JP2016194578A - Light collecting member, window material with light controlling function, method for designing light collecting member, and method for forming light collecting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light collecting member with excellent light collecting properties that can be stably manufactured.SOLUTION: The light collecting member according to the present invention includes a substrate and a light controlling layer on a surface of the substrate, which has a resin light transmission part with a plurality of grooves in a surface and a light controlling part in the grooves, the resin light transmission part having a larger index of refraction than the light controlling part has and having a plastic deformation rate in a range from 86% to 96%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a daylighting member that has excellent daylighting properties and can be stably manufactured.

In recent years, along with the seriousness of environmental problems such as global warming, space temperature adjustment of houses, automobiles, etc. using daylighting members having a light control layer has been promoted for the purpose of energy saving and CO ₂ reduction.
A daylighting member is a function that adjusts the amount of incident heat rays and visible rays into the room by selectively absorbing, polarizing, reflecting, transmitting light, etc. according to the incident angle of external light such as sunlight. It is a sheet.

As the daylighting member, as shown in Patent Document 1, a member having a resin light transmitting portion having a groove portion as a light control layer and a low refractive index light control portion formed in the groove portion of the resin light transmitting portion. Are known.
As a method for forming a resin light transmitting portion, ionizing radiation is irradiated while pouring a composition for forming a light transmitting portion containing an ionizing radiation curable resin between a forming original plate having a convex portion corresponding to a groove portion and a substrate. Then, after being cured, a method of taking out the resin light transmission part from the shaping original plate is known.

JP 2014-126708 A

As a method of further improving the daylighting performance of the daylighting member described in Patent Document 1, a method of increasing the difference in refractive index between the resin light transmitting portion and the light control portion is conceivable. As a method of increasing the difference in refractive index, specifically, a method of forming a resin light transmitting portion using an ionizing radiation curable resin having a high refractive index can be mentioned.
However, when the resin light transmission part is formed using a high refractive index ionizing radiation curable resin, the resin light transmission part breaks due to the stress applied to the resin light transmission part when taking out from the shaping original plate, There is a problem that a resin light transmission part having a desired shape may not be obtained due to a problem such as deformation.
In addition, as a method for suppressing the stress applied to the resin light transmitting portion when taking out from the shaping original plate, for example, the amount of the release agent added to the light transmitting portion forming composition containing the ionizing radiation curable resin is increased. A method of improving the releasability from the shaping original plate is also conceivable, but there is a problem that the adhesiveness between the resin light transmitting portion and the substrate is lowered. As a result, when the resin light transmission part is peeled from the shaping original plate, the substrate may be peeled from the resin light transmission part, and the resin light transmission part may not be stably peeled from the shaping original plate. There is. Furthermore, there is a problem that long-term reliability is lowered, for example, the adhesiveness between the resin light transmitting portion and the base material is lowered during long-term use.

  This invention is made | formed in view of the said problem, and it aims at providing the lighting member which is excellent in daylighting property and can be manufactured stably.

  As a result of repeated researches to solve the above problems, the present inventors have adjusted the plastic deformation rate of the resin light transmission part, thereby causing defects such as cracking of the resin light transmission part when taking out from the shaping master. As a result, the present invention has been completed.

  That is, the present invention has a base material and a light control layer formed on one surface of the base material, and the light control layer has a resin light having a plurality of grooves on one surface. The resin light transmission part has a refractive index higher than that of the light control part, and the plastic light transmission part has a plastic deformation rate of 86% to 96. %, The daylighting member is provided.

According to the present invention, when the plastic deformation rate of the resin light transmission part is in the range of 86% to 96%, the composition for forming a light transmission part containing a high refractive index constituent material for the purpose of improving the daylighting property. Even when the resin light transmissive part is formed by transferring the uneven shape of the shaping original plate to a product, the resin light transmissive part is imparted without adding a large amount of a release agent to the light transmissive part forming composition. It can be stably removed from the mold master.
Therefore, the daylighting member can be excellent in daylighting and can be manufactured stably.

  In this invention, it is preferable that the refractive index of the said resin-made light transmission part is 1.58 or more. This is because when the refractive index of the resin light transmitting portion is 1.58 or more, the daylighting member can be made more excellent in daylighting performance.

  The present invention is a window material with a light control function having a pair of window materials and a daylighting member disposed via an adhesive layer between the pair of window materials, the daylighting member comprising a base material, A light control layer formed on one surface of the substrate, and the light control layer is formed in the resin light transmitting portion having a plurality of grooves on one surface and in the grooves. The resin light transmission portion has a higher refractive index than the light control portion, and the plastic deformation rate of the resin light transmission portion is in the range of 86% to 96%. A window material with a light control function is provided.

  According to the present invention, by using the above-described daylighting member, it is possible to make the window material with a light control function excellent in daylighting and low cost.

  The present invention has a base material and a light control layer formed on one surface of the base material, and the light control layer has a resin light transmission portion having a plurality of grooves on one surface. And the resin light transmission portion is a method for designing a daylighting member having a refractive index higher than that of the light control portion, and is a plastic deformation of the resin light transmission portion. Provided is a lighting member design method comprising a material selection step of selecting a constituent material of the resin light transmitting portion so that the rate is in a range of 86% to 96%.

According to the present invention, the material selecting step selects the constituent material of the resin light transmitting portion so that the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. Thus, even when a resin light transmission part is formed by transferring the concave / convex shape of the shaping original plate to a light transmission part forming composition containing a constituent material having a high refractive index, a large amount of the light transmission part forming composition is formed. The resin light transmitting portion can be stably taken out from the shaping original plate without adding a release agent.
Therefore, it is possible to easily design a daylighting member that is excellent in daylighting and can be stably manufactured.

  The present invention has a base material and a light control layer formed on one surface of the base material, and the light control layer has a resin light transmission portion having a plurality of grooves on one surface. And a light control part formed in the groove, wherein the resin light transmission part is a method of manufacturing a daylighting member having a refractive index higher than that of the light control part, and the plastic light transmission part is plastically deformed. A material selection step of selecting a constituent material of the resin light transmitting portion so that the rate is in a range of 86% to 96%, and the resin light using the constituent material selected in the material selection step. And a light transmission part forming step of forming a transmission part.

According to the present invention, the material selecting step selects the constituent material of the resin light transmitting portion so that the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. Thus, in the light transmitting part forming step, even when the resin light transmitting part is formed by transferring the concavo-convex shape of the molding original plate to the light transmitting part forming composition containing the constituent material having a high refractive index, the light transmitting part is formed. Without adding a large amount of a release agent to the part-forming composition, the resin light-transmitting part can be stably taken out from the shaping original plate.
Therefore, the daylighting member excellent in daylighting can be manufactured stably.

  The present invention has an effect of providing a daylighting member that is excellent in daylighting and can be stably manufactured.

It is a schematic sectional drawing which shows an example of the lighting member of this invention. It is the schematic perspective view and sectional drawing which show an example of the light control layer used for the lighting member of this invention. It is explanatory drawing for demonstrating the permeation | transmission path | route of the light in the lighting member of this invention. It is a schematic sectional drawing which shows an example of the longitudinal cross-sectional shape of the groove part in this invention. It is a schematic sectional drawing which shows an example of the window material with a light control function of this invention. It is a schematic sectional drawing which shows the other example of the window material with a light control function of this invention. It is a schematic perspective view which shows an example of the building of this invention. It is process drawing which shows an example of the manufacturing method of the lighting member of this invention.

The present invention relates to a daylighting member, a window material with a light control function using the same, a design method thereof, and a manufacturing method thereof.
Hereinafter, a daylighting member, a window material with a light control function, a daylighting member design method, and a daylighting member manufacturing method of the present invention will be described in detail.

A. Daylighting member The daylighting member of the present invention has a base material and a light control layer formed on one surface of the base material, and the light control layer has a plurality of grooves on one surface. The resin light transmissive part and the light control part formed in the groove part have a refractive index higher than that of the light control part, and the plastic light transmissive part has a plastic deformation rate of 86. It is characterized by being in the range of% to 96%.

Such a daylighting member of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic sectional view showing an example of a daylighting member of the present invention. FIG. 2A is a schematic perspective view showing an example of a light control unit used in the present invention, and FIG. 2B is a cross-sectional view taken along the line XX of FIG.
As shown in FIGS. 1 and 2, the daylighting member 10 of the present invention has a base material 1 and a light control layer 2 formed on one surface of the base material 1, and the light control layer described above. 2 includes a resin light transmission portion 11 having a plurality of groove portions 12 on one surface and a light control portion 13 formed in the groove portion 12, and the resin light transmission portion 11 includes the light control portion. The refractive index is higher than 13, and the plastic deformation rate of the resin light transmitting portion 11 is in the range of 86% to 96%.
FIG. 1 shows an example in which the daylighting member 10 has an adhesive layer 3 on the surface of the light control layer 2 opposite to the substrate 1.

According to the present invention, when the plastic deformation rate of the resin light transmission part is in the range of 86% to 96%, the composition for forming a light transmission part containing a high refractive index constituent material for the purpose of improving the daylighting property. Even when the resin light transmissive part is formed by transferring the uneven shape of the shaping original plate to a product, the resin light transmissive part is imparted without adding a large amount of a release agent to the light transmissive part forming composition. It can be stably taken out from the original mold.
Therefore, the daylighting member can be excellent in daylighting and can be manufactured stably.
Moreover, the lighting member can be made low-cost by being able to manufacture stably.
Furthermore, by eliminating the need for adding a large amount of release agent, it is possible to achieve excellent adhesion between the resin light transmission part and the base material, and even when the above daylighting member is used for a long period of time, It can be excellent in long-term reliability with little peeling of the light-transmitting part and the substrate.
Here, the reason why the resin light transmission part can be stably taken out from the shaping original plate by the plastic deformation rate of the resin light transmission part being in the range of 86% to 96% is as follows. It is guessed as follows.

That is, when the plastic deformation rate of the resin light transmission part is small and the elastic deformation ratio is large, the stress applied when taking out from the shaping master is stored in the resin light transmission part, and the resin light transmission part is caused by the stress. It will cause cohesive failure.
On the other hand, if the plastic deformation ratio of the resin light transmitting portion is large and the elastic deformation ratio is small, the resin light transmission of a desired shape is not restored after the shape is deformed by the stress when taking out from the shaping original plate. A transmission part cannot be obtained.
On the other hand, since the plastic deformation rate of the resin light transmission part is within the above range, most of the stress applied when taking out from the shaping original plate is converted into heat or the like, and the resin light transmission part It is possible to suppress the occurrence of cohesive failure or the like due to stress being stored in the film and to maintain a desired shape.
In addition, by eliminating the need for a large amount of release agent, it is possible to suppress a decrease in the adhesion between the resin light transmission part and the base material, and the resin light transmission part can be easily peeled off from the molding master together with the base material. It becomes possible to do.
Therefore, the resin light transmission part can be stably taken out from the shaping original plate.

FIG. 3 is an explanatory diagram for explaining a light transmission path in the daylighting member of the present invention. The reference numerals in FIG. 3 are the same as those described in FIG. 1 and FIG. Moreover, in FIG. 3, the shape of the said groove part is comprised by two straight lines of the 1st straight line 12a and the 2nd straight line 12b from the surface on the opposite side to the base material 1, and the other side surface of the hypotenuse of one side surface Shows an example of a tapered shape constituted by one straight line of the third straight line 12c.
As illustrated in FIG. 3, when the solar altitude is low, the incident angle θ of sunlight (L1) with respect to the window glass 100 is small, and the sunlight L1 is generated between the resin light transmission unit 11 and the light control unit 13. Of the boundary surface, a large amount of light is incident on the formation surface of the second straight line 12b. At this time, the visible light is refracted or totally reflected at the boundary surface between the resin light transmitting portion 11 and the light control portion 13 and taken into the room.
On the other hand, when the solar altitude is high, the incident angle θ of the sunlight L2 with respect to the window glass 100 increases, so that the sunlight L2 is the first of the boundary surfaces between the resin light transmission portion 11 and the light control portion 13. A large amount of light is incident on the formation surface of one straight line 12a. At this time, the visible light is refracted or totally reflected at the boundary surface between the resin light transmission portion 11 and the light control portion 13, and further refracted or totally reflected on the formation surface of the second straight line 12b as necessary. And taken into the room.
Moreover, also about groove parts other than the said shape, visible light can be taken in indoors by refracting or totally reflecting sunlight at the interface surface between the resin light transmission part 11 and the light control part 13.
Thus, the said lighting member can take in sunlight widely indoors from the case where the solar altitude is low to the case where it is high.

The daylighting member of the present invention has a base material and a light control layer.
Hereinafter, each structure in the lighting member of this invention is demonstrated.

1. Light Control Layer The light control layer in the present invention is formed on one surface of the substrate.
The light control layer has a resin light transmission part and a light control part.

(1) Resin light transmission part The resin light transmission part in this invention has a several groove part in one surface.
The resin light transmission part has a higher refractive index than the light control part.
The resin light transmission part has a plastic deformation rate in the range of 86% to 96%.

(A) Plastic deformation rate The plastic deformation rate of the resin light transmitting portion in the present invention is not particularly limited as long as it is within the range of 86% to 96%, and is suitable for the type and use of the daylighting member of the present invention. It is set accordingly.

Here, the plastic deformation rate is an average value of 10 measurement samples.
The plastic deformation rate conforms to ISO14577-1, and is determined by the ratio of Welast / Wtotal (Welast is plastic deformation work [N · m], Wtotal is total deformation work [N · m]). .
The condition of the load applied to measure the plastic deformation rate is as follows: an indenter maximum load of 10 mN (load speed of 0.5 mN / second, maximum load held for 5 seconds, dehumidification speed of 0.1 mm). 5 mN / sec) can be used.
The microhardness meter is not particularly limited as long as it can accurately load a load. For example, a picodenter HM500 manufactured by Fischer can be used. As the indenter, a Vickers indenter (face angle 136 ° regular pyramid) can be used.
The measurement sample is not particularly limited as long as the load can be accurately applied, but a portion where no groove is formed in the resin light transmission portion to be measured can be used.
The size of the resin light transmission part used as a measurement sample in plan view generally affects a hemisphere from the place where it is pushed in by an indenter, and is affected by a circular range having a radius 10 times the pushing depth. Therefore, it is possible to obtain a size including a circle having a radius of 10 times or more the maximum indentation depth when a load is applied to the indenter. The size in plan view is a square shape with a side of 100 μm or more so as to include a circle with a radius of 50 μm when the maximum indentation depth when a load is applied to the indenter is about 5 μm. For example, it can be a 1 cm square shape.
Further, the thickness of the measurement sample is generally considered to be affected by a range of 10 times the amount of deformation when it is pushed in with an indenter, so that the thickness can be 10 times or more the above amount of deformation. For example, when the maximum indentation depth when a load is applied to the indenter is about 5 μm, the thickness can be 50 μm or more.
Although the size and thickness of the measurement sample may be adjusted according to the load condition of the indenter, the load condition of the indenter can also be adjusted according to the size and thickness of the measurement sample. For example, when the size of the measurement sample is small, the load condition of the indenter can be made lower than the specific load condition described above according to the size.
The resin light transmission part used as the measurement sample may be one collected from the daylighting member, or may be prepared by using a resin light transmission part for measurement having the same composition and degree of cure.
The measurement can be performed by bonding the measurement sample to a glass plate via a double-sided tape and fixing the measurement sample so as to be the outermost layer.

The method for selecting the constituent material of the resin light transmitting portion is not particularly limited as long as it is a method capable of selecting a constituent material capable of setting the resin light transmitting portion to the above-described plastic deformation rate. Examples thereof include a method of appropriately selecting a resin material, a plasticizer, and the like that are contained as a main component of the constituent material.
Here, the plastic deformation of the resin light transmitting portion containing the resin material as the main component of the resin material is generally greatly influenced by the entangled structure of the resin material, and the molecular chain of the resin material slips against the stress. When the entanglement is unwound, plastic deformation occurs.
From such a viewpoint, it is preferable to use a method of selecting the resin material as a method of selecting the constituent material of the resin light transmitting portion.
In addition, as a selection method of the resin material, any selection method capable of adjusting the plastic deformation rate within a desired range may be used. For example, a cross-linked structure of the resin material, an interaction between polymer chains of the resin material, Examples thereof include a method of selecting from the viewpoint of the main chain skeleton of the resin material, the free volume of the resin material, and the like.
More specifically, when the resin material contains a cured product of an ionizing radiation curable resin, the selection method of the ionizing radiation curable resin for increasing the plastic deformation rate of the resin light transmitting portion includes the number of functional groups. Cured products with a soft main chain structure such as ionizing radiation curable resins having a methylene chain or a glycol chain, which can form a cured material with little cross-linking structure such as a few ionizing radiation curable resins, and having little interaction between molecular chains And those capable of forming a cured product having a large free volume of molecules, such as an ionizing radiation curable resin having a bulky functional group.

(B) Constituent material of resin light transmitting portion The constituent material of the resin light transmitting portion includes a resin material as a main component.
The resin material is not particularly limited as long as the resin material has a plastic deformation rate and can form a resin light transmission part having a higher refractive index than the light control part, but an ionizing radiation curable resin. It is preferable to contain the hardened | cured material of. When the resin material contains a cured product of an ionizing radiation curable resin, for example, for forming a light transmission part including the ionizing radiation curable resin between a shaping original plate having a convex portion corresponding to a groove and a substrate This is because the resin-made light transmitting portion having a desired shape can be easily formed by applying the composition and curing it while transferring the uneven shape of the shaping original plate to the composition for forming the light transmitting portion.
The ionizing radiation here refers to all ultraviolet rays (UV-A, UV-B, UV-C), visible light, γ-rays, X-rays, electron beams, active energy rays, and the like.

  Examples of the ionizing radiation curable resin include an ultraviolet curable resin, an electron beam curable resin, a visible light curable resin, and a near infrared curable resin. As the ionizing radiation curable resin, it is particularly preferable to use an ultraviolet curable resin and an electron beam curable resin.

The ultraviolet curable resin and the electron beam curable resin can be appropriately selected from conventionally used polymerizable monomers, polymerizable oligomers, and polymerizable prepolymers.
In the present invention, the ultraviolet curable resin and the electron beam curable resin may use any one of a polymerizable monomer, a polymerizable oligomer, and a polymerizable prepolymer, and a combination of two or more. It may be used.
For example, the ultraviolet curable resin and the electron beam curable resin may contain only the polymerizable monomer.

As the polymerizable monomer, a monofunctional monomer containing one polymerizable group or a polyfunctional monomer containing two or more polymerizable groups can be used. The polymerizable group is not particularly limited as long as it can be polymerized by ultraviolet rays or electron beams, and examples thereof include radically polymerizable unsaturated groups such as ethylenically unsaturated double bonds.
The polymerizable monomer may include at least one of the monofunctional monomer and the polyfunctional monomer, but preferably includes both the monofunctional monomer and the polyfunctional monomer from the viewpoint of adjusting the plastic deformation rate.

Examples of the monofunctional monomer include methyl (meth) acrylate, vinyl pyrrolidone, 2-phenoxyethyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, β-hydroxy (meth) acrylate, and tetrahydrofurfuryl (meth) acrylate. , M-phenoxybenzyl (meth) acrylate, o-phenylphenol ethylene oxide (EO) modified acrylate, paracumylphenol EO modified acrylate, lauryl acrylate, ethyl carbitol acrylate, 2,2,2-trifluoroethyl acrylate, 2, And monofunctional (meth) acrylates such as 2,3,3-tetrafluoropropyl acrylate.
Examples of the polyfunctional monomer include 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene, 2-hydroxy-3-acryloyloxypropyl methacrylate, polyethylene glycol di (meth) acrylate, and tetraethylene. Polyfunctional (meth) acrylates such as glycol di (meth) acrylate, nonanediol diacrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate .
The said polymerizable monomer may be used individually by 1 type, and may be used in combination of 2 or more type. (Meth) acrylate refers to acrylate or methacrylate.

  Examples of the polymerizable oligomer and prepolymer include oligomers and prepolymers having radically polymerizable unsaturated groups in the molecule, such as epoxy (meth) acrylate, urethane (meth) acrylate, and polyether urethane (meth). Modifications such as acrylate, caprolactone urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate oligomers and prepolymers, ethylene oxide (EO) modification, propylene oxide (PO) modification, propoxylated ethoxylation, etc. Examples thereof include bisphenol A di (meth) acrylate. These may be used alone or in combination of two or more.

In the present invention, from the viewpoint of increasing the difference in refractive index between the resin light transmitting portion and the light control portion, the ultraviolet curable resin and the electron beam curable resin are aromatic curable ultraviolet curable resins. And an electron beam curable resin. This is because the refractive index of the resin light transmission portion can be increased.
Specifically, examples of the ultraviolet curable resin and the electron beam curable resin containing aromatics include polymerizable monomers, oligomers and prepolymers containing aromatics.
Specific examples of the polymerizable monomer containing an aromatic group include 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene, m-phenoxybenzyl (meth) acrylate, and o-phenylphenol ethylene oxide. Examples thereof include polymerizable monomers containing aromatics such as (EO) -modified acrylate, paracumylphenol EO-modified acrylate, and 2-phenoxyethyl (meth) acrylate.
The said ultraviolet curable resin and electron beam curable resin containing an aromatic may be used individually by 1 type, and may be used in combination of 2 or more type.

The resin material is contained as a main component of the constituent material of the resin light transmitting portion.
Here, “contained as a main component of the constituent material of the resin light transmitting portion” means that the content of the resin material in the resin light transmitting portion is 70% by mass or more. .
In the present invention, the content is preferably 90% by mass or more, and more preferably 95% by mass or more. It is because the plastic deformation rate can be easily adjusted when the content is within the above-described range.
In addition, since it is so preferable that the said content is large, since it is preferable, it is not specifically limited, From a viewpoint of the ease of formation of the said resin light transmission part, the request | requirement of provision of another function, etc., it is 99 mass% or less normally.

  When the resin material contains a cured product of the ionizing radiation curable resin, the content of the cured product of the ionizing radiation curable resin in the resin material may satisfy the plastic deformation rate. Although not particularly limited, it is preferably 50% by mass or more, more preferably 80% by mass or more, particularly 100% by mass, that is, the resin material included in the resin light control unit. Is preferably a cured product of an ionizing radiation curable resin contained in the composition for forming a light transmitting part used for forming the resin light transmitting part. It is because the plastic deformation rate can be easily adjusted when the content is within the above-described range.

  When a cured product of an ultraviolet curable resin is contained as a constituent material of the resin light transmission part, it is preferable to use a photopolymerization initiator in combination. As the type of the photopolymerization initiator, those conventionally used can be used. As a content rate of the photoinitiator in the said resin-made light transmission part, it is preferable to exist in the range of about 0.1-5 mass parts with respect to 100 mass parts of ultraviolet curable resin.

  In addition to the cured product of the ionizing radiation curable resin, the resin material can include, for example, a thermoplastic resin such as polymethyl methacrylate (PMMA) or a cured product of a thermosetting resin such as an epoxy resin. . That is, the composition for forming a light transmission part can include the thermosetting resin before curing and the like.

  The resin light transmission part may contain any additive in addition to the above-described materials. As an arbitrary additive, a mold release agent, a polymerization inhibitor, a crosslinking agent, antioxidant, a plasticizer, an antifoamer, a filler, a ultraviolet absorber etc. are mentioned, for example.

The release agent is not particularly limited as long as it can stably peel the resin light transmitting part from the shaping original plate, but is not limited to silicone, fluorine, phosphate ester Is mentioned. Of these, phosphate ester type is preferable. As phosphoric acid ester compounds, commercially available, STEPEL ZelecUN, Johoku Chemical Industry's JP series, Toho Chemical Industries' phosphanol series, Daihachi Chemical Industry's AP, DP series, etc. Can be mentioned.
The content of the release agent is not particularly limited as long as the resin light transmission part can be stably peeled from the shaping original plate. The content in the part is preferably within a range of 0.01% by mass to 5% by mass, and particularly preferably within a range of 0.1% by mass to 1% by mass. This is because when the content of the release agent is within the above-described range, the resin light-transmitting portion can be excellent in adhesion to the substrate.

The optional additive may contain high refractive index fine particles for the purpose of making the refractive index of the resin light transmission portion larger than that of the light control portion.
The high refractive index fine particles may be fine particles having a refractive index higher than that of the light control unit, and include titanium oxide, zirconium oxide, cerium oxide, tin oxide, antimony tin oxide, indium tin oxide, phosphorus tin compound, five Examples thereof include high refractive index inorganic fine particles such as antimony oxide, aluminum zinc oxide, gallium zinc oxide and zinc antimonate.

The average primary particle size of the high refractive index fine particles can be in the range of 5 nm to 100 nm.
In addition, the said average primary particle diameter can be calculated | required by the method of measuring the magnitude | size of a primary particle directly from an electron micrograph. Specifically, a particle image was measured with a transmission electron micrograph (TEM) (for example, H-7650 manufactured by Hitachi High-Tech), and the average value of the length of the longest part of 100 randomly selected primary particles was calculated. The average primary particle size can be obtained. The same result can be obtained regardless of whether the electron microscope is a transmission type (TEM) or a scanning type (SEM).

  The content of the high refractive index fine particles is preferably as small as possible from the viewpoint of more effectively exhibiting the effect of the present invention that it can be stably manufactured, and in the resin light transmitting portion. It is preferably 0% by mass. This is because, when the content is in the above-described range, the shaping original plate is less worn and the light transmitting part forming composition can be excellent in stability. Moreover, it is because the said resin-made light transmission part can be made excellent in transparency.

(C) Groove portion The longitudinal cross-sectional shape of the groove portion is not particularly limited as long as a desired daylighting property can be obtained. For example, a triangular shape, a square shape, a rectangular shape, a trapezoid shape, or an oblique side of at least one side surface is provided. Examples thereof include a taper shape constituted by two or more straight lines or curves, and a shape having four curves. Moreover, the corner | angular part of a groove part may have a curvature, and also the side of the side surface which comprises the said longitudinal cross-sectional shape may be a straight line, and may be a curve. 4 is a schematic cross-sectional view showing an example of the vertical cross-sectional shape of the groove, FIG. 4A is a trapezoidal shape, and FIG. FIG. 4C shows an example of a groove portion having a triangular shape with a curvature at the corner, and FIG. 4D shows an oblique side of one side surface from the surface opposite to the substrate 1. An example is shown in which the first straight line 12a and the second straight line 12b are configured by two straight lines, and the other side surface is a tapered shape configured by one straight line of the third straight line 12c.
In addition, with respect to the daylighting member in which the shape of the groove portion is the tapered shape in FIG. 4D described above, sunlight (L1 or L2) is the base material 1 of the light control layer 2 as shown in FIG. When the light is incident from the opposite surface, the daylighting member 10 is usually arranged and used so that the third straight line 12c side of the groove 12 is the ground surface side.

  The shape of the groove portion in plan view is not particularly limited as long as a desired daylighting property can be obtained. For example, the groove portion may be linear or may be a curve or the like. Furthermore, the arrangement of the groove portions in plan view may be arranged in parallel, arranged in parallel, or randomly arranged in the other direction. In particular, as shown in FIG. 2A, it is preferable that the groove portions are linearly arranged in parallel in a plan view.

  The height of the groove is not particularly limited as long as a desired daylighting property can be obtained. For example, the height is preferably in the range of 10 μm to 300 μm, and more preferably in the range of 25 μm to 250 μm. In particular, it is preferable to be in the range of 50 μm to 200 μm. Further, the height of the groove portion is in the range of 30% to less than 100% of the thickness of the resin light transmission portion, in particular in the range of 40% to 97.5%, particularly in the range of 50% to 95%. Is preferred. If the height of the groove is not within the above range, the thickness of the daylighting member of the present invention may be relatively increased and the flexibility may be inferior. The height of the groove portion is a portion indicated by T2 in FIG.

The width of the groove is not particularly limited as long as a desired daylighting property can be obtained. For example, the width of the groove is within a range of 5 μm to 50 μm, particularly within a range of 7 μm to 45 μm, and particularly within a range of 10 μm to 40 μm. It is preferable that This is because, when the width of the groove is within the above-described range, visible light can be excellent in transmittance as a whole daylighting member, and excellent in daylighting property.
The width of the groove portion refers to the widest portion in the longitudinal sectional shape of the groove portion, for example, a portion indicated by W in FIG.

  The ratio of the height to the width of the groove (T2 / W) is not particularly limited as long as the desired daylighting property can be obtained, and is preferably in the range of 1 to 10, for example. Especially, it is preferable to exist in the range of 2-8, and it is preferable to exist in the range of 3-7 especially. This is because when the ratio is within the above-described range, the daylighting property can be improved.

The pitch width of the groove is not particularly limited as long as a desired daylighting property can be obtained, but it is within a range of 15 μm to 200 μm, especially within a range of 20 μm to 150 μm, particularly within a range of 25 μm to 100 μm. It is preferable that When the pitch width is larger than the above range, it is difficult for outside light having a large incident angle to enter the light control unit, and the function by the light control unit may not be sufficiently performed. This is because it may be difficult to transmit visible light through the resin light transmission portion.
Note that the pitch width of the light control units refers to the distance between the centers of adjacent light control units, and is, for example, a portion indicated by P in FIG.

The groove portion is composed of two straight lines, the first straight line and the second straight line, from the surface opposite to the base material on the one side, and the other side is a single straight line having the third straight line. When the taper shape is configured by the above, the angle between the first straight line, the second straight line, and the third straight line and the surface of the resin light transmitting portion opposite to the base material is desired. There is no particular limitation as long as the daylighting property can be obtained.
The angle formed by the first straight line and the surface of the resin light transmitting portion opposite to the base material (hereinafter sometimes referred to as the first angle) is, for example, 10 ° to 90 °. It is preferable to be within the range, and it is particularly preferable to be within the range of 30 ° to 90 °, and it is particularly preferable to be within the range of 45 ° to 85 °. This is because, when the angle is within the above range, the daylighting member can be excellent in daylighting.
The angle formed between the second straight line and the surface of the resin light transmitting portion opposite to the base (hereinafter sometimes referred to as a second angle) is, for example, 10 ° to 90 °. It is preferably within the range, and in particular, it is preferably within the range of 30 ° to 90 °, and particularly preferably within the range of 45 ° to 90 °. This is because, when the angle is within the above range, the daylighting member can be excellent in daylighting.
The angle formed by the third straight line and the surface of the resin light transmission part opposite to the base material (hereinafter sometimes referred to as a third angle) is, for example, 90 ° to 175 °. It is preferable to be within the range, and it is particularly preferable to be within the range of 90 ° to 150 °, and it is particularly preferable to be within the range of 90 ° to 135 °. This is because, when the angle is within the above range, the daylighting member can be excellent in daylighting.
The first angle and the second angle are preferably such that the second angle is larger than the first angle. This is because the daylighting member can be excellent in daylighting performance.
The first straight line, the second straight line, and the third straight line are specifically shown by 12a, 12b, and 12c in FIG. 4D, and the first angle Specifically, the second angle and the third angle are indicated by θ1, θ2, and θ3 in FIG. 4D.

  The length of the groove is appropriately selected according to the desired size of the daylighting member. The length of the light control unit refers to the length in the longitudinal direction in plan view.

(D) Light transmission part made of resin The thickness of the light transmission part made of resin is appropriately selected according to the height of the groove part, but is preferably in the range of 10 μm to 300 μm, for example, 25 μm. It is preferably in the range of ˜250 μm, particularly preferably in the range of 50 μm to 200 μm. When the thickness of the resin light transmission portion is larger than the above range, the incident light is absorbed in the resin light transmission portion, thereby reducing the amount of light emitted to the indoor side, and the visibility of the daylighting member of the present invention is reduced. On the other hand, if it is smaller than the above range, it may be difficult to make the groove part into a desired shape.
In addition, the thickness of the said resin light transmission part is a part shown by T1 in FIG.2 (b).

The refractive index of the resin light transmission part is not particularly limited as long as it is larger than the light control part, but is preferably in the range of 1.50 to 1.80, for example. It is preferably in the range of 1.55 to 1.70, particularly preferably 1.58 or more, and particularly preferably in the range of 1.58 to 1.65.
The refractive index of the resin light transmission part was measured under the condition of a temperature of 20 ° C. using an Abbe refractometer (manufactured by Atago Co., Ltd.) according to the refractive index measurement method defined in JIS K7142. It is a value measured using a sodium light source having a wavelength of 589 nm. The refractive index measurement method in the following description is measured by this method.

The resin light transmission part has a higher refractive index than the light control part.
The difference in refractive index between the resin light transmitting portion and the light control portion is not particularly limited as long as it is greater than 0 and can obtain desired lighting properties.
The difference in refractive index is preferably in the range of 0.01 to 0.3, and more preferably in the range of 0.05 to 0.2. This is because when the difference in refractive index is within the above-described range, it is possible to improve the daylighting property.

The visible light transmittance of the resin light transmission part is preferably 70% or more, more preferably 80% or more, and particularly preferably 85% or more. Since the resin light transmission part has the visible light transmittance described above, a decrease in the amount of light emitted to the indoor side due to absorption of incident light in the resin light transmission part is suppressed, and the visibility of the lighting member of the present invention is improved. Can be made.
Note that the visible light transmittance is calculated using a calculation formula stipulated in the same standard by measuring the spectral transmittance in the wavelength range of 380 nm to 780 nm according to JIS A5759-2008 using an infrared visible ultraviolet spectrophotometer. Can be obtained.
As said infrared visible ultraviolet spectrophotometer, Shimadzu Corporation UV3100PC etc. can be used, for example.

(2) Light control part The light control part in this invention is formed in the said groove part. That is, the light control part and the groove part usually have the same shape. Further, the light control unit can select the function according to the constituent material.

The light control unit may be made of a transparent resin having a refractive index lower than that of the resin light transmission unit. The ultraviolet curable resin and the electron beam described in the section “(1) Resin light transmission unit” above. A curable resin can be used.
In the present invention, in particular, from the viewpoint of reducing the refractive index of the light control unit and increasing the difference in refractive index between the resin light transmission unit and the light control unit, It is preferable that the ultraviolet curable resin and the electron beam curable resin used as the material include an ultraviolet curable resin and an electron beam curable resin that do not contain aromatics.

  Moreover, when using an ultraviolet curable resin as a material of a light control part, it is preferable to use a photoinitiator together. As the type of the photopolymerization initiator, those conventionally used can be used. As a content rate of a photoinitiator, it is preferable to exist in the range of about 0.1 mass part-10 mass parts with respect to 100 mass parts of ultraviolet curable resin.

  The light control unit may include other arbitrary materials.

  The refractive index of the light control unit may be lower than the refractive index of the resin light transmission unit, and is preferably in the range of 1.40 to 1.55, for example.

  The light control unit preferably has a desired visible light transmittance. Specifically, since the visible light transmittance of the light control unit is the same as the visible light transmittance of the resin light transmission unit described above, description thereof is omitted here.

(3) Light Control Layer The surface including the light control part of the light control layer may be flat or uneven, and can be appropriately selected according to the function of the light control layer. For example, in the case of a daylighting member that requires high visibility, the surface is preferably flat, and the average surface roughness (Ra) is in the range of 0.1 nm to 100 nm, particularly in the range of 0.1 nm to 20 nm. In particular, the thickness is preferably in the range of 0.1 nm to 10 nm.
In the case where the surface has irregularities, there is a bias in the diffusion of light on the incident surface or the exit surface between the region where the incident surface or exit surface of the external light is flat and the region where the surface is concave or convex. For this reason, when the quantity of emitted light is biased to induce a light diffraction phenomenon and an interference phenomenon, a multiple image appears on the daylighting member, and visibility may be lowered.
The average surface roughness (Ra) is measured in a measurement environment of 23 ° C. in accordance with the provisions of JIS B0601 2001, and only the reference length is extracted from the roughness curve in the direction of the average line. When the X axis is taken in the direction of Y, the Y axis is taken in the direction of the vertical magnification, and the roughness curve is represented by y = f (x), the value can be calculated by the following equation (1).

A method for forming the light control layer is not particularly limited as long as it is a method capable of forming a light transmission portion made of resin having a plurality of groove portions of a desired shape on the surface and forming the light control portion in the groove portions. .
As a method for forming such a light control layer, the method described in the section of “E.

2. Base material The base material in this invention supports the said light control layer.
The said base material is formed in the surface on the opposite side to the surface in which the groove part was provided among the surfaces of a light control layer.

  The substrate is not particularly limited as long as it has light transparency and does not adversely affect visibility. For example, a sheet or film made of a resin having transparency can be used. preferable.

  The resin used for the substrate may be any resin that has transparency and can support the light control layer and the like. Examples of the resin include polyethylene terephthalate, polycarbonate, polyester, polyurethane, polyvinyl alcohol, polycarbonate, vinyl chloride, fluororesin, and rubber. Among these, from the viewpoints of transparency and strength, the resin is preferably polyethylene terephthalate or polycarbonate. Further, the base material may contain an antioxidant, an ultraviolet absorber and the like.

  The substrate may be subjected to surface treatment or the like on one side or both sides as necessary. Surface treatments include corona discharge treatment, chromic acid treatment (wet), flame treatment, hot air treatment, surface treatment by oxidation methods such as ozone ultraviolet irradiation treatment, surface treatment by roughening methods such as sandblasting and solvent treatment methods, chemical treatment Surface treatment and the like.

  The film thickness of the substrate can be appropriately set according to the use, but is usually within the range of 5 μm to 200 μm, and preferably within the range of 10 μm to 150 μm. If the film thickness of the substrate is smaller than the above range, curls, wrinkles and the like are likely to enter, and the strength of the daylighting member may not be obtained.

3. Other Configurations The daylighting member of the present invention has at least the base material and the light control layer described above, but may have other parts. Examples of other parts include a protective layer and an adhesive layer.
Hereinafter, each part will be described.

(1) Protective layer The daylighting member of the present invention preferably has a protective layer from the viewpoints of weather resistance and scratch resistance. Examples of the protective layer include a weather resistant layer, a hard coat layer, a weather resistant hard coat layer, and a self-cleaning layer.
The protective layer may be used as a haze layer. As said haze layer, it can be set as the external haze layer to which a haze is provided by surface unevenness | corrugation, the internal haze layer to which a haze is provided by an internal filler, etc.
The haze value of the haze layer is preferably in the range of 30% to 80%. This is because when the haze value is within the above range, both the antiglare property and the daylighting property can be excellent.
In addition, the said haze value can be measured by the method based on JISK7136 using a haze meter. As the haze meter, for example, product number HM-150 manufactured by Murakami Color Research Laboratory can be used.

As a material for the protective layer, an ionizing radiation curable resin is preferably used. The ionizing radiation curable resin can be appropriately selected from a polymerizable oligomer or prepolymer, and among them, a polyfunctional polymerizable oligomer or prepolymer is preferably used. Examples of the polymerizable oligomer or prepolymer include oligomers and prepolymers having radically polymerizable unsaturated groups in the molecule, such as epoxy (meth) acrylate, urethane (meth) acrylate, and polyether urethane (meth) acrylate. And caprolactone-based urethane (meth) acrylate, polyester (meth) acrylate-based, polyether (meth) acrylate-based oligomers and prepolymers, etc., especially polyfunctional urethane (meth) acrylate-based It is preferable in terms of achieving both hard coat properties, and the weight average molecular weight is preferably about 1000 to 5000.
Here, (meth) acrylate refers to acrylate or methacrylate.

  In addition to the above polyfunctional polymerizable oligomer, the ionizing radiation curable resin includes a caprolactone urethane (meth) acrylate obtained by a reaction of a caprolactone polyol, an organic isocyanate and a hydroxy acrylate, and a polybutadiene oligomer side. A polymer urethane (meth) acrylate such as a highly hydrophobic polybutadiene (meth) acrylate having a (meth) acrylate group in the chain can be used in combination. It is because the weather resistance of a protective layer can be improved by using together. In particular, the ionizing radiation curable resin preferably uses a caprolactone-based material in addition to the polyfunctional polymerizable oligomer described above.

When a polyfunctional urethane (meth) acrylate is used as the material for the protective layer, a diluent such as a monofunctional (meth) acrylate such as methyl (meth) acrylate is used for the purpose of adjusting the viscosity. Can be used in combination. The monofunctional (meth) acrylate may be used alone or in combination of two or more, or a low molecular weight polyfunctional (meth) acrylate may be used in combination. Moreover, as a diluent, applicability | paintability can also be ensured using said monomer.
The protective layer material can contain an ultraviolet absorber, a light stabilizer, a scratch-resistant filler, and the like.

  The thickness of the protective layer is preferably in the range of 0.1 μm to 20 μm, more preferably in the range of 0.5 μm to 10 μm, and particularly preferably in the range of 1 μm to 8 μm. .

  The position where the protective layer is disposed is appropriately selected according to the application mode of the daylighting member of the present invention, and when the daylighting member of the present invention is attached to an adherend such as a window glass, It arrange | positions so that it may become the outermost layer of the said lighting member with respect to a to-be-adhered body.

(2) Adhesive layer The daylighting member of the present invention preferably has an adhesive layer having light weather resistance in order to stick to an adherend such as a window glass.
The material of the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer is not particularly limited as long as it has light weather resistance. For example, acrylic, urethane, silicon, rubber-based pressure-sensitive adhesives can be used. Among the above materials, it is preferable to use an acrylic pressure-sensitive adhesive mainly composed of a polymer or copolymer of an acrylic monomer such as an acrylic ester or a methacrylic ester, as a material having light resistance. It is preferable to use n-butyl acrylate, 2-ethylhexyl acrylate, or the like.

  Moreover, it is preferable that the said adhesion layer contains the ultraviolet absorber. It is because the light weather resistance of an adhesion layer can be improved by containing a ultraviolet absorber. The ultraviolet absorber may be either inorganic or organic, and an ultraviolet absorber having a reactive group in the molecule can also be used. As the inorganic ultraviolet absorber, titanium oxide, cerium oxide, zinc oxide or the like having an average particle diameter of about 5 to 120 nm can be preferably used. Moreover, as an organic type ultraviolet absorber, a benzotriazole type, a triazine type, a benzophenone type, a salicylate type, an acrylonitrile type etc. can be mentioned preferably, for example. Among these organic ultraviolet absorbers, triazines are particularly preferable because they have a high ability to absorb ultraviolet rays and hardly deteriorate against high energy such as ultraviolet rays.

  As content of the ultraviolet absorber in the said adhesion layer, it is preferable to exist in the range of 0.1 mass part-25 mass parts with respect to 100 mass parts of adhesives, Especially the range of 1 mass part-25 mass parts is preferable. It is preferably within the range, and particularly preferably within the range of 3 parts by mass to 20 parts by mass.

  Moreover, the said adhesion layer may contain the light stabilizer etc. This is because the weather resistance of the adhesive layer can be improved. The light stabilizer is preferably a hindered amine light stabilizer or the like, and may have a reactive group in the molecule. Examples of the light stabilizer include 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, and bis (1,2 , 2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, 2,4-bis [N-butyl-N- (1- Cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl) amino] -6- (2-hydroxyethylamine) -1,3,5-triazine and the like.

  As content of the light stabilizer in the said adhesion layer, it is preferable to exist in the range of 0.05 mass part-7 mass parts with respect to 100 mass parts of adhesives, Especially 0.5 mass part-5 mass parts are preferable. It is more preferable to be within the range, and it is particularly preferable to be within the range of 1 to 5 parts by mass.

  The position where the pressure-sensitive adhesive layer is formed can be appropriately selected according to the usage mode of the daylighting member of the present invention. For example, when using the said daylighting member for internal sticking, it is preferable to form on the surface of the resin light transmission part including the surface of a light control part. On the other hand, when using the said daylighting member for external sticking, it is preferable to form on a base material. The thickness of the adhesive layer is preferably in the range of 5 μm to 100 μm, and more preferably in the range of 10 μm to 75 μm.

The adhesive layer is prepared by, for example, diluting the material of the adhesive layer described above with a solvent such as ethyl acetate or toluene to prepare a coating solution having a solid content of 20% by mass to 60% by mass, and applying the coating solution to a release sheet or the like. A thing can be formed by sticking to the surface which has a resin-made light transmission part.
In the above-described forming method, as a method of applying the coating solution for the adhesive layer, for example, a knife coater, a comma coater, a gravure coater, a roll coater or the like can be used. In the case of using the coating method, the coating amount of the material of the adhesive layer is in the range of ^10g / ^{m 2 ~30g} / m 2 is preferable in dry weight. By setting it within the above range, sufficient adhesion to the adherend can be obtained, and no sticking layer sticks out during processing.

(3) Others In addition to the above-described portions, for example, a planarizing layer, a scattering layer, or the like may be provided on the surfaces of the light control unit and the resin light transmission unit. This is because it is possible to suppress the occurrence of the light diffraction phenomenon and the light interference phenomenon on the surface of the daylighting member, and to prevent the visibility from being lowered due to the appearance of multiple images.

4). Daylighting member The visible light transmittance of the daylighting member of the present invention is preferably 65% or more, more preferably 70% or more, and more preferably 85% when the incident angle of external light is 0 °. The above is preferable. By making the visible light transmittance within the above range when the incident angle of external light is 0 °, the appearance and the like can be clearly observed. In addition, since the amount of visible light taken into the room or the like increases, the illuminance in the room can be secured by using outside light. The incident angle of external light here refers to the angle θ shown in FIG.
In addition, since the measuring method of the visible light transmittance can be the same as the measuring method described in the section of “1. Light control layer”, the description is omitted here.

  As a usage mode of the daylighting member of the present invention, it is preferable that the side on which the groove portion of the light control layer is formed is disposed on the light source side of external light. This is because the effect of the present invention is more exhibited.

B. Next, the window material with a light control function of the present invention will be described.
The window material with a light control function of the present invention is a window material with a light control function having a daylighting member and a window material disposed on at least one surface of the daylighting member, wherein the daylighting member is a base material And a light control layer formed on one surface of the substrate, and the light control layer is formed in a resin light transmitting portion having a plurality of grooves on one surface and in the grooves. The resin light transmissive portion has a higher refractive index than the light control portion, and the plastic deformation rate of the resin light transmissive portion is in the range of 86% to 96%. It is a feature.

Such a window material with a light control function of the present invention will be described with reference to the drawings.
FIG. 5 is a schematic cross-sectional view showing an example of the window material with a light control function of the present invention.
FIG. 6 is a schematic sectional view showing another example of the window material with a light control function of the present invention.
As shown in FIGS. 5 and 6, the window member 20 with a light control function of the present invention includes a daylighting member 10 and a window member 21 disposed on at least one surface of the daylighting member 10. The daylighting member 10 has a base material 1 and a light control layer 2 formed on the base material 1, and the light control layer 2 is a resin having a plurality of grooves on one surface. A light control part formed in the groove part, and the resin light transmission part has a higher refractive index than the light control part, and the plastic deformation ratio of the resin light transmission part is 86%. It is in the range of -96%.
In this example, the daylighting member 10 is bonded to the window material 21 via the adhesive layer 22. FIG. 5 shows an example in which the window member 21 is disposed only on one side of the daylighting member 10 via the adhesive layer 22 and the window member 21 is disposed only on one surface of the daylighting member 10. FIG. 6 includes a pair of window members 21 and a daylighting member 10 disposed between the pair of window members 21 via an adhesive layer 22. The daylighting members 10 are disposed on both sides of the daylighting member 10. An example having a window material 21 is shown.
5 and FIG. 6 indicate the same members as those in FIG. 1, and a description thereof will be omitted here.

  According to the present invention, by using the above-described daylighting member, the window material with a light control function can be excellent in daylighting performance and reliability.

The window material with a light control function of the present invention includes an aspect (first embodiment) having a window material disposed on only one side of a lighting member via an adhesive layer, a pair of window materials, and the pair of window materials. It can be divided into two modes: a mode (second embodiment) having a daylighting member disposed between them with an adhesive layer interposed therebetween.
Hereinafter, the description will be made separately for each aspect.

1. First Embodiment First, a first embodiment of the window material with a light control function of the present invention will be described.
The window material with a light control function of this aspect is the above-described window material with a light control function, and has a window material arranged on only one side of the daylighting member via an adhesive layer.

  Such a window material with a light control function of this aspect can be the one shown in FIG.

The window material with a light control function of this aspect has a window material, a daylighting member, and an adhesive layer.
Hereafter, each structure of the window material with a light control function of this aspect is demonstrated in detail.

(1) Daylighting member The daylighting member in this aspect has a base material and the light control layer formed on one surface of the said base material, and the said light control layer has two or more on one surface. It has a resin light transmission part having a groove part and a light control part formed in the groove part, and the resin light transmission part has a higher refractive index than the light control part, and plastic deformation of the resin light transmission part The rate is within the range of 86% to 96%.
Since such a daylighting member has the same content as that described in the above-mentioned section “A. Daylighting member”, description thereof is omitted here.

(2) Window material The window material in this embodiment is not particularly limited as long as it is generally used, and may be colorless or colored. Especially in this aspect, it is preferable that the said window material has a light transmittance and is colorless. Examples of such window materials include acrylic plates, polycarbonate plates, and glass plates.

  The thickness of the window material is appropriately adjusted according to the size and application of the window material with a light control function of this aspect, but is preferably in the range of 1 μm to 15 mm, for example, 3 μm to It is preferably within a range of 12 mm. It is because it can be set as the window material with a light control function which has desired transparency and mechanical strength because the thickness of a window material is in the said range.

  The window material may have irregularities on the surface like frosted glass or frosted glass, and may contain a wire inside like meshed glass.

(3) Adhesive layer In this aspect, a window material is arrange | positioned through the adhesive layer only on the single side | surface of a lighting member.
Such an adhesive layer is not particularly limited as long as it can stably adhere the daylighting member and the window material. For example, the adhesive layer is the same as the adhesive layer described in the above section “A. Daylighting member”. It can be. That is, the window material with a light control function of this aspect can be obtained by attaching a daylighting member having an adhesive layer to the window material.
In addition, as the adhesive used for the adhesive layer, thermoplastic resins such as ethylene-vinyl acetate copolymer resin (EVA) and polyvinyl butyral resin (PVB), and thermosetting resins obtained by adding a crosslinking material to the thermoplastic resin may be used. it can.
The adhesive layer can be used by laminating one or more of the pressure-sensitive adhesive and adhesive. Specifically, when two types of the above-mentioned adhesives are laminated and used, the layer structure of the window material with a light control function of this aspect is the lighting member / first adhesive layer (PVB) / second adhesive layer. (EVA) / configuration of window material and the like.
Moreover, the said contact bonding layer can contain a ultraviolet absorber, a light stabilizer, etc. as needed.
In addition, about the said ultraviolet absorber and light stabilizer, and those content, it is the same as that of the content as described in the item of "(2) Adhesive layer" of "3. Other composition" of the above-mentioned "A. Daylighting member." can do.

(4) Window material with light control function The window material with light control function of this aspect includes the window material, the daylighting member, and the adhesive layer, but has other configurations as necessary. May be.

The window material with a light control function of this aspect preferably has a predetermined light transmittance.
Specifically, the total light transmittance of the window material with a light control function is preferably 50% or more, more preferably 60% or more, particularly preferably 70% or more, and 80% or more. It is more preferable that Since the window material with a light control function has the above-described light transmittance, the transparency of the window material with a light control function of this aspect is improved, and it is possible to maintain a good design, and the practicality becomes extremely high. .
In addition, about a total light transmittance, it can measure according to prescription | regulation of JISK7375.

The manufacturing method of the window material with a light control function of this aspect will not be specifically limited if it is a method which can obtain a window material with a desired light control function using each member mentioned above.
Examples of the manufacturing method include a method in which the daylighting member, the adhesive layer, and the window material are arranged in this order and then thermocompression bonded.

2. Second Embodiment Next, a second embodiment of the window material with a light control function of the present invention will be described.
The window material with a light control function of this aspect is the above-described window material with a light control function, and includes a pair of window materials and a daylighting member disposed via an adhesive layer between the pair of window materials. I have it.

  As such a window material with a light control function of this aspect, it can be as shown in FIG.

The window material with a light control function of this aspect has a window material, a daylighting member, and an adhesive layer.
Hereafter, each structure of the window material with a light control function of this aspect is demonstrated in detail.
The daylighting member used in this embodiment can be the same as that described in the above section “A. Daylighting member” except that the adhesive layer is not usually included. To do.

(1) Window material The window material in this aspect is not particularly limited as long as it is generally used. For example, the window material is the same as the contents described in the above section (1) First embodiment. It can be.
In this aspect, the pair of glass plates facing each other may be the same material or thickness, or may be different.

(2) Adhesive layer In this aspect, a daylighting member is arrange | positioned through an adhesive layer between a pair of said window material.

Such an adhesive layer is not particularly limited as long as it can stably adhere the daylighting member and the window material.
Specifically, what is used as an adhesive agent for a general daylighting member can be used as the adhesive layer. Examples of the adhesive include thermoplastic resins such as ethylene-vinyl acetate copolymer resin (EVA) and polyvinyl butyral resin (PVB), and thermosetting resins obtained by adding a cross-linking material thereto. And PVB are preferably used.
The adhesive layer can be used by laminating one or more of the adhesives. Specifically, when two types of the above-mentioned adhesives are stacked and used, the layer structure of the window material with a light control function of this aspect is, for example, window material / second adhesive layer (EVA) / first It can be set as the structure of an adhesive layer (PVB) / lighting member / first adhesive layer (PVB) / second adhesive layer (EVA) / window material.
Moreover, the said contact bonding layer can contain a ultraviolet absorber, a light stabilizer, etc. as needed.
In addition, about the said ultraviolet absorber and light stabilizer, and those content, it is the same as that of the content as described in the item of "(2) Adhesive layer" of "3. Other composition" of the above-mentioned "A. Daylighting member." can do.

The thickness of the adhesive layer is preferably in the range of 100 μm to 2000 μm, for example, and more preferably in the range of 300 μm to 1600 μm. If the thickness of the adhesive layer is less than the above range, it may become a core when foreign matter or the like is mixed, and bubbles may be generated. If the thickness of the adhesive layer exceeds the above range, the window material with light control function as a whole This is because there is a risk of causing problems such as an increase in thickness and weight and insufficient strength.
The thickness of the adhesive layer is not the total thickness of the adhesive layers formed on both surfaces of the daylighting member, but the thickness of only the adhesive layer formed on one surface of the daylighting member. It is.

The adhesive layer preferably has a predetermined light transmittance.
Specifically, the visible light transmittance of the adhesive layer preferably has a predetermined light transmittance. Specifically, the visible light transmittance of the adhesive layer is preferably 70% or more, more preferably 80% or more, and particularly preferably 85% or more. When the adhesive layer has the above-described light transmittance, when the window material with a light control function of this aspect is used for a window of a room, it is possible to suppress light incident from the outside from being absorbed by the adhesive layer. it can. Thereby, visibility can be improved and a lot of light can be taken into the room.
In addition, about visible light transmittance | permeability, since it can measure by the method similar to the visible light transmittance described in the term of the said "A. daylighting member", description here is abbreviate | omitted.

(3) Window material with light control function The window material with light control function of this aspect includes a window material, a daylighting member, and an adhesive layer, but may have other configurations as necessary. .

The window material with a light control function of this aspect preferably has a predetermined light transmittance.
About the total light transmittance of the said window material with a light control function, since it can be made to be the same as the content as described in the term of the said "(1) 1st embodiment", description here is abbreviate | omitted.

The manufacturing method of the window material with a light control function of this aspect will not be specifically limited if it is a method which can obtain the window material with a desired light control function using each member mentioned above, A common middle A method similar to that for a laminated glass having a film can be used.
Specifically, the above manufacturing method is such that a daylighting member obtained by a predetermined method is disposed between a pair of window materials via an adhesive layer, and then thermocompression bonded to obtain a window material with a light control function. Can be obtained.

C. Building Next, the building of the present invention will be described.
The building of the present invention is a building having a daylighting unit, and a window material with a light control function is installed in the daylighting unit, and the window material with a light control function is at least one of a daylighting member and the daylighting member. A window member disposed on the surface of the substrate, the daylighting member includes a base material, and a light control layer formed on one surface of the base material, and the light control layer includes: A resin light transmitting portion having a plurality of groove portions on one surface and a light control portion formed in the groove portion, wherein the resin light transmitting portion has a higher refractive index than the light control portion, and the resin The plastic deformation rate of the light-transmissive portion is in the range of 86% to 96%.

Such a building of the present invention will be described with reference to the drawings.
FIG. 7 is a schematic perspective view showing an example of a building according to the present invention.
As shown in FIG. 7, the building 30 of the present invention is a building 30 having a daylighting unit 31, and the daylighting unit 31 is provided with a window material 20 with a light control function, and the window material with a light control function. 20 has a daylighting member and a window member disposed on at least one surface of the daylighting member, and the daylighting member has a base material and light control formed on one surface of the base material. The light control layer has a resin light transmission portion having a plurality of grooves on one surface and a light control portion formed in the groove, and the resin light transmission portion The refractive index is higher than that of the light control unit, and the plastic deformation rate of the resin light transmission unit is in the range of 86% to 96%.

  According to the present invention, by using the window material with a light control function including the above-described daylighting member, the building can be excellent in daylighting performance and reliability.

The building of this invention has a lighting part and a window material with a light control function.
Hereinafter, each structure of the building of this invention is demonstrated in detail.

1. Window material with light control function The window material with light control function in the present invention has a daylighting member and a window material disposed on at least one surface of the daylighting member, and the daylighting member includes a base material, A light control layer formed on one surface of the substrate, and the light control layer is formed in a resin light transmitting portion having a plurality of groove portions on one surface and the groove portions. The resin light transmissive part has a refractive index higher than that of the light control part, and the plastic deformation rate of the resin light transmissive part is in the range of 86% to 96%.
Such a window material with a light control function has the same contents as those described in the above-mentioned section “B. Window material with a light control function”, and thus the description thereof is omitted here.

2. Daylighting part The daylighting part in the present invention is not particularly limited as long as it is generally used in buildings, and examples thereof include those provided on the outer wall of the building so as to communicate indoors and outdoors.
The number of the daylighting portions is appropriately set according to the size of the building.
Moreover, as the formation part of the said daylighting part, the scattered light of sunlight should just inject at least, the north side where direct sunlight does not enter other than the south side of the said building, the direction side where the adjacent building is near, etc. Can be included.

3. Building The building of this invention has the said lighting part and the said window material with a light control function installed in the said lighting part.
As said building, what has a lighting part is sufficient, and various buildings, such as an office building, can be mentioned.

D. The design method of the lighting member Next, the design method of the lighting member of this invention is demonstrated.
The design method of the lighting member of the present invention includes a base material and a light control layer formed on one surface of the base material, and the light control layer has a plurality of grooves on one surface. A resin light transmission part and a light control part formed in the groove part, wherein the resin light transmission part is a method for designing a daylighting member having a refractive index higher than that of the light control part. It has a material selection process which selects the constituent material of the said resin light transmission part so that the plastic deformation rate of a light transmission part may be in the range of 86%-96%.

According to the present invention, the material selecting step selects the constituent material of the resin light transmitting portion so that the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. Thus, even when a resin light transmission part is formed by transferring the concave / convex shape of the shaping original plate to a light transmission part forming composition containing a constituent material having a high refractive index, a large amount of the light transmission part forming composition is formed. The resin light transmitting portion can be stably taken out from the shaping original plate without adding a release agent.
Therefore, it is possible to easily design a daylighting member that is excellent in daylighting and can be stably manufactured.

The method for designing a daylighting member of the present invention includes a material selection step.
Hereinafter, each process of the design method of the lighting member of this invention is demonstrated in detail.

1. Material selection process The material selection process in this invention is a process of selecting the constituent material of the said resin light transmission part so that the plastic deformation rate of the said resin light transmission part may be in the range of 86%-96%. .

  In this step, as a method of selecting the constituent material of the resin light transmission part so that the plastic deformation rate of the resin light transmission part is in the range of 86% to 96%, the resin light transmission part Is not particularly limited as long as it can select a constituent material having a plastic deformation rate in the range of 86% to 96%, for example, the same as the content described in the section “A. Daylighting member” above. can do.

  The constituent material selected in this step is not particularly limited as long as the plastic deformation rate of the resin light transmitting portion can be in the range of 86% to 96%. The same as described in the section “Lighting member”.

2. Daylighting member design method The daylighting member design method of the present invention is not particularly limited as long as it includes the material selection step. For example, the light control unit material selection for selecting the constituent material of the light control unit It can have other processes, such as a process.

  The daylighting member designed by the daylighting member design method of the present invention is not particularly limited as long as the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. Since it can be made the same as the content as described in the section of “A. Daylighting member”, explanation here is omitted.

E. Next, the manufacturing method of the lighting member of this invention is demonstrated.
The manufacturing method of the lighting member of this invention has a base material and the light control layer formed on one surface of the said base material, The said light control layer has several groove part on one surface. A resin light transmissive portion and a light control portion formed in the groove portion, wherein the resin light transmissive portion is a method of manufacturing a daylighting member having a higher refractive index than the light control portion. The material selection step of selecting the constituent material of the resin light transmission portion so that the plastic deformation rate of the light transmission portion is in the range of 86% to 96%, and the constituent material selected by the material selection step And a light transmissive part forming step of forming the resin light transmissive part by using.

The manufacturing method of such a daylighting member of this invention is demonstrated with reference to figures. FIG. 8 is a process diagram showing an example of a method for producing a daylighting member of the present invention. As illustrated in FIG. 8, in the method for manufacturing a daylighting member of the present invention, the resin light transmitting portion is configured so that the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. A material is selected (not shown), the resin light transmission part is formed using the selected constituent material (FIGS. 8A to 8C), and then the groove part of the resin light transmission part The daylighting member 10 is obtained by forming the light control unit 13 in the frame 12 (FIG. 8D).
8A to 8C show the light transmission part forming step, and FIG. 8D shows the light control part forming step.
Further, in this example, the material selecting step selects a material containing a cured product of ionizing radiation curable resin as the constituent material (not shown), and the resinous light transmitting portion forming step includes the base material 1. The composition 2a for forming a light transmission part containing the ionizing radiation curable resin is applied on one surface of the resin (FIG. 8 (a)), and the shaping original plate M having a convex part is crosslinked and cured in a pressed state. (FIG. 8 (b)), the resin-made light transmission part 11 which has the several groove part 12 in one surface is formed by peeling the shaping | molding original plate M (FIG.8 (c)). Moreover, the said shaping | molding original plate has a some convex part on the surface, and the inversion shape of the said convex part, its dimension, etc. correspond to the shape, dimension, etc. of the said groove part.

According to the present invention, the material selecting step selects the constituent material of the resin light transmitting portion so that the plastic deformation rate of the resin light transmitting portion is in the range of 86% to 96%. Thus, in the light transmitting part forming step, even when the resin light transmitting part is formed by transferring the concavo-convex shape of the molding original plate to the light transmitting part forming composition containing the constituent material having a high refractive index, the light transmitting part is formed. Without adding a large amount of a release agent to the part-forming composition, the resin light-transmitting part can be stably taken out from the shaping original plate.
Therefore, the daylighting member excellent in daylighting can be manufactured stably.

The manufacturing method of the lighting member of this invention has the said material selection process and the said light transmissive part formation process.
Hereinafter, each process of the manufacturing method of the lighting member of this invention is demonstrated in detail.

1. Material selection process The material selection process in this invention is a process of selecting the constituent material of the said resin light transmission part so that the plastic deformation rate of the said resin light transmission part may be in the range of 86%-96%. .
As such a material selection process, in particular, as long as the constituent material of the resin light transmission part can be selected so that the plastic deformation rate of the resin light transmission part is within a range of 86% to 96%. The material selection process is not limited, and the same material selection process as described in the above section “D.

  The constituent material selected in this step is not particularly limited as long as the plastic deformation rate of the resin light transmitting portion can be in the range of 86% to 96%. .. “Lighting member” can be the same as the contents described in the section “(b) Constituent material of resin light transmitting portion”.

2. Light transmitting portion forming step The resinous light transmitting portion forming step in the present invention is a step of forming the resin light transmitting portion using the constituent material selected in the material selecting step.

As a method of forming the resin light transmitting portion in this step, any method may be used as long as it is a method of forming using the constituent material selected in the material selection step, and it differs depending on the type of the constituent material. There is a light transmitting part forming composition containing the above constituent materials, the light transmitting part forming composition is cured in a state where the forming original plate having a convex portion is pressed, and then the forming original plate is peeled off. The method of doing can be mentioned.
Moreover, when the hardened | cured material of the said ionizing radiation curable resin is included as the said constituent material, what contains the said ionizing radiation curable resin can be used as the said composition for light transmission part formation.

The shaping original plate has a plurality of convex portions on the surface, and the inversion shape of the convex portions and the dimensions thereof can correspond to the shape and dimensions of the groove portions.
The shaping master may be plate-shaped or roll-shaped.
As a constituent material of the shaping original plate, any material can be used as long as it can stably mold the groove with respect to the composition for forming a light transmission part, and a metal material or the like can be used.
The contact surface of the shaping original plate with the resin light transmitting portion may have a plating layer such as chrome plating.

  The method for applying the composition for forming a light transmission part is not particularly limited as long as it can be applied with a uniform film thickness. For example, spin coating, die coating, dip coating, A bar coating method, a gravure printing method, a screen printing method, or the like can be used.

  The curing method of the composition for forming a light transmission part is different depending on the type of the constituent material selected, but the constituent material contains a cured product of an ionizing radiation curable resin. Curing by irradiation with ionizing radiation is preferable, and ultraviolet rays and electron beams are preferably used because they are practical. About hardening conditions etc., it can set suitably according to the material of the said ionizing radiation curable resin.

3. Method for Producing Daylighting Member The method for producing a daylighting member of the present invention includes the material selecting step and the light transmitting portion forming step, but may include other steps as necessary.
As said other process, the light control part formation process which forms the said light control part, the adhesion layer formation process which forms the said adhesion layer, etc. can be mentioned.
The method for forming the light control unit in the light control unit forming step is not particularly limited. For example, a composition for forming a light control unit including a material for the light control unit is applied, and the resin light transmission unit is formed. A method of filling the groove portion and curing it can be used.
The method for forming the pressure-sensitive adhesive layer in the pressure-sensitive adhesive layer forming step is the same as that described in “(2) Pressure-sensitive adhesive layer” in “3. Other configuration” of “A. Daylighting member”. Can do.

  Since the daylighting member manufactured by the method for manufacturing the daylighting member of the present invention can be the same as the contents described in the above section “A. Daylighting member”, description thereof is omitted here.

  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 present invention will be described in more detail with reference to Examples and Comparative Examples.

[Example 1]
1. Preparation of mold roll Copper plating was formed on a cylindrical roll surface, and the plated portion was cut with a cutting tool to form a convex portion corresponding to the groove portion of the resinous light transmission portion. A diamond tool was used as the tool. The outer periphery of the copper plating layer of the die roll was cut at a predetermined pitch in the roll axis direction (roll width direction) to form convex portions formed at a predetermined pitch in the roll width direction. This cut roll is subjected to chrome plating, and has the vertical cross-sectional shape shown in FIG. 4 (d) as described above, in which a convex group in which a plurality is arranged in parallel with each other at a predetermined pitch in the width direction of the roll is formed. A mold roll was prepared.
About the design value of the size of the groove part of the resin-made light transmission part formed by shaping a convex group, it was set as the size shown below.
Here, θ1 to θ3 refer to angles formed by the first straight line, the second straight line, and the third straight line, respectively, with the surface of the resin light transmitting portion opposite to the base material. . The tip width refers to the width on the side far from the shaping original plate, and refers to the shortest width among the widths between the second straight line and the third straight line.

(Shape of convex group)
・ Θ1… 80 °
・ Θ2… 90 °
・ Θ3… 92 °
・ Width (W): 30μm
・ Height (T2): 200 μm
・ Pitch (P): 60μm
・ Tip width: 8μm

2. Formation of resin light transmission part A substrate (thickness 100 μm, PET film A4300 manufactured by Toyobo Co., Ltd.) was transported between a mold roll and a nip roll.
In accordance with the conveyance of the base material, the following composition A for forming a light transmission part is supplied onto the base material from the supply device, and the above light is interposed between the base material and the mold roll by the pressing force between the mold roll and the nip roll. The composition A for forming a transmission part was filled. At this time, the base thickness was adjusted by adjusting the pressing force. The base thickness decreases as the pressure increases, and the base thickness increases as the pressure decreases. Then, 1000 mJ / cm ^{2 of} ultraviolet rays are irradiated from the base material side with an ultraviolet irradiation device (light source D bulb manufactured by Nore Light Fusion Division, Heraeus Co., Ltd.), and the light transmitting part forming composition A is cured. A light transmission part was formed. Thereafter, the resin light transmission part formed on the substrate is released by releasing the resin light transmission part, which is a cured product of the light transmission part forming composition A, from the mold roll using a release roll. Obtained.
The following A-BPEF is 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene, and light acrylate POB-A is m-phenoxybenzyl acrylate.

(Light transmission part forming composition A)
・ A-BPEF (Bifunctional acrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) ・ ・ ・ 40 parts by mass ・ Light acrylate POB-A (Monofunctional acrylate manufactured by Kyoeisha Chemical Co., Ltd.) ・ ・ ・ 60 parts by mass ・ Irgacure 184 (Photopolymerization manufactured by BASF) Initiator) ... 3 parts by mass · Phosphoric ester of tetradecanol ethylene oxide 10 mol adduct (mold release agent) ... 0.03 parts by mass

3. Formation of Light Control Part A liquid light control part forming composition having the following composition is prepared, and the light control part forming composition is supplied onto the resin light transmission part released from the mold roll. Using a doctor blade installed substantially perpendicular to the advancing direction of the control unit, the groove formed in the resin light transmission unit was filled and the excess light control unit forming set was scraped off.
After that, UV light is irradiated at 1000 mJ / cm ² from the opposite side of the substrate with an ultraviolet irradiation device (light source D bulb manufactured by Heraeus Co., Ltd. Noble Light Fusion Division), and cured to form a light control unit. Thus, a daylighting member having a light control layer including a resin light transmission portion and a light control portion was obtained.

(Light control part forming composition)
· EBECRYL230 (Daicel Ornex Corp. urethane acrylate) · · · 40 parts · SR508 (Sartomer bifunctional acrylate) · · · 60 parts · Irgacure 184 (BASF photopolymerization initiator) · · 3 parts

[Example 2]
A daylighting member was obtained in the same manner as in Example 1 except that the light transmitting part forming composition B described below was used instead of the light transmitting part forming composition A.
Light acrylate PO-A is phenoxyethyl acrylate.

(Light transmission part forming composition B)
・ A-BPEF (bifunctional acrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) ... 40 parts by massLight acrylate POB-A (monofunctional acrylate manufactured by Kyoeisha Chemical Co., Ltd.) ... 40 parts by massLight acrylate PO-A (Kyoeisha Chemical Co., Ltd.) Monofunctional acrylate) ... 20 parts by mass · Irgacure 184 (photopolymerization initiator manufactured by BASF) · · 3 parts by mass · Phosphate ester of 10 mol of tetradecanol ethylene oxide adduct (mold release agent)・ 0.03 parts by mass

[Example 3]
A daylighting member was obtained in the same manner as in Example 1 except that the light transmitting part forming composition C described below was used instead of the light transmitting part forming composition A.

(Light transmission part forming composition C)
・ A-BPEF (Bifunctional acrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) 30 parts by weight Light acrylate POB-A (Monofunctional acrylate manufactured by Kyoeisha Chemical Co., Ltd.) 70 parts by weight Irgacure 184 (Photopolymerized by BASF) Initiator) ... 3 parts by mass · Phosphoric ester of tetradecanol ethylene oxide 10 mol adduct (mold release agent) ... 0.03 parts by mass

[Comparative Example 1]
A daylighting member was obtained in the same manner as in Example 1 except that the light transmitting part forming composition D described below was used instead of the light transmitting part forming composition A.

(Light transmission part forming composition D)
・ A-BPEF (bifunctional acrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) ... 25 parts by mass ・ Light acrylate POB-A (monofunctional acrylate manufactured by Kyoeisha Chemical Co., Ltd.) ... 75 parts by mass ・ Irgacure 184 (photopolymerization manufactured by BASF) Initiator) ... 3 parts by mass · Phosphoric ester of tetradecanol ethylene oxide 10 mol adduct (mold release agent) ... 0.03 parts by mass

[Comparative Example 2]
A daylighting member was obtained in the same manner as in Example 1 except that the following composition E for forming a light transmitting portion was used instead of the composition A for forming a light transmitting portion.

(Light transmission part forming composition E)
・ A-BPEF (Bifunctional acrylate manufactured by Shin-Nakamura Chemical Co., Ltd.) 55 mass parts ・ Light acrylate PO-A (Monofunctional acrylate manufactured by Kyoeisha Chemical Co., Ltd.) 45 mass parts ・ Irgacure 184 (Photopolymerization manufactured by BASF) Initiator) ... 3 parts by mass · Phosphoric ester of tetradecanol ethylene oxide 10 mol adduct (mold release agent) ... 0.03 parts by mass

[Evaluation]
1. Measurement of Plastic Deformation Rate The plastic deformation rate of the resin light transmission part produced in Examples 1 to 3 and Comparative Examples 1 to 2 was measured by forming a resin light transmission part for measurement.
The resin-made light transmission part for measurement is between the glass plate and the PET film as the substrate using the light transmission part forming compositions A to E used in Examples 1-3 and Comparative Examples 1-2. It was produced by irradiating 1000 mJ / cm ^{2 of} ultraviolet rays with a fusion D bulb from the PET surface.
Subsequently, it peeled off from the glass plate and obtained the smooth resin-made light transmission part for a measurement laminated | stacked on PET. The shape of the resin-made light transmitting portion for measurement was a square with a side of 1 cm. Moreover, the thickness of the resin-made light transmission part for measurement was about 60 μm. The glass resin plate was bonded via a double-sided tape, and the measurement resin light transmission portion was fixed so that the measurement resin light transmission portion became the outermost layer.
Subsequently, the plastic deformation rate of the measurement resin-made light transmitting portion was measured at 10 points by the above-described method using a Picodenter HM500 (manufactured by Fischer), and the average value was obtained. The results are shown in Table 1 below.
The maximum indentation depth was 5 μm or less.

2. Measurement of Refractive Index The refractive indexes of the resin light transmission part and the light control part were measured by forming the measurement resin light transmission part and the measurement light control part, respectively.
Here, the resin-made light transmission part for measurement and the light control part for measurement were formed by the method described in the above section “1. Measurement of plastic deformation rate”.
Moreover, the refractive index measured the refractive index in 589 nm and 20 degreeC with the Abbe refractometer about the obtained resin-made light transmission part for a measurement, and the light control part for a measurement.
Table 1 below shows the refractive index measurement results of the resin-made light transmission parts for measurement of Examples 1 to 3 and Comparative Examples 1 to 2 (Compositions A to E for forming a light transmission part). Moreover, the refractive index measurement result of the measurement light control unit was 1.475.

3. Peelability evaluation The peelability of the daylighting member was evaluated by visually confirming the peeled state of the resin light transmitting portion from the mold roll. The evaluation criteria were as follows. The results are shown in Table 1 below.
○: When the resin light transmission part was peeled off from the mold roll, it was peeled cleanly.
X: When the resin light transmission part was peeled from the mold roll, the resin remained on the mold roll side or the substrate was torn.

4). Formability evaluation The formability of the daylighting member was evaluated by evaluating the daylighting performance using the obtained daylighting member.
First, on one surface of a window member arranged so as to be perpendicular to the ground, the daylighting members obtained in Examples 1 to 3 and Comparative Examples 1 and 2 are on the side opposite to the base material of the light control layer. A window material with a light control function for evaluation was produced by bonding the surface as a bonding surface with a window material via an adhesive layer (LUCIACS (registered trademark) CS9621T manufactured by Nitto Denko Corporation).
Next, the illuminance on the desk 3 m away from the window material with a light control function was measured using an illuminometer (T-10MA manufactured by Konica Minolta Co., Ltd.), and the lighting performance was evaluated from the illuminance ratio depending on the presence or absence of the lighting tools. . The evaluation criteria were as follows. The results are shown in Table 1 below.
○: Illuminance ratio is 0.9 or more ×: Illuminance ratio is less than 0.9

From Table 1, the daylighting members of Examples 1 to 3 have a resin light transmission portion with a plastic deformation rate in the range of 86% to 96%, and can be peeled from the mold roll without causing cohesion failure, Furthermore, it was confirmed that a resin-shaped light transmitting portion having a desired shape can be obtained and can be stably manufactured.
In addition, the daylighting members of Examples 1 to 3 are excellent in daylighting because the moldability evaluation is all “good”, and the peelability evaluation is all “good”, and the resin light transmitting part is peeled off from the mold roll. Therefore, it was confirmed that the adhesion between the base material and the resin light transmission part was good.

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Light control layer 3 ... Adhesive layer 10 ... Daylighting member 11 ... Resinous light transmission part 12 ... Groove part 13 ... Light control part 20 ... Window material with light control function 21 ... Window material 30 ... Building 31 ... Daylighting Part

Claims (5)

A substrate;
A light control layer formed on one surface of the substrate;
Have
The light control layer has a resin light transmission portion having a plurality of grooves on one surface and a light control portion formed in the grooves,
The resin light transmission part has a higher refractive index than the light control part,
The daylighting member, wherein the plastic light transmission portion has a plastic deformation rate in a range of 86% to 96%.   The daylighting member according to claim 1, wherein a refractive index of the resin light transmitting portion is 1.58 or more. A window material with a light control function, comprising: a pair of window materials; and a daylighting member disposed via an adhesive layer between the pair of window materials,
The daylighting member is
A substrate;
A light control layer formed on one surface of the substrate;
Have
The light control layer has a resin light transmission portion having a plurality of grooves on one surface and a light control portion formed in the grooves,
The resin light transmission part has a higher refractive index than the light control part,
A window material with a light control function, wherein a plastic deformation rate of the resin light transmitting portion is in a range of 86% to 96%. A substrate;
A light control layer formed on one surface of the substrate;
Have
The light control layer has a resin light transmission portion having a plurality of grooves on one surface and a light control portion formed in the grooves,
The resin light transmission part is a method of designing a daylighting member having a higher refractive index than the light control part,
A lighting member design comprising a material selection step of selecting a constituent material of the resin light transmission portion so that a plastic deformation rate of the resin light transmission portion is in a range of 86% to 96%. Method. A substrate;
A light control layer formed on one surface of the substrate;
Have
The light control layer has a resin light transmission portion having a plurality of grooves on one surface and a light control portion formed in the grooves,
The resin light transmission part is a manufacturing method of a daylighting member having a higher refractive index than the light control part,
A material selection step of selecting a constituent material of the resin light transmission part such that the plastic deformation rate of the resin light transmission part is in a range of 86% to 96%;
A light transmitting portion forming step of forming the resin light transmitting portion using the constituent material selected in the material selecting step;
The manufacturing method of the lighting member characterized by having.

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