Transparent laminating film for partitions and partitions

Abstract

To provide a partition and a transparent laminate film for a partition that are able to effectively inhibit reflection of light and facilitate catching words spoken by a conversation partner.SOLUTION: A partition 10 comprises: a transparent laminated film 30 having a first surface 301 and a second surface 302 located opposite the first surface 301; and a film support 70 that supports the transparent laminated film 30. The transparent laminated film 30 includes: a first surface antireflection layer 40 forming the first side 301; and a second surface antireflection layer 50 forming the second side 302.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present disclosure relates to partitions and transparent laminate films for partitions. [Background technology]

[0002] Partitions for preventing the transfer of droplets such as saliva caused by sneezing or coughing between people facing each other have been known (see, for example, Patent Document 1). Patent Document 1 discloses a partition that includes a partition panel made of a transparent acrylic plate and a stand that supports the partition panel in an upright position. Such a partition is placed between people facing each other to prevent the transfer of droplets such as saliva between the people facing each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3232184 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with such partitions, there is a risk that users or other individuals may be reflected in the partition due to the reflection of light from indoor lighting or sunlight entering from outdoors. If users or other individuals are reflected in the partition, it may be difficult for people sitting across the partition to see each other. If it becomes difficult for people sitting across the partition to see each other, for example, when communicating face-to-face, such as at a hotel front desk or at a financial institution's consultation desk, where people need to see each other's facial expressions and mouth movements, the quality of communication may be reduced. For this reason, there is a need for partitions that can reduce the visibility caused by light reflection.

[0005] Furthermore, when communicating through a partition, it may be difficult for the user to hear the voice of the other person. In this way, even if the user has difficulty hearing the voice of the other person, the quality of communication may deteriorate.

[0006] The present disclosure has been made in consideration of these points, and aims to provide a partition and a transparent laminate film for a partition that can effectively suppress light reflection and make it easier to hear what the other person is saying during a conversation. [Means for solving the problem]

[0007] A partition according to one embodiment comprises a transparent laminate film having a first surface and a second surface located opposite the first surface, and a film support portion that supports the transparent laminate film, wherein the transparent laminate film includes a first-surface anti-reflection layer that constitutes the first surface and a second-surface anti-reflection layer that constitutes the second surface.

[0008] In one embodiment of the partition, the transparent laminate film may further include a core layer located between the first-side anti-reflection layer and the second-side anti-reflection layer.

[0009] In one embodiment of the partition, the transparent laminate film may further include a first transparent adhesive layer that adheres the first-side anti-reflection layer and the core layer to each other, and a second transparent adhesive layer that adheres the core layer and the second-side anti-reflection layer to each other.

[0010] In one embodiment of the partition, the transparent laminate film may further include a transparent adhesive layer that bonds the first-side anti-reflection layer and the second-side anti-reflection layer to each other.

[0011] In the partition according to one embodiment, the transparent laminate film may have a thickness of 300 μm or less.

[0012] In the partition according to one embodiment, the transparent laminate film may have a light reflectance of 3.0% or less.

[0013] In the partition according to one embodiment, the transparent laminate film may have a total light transmittance of 90% or more.

[0014] In the partition according to one embodiment, the film support portion may support the transparent lamination film in a flattened state.

[0015] The partition according to one embodiment may further include a stand portion that supports the film support portion so that the first surface of the transparent laminate film is perpendicular to a horizontal plane.

[0016] In one embodiment of a partition, the transparent laminate film may have an upper edge, a lower edge, and side edges extending between the upper edge and the lower edge, the film support portion may have a first groove portion formed therein into which the side edges of the transparent laminate film are inserted, a gap may be formed between the transparent laminate film and the first groove portion, and the transparent laminate film may be supported on the film support portion in a state in which it is movable relative to the film support portion.

[0017] In the partition according to one embodiment, the width of the first groove portion along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

[0018] In one embodiment of a partition, the film support portion may have a second groove portion formed therein into which the lower edge of the transparent laminate film is inserted, and a gap may be formed between the transparent laminate film and the second groove portion.

[0019] In the partition according to one embodiment, the width of the second groove portion along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

[0020] In one embodiment of a partition, the second groove portion may include a first side surface facing the first surface and a second side surface facing the second surface, and the height of the first side surface may be different from the height of the second side surface.

[0021] In one embodiment of a partition, the transparent laminate film may have an upper edge, a lower edge, and side edges extending between the upper edge and the lower edge, and the film support portion may have a groove portion formed therein into which the lower edge of the transparent laminate film is inserted, and the groove portion may be curved in a planar view, and a gap may be formed between the transparent laminate film and the groove portion, and the transparent laminate film may be supported on the film support portion in a state in which it is movable relative to the film support portion.

[0022] In one embodiment of the partition, the width of the groove along the thickness direction of the transparent laminate film may be 0.5 mm or more and 3 mm or less.

[0023] In one embodiment of the partition, the corners between the top edge and the side edges may be rounded.

[0024] A transparent laminate film for a partition according to one embodiment is a transparent laminate film for use in the partition described above, having a first surface and a second surface located opposite the first surface, and comprising a first-surface anti-reflection layer constituting the first surface and a second-surface anti-reflection layer constituting the second surface.

[0025] A building according to one embodiment is a building that includes the partition described above. [Effects of the Invention]

[0026] According to the present disclosure, it is possible to provide a partition and a transparent laminate film for a partition that can effectively suppress light reflection and make it easier to hear what the other person is saying during a conversation. [Brief explanation of the drawings]

[0027] [Figure 1A] FIG. 1A is a perspective view of a partition according to one embodiment. [Figure 1B] FIG. 1B is a perspective view of a partition according to one embodiment. [Figure 1C] FIG. 1C is a vertical cross-sectional view of the partition shown in FIG. 1A (cross-sectional view taken along line IC-IC in FIG. 1A). [Figure 2A] FIG. 2A is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. [Figure 2B] FIG. 2B is a cross-sectional view showing an example of a layer structure of the protective film-attached transparent laminate film according to one embodiment. [Figure 2C] FIG. 2C is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. [Figure 2D] FIG. 2D is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. [Figure 2E] FIG. 2E is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. [Figure 2F] FIG. 2F is a cross-sectional view showing an example of a layer structure of a transparent laminate film with a protective film according to one embodiment. [Figure 3] FIG. 3 is a perspective view showing a first modified example of the film supporting portion of the partition according to the embodiment. [Figure 4] FIG. 4 is a front view showing a first modified example of the film supporting portion of the partition according to the embodiment. [Figure 5] FIG. 5 is a rear view showing a first member of a film support portion of a partition according to one embodiment. [Figure 6] FIG. 6 is a front view showing a second member of a film support portion of a partition according to one embodiment. [Figure 7]FIG. 7 is a cross-sectional view (cross-sectional view taken along line VII-VII in FIG. 4) showing a first modified example of the film supporting portion of the partition according to the embodiment. [Figure 8] FIG. 8 is a cross-sectional view (cross-sectional view taken along line VIII-VIII in FIG. 4) showing a first modified example of the film support portion of the partition according to the embodiment. [Figure 9] FIG. 9 is a cross-sectional view (cross-sectional view taken along line IX-IX in FIG. 4) showing a first modified example of the film supporting portion of the partition according to the embodiment. [Figure 10] FIG. 10 is a cross-sectional view (cross-sectional view taken along line XX in FIG. 4) showing a first modified example of the film supporting portion of the partition according to the embodiment. [Figure 11] FIG. 11 is a perspective view showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 12] FIG. 12 is a front view showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 13] FIG. 13 is a perspective view showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 14] FIG. 14 is a perspective view showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 15] FIG. 15 is a cross-sectional view (cross-sectional view taken along line XV-XV in FIG. 12) showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 16] FIG. 16 is a cross-sectional view (cross-sectional view taken along line XVI-XVI in FIG. 12) showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 17] FIG. 17 is a cross-sectional view (cross-sectional view taken along line XVII-XVII in FIG. 12) showing a second modified example of the film supporting portion of the partition according to the embodiment. [Figure 18] FIG. 18 is a diagram illustrating the puncture resistance test according to the example and the comparative example. [Figure 19] FIG. 19 is a diagram illustrating an acoustic characteristic evaluation test according to the example and the comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present embodiment will be described below with reference to the drawings. FIGS. 1A to 2F are diagrams illustrating the present embodiment. The following figures are schematic diagrams. Therefore, the size and shape of each part are appropriately exaggerated for ease of understanding. Furthermore, appropriate modifications can be made within the scope of the technical concept. In the following figures, identical parts are denoted by the same reference numerals, and some detailed descriptions may be omitted. Furthermore, the numerical values, such as dimensions, and material names of each component described in this specification are examples of embodiments, and are not limited to these and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are interpreted not only strictly but also to include substantially the same state.

[0029] partition First, the partition 10 will be described. Figures 1A and 1B show an example of the partition 10 according to the present embodiment. Figure 1C is a vertical cross-sectional view of the partition 10 shown in Figure 1A, taken along a plane perpendicular to a first surface 301 of a transparent laminate film 30 (described later) and a horizontal plane G (described later). In this specification, "top" and "bottom" refer to the upper and lower sides, respectively, of the partition 10 in an upright position (Figures 1A to 1C).

[0030] The partition 10 is placed in a room R, such as a conference room or meeting space. The partition 10 can be used to divide the space in the room R. The partition 10 can be placed on a desk T placed in the room R. In this case, the top surface of the desk T can be parallel to a horizontal plane G. The partition 10 can also be placed on the desk T, for example, between a user H1 and a user H2 facing the user H1. The partition 10 serves to prevent droplets of saliva and the like from transferring between the users H1 and H2. In FIGS. 1A and 1B, the users H1 and H2 on the partition 10 can correspond to speakers who speak in the room R. In the example shown in FIGS. 1A and 1B, the partition 10 is placed on the desk T placed inside the room R so as to block the front of the users H1 and H2 facing each other.

[0031] 1A to 1C, the partition 10 includes a transparent laminate film 30 and a film support portion 70 that supports the transparent laminate film 30. The partition 10 may further include a stand portion 90.

[0032] The shape of the transparent laminate film 30 is not particularly limited and may be determined appropriately depending on the shape of the space partitioned by the partition 10. In the example shown in FIGS. 1A and 1B, the transparent laminate film 30 has a rectangular shape. The transparent laminate film 30 has a first surface 301 and a second surface 302 located on the opposite side of the first surface 301. The first surface 301 and the second surface 302 are parallel to each other. The transparent laminate film 30 also has a pair of first sides (side edges) 30a and a pair of second sides (upper and lower edges) 30b that are perpendicular to the first sides 30a. The first sides 30a are perpendicular to a horizontal plane G (see FIG. 1C). The second sides 30b are parallel to the horizontal plane G. The pair of first sides (side edges) 30a extend between the pair of second sides (upper and lower edges) 30b. Other configurations of the transparent laminate film 30 will be described later.

[0033] Next, the film support section 70 will be described.

[0034] (film support part) As described above, the film support section 70 supports the transparent laminate film 30. It is preferable that the film support section 70 supports the transparent laminate film 30 in a flattened state. This makes it possible to effectively suppress light reflection on the transparent laminate film 30.

[0035] 1A and 1B, the film support section 70 has an overall rectangular frame shape. The film support section 70 has a pair of first portions 71 and a pair of second portions 72 extending between the pair of first portions 71. The pair of first portions 71 extend linearly and perpendicular to the horizontal plane G. The pair of second portions 72 extend linearly and parallel to the horizontal plane G. The pair of first portions 71 and the pair of second portions 72 are connected to each other. Note that the manner in which the first portions 71 and the second portions 72 are connected to each other is not particularly limited. For example, the first portions 71 and the second portions 72 may be connected to each other by screwing. Alternatively, the first portions 71 and the second portions 72 may be connected to each other by welding or the like.

[0036] The first portion 71 and the second portion 72 each sandwich the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. Specifically, the pair of first portions 71 sandwich the peripheries of the pair of first sides 30a of the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. The pair of second portions 72 sandwich the peripheries of the pair of second sides 30b of the transparent laminate film 30 in the thickness direction of the transparent laminate film 30. As a result, the first portion 71 of the film support portion 70 suppresses bending of the first sides 30a of the transparent laminate film 30, and the second portion 72 of the film support portion 70 suppresses bending of the second sides 30b of the transparent laminate film 30. As a result, the transparent laminate film 30 is supported in a flattened state.

[0037] In the example shown in FIG. 1B , the film support section 70 has first portions 71 that sandwich the periphery of the pair of first sides 30 a of the transparent laminate film 30, but does not have second portions 72 that sandwich the periphery of the pair of second sides 30 b of the transparent laminate film 30. Even in the example shown in FIG. 1B , the first portions 71 of the film support section 70 can suppress bending of the first side 30 a of the transparent laminate film 30. Furthermore, in the film support section 70 shown in FIG. 1B , bending of the second side 30 b can be suppressed by adjusting the spacing between the pair of first portions 71. That is, by adjusting the spacing between the pair of first portions 71, tension can be applied to the transparent laminate film 30, thereby suppressing bending of the second side 30 b. This allows the transparent laminate film 30 to be supported in a flattened state.

[0038] Although not shown, the film support member 70 may be a member that suspends the transparent laminate film 30. For example, the film support member 70 may support the vicinity of the upper second edge 30b of the pair of second edges 30b of the transparent laminate film 30, or may be fixed to the ceiling, wall, or beam of the room R. When the film support member 70 supports the transparent laminate film 30 by suspending it, the film support member 70 may have a weight attached near the lower second edge 30b of the pair of second edges 30b. The weight can suppress deformation of the second edge 30b of the transparent laminate film 30, thereby more stably supporting the transparent laminate film 30. The shape and material of the weight are not particularly limited as long as it has a weight that is sufficient to suppress deformation of the second edge 30b of the transparent laminate film 30.

[0039] From the viewpoint of more stably supporting the transparent laminate film 30 in a flattened state, it is preferable that the film support portion 70 has a pair of first portions 71, and it is even more preferable that it has a pair of first portions 71 and a pair of second portions 72.

[0040] The material of the film support portion 70 is not particularly limited as long as the transparent laminate film 30 is supported in a flattened state by the film support portion 70. The material of the film support portion 70 may be, for example, a metal such as aluminum, iron, or titanium, or an alloy such as stainless steel, or may be an acrylic resin, a PET (polyethylene terephthalate) resin, vinyl chloride, or a polyolefin resin such as polyethylene polypropylene.

[0041] The configuration of the film support portion 70 is not particularly limited as long as the film support portion 70 can support the transparent laminate film 30. The configuration of the film support portion 70 may be selected depending on the bending stress of the transparent laminate film 30, etc.

[0042] Although the example in which the film support portion 70 supports the transparent laminate film 30 has been described in which the transparent laminate film 30 is sandwiched between the first portion 71 and the second portion 72 in the thickness direction of the transparent laminate film 30, the present invention is not limited to this. For example, the transparent laminate film 30 may be fixed to a rod-shaped structure using an adhesive film. Alternatively, the transparent laminate film 30 may be attached to a metal rod-shaped structure using a magnet.

[0043] The effect of the partition 10 having the film support portion 70 will be described. As will be described later, by using the transparent laminate film 30 in the partition 10, light reflection in the partition is suppressed compared to a partition panel made of a general acrylic plate. Furthermore, by using the transparent laminate film 30 in the partition 10, the transparency of the partition is improved compared to a partition panel made of a general acrylic plate. On the other hand, the transparent laminate film 30 as described above is more easily bent than the acrylic plates used in general partitions. When the transparent laminate film 30 bends, wrinkles (wavy shapes) may occur on the surface of the transparent laminate film 30, as will be described later, which may make it difficult for users H1 and H2 to see each other.

[0044] In contrast, by supporting the transparent laminate film 30 with the film support portion 70, it is possible to suppress the bending of the transparent laminate film 30 while suppressing light reflection and improving transparency.

[0045] (Stand) Next, the stand unit 90 will be described. The stand unit 90 supports the film support unit 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G. The term "perpendicular" to the horizontal plane G of the first surface 301 of the transparent laminate film 30 is to be interpreted as including the case where the first surface 301 is substantially perpendicular to the horizontal plane G, in addition to the case where the first surface 301 is perpendicular to the horizontal plane G in the strict sense. "Substantially perpendicular" means, for example, that the angle between the first surface 301 and the horizontal plane G is 5° or less, or 3° or less.

[0046] 1A and 1B, the stand unit 90 has a first stand unit 91 and a second stand unit 92. The first stand unit 91 is connected to one of the first portions 71 of the film support unit 70 (the first portion 71 on the left in FIGS. 1A and 1B). The second stand unit 92 is connected to the other of the first portions 71 of the film support unit 70 (the first portion 71 on the right in FIGS. 1A and 1B).

[0047] 1A and 1B, the first stand portion 91 and the second stand portion 92 have a plate-shaped vertical portion 93 extending in the up-down direction when viewed from the thickness direction of the transparent laminate film 30, and a plate-shaped horizontal portion 94 extending in the horizontal direction when viewed from the thickness direction. The vertical portion 93 is connected to the horizontal portion 94 at its lower end. The vertical portion 93 and the horizontal portion 94 of the first stand portion 91 and the second stand portion 92 are each connected to the first portion 71 of the film support portion 70.

[0048] 1A to 1C, the stand unit 90 is placed on the desk T so that the horizontal portions 94 of the first stand unit 91 and the second stand unit 92 are in surface contact with the upper surface of the desk T. This allows the stand unit 90 to support the film support unit 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G.

[0049] The configuration of the stand unit 90 is not particularly limited as long as it can support the film support unit 70. For example, the material of the stand unit 90 is not particularly limited as long as it can support the film support unit 70. The material of the film support unit 70 may be, for example, a metal such as aluminum, iron, or titanium, or an alloy such as stainless steel, or may be an acrylic resin, a PET (polyethylene terephthalate) resin, or a polyolefin resin such as vinyl chloride or polyethylene polypropylene. The method of connecting the stand unit 90 to the film support unit 70 is not particularly limited as long as it can support the film support unit 70. For example, the stand unit 90 may be connected to the film support unit 70 by screws. Furthermore, the stand unit 90 may be integrated with the film support unit 70 by welding or the like.

[0050] (Transparent laminated film) Next, the transparent laminate film 30 will be described in detail. As described above, the transparent laminate film 30 is used in the partition 10. A protective film that protects the first surface 301 or the second surface 302 may be attached to the transparent laminate film 30. Here, first, a protective film-attached transparent laminate film 60 in which a protective film is attached to the transparent laminate film 30 will be described. FIGS. 2A to 2F show an example of the layer structure of the protective film-attached transparent laminate film 60. As shown in FIGS. 2A to 2F, the protective film-attached transparent laminate film 60 includes the transparent laminate film 30 according to the present embodiment, a first-surface protective film 61 that protects the first surface 301 of the transparent laminate film 30, and a second-surface protective film 62 that protects the second surface 302 of the transparent laminate film 30.

[0051] The first-side protective film 61 and the second-side protective film 62 serve to prevent scratches on the first side 301 and the second side 302 of the transparent laminate film 30, respectively, and to prevent contamination of the first side 301 and the second side 302 by foreign matter, etc. The first-side protective film 61 and the second-side protective film 62 are each detachably attached to the transparent laminate film 30. The first-side protective film 61 and the second-side protective film 62 may each include an adhesive layer (not shown) and be attached to the transparent laminate film 30 via this adhesive layer. The adhesive strength of the adhesive layer may be, for example, approximately 0.05 N / 25 mm or more and 5 N / 25 mm or less. When using the partition 10, the first-side protective film 61 and the second-side protective film 62 are each peeled off from the transparent laminate film 30. The first-side protective film 61 and the second-side protective film 62 may be made of, for example, a polyester resin or a polyolefin such as polyethylene or polypropylene.

[0052] Next, the layer structure of the transparent laminate film 30 according to this embodiment will be described. As shown in Figures 2A to 2F, the transparent laminate film 30 includes a first-side antireflection layer 40 that forms the first surface 301, and a second-side antireflection layer 50 that forms the second surface 302. As shown in Figures 2A and 2B, the transparent laminate film 30 may further include a transparent adhesive layer 31 that bonds the first-side antireflection layer 40 and the second-side antireflection layer 50 together.

[0053] 2A and 2B, the transparent laminate film 30 includes, in this order from the first surface 301 to the second surface 302, a first-surface antireflection layer 40, a transparent adhesive layer 31, and a second-surface antireflection layer 50. In this case, in the transparent laminate film 30, the first-surface antireflection layer 40 is exposed outward from the first surface 301 side. In addition, in the transparent laminate film 30, the second-surface antireflection layer 50 is exposed outward from the second surface 302 side.

[0054] 2A and 2B, the first-side antireflection layer 40 includes a first-side antireflection functional layer 41 and a first-side transparent substrate layer 42, which are arranged in this order from the first surface 301 to the second surface 302. The first-side antireflection functional layer 41 also includes a first-side refractive layer 43 and a first-side hard coat layer 44, which are arranged in this order from the first surface 301 to the second surface 302. The first-side refractive layer 43 further includes a first-side low-refractive index layer 45 and a first-side high-refractive index layer 46, which are arranged in this order from the first surface 301 to the second surface 302. Here, the first-side high-refractive index layer 46 may include a first first-side high-refractive index layer 47 and a second first-side high-refractive index layer 48, which are arranged in this order from the first surface 301 to the second surface 302, as shown in FIG. 2B.

[0055] 2A and 2B, the second-side antireflection layer 50 includes a second-side antireflection functional layer 51 and a second-side transparent substrate layer 52, which are arranged in this order from the second surface 302 to the first surface 301. The second-side antireflection functional layer 51 also includes a second-side refractive layer 53 and a second-side hard coat layer 54, which are arranged in this order from the second surface 302 to the first surface 301. The second-side refractive layer 53 further includes a second-side low-refractive index layer 55 and a second-side high-refractive index layer 56, which are arranged in this order from the second surface 302 to the first surface 301. Here, as shown in FIG. 2B, the second-side high-refractive index layer 56 may include a first second-side high-refractive index layer 57 and a second second-side high-refractive index layer 58, which are arranged in this order from the second surface 302 to the first surface 301.

[0056] 2C and 2D, the transparent laminate film 30 may further include a core layer 32 located between the first-side antireflection layer 40 and the second-side antireflection layer 50. In this case, the transparent laminate film 30 may further include a first transparent adhesive layer 31a that bonds the first-side antireflection layer 40 and the core layer 32 to each other, and a second transparent adhesive layer 31b that bonds the core layer 32 and the second-side antireflection layer 50 to each other.

[0057] 2C and 2D, the transparent laminate film 30 includes, in this order from the first surface 301 to the second surface 302, a first-surface antireflection layer 40, a first transparent adhesive layer 31a, a core layer 32, a second transparent adhesive layer 31b, and a second-surface antireflection layer 50. In this case, too, the first-surface antireflection layer 40 is exposed outward from the first surface 301 side of the transparent laminate film 30. Furthermore, the second-surface antireflection layer 50 is exposed outward from the second surface 302 side of the transparent laminate film 30.

[0058] 2C and 2D, the first-side antireflection layer 40 includes a first-side antireflection functional layer 41 and a first-side transparent substrate layer 42, which are arranged in this order from the first surface 301 to the second surface 302. The first-side antireflection functional layer 41 also includes a first-side refractive layer 43 and a first-side hard coat layer 44, which are arranged in this order from the first surface 301 to the second surface 302. The first-side refractive layer 43 also includes a first-side low-refractive index layer 45 and a first-side high-refractive index layer 46, which are arranged in this order from the first surface 301 to the second surface 302. Here, the first-side high-refractive index layer 46 may include a first first-side high-refractive index layer 47 and a second first-side high-refractive index layer 48, which are arranged in this order from the first surface 301 to the second surface 302, as shown in FIG. 2D.

[0059] 2C and 2D, the second-side antireflection layer 50 includes a second-side antireflection functional layer 51 and a second-side transparent substrate layer 52, which are arranged in this order from the second surface 302 to the first surface 301. The second-side antireflection functional layer 51 also includes a second-side refractive layer 53 and a second-side hard coat layer 54, which are arranged in this order from the second surface 302 to the first surface 301. The second-side refractive layer 53 further includes a second-side low-refractive index layer 55 and a second-side high-refractive index layer 56, which are arranged in this order from the second surface 302 to the first surface 301. Here, as shown in FIG. 2D, the second-side high-refractive index layer 56 may include a first second-side high-refractive index layer 57 and a second second-side high-refractive index layer 58, which are arranged in this order from the second surface 302 to the first surface 301.

[0060] 2A to 2D, the first-side anti-reflection layer 40 has a basic configuration including a first-side high-refractive index layer 46 and a first-side low-refractive index layer 45 on a first-side transparent substrate layer 42. Also, as described above, the second-side anti-reflection layer 50 has a basic configuration including a second-side high-refractive index layer 56 and a second-side low-refractive index layer 55 on a second-side transparent substrate layer 52. The first-side high-refractive index layer 46 (second-side high-refractive index layer 56) and the first-side low-refractive index layer 45 (second-side low-refractive index layer 55) serve to provide an anti-reflection function through optical interference.

[0061] The first-side antireflection layer 40 (second-side antireflection layer 50) may be provided with an optical interference function of three or more layers by further providing a medium-refractive index layer, but an excessively multi-layer structure is undesirable from a cost-effectiveness perspective. Therefore, the first-side antireflection layer 40 (second-side antireflection layer 50) according to this embodiment is preferably configured to provide antireflection function through optical interference with two layers: a first-side high-refractive index layer 46 (second-side high-refractive index layer 56) and a first-side low-refractive index layer 45 (second-side low-refractive index layer 55). The first-side antireflection layer 40 (second-side antireflection layer 50) may be configured with a first-side hard coat layer 44 (second-side hard coat layer 54) having a medium refractive index, and provide antireflection function through optical interference with three layers: a medium-refractive index layer, a high-refractive index layer, and a low-refractive index layer.

[0062] 2E and 2F, the first-surface refractive layer 43 may not include the first-surface high-refractive-index layer 46. Also, as shown in Figures 2E and 2F, the second-surface refractive layer 53 may not include the second-surface high-refractive-index layer 56.

[0063] Each layer of the transparent laminate film 30 will be described below.

[0064] <First-Side Antireflection Layer and Second-Side Antireflection Layer> The first-side anti-reflection layer 40 is a layer for suppressing reflection of light incident from the first surface 301 of the transparent laminate film 30. By providing the first-side anti-reflection layer 40 to the transparent laminate film 30, light reflection on the first surface 301 of the transparent laminate film 30 can be suppressed. This improves the visibility of user H2's figure, for example, when user H1, who is on the first surface 301 side of the transparent laminate film 30, visually recognizes user H2, who is on the second surface 302 side of the transparent laminate film 30. More specifically, when user H1 visually recognizes user H2, it is possible to prevent user H1's own face, etc., from being reflected on the first surface 301 of the transparent laminate film 30. This prevents user H1 from having difficulty visually recognizing user H2's figure. This improves the visibility of user H2's facial expressions and lip movements, for example, from user H1. This allows for smooth communication between user H1 and user H2. Furthermore, the user H1 can be prevented from feeling discomfort or fatigue due to light reflected on the first surface 301 of the transparent laminate film 30.

[0065] On the other hand, the second-side anti-reflection layer 50 is a layer for suppressing reflection of light incident from the second surface 302 of the transparent laminate film 30. By providing the transparent laminate film 30 with the second-side anti-reflection layer 50, light reflection on the second surface 302 of the transparent laminate film 30 can be suppressed. This improves the visibility of the figure of user H1, for example, when user H2, who is on the second surface 302 side of the transparent laminate film 30, visually recognizes user H1, who is on the first surface 301 side of the transparent laminate film 30. More specifically, when user H2 visually recognizes user H1, reflection of user H2's own face, etc., on the second surface 302 of the transparent laminate film 30 can be suppressed. This prevents user H2 from having difficulty visually recognizing user H1. This improves the visibility of user H1's facial expressions and lip movements, for example, from user H2. This allows for smooth communication between user H1 and user H2. Furthermore, the user H2 can be prevented from feeling discomfort or fatigue due to light reflected on the second surface 302 of the transparent laminate film 30.

[0066] As described above, the first-side antireflection layer 40 has a first-side antireflection functional layer 41 and a first-side transparent substrate layer 42. As described above, the second-side antireflection layer 50 has a second-side antireflection functional layer 51 and a second-side transparent substrate layer 52. Here, the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 will first be described.

[0067] [First surface transparent substrate layer and second surface transparent substrate layer] The first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 are layers that support the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51, for example, and also serve to increase the overall strength of the first-side antireflection layer 40 and the second-side antireflection layer 50. There are no particular restrictions on the material for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52, as long as they are transparent materials that are commonly used as substrates for films; however, from the standpoints of material cost, productivity, etc., plastic films, plastic sheets, etc. are preferably used, and these can be selected appropriately depending on the application.

[0068] Examples of materials for plastic films or sheets include various synthetic resins. Preferred examples of synthetic resins include cellulose resins such as triacetyl cellulose (TAC), diacetyl cellulose, acetate butyrate cellulose, and cellophane; polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate-isophthalate copolymer, and polyester-based thermoplastic elastomers; polyolefin resins such as low-density polyethylene (including linear low-density polyethylene), medium-density polyethylene, high-density polyethylene, ethylene-α-olefin copolymer, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, olefin-based thermoplastic elastomers, and mixtures thereof; acrylic resins such as polymethyl(meth)acrylate, polyethyl(meth)acrylate, and polybutyl(meth)acrylate; polyamide resins such as nylon 6 and nylon 66; polystyrene resin; polycarbonate resin; polyarylate resin; and polyimide resin. Furthermore, the material of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 may be a cycloolefin polymer (COP) resin or a cycloolefin copolymer (COC) resin.

[0069] The first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 can be made of the above-mentioned plastic films and plastic sheets, either alone or as a mixture of two or more of them, but from the viewpoints of flexibility, toughness, transparency, etc., cellulose resin and polyester resin are more preferred as the materials for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52. Furthermore, from the viewpoints of flexibility, toughness, transparency, etc., the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 preferably contain triacetyl cellulose and polyethylene terephthalate.

[0070] The thicknesses of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 are not particularly limited and can be appropriately selected depending on the application. The thicknesses of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 may each be approximately 5 μm to 130 μm, and preferably 10 μm to 100 μm in consideration of durability, handleability, and the like. The thickness of each layer can be calculated by measuring the thickness at three locations on a cross-sectional image taken using, for example, a scanning electron microscope (SEM) or a scanning transmission electron microscope (STEM) and averaging the values ​​at the three locations. When the film thickness to be measured is on the order of μm, it is preferable to use an SEM. When the film thickness is on the order of nm, it is preferable to use an STEM. When using an SEM, the acceleration voltage is preferably 1 kV to 10 kV, and when using an STEM, the acceleration voltage is preferably 10 kV to 30 kV. The film thickness of each layer described below can also be measured using the same method as for the film thickness of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52.

[0071] [First-side anti-reflection functional layer and second-side anti-reflection functional layer] Next, we will explain the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51. The first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 serve to impart the function of suppressing light reflection to the first-side antireflection layer 40 and the second-side antireflection layer 50, respectively.

[0072] Furthermore, the first-side antireflection functional layer 41 may be a coating layer coated on the first-side transparent substrate layer 42, and the second-side antireflection functional layer 51 may be a coating layer coated on the second-side transparent substrate layer 52. In this way, by having the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 be coating layers, the thicknesses of the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 can be easily controlled, and desired functions such as the light reflectance and total light transmittance of the transparent laminate film 30 can be easily controlled.

[0073] The first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 are preferably made of a cured product containing an acrylic monomer, which allows the first-side antireflection functional layer 41 and the second-side antireflection functional layer 51 to be formed with high uniformity even with short processing times.

[0074] Here, as described above, the first-side antireflection functional layer 41 includes the first-side refractive layer 43 and the first-side hard coat layer 44. Also, as described above, the second-side antireflection functional layer 51 includes the second-side refractive layer 53 and the second-side hard coat layer 54. The first-side hard coat layer 44 may be a coating layer coated on the first-side transparent substrate layer 42, and the first-side refractive layer 43 may be a coating layer coated on the first-side hard coat layer 44. Also, the second-side hard coat layer 54 may be a coating layer coated on the second-side transparent substrate layer 52, and the second-side refractive layer 53 may be a coating layer coated on the second-side hard coat layer 54. In this way, since the first surface refraction layer 43, the first surface hard coat layer 44, the second surface refraction layer 53 and the second surface hard coat layer 54 are coating layers, the thickness of each layer can be easily controlled, and desired functions such as the light reflectance, total light transmittance and, in some cases, color of the transparent laminate film 30 can be easily controlled.

[0075] Next, the first-side hard coat layer 44 and the second-side hard coat layer 54 will be described.

[0076] {First-side hard coat layer and second-side hard coat layer} The first-side hard coat layer 44 and the second-side hard coat layer 54 serve to improve the scratch resistance of the first-side antireflection layer 40 and the second-side antireflection layer 50. Here, "hard coat" refers to a property that exhibits a hardness of "H" or higher in the pencil hardness test specified in JIS K5600-5-4:1999. The first-side hard coat layer 44 and the second-side hard coat layer 54 can be formed, for example, from a hard coat layer coating liquid containing a curable resin composition. Examples of curable resin compositions include thermosetting resin compositions and ionizing radiation-curable resin compositions, with ionizing radiation-curable resin compositions being preferred from the viewpoint of scratch resistance.

[0077] A thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that cures when heated. Examples of thermosetting resins include acrylic resins, urethane resins, phenolic resins, urea-melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. In a thermosetting resin composition, a curing agent is added to the curable resin as needed.

[0078] The ionizing radiation-curable resin composition is a composition containing a compound having an ionizing radiation-curable functional group (hereinafter also referred to as "ionizing radiation-curable compound"). Examples of the ionizing radiation-curable functional group include ethylenically unsaturated bond groups such as (meth)acryloyl groups, vinyl groups, and allyl groups, as well as epoxy groups and oxetanyl groups. The ionizing radiation-curable compound is preferably a compound having an ethylenically unsaturated bond group, more preferably a compound having two or more ethylenically unsaturated bond groups, and even more preferably a polyfunctional (meth)acrylate compound having two or more ethylenically unsaturated bond groups. Both monomers and oligomers can be used as the polyfunctional (meth)acrylate compound. Ionizing radiation refers to electromagnetic waves or charged particle beams that have an energy quantum capable of polymerizing or crosslinking molecules, among electromagnetic waves or charged particle beams. Ultraviolet (UV) rays or electron beams (EB) are typically used, but other types of electromagnetic waves such as X-rays and gamma rays, as well as charged particle beams such as alpha rays and ion beams, can also be used.

[0079] Among the polyfunctional (meth)acrylate compounds, examples of bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexanediol diacrylate. Examples of trifunctional or higher functional (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, and isocyanuric acid-modified tri(meth)acrylate. The (meth)acrylate monomers may be monomers whose molecular skeletons are partially modified, or may be monomers modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like.

[0080] Examples of polyfunctional (meth)acrylate oligomers include acrylate polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate. Urethane (meth)acrylates can be obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with a hydroxy (meth)acrylate. Preferred epoxy (meth)acrylates include (meth)acrylates obtained by reacting a trifunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with (meth)acrylic acid; (meth)acrylates obtained by reacting a difunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a polybasic acid and (meth)acrylic acid; and (meth)acrylates obtained by reacting a difunctional or higher aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like with a phenol and (meth)acrylic acid. The above ionizing radiation-curable compounds can be used alone or in combination of two or more.

[0081] When the ionizing radiation-curable compound is an ultraviolet-curable compound, the ionizing radiation-curable composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator. Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyl methyl ketal, benzoyl benzoate, α-acyloxime ester, thioxanthones, and the like. These photopolymerization initiators preferably have a melting point of 100°C or higher. By adjusting the melting point of the photopolymerization initiator to 100°C or higher, it is possible to prevent the residual photopolymerization initiator from sublimating due to the heat generated during the transparent conductive film formation or crystallization process, thereby preventing the reduction in resistance of the transparent conductive film from being impaired. The same applies when using photopolymerization initiators in the high refractive index layer and low refractive index layer described below. The photopolymerization accelerator is a material that can reduce polymerization inhibition caused by air during curing and increase the curing speed, and examples thereof include one or more types selected from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, etc.

[0082] The thickness of each of the first-side hard coat layer 44 and the second-side hard coat layer 54 is preferably in the range of 0.1 μm to 100 μm, and more preferably in the range of 0.8 μm to 20 μm. If the thicknesses of the first-side hard coat layer 44 and the second-side hard coat layer 54 are within the above ranges, sufficient hard coat performance is obtained, and the layer is resistant to cracks and breakage due to external impacts.

[0083] The refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 is preferably smaller than the refractive index of the first-side high refractive index layer 46 and the second-side high refractive index layer 56, more preferably 1.45 to 1.70, and even more preferably 1.45 to 1.60. When the refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 falls within this range, the first-side hard coat layer 44 and the second-side hard coat layer 54 each function as a medium refractive index layer. This enables interference between the three layers of the first-side hard coat layer 44, first-side high refractive index layer 46, and first-side low refractive index layer 45, as well as interference between the three layers of the second-side hard coat layer 54, second-side high refractive index layer 56, and second-side low refractive index layer 55. This effectively suppresses light reflection. Furthermore, from the viewpoint of suppressing interference fringes, it is preferable to reduce the difference between the refractive index of the first-side hard coat layer 44 and the second-side hard coat layer 54 and the refractive index of the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52.

[0084] Methods for imparting the first-side hard coat layer 44 and the second-side hard coat layer 54 with the function of a medium refractive index layer include blending a high-refractive index resin into the hard coat layer coating solution and blending high-refractive index particles. Blending high-refractive index particles can cause whitening or coating defects due to particle aggregation, so the former method (blending a high-refractive index resin) is preferred. Examples of high-refractive index resins include the above-mentioned thermosetting resins or ionizing radiation-curable compounds into which sulfur-, phosphorus-, or bromine-containing groups or aromatic rings have been introduced. The high-refractive index particles can be similar to those used in the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56 described below.

[0085] The refractive index of each layer, such as the first-side hard coat layer 44 and the second-side hard coat layer 54, can be calculated, for example, by fitting a reflection spectrum measured with a reflectance photometer to a reflection spectrum calculated from an optical model of a multilayer thin film using Fresnel coefficients.

[0086] The first-side hard coat layer 44 and the second-side hard coat layer 54 can be formed by preparing a coating liquid for forming a hard coat layer using the above-mentioned curable resin composition, additives such as an ultraviolet absorber and a leveling agent which are blended as necessary, and a dilution solvent, applying the coating liquid onto a transparent substrate by a conventionally known coating method, drying the coating liquid, and curing it by irradiation with ionizing radiation as necessary.

[0087] {First surface refractive layer and second surface refractive layer} Next, the first-side refractive layer 43 and the second-side refractive layer 53 will be described. The first-side refractive layer 43 and the second-side refractive layer 53 serve to reduce the light reflectance of the first-side antireflection layer 40 and the second-side antireflection layer 50. As described above, the first-side refractive layer 43 includes a first-side low-refractive index layer 45 and a first-side high-refractive index layer 46. As described above, the second-side refractive layer 53 includes a second-side low-refractive index layer 55 and a second-side high-refractive index layer 56. Here, the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 will first be described.

[0088] (First surface low refractive index layer and second surface low refractive index layer) The first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 are layers provided on the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56, and use the difference in refractive index between them to reduce the light reflectance of the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 through interference. In order to provide the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50 with ultra-low reflectance, the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 preferably have a refractive index of 1.26 or more and 1.40 or less, more preferably 1.28 or more and 1.38 or less, and even more preferably 1.30 or more and 1.32 or less. The lower the refractive index of the first-side low refractive index layer 45 and the second-side low refractive index layer 55, the lower the refractive index of the first-side antireflection layer 40 and the second-side antireflection layer 50 can be without significantly increasing the refractive index of the first-side high refractive index layer 46 and the second-side high refractive index layer 56. On the other hand, if the refractive index of the first-side low refractive index layer 45 and the second-side low refractive index layer 55 is made too low, the strength of the first-side low refractive index layer 45 and the second-side low refractive index layer 55 tends to decrease. Therefore, by setting the refractive index of the first-side low refractive index layer 45 and the second-side low refractive index layer 55 within the above ranges, the amount of high refractive index particles (described below) added to the first-side high refractive index layer 46 and the second-side high refractive index layer 56 can be reduced while maintaining the strength of the first-side low refractive index layer 45 and the second-side low refractive index layer 55, which is advantageous in that it leads to suppression of color and whitening. The thickness of each of the first-side low refractive index layer 45 and the second-side low refractive index layer 55 is preferably 80 nm to 120 nm, more preferably 85 nm to 110 nm, and even more preferably 90 nm to 105 nm. The first-side low refractive index layer 45 and the second-side low refractive index layer 55 may each be formed from multiple layers satisfying the above-mentioned refractive index ranges, but from the viewpoint of cost-effectiveness, two or less layers are preferred, and a single layer is more preferred.

[0089] Methods for forming the first-side low refractive index layer 45 and the second-side low refractive index layer 55 can be broadly divided into wet methods and dry methods. Wet methods include a sol-gel method using a metal alkoxide or the like, a method of applying a low refractive index resin such as a fluororesin, and a method of applying a low refractive index layer-forming coating liquid in which low refractive index particles are incorporated into a resin composition. Dry methods include a method of selecting particles having a desired refractive index from the low refractive index particles described below and forming the layers by physical vapor deposition or chemical vapor deposition. Wet methods are superior in terms of production efficiency, and in this embodiment, among wet methods, it is preferable to form the layers using a low refractive index layer-forming coating liquid in which low refractive index particles are incorporated into a resin composition.

[0090] Low refractive index particles are preferably used to reduce the refractive index, i.e., to improve antireflection properties. Either inorganic particles such as silica or magnesium fluoride, or organic particles can be used without any restrictions. However, from the viewpoint of further improving antireflection properties and ensuring good surface hardness, particles having a structure in which the particles themselves have voids are preferably used.

[0091] Particles with a porous structure have microscopic voids inside, which are filled with a gas such as air with a refractive index of 1.0, resulting in a low refractive index. Examples of such porous particles include inorganic or organic porous particles and hollow particles, such as porous silica, hollow silica particles, and porous polymer particles or hollow polymer particles made from acrylic resins. Preferred examples of inorganic particles include porous silica particles prepared using the technology disclosed in JP-A-2001-233611. Preferred examples of organic particles include hollow polymer particles prepared using the technology disclosed in JP-A-2002-80503. The refractive index of the porous silica or porous silica described above is in the range of 1.18 to 1.44, which is lower than that of typical silica particles, which have a refractive index of around 1.45. Therefore, these silica particles are preferred from the perspective of achieving a low refractive index for the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55.

[0092] The hollow silica particles are particles that have the function of lowering the refractive index of the first-surface low refractive index layer 45 and the second-surface low refractive index layer 55 while maintaining their coating strength. The hollow silica particles used in this embodiment are silica particles with a structure having internal cavities. The hollow silica particles are silica particles whose refractive index decreases in inverse proportion to the occupancy rate of the internal cavities compared to the inherent refractive index of the silica particles (refractive index n = approximately 1.45). Therefore, the refractive index of the hollow silica particles as a whole is 1.18 or more and 1.44 or less.

[0093] The hollow silica particles are not particularly limited, and examples thereof include particles having an outer shell and a porous or hollow interior, such as silica particles prepared using the techniques disclosed in JP-A-6-330606, JP-A-7-013137, JP-A-7-133105, and JP-A-2001-233611.

[0094] The average particle diameter of the primary particles of the low-refractive-index particles is preferably 5 nm to 200 nm, more preferably 5 nm to 100 nm, and even more preferably 10 nm to 80 nm. When the average particle diameter of the primary particles is within the above range, the transparency of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is not impaired and a good particle dispersion state is obtained. In particular, hollow particles having an average particle diameter of 70 nm to 80 nm are preferred because they can increase the porosity and reduce the refractive index while maintaining a shell thickness that does not result in insufficient strength, and also provide an excellent balance with the ideal thickness (approximately 100 nm) of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 for reducing reflectance.

[0095] The low-refractive-index particles used in this embodiment are preferably surface-treated particles. Surface treatment of the low-refractive-index particles is more preferably performed using a silane coupling agent, and among these, surface treatment using a silane coupling agent having a (meth)acryloyl group is preferred. By performing a surface treatment on the low-refractive-index particles, the affinity with the binder resin described below is improved, the particles are uniformly dispersed, and aggregation of particles is less likely to occur. This prevents a decrease in the transparency of the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 due to particle size increase caused by aggregation, as well as a decrease in the applicability of the layer-forming composition and the coating strength of the composition.

[0096] Furthermore, when the silane coupling agent has a (meth)acryloyl group, the silane coupling agent is ionizing radiation-curable and therefore readily reacts with the binder resin described below, thereby effectively fixing the low-refractive index particles to the binder resin in the coating film of the layer-forming composition. In other words, the low-refractive index particles function as a crosslinker in the binder resin. This provides a tightening effect for the entire coating film, imparting excellent surface hardness to the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 while retaining the inherent flexibility of the binder resin. Therefore, the first-side low-refractive index layer 45 and the second-side low-refractive index layer 55 utilize their own flexibility to deform, providing them with the ability to absorb and restore external impacts, thereby reducing the occurrence of scratches and resulting in a layer with high surface hardness and excellent scratch resistance.

[0097] Examples of silane coupling agents that are preferably used in the surface treatment of low refractive index particles include 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, 3-(meth)acryloxypropylmethyldiethoxysilane, 2-(meth)acryloxypropyltrimethoxysilane, and 2-(meth)acryloxypropyltriethoxysilane.

[0098] The content of low-refractive-index particles in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is preferably 10 to 250 parts by mass, more preferably 50 to 200 parts by mass, and even more preferably 100 to 180 parts by mass, per 100 parts by mass of the resin in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55. When the content of low-refractive-index particles falls within the above range, good anti-reflection properties and surface hardness are obtained. Furthermore, the proportion of hollow particles and / or porous particles in the total low-refractive-index particles contained in the first-side low-refractive-index layer 45 and the second-side low-refractive-index layer 55 is preferably 70% by mass or more, more preferably 80% by mass or more, and even more preferably 80% by mass or more and 95% by mass or less.

[0099] Resin compositions contained in the layer-forming coating liquid include, first, curable resin compositions. The curable resin compositions can be similar to the materials exemplified in the description of the first-side hard coat layer 44 and the second-side hard coat layer 54, with ionizing radiation-curable resin compositions being preferred. Furthermore, fluorine-containing polymers and fluorine monomers that themselves exhibit a low refractive index are also preferred resin compositions. Fluorine-containing polymers are polymers of polymerizable compounds that contain at least fluorine atoms in the molecule, and are suitable for imparting antifouling properties and slip properties. The fluorine-containing polymer is preferably a polymer that has reactive groups in the molecule and functions as a curable resin composition, and more preferably a polymer that has ionizing radiation-curable reactive groups and functions as an ionizing radiation-curable resin composition.

[0100] The fluorine-containing polymer is preferably a polymer containing silicon as well as fluorine, in order to not only repel dirt from the surface of the low refractive index layer but also to provide the repelled dirt with easy wiping properties. For example, a silicone-containing vinylidene fluoride copolymer, in which a silicone component is incorporated into the copolymer, is preferred. Examples of silicone components in this case include (poly)dimethylsiloxane, (poly)diethylsiloxane, (poly)diphenylsiloxane, (poly)methylphenylsiloxane, alkyl-modified (poly)dimethylsiloxane, azo-group-containing (poly)dimethylsiloxane, dimethylsilicone, phenylmethylsilicone, alkyl-aralkyl-modified silicone, fluorosilicone, polyether-modified silicone, fatty acid ester-modified silicone, methylhydrogen silicone, silanol-group-containing silicone, alkoxy-group-containing silicone, phenol-group-containing silicone, methacrylic-modified silicone, acrylic-modified silicone, amino-modified silicone, carboxylic acid-modified silicone, carbinol-modified silicone, epoxy-modified silicone, mercapto-modified silicone, fluorine-modified silicone, and polyether-modified silicone. Among these, components having a dimethylsiloxane structure are preferred as the silicone component.

[0101] The first-side low refractive index layer 45 and the second-side low refractive index layer 55 can be formed, for example, by preparing a layer-forming coating liquid using low refractive index particles, a resin composition, additives such as an ultraviolet absorber and a leveling agent, which are blended as necessary, and a dilution solvent, and then applying the coating liquid onto the first-side high refractive index layer 46 or the second-side high refractive index layer 56 by a conventionally known coating method, drying, and, if necessary, curing by exposure to ionizing radiation.

[0102] (First surface high refractive index layer and second surface high refractive index layer) The first-side high refractive index layer 46 and the second-side high refractive index layer 56 serve to reduce the light reflectance of the first-side antireflection layer 40 and the second-side antireflection layer 50 through interference, utilizing the difference in refractive index between them and the first-side low refractive index layer 45 and the second-side low refractive index layer 55. The first-side high refractive index layer 46 and the second-side high refractive index layer 56 can each be formed from a layer-forming coating liquid containing, for example, a curable resin composition and high refractive index particles.

[0103] The first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 preferably have a high refractive index from the viewpoint of achieving ultra-low reflectance for the first-side anti-reflection layer 40 and the second-side anti-reflection layer 50. However, a high refractive index requires a large amount of high-refractive-index particles, which can lead to aggregation of the high-refractive-index particles and cause whitening. For this reason, the refractive index is preferably 1.55 to 1.85, and more preferably 1.56 to 1.70. The thickness of the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 is preferably 200 nm or less, and more preferably 50 nm to 180 nm. When the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 each have a two-layer structure as described below, the total thickness of the two layers preferably satisfies the above-mentioned value. The first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 may be formed from multiple layers satisfying the above-mentioned refractive index range. However, from the viewpoint of cost-effectiveness, two or fewer layers are preferred, and a single layer is more preferred.

[0104] Examples of high-refractive-index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 to 2.7), cerium oxide (1.95), tin-doped indium oxide (1.95 to 2.00), antimony-doped tin oxide (1.75 to 1.85), yttrium oxide (1.87), and zirconium oxide (2.10). The parentheses indicate the refractive index of the material of each particle. Among these high-refractive-index particles, particles with a refractive index exceeding 2.0 are preferred, as they can achieve the desired refractive index with a small amount of addition. Furthermore, conductive high-refractive-index particles such as antimony pentoxide, tin-doped indium oxide (ITO), and antimony-doped tin oxide (ATO) have free electrons whose plasma frequency is in the near-infrared region. Due to the plasma oscillation of these free electrons, some light in the visible light region is absorbed or reflected, making it difficult to suppress color. For this reason, the high-refractive index particles are preferably non-conductive particles. For these reasons, among the high-refractive index particles exemplified above, titanium oxide and zirconium oxide are preferred, with zirconium oxide being the most suitable from the viewpoint of high durability and stability, such as light resistance. If it is desired to impart antistatic properties to the first-side antireflection layer 40 and the second-side antireflection layer 50, it is preferred that the first-side high-refractive index layer 46 and the second-side high-refractive index layer 56 have a two-layer structure, as described below, with conductive high-refractive index particles contained in one of the layers.

[0105] The average particle size of the primary particles of the high refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and even more preferably 10 nm or more and 80 nm or less. The average particle size of the primary particles of the high refractive index particles and the low refractive index particles described later can be calculated by the following steps (1) to (3). (1) Surface images of the particles themselves or of a material prepared by coating and drying a particle dispersion on a transparent substrate are taken using SEM, TEM, or STEM. (2) Randomly extract 10 particles from the surface image, measure the long and short diameters of each particle, and calculate the particle diameter of each particle from the average of the long and short diameters. The long diameter is the longest diameter on the screen, and the short diameter is the distance between the two points where a line segment perpendicular to the midpoint of the line segment that constitutes the long diameter intersects with the particle. (3) Repeat the same procedure five times on separate images of the same sample, and use the number average of the particle diameters of a total of 50 particles as the average particle diameter. When calculating the average particle size of particles, if the calculated average particle size is on the order of μm, it is preferable to use an SEM, and if the calculated average particle size is on the order of nm, it is preferable to use a transmission electron microscope (TEM) or STEM. In the case of an SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and in the case of a TEM or STEM, the acceleration voltage is preferably 10 kV or more and 30 kV or less.

[0106] From the viewpoint of a balance between increasing the refractive index, suppressing color tone, and suppressing whitening, the content of the high refractive index particles is preferably 30 parts by mass or more and 400 parts by mass or less, more preferably 50 parts by mass or more and 200 parts by mass or less, and even more preferably 80 parts by mass or more and 150 parts by mass or less, relative to 100 parts by mass of the curable resin composition.

[0107] The first-surface high-refractive-index layer 46 and the second-surface high-refractive-index layer 56 are preferably dispersion-stabilized to prevent excessive aggregation of the high-refractive-index particles. One example of a dispersion-stabilizing method is to add another high-refractive-index particle with a lower surface charge than the base high-refractive-index particle. This method allows the base high-refractive-index particles to moderately gather around the other high-refractive-index particle, thereby preventing excessive aggregation of the base high-refractive-index particles. Other dispersion-stabilizing methods include using surface-treated high-refractive-index particles or adding a dispersant to the layer-forming coating solution.

[0108] The curable resin compositions forming the first-side high refractive index layer 46 and the second-side high refractive index layer 56 can be similar to the materials exemplified in the description of the first-side hard coat layer 44 and the second-side hard coat layer 54, and an ionizing radiation-curable resin composition is preferred. Furthermore, to achieve the above-mentioned refractive index without adding an excessive amount of high refractive index particles, it is preferable to use a curable resin composition with a high refractive index. The refractive index of the curable resin composition is preferably approximately 1.54 or more and 1.70 or less.

[0109] As described above, the first-side high refractive index layer 46 may include a first first-side high refractive index layer 47 and a second first-side high refractive index layer 48. In this case, the refractive index of the first first-side high refractive index layer 47 is preferably higher than the refractive index of the second first-side high refractive index layer 48. This increases the difference in refractive index between the first-side high refractive index layer 46 and the first-side low refractive index layer 45, thereby reducing the reflectance of the first-side antireflection layer 40 and reducing the difference in refractive index between the first-side high refractive index layer 46 and the first-side hard coat layer 44, thereby suppressing the occurrence of interference fringes.

[0110] As described above, the second-side high refractive index layer 56 may include a first second-side high refractive index layer 57 and a second second-side high refractive index layer 58. In this case, as with the first-side high refractive index layer 46, it is preferable that the refractive index of the first second-side high refractive index layer 57 be higher than the refractive index of the second second-side high refractive index layer 58. This increases the refractive index difference between the second-side high refractive index layer 56 and the second-side low refractive index layer 55, thereby reducing the reflectance of the second-side anti-reflection layer 50 and reducing the refractive index difference between the second-side high refractive index layer 56 and the second-side hard coat layer 54, thereby suppressing the occurrence of interference fringes.

[0111] Furthermore, when the first-side high-refractive-index layer 46 and the second-side high-refractive-index layer 56 each have a two-layer structure, the refractive index of the first first-side high-refractive-index layer 47 and the first second-side high-refractive-index layer 57 is preferably 1.60 or more and 1.85 or less, and the refractive index of the second first-side high-refractive-index layer 48 and the second second-side high-refractive-index layer 58 is preferably 1.55 or more and 1.70 or less. Furthermore, in the two-layer structure, it is preferable that one layer contains conductive high-refractive-index particles and the other layer contains non-conductive high-refractive-index particles, and that the thickness of the layer containing the conductive high-refractive-index particles is less than the thickness of the layer containing the non-conductive high-refractive-index particles. This structure can impart antistatic properties while minimizing the amount of conductive high-refractive-index particles, which can cause color tint. Furthermore, conductive high-refractive-index particles are preferably networked within the layer to impart antistatic properties with a small amount, thereby suppressing color tint and whitening.

[0112] The first-side high refractive index layer 46 and the second-side high refractive index layer 56 can be formed by preparing a layer-forming coating liquid using high refractive index particles, a curable resin composition, and additives such as an ultraviolet absorber and a leveling agent, which are blended as necessary, and a dilution solvent, and then applying the coating liquid onto the first-side hard coat layer 44 or the second-side hard coat layer 54 by a conventionally known coating method, drying the coating liquid, and curing it by irradiation with ionizing radiation as necessary.

[0113] [Transparent adhesive layer, first transparent adhesive layer, and second transparent adhesive layer] Transparent adhesive layers such as the transparent adhesive layer 31, the first transparent adhesive layer 31a, and the second transparent adhesive layer 31b are layers for bonding the first-side antireflection layer 40, the second-side antireflection layer 50, the core layer 32, and the like to one another. Here, the term "transparent adhesive layer" in this specification encompasses a transparent adhesive layer. Transparent adhesive layers can be formed using various materials commonly used as adhesives. Examples include acrylic adhesives, urethane adhesives, olefin adhesives, rubber adhesives, silicone adhesives, and polyester adhesives. Acrylic adhesives, which have high transparency and can increase adhesive strength, are preferred.

[0114] Each of the above adhesives can contain various functionalizing agents, stabilizers, etc., as long as transparency is not impaired. Tackifiers can also be added to enhance adhesive strength. Crosslinking agents, such as isocyanates, epoxies, and double-bond-containing compounds, can be used to form crosslinked structures depending on the resin.

[0115] The transparent adhesive layer can also be formed using a type of adhesive (OCA, Optical Clear Adhesive) laminated on both sides with a release film. Commercially available products can also be used as the transparent adhesive layer. Examples of commercially available products that can be used as the transparent adhesive layer include the LUCIACS series of optically transparent adhesive sheets (manufactured by Nitto Denko Corporation), the 5400A series of highly transparent double-sided tapes (manufactured by Sekisui Chemical Co., Ltd.), the Opteria series of optical adhesive sheets (manufactured by Lintec Corporation), the SANCUARY series (manufactured by San-A Kaken Co., Ltd.), the OAD series of optically transparent adhesives (manufactured by Toyo Packaging Co., Ltd.), the RA series of optical coreless double-sided tapes (manufactured by Sumiron Co., Ltd.), and the PD-S1 series of Panaclean adhesives (manufactured by Panac Corporation). The adhesive strength of these adhesives is generally 10 N / 25 mm or more.

[0116] The thickness of the transparent adhesive layer is not particularly limited, but is preferably, for example, 2 μm or more and 200 μm or less. If the thickness of the transparent adhesive layer is 2 μm or more, the first-side antireflection layer 40, the second-side antireflection layer 50, etc. can be reliably bonded, and if the thickness of the transparent adhesive layer is 200 μm or less, transparency (light transmittance) can be maintained. The lower limit of the thickness of the transparent adhesive layer is more preferably 5 μm or more, 10 μm or more, or 15 μm or more, and the upper limit is more preferably 150 μm or less, 160 μm or less, or 170 μm or less.

[0117] The method for forming the transparent adhesive layer is not particularly limited, and can employ known methods used in the production of pressure-sensitive adhesive tapes, etc. Specifically, the transparent adhesive layer can be formed by any method, such as a method in which a coating of a pressure-sensitive adhesive composition prepared by dissolving or dispersing the components forming the transparent adhesive layer in an appropriate organic solvent or water is applied to the surface of a substrate, followed by drying and curing, a method in which the components forming the transparent adhesive layer, a double bond-containing monomer, an oligomer, a crosslinking agent, etc. are applied to a substrate without a solvent, and then crosslinked by radiation or the like, or an extrusion lamination method.

[0118] When using OCA, a transparent adhesive layer can be formed by peeling off the release film on the light release side of the OCA and bonding the adhesive surface to the substrate.

[0119] [Core layer] The core layer 32 serves to support the first-side antireflection layer 40 and the second-side antireflection layer 50. As the material for the core layer 32, the same materials as those for the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52 described above can be used.

[0120] There are no particular limitations on the thickness of the core layer 32 and it is selected appropriately depending on the application. The thickness of the core layer 32 may be approximately 5 μm or more and 130 μm or less, and considering durability, handling, etc., it is preferably 10 μm or more and 100 μm or less.

[0121] The thickness of the transparent laminate film 30 described above is preferably 300 μm or less. By making the thickness of the transparent laminate film 30 300 μm or less, it is possible to improve the transparency of the transparent laminate film 30. From the viewpoint of improving transparency and making conversations easier to hear, the thickness of the transparent laminate film 30 is more preferably 260 μm or less, and even more preferably 200 μm or less.

[0122] From the viewpoint of reducing the thickness of the transparent laminate film 30, the transparent laminate film 30 not including the core layer 32 as shown in Figures 2A and 2B is preferable to the transparent laminate film 30 including the core layer 32 as shown in Figures 2C and 2D. The transparent laminate film 30 not including the core layer 32 as shown in Figures 2A and 2B makes it particularly easy to reduce the thickness of the transparent laminate film 30 to 200 μm or less.

[0123] Note that if the upper limit of the thickness of the transparent laminate film 30 is limited as described above, the transparent laminate film 30 will be easily bent. On the other hand, from the viewpoint of preventing the occurrence of wrinkles (wavy shapes) on the surface of the transparent laminate film 30 due to wind or the like, it is preferable that the transparent laminate film 30 be less likely to bend beyond a certain level. By preventing the occurrence of wrinkles (wavy shapes) on the surfaces (first surface 301, second surface 302) of the transparent laminate film 30, it is possible to prevent the users H1 and H2 from having difficulty in seeing each other due to the wrinkles (wavy shapes).

[0124] The thickness of the transparent laminate film 30 may be, for example, 60 μm or more and 300 μm or less. When the thickness of the transparent laminate film 30 is 60 μm or more, the transparent laminate film 30 becomes less likely to bend, to the extent that the occurrence of wrinkles (wavy shapes) on the surface of the transparent laminate film 30 is suppressed. Furthermore, when the thickness of the transparent laminate film 30 is 60 μm or more, the movement of droplets such as saliva between users H1 and H2 facing each other across the partition 10 can be effectively suppressed. Furthermore, when the thickness of the transparent laminate film 30 is 300 μm or less, it becomes easier to hear what the other person is saying when conversing through the partition 10.

[0125] The height (vertical distance) of the transparent laminate film 30 may be, for example, 300 mm to 900 mm, and preferably 450 mm to 700 mm. The width (horizontal distance) of the transparent laminate film 30 may be, for example, 300 mm to 1800 mm, and preferably 450 mm to 1200 mm.

[0126] The above-described transparent laminate film 30 has a bending stress of, for example, 6 N / 20 mm or less.

[0127] By using the above-described transparent laminate film 30 in the partition 10, light reflection in the partition 10 is suppressed. For example, light reflection is suppressed more than in a partition that uses a partition panel made of a general acrylic plate. Furthermore, by using the above-described transparent laminate film 30 in the partition 10, the transparency of the partition 10 is improved. For example, the transparency of the partition 10 is improved more than in a partition that uses a partition panel made of a general acrylic plate.

[0128] The light reflectance of the transparent laminate film 30 described above is preferably 3.0% or less. Here, the light reflectance of the transparent laminate film 30 refers to both the reflectance of light incident from the first surface 301 side of the transparent laminate film 30 and the reflectance of light incident from the second surface 302 side of the transparent laminate film 30. In other words, a light reflectance of 3.0% or less means that the reflectance of light incident from the first surface 301 side of the transparent laminate film 30 is 3.0% or less, and the reflectance of light incident from the second surface 302 side of the transparent laminate film 30 is 3.0% or less. This further improves the visibility of the transparent laminate film 30 when viewed from the first surface 301 side and when viewed from the second surface 302 side. The light reflectance is more preferably 1.0% or less.

[0129] The transparent laminate film 30 preferably has a total light transmittance (JIS K7361-1:1997) of 90% or more. This further improves the visibility of the transparent laminate film 30 when viewed from the first surface 301 side, while also further improving the visibility of the transparent laminate film 30 when viewed from the second surface 302 side. The transparent laminate film 30 more preferably has a total light transmittance of 92% or more, and even more preferably 95% or more. The transparent laminate film 30 preferably has a haze (JIS K7136:2000) of 3.0% or less, more preferably 2.0% or less, and even more preferably 1.5% or less.

[0130] In the above-described transparent laminate film 30, the arithmetic mean roughness Ra (JIS B0601:1994) of each of the first surface 301 and the second surface 302 is preferably 10 nm or less, and more preferably 1 nm or more and 8 nm or less. Furthermore, the ten-point mean roughness Rz (JIS B0601:1994) of each of the first surface 301 and the second surface 302 is preferably 160 nm or less, and more preferably 50 nm or more and 155 nm or less. When Ra and Rz are within the above ranges, the first surface 301 and the second surface 302 have smoothness and improved scratch resistance.

[0131] The puncture strength of the above-described transparent laminate film 30 is preferably 10.0 N or more. A sufficiently high puncture strength ensures sufficient strength to prevent breakage of the transparent laminate film 30 when the transparent laminate film 30 is used for the partition 10. A method for measuring the puncture strength will be described in Example 1 below.

[0132] As described above, such a partition 10 can be placed in a room R, such as a conference room or meeting space, and used to divide the space of the room R (see FIGS. 1A and 1B). In this embodiment, a building B equipped with such a partition 10 is also provided.

[0133] Transparent laminate film and method for manufacturing partition Next, a method for manufacturing the transparent laminate film 30 and the partition 10 according to this embodiment will be described. First, a method for manufacturing the transparent laminate film 30 will be described.

[0134] First, first-side antireflection layer 40 is prepared. In this process, for example, a resin film constituting first-side transparent substrate layer 42 is first prepared. Next, a hard coat layer-forming coating liquid is applied to the resin film, dried, and irradiated with ultraviolet light to form first-side hard coat layer 44. Next, a high refractive index layer-forming coating liquid is applied to first-side hard coat layer 44, dried, and irradiated with ultraviolet light to form first-side high refractive index layer 46. Next, a low refractive index layer-forming coating liquid is applied to first-side high refractive index layer 46, dried, and irradiated with ultraviolet light to form first-side low refractive index layer 45. In this manner, first-side antireflection layer 40 is obtained.

[0135] Second-side antireflection layer 50 is also prepared. In this process, for example, first, a resin film constituting second-side transparent substrate layer 52 is prepared. Next, a hard coat layer-forming coating liquid is applied to the resin film, dried, and irradiated with ultraviolet light to form second-side hard coat layer 54. Next, a high refractive index layer-forming coating liquid is applied to second-side hard coat layer 54, dried, and irradiated with ultraviolet light to form second-side high refractive index layer 56. Next, a low refractive index layer-forming coating liquid is applied to second-side high refractive index layer 56, dried, and irradiated with ultraviolet light to form second-side low refractive index layer 55. In this manner, second-side antireflection layer 50 is obtained.

[0136] Then, the first-side antireflection layer 40 and the second-side antireflection layer 50 are bonded to each other via the transparent adhesive layer 31 to produce the transparent laminate film 30. In this manner, the transparent laminate film 30 can be produced.

[0137] Next, a first-side protective film 61 is attached to the first side 301 of the obtained transparent laminate film 30, and a second-side protective film 62 is attached to the second side 302. At this time, the first-side protective film 61 and the second-side protective film 62 may each include an adhesive layer (not shown) and be attached to the transparent laminate film 30 by this adhesive layer. In this manner, the transparent laminate film 60 with protective films can be produced. Note that the first-side protective film 61 and the second-side protective film 62 may be attached separately to the first-side antireflection layer 40 and the second-side antireflection layer 50, respectively, before the first-side antireflection layer 40 and the second-side antireflection layer 50 are bonded to each other via the transparent adhesive layer 31.

[0138] Next, the partition 10 is created.

[0139] In this process, first, the protective film-attached transparent laminate film 60 is processed into a predetermined shape. When producing the partition 10 shown in Figures 1A and 1B, the protective film-attached transparent laminate film 60 is cut into a rectangular shape having a pair of first sides 30a and a pair of second sides 30b.

[0140] Next, the first surface protective film 61 and the second surface protective film 62 are removed from the protective film-attached transparent laminate film 60 that has been processed into a predetermined shape, thereby obtaining the transparent laminate film 30 that has been processed into a predetermined shape.

[0141] Thereafter, the transparent laminate film 30 is supported by the film support part 70. At this time, the transparent laminate film 30 is supported by the film support part 70 in a state in which the first surface 301 and the second surface 302 are flattened. In addition, the stand part 90 is connected to the film support part 70. In this way, the partition 10 is produced.

[0142] As described above, according to this embodiment, the partition 10 includes a transparent laminate film 30 having a first surface 301 and a second surface 302, and a film support portion 70 that supports the transparent laminate film 30. The transparent laminate film 30 includes a first-surface antireflection layer 40 that forms the first surface 301 and a second-surface antireflection layer 50 that forms the second surface 302. This configuration suppresses reflection of light incident from the first surface 301 side of the transparent laminate film 30 and reflection of light incident from the second surface 302 side of the transparent laminate film 30. This improves visibility of the transparent laminate film 30 when viewed from the first surface 301 side and the second surface 302 side. This allows users H1 and H2, who are facing each other across the partition 10, to easily recognize each other. This allows for smooth communication between users H1 and H2. Furthermore, the users H1 and H2 can be prevented from feeling discomfort or fatigue due to light reflected on the first surface 301 or the second surface 302 of the transparent laminate film 30.

[0143] Furthermore, since the partition 10 is provided with the transparent laminate film 30, it is possible to make it easier to hear what the other person is saying when conversing through the partition 10. This allows for smooth communication between the users H1 and H2. The fact that the above-mentioned effects can be achieved will be explained in the examples below.

[0144] Furthermore, according to the present embodiment, the transparent laminate film 30 further includes a core layer 32 located between the first-side antireflection layer 40 and the second-side antireflection layer 50. This improves the durability and handleability of the transparent laminate film 30.

[0145] Furthermore, according to this embodiment, the transparent laminate film 30 includes a first transparent adhesive layer 31a that bonds the first-side antireflection layer 40 and the core layer 32, and a second transparent adhesive layer 31b that bonds the core layer 32 and the second-side antireflection layer 50. This makes it possible to easily produce a transparent laminate film 30 that includes the core layer 32 located between the first-side antireflection layer 40 and the second-side antireflection layer 50.

[0146] Furthermore, according to the present embodiment, the transparent laminate film 30 further includes a transparent adhesive layer 31 that bonds the first-side antireflection layer 40 and the second-side antireflection layer 50 together. This makes it possible to easily produce a transparent laminate film 30 that includes the first-side antireflection layer 40 and the second-side antireflection layer 50.

[0147] Furthermore, according to the present embodiment, the film support portion 70 supports the transparent laminate film 30 in a flattened state. This makes it possible to prevent bending of the transparent laminate film 30. As a result, it is possible to effectively prevent light reflection from the transparent laminate film 30.

[0148] Furthermore, according to this embodiment, the partition 10 further includes a stand portion 90 that supports the film support portion 70 so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G. This allows the film support portion 70 to be supported so that the first surface 301 of the transparent laminate film 30 is perpendicular to the horizontal plane G.

[0149] Variations Next, a modified example of the partition will be described.

[0150] (First Modification) 3 to 10, the transparent laminate film 30 is loosely held by the film support portion 70. In this case, the transparent laminate film 30 is supported by the film support portion 70 in a state in which it is movable relative to the film support portion 70.

[0151] 3 and 4, the film support part 70 has a first member 81 located on the first surface 301 side of the transparent laminate film 30, and a second member 82 located on the second surface 302 side of the transparent laminate film 30. In this modification, the transparent laminate film 30 is supported by the film support part 70 by being inserted between the first member 81 and the second member 82.

[0152] The first member 81 and the second member 82 each have a generally rectangular frame shape. That is, the first member 81 includes an upper side portion 81a, a lower side portion 81b, and a pair of side portions 81c extending between the upper side portion 81a and the lower side portion 81b. Similarly, the second member 82 includes an upper side portion 82a, a lower side portion 82b, and a pair of side portions 82c extending between the upper side portion 82a and the lower side portion 82b.

[0153] In this modified example, a pair of first portions 71 and a pair of second portions 72 extending between the pair of first portions 71 are formed by a first member 81 and a second member 82. That is, the first portion 71 is formed by side edge portions 81c and 82c. The upper second portion 72 of the pair of second portions 72 is formed by upper edge portions 81a and 82a, and the lower second portion 72 of the pair of second portions 72 is formed by lower edge portions 81b and 82b. In this modified example, the lower second portion 72 of the pair of second portions 72 has a pair of legs 73 protruding downward. Each of the legs 73 has a rectangular prism shape. The legs 73 are inserted into the opening 95a of the stand 90.

[0154] 5, a first step portion 83 is formed in the first member 81. The first step portion 83 is formed on the inner surface 81d side of the first member 81 (the side facing the first surface 301). The first step portion 83 is formed around the entire periphery. This first step portion 83, together with a second step portion 84 of the second member 82 (described later), constitutes a first groove portion 75, a second groove portion 76, and an opening portion 77 (described later).

[0155] An inclined surface 83a is formed in the first step portion 83 at a position corresponding to the lower side portion 81b of the first member 81. This inclined surface 83a is inclined upward from the inner surface 81d side (the side facing the first surface 301) to the outer surface side.

[0156] Furthermore, a pair of first leg portions 85 that protrude downward are formed on the lower side portion 81b. Each of these first leg portions 85 has a rectangular prism shape. These first leg portions 85, together with second leg portions 86 (described later) of the second member 82, constitute the above-mentioned leg portion 73. Although not shown, the leg portion 73 may be constituted only by the first leg portions 85, without second leg portions 86 (described later) being formed on the lower side portion 82b.

[0157] 6, the second member 82 is formed with a second step portion 84. The second step portion 84 is formed on the inner surface 82d side of the second member 82 (the side facing the second surface 302). The second step portion 84 is also formed around the entire periphery. As described above, the second step portion 84, together with the first step portion 83 of the first member 81, constitutes the first groove portion 75, the second groove portion 76, and the opening portion 77, which will be described later.

[0158] Furthermore, a pair of second leg portions 86 that protrude downward are formed on the lower side portion 82b. Each of these second leg portions 86 has a rectangular prism shape. As described above, the second leg portions 86, together with the first leg portion 85 of the first member 81, constitute the above-mentioned leg portion 73. Although not shown, the above-mentioned first leg portion 85 may not be formed on the lower side portion 81b, and the leg portion 73 may be constituted only by the second leg portions 86.

[0159] In such a film support section 70, the first member 81 and the second member 82 are connected to each other with the inner surface 81d of the first member 81 facing the inner surface 82d of the second member 82. The manner in which the first member 81 and the second member 82 are connected to each other is not particularly limited. The first member 81 and the second member 82 may be connected to each other by, for example, screwing, welding, adhesive, or adhesive tape.

[0160] 7 and 8, in this modification, a first groove 75 into which the first side (side edge) 30a of the transparent laminate film 30 is inserted is formed in the film support portion 70. This first groove 75 extends in the up-down direction. As described above, the first groove 75 is composed of the first step portion 83 of the first member 81 and the second step portion 84 of the second member 82.

[0161] Furthermore, gaps S1a and S1b are formed between the transparent laminate film 30 and the first groove portion 75. Specifically, a gap S1a is formed between the transparent laminate film 30 and the first groove portion 75 in the thickness direction of the transparent laminate film 30 (the vertical direction in FIG. 7). A gap S1b is formed between the transparent laminate film 30 and the first groove portion 75 in the width direction of the transparent laminate film 30 (the horizontal direction in FIG. 7). In this manner, in this modification, the transparent laminate film 30 is inserted into the first groove portion 75 with some play. This allows the transparent laminate film 30 to be supported by the film support portion 70 while being movable relative to the film support portion 70.

[0162] In the illustrated example, the gap S1a is formed on both sides (the first surface 301 side and the second surface 302 side) in the thickness direction (the vertical direction in FIG. 7) of the transparent laminate film 30. The gap S1a may be formed only on the first surface 301 side of the transparent laminate film 30, or may be formed only on the second surface 302 side.

[0163] In the illustrated example, the gap S1b is formed on both sides in the width direction (left and right direction in FIG. 7) of the transparent laminate film 30. Note that the gap S1b may be formed on only one side in the width direction of the transparent laminate film 30.

[0164] The width w1 of the first groove portion 75 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. A width w1 of 0.5 mm or more allows for a larger gap S1a between the transparent laminate film 30 and the first groove portion 75. This prevents the transparent laminate film 30 from being fixed to the film support portion 70. A width w1 of 3 mm or less also prevents deformation of the transparent laminate film 30, such as bending in the vertical direction. A width w1 of 3 mm or less also prevents deformation of the transparent laminate film 30, such as bending in the horizontal direction (left-right direction in FIG. 7). In other words, deformation of the transparent laminate film 30, such as bending in the vertical and horizontal directions, can be prevented. This allows the first groove portion 75 to effectively support the transparent laminate film 30. The width of the gap S1b in the width direction of the transparent laminate film 30 may be 1 mm or more and 5 mm or less.

[0165] 9 and 10, the film support portion 70 is formed with a second groove 76 into which the lower second edge 30b (lower edge) of the pair of second edges 30b of the transparent laminate film 30 is inserted. The second groove 76 extends horizontally. As described above, the second groove 76 is formed by the first step 83 of the first member 81 and the second step 84 of the second member 82.

[0166] Here, a gap S2 is formed between the transparent laminate film 30 and the second groove portion 76. Specifically, the gap S2 is formed between the transparent laminate film 30 and the second groove portion 76 in the thickness direction of the transparent laminate film 30 (the left-right direction in FIGS. 9 and 10). In this manner, in this modified example, the transparent laminate film 30 is inserted into the second groove portion 76 with some play. As a result, the transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70.

[0167] In the illustrated example, the gap S2 is formed on both sides (the first surface 301 side and the second surface 302 side) in the thickness direction of the transparent laminate film 30. The gap S2 may be formed only on the first surface 301 side of the transparent laminate film 30, or may be formed only on the second surface 302 side.

[0168] The width w2 of the second groove portion 76 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. When the width w2 is 0.5 mm or more, the gap S2 between the transparent laminate film 30 and the second groove portion 76 can be made larger. This can prevent the transparent laminate film 30 from being fixed to the film support portion 70. Furthermore, when the width w2 is 3 mm or less, the transparent laminate film 30 can be effectively supported by the second groove portion 76.

[0169] The second groove 76 includes a first side surface 76a facing the first surface 301 and a second side surface 76b facing the second surface 302. The height h1 of the first side surface 76a is different from the height h2 of the second side surface 76b. This makes it easier to insert the second edge 30b of the transparent laminate film 30 into the second groove 76. In the illustrated example, the height h1 of the first side surface 76a is lower than the height h2 of the second side surface 76b. The difference between the height h1 of the first side surface 76a and the height h2 of the second side surface 76b may be 5 mm or more and 15 mm or less. When this difference is 5 mm or more, the second edge 30b of the transparent laminate film 30 can be easily inserted into the second groove 76. When this difference is 15 mm or less, the film support portion 70 (second portion 72) can be prevented from becoming too large. This prevents the film support portion 70 from being too conspicuous. This makes it easier for users H1 and H2, who face each other across the partition 10, to see each other.

[0170] The above-described inclined surface 83a is formed on the upper part of the first side surface 76a. This allows the second side 30b of the transparent laminate film 30 to be easily guided into the second groove portion 76 when the second side 30b comes into contact with the inclined surface 83a. Note that the height h1 of the first side surface 76a may be greater than the height h2 of the second side surface 76b, and an inclined surface may be formed on the upper part of the second side surface 76b.

[0171] 3, 4, and 9, an opening 77 is formed between an upper side portion 81a of the first member 81 and an upper side portion 82a of the second member 82, for inserting the transparent laminate film 30 between the first member 81 and the second member 82. The width of this opening 77 (the distance along the thickness direction of the transparent laminate film 30) may be, for example, 0.5 mm or more and 3 mm or less, similar to the width w2 of the second groove portion 76.

[0172] Furthermore, holding members 78 that hold the upper side portions 81a, 82a are attached to the upper side portions 81a, 82a. These holding members 78 serve to adjust the width of the opening 77. That is, by attaching the holding members 78 to the upper side portions 81a, 82a, the width of the opening 77 can be prevented from becoming too wide, and the width of the opening 77 can be maintained at a desired width (e.g., 0.5 mm or more and 3 mm or less). In the illustrated example, the holding members 78 sandwich the upper side portions 81a, 82a from the thickness direction of the transparent laminate film 30. Furthermore, a single holding member 78 is attached to the upper side portions 81a, 82a. Note that when a single holding member 78 is attached to the upper side portions 81a, 82a, the transparent laminate film 30 may be sandwiched between the upper side portions 81a, 82a, or the transparent laminate film 30 may be fixed to the upper side portions 81a, 82a. That is, when only one holding member 78 is attached to the upper side portions 81a, 82a, even if the transparent laminate film 30 expands and contracts as described below, the occurrence of wrinkles in the transparent laminate film 30 can be suppressed. For this reason, the transparent laminate film 30 may be fixed to the upper side portions 81a, 82a. Although not shown, multiple holding members 78 may be attached to the upper side portions 81a, 82a as long as the width of the opening 77 can be maintained at a desired width (for example, 0.5 mm or more and 3 mm or less).

[0173] The retaining member 78 is preferably attached near the longitudinal center of the upper side portions 81a, 82a. That is, near the longitudinal center of the upper side portions 81a, 82a, deformation of the upper side portions 81a, 82a may increase the width of the opening 77 (the distance between the upper side portions 81a, 82a). In contrast, by attaching the retaining member 78 near the longitudinal center of the upper side portions 81a, 82a, the width of the opening 77 can be maintained at a desired width (e.g., 0.5 mm to 3 mm) even in areas where the width of the opening 77 may increase. Such a retaining member 78 may be, for example, a clip or the like.

[0174] The width Wa (see FIG. 3) of such a film support portion 70 may be, for example, 310 mm or more and 1820 mm or less, and may be, for example, 887 mm. The depth Da (see FIG. 3) of the film support portion 70 may be, for example, 2 mm or more and 50 mm or less, and may be, for example, 18 mm. The height Ha (see FIG. 3) of the film support portion 70 may be, for example, 460 mm or more and 930 mm or less, and may be, for example, 604 mm.

[0175] Next, the stand 90 will be described. As shown in Fig. 3, the stand 90 includes a pair of bases 95, and a first support 96 and a second support 97 attached to each of the bases 95. The bases 95 are plate-shaped members, and have openings 95a formed in the center thereof into which the legs 73 are inserted. The openings 95a have a shape corresponding to the legs 73. That is, the openings 95a have a rectangular shape in plan view.

[0176] The first support portion 96 has a rectangular shape with some of the corners cut off in a side view (i.e., when viewed from the longitudinal direction of the second portion 72). In this case, the thickness of the first support portion 96 gradually decreases as it moves away from the first member 81.

[0177] Similarly, the second support portion 97 has a rectangular shape with some of the corners cut off in a side view (i.e., when viewed in the longitudinal direction of the second portion 72). In this case, the thickness of the second support portion 97 gradually decreases as it moves away from the second member 82.

[0178] The first support portion 96 and the second support portion 97 are arranged on the base 95 so as to be spaced apart from each other. The second portion 72 of the film support portion 70 is inserted between the first support portion 96 and the second support portion 97, thereby supporting the film support portion 70 on the stand portion 90. The method for connecting the first support portion 96 and the second support portion 97 to the base 95 is not particularly limited. For example, the first support portion 96 and the second support portion 97 may be integrated with the base 95 by welding or the like.

[0179] Here, the transparent laminate film 30 may absorb moisture from the surrounding area when the partition 10 is in use or stored. In this case, the absorption of moisture may cause the transparent laminate film 30 to expand or contract. If the transparent laminate film 30 expands or contracts in this way, wrinkles may occur in the transparent laminate film 30 in the partition 10. In contrast, in this modified example, the transparent laminate film 30 is supported by the film support section 70 in a state where it can move relative to the film support section 70. Therefore, when the transparent laminate film 30 expands or contracts, the transparent laminate film 30 moves relative to the film support section 70. In other words, the transparent laminate film 30 can expand or contract without causing wrinkles in the transparent laminate film 30. This improves the appearance of the partition 10.

[0180] As described above, according to this modification, the film support portion 70 is formed with the first groove portion 75 into which the first side 30a of the transparent laminate film 30 is inserted. Gaps S1a and S1b are formed between the transparent laminate film 30 and the first groove portion 75. The transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70. This makes it possible to prevent wrinkles from occurring in the transparent laminate film 30 even when the transparent laminate film 30 expands or contracts.

[0181] Furthermore, according to this modification, a second groove 76 into which the second side 30b of the transparent laminate film 30 is inserted is formed in the film support portion 70. A gap S2 is also formed between the transparent laminate film 30 and the second groove 76. This allows the film support portion 70 to support the transparent laminate film 30 in a more stable state. Furthermore, because the transparent laminate film 30 is inserted into the second groove 76 in a state in which it is movable relative to the film support portion 70, it is possible to prevent wrinkles from occurring in the transparent laminate film 30 even if the transparent laminate film 30 expands or contracts.

[0182] Furthermore, according to this modification, the second groove portion 76 includes a first side surface 76a facing the first surface 301 and a second side surface 76b facing the second surface 302. The height h1 of the first side surface 76a is different from the height of the second side surface 76b. This makes it easier to insert the second edge 30b of the transparent laminate film 30 into the second groove portion 76.

[0183] In the above-described modified example, the pair of first portions 71 and the pair of second portions 72 extending between the pair of first portions 71 are configured by the first member 81 and the second member 82, but this is not limiting. For example, although not shown, each of the first portions 71 may be configured by a single member. Similarly, each of the second portions 72 may be configured by a single member. Furthermore, the first portion 71 and the second portion 72 may be configured by separate members.

[0184] Furthermore, in the above-described modified example, the first groove portion 75 and the second groove portion 76 are respectively configured by the first step portion 83 of the first member 81 and the second step portion 84 of the second member 82. However, this is not limiting. For example, although not shown, one of the first step portion 83 and the second step portion 84 may not be formed. Even in this case, the first groove portion 75 and the second groove portion 76 can be formed by the first member 81 and the second member 82 by forming the other of the first step portion 83 and the second step portion 84. In this case, a step portion (e.g., the second step portion 84) does not need to be formed in one of the members (e.g., the second member 82). This simplifies the manufacturing process of the one of the members. Furthermore, although not shown, the first groove portion 75 and the second groove portion 76 may be formed by interposing another member between the first member 81 and the second member 82.

[0185] (Second Modification) 11 to 17, a groove 79 into which the second side (lower edge) 30b of the transparent laminate film 30 is inserted is formed in the film support part 70, and the groove 79 is curved in a plan view. Also in this modification, the transparent laminate film 30 is loosely held by the film support part 70, and the transparent laminate film 30 is supported by the film support part 70 in a state in which the transparent laminate film 30 is movable relative to the film support part 70.

[0186] 11 and 12, the film support portion 70 is made up of a rod-shaped member, and the film support portion 70 is curved in a plan view. In the illustrated example, the film support portion 70 is curved in an S-shape in a plan view. In this modified example, the film support portion 70 is made up of a single member.

[0187] 11 to 17, a groove 79 is formed in the film support portion 70, into which the lower second side (lower edge) 30b of the pair of second sides 30b of the transparent laminate film 30 is inserted. This groove 79 extends horizontally. Furthermore, the groove 79 is curved in a plan view. In the illustrated example, the groove 79 is curved in an S-shape in a plan view.

[0188] 13 to 17, a gap S3 is formed between the transparent laminate film 30 and the groove portion 79. Specifically, the gap S3 is formed between the transparent laminate film 30 and the groove portion 79 in the thickness direction of the transparent laminate film 30. In this manner, in this modification, the transparent laminate film 30 is inserted into the groove portion 79 with some play. This allows the transparent laminate film 30 to be supported by the film support portion 70 in a state where it can move relative to the film support portion 70. In this case, the first side 30a of the transparent laminate film 30 may be entirely exposed to the outside.

[0189] In the illustrated example, the gap S3 is formed in a partial region only on the first surface 301 side of the transparent laminate film 30. Also, the gap S3 is formed in a partial region only on the second surface 302 side. Furthermore, the gap S3 is formed in a partial region on both sides (the first surface 301 side and the second surface 302 side) in the thickness direction of the transparent laminate film 30.

[0190] In this modification, the transparent laminate film 30 is curved in a planar view, as described below. That is, in this modification, the transparent laminate film 30 is inserted into the groove 79 in a state in which it is elastically deformed so as to be curved in an S-shape in a planar view. In this case, the transparent laminate film 30 deforms in the groove 79 so as to extend linearly in a planar view. In this case, as shown in FIGS. 13 and 14 , the transparent laminate film 30 may be tilted in the thickness direction relative to the up-down direction due to the deformation of the transparent laminate film 30 in the groove 79. Therefore, the position where the gap S3 is formed in the thickness direction of the transparent laminate film 30 may vary along the up-down direction. Note that FIG. 13 is a perspective view showing the vicinity of the right first side 30a of the transparent laminate film 30 shown in FIG. 12 . FIG. 14 is a perspective view showing the vicinity of the left first side 30a of the first side 30a of the transparent laminate film 30 shown in FIG. 12 .

[0191] Specifically, as shown in FIG. 15 , near the bottom surface of the groove portion 79, the gap S3 is formed only on the first surface 301 side of the transparent laminate film 30 near the first peak point P1. Near the bottom surface of the groove portion 79, the gap S3 is formed only on the second surface 302 side of the transparent laminate film 30 near the second peak point P2. Near the bottom surface of the groove portion 79, the gap S3 is formed on both sides in the thickness direction of the transparent laminate film 30 in regions other than near the first peak point P1 or the second peak point P2. That is, as described above, in this modification, the transparent laminate film 30 deforms within the groove portion 79 so as to extend linearly in a planar view. As a result, the second surface 302 of the transparent laminate film 30 contacts the side surface 79a of the groove portion 79 near the first peak point P1, and the first surface 301 contacts the side surface 79b of the groove portion 79 near the second peak point P2. Here, the first peak point P1 is the point where the side surface 79a of the groove portion 79 on the second surface 302 side protrudes more toward the first surface 301 than the surrounding area. The second peak point P2 is the point where the side surface 79b of the groove portion 79 on the first surface 301 side protrudes more toward the second surface 302 than the surrounding area. In other words, the first peak point P1 is the point where the amount of protrusion toward the first surface 301 side is maximized, and the second peak point P2 is the point where the amount of protrusion toward the second surface 302 side is maximized.

[0192] 16 , near the upper ends of the grooves 79, in the vicinity of the first peak point P1, the gap S3 is formed only on the second surface 302 side of the transparent laminate film 30. Further, near the upper ends of the grooves 79, in the vicinity of the second peak point P2, the gap S3 is formed only on the first surface 301 side of the transparent laminate film 30. Further, near the upper ends of the grooves 79, in regions other than the vicinity of the first peak point P1 or the vicinity of the second peak point P2, the gap S3 is formed on both sides in the thickness direction of the transparent laminate film 30.

[0193] 17, the width w3 of the groove 79 along the thickness direction is preferably 0.5 mm or more and 3 mm or less. When the width w3 is 0.5 mm or more, the gap S3 between the transparent laminate film 30 and the groove 79 can be made larger. This can prevent the transparent laminate film 30 from being fixed to the film support part 70. Furthermore, when the width w3 is 3 mm or less, the transparent laminate film 30 can be effectively supported by the groove 79.

[0194] The depth D of the groove portion 79 is preferably 10 mm or more and 70 mm or less. When the depth D is 10 mm or more, the groove portion 79 can effectively support the transparent laminate film 30. Furthermore, when the depth D is 70 mm or less, the film support portion 70 can be prevented from becoming too large. This prevents the film support portion 70 from being too conspicuous. This makes it easier for users H1 and H2, who are facing each other across the partition 10, to see each other.

[0195] Furthermore, the depth D of the groove portion 79 is preferably 2% or more and 8% or less of the height h3 of the transparent laminate film 30. When the depth D is 2% or more of the height h3, the transparent laminate film 30 can be effectively supported by the groove portion 79. When the depth D is 8% or less of the height h3, the film support portion 70 can be prevented from becoming too large and being too conspicuous. This makes it easier for users H1 and H2, who are facing each other across the partition 10, to see each other.

[0196] The width Wb (see FIG. 12) of such a film support section 70 may be, for example, 280 mm or more and 1750 mm or less, and may be, for example, 825 mm. The depth Db (see FIG. 15) of the film support section 70 may be, for example, 30 mm or more and 300 mm or less, and may be, for example, 168.7 mm. The height Hb (see FIGS. 12 and 17) of the film support section 70 may be, for example, 451 mm or more and 930 mm or less, and may be, for example, 30 mm.

[0197] In this modification, the film support portion 70 supports the transparent laminate film 30 only by the groove portion 79. In this case, the first side (side edge) 30a and the second side (upper edge) 30b of the transparent laminate film 30, which is the uppermost of the two sides 30b, are exposed. That is, the film support portion 70 does not include a member covering the first side (side edge) 30a or the second side (upper edge) 30b of the transparent laminate film 30. Therefore, in this modification, the area visible to users H1 and H2 through the partition 10 can be expanded. Furthermore, the ratio of the area of ​​the film support portion 70 to the area of ​​the partition 10 can be reduced in a front view. This reduces obstruction to the field of view of users H1 and H2. Therefore, users H1 and H2, who face each other across the partition 10, can more easily see each other, facilitating smoother communication between users H1 and H2.

[0198] The transparent laminate film 30 is curved in a plan view. In the illustrated example, the transparent laminate film 30 is curved in an S-shape in a plan view. This prevents the transparent laminate film 30 from bending in the vertical direction even when the transparent laminate film 30 is supported only by the groove portions 79. This allows the transparent laminate film 30 to stand on its own.

[0199] As described above, the transparent laminate film 30 can suppress reflection of light incident from the first surface 301 side of the transparent laminate film 30 and reflection of light incident from the second surface 302 side of the transparent laminate film 30. Therefore, even when the transparent laminate film 30 is curved in a planar view, it is possible to suppress reflection of users H1, H2, etc. in the transparent laminate film 30.

[0200] In this modification, the first side (side edge) 30a and the second side 30b of the transparent laminate film 30, of which the upper side (upper edge) 30b is located, are exposed to the outside. In this case, it is preferable that the corner between the second side 30b and the first side 30a is rounded. This can prevent users H1 and H2 from being injured even if they come into contact with the partition 10.

[0201] As described above, according to this modification, the film support portion 70 is formed with a groove portion 79 into which the lower second edge 30b of the transparent laminate film 30 is inserted. The groove portion 79 is also curved in a plan view. A gap S3 is formed between the transparent laminate film 30 and the groove portion 79. The transparent laminate film 30 is supported by the film support portion 70 in a state in which it can move relative to the film support portion 70. Even in this case, even if the transparent laminate film 30 expands or contracts, the occurrence of wrinkles in the transparent laminate film 30 can be suppressed. This improves the appearance of the partition 10.

[0202] Furthermore, according to this modification, the corner between the upper second side 30b of the transparent laminate film 30 and the first side 30a is rounded, which makes it possible to prevent the users H1 and H2 from being injured even if they come into contact with the partition 10.

[0203] In the above-described modified example, the film support section 70 is configured from a single member, but the present invention is not limited to this. For example, although not shown, the film support section 70 may be configured from multiple members.

[0204] In the above-described modified example, the film support portion 70 is curved in a plan view, but this is not limiting. For example, although not shown, the film support portion 70 may extend linearly in a plan view as long as the groove portion 79 is curved in a plan view. [Example]

[0205] Next, a specific example of the above embodiment will be described.

[0206] Example 1 First, a transparent laminate film 30 shown in FIG. 2C was prepared. First, a first-side antireflection layer 40 was prepared. To prepare the first-side antireflection layer 40, a 60 μm-thick triacetyl cellulose film (refractive index: 1.49) was first prepared as the first-side transparent substrate layer 42. Next, a hard coat layer-forming coating solution having the following formulation was applied to the triacetyl cellulose film, followed by drying and ultraviolet irradiation, to form a first-side hard coat layer 44 with a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. Next, a high refractive index layer-forming coating solution having the following formulation was applied to the first-side hard coat layer 44, followed by drying and ultraviolet irradiation, to form a first-side high refractive index layer 46 with a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer having the following formulation was applied onto this first-side high refractive index layer 46, followed by drying and ultraviolet irradiation to form a first-side low refractive index layer 45 having a thickness of 100 nm and a refractive index of 1.30, thereby obtaining a first-side antireflection layer 40.

[0207] <Preparation of Coating Solution for Forming Hard Coat Layer> 1.6 parts by weight of a photopolymerization initiator (BASF, Irgacure 127, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)benzyl]phenyl}-2-methylpropan-1-one) and 58.3 parts by weight of a dilution solvent (methyl isobutyl ketone / cyclohexanone = 8 / 2) were added and stirred until no residue remained. 20 parts by weight of a photocurable resin (Arakawa Chemical, Beamset 577) and 20 parts by weight of a high refractive index resin (DIC Corporation, Polylite RX-4800) were added and stirred until no residue remained. Finally, 0.1 parts by weight of a leveling agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) was added and stirred to prepare a coating solution for forming a hard coat layer.

[0208] <Preparation of Coating Solution for Forming High Refractive Index Layer> 0.1 parts by weight of a photopolymerization initiator (BASF, Irgacure 127) and 92.6 parts by weight of a dilution solvent (methyl isobutyl ketone / cyclohexanone / methyl ethyl ketone = 4 / 2 / 4) were added and stirred until no residue remained. 1.25 parts by weight of a photocurable resin (Arakawa Chemical, Beamset 577) were added and stirred until no residue remained. 6 parts by weight of zirconium oxide (Sumitomo Osaka Cement, MZ-230X, solids content 32.5% by weight, average primary particle size 15-50 nm) and 0.05 parts by weight of a leveling agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a high refractive index layer.

[0209] <Preparation of Coating Solution for Forming Low Refractive Index Layer> 0.2 parts by weight of photopolymerization initiator (BASF, Irgacure 127) and 91.1 parts by weight of dilution solvent (MIBK / AN = 7 / 3) were added and stirred until no residue remained. 1.0 parts by weight of photocurable resin (Nippon Kayaku, KAYARAD-PET-30), 7.6 parts by weight of hollow silica particles (solid content 20% by weight, average primary particle diameter 60 nm), and 0.1 parts by weight of leveling agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seikabeam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a low refractive index layer.

[0210] Next, a second-side antireflection layer 50 was prepared. To prepare the second-side antireflection layer 50, a 60 μm-thick triacetyl cellulose film (refractive index: 1.49) was first prepared as the second-side transparent substrate layer 52. Next, the hard coat layer-forming coating solution having the above-described formulation was applied onto the triacetyl cellulose film, followed by drying and UV irradiation, to form a second-side hard coat layer 54 with a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. Next, the high refractive index layer-forming coating solution having the above-described formulation was applied onto this second-side hard coat layer 54, followed by drying and UV irradiation, to form a second-side high refractive index layer 56 with a thickness of 150 nm and a refractive index of 1.63. Next, the low refractive index layer-forming coating solution having the above-described formulation was applied onto this second-side high refractive index layer 56, followed by drying and UV irradiation, to form a second-side low refractive index layer 55 with a thickness of 100 nm and a refractive index of 1.30, thereby obtaining the second-side antireflection layer 50.

[0211] Next, the first-side antireflection layer 40 and the second-side antireflection layer 50 were bonded together via a transparent adhesive layer (Panaclean series PD-S1, manufactured by Panac Corporation, thickness 25 μm), a 60 μm-thick triacetyl cellulose film, and another transparent adhesive layer (Panaclean series PD-S1, thickness 25 μm, manufactured by Panac Corporation) to produce a transparent laminate film 30. The layer structure of the obtained transparent laminate film 30 is as follows. Low flex / High flex / Hard coat / TAC / Adhesive / TAC / Adhesive / TAC / Hard coat / High flex / Low flex In the above, "low refractive index" means a first-side low refractive index layer or a second-side low refractive index layer (the same applies hereinafter). Also, "high refractive index" means a first-side high refractive index layer or a second-side high refractive index layer (the same applies hereinafter). Also, "hard coat" means a first-side hard coat layer or a second-side hard coat layer (the same applies hereinafter). Also, "TAC" means a triacetyl cellulose film (the same applies hereinafter). Furthermore, "adhesive" means a transparent adhesive layer. The thickness of the transparent laminate film 30 according to Example 1 was 245.1 μm.

[0212] (1) Reflectance measurement test Next, a reflectance measurement test was carried out on the transparent laminate film 30.

[0213] First, a sample measuring 20 mm x 20 mm was cut out from the obtained transparent laminate film 30. Next, a black resin plate was attached to the back surface of the sample. Next, light was irradiated onto the surface of the sample at an incident angle of 5°. At this time, the wavelength of the light was set to 550 nm, and the light was irradiated onto the surface of the sample. Then, the light reflection spectrum was measured using a spectrophotometer (V-7100, manufactured by JASCO Corporation), and the light reflectance was calculated.

[0214] (2) Transmittance measurement test Furthermore, a transmittance measurement test was carried out on the transparent laminate film 30.

[0215] First, a sample measuring 20 mm x 20 mm was cut out from the obtained transparent laminate film 30. Next, light was irradiated onto the surface of the sample at an incident angle of 90°. At this time, the light was irradiated onto the surface of the sample with a wavelength of 550 nm. Then, the light transmission spectrum was measured using a spectrophotometer (V-7100 manufactured by JASCO Corporation), and the light transmittance at each wavelength was calculated.

[0216] (3) Haze measurement test Furthermore, a haze measurement test was carried out on the transparent laminate film 30.

[0217] First, a sample measuring 20 mm x 20 mm was cut out from the obtained transparent laminate film 30. Next, the haze was measured using a haze meter (HM-150, manufactured by Murakami Color Research Laboratory Co., Ltd.) in the following manner. First, visible light was irradiated onto the transparent laminate film 30 from the first surface 301 side along the thickness direction of the transparent laminate film 30. Next, the ratio of diffuse transmitted light to total transmitted light was measured. Then, the haze (cloudiness) was expressed as diffuse transmitted light / total transmitted light×100 (%).

[0218] (4) Piercing resistance test, simple piercing test Furthermore, a puncture resistance test was carried out on the transparent laminate film 30.

[0219] The puncture strength of the transparent laminate film 30 was measured in accordance with JIS Z1707 7.4. The measuring device used was a combination of a Force Tester MCT-2150 manufactured by A&D Corporation and a puncture test jig JM-CL-100N manufactured by A&D Corporation. Specifically, as shown in FIG. 18 , a needle 100 was pierced from the first surface 301 side of a test piece of the fixed transparent laminate film 30, and the maximum stress value until the needle 100 penetrated the transparent laminate film 30 was measured. The needle 100 used had a diameter of 1.0 mm and a hemispherical tip with a radius of 0.5 mm. The needle 100 was pierced into the transparent laminate film 30 at a speed of 50 mm / min (50 mm per minute). The maximum stress values ​​were measured for five test pieces, and the average value was used as the puncture strength of the transparent laminate film 30. The measurement was performed in an environment with a temperature of 23°C and a relative humidity of 50%.

[0220] Furthermore, a simple puncture test was conducted. First, the transparent laminate film 30 was fixed to the base of the puncture test jig JM-CL-100N described above. Next, a mechanical pencil (Mechpencil 0.7 manufactured by Daiso Industries Co., Ltd.) was prepared. Then, a tester manually punctured the transparent laminate film 30 10 times with the tip of the mechanical pencil. At this time, the simple puncture test was conducted without the lead protruding from the tip of the mechanical pencil. In this way, the puncture resistance of the transparent laminate film 30 was evaluated.

[0221] (5) Acoustic characteristics evaluation test An acoustic characteristic evaluation test was also conducted on the partition 10. FIG. 19 is a diagram for explaining the acoustic characteristic evaluation test on the partition 10.

[0222] In the acoustic characteristics evaluation test, loudness (sone) was measured based on ISO532-1. Specifically, first, as shown in FIG. 19, a partition 10 was placed on a desk T in a room. A speaker 101 (OfficeCoreM2, manufactured by eMeet) was placed on the first surface 301 side of the transparent laminate film 30 of the partition 10. The distance d1 between the first surface 301 and the speaker 101 was set to 50 cm. A loudness measurement system 102 was placed on the second surface 302 side of the transparent laminate film 30. The loudness measurement system 102 was a device combining an analyzer (MultiJob FFT Analyzer OR34, manufactured by OROS Co., Ltd.) and a microphone (Microphone 378B02, manufactured by PCB Co., Ltd.). The distance d2 between the second surface 302 and the loudness measurement system 102 was set to 50 cm. White noise was then played from the speaker 101, and the sound pressure was measured by the loudness measurement system 102. Furthermore, the measured sound pressure was multiplied by a coefficient to calculate loudness (sone). Loudness (sone) was calculated by measuring sound pressure at multiple frequencies between 12.5 Hz and 12,800 Hz, and then using the sound pressure measurement results to calculate the loudness in the analyzer system. Here, 1 sone is the loudness of a sound perceived by a human hearing a 1 kHz, 40 dB pure tone.

[0223] (6) Sensory evaluation test In addition, a sensory evaluation test of Partition 10 was conducted.

[0224] The purpose of the sensory evaluation test will now be explained. The present inventors have conducted extensive research into a partition 10 that enables smooth communication between users H1 and H2. As a result, the present inventors have discovered that in order to achieve smooth communication between users H1 and H2, it is important that speech can be easily heard through the partition 10. The present inventors have also discovered that in order to achieve smooth communication between users H1 and H2, it is important that users H1 and H2 can clearly see each other's facial expressions, mouth movements, etc. through the partition 10. Based on this knowledge, a sensory evaluation test was conducted to evaluate the usability of the partition 10 when actually used.

[0225] In the sensory evaluation test, 18 test subjects were divided into nine pairs of two people. Next, each of the nine pairs of test subjects was interviewed about whether it was easy or difficult for them to see each other when they faced each other across the partition 10, as shown in Figure 1A by users H1 and H2.

[0226] At this time, each subject was asked to provide a score representing the degree of visibility. Specifically, the scores representing the degree of visibility were set as follows: First, a state in which the partition 10 was not used (Comparative Example 4 described later) was assigned a score of 3. Furthermore, a state in which a commercially available partition was used (Comparative Example 2 described later) was assigned a score of 0. The commercially available partition had a 2 mm thick acrylic plate as a partition panel.

[0227] Then, each subject was asked to rate the degree of visibility when the partition 10 of Example 1 was used.

[0228] Additionally, each of the nine pairs of subjects was asked whether it was easy or difficult for them to hear each other's voices when they conversed through partition 10. During this process, each subject conversed through partition 10 both in a state where their field of vision was obstructed by wearing an eye mask, and in a state where their field of vision was not obstructed.

[0229] At this time, each subject was asked to provide a score representing the degree of ease of hearing. Specifically, the scores representing the degree of ease of hearing were set as follows: First, the subjects conversed with each other without using the partition 10 (Comparative Example 4 described below), and the score in this case was set to 3 points. Also, the subjects conversed with each other through a commercially available partition (Comparative Example 2 described below), and the score in this case was set to 0 points. The commercially available partition had a 2 mm thick acrylic plate as a partition panel.

[0230] Each subject was then asked how many points they felt it was easy to hear when using the partition 10 of Example 1. The degree of ease of hearing was calculated as a score based on a comprehensive evaluation of both the state in which each subject's field of vision was obstructed and the state in which their field of vision was not obstructed. The subjects were also asked if they had noticed anything else when using the partition 10.

[0231] Example 2 A reflectance measurement test, a transmittance measurement test, a haze measurement test, a puncture resistance test, a simple puncture test, an acoustic property evaluation test, and a sensory evaluation test were carried out in the same manner as in Example 1, except that the transparent laminate film 30 shown in FIG. 2E was prepared, a transparent polyethylene terephthalate (PET) film having a thickness of 60 μm was used as the layer corresponding to the first-side transparent substrate layer 42 and the second-side transparent substrate layer 52, and the thickness of the transparent laminate film 30 was 160 μm.

[0232] (Comparative Example 1) A reflectance measurement test, a transmittance measurement test, a haze measurement test, a puncture resistance test, a simple puncture test, an acoustic property evaluation test, and a sensory evaluation test were carried out in the same manner as in Example 1, except that a commercially available polyethylene terephthalate (PET) film having a thickness of 25 μm (Lumirror T60, manufactured by Toray Industries, Inc.) was used instead of the transparent laminate film 30.

[0233] (Comparative Example 2) The reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test and simple puncture test were carried out in the same manner as in Example 1, except that a 2 mm thick acrylic plate used in a commercially available partition (Artec Co., Ltd., Extra Large Splash Prevention Panel Partition Set 51450) was used instead of the transparent laminated film 30.

[0234] Moreover, an acoustic characteristic evaluation test and a sensory evaluation test were carried out in the same manner as in Example 1, except that the partition 10 using the transparent laminate film 30 was replaced with the commercially available partition.

[0235] (Comparative Example 3) The reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, and simple puncture test were performed in the same manner as in Example 1, except that a commercially available 16 μm thick polyethylene terephthalate (PET) film (Lumirror 16F68M, manufactured by Toray Industries, Inc.) was used instead of the transparent laminate film 30.

[0236] Comparative Example 4 Except for the fact that no partition was used, the acoustic characteristic evaluation test and the sensory evaluation test were carried out in the same manner as in Example 1. Specifically, in the acoustic characteristic evaluation test, loudness (sone) was measured with the speaker 101 and the loudness measurement system 102 spaced 100 cm apart.

[0237] (Test results) Of the above tests, the results of the reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, simple puncture test, and acoustic property evaluation test are shown in Table 1.

[0238] [Table 1]

[0239] In the column for the simple puncture test in Table 1 above, "◯" means that the simple puncture test showed high resistance to puncture. In other words, it means that the tip of the mechanical pencil did not penetrate the transparent laminate film 30. "X" means that the simple puncture test showed low resistance to puncture. In other words, it means that the tip of the mechanical pencil penetrated the transparent laminate film 30, creating a hole in the transparent laminate film 30.

[0240] As a result, as shown in Table 1, in the reflectance measurement test, the reflectance of light with a wavelength of 550 nm was high, at least 6.0%, in Comparative Examples 1, 2, and 3. In contrast, the reflectance of light with a wavelength of 550 nm was 0.1% and 0.8%, respectively, in Examples 1 and 2. Thus, the transparent laminate films 30 according to Examples 1 and 2 were able to reduce the reflectance of light with a wavelength of 550 nm.

[0241] Furthermore, as shown in Table 1, in the transmittance measurement test, the transmittance of light with a wavelength of 550 nm was 87.4%, 91.4%, and 85.0%, respectively, in Comparative Examples 1, 2, and 3. In contrast, the transmittance of light with a wavelength of 550 nm was 98.7% and 98.1%, respectively, in Examples 1 and 2. Thus, the transparent laminate films 30 according to Examples 1 and 2 were able to improve the transmittance of light with a wavelength of 550 nm.

[0242] Furthermore, as shown in Table 1, in the haze measurement test, the haze was 1.4% and 3.5% in Comparative Example 1 and Comparative Example 3, respectively. In contrast, the haze was 0.7% and 0.6% in Example 1 and Example 2, respectively. Thus, the transparent laminate films 30 according to Examples 1 and 2 were able to reduce the haze compared to the films according to Comparative Examples 1 and 3.

[0243] Furthermore, as shown in Table 1, in the puncture resistance test, the maximum stress value in Comparative Example 1 and Comparative Example 3 was 8 N or less, and the films were easily punctured and damaged. In contrast, in Examples 1 and 2, the maximum stress value was 10 N or more, and the films were less likely to be punctured. Furthermore, in the simple puncture test, Comparative Examples 1 and 3 had low resistance to puncture. In contrast, Examples 1 and 2 had high resistance to puncture. Therefore, the films of Examples 1 and 2 had greater puncture resistance than the films of Comparative Example 1 or Comparative Example 3.

[0244] Furthermore, as shown in Table 1, in the acoustic characteristics evaluation test, the measured loudness (sone) in Comparative Example 2 was 8.7 sone. In contrast, the measured loudness in Examples 1 and 2 was 9.0 sone. As such, it was shown that the partitions 10 according to Examples 1 and 2 transmit sound more easily from the speaker 101 to the loudness measurement system 102 than the partition according to Comparative Example 2. This result shows that the partitions 10 according to Examples 1 and 2 transmit sound better than the partition according to Comparative Example 2.

[0245] The results of the sensory evaluation test are shown in Table 2.

[0246] [Table 2]

[0247] The values ​​shown in the "visibility" column and the "audibility" column in Table 2 above are the average scores obtained by interviewing each subject.

[0248] As a result, as shown in Table 2, in a sensory evaluation test for "ease of visibility," when the partition according to Comparative Example 2 was given a score of 0, the average scores for ease of visibility in Examples 1 and 2 were greater than 0. Also, as shown in Table 2, the average score for ease of visibility in Comparative Example 1 was 0.3 points. In contrast, the average scores for ease of visibility in Examples 1 and 2 were 2.6 points and 1.9 points, respectively. Thus, it was found that users could more easily see each other with the partitions 10 according to Examples 1 and 2 than with the partitions according to Comparative Examples 1 and 2.

[0249] Furthermore, through interviews with the subjects, it was learned that with the partition according to Comparative Example 1, wrinkles (wavy shapes) occurred on the surface of the PET film, making it difficult to see the figures of the paired subjects. Furthermore, it was learned that with the partition 10 according to Example 1, the wrinkles (wavy shapes) on the surface of the transparent laminate film 30 were smaller than those in the partition according to Comparative Example 1, making it easier to see the figures of the paired subjects. From this, it was found that the transparent laminate film 30 according to Example 1 can reduce the wrinkles (wavy shapes) that occur on the surface compared to the PET film according to Comparative Example 1, and when used in the partition 10, it is easier for users to see each other.

[0250] Furthermore, as shown in Table 2, in a sensory evaluation test regarding "ease of hearing," when the partition according to Comparative Example 2 was given a score of 0, the average score for ease of hearing in Examples 1 and 2 was greater than 0. Also, as shown in Table 2, the average score for ease of hearing in Comparative Example 1 was 0.7 points. In contrast, the average scores for ease of hearing in Examples 1 and 2 were 1.6 points and 2.0 points, respectively. Thus, it was found that with the partitions 10 according to Examples 1 and 2, users could hear each other's voices more easily than with the partitions according to Comparative Examples 1 and 2.

[0251] As described above, in the acoustic characteristic evaluation test, the measured loudness (sone) was 9.0 sone in Examples 1 and 2 (see Table 1). On the other hand, the measured loudness in Comparative Example 1 was 9.4 sone. That is, the partition according to Comparative Example 1 transmitted sound more easily than the partition 10 according to Examples 1 and 2. On the other hand, as shown in Table 2, the average score for "ease of hearing" in the sensory evaluation test was higher for the partition 10 according to Examples 1 and 2 than for the partition according to Comparative Example 1. That is, it was found that when the partition 10 according to Examples 1 and 2 was used, users felt that it was easier to hear each other's voices than when the partition according to Comparative Example 1 was used. Although a complete clarification of the reason for this must await future research, it is thought that, for example, in the sensory evaluation test, conditions such as whether users can easily see each other's mouth movements affect the ease with which they can hear each other's voices. Specifically, in the partitions 10 of Examples 1 and 2, it is easier to see each other's mouth movements than in the partition of Comparative Example 1, which is thought to give users the impression that it is easier to hear each other's voices.

[0252] From the above, it was found that, when users converse face-to-face with a partition in between, conditions such as whether they can easily see each other's mouth movements can affect whether they feel it is easy to hear each other's voices. Furthermore, in a sensory evaluation test in which subjects actually converse through a partition, it was found that users rated it as easier to hear each other's voices when the partitions 10 of Examples 1 and 2 were used than when the partition of Comparative Example 1 was used.

[0253] The components disclosed in the above embodiments and modifications may be combined as needed, or some components may be omitted from all the components disclosed in the above embodiments and modifications. [Explanation of symbols]

[0254] 10 Partitions 30 Transparent laminated film 30a Side 1 30b Side 2 301 Page 1 302 2nd page 40 First surface anti-reflection layer 50 Second surface anti-reflection layer 61 First surface protective film 62 Second surface protective film 70 Film support part 71 Part 1 72 Part 2 75 First groove 76 Second groove 76a 1st side 76b 2nd side 79 Groove 90 Stand G horizontal plane

Claims

1. a transparent laminate film having a first surface and a second surface located opposite the first surface; A film support portion that supports the transparent laminate film, the transparent laminate film includes a first-side antireflection layer that constitutes the first surface and a second-side antireflection layer that constitutes the second surface, the transparent laminate film has an upper edge, a lower edge, and a pair of side edges extending between the upper edge and the lower edge; a pair of first grooves into which the side edges of the transparent laminate film are inserted, respectively, are formed in the film support portion; a gap is formed between the transparent laminate film and the first groove portion in the thickness direction and the width direction of the transparent laminate film, The transparent laminate film is supported on the film support portion in a state where it can move relative to the film support portion.

2. A partition as described in claim 1, wherein the width of the first groove portion along the thickness direction of the transparent laminated film is 0.5 mm or more and 3 mm or less.

3. A second groove portion into which the lower edge of the transparent laminate film is inserted is formed in the film support portion, The partition according to claim 1 or 2, wherein a gap is formed between the transparent laminate film and the second groove portion.

4. A partition as described in Claim 3, wherein the width of the second groove portion along the thickness direction of the transparent laminated film is 0.5 mm or more and 3 mm or less.

5. A partition as described in claim 3 or 4, wherein the second groove portion includes a first side surface facing the first surface and a second side surface facing the second surface, and the height of the first side surface is different from the height of the second side surface.

6. A transparent laminate film having a first surface and a second surface located opposite the first surface; A film support portion that supports the transparent laminate film, the transparent laminate film includes a first-side antireflection layer that constitutes the first surface and a second-side antireflection layer that constitutes the second surface, the transparent laminate film has an upper edge, a lower edge, and side edges extending between the upper edge and the lower edge; a groove portion into which the lower edge of the transparent laminate film is inserted is formed in the film support portion; The groove portion is curved in an S-shape in a plan view, A gap is formed between the transparent laminate film and the groove portion, The transparent laminate film is supported on the film support portion in a state where it can move relative to the film support portion.

7. A partition as described in Claim 6, wherein the width of the groove portion along the thickness direction of the transparent laminated film is 0.5 mm or more and 3 mm or less.

8. The partition according to claim 1 , wherein the transparent laminate film further comprises a core layer located between the first-side anti-reflection layer and the second-side anti-reflection layer.

9. The partition of claim 8, wherein the transparent laminate film further comprises a first transparent adhesive layer that adheres the first-side anti-reflection layer and the core layer to each other, and a second transparent adhesive layer that adheres the core layer and the second-side anti-reflection layer to each other.

10. The partition according to claim 1 , wherein the transparent laminate film further comprises a transparent adhesive layer that bonds the first-side anti-reflection layer and the second-side anti-reflection layer together.

11. 11. The partition according to claim 1, wherein the transparent laminate film has a thickness of 300 μm or less.

12. 12. The partition according to claim 1, wherein the light reflectance of the transparent laminate film is 3.0% or less.

13. 13. The partition according to claim 1, wherein the transparent laminate film has a total light transmittance of 90% or more.

14. The partition according to any one of claims 1 to 13, wherein the film support portion supports the transparent laminate film in a flattened state.

15. The partition according to any one of claims 1 to 14, further comprising a stand portion that supports the film support portion so that the first surface of the transparent laminate film is perpendicular to a horizontal plane.

16. 16. A partition according to any one of the preceding claims, wherein corners between the top edge and the side edges are rounded.

17. A transparent laminate film for use in the partition according to any one of claims 1 to 16, having a first surface and a second surface located opposite to the first surface, A transparent laminate film for a partition, comprising a first-side anti-reflection layer constituting the first side and a second-side anti-reflection layer constituting the second side.

18. A building comprising a partition according to any one of claims 1 to 16.

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