not particularly limited and can be appropriately selected depending on the intended use.

Examples of the alicyclic structure-containing polymer having crystallinity include the following polymer (α) to polymer (δ). Among these, the polymer (β) is preferred as the alicyclic structure-containing polymer having crystallinity because it is easy to obtain a resin layer (A) having excellent heat resistance.
Polymer (α): A ring-opening polymer of a cyclic olefin monomer, which has crystallinity.
Polymer (β): A hydrogenated product of polymer (α) and has crystallinity.
Polymer (γ): An addition polymer of a cyclic olefin monomer, which has crystallinity.
Polymer (δ): A hydride of polymer (γ) or the like, which has crystallinity.

Specifically, the alicyclic structure-containing polymer is preferably a crystalline ring-opening polymer of dicyclopentadiene, and more preferably a crystalline hydrogenated product of a ring-opening polymer of dicyclopentadiene, and particularly preferably a crystalline hydrogenated product of a ring-opening polymer of dicyclopentadiene. Here, the ring-opening polymer of dicyclopentadiene refers to a polymer in which the ratio of structural units derived from dicyclopentadiene to all structural units is usually 50% by weight or more, preferably 70% by weight or more, more preferably 90% by weight or more, and even more preferably 100% by weight.
The hydrogenated ring-opening polymer of dicyclopentadiene preferably has a high ratio of racemo dyads. Specifically, the ratio of racemo dyads in the repeating units of the hydrogenated ring-opening polymer of dicyclopentadiene is preferably 51% or more, more preferably 70% or more, and particularly preferably 85% or more. A high ratio of racemo dyads indicates high syndiotactic stereoregularity. Therefore, the higher the ratio of racemo dyads, the higher the melting point of the hydrogenated ring-opening polymer of dicyclopentadiene tends to be.
The ratio of the racemo dyads can be determined based on the ¹³ C-NMR spectrum analysis described in the Examples below.

As the alicyclic structure-containing polymer having the above-mentioned crystallinity, a polymer obtained by the manufacturing method disclosed in WO 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 a crystalline polymer having such a melting point Tm, a resin layer (A) having an even better balance between moldability and heat resistance can be obtained.

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

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

The weight average molecular weight (Mw) of the crystalline polymer is preferably 1,000 or more, more preferably 2,000 or more, and preferably 1,000,000 or less, more preferably 500,000 or less. A crystalline polymer having such a weight average molecular weight has an excellent balance between moldability 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, and is preferably 4.0 or less, more preferably 3.5 or less. Here, Mn represents the number average molecular weight. A crystalline polymer having such a molecular weight distribution has excellent moldability.
The weight average molecular weight (Mw) and molecular weight distribution (Mw/Mn) of the crystalline polymer can be measured in terms of polystyrene 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 making the proportion of the crystalline polymer equal to or greater than the lower limit of the above range, the heat resistance of the resin layer (A) can be effectively improved. The upper limit of the proportion of the crystalline polymer can be 100% by weight or less.

The crystalline polymer contained in the crystalline resin (a1) may not 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 has a high degree of crystallinity. The specific range of the degree of crystallinity can be appropriately selected depending on the desired performance, but is preferably 10% or more, more preferably 15% or more, and even more preferably 30% or more. By making the degree of crystallinity of the crystalline polymer contained in the resin layer (A) equal to or greater than the lower limit of the above range, it is possible to impart high heat resistance and chemical resistance to the resin layer (A). The degree of crystallinity of the crystalline polymer contained in the resin layer (A) can be measured, for example, by a density method.

The crystalline resin (a1) may contain optional components in addition to the crystalline polymer. Examples of optional components include antioxidants, light stabilizers, waxes, nucleating agents, fluorescent brighteners, ultraviolet absorbers, inorganic fillers, colorants, flame retardants, flame retardant assistants, antistatic agents, plasticizers, near infrared absorbers, lubricants, fillers, and any polymer other than the crystalline polymer. In addition, the optional components may be used alone or in combination of two or more types in any ratio.

The thickness ta of the resin layer (A) may be any value within the range that satisfies the above condition (3), but is preferably 5 μm or more, more preferably 10 μm or more, and is preferably 80 μm or less, more preferably 70 μm or less.

The retardation of the resin layer (A) can be set arbitrarily depending on the application 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 is 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 can be suitably used as a member that preferably has optical isotropy, such as a substrate for a touch panel.

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

As the adhesive, a commercially available product can be used. In addition, various adhesive layers are commercially available as films having adhesive properties, and these 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, for example, in the range of 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 a resin (c1) and is formed from the resin (c1). The resin (c1) is preferably a thermoplastic resin.

Resin (c1) typically contains a polymer, and may further contain optional components as long as they do not significantly impair the effects of the present invention. Examples of optional components that may be contained in resin (c1) include the same components as the examples of optional components that may be contained in resin (a1).

Resin (c1) may contain one type of polymer alone, or may contain two or more types in any combination in any ratio. The proportion of the polymer in resin (c1) is preferably 70% by weight or more, more preferably 80% by weight or more, and even more preferably 85% by weight or more, based on resin (c1) being 100% by weight, and is usually 100% by weight or less, and may be 100% by weight.

Examples of polymers that may be included in resin (c1) include alicyclic structure-containing polymers; styrene-based polymers (e.g., homopolymers of styrene or styrene derivatives or copolymers with other monomers that can polymerize therewith); cellulose-based polymers such as triacyl cellulose; polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyarylene sulfides such as polyphenylene sulfide; polyvinyl alcohol; polycarbonate; polyarylate; polyethersulfone; polysulfone; polyarylsulfone; polyvinyl chloride; acrylic polymers such as polymethyl methacrylate and polyacrylonitrile; polyimide; and polyamide. These polymers may be homopolymers or copolymers.

Among these, alicyclic structure-containing polymers are preferred because they have excellent mechanical strength, heat resistance, and moldability. Therefore, resin (c1) preferably contains an alicyclic structure-containing polymer.

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

The glass transition temperature Tgc of the resin (c1) is preferably 150° C. or higher, more preferably 155° C. or higher, and is preferably 180° C. or lower, more preferably 170° C. or lower.
When the glass transition temperature Tgc of the resin (c1) is equal to or higher than the lower limit, the heat resistance of the optical laminate can be effectively improved. When the glass transition temperature Tgc is equal to or lower than the upper limit, the moldability can be improved.

The surface of the resin layer (C) may be subjected to a surface treatment such as a corona treatment or a 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 that illustrates an optical laminate according to a second embodiment of the present invention.
The optical laminate 200 includes a resin layer 210 as the resin layer (A) and a laminate 240 as the laminate (M). The resin layer 210 as the resin layer (A) has a multi-layer structure, and includes a resin layer 211 as the resin layer (A1), a resin layer 212 as the resin layer (A2), and a resin layer 213 as the resin layer (A3). 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). The resin layer 213 as the resin layer (A3) is directly provided on the second surface 212D of the resin layer 212. The laminate 240 as the laminate (M) is composed of an adhesive layer 220 as the adhesive layer (B) and a resin layer 230 as the resin layer (C). The resin layer 213 is directly provided on the adhesive layer 220 provided in the laminate 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 such that the laminate 240 is in contact with the second surface 210D of the resin layer 210. The adhesive layer 220 is disposed between the resin layer 230 and the resin layer 213 provided 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. In this embodiment, the thickness ta of the resin layer 210 as the resin layer (A) is the total thickness of the resin layer 211, the resin layer 212, and the resin layer 213. The resin layer 230 has a thickness tc. The thickness ta and the thickness tc satisfy the above condition (3).

The second embodiment has the same configuration as the first embodiment, except that the resin layer (A) is provided with a resin layer 210 instead of the resin layer 10. The adhesive layer 220 as the adhesive layer (B) has the same configuration as the adhesive layer 20, and the resin layer 230 as the resin layer (C) has the same configuration as the resin layer 30, so their explanations are omitted. The resin layer (A) provided in the optical laminate of this embodiment will be further explained below.

The resin layer (A) in this 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 (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 formed from the resin (a1). A3) may be a resin different from the resin (a1) forming the resin layer (A), but from the viewpoint of reducing the curl amount of the resin layer (A) and facilitating the setting of lamination conditions for the resin layer (A), Therefore, it is preferable that the resins are the same. Examples and preferred examples of the resin (a1) capable of forming the resin layer (A1) and the resin layer (A3) are the same as those of the resin (a1) described in the first embodiment. Examples and preferred examples are similar.

The ratio (ta1/ta3) of the thickness ta1 of the resin layer (A1) to the thickness ta3 of the resin layer (A3) can be, for example, in the range of 0.5/1 to 1.5/1, preferably in the range of 0.7/1 to 1.3/1, from the viewpoint of reducing the amount of curling of the resin layer (A).

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

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

The resin (a2) may contain one type of ultraviolet absorbent alone, or may contain two or more types in any combination in any ratio.
The amount of the ultraviolet absorbent in the resin (a2) is preferably 2% by weight or more, more preferably 5% by weight or more, and preferably 20% by weight or less, more preferably 15% by weight or less, based on the amount of the resin (a1) contained in the resin (a2) being 100% by weight. By having the amount of the ultraviolet absorbent be equal to or more than the lower limit, ultraviolet absorbing properties can be effectively imparted to the resin layer (A2). By having the amount of the ultraviolet absorbent be equal to or less than the upper limit, bleeding out of the ultraviolet absorbent from the resin layer (A2) can be reduced.

[4. Optical laminate including conductive layer (E)]
The optical laminate according to one 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 electrical conductivity. The optical laminate may include two conductive layers (E), and the conductive layer (E) may be directly provided on each of the first and second surfaces of the resin layer (A), or the optical laminate may include only one conductive layer (E), and the conductive layer (E) may be directly provided on only one surface (the first surface or the second surface) of the resin layer (A). Here, the second surface of the resin layer (A) is the surface that faces the main surface of the resin layer (C) via the adhesive layer (B).
The optical laminate of this embodiment curls less when exposed to high temperatures, and it is therefore expected that the optical laminate of this embodiment can be processed with high precision at high temperatures.

[4.1. Third embodiment]
The optical laminate according to the third embodiment of the present invention includes a resin layer (A) and a laminate (M), and further includes a conductive layer (E). FIG. 3 is a cross-sectional view showing a schematic diagram of the optical laminate according to the third embodiment of the present invention. The optical laminate 300 includes a resin layer 310 as the resin layer (A), a laminate 340 as the laminate (M), and a conductive layer 350 as the conductive layer (E). The laminate 340 includes an adhesive layer 320 as the adhesive layer (B) and a resin layer 330 as the 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. The adhesive layer 320 included in the laminate 340 is disposed 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, and the resin layer 330 has a thickness tc.
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 provided directly on the first surface 310U of the resin layer 310. The resin layer 310, the adhesive layer 320, and the resin layer 330 have the same configuration as the resin layer 10, the adhesive layer 20, and the resin layer 30, respectively, and therefore their explanations are omitted and only the conductive layer will be explained below.

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

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 alkali-soluble resins include resins having functional groups such as hydroxyl groups and carboxyl groups. Specific examples include novolac resins having phenolic hydroxyl groups, polymers of monomers having hydroxyl groups, and copolymers of monomers having hydroxyl groups and monomers that can copolymerize with them.

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

The photosensitive composition may be, for example, a composition whose solubility in a developer decreases when irradiated with light, or a composition whose solubility in a developer increases when irradiated with light.

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

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 layer by photolithography using a conductive photosensitive composition; and a method of forming the layer by a printing method such as screen printing, gravure printing, or inkjet printing using a conductive ink.

[4.2. Modification of the third embodiment]
In another embodiment, the optical laminate may include a resin layer 210 containing an ultraviolet absorber as the resin layer (A) instead of the resin layer 310. This makes it possible to reduce the influence on the conductive layer (E) formed on the first surface of the resin layer (A) when the laminate (M) is peeled off from the optical laminate and then a conductive layer (E) is further formed on the second surface of the resin layer (A) by a method including ultraviolet irradiation.

[4.3. Fourth embodiment]
The optical laminate according to the fourth embodiment of the present invention includes a resin layer (A) and a laminate (M), and further includes a conductive layer (E). FIG. 4 is a cross-sectional view showing a schematic diagram of an optical laminate according to the fourth embodiment of the present invention. The optical laminate 400 includes a resin layer 410 as the resin layer (A), a conductive layer 450 as the conductive layer (E), and a laminate 440 as the laminate (M) in this order. The resin layer 410 has a first surface 410U and a second surface 410D. The conductive layer 450 is provided directly on the second surface 410D of the resin layer 410. The laminate 440 is composed of an adhesive layer 420 as the adhesive layer (B) and a resin layer 430 as the resin layer (C). The adhesive layer 420 is provided directly on the resin layer 430. The laminate 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 disposed between the resin layer 430 and the resin layer 410 .
The resin layer 410 has a thickness ta, and the resin layer 430 has a thickness tc.
The optical laminate 400 satisfies the above conditions (1) to (3).
The optical laminate 400 curls little when exposed to high temperatures, and it is therefore expected that the optical laminate 400 can be processed with high precision even at high temperatures.
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, respectively, and therefore descriptions thereof will be omitted. In addition, the conductive layer 450 has the same configuration as the conductive layer 350, and therefore descriptions thereof will be omitted.

[4.4. Modification of the fourth embodiment]
In another embodiment, the optical laminate may include a resin layer 210 containing an ultraviolet absorber as the resin layer (A) instead of the resin layer 410. This makes it possible to reduce the influence on the conductive layer (E) formed on the second surface of the resin layer (A) when the laminate (M) is peeled off from the optical laminate and then a conductive layer (E) is further formed on the first surface of the resin layer (A) by a method including ultraviolet irradiation.

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

[5.1. Process (1)]
In step (1), a long resin layer (C) is prepared. Step (1) is usually carried out before step (2). Step (1) is carried out simultaneously with step (3). Good too.
A commercially available product may be used as the resin layer (C). Alternatively, the resin (c1) may be melt-extruded into a film and cooled by a cooling device such as a cooling drum to produce a long resin layer (C The thickness of the resin layer (C) can be adjusted by adjusting the amount of the molten resin (c1) extruded, the film take-up speed, and the like.
The step (1) may include a step of subjecting the resin layer (C) to a surface treatment such as a corona treatment or a plasma treatment.

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

Any method can be used to form the adhesive layer (B) on one side of the resin layer (C), depending on the type of adhesive used to form the adhesive layer (B).

Step (2) may include step (2a) of applying the adhesive to one surface of the resin layer (C). Any method may be used for application. Examples of application methods include wire bar coating, spraying, roll coating, gravure coating, die coating, curtain coating, slide coating, and extrusion coating.

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

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

The step (3) may include, in this order, a step (3a) of melt-extruding a composition containing the resin (a1) and cooling it to obtain a long extruded film, and a step (3b) of heating the extruded film.
The melt extrusion in step (3a) may be a co-extrusion of a plurality of resins. For example, the resin (a1) and the resin (a2) may be melt-extruded together to obtain an extruded film having a layer structure of (a layer of resin (a1))/(a layer of resin (a2))/(a layer of resin (a1)).

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 amount of the composition extruded in the melt extrusion, the take-up speed of the extruded film, etc.

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 the steps including the following steps (3e1), (3e2), (3b), and (3c).
Step (3e1): A step of preheating the extruded film; Step (3e2): A step of stretching the preheated extruded film; Step (3b): A step of heating the extruded film; Step (3c): A step of cooling the heated extruded film to obtain the resin layer (A).

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

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

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

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

It is preferable that 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) satisfy the following relationship.
T1 < T2 < T3

[5.4. Process (4)]
In step (4), the laminate (M) and the resin layer (A) are laminated to obtain a long optical laminate.
Step (4) is usually carried out after steps (1) to (3). The lamination is carried out by providing an adhesive layer ( B) is placed.
The lamination may be performed by a so-called roll-to-roll method. The lamination may be performed by pressing the laminate (M) and the resin layer (A) with a nip roll or the like. Heat may be applied during the lamination. .

5.5. Optional steps
The method for producing the optical laminate of this embodiment may further include any step in addition to the steps (1) to (4). Examples of such any 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 a step of winding the optical laminate to obtain a roll of the optical laminate.

[6. Uses of optical laminate]
The optical laminate can be used as a component of any optical device. The optical laminate has a small curl when placed under high temperature. Therefore, the optical laminate can be suitably used as a substrate for manufacturing optical elements (e.g., conductive layers included in touch panels) whose formation process is carried out under high temperature.

The present invention will be specifically described below with reference to examples. However, the present invention is not limited to the examples shown below, and may be modified as desired without departing from the scope of the claims of the present invention and the scope of equivalents thereto.

In the following explanation, the percentages and parts are by weight unless otherwise specified. Furthermore, the operations described below were carried out at room temperature and pressure unless otherwise specified.

[Evaluation method]
(Method of measuring weight average molecular weight Mw and number average molecular weight Mn of polymer)
The weight average molecular weight Mw and 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). In the measurement, an H-type column (manufactured by Tosoh Corporation) was used as the column, and tetrahydrofuran was used as the solvent. The temperature during the measurement was 40°C.

(Method of measuring 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.

(Method of measuring glass transition temperature Tg and melting point Tm)
The glass transition temperature Tg and melting point Tm of the polymer were measured as follows. First, the polymer was melted by heating, and the melted polymer was quenched with dry ice. Then, the glass transition temperature Tg and melting point Tm of the polymer were measured using a differential scanning calorimeter (DSC) at a heating rate of 10° C./min (heating mode) using the polymer as a test specimen.

(Method for measuring the ratio of racemo-dyads in polymers)
The ratio of the racemo dyad in the polymer was measured as follows. The polymer was subjected to ¹³ C-NMR measurement by applying the inverse-gated decoupling method at 200°C using orthodichlorobenzene- _d4 as a solvent. In the results of this ¹³ C-NMR measurement, a signal at 43.35 ppm derived from the meso dyad and a signal at 43.43 ppm derived from the racemo dyad were identified, with the peak at 127.5 ppm of orthodichlorobenzene- _d4 as the reference shift. The ratio of the racemo dyad in the polymer was calculated based on the intensity ratio of these signals.

(Method for measuring thermal dimensional change rate of film)
The film was cut into a square of 150 mm x 150 mm in an environment of 23°C (room temperature) to prepare a sample film. Each side of the square was aligned along the film transport direction (i.e., the longitudinal direction of the long film) or the width direction. The 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.

The thermal dimensional change rate of the sample film was calculated based on the measured lengths of each of the four sides according to the following formula (I): In formula (I), L _B represents the length of a side of the sample film before heating, L _B was 150 mm in this measurement, and L _A represents the length of a side of the sample film after heating.
Thermal dimensional change rate (%) = [(L _B - L _A ) / L _B ] × 100 (I)
A positive sign for the rate of thermal dimensional change indicates that the film shrinks when heated, whereas a negative sign for the rate of thermal dimensional change indicates that the film expands when heated.

The average of the thermal dimensional change rates of the two sides along the film's transport direction (i.e., the longitudinal direction of the long film) was used as the thermal dimensional change rate in the film's transport direction (MD), i.e., the thermal dimensional change rate in the longitudinal direction of the long film. The average of the thermal dimensional change rates of the two sides along the film's width direction was used as the thermal dimensional change rate in the width direction (TD) of the long film.

(Method of measuring film thickness)
The thickness of the film was measured using a contact thickness meter (manufactured by MITUTOYO Corporation, Code No. 543-390).

(Method of measuring film crystallinity)
The density of the sample film was measured using a helium gas replacement type dry automatic density meter "AccuPyc 1340" (manufactured by Micromeritics). Approximately 3 g of the sample film was cut into strips with a width of 30 mm or less, rolled up, and placed in a 10 ^cm3 container, which was maintained at 25°C and measured. The density was determined from 10 repeated measurements.

The crystallinity x (%) was calculated according to the following formula:
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 represents the completely amorphous density (g/cm ³ ) of the polymer forming the sample film. Db represents the completely crystalline density (g/cm ³ ) of the polymer forming the sample film.

As the completely amorphous density Da, the following value was used.
The completely amorphous density Da of the hydrogenated dicyclopentadiene polymer (COP) produced in Production Example 1 is 1.0157 g/cm ³
Completely amorphous density Da of polyethylene terephthalate (PET) = 1.335 g / cm ³

As the perfect crystal density Dc, the following value was used.
The perfect crystal density Dc of the hydrogenated dicyclopentadiene polymer (COP) produced in Production Example 1 = 1.0857 g/cm ³
・Complete crystal density of PET Dc = 1.455 g / cm ³

(Method of measuring curl amount)
The film was cut into a square of 150 mm x 150 mm in an environment of 23°C (room temperature) to prepare a sample film. Each side of the square was aligned with the film's transport direction (i.e., the longitudinal direction of the long film) or the width direction. The sample film was heated in an oven at 145°C for 1 hour and cooled to 23°C (room temperature). The amount by which the square corners of the sample film placed on a desk rose above 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: 5mm or less Good: greater than 5mm and less than 10mm Poor: 10mm or more

(Durability of optical laminates in patterning processing using ultraviolet rays)
With reference to Example 1 of WO 2018/168325, a mesh-shaped 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.) was printed on the surface of the resin layer (A) of the optical laminate by screen printing, and then dried at 100°C for 10 minutes to obtain a laminate 1 having a layer structure of photosensitive conductive paste layer (E'1)/resin layer (A)/adhesive layer (B)/resin layer (C).
The photosensitive conductive paste layer (E'1) of the laminate 1 was irradiated with ultraviolet light from the layer (E'1) side using an exposure device through an exposure mask having a mesh pattern.
Next, the laminate was immersed in a 0.2 wt % aqueous sodium carbonate solution, then washed with ultrapure water, and dried at 145°C for 30 minutes to form a patterned conductive layer on one surface of the resin layer (A) of the optical laminate, thereby obtaining an optical laminate (D2) having a layer structure of patterned conductive layer (E1)/resin layer (A)/adhesive layer (B)/resin layer (C).

Next, the laminate (M) consisting of the adhesive layer (B) and the resin layer (C) was peeled off from the optical laminate (D2) to obtain a laminate 2 having a layer structure of a patterned conductive layer (E1)/resin layer (A).

(Formation of conductive layer (E2))
Next, the same photosensitive conductive paste as used in the preparation of laminate 1 was printed on the surface of the resin layer (A) of laminate 2 by screen printing, and dried at 100°C for 10 minutes to obtain laminate 3 having a layer structure of photosensitive conductive paste layer (E'2)/resin layer (A)/patterned conductive layer (E1).
The photosensitive conductive paste layer (E'2) of the laminate 3 was irradiated with ultraviolet light from the layer (E'2) side using an exposure device through an exposure mask having a mesh pattern.
Next, the laminate was immersed in a 0.2 wt % aqueous sodium carbonate solution, then washed with ultrapure water, and dried at 145° C. for 30 minutes to form a patterned conductive layer (E2) on the other surface of the resin layer (A) of the laminate 2, thereby obtaining a laminate 4 having a layer structure of patterned conductive layer (E1)/resin layer (A)/patterned conductive layer (E2).

In the above operations, the durability of the optical layered body (D1) in the patterning process was evaluated according to the following criteria.
A: The patterned conductive layer (E1) was formed satisfactorily without causing wrinkles in the optical laminate (D1). In addition, the patterned conductive layer (E2) was formed satisfactorily without changing the conductive layer (E1).
B: A patterned conductive layer (E1) was formed without causing wrinkles in 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), wrinkles occurred in the optical laminate (D1), 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 layered body (D1) in the patterning processing is excellent.

[Production Example 1. Production of crystalline resin (a1)]
A metallic pressure-resistant reactor was thoroughly dried and then purged with nitrogen. 154.5 parts of cyclohexane, 42.8 parts of a 70% cyclohexane solution of dicyclopentadiene (endo isomer content of 99% or more) (30 parts as the amount of dicyclopentadiene), and 1.9 parts of 1-hexene were added to the metallic pressure-resistant reactor, and the reactor was heated to 53°C.

0.014 parts of tetrachlorotungsten phenylimide (tetrahydrofuran) complex was dissolved in 0.70 parts of toluene to prepare a solution. 0.061 parts of a 19% diethylaluminum ethoxide/n-hexane solution was added to this solution and stirred for 10 minutes to prepare a catalyst solution. This catalyst solution was added to a pressure-resistant reactor to start the ring-opening polymerization reaction. The reaction was then continued for 4 hours while maintaining the temperature at 53°C to obtain a solution of a ring-opened polymer of dicyclopentadiene. The number-average molecular weight (Mn) and weight-average molecular weight (Mw) of the obtained ring-opened polymer of dicyclopentadiene were 8,750 and 28,100, respectively, and the molecular weight distribution (Mw/Mn) calculated from these was 3.21.

0.037 parts of 1,2-ethanediol was added as a terminator to 200 parts of the resulting solution of ring-opened dicyclopentadiene polymer, and the mixture was heated to 60°C and stirred for 1 hour to terminate the polymerization reaction. 1 part of a hydrotalcite-like compound (Kyowa Chemical Industry Co., Ltd.'s "Kyoward (registered trademark) 2000") was added to the mixture, which was heated to 60°C and stirred for 1 hour. 0.4 parts of a filter aid (Showa Chemical Industry Co., Ltd.'s "Radiolite (registered trademark) #1500") was then added, and the adsorbent and solution were filtered using a PP pleated cartridge filter (Advantec Toyo Co., Ltd.'s "TCP-HX").

100 parts of cyclohexane were added to 200 parts of the filtered ring-opened polymer solution (polymer amount 30 parts), and 0.0043 parts of chlorohydridocarbonyltris(triphenylphosphine)ruthenium was added, and a hydrogenation reaction was carried out at 6 MPa hydrogen pressure and 180°C for 4 hours. This produced a reaction liquid containing a hydride of the ring-opened polymer of dicyclopentadiene. The hydride precipitated from this reaction liquid, forming a slurry solution.

The hydride and the solution contained in the reaction liquid were separated using a centrifuge and dried under reduced pressure at 60°C for 24 hours to obtain 28.5 parts of a crystalline ring-opening polymer of dicyclopentadiene. 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 racemo-dyad ratio was 89%.

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

[Production Example 2. Production of resin (a2)]
A twin-screw extruder (manufactured by Toshiba Corporation, ratio L/D = 42 of screw length L to screw diameter D) with a screw having a total length of 1848 mm and a diameter of 44 mm was prepared. This screw had a total of three kneading zones at positions 685 mm, 920 mm, and 1190 mm away from the upstream end of the screw. Here, the distance from the upstream end of the screw to the position of the kneading zone refers to the distance from the upstream end of the screw to the upstream end of the kneading zone. In addition, upstream refers to the upstream in the resin flow direction. Furthermore, the ratio Lnx/D of the length Lnx of each kneading zone to the screw diameter D was Lnx/D = 4, Lnx/D = 2, and Lnx/D = 2, in that order from the upstream kneading zone.

100 parts of the crystalline resin (COP1) as resin (a1) produced in Production Example 1 above and 9 parts of a benzotriazole-based UV absorber ("LA-31" manufactured by ADEKA Corporation, molecular weight 659) were added to this twin-screw extruder and kneaded to obtain a crystalline resin (COP2) as resin (a2) in which the ratio of UV absorber to crystalline resin (COP1) was 9.0%.

[Example 1]
(1-1. Step (1): Step of obtaining resin layer (C) from resin (c1))
As the resin (c1), an amorphous resin containing an alicyclic structure-containing polymer (ZEONEX 790R, Tg = 163 ° C.; manufactured by Zeon Corporation) was prepared and molded using a hot melt extrusion film molding machine equipped with a T-die to obtain a resin film (thickness 188 μm) as a long resin layer (C) having a width of about 1350 mm. The operating conditions of the film molding machine were as follows.
・Barrel set temperature = 270℃ to 290℃
Die temperature = 270°C
Cast roll temperature = 150°C
The resin film was wound into a roll.

(1-2. Step (2): Step of obtaining laminate (M))
(1-2-1. Step (2a): Step of applying adhesive to resin layer (C))
The resin layer (C) made of the amorphous resin prepared in (1-1) was pulled out from the roll, and discharge treatment (corona treatment) was performed on one side using a corona treatment device (manufactured by Kasuga Electric Co., Ltd.) under the conditions of an output of 500 W, an electrode length of 1.35 m, and a conveying speed of 10 m/min. An acrylic adhesive ("Masstack Series" manufactured by Fujimori Kogyo Co., Ltd.) was applied as an adhesive to the surface of the resin layer (C) that had been subjected to this discharge treatment using a die coater so that the dry film thickness was 10 μm, thereby producing a coated film in which a coating layer of the adhesive was formed on one side of the resin layer (C).

(1-2-3. Step (2b): Step of drying the coating layer)
The coated film was then passed through a drying oven at 100° C. to produce a long two-layer film having a layer structure of (resin layer (C) made of amorphous resin (c1))/(adhesive layer (B)) as laminate (M). The thermal dimensional change rate of laminate (M) was measured by the method described above.

(1-3. Step (3): Step of preparing 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) with a width of approximately 1350 mm. The operating conditions of the film molding machine were as follows.
・Barrel setting temperature = 280℃ to 300℃
Die temperature = 270°C
Cast roll temperature = 80°C

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

(1-4. Step (4) of Laminating the Laminate (M) and the Resin Layer (A))
After cooling, the laminate (M) prepared in (1-2) was attached to one side of the film as the resin layer (A) by nip rolling to prepare a long optical laminate (D1) having a layer structure of resin layer (C)/adhesive layer (B)/resin layer (A). The thermal dimensional change rate of the optical laminate (D1) was measured by the above-mentioned method. The curl amount of the optical laminate (D1) was measured by the above-mentioned method. The durability of the optical laminate (D1) in patterning processing by ultraviolet light was also evaluated by the above-mentioned method.

(1-5. Step of forming conductive layer (E))
The conductive layer (E) was formed by the above-mentioned method on the exposed surface of the resin layer (A) of the optical laminate (D1) 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 for the following changes.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 for the following changes.
In (1-3-1. step (3a)), the amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film (s) was 42 μm.
In (1-3-2. step (3b)), the stretching ratio was set to 1.2 times.
In (1-1. Step (1)), the amount of resin (c1) extruded was adjusted so that the thickness of the resin layer (C) was as 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 for the following changes.
The resin layer (A) was a polyethylene terephthalate (PET) film (Cosmoshine E5100; manufactured by Toyobo Co., Ltd.) that had been annealed at 170° C. and 9.8 N using an annealing device (IN-1700; manufactured by Labo Co., Ltd.).
In (1-1. Step (1)), the amount of resin (c1) extruded 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 for the following changes.
(1-1. Step (1)) was not performed, and in (1-2. Step (2a)), a polyimide (PI) film (Kapton 500V; manufactured by Toray DuPont Co., Ltd., glass transition temperature Tg = 300°C, thickness 125 µm) was used as the resin layer (C).
In (1-3-1. step (3a)), the amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film (s) was 42 μm.
In (1-3-2. step (3b)), the stretching 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 for the following changes.
(1-1. Step (1)) was not performed, and in (1-2. Step (2a)), a polyethylene naphthalate (PEN) film (Teonex Q51; manufactured by Teijin Limited, glass transition temperature Tg = 121°C, thickness 188 µm) was used as the resin layer (C).
In the step (1-2-3. step (2b)), an annealing treatment was performed at 170° C. and 9.8 N using an annealing device (IN-1700; manufactured by Labo Co., Ltd.) to prepare a laminate (M).
In (1-3-1. step (3a)), the amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film (s) was 42 μm.
In (1-3-2. step (3b)), the stretching 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 for the following changes.
In (1-1. Step (1)), a non-crystalline 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 setting temperature = 265℃ to 285℃
Die temperature = 265°C
Cast roll temperature = 144°C
In (1-3-1. step (3a)), the amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film (s) was 42 μm.
In (1-3-2. step (3b)), the stretching 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 for the following changes.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 were carried out to obtain an extruded film (m1), and in (1-3-2. Step (3b)), the extruded film (m1) was used instead of the extruded film (s). This resulted in a resin layer (A) having a multilayer structure with a layer configuration of (resin (COP1) layer)/(resin (COP2) layer)/(resin (COP1) layer). A layer of resin (COP1) was directly formed on both sides of the layer of resin (COP2). Here, the layer of resin (COP1) corresponds to the resin layer (A1) or the resin layer (A3), and the layer of resin (COP2) corresponds to the resin layer (A2).

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

On the other hand, a single-screw extruder (screw diameter D = 50 mm, ratio of screw length L to screw diameter D L/D = 30) equipped with a leaf disk-shaped polymer filter with a mesh size of 3 μm was prepared. The crystalline resin (COP1) produced in Production Example 1 as resin (a1) was introduced into this single-screw extruder, dissolved, and fed to the single-layer die via a feed block.

After that, the crystalline resin (COP1) as resin (a1) and the crystalline resin (COP2) containing an ultraviolet absorber as resin (a2) were extruded from a single-layer die in a molten state at 260°C so as to be extruded as a film-like laminate having a layer structure of (layer of resin (a1))/(layer of resin (a2))/(layer of resin (a1)), and co-extrusion molding was performed. The extruded laminate was then cast onto a cooling roll whose temperature was adjusted to 80°C, and a long extruded film (m1) having a multilayer structure was obtained.

[Example 10]
An optical laminate (D1) and an optical laminate (D2) were obtained in the same manner as in Example 1, except for the following changes.
Instead of (1-3-1. Step (3a)), the same operation as in (Production of extruded film (m1)) of Example 9 was carried out to obtain an extruded film (m1).
In (1-3-2. Step (3b)), the extruded film (m1) was used instead of the extruded film (s). This resulted in a resin layer (A) having a multilayer structure. The layer structure of the obtained resin layer (A) was the same as that of the resin layer (A) obtained in Example 9.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 for the following changes.
Extruded film (m2) was obtained by changing the following items in Example 9 (production of extruded film (m1)).
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 stretching ratio was set to 1.2 times. This resulted in a resin layer (A) having a multilayer structure. The layer structure of the obtained resin layer (A) was the same as that of the resin layer (A) obtained in Example 9.
In (1-1. Step (1)), the amount of resin (c1) extruded was adjusted so that the thickness of the resin layer (C) was as 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 for the following changes.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 for the following changes.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film was 42 μm.
In (1-3-2. step (3b)), the stretching 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 for the following changes.
In (1-1. Step (1)), the amount of resin (c1) extruded 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 amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film was 42 μm.
In (1-3-2. step (3b)), the stretching 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 for the following changes.
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 treatment was performed at 170° C. and 9.8 N using an annealing device (IN-1700; manufactured by Labo Co., Ltd.) to prepare a laminate (M).
In (1-3-1. Step (3a)), the amount of crystalline resin (COP1) extruded was adjusted so that the thickness of the extruded film was 42 μm.
In (1-3-2. step (3b)), the stretching ratio was set to 1.2 times.

The configuration 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 resin (COP1) having a single layer structure produced from an extruded film (s); "COP1/COP2/COP1": a film having a layer structure of (layer of resin (COP1))/(layer of resin (COP2))/(layer of resin (COP1)) produced from an extruded film (m1) or an extruded film (m2); "PET (E5100)": a polyethylene terephthalate film (Cosmoshine E5100; manufactured by Toyobo Co., Ltd.);
"PET (A4100)": polyethylene terephthalate film (A4100; manufactured by Toyobo Co., Ltd.)
"PI": Polyimide film (Kapton 500V; manufactured by Toray DuPont Co., Ltd.)
"PEN": polyethylene naphthalate film (Teonex Q51; manufactured by Teijin Ltd.)
"790R": film of resin containing an alicyclic structure-containing polymer (ZEONEX 790R; manufactured by ZEON CORPORATION) "T62R": film of resin containing an alicyclic structure-containing polymer (ZEONEX T62R; manufactured by ZEON CORPORATION) "acAD": layer of acrylic adhesive ("MASTACK series" manufactured by Fujimori Kogyo Co., Ltd.) "Tgc": glass transition temperature of resin (c1) constituting resin layer (C) "MDa": thermal dimensional change rate in the conveying direction (longitudinal direction) of resin layer (A) "TDa": thermal dimensional change rate in the width direction of resin layer (A) "MDbc": thermal dimensional change rate in the conveying direction (longitudinal direction) of laminate (M) "TDbc": thermal dimensional change rate in the width direction of laminate (M) "MDd": thermal dimensional change rate in the conveying direction (longitudinal direction) of optical laminate (D1) "TDd": thermal dimensional change rate in the width direction of optical laminate (D1) "ta": thickness of resin layer (A); "tb": thickness of adhesive layer (B); "tc": thickness of resin layer (C); "Ca": crystallinity (%) of resin layer (A);
"Tm": melting point of the resin constituting the resin layer (A)

From the above results, the following can be seen:
The optical laminate (D1) according to the example, which satisfies all of the conditional expressions (1) to (3), was evaluated as having a good curl amount. In addition, no wrinkles were generated in the optical laminate (D1), and the patterned conductive layer (E1) was formed satisfactorily.
Furthermore, it can be seen that the optical laminates (D1) according to Examples 1 to 11, which satisfy conditional formula (4) in addition to conditional formulas (1) to (3), have a good evaluation of the curl amount even when they have a resin layer (A) whose MDa and TDa are greater than 0.15%.
Furthermore, it can be seen that the optical laminates (D1) according to Examples 1 to 4 and Examples 9 to 11, in which both the resin contained in the resin layer (A) and the resin forming the resin layer (C) contain an alicyclic structure-containing polymer, have the best evaluation of the curl amount.
Furthermore, it is found that the optical laminates (D1) according to Examples 9 to 11, in which the resin layer (A) has a layer structure of (layer of resin (COP1))/(layer of resin (COP2))/(layer of resin (COP1)), can form a patterned conductive layer (E1) well, and can also form a patterned conductive layer (E2) on the resin layer (A) without affecting the conductive layer (E1). Therefore, it is found that the optical laminates (D1) according to Examples 9 to 11 are particularly suitable for producing a conductive film in which a conductive layer is 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 formulas (1) to (3), was evaluated as having a poor curl amount, and wrinkles were generated in the optical laminate (D1), which indicates that a patterned conductive layer (E1) cannot be formed.

The above results show that the optical laminate of the present invention curls less when exposed to high temperatures such as 145°C. Therefore, it is expected that the optical laminate of the present invention can be processed with high precision even 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 (10)

A long optical laminate comprising a resin layer (A) containing a resin (a1) containing a polymer having crystallinity, and a laminate (M),
The laminate (M) comprises an adhesive layer (B) which is an adhesive layer, and a resin layer (C) which is a layer of a resin (c1),
the laminate (M) is disposed so that the adhesive layer (B) is disposed between the resin layer (C) and the resin layer (A);
The adhesive layer (B) is provided directly on the resin layer (C),
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 laminate (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) ,
The thickness ta of the resin layer (A) and the thickness tc of the resin layer (C) satisfy the following condition (3),
The thermal dimensional change rate MDa in the longitudinal direction and the thermal dimensional change rate TDa in the transverse direction of the resin layer (A) satisfy the following condition (4) :
A long optical laminate.
|MDbc|≦0.1% and |TDbc|≦0.1% (1)
|MDd|≦0.15% and |TDd|≦0.15% (2)
3≦tc/ta≦15 (3)
0.15%<MDa≦1% and 0.15%<TDa≦1% (4) the resin layer (A) comprises a resin layer (A1), a resin layer (A2), and a resin layer (A3),
the resin layer (A1) is provided directly on a first surface of the resin layer (A2), and the resin layer (A3) is provided directly on a second surface of the resin layer (A2);
The resin layer (A1) and the resin layer (A3) each contain the resin (a1),
The long optical laminate according to claim 1 , wherein the resin layer (A2) is made of the resin (a1) and a resin (a2) containing an ultraviolet absorber. Further comprising at least one conductive layer (E),
3. The long optical laminate according to claim 1 or 2, wherein the conductive layer (E) is provided on the first surface and the second surface of the resin layer (A), or directly on the first surface or the second surface of the resin layer (A). A long optical laminate comprising a resin layer (A) containing a resin (a1) containing a polymer having crystallinity, and a laminate (M),
the resin layer (A) comprises a resin layer (A1), a resin layer (A2), and a resin layer (A3),
the resin layer (A1) is provided directly on a first surface of the resin layer (A2), and the resin layer (A3) is provided directly on a second surface of the resin layer (A2);
The resin layer (A1) and the resin layer (A3) each contain the resin (a1),
the resin layer (A2) is made of the resin (a1) and a resin (a2) containing an ultraviolet absorber,
The laminate (M) comprises an adhesive layer (B) which is an adhesive layer, and a resin layer (C) which is a layer of a resin (c1),
the laminate (M) is disposed so that the adhesive layer (B) is disposed between the resin layer (C) and the resin layer (A);
The adhesive layer (B) is provided directly on the resin layer (C),
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 laminate (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 tc of the resin layer (C) satisfy 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≦tc/ta≦15 (3) Further comprising at least one conductive layer (E),
The long optical laminate according to claim 4, wherein the conductive layer (E) is provided on the first surface and the second surface of the resin layer (A), or directly on the first surface or the second surface of the resin layer ( A ). A resin layer (A) containing a resin (a1) containing a polymer having crystallinity, a laminate (M) , and at least one conductive layer (E).
A long optical laminate comprising:
The laminate (M) comprises an adhesive layer (B) which is an adhesive layer, and a resin layer (C) which is a layer of a resin (c1),
the laminate (M) is disposed so that the adhesive layer (B) is disposed between the resin layer (C) and the resin layer (A);
The adhesive layer (B) is provided directly on the resin layer (C),
the conductive layer (E) is provided on a first surface and a second surface of the resin layer (A), or directly on the first surface or the second surface of the resin layer (A);
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 laminate (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 tc of the resin layer (C) satisfy 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≦tc/ta≦15 (3) Further, 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). A long optical laminate according to any one of claims 4 to 6 .
0.15%<MDa≦1% and 0.15%<TDa≦1% (4) The long optical laminate according to any one of claims 1 to 7 , wherein the glass transition temperature Tgc of the resin (c1) is 150°C or higher. The long optical laminate according to any one of claims 1 to 8 , wherein the resin (a1) and the resin (c1), or the resin (a1) or the resin (c1), contain a polymer containing an alicyclic structure. A method for producing a long optical laminate comprising a resin layer (A) containing a resin (a1) containing a polymer having crystallinity, and a laminate (M), comprising:
The long optical laminate is
The laminate (M) comprises an adhesive layer (B) which is an adhesive layer, and a resin layer (C) which is a layer of a resin (c1),
the laminate (M) is disposed so that the adhesive layer (B) is disposed between the resin layer (C) and the resin layer (A);
The adhesive layer (B) is provided directly on the resin layer (C),
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 laminate (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 tc of the resin layer (C) satisfy the following condition (3):
|MDbc|≦0.1% and |TDbc|≦0.1% (1)
|MDd|≦0.15% and |TDd|≦0.15% (2)
3≦tc/ta≦15 (3) ,
The manufacturing method includes:
A step (1) of preparing a long resin layer (C);
A step (2) of forming the adhesive layer (B) on one surface of the resin layer (C) to obtain a long laminate (M) composed of the resin layer (C) and the adhesive layer (B);
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 onto one surface of the resin layer (C),
The step (3) includes a step (3a) of melt-extruding a composition containing the resin (a1) and cooling it to obtain a long extruded film, and a step (3b) of heating the extruded film.
A method for producing a long optical laminate.

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