JP2017181530A - Manufacturing method of member with functional layer and manufacturing method of member for display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a member with a functional layer capable of satisfactorily transferring a functional layer onto a member to be transferred by using a photocurable adhesive layer having a thin thickness. do. According to the present invention, a preparatory step of preparing a transfer base material and a transfer laminate having a functional layer formed on the transfer base material, and at least light on a member to be transferred having the base material. A coating step of forming a photocurable adhesive layer by applying an adhesive containing a curable resin material, and laminating the photocurable adhesive layer and the functional layer of the transfer laminate. The step, the exposure step of curing the photocurable resin material by exposing the photocurable adhesive layer and adhering the functional layer onto the transfer member, and the transfer of the transfer laminate. The above problem is solved by providing a method for manufacturing a member with a functional layer, which comprises a transfer step of transferring the functional layer onto the member to be transferred by peeling off the base material for use. .. [Selection diagram] Fig. 1

Description

  The present invention relates to a method for manufacturing a member with a functional layer and a method for manufacturing a member for a display device that form a functional layer on a member to be transferred using a transfer method.

  For example, in various fields such as the display field, the electronic element field, and the building material field, the adhesive layer composed of the pressure-sensitive adhesive (PSA) is, for example, bonding the base materials together or the base material and the functional layer. (For example, Patent Document 1). Hereinafter, an adhesive layer composed of a pressure-sensitive adhesive may be referred to as a pressure-sensitive adhesive layer.

A technique for forming a functional layer on a substrate by a transfer method using a pressure-sensitive adhesive layer has also been proposed.
FIGS. 5A to 5F are schematic process diagrams showing an example of a conventional method for producing a member with a functional layer. In the prior art, first, as shown in FIG. 5A, a protective substrate 6 such as a release paper and an adhesive layer (pressure-sensitive adhesive layer) 7 including a pressure-sensitive adhesive formed on the protective substrate 6 are provided. A transfer laminate 8 is prepared. Next, as shown in FIG. 5B, after the pressure-sensitive adhesive layer 7 of the transfer laminate 8 is pressure-bonded on the member to be transferred 4, the protective substrate is formed as shown in FIG. 5C. By peeling 6, the pressure-sensitive adhesive layer 7 is transferred onto the member 4 to be transferred. Next, as shown in FIG. 5 (d), a transfer member 1 having a transfer substrate 2 and a functional layer 3a is prepared. As shown in FIG. 5 (e), the pressure-sensitive adhesive layer 7 and the functional layer 3a are prepared. Crimp with the facing. Next, as shown in FIG. 5 (f), the functional layer 3 a is transferred onto the transferred member 4 by peeling the transfer substrate 2. The functional layer-equipped member 10B is manufactured through the above steps.

JP, 2015-191635, A

  The adhesive layer composed of the pressure-sensitive adhesive is formed on the member to be transferred by, for example, forming a pressure-sensitive adhesive layer on a protective substrate and then transferring it. For this reason, the pressure-sensitive adhesive layer needs to be relatively thick in order to impart strength sufficient to withstand transfer. Therefore, in a transfer method using a pressure-sensitive adhesive layer, it may be difficult to form a thin member with a functional layer.

  The present invention has been made in view of the above circumstances, and a method for producing a member with a functional layer capable of satisfactorily transferring a functional layer onto a member to be transferred using a thin photocurable adhesive layer. The main purpose is to provide.

  In order to achieve the above object, a preparation step of preparing a transfer substrate and a transfer laminate having a functional layer formed on the transfer substrate, and at least light transferred on a transfer member having the substrate Bonding that bonds the coating step of forming a photocurable adhesive layer by applying an adhesive containing a curable resin material, the photocurable adhesive layer, and the functional layer of the transfer laminate. Exposing the photo-curing adhesive layer to cure the photo-curing resin material and adhering the functional layer onto the transfer member; and transferring the transfer laminate And a transfer step of transferring the functional layer onto the member to be transferred by peeling the base material for use.

  According to the present invention, since the photocurable adhesive layer can be formed using a coating method in the coating step, the thickness of the photocurable adhesive layer can be reduced. Further, according to the present invention, in the exposure step, the photocurable resin material can be cured by exposure and the functional layer can be adhered onto the member to be transferred, so that the thin photocurable adhesive layer is used. The transferred member and the functional layer can be favorably adhered. Therefore, the functional layer can be satisfactorily transferred onto the member to be transferred using the thin photocurable adhesive layer.

  In the said invention, it is preferable that the said to-be-transferred member has a 2nd functional layer formed on the said base material. In the present invention, since the photocurable adhesive layer can be formed using a coating method, for example, when the second functional layer is formed in a predetermined pattern on the substrate, the member to be transferred is This is because the photocurable adhesive layer can be formed to follow the surface unevenness of the transferred member even if it has surface unevenness.

  The present invention provides a preparation step for preparing a transfer laminate having a transfer substrate and a functional layer for a display device formed on the transfer substrate, and photocuring at least on a member to be transferred having the substrate. By applying an adhesive containing a mold resin material, an application step of forming a photocurable adhesive layer, the photocurable adhesive layer, and the display device functional layer of the transfer laminate are bonded. A bonding step, an exposure step of curing the photocurable resin material by exposing the photocurable adhesive layer, and adhering the functional layer for display device on the transferred member, and the transfer And a transfer step of transferring the display device functional layer onto the member to be transferred by peeling off the transfer substrate of the laminate. .

  According to the present invention, since a functional layer for a display device can be formed on a member to be transferred using a thin photo-curing adhesive layer, a thin display device member can be formed.

  The method for producing a member with a functional layer of the present invention has an effect that the functional layer can be satisfactorily transferred onto the member to be transferred using a thin photocurable adhesive layer.

It is a schematic process drawing which shows an example of the manufacturing method of the member with a functional layer of this invention. It is a schematic sectional drawing which shows an example of the photocurable adhesive layer in this invention. It is a schematic process drawing which shows the other example of the manufacturing method of the member with a functional layer of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the member for display apparatuses of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the conventional member with a functional layer. It is a schematic sectional drawing which shows an example of the conventional pressure sensitive adhesive layer.

  Hereinafter, the manufacturing method of the base material with a functional layer of this invention and the detail of the member for display apparatuses are demonstrated.

A. Hereinafter, the details of the method for producing a member with a functional layer of the present invention will be described.
The method for producing a member with a functional layer according to the present invention includes a preparation step of preparing a transfer substrate and a transfer laminate having a functional layer formed on the transfer substrate, and a transferred member having at least the substrate. A coating process for forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material thereon, the photocurable adhesive layer, and the functional layer of the transfer laminate are attached. A bonding step for combining, an exposure step for curing the photocurable resin material by exposing the photocurable adhesive layer, and adhering the functional layer on the member to be transferred, and the transfer laminate A transfer step of transferring the functional layer onto the member to be transferred by peeling off the transfer substrate of the body.

  The manufacturing method of the member with a functional layer of this invention is demonstrated referring a figure. 1A to 1E are schematic process diagrams showing an example of a method for producing a member with a functional layer of the present invention. In the present invention, first, as shown in FIG. 1A, a transfer laminate 1 having a transfer substrate 2 and a functional layer 3a formed on the transfer substrate 2 is prepared (preparation step). Next, as shown in FIG.1 (b), by apply | coating the adhesive agent containing a photocurable resin material on the base material 4a (transferred member 4) using application | coating apparatuses C, such as a die coater, for example, The photocurable adhesive layer 5 is formed (application process). Next, as shown in FIG.1 (c), the photocurable adhesive layer 5 and the functional layer 3a of the laminated body 1 for transcription | transfer are bonded (bonding process). Next, as shown in FIG. 1 (d), the exposure light L is irradiated to expose the photocurable adhesive layer 5, thereby curing the photocurable resin material and forming a functional layer on the transferred member 4. 3a is adhered (exposure process). Next, as shown in FIG. 1E, the functional layer 3a is transferred onto the transfer target member 4 by peeling off the transfer substrate 2 of the transfer laminate 1 (transfer process). The functional layer-equipped member 10A can be manufactured through the above steps.

  According to the present invention, since the photocurable adhesive layer can be formed using a coating method in the coating step, the thickness of the photocurable adhesive layer can be reduced. Further, according to the present invention, in the exposure step, the photocurable resin material can be cured by exposure and the functional layer can be adhered onto the member to be transferred, so that the thin photocurable adhesive layer is used. The transferred member and the functional layer can be favorably adhered. Therefore, the functional layer can be satisfactorily transferred onto the member to be transferred using the thin photocurable adhesive layer.

Here, conventionally, in the transfer method, a pressure-sensitive adhesive layer is usually used. When forming a pressure-sensitive adhesive layer on a member to be transferred, a transfer laminate for a pressure-sensitive adhesive layer in which a pressure-sensitive adhesive layer is formed on a protective substrate is prepared in advance. After the pressure-sensitive adhesive layer side is pressure-bonded onto the member to be transferred, the protective substrate is peeled off. That is, the pressure-sensitive adhesive layer is formed on the transferred member by transferring itself. Therefore, it is necessary to give the pressure-sensitive adhesive layer strength sufficient to withstand pressure bonding on the transfer member and peeling of the protective substrate, and it is necessary to make the thickness relatively thick. Therefore, in the transfer method using the pressure-sensitive adhesive layer, it is difficult to form a thin member with a functional layer.
On the other hand, according to the present invention, since the functional layer can be transferred onto the member to be transferred using a thin photocurable adhesive layer, the thickness of the member with the functional layer can be reduced. .

Moreover, the pressure-sensitive adhesive layer has a relatively low fluidity. Therefore, for example, as shown in FIG. 6, when the member to be transferred 4 has surface irregularities such as having the second functional layer 3 b on the substrate 4 a, the member 4 is formed on the member to be transferred 4. In the pressure-sensitive adhesive layer 7, there may be a step in the surface unevenness of the member to be transferred as it is. That is, in some cases, the bonding surface of the pressure-sensitive adhesive layer 7 with the transfer laminate cannot be flattened. Therefore, it may be difficult to bond the pressure-sensitive adhesive layer and the transfer laminate well. Further, when the transferred member 4 has surface irregularities, the area of the portion where the pressure-sensitive adhesive layer 7 and the transferred member 4 are not in close contact may increase. Therefore, there is a concern that the performance of the obtained member with a functional layer is deteriorated or the functional layer is peeled off. Such a problem is particularly likely to occur, for example, when a second functional layer having a fine pattern is formed on a member to be transferred. In addition, since the pressure-sensitive adhesive layer is formed on the transferred member using the transfer laminate, for example, even when the fluidity of the pressure-sensitive adhesive layer is increased, the protective substrate becomes uneven on the surface of the transferred member. Since it cannot follow, there is a concern that it becomes difficult to form the pressure-sensitive adhesive layer by following the surface irregularities of the transferred member. Such a problem is likely to occur particularly when the pressure-sensitive adhesive layer is formed thin.
In contrast, according to the present invention, the fluidity of the adhesive containing the photocurable resin material can be adjusted, and the photocurable adhesive layer can be formed using a coating method. The photocurable adhesive layer can be made to follow the unevenness satisfactorily and formed. Moreover, according to this invention, the surface unevenness | corrugation of a to-be-transferred member can be filled with a photocurable adhesive layer by adjusting the application quantity of the said adhesive agent. Therefore, flatness can be given to the bonding surface with the functional layer in the photocurable adhesive layer, and the functional layer and the photocurable adhesive layer can be bonded satisfactorily.

Further, the pressure-sensitive adhesive layer is easily deteriorated by heating. Therefore, a member with a functional layer using a pressure-sensitive adhesive layer has a problem that it is difficult to perform a post-process that requires heat treatment after the transfer of the functional layer, for example. On the other hand, since the member with a functional layer obtained in the present invention has a photocurable adhesive layer obtained by curing a photocurable resin material, it can have high heat resistance. Therefore, after the transfer of the functional layer, a post process that requires heat treatment can be performed. Therefore, the manufacturing method of the member with a functional layer of this invention can be applied to formation of a wide functional layer compared with the conventional transfer method using a pressure sensitive adhesive layer.
Hereinafter, each process in the manufacturing method of the member with a functional layer of this invention is demonstrated.

1. Preparation Step The preparation step in the present invention is a step of preparing a transfer laminate having a transfer substrate and a functional layer formed on the transfer substrate.

(1) Transfer Laminate The transfer laminate in the present invention has a transfer substrate and a functional layer.
In the present invention, in the exposure step described later, exposure light is usually applied to the photocurable adhesive layer from at least one of the transfer laminate side and the transferred member side. Therefore, at least one of the transfer laminate and the member to be transferred has optical transparency to exposure light. Here, the light transmittance with respect to the exposure light means that the exposure light is transmitted to such an extent that the photo-curable resin material can be cured. Specifically, the light transmittance of the exposure light is 60% or more. Of these, 70% or more is preferable. Further, at least one of the transfer laminate and the member to be transferred preferably has, for example, a total light transmittance of 60% or more, particularly 70% or more. In addition, the light transmittance of the exposure light of the laminate for transfer and the member to be transferred can be measured using a spectrophotometer. Moreover, the total light transmittance of the transfer laminate and the member to be transferred can be measured by, for example, a fully automatic direct reading haze computer (HGM-2DP) manufactured by Suga Test Instruments Co., Ltd.

  In the present invention, the transfer laminate may have the above-described exposure light transmittance and total light transmittance. When the transfer laminate has the light transmittance and the total light transmittance of the exposure light, it is possible to use a member having no light transmittance as a member to be transferred. Formation is possible.

(A) Functional layer The functional layer in the present invention is a layer formed on a transfer substrate. The functional layer is a layer that is transferred onto the member to be transferred, and is a layer that imparts some function to the member to be transferred.

  As the function of the functional layer, for example, optical (light selective absorption, reflectivity, polarization, light selective transmission, nonlinear optical property, luminescence such as fluorescence or phosphorescence, photochromic property, etc.), magnetic (hard magnetism, Soft magnetic, non-magnetic, magnetic permeability, etc., electrical / electronic (conductive, insulating, piezoelectric, pyroelectric, dielectric, etc.), chemical (adsorptive, desorbable, catalytic, water absorbing, ion) Conductivity, redox properties, electrochemical properties, electrochromic properties, etc.), mechanical properties (wear resistance, etc.), thermal properties (thermal conductivity, heat insulation properties, infrared radiation properties, etc.), biofunctional properties (biocompatibility, antithrombotic properties) Various functions).

  The functional layer may have light transmittance with respect to exposure light or may not have light transmittance. The thickness of the functional layer is not particularly limited as long as it can be transferred onto the member to be transferred, and can be appropriately selected according to the type of the functional layer.

  The functional layer formed on the transfer substrate may be a single layer or two or more functional layers. Two or more types of functional layers may be formed by being laminated, or may not be laminated and may be formed on the same plane. In the case where two or more functional layers are laminated and formed, a photocurable adhesive layer may be formed between the functional layers. That is, the functional layer in the present invention may be manufactured by the manufacturing method of the present invention.

  The functional layer may be formed on the entire area of the transfer substrate or may be formed in a predetermined pattern.

  Examples of the functional layer include a light shielding layer, a colored layer, a decorative layer, a low reflection layer, a barrier layer, an insulating layer, a wiring used for a circuit board, a barrier layer used for a packaging material, and a heat insulating layer. , Decorative layer used for moisture absorbing layer, building material, heat insulating layer, wear resistant layer, low reflective layer, water absorbing layer, decorative layer used for transport equipment such as automobile, heat insulating layer, low reflective layer, infrared blocking layer Etc. The functional layer may further include a support base material for supporting the functional layer.

  As a functional layer, it is preferable that it is a functional layer for display apparatuses used for the member for display apparatuses, for example. This is because the display device member can be manufactured thin. The details of the functional layer for display device will be described in the section “B. Method for manufacturing member for display device” described later.

(B) Transfer Substrate The transfer substrate in the present invention is a member that supports the functional layer.
The substrate for transfer may or may not have light transmittance for exposure light. When the functional layer has light transmittance with respect to exposure light, a substrate having light transmittance with respect to exposure light is usually used as the transfer substrate.

  The substrate for transfer may have flexibility or may not have flexibility, but more preferably has flexibility. This is because when the transfer base material has flexibility, the functional layer can be easily bonded by following the transfer laminate in accordance with the form of the member to be transferred. Moreover, it is because it is easy to peel off the transcription | transfer base material in the peeling process mentioned later. The flexibility of the transfer substrate may be, for example, as long as it does not impair the function of the functional layer on the transfer substrate. With the functional layer described in “6. It is preferable to show the same degree of flexibility as the flexibility of the member.

Examples of the transfer substrate include a glass substrate and a resin substrate. In the present invention, a resin base material is particularly preferable. Moreover, as a resin base material, it is preferable that it is a resin film base material.
The thickness of the transfer substrate is not particularly limited as long as the functional layer can be formed and the functional layer can be bonded onto the member to be transferred. The thickness of the transfer substrate is, for example, preferably in the range of 3 μm to 500 μm, more preferably in the range of 5 μm to 400 μm, and particularly preferably in the range of 10 μm to 300 μm.
As a form of the base material for transfer, the form wound in roll shape may be sufficient, and the form (sheet | seat base material) which has a magnitude | size corresponding to the form of a member with a functional layer may be sufficient.

  The adhesion between the transfer substrate and the functional layer is not particularly limited as long as the transfer substrate can be peeled from the functional layer in the peeling step described later. In the present invention, the surface roughness of the transfer substrate (for example, the arithmetic average roughness (Ra) of JIS B0601) is adjusted in order to facilitate the peeling of the transfer substrate from the functional layer in the peeling step described later. May be.

2. Application Step The application step in the present invention is a step of forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material on at least a transferred member having a substrate. The present invention is characterized in that an adhesive is applied on the member to be transferred, and usually the adhesive is not applied on the transfer laminate. The production method of the present invention is effective, for example, when the functional layer is weak to a solvent.

(1) Photocurable adhesive layer The adhesive used for the photocurable adhesive layer will be described.
The adhesive used in the present invention contains a photocurable resin material. Examples of the photocurable resin material used for the adhesive include an ultraviolet curable resin material that can be cured by irradiating ultraviolet rays having a wavelength in the range of 100 nm to 450 nm, for example. Examples of the ultraviolet curable resin material include monofunctional monomers such as reactive ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone, polyfunctional monomers, and polymethylolpropane tri (meth). Acrylate, hexanediol (meth) acrylate, triethylene (polypropylene) glycol (meth) diacrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neo Pentyl glycol di (meth) acrylate, isocyanuric acid EO-modified diacrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, vinyl Phenol fluorene derivatives, bisphenoxyethanolfluorene (meth) acrylate, bisphenol fluorene Epo Kiki (meth) acrylate. Here, (meth) acrylate is a notation meaning acrylate or methacrylate.
In the present invention, only one type of these ultraviolet curable resin materials may be used, or two or more types may be mixed and used.

  The adhesive in the present invention may further contain a solvent, if necessary. When the adhesive contains a solvent, the fluidity of the adhesive can be increased. For example, even when the member to be transferred has fine surface irregularities, the photocurable adhesive layer is made to follow the surface irregularities. It is because it can form. In addition, when an adhesive agent has a solvent, after apply | coating an adhesive agent and forming a coating film, a coating film is dried, a solvent is removed, and a photocurable adhesive layer is formed. The viscosity of the adhesive can be appropriately selected according to the coating method, the form of the first member and the second member, and the like.

The photocurable adhesive layer usually has a predetermined tackiness before being cured.
Specifically, the photocurable adhesive layer preferably has a tack property with a ball number of 1 or more in an inclined ball tack test (inclination angle 20 °) in an environment of a temperature of 23 ° C. and a humidity of 65%. In particular, the ball number is preferably 2 or more, and the ball number is preferably 3 or more. The photocurable adhesive layer has such tackiness as described above, so that the first member and the second member can be bonded with sufficient adhesive force through the photocurable adhesive layer, and after light irradiation. The adhesion strength of can also be increased.
Here, the evaluation of the tack property by the tilting ball tack test is performed by placing the photocuring adhesive layer on the jig having a tilt angle of 20 ° according to JIS Z 0237 so that the adhesive surface is the upper surface. When a steel ball was rolled on the adhesive surface in an environment of ° C and humidity of 65%, the evaluation was made based on the largest ball number at which the steel ball stopped for 5 seconds or longer on the adhesion surface.

  The photocurable adhesive layer formed in the coating process usually has a predetermined tackiness. Here, the predetermined tackiness is preferably, for example, that the peeling strength of the ultraviolet curable adhesive layer with respect to the glass plate by the 180-degree peeling test specified in JIS K6854-2 is 10 N / 25 mm width or more. The width is preferably 15 N / 25 mm width or more, and particularly preferably 20 N / 25 mm width or more. In the present invention, the peel strength of the ultraviolet curable adhesive layer is preferably, for example, 50 N / 25 mm width or less, more preferably 45 N / 25 mm width or less, and particularly 40 N / 25 mm width or less. It is preferable that

In the present invention, by using a photocurable adhesive layer, it is possible to reduce the thickness as compared with a pressure-sensitive adhesive layer conventionally used. The thickness of the photocurable adhesive layer in the present invention is, for example, preferably 10 μm or less, more preferably 8 μm or less, and particularly preferably 6 μm or less. When the thickness of the photocurable adhesive layer in the present invention is the above upper limit, the member with a functional layer obtained by the present invention can be manufactured thinly. Moreover, it is preferable that the thickness of the photocurable adhesive layer in this invention is 0.5 micrometer or more, for example.
When the thickness of the photocurable adhesive layer in the present invention is the above lower limit, the member to be transferred and the functional layer laminated via the photocurable adhesive layer can be sufficiently adhered.
In addition, the thickness of the photocurable adhesive layer in this invention can be measured by observing a cross section using a scanning electron microscope (SEM), for example. Moreover, when the photocurable adhesive layer is formed on the functional layer having surface irregularities, it is preferable that the thickness of the photocurable adhesive layer formed on the convex portion has the above-described thickness.

The ultraviolet curable adhesive layer in the present invention may have a predetermined transparency. Specifically, the total light transmittance of the photocurable adhesive layer may be 85% or more, especially 90 % Or more is preferable.
The total light transmittance of the ultraviolet curable adhesive layer can be measured by a fully automatic direct reading haze computer (HGM-2DP) manufactured by Suga Test Instruments Co., Ltd.
When the member with a functional layer in the present invention is a member for a display device, the ultraviolet curable adhesive layer preferably has a predetermined transparency.

  The photocurable adhesive layer is formed by a coating method. As a coating method used in the present invention, a general coating method and a printing method can be used, and examples thereof include a die coating method, a screen printing method, a gravure printing method, and an offset printing method.

  As will be described later, when the member to be transferred has a base material and a second functional layer, the photocurable adhesive layer may be formed on the surface on which the second functional layer is formed, May be formed on the opposite side.

  The photocurable adhesive layer is cured by irradiating exposure light in an exposure process to be described later. That is, in the member with a functional layer obtained by the present invention, the photocurable adhesive layer is formed as a layer obtained by curing the photocurable resin material. Such a photocurable adhesive layer can have good heat resistance.

  The remaining film ratio after the remaining film ratio evaluation test of the photocurable adhesive layer is, for example, preferably 80% or more, more preferably 82% or more, and particularly preferably 85% or more. The remaining film ratio after the remaining film ratio evaluation test can be obtained from the ratio of the film thickness before and after firing the photocurable adhesive layer. Specifically, the residual film ratio = (film thickness after firing) / (film thickness before firing) × 100.

  The photocurable adhesive layer preferably has a weight loss rate of 15% or less after heating for 1 hour within a range of 50 ° C. to 80 ° C., more preferably 13% or less, particularly 10% or less. It is preferable that In addition, the heating temperature for measuring the weight reduction rate may be in the range of 50 ° C to 80 ° C, but is preferably in the range of 50 ° C to 75 ° C, particularly 50 ° C to 70 ° C. It is preferable to be within the range. In addition, the heating time for measuring the weight loss rate may be 1 hour, but in particular, it is preferably in the range of 1 hour to 1.5 hours, particularly in the range of 1.5 hours to 2 hours. It is preferable to be within.

(2) Member to be transferred The member to be transferred is a member to which the functional layer is transferred. The member to be transferred may or may not have optical transparency to exposure light. When the member to be transferred has light transmittance with respect to the exposure light, the light transmittance and the total light transmittance with respect to the exposure light are described in the above-mentioned section of “1. Preparation step (1) Transfer laminate”. The contents can be the same as those described above. When the member to be transferred has a light transmitting property, a transfer laminate, particularly a functional layer that does not have a light transmitting property can be used. Therefore, various functional layers can be transferred onto the member to be transferred. .
In addition, when the transfer functional layer described above does not have light transmittance with respect to exposure light, the member to be transferred usually has light transmittance with respect to exposure light.
The member to be transferred used in the present invention only needs to have at least a base material, may have only a base material, and has a base material and a second functional layer formed on the base material. May be.

The substrate used for the member to be transferred is appropriately selected according to the type of the member with a functional layer. Examples of the substrate used for the member to be transferred include substrates such as plates, sheets, and films. Moreover, as a base material, the molded object which has three-dimensional shapes, such as a resin molded object, can be mentioned, for example. Especially, it is preferable that the base material used for a to-be-transferred member is a board | substrate. The base material used for the member to be transferred may have flexibility or may not have flexibility. The flexibility of the base material used for the member to be transferred may be a level that does not impair the functions of the functional layer transferred onto the base material and the second functional layer formed as necessary. It is preferable to exhibit the same degree of flexibility as that of the member with a functional layer described in “Method for producing member with functional layer”.
As a form of a base material, the form wound by roll shape may be sufficient and the form (sheet | seat base material) which has a magnitude | size corresponding to the form of a member with a functional layer may be sufficient.

In addition to the substrate and molded body described above, examples of the base material used for the member to be transferred include a resin layer formed on a glass base material. When the substrate is a resin layer formed on a glass substrate, the member with a functional layer can be made thinner by peeling the glass substrate from the resin layer of the transferred member after the peeling step described later. it can.
Examples of the material constituting the resin layer include polyimide, polyaramid, polyamideimide, siloxane compounds such as silsesquioxane, silica hybrid material, arylate, isocyanate, and the like. In particular, the resin layer is preferably a polyimide resin layer using polyimide. The thickness of the resin layer is preferably in the range of 3 μm to 10 μm, for example. The resin layer can be formed, for example, by applying a resin composition on a glass substrate and drying it, followed by heat treatment.

  The member to be transferred may have a second functional layer as necessary. The second functional layer can be appropriately selected from the functional layers described above. In the present invention, the second functional layer preferably has a predetermined pattern shape. For example, as shown in FIG. 2, when the second functional layer 3 b is formed in a pattern on the substrate 4 a, surface unevenness is formed on the transferred member 4. Since the fluidity of the adhesive containing the photocurable resin material can be adjusted and the photocurable adhesive layer can be formed using a coating method, the photocurable adhesive layer can be satisfactorily formed on the surface irregularities of the transferred member. It can be made to follow. Further, according to the present invention, the surface unevenness of the transferred member 4 can be filled with the photocurable adhesive layer 5 as shown in FIG. Therefore, flatness can be given to the bonding surface with the functional layer in the photocurable adhesive layer, and the functional layer and the photocurable adhesive layer can be bonded satisfactorily.

  In the present invention, when the member to be transferred has surface irregularities, the surface step is appropriately selected according to the type of the member with a functional layer. In the present invention, the surface step is, for example, preferably 10 μm or less, more preferably in the range of 0.3 μm to 9 μm, particularly preferably in the range of 0.5 μm to 6 μm. This is because, when the surface step is within the above range, the follow-up effect by using the photo-curing adhesive layer can be enhanced compared to the case where the pressure-sensitive adhesive layer is used. The surface level difference can be measured by observing a cross section using a scanning electron microscope (SEM).

3. Bonding step The bonding step in the present invention is a step of bonding the photocurable adhesive layer and the functional layer of the laminate for transfer. In the bonding step, the photocurable adhesive layer formed on the substrate to be transferred and the functional layer formed on the transfer laminate are bonded to face each other.

  The method for bonding the transferred substrate and the transfer laminate can be the same as a general bonding method, for example, by bonding the transferred substrate and the transfer laminate in a single wafer mode. Alternatively, a roll-shaped transfer member and a roll-shaped transfer laminate may be bonded by a Roll to Roll method.

4). Exposure Step The exposure step in the present invention is a step of exposing the photocurable adhesive layer to cure the photocurable resin material and bonding the functional layer onto the transferred member.

  In the exposure step, the exposure light is irradiated from the member side having optical transparency to the exposure light among at least one of the transfer laminate side and the transferred member side. Therefore, the irradiation direction of exposure light may be irradiated from the transfer laminate side or from the transfer member side. Further, in the case where both the transfer laminate and the member to be transferred exhibit optical transparency with respect to the exposure light, the exposure light may be irradiated from both the transfer laminate side and the transfer member side.

The exposure light is not particularly limited as long as the photocurable resin material in the photocurable adhesive layer can be cured, and can be appropriately selected according to the type of the photocurable resin material. As the exposure light, ultraviolet rays having a wavelength in the range of 100 nm to 450 nm can be usually used. Among these, the exposure light is preferably ultraviolet rays in the range of 350 nm to 380 nm. This is because the photocurable adhesive layer can be cured well.
The exposure light source is not particularly limited as long as desired exposure light can be irradiated, and a known exposure light source can be used. Specific examples include a mercury lamp.

  Regarding the exposure light irradiation intensity, the distance from the light source to the photocurable adhesive layer, the exposure time, and other exposure conditions, the type of the photocurable resin material, the thickness of the photocurable adhesive layer, the transfer laminate and the transferred object It can adjust suitably according to the kind etc. of member.

5. Transfer Process The transfer process in the present invention is a process of transferring the functional layer onto the member to be transferred by peeling off the transfer substrate of the transfer laminate.
The transfer substrate peeling method can be the same as the peeling method in a general transfer method.

6). The manufacturing method of the member with a functional layer The manufacturing method of the member with a functional layer of this invention will not be specifically limited if it has the preparation process mentioned above, the application | coating process, the bonding process, the exposure process, and the peeling process, Necessary process Can be added as appropriate. As such a process, it is preferable that it is a process including heat processing, for example.

  In the method for manufacturing a member with a functional layer of the present invention, for example, each step may be performed using a Roll to Roll method. That is, in the present invention, the transfer substrate in the transfer laminate and the substrate in the transferred member are roll-shaped substrates wound around a roll, and the coating step and the bonding The step and the exposure step are continuously performed, and in the peeling step, the transfer substrate in the transfer laminate may be wound to peel off.

FIG. 3 is a schematic process diagram for explaining another example of the method for producing a member with a functional layer of the present invention.
3A to 3E are schematic process diagrams showing an example of a method for producing a member with a functional layer of the present invention. In the present invention, first, as shown in FIG. 3A, a transfer substrate 2 (roll-shaped transfer substrate 2) wound around a roll and a functional layer formed on the transfer substrate 2 are used. A transfer laminate 1 having 3a is prepared (preparation step). Next, as shown in FIG. 3B, light is applied to the base material 4a (roll-like base material 4a) (transfer target member 4) wound around a roll using a coating apparatus C such as a die coater. The photocurable adhesive layer 5 is formed by applying an adhesive containing a curable resin material (application process). Next, as shown in FIG.3 (c), the photocurable adhesive layer 5 and the functional layer 3a of the laminated body 1 for transcription | transfer are bonded (bonding process). Next, as shown in FIG. 3D, the photocurable adhesive layer 5 is exposed by irradiating the exposure light L to cure the photocurable resin material, and the functional layer 3 a is formed on the transferred member 4. Are adhered (exposure process). Next, as shown in FIG. 3E, the functional layer 3a is transferred onto the member 4 to be transferred by winding the transfer substrate 2 of the transfer laminate 1 around a roll and peeling it off (transfer process). . The functional layer-equipped member 10A can be manufactured through the above steps. In the manufacturing method shown in FIG. 3, for example, a plurality of processes can be continuously performed by using the transfer device R or the like.

  The method for producing a member with a functional layer of the present invention can be applied to various methods for producing a member with a functional layer. For example, a display device member, a display device, a building material, a circuit board, a packaging member, a transport device member such as an automobile, and the like can be given.

  The member with a functional layer obtained by the production method of the present invention may have flexibility, for example, or may not have flexibility. In addition, the flexibility of the member with a functional layer is, for example, that after performing the following bending resistance test 100,000 times, there is no appearance abnormality such as peeling or cracking of the functional layer, and the function of the functional layer is not impaired. That means. The bending resistance test can be performed, for example, using a DLDMMLH-FU planar body U-shaped repeat tester manufactured by Yuasa System Co., Ltd. under conditions of a bending radius R = 3 mm, a rotation speed 120 rpm / min, and a stroke 20 mm.

B. Manufacturing method of display device member The manufacturing method of a display device member of the present invention is a preparatory step of preparing a transfer laminate having a transfer substrate and a functional layer for display device formed on the transfer substrate. A coating step of forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material on a member to be transferred having at least a substrate, the photocurable adhesive layer, and the transfer A bonding step of bonding the functional layer for a display device of the laminate for a display, and exposing the photocurable adhesive layer to cure the photocurable resin material, so that the above-described member is transferred onto the transferred member. An exposure step of bonding the functional layer for display device, and a transfer step of transferring the functional layer for display device onto the member to be transferred by peeling the transfer substrate of the laminate for transfer. It is characterized by that.

  The manufacturing method of the member for display apparatuses of this invention is demonstrated referring a figure. 4A to 4E are schematic process diagrams showing an example of a method for manufacturing a display device member of the present invention. In the present invention, first, as shown in FIG. 4A, a transfer laminate 11 having a transfer substrate 12 and a display device functional layer 13 formed on the transfer substrate 12 is prepared (preparation). Process). FIG. 4 shows an example in which the display device functional layer 13 is an optical functional member 13c having an optical functional layer 13a and an alignment layer 13b. Next, as shown in FIG. 4B, a photocurable adhesive layer 15 is formed by applying an adhesive containing a photocurable resin material on the base material 14a (transferred member 14) (application). Process). Next, as shown in FIG.4 (c), the photocurable adhesive layer 15 and the display apparatus functional layer 13 in the transfer laminated body 11 are bonded (bonding process). Next, as shown in FIG. 4D, the photocurable adhesive layer 15 is exposed by irradiating the exposure light L, thereby curing the photocurable resin material and displaying the display device function on the transferred member 14. The layer 13 is adhered (exposure process). Next, as shown in FIG. 3E, the display substrate functional layer 13 is transferred onto the transfer target member 14 by peeling the transfer substrate 12 of the transfer laminate 11 (transfer process). Through the above steps, the display device member 10A1 can be manufactured.

According to the present invention, since a functional layer for a display device can be formed on a member to be transferred using a thin photo-curing adhesive layer, a thin display device member can be formed.
Hereinafter, each process of the manufacturing method of the member for display apparatuses of this invention is demonstrated.

1. Preparation Step The preparation step in the present invention is a step of preparing a transfer laminate having a transfer substrate and a display device functional layer formed on the transfer substrate.

(1) Functional layer for display device The functional layer for display device in the transfer laminate is appropriately selected according to the type of member for display device. As the display device functional layer, for example, a color filter functional layer for forming at least one of a colored portion and a light shielding portion in a color filter, a sensor electrode in a touch panel, and an insulating layer formed as necessary are formed. The functional layer for touch panels for performing, the decorating part in a decorating member, an optical functional member, and a protective layer can be mentioned. Moreover, as a functional layer for display apparatuses, a columnar spacer, a transparent electrode, etc. can be mentioned, for example.

(A) Color filter functional layer The color filter functional layer is a functional layer for forming at least one of a colored portion and a light shielding portion in the color filter.

(I) Shading part The shading part in this invention is a member which is arrange | positioned on a transparent base material and has a some opening part.

  The light shielding portions in the present invention are arranged in parallel so as to extend in the first direction and the second direction intersecting the first direction, and define the opening. Examples of the shape of the opening include a rectangular shape. In addition, the width of the opening in the light shielding portion can be the same as the width of the opening in the light shielding portion in a general color filter, and thus description thereof is omitted here.

  The line width of the light-shielding portion in the present invention can be appropriately selected according to the use of the display device member obtained by the present invention, and is not particularly limited. For example, it may be in the range of 1 μm to 30 μm. In particular, it is preferably in the range of 1.5 μm to 28 μm, and particularly preferably in the range of 2 μm to 25 μm. When the line width of the light shielding portion is smaller than the above range, there is a possibility that the opening cannot be sufficiently defined. Further, when the line width of the light shielding portion is larger than the above range, there is a possibility that a high-definition color filter cannot be obtained. When the line width of the light shielding part is not constant, it is preferable that all the line widths of the light shielding part are within the above range.

  The thickness of the light shielding part in the present invention is not particularly limited as long as it is a thickness that can exhibit a desired light shielding property, and is appropriately adjusted according to the material used for the light shielding part. As a specific thickness of the light shielding part in the present invention, for example, it can be set to about 0.5 μm to 3.0 μm.

  The constituent material of the light shielding part in the present invention is not particularly limited as long as it is a material that can exhibit a desired light shielding property. Specifically, the light-shielding portion is usually a cured product containing a black color material in a binder resin, but may contain a colored color material as necessary in addition to the black color material.

  The binder resin used for the light shielding portion is preferably a material that can disperse a black color material, for example. Moreover, the binder resin used for the light shielding part is appropriately selected according to the method for forming the light shielding part. When the light-shielding portion is formed by photolithography, examples of the binder resin include photosensitive resins having reactive vinyl groups such as acrylate-based, methacrylate-based, polyvinyl cinnamate, or cyclized rubber. . When the light shielding part is formed by a printing method or an ink jet method, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin. , Polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.

  As a black color material used for the light shielding part, for example, the same material as that of a general light shielding part can be used, and any of a pigment and a dye can be used. Specific examples include carbon black and titanium black.

  The colored color material other than the black color material used for the light shielding portion may be any material that can form a light shielding portion having a desired light shielding property, such as red, green, blue, yellow, orange, purple, and the like. Colored materials of each color are listed. Moreover, both a pigment and a dye can be used for the colored material. Colored color materials may be used singly or in combination of two or more. The colored color material may be a single color material or a mixture of two or more color materials. In addition, about a colored color material, since it can be made the same as that of the colored color material used for a general color filter, description here is abbreviate | omitted.

The content of the black color material contained in the light shielding part is not particularly limited as long as it is a level that can form a light shielding part having a desired light shielding property. For example, a black color material is included in the light shielding part. The main component of the coloring material is preferable. Specifically, the content of the black color material contained in the light shielding portion is preferably in the range of 3% by mass to 20% by mass, and more preferably in the range of 4% by mass to 18% by mass. It is particularly preferable that the content be in the range of 5% by mass to 15% by mass.
Moreover, as content of colored color materials other than the black color material contained in a light-shielding part, it is preferable to exist in the range of 1 mass%-8 mass%, for example, and the range of 1 mass%-6 mass% is especially preferable. It is preferable that it is in the range, and it is particularly preferable to be in the range of 1% by mass to 4% by mass.

  In addition to the above-described constituent materials, the light-shielding portion in the present invention may contain other materials as necessary. Examples of other materials include a photopolymerization initiator, a sensitizer, a coating property improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, and a flame retardant.

(Ii) Colored portion The colored portion in the present invention is a member disposed in the opening in the light shielding portion described above.

  The thickness of the colored portion in the present invention can be the same as the thickness of the colored portion used in a general color filter, and can be set within a range of 1 μm to 5 μm, for example.

  In the present invention, for example, it has three colored portions of red, green, and blue. The color of the colored portion may be any color that includes at least three colors of red, green, and blue. For example, three colors of red, green, and blue, four colors of red, green, blue, and yellow, or red, Five colors such as green, blue, yellow, and cyan may be used.

  As a coloring part, what disperse | distributed the coloring material in binder resin can be used, for example. Examples of the color material used in the colored portion include pigments and dyes of each color. For example, examples of the coloring material used in the red coloring portion include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Examples of the colorant used in the green coloring portion include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindoline pigments. Examples include linone pigments. Furthermore, examples of the color material used for the blue colored portion include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and the like. These pigments and dyes may be used alone or in combination of two or more. Examples of the binder resin used for the colored portion include photosensitive resins having reactive vinyl groups such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber.

  In addition to the above-described materials, the colored portion may contain a photopolymerization initiator, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. It can be included.

  In addition, a white layer containing a binder resin may be formed on the same plane where the colored portion is formed, without containing the above-described color material.

(Iii) Protective layer The functional layer for color filters may further have a protective layer as necessary. A protective layer is a layer (hard coat layer) formed in order to protect a coloring part, a light-shielding part, etc. For example, the protective layer may be formed directly on the colored portion and the light shielding portion using the material of the protective layer. In addition, for example, a protective layer may be bonded on the colored portion and the light shielding portion via a photocurable adhesive layer. That is, the protective layer may be formed using the method for manufacturing a display device member of the present invention. About the thickness of a protective layer, it adjusts suitably according to thickness, such as a coloring part and a light-shielding part. About the material of a protective layer, it can select suitably from the material demonstrated by the term of the (d) optical function member (iii) protective layer mentioned later, and can use it.

(B) Functional layer for touch panel The functional layer for touch panel is a functional layer for forming the sensor electrode in a touch panel. The touch panel has a transparent substrate and a sensor electrode arranged on the transparent substrate. In this invention, you may have an insulating layer located so that a sensor electrode may be covered. Moreover, in this invention, you may be comprised so that a photocurable adhesive layer may serve as an insulating layer.
For the touch panel according to the present invention, for example, a resistance film method, a capacitance method, an optical method, an electromagnetic induction method, an ultrasonic method, or the like can be used.

(I) Sensor electrode The sensor electrode in this invention is a member used in order to perform the position detection of a touch panel.
The sensor electrode in the present invention may be a transparent conductive layer having transparency, or may be a mesh electrode with a fine line. In the present invention, when the sensor electrode is a mesh electrode made of fine lines, even if the material used for the sensor electrode is an opaque metal material, it can be an apparently transparent sensor electrode.

When the sensor electrode in the present invention is a transparent conductive layer, the thickness of the sensor electrode and the like can be appropriately adjusted according to the use of the display device member obtained by the present invention, and is the same as that of a general sensor electrode. The description here is omitted.
When the sensor electrode in the present invention is a mesh electrode, the thickness, line width, pitch, aperture ratio, etc. of the sensor electrode can be appropriately adjusted according to the use of the display device member obtained by the present invention. Since it can be the same as that of a general sensor electrode, description thereof is omitted here.

When the sensor electrode is a transparent electrode layer, for example, a transparent conductive material such as tin oxide, indium tin oxide called ITO, or indium zinc oxide called IZO is used as the constituent material of the sensor electrode in the present invention. be able to.
Further, when the sensor electrode in the present invention is a mesh electrode made of an opaque metal material, the metal material is, for example, silver, gold, copper, chromium, platinum, aluminum alone or any one of them. And the like. As the metal alloy, an alloy of silver, palladium, copper or the like called APC can be used. Further, as the metal composite, a three-layer structure of molybdenum, aluminum, and molybdenum called MAM is also applicable. Furthermore, for example, a conductive polymer obtained by adding the above metal to a resin layer forming composition such as PEDOT can also be used.

(Ii) Insulating layer The insulating layer in this invention is a member which can be used when insulating the sensor electrode mentioned above.

  The insulating layer in the present invention is usually disposed so as to cover the sensor electrode. The thickness of the insulating layer is preferably a thickness that can insulate the sensor electrode and prevent a short circuit, and can be appropriately adjusted according to the design of the sensor electrode. For example, the thickness of the insulating layer can be in the range of 0.5 μm to 3 μm.

  The constituent material of the insulating layer in the present invention is preferably a material having a desired insulating property, and materials generally used for touch panels can be used. Specifically, insulating resin materials such as polyimide resin, acrylic resin, cardo resin, epoxy resin, and melamine resin, inorganic materials such as glass, and the like can be given. In addition, the structural material used for an insulating layer may be used individually by 1 type, and may be used in combination of 2 or more type. Further, the insulating layer may have a single layer structure or a multilayer structure including two or more layers.

(Iii) Protective layer The functional layer for a touch panel may further have a protective layer as necessary. The protective layer is a layer (hard coat layer) formed to protect the sensor electrode, the insulating layer, and the like. The protective layer may be formed directly on the sensor electrode and the insulating layer, for example, using the material of the protective layer. In addition, for example, a protective layer may be bonded to the sensor electrode and the insulating layer via a photocurable adhesive layer. That is, the protective layer may be formed using the method for manufacturing a display device member of the present invention. About the thickness of a protective layer, it adjusts suitably according to the thickness of a sensor electrode, an insulating layer, etc. About the material of a protective layer, it can select suitably from the material demonstrated by the term of the (d) optical function member (iii) protective layer mentioned later, and can use it.

(C) Decoration part A decoration part is a functional layer used for a decoration member.
The decoration part used for a decoration member is a member which exhibits a predetermined color. Therefore, in the display device using the display device member, the decorative member in the present invention is arranged so that the decorative portion overlaps in a non-pixel region such as a frame portion in a plan view, thereby improving the appearance of the display device. It becomes possible to improve.

  The decoration part in this invention can improve the external appearance of the display apparatus using the member for display apparatuses by exhibiting a predetermined color.

  Since the thickness of the decoration part in this invention can be suitably adjusted according to the use etc. of the display apparatus using the member for display apparatuses, and since it can be made the same as that of a general decoration part, here Description is omitted.

  The color which the decoration part in this invention exhibits can be suitably selected according to the design etc. of a display apparatus. In the case where the decorative portion is a black decorative portion exhibiting black, the constituent material of the black decorative portion is the same as the constituent material of the light shielding portion described in the section “(a) Color filter (i) Light shielding portion” described above. Therefore, the description here is omitted. Further, when the decorative part is a white decorative part exhibiting white, examples of the constituent material of the white decorative part include titanium oxide, silica, talc, kaolin, clay, barium sulfate, and calcium hydroxide. .

  The functional layer for decorating part may further have a protective layer as necessary. A protective layer is a layer (hard coat layer) formed in order to protect a decoration part. The protective layer may be directly formed on the decorative portion using, for example, the material of the protective layer. Further, for example, a protective layer may be bonded onto the decorative portion via a photocurable adhesive layer. That is, the protective layer may be formed using the method for manufacturing a display device member of the present invention. About the thickness of a protective layer, it adjusts suitably according to the thickness of a decoration part. About the material of a protective layer, it can select suitably from the material demonstrated by the term of the (d) optical function member (iii) protective layer mentioned later, and can use it.

(D) Optical functional member The optical functional member in the present invention is a member having an optical functional layer in which liquid crystalline compounds are aligned in one direction. Moreover, the optical function member may have an orientation layer in addition to the optical function layer.
Hereinafter, the optical functional layer and the alignment layer constituting the optical functional member will be described.

(I) Optical functional layer The liquid crystalline compound contained in the optical functional layer in the present invention can exhibit desired optical characteristics by being oriented in one direction. Specific examples of the alignment state of the liquid crystalline compound include a state in which the liquid crystalline compound is aligned in the length direction of the optical functional layer and a state in which the liquid crystalline compound is aligned in the thickness direction of the optical functional layer. The former liquid crystal structure is referred to as a homogeneous structure (parallel alignment structure), and by having such a structure, the optical function layer can be optically imparted with properties as an A plate. The latter liquid crystal structure is called a homeotropic structure (vertical alignment structure), and by having such a structure, the optical function layer can be imparted with an optically positive C-plate property. Further, the alignment state of the liquid crystalline compound may be a cholesteric alignment state in which the liquid crystalline compound exhibits a regular helical structure. By having such an orientation state, the optical function layer can be imparted with an optically negative C-plate property.

  The thickness of the optical functional layer can be appropriately adjusted according to the type of liquid crystalline compound and the optical characteristics to be imparted to the optical functional layer, and is not particularly limited. For example, it is preferable that the in-plane retardation of the optical functional layer is formed within a range corresponding to λ / 4. The in-plane retardation value of the optical functional layer is, for example, preferably in the range of 100 nm to 160 nm, more preferably in the range of 110 nm to 150 nm, and still more preferably in the range of 120 nm to 140 nm. . When the thickness of the optical functional layer is set to a distance within the range where the in-plane retardation of the optical functional layer corresponds to λ / 4 minutes, the specific distance is determined by the optical functional layer described later. For example, when a general liquid crystal compound is used, the thickness of the optical functional layer can be in the range of 0.5 μm to 2 μm.

  The optical function layer is a member that transmits light emitted from the backlight unit when the display device member is used in the display device. Therefore, the optical functional layer in the present invention preferably has a predetermined transparency. Here, “transparent” means transparent to the extent that light irradiated from the backlight portion is transmitted unless otherwise specified. In addition, about the specific transmittance | permeability of an optical function layer, since it can be made the same as that of a general optical function layer, description here is abbreviate | omitted.

  The liquid crystalline compound contained in the optical functional layer is not particularly limited as long as it is a material that can impart desired optical functionality to the optical functional layer. Among these, a liquid crystalline compound exhibiting photosensitivity is preferable, and a liquid crystalline compound exhibiting a nematic phase is particularly preferably used. This is because nematic liquid crystals are easily arranged regularly as compared with liquid crystal compounds exhibiting other liquid crystal phases.

  Moreover, it is preferable to use the polymeric liquid crystal material which has a polymerizable functional group for the liquid crystalline compound in this invention. This is because the polymerizable liquid crystal materials can be polymerized with each other via a polymerizable functional group, and thus the mechanical strength of the optical functional layer can be improved.

  Examples of such polymerizable functional groups include various polymerizable functional groups that are polymerized by the action of ionizing radiation such as ultraviolet rays and electron beams, or heat. Representative examples of the polymerizable functional group include a radical polymerizable functional group or a cationic polymerizable functional group. Further, representative examples of radically polymerizable functional groups include functional groups having at least one addition-polymerizable ethylenically unsaturated double bond, and specific examples include vinyl groups having or not having substituents, An acrylate group (generic name including an acryloyl group, a methacryloyl group, an acryloyloxy group, and a methacryloyloxy group) and the like can be given. Moreover, an epoxy group etc. are mentioned as a specific example of a cationically polymerizable functional group. In addition, examples of the polymerizable functional group include an isocyanate group and an unsaturated triple bond. Among these, from the viewpoint of the process, a functional group having an ethylenically unsaturated double bond is preferably used.

The polymerizable liquid crystal material may have a plurality of polymerizable functional groups or may have only one. Moreover, you may mix and use what has multiple polymerizable functional groups, and what has only one.
Specific examples of the polymerizable liquid crystal material include compounds described in JP-A-7-258638, JP-A-10-508882, and JP-A-2003-287623.

  One kind of liquid crystalline compounds as described above may be used, or two or more kinds thereof may be mixed and used. In the present invention, when two or more kinds of liquid crystal materials are mixed and used, a polymerizable liquid crystal material and a liquid crystal material having no polymerizable functional group may be mixed and used.

(Ii) Alignment layer In the present invention, the optical functional member may have an alignment layer. The alignment layer is a member containing a photo-alignment material.

  Here, the “photo-alignment material” included in the alignment layer refers to a material that can exhibit an alignment regulating force by a photo-alignment method. In addition, the “photo-alignment method” is a method of expressing the alignment regulating force (anisotropy) of the alignment layer by irradiating the alignment layer with light having an arbitrary polarization state (polarized light). Therefore, it can be said that the photo-alignment material in the present invention is a material that can exhibit an alignment regulating force by irradiating polarized light. Furthermore, the “alignment regulating force” means an interaction that aligns the liquid crystalline compounds contained in the optical functional layer described above.

The thickness of the alignment layer in the present invention can be adjusted according to the constituent materials. The thickness of the alignment layer in the present invention is, for example, preferably in the range of 0.01 μm to 0.5 μm, more preferably in the range of 0.02 μm to 0.1 μm, and particularly 0.03 μm to 0. It is preferable to be in the range of 0.05 μm. When the thickness of the alignment layer in this invention exists in the said range, desired alignment control power can be expressed with respect to the liquid crystalline compound contained in the optical function layer mentioned above.
In addition, the thickness of the alignment layer in this invention can be measured by observing a cross section, for example using a scanning electron microscope (SEM).

  The alignment layer in the present invention is a member that transmits light emitted from the backlight unit when the display device member is used in a display device. Therefore, the alignment layer in the present invention preferably has a predetermined transparency. Here, “transparent” means transparent to the extent that light irradiated from the backlight portion is transmitted unless otherwise specified. In addition, about the specific transmittance | permeability of an orientation layer, since it can be made the same as that of a general orientation film, description here is abbreviate | omitted.

The alignment material included in the alignment layer is not particularly limited as long as it is a material that can exhibit an alignment regulating force by irradiating polarized light. Such photo-alignment materials are a photoisomerization material that reversibly changes the alignment regulation force by changing only the molecular shape by cis-trans change, and a photoreactive material that changes the molecule itself by irradiating polarized light. And can be broadly divided. In the present invention, any of a photoisomerization material and a photoreactive material can be suitably used, but it is more preferable to use a photoreactive material.
Since the photoreactive material is one in which molecules react with each other when polarized light is irradiated to express the alignment regulating force, it is possible to irreversibly express the alignment regulating force. Therefore, the photoreactive material is superior in the alignment control force in the temporal stability.

  The photoreactive material can be further classified according to the type of reaction caused by polarized light irradiation. Specifically, a photodimerization-type material that develops an alignment regulating force by causing a photodimerization reaction, a photocoupled material that develops an orientation regulating force by producing a photolysis reaction, and a photodecomposition reaction and a photobinding reaction. Can be divided into photodecomposition-bonding materials and the like that exhibit orientation regulating force. In the present invention, any of the above-mentioned photoreactive materials can be suitably used, but among them, it is preferable to use a photodimerization type material from the viewpoint of stability and reactivity (sensitivity).

  The photodimerization-type material is not particularly limited as long as it is a material that can exhibit an orientation regulating force by causing a photodimerization reaction. In the present invention, the wavelength of light that causes a photodimerization reaction is preferably 280 nm or more, particularly preferably in the range of 280 nm to 400 nm, and more preferably in the range of 300 nm to 380 nm. .

  Examples of such a photodimerization type material include cinnamate, coumarin, benzylidenephthalimidine, benzylideneacetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleinimide, or a polymer having a cinnamylideneacetic acid derivative. In the present invention, among them, a polymer having at least one of cinnamate and coumarin, and a polymer having cinnamate and coumarin are preferably used. Specific examples of such a photodimerization type material include compounds described in, for example, JP-A-9-118717, JP-A-10-506420, and JP-A-2003-505561.

  The photo-alignment material used in the present invention may be only one type or two or more types.

(Iii) Protective layer In the present invention, the optical functional member may further have a protective layer.
The protective layer in this invention is a member which can protect the optical function layer arrange | positioned under the said protective layer from the solvent, light, etc., for example.

  The protective layer in the present invention preferably has a function of protecting the optical functional layer from deterioration due to a solvent, light or the like. Therefore, the protective layer in the present invention is preferably a member having chemical resistance, light resistance and heat resistance.

  The thickness of the protective layer in the present invention is preferably a thickness that can provide a protective function as the protective layer, specifically, chemical resistance, light resistance and heat resistance. For example, it can be in the range of 1 μm to 5 μm.

  As the constituent material of the protective layer in the present invention, the same material as the protective layer of a general display device can be used. Among them, it is preferable to use a material having chemical resistance and light resistance. The constituent material of such a protective layer may be an organic material or an inorganic material. When an inorganic material is used, a protective layer can be formed by a sputtering method, so that a heating step is not required when forming the protective layer as in the case of using an organic material. The influence of can be suppressed. Examples of the organic material used for the protective layer in the present invention include photo-curing resins or thermosetting resins such as photosensitive polyimide resins, epoxy resins and acrylic resins, and inorganic materials. Other materials include polymerization initiators and various additives.

(E) Protective layer The functional layer for a display device in the present invention may be a protective layer. In the present invention, the laminate for transfer product may have a configuration in which a protective layer is formed on a transfer substrate. When the laminated body for transfer has the above-described configuration, the protective layer can be formed on another member (for example, a color filter, a touch panel, a decorative member, etc.) or a functional layer by a transfer method. In addition, about the thickness of a protective layer, a protective function, material, etc., it can select suitably by the structure of the member or functional layer by which the protective layer is transcribe | transferred. For example, when the member to be transferred has a protective layer, the hardness of the protective layer of the laminate for transfer may be adjusted to be high.

(F) Others In addition to the above, examples of the display device functional layer in the present invention include columnar spacers and transparent electrodes. Since these functional layers can be the same as those used for a general color filter or the like, description thereof is omitted here.

(2) Preparatory process About the base material for transcription | transfer used for this invention, it can be made to be the same as that of the content demonstrated by the term of the "A. manufacturing method of a member with a functional layer" mentioned above. In addition, the method for forming the functional layer for a display device described above can be the same as a general color filter, a touch panel, a method for forming a decorative member, and a method for forming an optical functional member. Omitted. For example, the method described in Unexamined-Japanese-Patent No. 2015-31863 and Unexamined-Japanese-Patent No. 2012-108563 is mentioned.

2. Application Step The application step in the present invention is a step of forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material on at least a transferred member having a substrate.

As a base material used for the member to be transferred, only the base material may be included, or a functional layer for the second display device may be provided on the base material as necessary.
The member to be transferred in the present invention may or may not have transparency to exposure light.

The substrate used for the member to be transferred is preferably a transparent substrate.
Here, the term “transparent” refers to transparency that does not hinder the operator of the display device using the display device member from seeing from the operation surface unless otherwise specified. Therefore, “transparent” includes colorless and transparent and colored transparency that does not hinder visibility, is not defined by strict transmittance, and determines the degree of transparency according to the use of the display device member, etc. be able to.

  The thickness of the transparent substrate in the present invention is not particularly limited as long as it is a thickness that can support each member, and can be appropriately designed according to the use of the display device member. Since the specific thickness of the transparent substrate can be the same as the thickness of the transparent substrate used for a general color filter, description thereof is omitted here.

  The material of the transparent substrate in the present invention is not particularly limited as long as it is a material used for a general color filter. For example, inorganic material having no flexibility such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate, etc. Examples thereof include a substrate and a flexible resin substrate such as a transparent resin film and an optical resin plate. Among them, it is preferable to use an inorganic substrate, and it is preferable to use a glass substrate among inorganic substrates. Furthermore, it is preferable to use an alkali-free type glass substrate among the glass substrates. This is because the alkali-free type glass substrate is excellent in dimensional stability and workability in high-temperature heat treatment, and does not contain an alkali component in the glass, and thus is suitable for, for example, a color filter used in a display device. .

  Moreover, it is preferable that the base material used for a to-be-transferred member is the resin layer formed on the glass base material. About the resin layer formed on the glass base material, it can be made to be the same as that of the content demonstrated by the term of the "A. manufacturing method of a member with a functional layer" mentioned above.

  The functional layer for the second display device can be appropriately selected from the functional layers for the display device described above. When the display device functional layer in the transfer member is an optical functional member, the second display device functional layer is at least one of a color filter functional layer, a touch panel functional layer, and a decorative member functional layer. Is preferred. In this case, the second functional layer for display device may be disposed on the bonding surface of the functional layer for display device in the transferred member, or may be disposed on the opposite surface.

3. Bonding step The bonding step in the present invention is a step of bonding the photocurable adhesive layer and the display device functional layer of the transfer laminate. About a bonding process, since it can be made to be the same as that of the content demonstrated by the term of the "A. manufacturing method of a member with a functional layer" mentioned above, description here is abbreviate | omitted.

4). Exposure Step The exposure step in the present invention is a step of exposing the photocurable adhesive layer to cure the photocurable resin material and bonding the display device functional layer onto the member to be transferred.

When the transfer laminate in the present invention is a color filter functional layer, a touch panel functional layer, and a decorative portion functional layer, exposure light is usually irradiated from the transferred member side.
Note that the exposure light, the exposure conditions, and the like in the exposure step can be the same as the contents described in the above-mentioned section “A. Method for producing member with functional layer”, and thus the description thereof is omitted here.

5. Transfer Process The exposure process in the present invention is a process of transferring the display device functional layer onto the transfer target member by peeling the transfer substrate of the transfer laminate. The transfer step can be the same as the content described in the above-mentioned section “A. Method for producing member with functional layer”, and thus the description thereof is omitted here.

6). Others The method for producing a member for a display device of the present invention is not particularly limited as long as it includes the above-described steps, and necessary steps can be appropriately selected and added. In this invention, you may have the process of bonding the obtained member for display apparatuses to a display panel etc. further through a photocurable adhesive layer. In the method for manufacturing a member with a functional layer of the present invention, for example, each step may be performed using a Roll to Roll method. The case where the Roll to Roll method is used can be the same as the content described in the above-mentioned section “A. Method for producing member with functional layer”, and thus the description thereof is omitted here.

  Examples of the display device member obtained by the present invention include a color filter, a touch panel, a decorative member, a substrate with an optical function member, and a laminate thereof.

  The manufacturing method of the member for display apparatuses of this invention can be used suitably, for example when manufacturing the member used for a flexible display apparatus. The flexible display device is a display device using a member in which a predetermined functional layer is laminated on a flexible substrate. Since the flexible display device can be freely deformed, a rollable mobile display device can be realized, for example, and a display device more suitable for mobile can be obtained.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  Hereinafter, the Example and the comparative example are shown and the detail of the manufacturing method of the member with a functional layer of this invention is demonstrated.

[Example 1]
[Production of member to be transferred (color filter)]
A color filter having a light shielding part, a colored part and a protective part (second functional layer) formed on a glass substrate (transfer member) was produced by the following procedure.

(Preparation of curable resin composition)
The polymerization tank is charged with 63 parts by weight of methyl methacrylate (MMA), 12 parts by weight of acrylic acid (AA), 6 parts by weight of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by weight of diethylene glycol dimethyl ether (DMDG). After stirring and dissolving, 7 parts by weight of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by weight of glycidyl methacrylate (GMA), 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition>
-16 parts by weight of the above-mentioned copolymer resin solution (solid content 50%)-24 parts by weight of dipentaerythritol pentaacrylate (Sartomer SR399)-Orthocresol novolac type epoxy resin (Oka Chemical Shell Epoxy, Epicoat 18)
0S70) 4 parts by weight 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
4 parts by weight • 52 parts by weight of diethylene glycol dimethyl ether

(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed in a sand mill to prepare a black pigment dispersion.

<Composition of black pigment dispersion>
・ Black pigment 23 parts by weight ・ Polymer dispersing agent (Big Chemie Japan Co., Ltd. Disperbyk 111) 2 parts by weight ・ Solvent (diethylene glycol dimethyl ether) 75 parts by weight

Next, the components of the following amounts were sufficiently mixed to obtain a light shielding part composition.
<Composition of composition for light shielding part>
-61 parts by weight of the black pigment dispersion-20 parts by weight of the curable resin composition-30 parts by weight of diethylene glycol dimethyl ether

  The light shielding part composition was applied on a 0.7 mm thick glass substrate (Asahi Glass Co., Ltd. AN material) with a spin coater and dried at 100 ° C. for 3 minutes to form a light shielding layer having a thickness of about 1 μm. The light-shielding layer is exposed to a light-shielding pattern (repetition of RGB with a 75 μm pitch stripe shape) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution. Heat treatment was performed by leaving it for 30 minutes to form a light-shielding portion having a plurality of openings.

(Formation of colored parts)
A red curable resin composition having the following composition is applied onto the glass substrate on which the light-shielding part is formed as described above by a spin coating method (application thickness: 2.0 μm), and then dried in an oven at 70 ° C. for 3 minutes. did. Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and ultraviolet rays are applied only to the region corresponding to the colored region formation region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Irradiated for 10 seconds. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of a red curable resin composition was removed. Thereafter, the substrate was left in an atmosphere at 230 ° C. for 25 minutes to perform heat treatment to form a red relief pattern (red colored portion) in the opening of the light shielding portion.
Next, the green relief pattern (green coloring part) was formed in the opening part of the light-shielding part by the process similar to red relief pattern formation using the green curable resin composition of the following composition. Furthermore, using the blue curable resin composition having the following composition, a blue relief pattern (blue colored portion) was formed in the opening of the light shielding portion by the same process as the formation of the red relief pattern.

(Formation of protective layer)
Thereafter, the curable resin composition described above as a protective layer was applied by a spin coating method and dried to form a coating film. A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition, and only the spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left to stand in an atmosphere at 230 ° C. for 30 minutes to perform a heat treatment to form a protective layer.
In this way, a color filter was obtained.

<Composition of red curable resin composition>
・ C. I. 7 parts by weight of Pigment Red 254 3 parts by weight of a polysulfonic acid type polymer dispersant 23 parts by weight of the curable resin composition 67 parts by weight of 3-methoxybutyl acetate

<Composition of green curable resin composition>
・ C. I. Pigment Green 58 7 parts by weight C.I. I. Pigment Yellow 138 1 part by weight, polysulfonic acid type polymer dispersant 3 parts by weight, the curable resin composition 22 parts by weight, and 3-methoxybutyl acetate 67 parts by weight

<Composition of blue curable resin composition>
・ C. I. Pigment Blue 1 5 parts by weight, polysulfonic acid type polymer dispersant 3 parts by weight, the curable resin composition 25 parts by weight, and 3-methoxybutyl acetate 67 parts by weight

[Production of transfer laminate]
A PET film having a thickness of 100 μm was prepared as a transfer substrate.
A photo-alignment film composition containing a photo-alignment material having a polyvinyl cinnamate (PVCi) group on a transfer substrate so that the film thickness after curing is about 1.5 μm (PGME is used as a solvent) Was applied by a die coating method.
And it was made to dry for 2 minutes within the dryer adjusted to 90 degreeC, the solvent was evaporated, and the composition was thermosetted, and the photo-alignment film (alignment layer) was formed.
On top of that, a liquid crystal composition containing a liquid crystal compound exhibiting a photopolymerizable nematic phase and a photopolymerization initiator (solid content 30%, using MIBK as a solvent) is applied by a die coating method and dried to be 1 μm. A liquid crystal layer was formed to obtain a transfer laminate having an optical functional layer.

[Preparation of UV curable adhesive layer]
An ultraviolet curable resin was applied to the colored portion side surface of the color filter by a spin coating method (application thickness: 3.0 μm). Thereafter, the coating film was dried in an oven at 70 ° C. for 3 minutes to form an ultraviolet curable adhesive layer.

[Bonding process, exposure process, and transfer process]
The ultraviolet curable adhesive layer of the color filter and the optical functional layer of the transfer laminate were bonded so that air did not enter. Thereafter, ultraviolet rays were irradiated from the surface on the optical functional member side to cure the ultraviolet curable adhesive layer. Thereafter, the transfer substrate was peeled off, and the optical functional layer was transferred to the colored portion side surface of the color filter. The base material for display apparatuses was obtained by the above process.

[Formation of functional layer (protection part)]
On the surface of the obtained display device substrate opposite to the ultraviolet curable adhesive layer of the optical functional layer, the curable resin composition described above was applied by spin coating and dried to form a coating film. A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition, and only the spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left to stand in an atmosphere at 230 ° C. for 30 minutes to perform heat treatment to form a protective part.

[Example 2]
[Production of member to be transferred (decorative member)]
The decorating member which has the decorating part (2nd functional layer) formed on the glass substrate (transferred member) with the following procedure was produced.

First, the following materials were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
・ Black pigment 23 parts by weight ・ Polymer dispersant (Bicchemy Japan Co., Ltd. Disperbyk 111) 2 parts by weight ・ Solvent (diethylene glycol dimethyl ether) 75 parts by weight

Next, the following materials were stirred and mixed at room temperature to prepare a decorative part forming composition.
<Composition of composition for decorating part formation>
-61 parts by weight of the black pigment dispersion-20 parts by weight of the curable resin composition-30 parts by weight of diethylene glycol dimethyl ether

  The decorative part forming composition was applied on a 0.7 mm thick glass substrate (Asahi Glass Co., Ltd. AN material) with a spin coater and dried at 100 ° C. for 3 minutes to form a decorative layer having a thickness of about 1 μm. . The decorative layer is exposed to a light-shielding pattern (repetition of RGB with a 75 μm pitch stripe shape) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution. For 30 minutes, a heat treatment was applied to form a patterned decorative portion. The decorative member was obtained by the above procedure.

[Formation of bonding process, exposure process, transfer process and protective part]
In the same manner as in Example 1, an ultraviolet curable adhesive layer was formed on the surface of the decorative member on the decorative portion side.
By pasting the UV curable adhesive layer of the decorative member and the optical functional layer of the laminate for transfer so that air does not enter, and bonding, exposing and peeling in the same manner as in Example 1, The optical functional layer was transferred to the surface of the decorative member on the decorative part side. The base material for display apparatuses was obtained by the above process. In the same manner as in Example 1, a protective part was formed on the surface of the optical functional layer opposite to the ultraviolet curable adhesive layer.

[Example 3]
[Production of member to be transferred (touch panel)]
The touch panel which has the wiring layer and sensor electrode (2nd functional layer) which were formed on the transparent base material (transferred member) with the following procedure was produced.
A transparent substrate having a refractive index adjustment layer formed in the active area was prepared. A lead-out wiring and an external connection terminal (wiring layer) made of ITO were formed in a pattern by a photolithography method in a region corresponding to the non-display region of the display device on the transparent substrate. Next, a transparent electrode layer made of ITO was formed in a pattern on the refractive index adjustment layer in the active area by photolithography, and a sensor electrode having a first electrode and a second electrode and a second conductive portion were formed. . The thickness of the transparent electrode layer was 1300 mm. Next, an insulating layer was formed so as to cover the second conductive portion, and the first conductive portion was formed on the insulating layer.
Thus, a touch panel having a wiring layer, a sensor electrode, and the like was formed.

An ultraviolet curable adhesive layer was formed on the surface of the touch panel on the sensor electrode side in the same manner as in Example 1.
The UV curable adhesive layer of the touch panel and the optical functional layer of the laminate for transfer are bonded so as not to enter air, and bonded, exposed and peeled in the same manner as in Example 1 to The optical functional layer was transferred onto the surface on the sensor electrode or the like side. The base material for display apparatuses was obtained by the above process. In the same manner as in Example 1, a protective part was formed on the surface of the optical functional layer opposite to the ultraviolet curable adhesive layer.

[Comparative example]
A substrate for a display device was produced in the same manner as in Example 1 except that a 20 μm-thick pressure-sensitive adhesive layer was formed on the optical functional layer of the transfer laminate instead of the ultraviolet curable adhesive layer. Further, in the same manner as in Example 1, a protective part was formed on the surface of the optical functional layer opposite to the ultraviolet curable adhesive layer.

[Evaluation 1]
(Thickness)
In Example 1, compared with the comparative example, the adhesive layer could be made thinner, and a display device substrate having a smaller thickness could be produced.

(Heat-resistant)
The substrates for display devices of Examples 1 to 3 did not change in appearance before and after the formation of the protective part. On the other hand, a change in appearance (generation of stripes) was observed before and after the formation of the protective portion in the display device substrate of the comparative example. This is considered due to the fact that the ultraviolet curable adhesive layer has superior heat resistance as compared to the pressure-sensitive adhesive layer.

[Example 4]
The following color filter was used as the member to be transferred, and the following transfer laminate was used as the transfer laminate.

[Production of member to be transferred (color filter)]
On the carrier glass substrate, a polyimide precursor was applied as a transparent substrate-forming composition, and imidized by heat treatment to form a transparent substrate (polyimide substrate) (thickness: 10 μm). A color filter was obtained by forming a light-shielding part, a colored part and a protective layer on the obtained polyimide substrate in the same manner as in Example 1.

[Production of transfer laminate]
A PET film having a thickness of 100 μm was prepared as a transfer substrate. On the transfer substrate, the following composition for forming a hard coat layer was applied by gravure reverse coating so that the thickness after drying was 2 μm, and dried at 100 ° C. The dried coating film was cured by irradiating with ultraviolet rays using a high pressure mercury lamp to form a hard coat layer. The transfer laminate was obtained through the above steps.

<Composition for forming hard coat layer>
・ Iupimer UV V3031 (Mitsubishi Chemical Co., Ltd., UV curable resin product name) 25 parts by mass ・ Methacrylate oligomer (Nippon Gosei Kagaku Co., Ltd., trade name: Murasaki 1700B) 5 parts by mass Product name Irgacure 184) 0.9 parts by mass / solvent (ethyl acetate: methyl isobutyl ketone = 1: 1) 70 parts by mass

[Bonding process, exposure process, and transfer process]
An ultraviolet curable adhesive layer was formed on the colored portion side surface of the color filter in the same manner as in Example 1. By bonding the UV curable adhesive layer of the color filter and the hard coat layer of the transfer laminate so that air does not enter, and bonding, exposing and peeling in the same manner as in Example 1, the color The hard coat layer was transferred to the colored portion side surface of the filter. The base material for display apparatuses was obtained by the above process. For the color filter to which the hard coat layer has been transferred, the excimer laser light is focused on the interface between the polyimide and the carrier glass substrate from the carrier glass substrate side, thereby causing laser abrasion on a part of the polyimide interface surface, The carrier glass substrate was peeled off. Through the above steps, a display device member was obtained.

[Example 5]
The following sensor electrode substrate was used as the transfer member, and the transfer laminate of Example 4 was used as the transfer laminate. In the same manner as in Example 4, the hard coat layer was transferred to the surface on the sensor electrode side of the sensor electrode substrate using an ultraviolet curable adhesive layer. In the same manner as in Example 4, the carrier glass substrate was peeled from the sensor electrode substrate to which the hard coat layer was transferred. The base material for display apparatuses was obtained by the above process.

[Production of member to be transferred (sensor electrode base material)]
On the carrier glass substrate, a polyimide precursor was applied as a transparent substrate-forming composition, and imidized by heat treatment to form a transparent substrate (polyimide substrate) (thickness: 10 μm).
An anchor layer (thickness: 0.5 μm) composed of an acrylic resin was formed on the obtained polyimide substrate using a die coating method.
Next, a conductive layer made of a silver alloy was formed on the obtained anchor layer using a sputtering method, and then the conductive layer was etched using the resist pattern as a mask. Thereby, a mesh-shaped first sensor electrode (line width: 3 μm, thickness: 0.2 μm) was formed.
Next, an insulating layer (thickness: 1.5 μm) made of an acrylic resin was formed using a die coating method so as to cover the first sensor electrode.
Next, a second sensor electrode (line width: 3 μm, thickness: 0.2 μm) was formed on the insulating layer in the same manner as the first sensor electrode.
Finally, a protective layer (thickness: 1.5 μm) made of an acrylic resin was formed using a die coating method so as to cover the second sensor electrode. This obtained the sensor electrode base material.

[Example 6]
As the transfer member, the following sensor electrode substrate with color filter was used, and the transfer laminate of Example 4 was used as the transfer laminate. In the same manner as in Example 4, the hard coat layer was transferred to the colored portion side surface of the sensor electrode substrate with a color filter using an ultraviolet curable adhesive layer. In the same manner as in Example 4, the carrier glass substrate was peeled from the sensor electrode substrate with color filter to which the hard coat layer was transferred. The base material for display apparatuses was obtained by the above process.

[Production of member to be transferred (sensor electrode substrate with color filter)]
In the same manner as in Example 5, a sensor electrode substrate was produced. Next, a light-shielding layer (thickness: 1.5 μm) composed of an acrylic resin having coated carbon as a pigment was formed on the protective layer of the sensor electrode substrate using a die coating method. Then, the obtained light shielding layer was patterned using the photolithographic method, and the light shielding part (line width: 5 micrometers) was formed. A red colored part, a green colored part, and a blue colored part were formed in the opening of the light shielding part formed on the protective layer of the sensor electrode substrate. This formed the sensor electrode base material with a color filter.

[Example 7]
As the member to be transferred, the following decorative portion and the sensor electrode substrate with color filter were used, and the transfer laminate of Example 4 was used as the transfer laminate. In the same manner as in Example 4, the hard coat layer was transferred to the surface of the decorative portion and the colored portion side of the sensor electrode substrate with a color filter using an ultraviolet curable adhesive layer. Further, in the same manner as in Example 4, the carrier glass substrate was peeled off from the decorated portion to which the hard coat layer was transferred and the sensor electrode substrate with color filter. The base material for display apparatuses was obtained by the above process.

[Preparation of member to be transferred (sensor electrode substrate with decorative portion and color filter)]
In the same manner as in Example 5, a sensor electrode substrate was produced. Next, a light-shielding layer (thickness: 1.5 μm) composed of an acrylic resin having coated carbon as a pigment was formed on the protective layer of the sensor electrode substrate using a die coating method. Then, the obtained light shielding layer was patterned using the photolithographic method, and the light shielding part (line width: 5 micrometers) and the decorating part were formed. A red colored part, a green colored part, and a blue colored part were formed in the opening of the light shielding part formed on the protective layer of the sensor electrode substrate. Thereby, the decoration part and the sensor electrode base material with a color filter were formed.

[Evaluation 2]
(Bend resistance test)
A bending resistance test was performed on the display device members obtained in Examples 4 to 7. Measurement conditions in the flex resistance test are as follows.

<Measurement conditions>
Sample size: 200mm x 120mm, 150mm x 70mm
The test was performed by bending the sensor electrode substrate at 3 mmR in either the long side or the short side.
・ Bending radius R = 3mm
・ Rotation speed: 120rpm
・ Stroke: 20mm

  The transmittance change (%) of the display device members of Examples 4 to 7 after performing the bending test 200,000 times (transmittance before bending test (%) − transmittance after bending test (%)). When examined, it was confirmed that it was 10% or less. In the display device member after the bending test, there was almost no change in the visual transparency. Moreover, the damage of the base material of the member for display apparatuses after a bending test, the peeling of the functional layer, and the crack were not confirmed.

DESCRIPTION OF SYMBOLS 1 ... Transfer laminated body 2, 12 ... Transfer base material 3 ... Functional layer 4, 14 ... Transferred member 5, 15 ... Photocurable adhesive layer 10A, ... Functional layer-equipped member 33 ... Display device functional layer 10A1 ... Display device components

Claims (3)

A preparation step of preparing a transfer laminate having a transfer substrate and a functional layer formed on the transfer substrate;
An application step of forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material on at least a transferred member having a substrate;
A bonding step of bonding the photocurable adhesive layer and the functional layer of the transfer laminate;
Exposing the photocurable adhesive layer to cure the photocurable resin material and bonding the functional layer on the transferred member;
A transfer step of transferring the functional layer onto the member to be transferred by peeling off the transfer substrate of the transfer laminate;
The manufacturing method of the member with a functional layer characterized by having.   The method for producing a member with a functional layer according to claim 1, wherein the member to be transferred has a second functional layer formed on the substrate. Preparing a transfer laminate having a transfer substrate and a functional layer for a display device formed on the transfer substrate; and
An application step of forming a photocurable adhesive layer by applying an adhesive containing a photocurable resin material on at least a transferred member having a substrate;
A bonding step of bonding the photocurable adhesive layer and the display device functional layer of the transfer laminate;
Exposing the photocurable adhesive layer to cure the photocurable resin material and bonding the display device functional layer on the transferred member; and
A transfer step of transferring the display device functional layer onto the member to be transferred by peeling off the transfer substrate of the transfer laminate;
The manufacturing method of the member for display apparatuses characterized by having.

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