Partitions and transparent laminated films for 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 laminated films for partitions.

Background Art

[0002] Conventionally, partitions for preventing the movement of droplets such as saliva due to sneezing or coughing between facing persons have been known (see, for example, Patent Document 1). Patent Document 1 discloses a partition including a transparent acrylic plate partition panel and a stand for supporting the partition panel in an upright state. Such a partition is placed between facing persons to prevent the movement of droplets such as saliva between the facing persons.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in such a partition, light such as indoor lighting or sunlight incident from the outside is reflected on the partition panel, and there is a possibility that users or the like may be reflected in the partition. In this way, when users or the like are reflected in the partition, it may become difficult for the persons facing each other across the partition to see each other's figures. In this way, when it becomes difficult for the persons facing each other to see each other's figures, for example, when communicating while seeing each other's expressions and movements of the mouth corners in face-to-face business such as hotel front desk services or consultation counters at financial institutions, the quality of communication may deteriorate. Therefore, there is a need to improve the visibility due to light reflection for partitions.

[0005] Furthermore, when communicating across a partition, users may have difficulty hearing others. This difficulty in hearing others can also lead to a deterioration in the quality of communication.

[0006] This disclosure has been made with these points in mind, and aims to provide a partition and a transparent laminated film for partitions that effectively suppresses light reflection and makes it easier to hear what the other party is saying. [Means for solving the problem]

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

[0008] In a partition according to one embodiment, the transparent laminated film may further include a core layer located between the first anti-reflective layer and the second anti-reflective layer.

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

[0010] In a partition according to one embodiment, the transparent laminated film may further include a transparent adhesive layer that adheres the first anti-reflective layer and the second anti-reflective layer to each other.

[0011] In one embodiment of the partition, the thickness of the transparent laminated film may be 300 μm or less.

[0012] In one embodiment of the partition, the light reflectance of the transparent laminated film may be 3.0% or less.

[0013] In one embodiment of the partition, the total light transmittance of the transparent laminated film may be 90% or more.

[0014] In one embodiment of the partition, the film support portion may support the transparent laminated film in a flattened state.

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

[0016] In one embodiment of a partition, the transparent laminated film may have an upper edge, a lower edge, and a pair of side edges. The film support portion may have a rectangular shape having an upper edge corresponding to the upper edge, a lower edge corresponding to the lower edge, and side edges corresponding to each side edge. The lower edge may have a retaining portion that holds the lower edge, and a pair of extensions that extend from the retaining portion to both sides perpendicular to the transparent laminated film. A gap of width L may be formed between the lower edge and the mounting surface on which the film support is placed. The width L may be 20 mm or more and 130 mm or less. The width W between the side end of each extension and the transparent laminated film, in the direction perpendicular to the transparent laminated film, may be 20 mm or more.

[0017] In one embodiment of a partition, the transparent laminated film may have an upper edge, a lower edge, and a pair of side edges. The film support portion may have a rectangular shape having an upper edge corresponding to the upper edge, a lower edge corresponding to the lower edge, and side edges corresponding to each side edge. The lower side may have a holding part that holds the lower edge, and a pair of extension parts that extend from both sides of the holding part so as to be orthogonal to the transparent laminated film. A gap with a width L may be formed between the lower side and the mounting surface on which the film support part is mounted. The width L may be 20 mm or more and 130 mm or less. The width W in the direction orthogonal to the transparent laminated film between the side end of each extension part and the transparent laminated film may be 20 mm or more. The film support part may be provided on the mounting surface via the stand part. The film support part may be movable in the vertical direction with respect to the stand part.

[0018] In the partition according to one embodiment, the width W may be 20 mm or more and 75 mm or less.

[0019] In the partition according to one embodiment, the width L may be 40 mm or more and 90 mm or less.

[0020] The transparent laminated film for a partition according to one embodiment is a transparent laminated film used for the partition described above, and has a first surface and a second surface located on the opposite side of the first surface, and includes a first surface antireflection layer that constitutes the first surface and a second surface antireflection layer that constitutes the second surface.

[0021] A building according to one embodiment includes the partition described above.

Advantages of the Invention

[0022] According to the present disclosure, it is possible to provide a partition and a transparent laminated film for a partition that can effectively suppress light reflection and make it easy to hear the speech of the person being talked to.

Brief Description of the Drawings

[0023] [Figure 1A] Figure 1A is a perspective view showing a partition according to one embodiment. [Figure 1B] Figure 1B is a perspective view showing a partition according to one embodiment. [Figure 1C] Figure 1C is a vertical cross-sectional view of the partition shown in Figure 1A (a cross-sectional view of the IC-IC line in Figure 1A). [Figure 2A] Figure 2A is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 2B] Figure 2B is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 2C] Figure 2C is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 2D] Figure 2D is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 2E] Figure 2E is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 2F] Figure 2F is a cross-sectional view showing an example of the layer configuration of a transparent laminated film with a protective film according to one embodiment. [Figure 3A] Figure 3A is a perspective view showing a first modified example of the film support portion of a partition according to one embodiment. [Figure 3B] Figure 3B is a front view showing a first modified example of the film support portion of a partition according to one embodiment. [Figure 4] Figure 4 is a cross-sectional view (cross-sectional view along line IV-IV in Figure 3B) showing a first modified example of the film support portion of the partition according to one embodiment. [Figure 5] Figure 5 is a cross-sectional view (cross-sectional view along line VV in Figure 3B) showing a first modified example of the film support portion of the partition according to one embodiment. [Figure 6]Figure 6 is a cross-sectional view (cross-sectional view along line VI-VI in Figure 3B) showing a first modified example of the film support portion of the partition according to one embodiment. [Figure 7] Figure 7 is a side view showing a first modified example of the stand portion of a partition according to one embodiment. [Figure 8] Figure 8 is a cross-sectional view (cross-sectional view along line VIII-VIII in Figure 3B) showing a first modified example of the stand portion of the partition according to one embodiment. [Figure 9A] Figure 9A is a cross-sectional view (corresponding to Figure 4) showing a second modified example of the film support portion of the partition according to one embodiment. [Figure 9B] Figure 9B is a cross-sectional view (corresponding to Figure 4) showing an example of a third modified example of the film support portion of a partition according to one embodiment. [Figure 9C] Figure 9C is a cross-sectional view (corresponding to Figure 4) showing an example of a third modified example of the film support portion of a partition according to one embodiment. [Figure 9D] Figure 9D is a cross-sectional view (corresponding to Figure 4) showing an example of a fourth modified example of the film support portion of the partition according to one embodiment. [Figure 10] Figure 10 illustrates the puncture resistance test using examples and comparative examples. [Figure 11] Figure 11 illustrates the acoustic properties evaluation tests using examples and comparative examples. [Figure 12] Figure 12 illustrates the droplet test using examples, comparative examples, and reference examples. [Modes for carrying out the invention]

[0024] This embodiment will be described below with reference to the drawings. Figures 1A to 2F show this embodiment. The following figures are schematic diagrams. Therefore, the size and shape of each part are exaggerated as appropriate to facilitate understanding. Furthermore, it can be modified as appropriate without departing from the technical concept. In the following figures, the same parts are denoted by the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values ​​such as dimensions and material names of each component described in this specification are examples of embodiments and can be selected and used as appropriate without being limited thereto. In this specification, terms that specify shapes and geometric conditions, such as parallel, orthogonal, and perpendicular, will be interpreted to include not only their strict meaning but also substantially the same state.

[0025] partition First, the partition 10 will be described. Figures 1A and 1B show an example of the partition 10 according to this embodiment. Figure 1C is a vertical cross-sectional view showing the partition 10 shown in Figure 1A, cut at a plane perpendicular to the first surface 301 of the transparent laminated film 30 (described later) and the horizontal plane G (described later). In this specification, "upper" and "lower" refer to the upper and lower parts of the partition 10 when it is in an upright position (Figures 1A to 1C), respectively.

[0026] Partition 10 is placed in a room R, such as a conference room or meeting space. This partition 10 can be used to divide the space of room R. Partition 10 may be placed on a desk T located in room R. In this case, the top surface of desk T becomes the mounting surface on which partition 10 is placed. The top surface (mounting surface) of desk T may be parallel to the horizontal plane G. Partition 10 can also be placed on desk T, for example, between user H1 and user H2 facing user H1. Partition 10 serves to prevent droplets such as saliva from moving between user H1 and user H2. In Figures 1A and 1B, users H1 and H2 of partition 10 may correspond to speakers making statements in room R. In the examples shown in Figures 1A and 1B, partition 10 is placed on desk T located inside room R, so as to block the view in front of users H1 and H2 facing each other.

[0027] As shown in Figures 1A to 1C, the partition 10 comprises a transparent laminated film 30 and a film support portion 70 that supports the transparent laminated film 30. The partition 10 may also further include a stand portion 90.

[0028] The shape of the transparent laminated film 30 is not particularly limited and is determined as appropriate according to the shape of the space partitioned by the partition 10. In the example shown in Figures 1A and 1B, the transparent laminated film 30 has a rectangular shape. The transparent laminated 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 laminated film 30 also has a pair of first sides 30a (side edges 30a) and a pair of second sides 30b (upper edge 30b1 and lower edge 30b2) perpendicular to the first sides 30a. The first sides 30a are perpendicular to the horizontal plane G (see Figure 1C). The second sides 30b are parallel to the horizontal plane G. The pair of first sides 30a (side edges 30a) extend between the pair of second sides 30b (upper edge 30b1 and lower edge 30b2). The other components of the transparent laminated film 30 will be described later.

[0029] Next, the film support section 70 will be described.

[0030] (Film support section) As described above, the film support portion 70 supports the transparent laminated film 30. In Figures 1A and 1B, the film support portion 70 is placed on the mounting surface. The film support portion 70 also supports the transparent laminated film 30 on the mounting surface. It is preferable that the film support portion 70 supports the transparent laminated film 30 in a flattened state. This effectively suppresses light reflection in the transparent laminated film 30.

[0031] In Figure 1A, the film support portion 70 has a rectangular shape. In particular, the film support portion 70 as a whole has a rectangular frame shape. The film support portion 70 has a pair of first portions 71 (side edges 71) and a pair of second portions 72 (upper edge 72a and lower edge 72b) extending between the pair of first portions 71. The pair of first portions 71 extend perpendicularly and linearly to the horizontal plane G. The pair of second portions 72 extend parallel and linearly to the horizontal plane G. The upper edge 72a of the film support portion 70 corresponds to the upper edge 30b1 of the transparent laminated film 30. The lower edge 72b of the film support portion 70 corresponds to the lower edge 30b2 of the transparent laminated film 30. The side edges 71 of the film support portion 70 correspond to the side edges 30a of the transparent laminated film 30.

[0032] The pair of first parts 71 and the pair of second parts 72 are connected to each other. The manner in which the first parts 71 and the second parts 72 are connected to each other is not particularly limited. For example, the first parts 71 and the second parts 72 may be connected to each other by screws. Alternatively, the first parts 71 and the second parts 72 may be connected to each other by welding or other means.

[0033] The first portion 71 and the second portion 72 each sandwich the transparent laminated film 30 from the thickness direction of the transparent laminated film 30. Specifically, the pair of first portions 71 sandwich the periphery of the pair of first sides 30a of the transparent laminated film 30 from the thickness direction of the transparent laminated film 30. The pair of second portions 72 sandwich the periphery of the pair of second sides 30b of the transparent laminated film 30 from the thickness direction of the transparent laminated film 30. As a result, the first portion 71 of the film support portion 70 suppresses bending of the first side 30a of the transparent laminated film 30, and the second portion 72 of the film support portion 70 suppresses bending of the second side 30b of the transparent laminated film 30. As a result, the transparent laminated film 30 is supported in a flattened state.

[0034] In the example shown in Figure 1B, the film support portion 70 has a first portion 71 that surrounds the pair of first sides 30a of the transparent laminated film 30, but does not have a second portion 72 that surrounds the pair of second sides 30b of the transparent laminated film 30. In the example shown in Figure 1B, the first portion 71 of the film support portion 70 can suppress the bending of the first sides 30a of the transparent laminated film 30. Furthermore, in the film support portion 70 shown in Figure 1B, the bending of the second sides 30b can be suppressed by adjusting the distance between the pair of first portions 71. That is, by adjusting the distance between the pair of first portions 71, tension can be applied to the transparent laminated film 30, thereby suppressing the bending of the second sides 30b. As a result, the transparent laminated film 30 can be supported in a flattened state.

[0035] Although not shown in the diagram, the film support portion 70 may be a member that suspends the transparent laminated film 30. For example, the film support portion 70 may support the vicinity of the upper second side 30b (upper edge 30b1) of the pair of second sides 30b of the transparent laminated film 30, or it may be fixed to the ceiling, wall, or beam of the room R. When the film support portion 70 supports the transparent laminated film 30 by suspending it, the film support portion 70 may have a weight attached near the lower second side 30b of the pair of second sides 30b. The weight can suppress deformation of the second side 30b of the transparent laminated film 30, thereby allowing the transparent laminated film 30 to be supported more stably. The shape and material of the weight are not particularly limited, as long as it has enough weight to suppress deformation of the second side 30b of the transparent laminated film 30.

[0036] From the viewpoint of more stably supporting the transparent laminated 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.

[0037] The material of the film support portion 70 is not particularly limited, as long as the transparent laminated film 30 is supported by the film support portion 70 in a flattened state. 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 a polyolefin resin such as acrylic resin, PET (polyethylene terephthalate) resin, vinyl chloride, or polyethylene polypropylene.

[0038] The configuration of the film support portion 70 is not particularly limited, as long as it can support the transparent laminated film 30. The configuration of the film support portion 70 may be selected according to the bending stress of the transparent laminated film 30.

[0039] As a method for the film support portion 70 to support the transparent laminated film 30, an example has been described in which the transparent laminated film 30 is sandwiched from the thickness direction by the first portion 71 and the second portion 72, but this is not the only method. For example, the transparent laminated film 30 may be fixed to a single rod-shaped structure using an adhesive film. Alternatively, the transparent laminated film 30 may be attached to a metal rod-shaped structure using a magnet.

[0040] The effects of having a film support portion 70 in the partition 10 will be explained. As will be described later, by using the transparent laminated film 30 in the partition 10, light reflection in the partition is suppressed compared to a partition panel made of a general acrylic sheet. Also, by using the transparent laminated film 30 in the partition 10, the transparency of the partition is improved compared to a partition panel made of a general acrylic sheet. On the other hand, the transparent laminated film 30 described above is more flexible than the acrylic sheet used in general partitions. When the transparent laminated film 30 is bent, wrinkles (wavy shape) may form on the surface of the transparent laminated film 30, as will be described later, making it difficult for users H1 and H2 to see each other.

[0041] In contrast, by supporting the transparent laminated film 30 with the film support portion 70, light reflection can be suppressed and transparency can be improved while suppressing bending of the transparent laminated film 30.

[0042] (Stand section) Next, the stand portion 90 will be described. The stand portion 90 supports the film support portion 70 so that the first surface 301 of the transparent laminated film 30 is perpendicular to the horizontal plane G. The film support portion 70 is provided on the mounting surface via the stand portion 90. The term "perpendicular to the horizontal plane G" of the first surface 301 of the transparent laminated film 30 will be interpreted to include not only cases where the first surface 301 is perpendicular to the horizontal plane G in a strict sense, but also cases where the first surface 301 is substantially perpendicular to the horizontal plane G. 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.

[0043] In Figures 1A and 1B, the stand portion 90 has a first stand portion 91 and a second stand portion 92. The first stand portion 91 is connected to one first portion 71 of the film support portion 70 (the left first portion 71 in Figures 1A and 1B). The second stand portion 92 is connected to the other first portion 71 of the film support portion 70 (the right first portion 71 in Figures 1A and 1B).

[0044] In Figures 1A and 1B, the first stand portion 91 and the second stand portion 92 have a plate-shaped vertical portion 93 extending vertically and a plate-shaped horizontal portion 94 extending horizontally when viewed from the thickness direction of the transparent laminated film 30. 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.

[0045] As shown in Figures 1A to 1C, the stand portion 90 is positioned on the desk T such that the horizontal portions 94 of the first stand portion 91 and the second stand portion 92 are in surface contact with the upper surface of the desk T. This allows the stand portion 90 to support the film support portion 70 so that the first surface 301 of the transparent laminated film 30 is perpendicular to the horizontal plane G.

[0046] The configuration of the stand portion 90 is not particularly limited, as long as it can support the film support portion 70. For example, the material of the stand portion 90 is not particularly limited, as long as it can support 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 it may be a polyolefin resin such as acrylic resin, PET (polyethylene terephthalate) resin, vinyl chloride, or polyethylene polypropylene. The method of connecting the stand portion 90 to the film support portion 70 is not particularly limited, as long as the stand portion 90 can support the film support portion 70. For example, the stand portion 90 may be connected to the film support portion 70 by screw fastening. Alternatively, the stand portion 90 may be integrated with the film support portion 70 by welding or the like.

[0047] (Transparent laminated film) Next, the details of the transparent laminated film 30 will be described. As described above, the transparent laminated film 30 is used in the partition 10. The transparent laminated film 30 may have a protective film attached to protect the first surface 301 or the second surface 302. Here, we will first describe the transparent laminated film 60 with a protective film attached to the transparent laminated film 30. Figures 2A to 2F show an example of the layer configuration of the transparent laminated film 60 with a protective film. As shown in Figures 2A to 2F, the transparent laminated film 60 with a protective film comprises the transparent laminated film 30 according to this embodiment, a first surface protective film 61 that protects the first surface 301 of the transparent laminated film 30, and a second surface protective film 62 that protects the second surface 302 of the transparent laminated film 30.

[0048] The first protective film 61 and the second protective film 62 each serve to prevent scratches on the first surface 301 and the second surface 302 of the transparent laminated film 30, and to prevent contamination of the first surface 301 and the second surface 302 by foreign matter, etc. The first protective film 61 and the second protective film 62 are each detachably attached to the transparent laminated film 30. The first protective film 61 and the second protective film 62 each include a bonding layer (not shown), and may be attached to the transparent laminated film 30 by this bonding layer. The adhesive strength of the bonding layer may be, for example, 0.05 N / 25 mm to 5 N / 25 mm. When using the partition 10 described above, the first protective film 61 and the second protective film 62 are peeled off from the transparent laminated film 30. The material of the first protective film 61 and the second protective film 62 may be, for example, a film made of polyester resin or polyolefin such as polyethylene or polypropylene.

[0049] Next, the layer structure of the transparent laminated film 30 according to this embodiment will be described. As shown in Figures 2A to 2F, the transparent laminated film 30 includes a first anti-reflective layer 40 that constitutes the first surface 301 and a second anti-reflective layer 50 that constitutes the second surface 302. Furthermore, as shown in Figures 2A and 2B, the transparent laminated film 30 may further include a transparent adhesive layer 31 that adheres the first anti-reflective layer 40 and the second anti-reflective layer 50 to each other.

[0050] Specifically, as shown in Figures 2A and 2B, the transparent laminated film 30 has a first anti-reflective layer 40, a transparent adhesive layer 31, and a second anti-reflective layer 50 in that order, from the first surface 301 to the second surface 302. In this case, the first anti-reflective layer 40 of the transparent laminated film 30 is exposed outward from the first surface 301 side. Also, the second anti-reflective layer 50 of the transparent laminated film 30 is exposed outward from the second surface 302 side.

[0051] Furthermore, in the example shown in Figures 2A and 2B, the first surface anti-reflective layer 40 includes a first surface anti-reflective functional layer 41 arranged sequentially from the first surface 301 toward the second surface 302, and a first surface transparent substrate layer 42. The first surface anti-reflective functional layer 41 includes a first surface refractive layer 43 arranged sequentially from the first surface 301 toward the second surface 302, and a first surface hard coat layer 44. The first surface refractive layer 43 also includes a first surface low refractive index layer 45 and a first surface high refractive index layer 46, arranged sequentially from the first surface 301 toward the second surface 302. Here, the first surface high refractive index layer 46 may include a first first surface high refractive index layer 47 and a second first surface high refractive index layer 48, arranged sequentially from the first surface 301 toward the second surface 302, as shown in Figure 2B.

[0052] Furthermore, in the example shown in Figures 2A and 2B, the second surface anti-reflective layer 50 includes a second surface anti-reflective functional layer 51 arranged sequentially from the second surface 302 toward the first surface 301, and a second surface transparent substrate layer 52. The second surface anti-reflective functional layer 51 also includes a second surface refractive layer 53 arranged sequentially from the second surface 302 toward the first surface 301, and a second surface hard coat layer 54. Moreover, the second surface refractive layer 53 includes a second surface low refractive index layer 55 and a second surface high refractive index layer 56 arranged sequentially from the second surface 302 toward the first surface 301. Here, as shown in Figure 2B, the second surface high refractive index layer 56 may include a first second surface high refractive index layer 57 and a second second surface high refractive index layer 58 arranged sequentially from the second surface 302 toward the first surface 301.

[0053] Furthermore, as shown in Figures 2C and 2D, the transparent laminated film 30 may further include a core layer 32 located between the first anti-reflective layer 40 and the second anti-reflective layer 50. In this case, the transparent laminated film 30 may further include a first transparent adhesive layer 31a that bonds the first anti-reflective 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 anti-reflective layer 50 to each other.

[0054] Specifically, as shown in Figures 2C and 2D, the transparent laminated film 30 comprises, in this order from the first surface 301 to the second surface 302, a first anti-reflective layer 40, a first transparent adhesive layer 31a, a core layer 32, a second transparent adhesive layer 31b, and a second anti-reflective layer 50. In this case as well, the first anti-reflective layer 40 of the transparent laminated film 30 is exposed outward from the first surface 301 side. Also, the second anti-reflective layer 50 of the transparent laminated film 30 is exposed outward from the second surface 302 side.

[0055] Furthermore, in the examples shown in Figures 2C and 2D, the first surface anti-reflective layer 40 includes a first surface anti-reflective functional layer 41 arranged sequentially from the first surface 301 to the second surface 302, and a first surface transparent substrate layer 42. The first surface anti-reflective functional layer 41 includes a first surface refractive layer 43 arranged sequentially from the first surface 301 to the second surface 302, and a first surface hard coat layer 44. The first surface refractive layer 43 also includes a first surface low refractive index layer 45 and a first surface high refractive index layer 46, arranged sequentially from the first surface 301 to the second surface 302. Here, the first surface high refractive index layer 46 may include a first first surface high refractive index layer 47 and a second first surface high refractive index layer 48, arranged sequentially from the first surface 301 to the second surface 302, as shown in Figure 2D.

[0056] Furthermore, in the examples shown in Figures 2C and 2D, the second surface anti-reflective layer 50 includes a second surface anti-reflective functional layer 51 arranged sequentially from the second surface 302 toward the first surface 301, and a second surface transparent substrate layer 52. The second surface anti-reflective functional layer 51 also includes a second surface refractive layer 53 arranged sequentially from the second surface 302 toward the first surface 301, and a second surface hard coat layer 54. The second surface refractive layer 53 also includes a second surface low refractive index layer 55 and a second surface high refractive index layer 56, arranged sequentially from the second surface 302 toward the first surface 301. Here, as shown in Figure 2D, the second surface high refractive index layer 56 may include a first second surface high refractive index layer 57 and a second second surface high refractive index layer 58, arranged sequentially from the second surface 302 toward the first surface 301.

[0057] As described above, in the examples shown in Figures 2A to 2D, the first anti-reflective layer 40 has a basic configuration having a first high refractive index layer 46 and a first low refractive index layer 45 on a first transparent substrate layer 42. Also, as described above, the second anti-reflective layer 50 has a basic configuration having a second high refractive index layer 56 and a second low refractive index layer 55 on a second transparent substrate layer 52. The first high refractive index layer 46 (second high refractive index layer 56) and the first low refractive index layer 45 (second low refractive index layer 55) play a role in providing an anti-reflective function through optical interference.

[0058] The first anti-reflective layer 40 (second anti-reflective layer 50) may be further provided with an anti-reflective function through optical interference of three or more layers, such as by adding a medium refractive index layer. However, an excessively multilayer structure is undesirable from a cost-effectiveness standpoint. Therefore, in this embodiment, the first anti-reflective layer 40 (second anti-reflective layer 50) is preferably configured to provide an anti-reflective function through optical interference using two layers: a first high refractive index layer 46 (second high refractive index layer 56) and a first low refractive index layer 45 (second low refractive index layer 55). Alternatively, the first anti-reflective layer 40 (second anti-reflective layer 50) may be configured by making the first hard coat layer 44 (second hard coat layer 54) a medium refractive index layer, and providing an anti-reflective function through optical interference using three layers: a medium refractive index layer, a high refractive index layer, and a low refractive index layer.

[0059] Furthermore, as shown in Figures 2E and 2F, the first refractive layer 43 does not necessarily include the first high refractive index layer 46. Also, as shown in Figures 2E and 2F, the second refractive layer 53 does not necessarily include the second high refractive index layer 56.

[0060] The following describes each layer of the transparent laminated film 30.

[0061] <First anti-reflective layer and second anti-reflective layer> The first anti-reflective layer 40 is a layer for suppressing the reflection of light incident from the first surface 301 side of the transparent laminated film 30. Because the transparent laminated film 30 is equipped with the first anti-reflective layer 40, the reflection of light on the first surface 301 of the transparent laminated film 30 can be suppressed. This improves the visibility of user H2 when, for example, user H1, who is on the first surface 301 side of the transparent laminated film 30, views user H2, who is on the second surface 302 side of the transparent laminated film 30. More specifically, it prevents user H1's own face or other reflections from being projected onto the first surface 301 of the transparent laminated film 30 when user H1 views user H2. This reduces the difficulty in user H1 seeing user H2. Therefore, for example, the visibility of user H2's facial expressions and mouth movements from user H1's perspective can be improved. This facilitates smoother communication between user H1 and user H2. Furthermore, it is possible to suppress the user H1 from experiencing discomfort or fatigue due to light reflected from the first surface 301 of the transparent laminated film 30.

[0062] On the other hand, the second anti-reflective layer 50 is a layer for suppressing the reflection of light incident from the second surface 302 side of the transparent laminated film 30. Because the transparent laminated film 30 is equipped with the second anti-reflective layer 50, the reflection of light on the second surface 302 of the transparent laminated film 30 can be suppressed. As a result, for example, when user H2, who is on the second surface 302 side of the transparent laminated film 30, views user H1, who is on the first surface 301 side of the transparent laminated film 30, the visibility of user H1 can be improved. More specifically, when user H2 views user H1, it is possible to suppress the reflection of user H2's own face, etc., on the second surface 302 of the transparent laminated film 30. As a result, it is possible to suppress the difficulty in user H2 seeing user H1. For this reason, for example, the visibility of user H2's facial expressions and mouth movements of user H1 can be improved. As a result, smooth communication can be achieved between user H1 and user H2. Furthermore, it is possible to suppress the user H2 from experiencing discomfort or fatigue due to light reflected from the second surface 302 of the transparent laminated film 30.

[0063] As described above, the first anti-reflective layer 40 has a first anti-reflective functional layer 41 and a first transparent substrate layer 42. Similarly, as described above, the second anti-reflective layer 50 has a second anti-reflective functional layer 51 and a second transparent substrate layer 52. Here, we will first describe the first transparent substrate layer 42 and the second transparent substrate layer 52.

[0064] [First transparent substrate layer and second transparent substrate layer] The first transparent substrate layer 42 and the second transparent substrate layer 52 are layers that support, for example, the first anti-reflective functional layer 41 and the second anti-reflective functional layer 51, and also increase the overall strength of the first anti-reflective layer 40 and the second anti-reflective layer 50. The material of the first transparent substrate layer 42 and the second transparent substrate layer 52 is not particularly limited as long as it is a transparent material used as a substrate for general films, but from the viewpoint of material cost, productivity, etc., plastic films, plastic sheets, etc. can be appropriately selected depending on the application.

[0065] Materials for plastic films or plastic sheets include materials made from various synthetic resins. Preferred synthetic resins include cellulose resins such as triacetylcellulose resin (TAC), diacetylcellulose, acetate butyrate cellulose, and cellophane; polyester resins such as polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, and polyester thermoplastic elastomers; polyolefin resins such as low-density polyethylene resin (including linear low-density polyethylene resin), medium-density polyethylene resin, high-density polyethylene resin, ethylene α-olefin copolymer, polypropylene resin, polymethylpentene resin, polybutene resin, ethylene-propylene copolymer, propylene-butene copolymer, olefin thermoplastic elastomers, or mixtures thereof; acrylic resins such as poly(meth)acrylate methyl resin, poly(meth)acrylate ethyl resin, and poly(meth)acrylate butyl resin; polyamide resins represented by nylon 6 or nylon 66; polystyrene resin; polycarbonate resin; polyarylate resin; or polyimide resin. Furthermore, the materials of the first transparent substrate layer 42 and the second transparent substrate layer 52 may be cycloolefin polymer (COP) resins or cycloolefin copolymer (COC) resins.

[0066] The first transparent substrate layer 42 and the second transparent substrate layer 52 can be made from the plastic films and plastic sheets described above, either individually or as a mixture of two or more. However, from the viewpoint of flexibility, toughness, and transparency, cellulose resin and polyester resin are more preferred as the materials for the first transparent substrate layer 42 and the second transparent substrate layer 52. Furthermore, from the viewpoint of flexibility, toughness, and transparency, it is preferable that the first transparent substrate layer 42 and the second transparent substrate layer 52 contain triacetylcellulose and polyethylene terephthalate.

[0067] There are no particular restrictions on the thickness of the first transparent substrate layer 42 and the second transparent substrate layer 52, and they can be appropriately selected according to the application. The thickness of the first transparent substrate layer 42 and the second transparent substrate layer 52 may be approximately 5 μm to 130 μm, but considering durability and handling, it is preferable that they be between 10 μm and 100 μm. The thickness of each layer can be calculated, for example, by measuring the thickness at three points on a cross-sectional image taken using a scanning electron microscope (SEM) or scanning transmission electron microscope (STEM), and averaging the values ​​of the three points. When the film thickness to be measured is on the order of μm, it is preferable to use an SEM, and when it is on the order of nm, it is preferable to use a STEM. In the case of an SEM, it is preferable that the acceleration voltage be between 1 kV and 10 kV, and in the case of a STEM, it is preferable that the acceleration voltage be between 10 kV and 30 kV. The film thickness of each layer described below can also be measured in the same way as the film thickness of the first transparent substrate layer 42 and the second transparent substrate layer 52.

[0068] [First anti-reflective layer and second anti-reflective layer] Next, the first anti-reflective layer 41 and the second anti-reflective layer 51 will be described. The first anti-reflective layer 41 and the second anti-reflective layer 51 each play a role in providing the first anti-reflective layer 40 and the second anti-reflective layer 50 with the function of suppressing light reflection.

[0069] Furthermore, the first anti-reflective functional layer 41 may be a coating layer coated on the first transparent substrate layer 42, and the second anti-reflective functional layer 51 may be a coating layer coated on the second transparent substrate layer 52. In this way, by having the first anti-reflective functional layer 41 and the second anti-reflective functional layer 51 be coating layers, the thickness of the first anti-reflective functional layer 41 and the second anti-reflective functional layer 51 can be easily controlled, and desired functions such as the light reflectance and total light transmittance of the transparent laminated film 30 can be easily controlled.

[0070] Preferably, the first anti-reflective functional layer 41 and the second anti-reflective functional layer 51 are made of a cured product containing an acrylic monomer. This makes it possible to form the first anti-reflective functional layer 41 and the second anti-reflective functional layer 51 with high uniformity even with short processing time.

[0071] Here, the first anti-reflective functional layer 41 includes the first refractive layer 43 and the first hard coat layer 44, as described above. The second anti-reflective functional layer 51 also includes the second refractive layer 53 and the second hard coat layer 54, as described above. The first hard coat layer 44 may be a coating layer coated on the first transparent substrate layer 42, and the first refractive layer 43 may be a coating layer coated on the first hard coat layer 44. The second hard coat layer 54 may be a coating layer coated on the second transparent substrate layer 52, and the second refractive layer 53 may be a coating layer coated on the second hard coat layer 54. Thus, because the first refractive layer 43, the first hard coat layer 44, the second refractive layer 53, and the second 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 laminated film 30 can be easily controlled.

[0072] Next, the first hard coat layer 44 and the second hard coat layer 54 will be described.

[0073] {First hard coat layer and second hard coat layer} The first hard coat layer 44 and the second hard coat layer 54 serve to improve the scratch resistance of the first anti-reflective layer 40 and the second anti-reflective 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 hard coat layer 44 and the second 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.

[0074] A thermosetting resin composition is a composition containing at least a thermosetting resin, which hardens upon heating. Examples of thermosetting resins include acrylic resins, urethane resins, phenolic resins, urea-melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. A curing agent is added to these curable resins as needed in the thermosetting resin composition.

[0075] Ionizing radiation-curable resin compositions are compositions containing compounds having ionizing radiation-curable functional groups (hereinafter also referred to as "ionizing radiation-curable compounds"). Examples of ionizing radiation-curable functional groups include ethylenically unsaturated bonding groups such as (meth)acryloyl groups, vinyl groups, and allyl groups, as well as epoxy groups and oxetanyl groups. As ionizing radiation-curable compounds, compounds having ethylenically unsaturated bonding groups are preferred, compounds having two or more ethylenically unsaturated bonding groups are more preferred, and among these, polyfunctional (meth)acrylate compounds having two or more ethylenically unsaturated bonding groups are even more preferred. Both monomers and oligomers can be used as polyfunctional (meth)acrylate compounds. Ionizing radiation refers to electromagnetic waves or charged particle beams that have energy quanta capable of polymerizing or crosslinking molecules, and usually ultraviolet (UV) or electron beams (EB) are used, but other electromagnetic waves such as X-rays and gamma rays, and charged particle beams such as alpha rays and ion beams can also be used.

[0076] Among the polyfunctional (meth)acrylate compounds, examples of difunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexanediol diacrylate. Examples of trifunctional or more (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. Furthermore, the above (meth)acrylate monomers may also be monomers in which part of the molecular skeleton has been modified, and may be monomers modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, etc.

[0077] Furthermore, 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)acrylate can be obtained, for example, by the reaction of polyhydric alcohols and organic diisocyanates with hydroxy(meth)acrylate. Preferred epoxy (meth)acrylates are (meth)acrylates obtained by reacting trifunctional or higher aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, etc. with (meth)acrylic acid, (meth)acrylates obtained by reacting bifunctional or higher aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, etc. with polybasic acids and (meth)acrylic acid, and (meth)acrylates obtained by reacting bifunctional or higher aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, etc. with phenols and (meth)acrylic acid. The above ionizing radiation-curable compounds can be used individually or in combination of two or more.

[0078] When the ionizing radiation-curable compound is an ultraviolet-curable compound, the ionizing radiation-curable composition preferably contains additives such as photopolymerization initiators and photopolymerization accelerators. Examples of photopolymerization initiators include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler ketone, benzoin, benzyl methyl ketal, benzoyl benzoate, α-acyloxime esters, thioxanthones, etc. These photopolymerization initiators preferably have a melting point of 100°C or higher. By setting the melting point of the photopolymerization initiator to 100°C or higher, it is possible to prevent residual photopolymerization initiator from sublimating due to the heat during transparent conductive film formation or crystallization processes, thereby preventing damage to the low resistance of the transparent conductive film. The same applies when using photopolymerization initiators in the high refractive index layer and low refractive index layer described later. Furthermore, photopolymerization accelerators are materials that reduce polymerization inhibition by air during curing and accelerate the curing speed, and examples include one or more selected from p-dimethylaminobenzoate isoamyl ester, p-dimethylaminobenzoate ethyl ester, etc.

[0079] The thickness of the first hard coat layer 44 and the second 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 thickness of the first hard coat layer 44 and the second hard coat layer 54 are within the above range, sufficient hard coat performance can be obtained, and the surface will be less prone to cracking and other damage from external impacts.

[0080] The refractive indices of the first hard coat layer 44 and the second hard coat layer 54 are preferably smaller than those of the first high refractive index layer 46 and the second high refractive index layer 56, more preferably between 1.45 and 1.70, and even more preferably between 1.45 and 1.60. When the refractive indices of the first hard coat layer 44 and the second hard coat layer 54 are within this range, the first hard coat layer 44 and the second hard coat layer 54 each function as a medium refractive index layer. This enables interference between the three layers of the first hard coat layer 44, the first high refractive index layer 46, and the first low refractive index layer 45, as well as interference between the three layers of the second hard coat layer 54, the second high refractive index layer 56, and the second low refractive index layer 55. As a result, light reflection can be effectively suppressed. Furthermore, from the viewpoint of suppressing interference fringes, it is preferable to reduce the difference between the refractive indices of the first hard coat layer 44 and the second hard coat layer 54 and the refractive indices of the first transparent substrate layer 42 and the second transparent substrate layer 52.

[0081] Means for imparting the role of a medium refractive index layer to the first hard coat layer 44 and the second hard coat layer 54 include blending a resin with a high refractive index into the hard coat layer coating liquid and blending particles with a high refractive index. When particles with a high refractive index are blended, whitening or coating defects may occur due to the aggregation of the particles, so the former method (blending a resin with a high refractive index) is preferred. Examples of resins with a high refractive index include the thermosetting resin or ionizing radiation-curable compound described above, into which groups containing sulfur, phosphorus, or bromine, or aromatic rings, etc., are introduced. As for particles with a high refractive index, the same particles as the high refractive index particles used in the first high refractive index layer 46 and the second high refractive index layer 56 described later can be used.

[0082] The refractive indices of each layer, such as the first hard coat layer 44 and the second hard coat layer 54, can be calculated, for example, by fitting the reflection spectrum measured by a reflectance photometer with the reflection spectrum calculated from an optical model of a multilayer thin film using Fresnel coefficients.

[0083] The first hard coat layer 44 and the second hard coat layer 54 can be formed by preparing a coating solution for hard coat layer formation using the above-mentioned curable resin composition, additives such as ultraviolet absorbers and leveling agents as needed, and a diluent, and then applying the coating solution onto a transparent substrate using a conventionally known coating method, drying it, and curing it by irradiating it with ionizing radiation as needed.

[0084] {First and second refractive layers} Next, the first refractive layer 43 and the second refractive layer 53 will be described. The first refractive layer 43 and the second refractive layer 53 play a role in reducing the light reflectivity of the first anti-reflective layer 40 and the second anti-reflective layer 50. As described above, the first refractive layer 43 includes a first low refractive index layer 45 and a first high refractive index layer 46. Similarly, as described above, the second refractive layer 53 includes a second low refractive index layer 55 and a second high refractive index layer 56. Here, we will first describe the first low refractive index layer 45 and the second low refractive index layer 55.

[0085] (First low refractive index layer and second low refractive index layer) The first low refractive index layer 45 and the second low refractive index layer 55 are layers provided on the first high refractive index layer 46 and the second high refractive index layer 56, and play a role in reducing the light reflectivity of the first anti-reflective layer 40 and the second anti-reflective layer 50 by interference using the difference in refractive index between them and the first high refractive index layer 46 and the second high refractive index layer 56. In order to make the first anti-reflective layer 40 and the second anti-reflective layer 50 extremely low reflectivity, the refractive index of the first low refractive index layer 45 and the second low refractive index layer 55 is preferably 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 low refractive index layer 45 and the second low refractive index layer 55, the lower the refractive index of the first anti-reflective layer 40 and the second anti-reflective layer 50 can be, without significantly increasing the refractive index of the first high refractive index layer 46 and the second high refractive index layer 56. On the other hand, if the refractive index of the first low refractive index layer 45 and the second low refractive index layer 55 is made too low, the strength of the first low refractive index layer 45 and the second low refractive index layer 55 tends to decrease. Therefore, by setting the refractive index of the first low refractive index layer 45 and the second low refractive index layer 55 within the above range, it is possible to maintain the strength of the first low refractive index layer 45 and the second low refractive index layer 55 while suppressing the amount of high refractive index particles added to the first high refractive index layer 46 and the second high refractive index layer 56, which is preferable in that it leads to suppression of discoloration and whitening. Furthermore, the thickness of the first low refractive index layer 45 and the second 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. In addition, the first low refractive index layer 45 and the second low refractive index layer 55 may each be formed from multiple layers that satisfy the above refractive index range, but from the viewpoint of cost-effectiveness, two layers or less are preferred, and a single layer is more preferred.

[0086] Methods for forming the first low refractive index layer 45 and the second low refractive index layer 55 can be broadly classified into wet methods and dry methods. Wet methods include forming the layers by a sol-gel method using metal alkoxides, forming the layers by coating with a low refractive index resin such as fluororesin, and forming the layers by coating with a coating solution for forming low refractive index layers that contains low refractive index particles in a resin composition. Dry methods include selecting particles with a desired refractive index from the low refractive index particles described later 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 coating solution for forming low refractive index layers that contains low refractive index particles in a resin composition.

[0087] Low refractive index particles are preferably used to lower their refractive index, that is, to improve anti-reflective properties. They can be inorganic, such as silica or magnesium fluoride, or organic, without limitation. However, from the viewpoint of further improving anti-reflective properties and ensuring good surface hardness, particles with a void structure are preferably used.

[0088] Particles having a structure that contains voids have fine voids inside, and are filled with gases such as air with a refractive index of 1.0, resulting in particles with a low refractive index of their own. Examples of such void-containing particles include inorganic or organic porous particles and hollow particles, such as porous silica, hollow silica particles, or porous polymer particles and hollow polymer particles using acrylic resin. As an inorganic particle, silica particles with voids prepared using the technology disclosed in Japanese Patent Application Publication No. 2001-233611 are a preferred example. As an organic particle, hollow polymer particles prepared using the technology disclosed in Japanese Patent Application Publication No. 2002-80503 are a preferred example. The silica with voids or porous silica described above have a refractive index in the range of 1.18 to 1.44, which is lower than that of general silica particles with a refractive index of about 1.45, and is therefore preferred from the viewpoint of lowering the refractive index of the first low refractive index layer 45 and the second low refractive index layer 55.

[0089] Hollow silica particles are particles that have the function of lowering the refractive index while maintaining the coating strength of the first low refractive index layer 45 and the second low refractive index layer 55. The hollow silica particles used in this embodiment are silica particles with a structure having a cavity inside. Hollow silica particles are silica particles in which the refractive index decreases inversely proportional to the occupancy rate of the internal cavity compared to the original refractive index of the silica particle (refractive index n=approximately 1.45). Therefore, the refractive index of the hollow silica particles as a whole is between 1.18 and 1.44.

[0090] The hollow silica particles are not particularly limited and include, for example, particles having an outer shell and having a porous or hollow interior, such as silica particles prepared using the techniques disclosed in Japanese Patent Publication No. 6-330606, Japanese Patent Publication No. 7-013137, Japanese Patent Publication No. 7-133105, and Japanese Patent Publication No. 2001-233611.

[0091] 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. If the average particle diameter of the primary particles is within the above range, the transparency of the first low refractive index layer 45 and the second low refractive index layer 55 is not impaired, and a good particle dispersion state can be obtained. In particular, hollow particles are used as the low refractive index particles, and the average particle diameter of these hollow particles is 70 nm to 80 nm, which is preferable because it can increase the porosity and lower the refractive index while maintaining an outer shell thickness that does not result in insufficient strength, and it also has an excellent balance with the ideal thickness (approximately 100 nm) of the first low refractive index layer 45 and the second low refractive index layer 55 for lowering the reflectivity.

[0092] In this embodiment, the low refractive index particles used are preferably surface-treated particles. As the surface treatment of the low refractive index particles, surface treatment using a silane coupling agent is more preferable, and among these, surface treatment using a silane coupling agent having a (meth)acryloyl group is preferable. By surface-treating the low refractive index particles, the affinity with the binder resin described later is improved, the dispersion of particles becomes uniform, and aggregation of particles is less likely to occur. As a result, the decrease in transparency of the first low refractive index layer 45 and the second low refractive index layer 55 due to the formation of larger particles due to aggregation, as well as the decrease in the applicability of the layer-forming composition and the decrease in the coating strength of the composition, are suppressed.

[0093] Furthermore, if 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 later, so that the low refractive index particles are well fixed to the binder resin in the coating film of the layer-forming composition. In other words, the low refractive index particles function as a crosslinking agent in the binder resin. This provides a tightening effect on the entire coating film, making it possible to impart excellent surface hardness to the first low refractive index layer 45 and the second low refractive index layer 55 while retaining the inherent flexibility of the binder resin. Consequently, the first low refractive index layer 45 and the second low refractive index layer 55 deform by utilizing their own flexibility, thus possessing shock absorption and restorative properties, which suppresses the occurrence of scratches and results in layers with high surface hardness and excellent scratch resistance.

[0094] 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.

[0095] The content of low refractive index particles in the first low refractive index layer 45 and the second low refractive index layer 55 is preferably 10 parts by mass or more and 250 parts by mass or less, more preferably 50 parts by mass or more and 200 parts by mass or less, and even more preferably 100 parts by mass or more and 180 parts by mass or less, per 100 parts by mass of resin of the first low refractive index layer 45 and the second low refractive index layer 55, respectively. If the content of low refractive index particles is within the above range, good anti-reflective properties and surface hardness can be obtained. Furthermore, the proportion of hollow particles and / or porous particles in the total low refractive index particles contained in the first low refractive index layer 45 and the second 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, respectively.

[0096] As resin compositions included in the layer-forming coating liquid, curable resin compositions are the first to be mentioned. As curable resin compositions, materials similar to those exemplified in the description of the first hard coat layer 44 and the second hard coat layer 54 can be used, and ionizing radiation-curable resin compositions are preferred. Furthermore, fluorine-containing polymers and fluorine monomers that themselves exhibit a low refractive index are also preferably used as resin compositions. Fluorine-containing polymers are polymers of polymerizable compounds that contain at least a fluorine atom in their molecules, and are preferred in that they can impart antifouling and slipperiness. It is preferable that the fluorine-containing polymer is a polymer that has a reactive group in its molecule and functions as a curable resin composition, and it is more preferable that it is a polymer that has an ionizing radiation-curable reactive group and functions as an ionizing radiation-curable resin composition.

[0097] As a fluorine-containing polymer, it is preferable that the polymer contains silicon along with fluorine in order to not only repel dirt on the surface of the low refractive index layer but also to provide the ability to wipe away the repelled dirt. For example, a silicone-containing vinylidene fluoride copolymer, in which a silicone component is contained in the copolymer, is preferred. In this case, examples of silicone components include (poly)dimethylsiloxane, (poly)diethylsiloxane, (poly)diphenylsiloxane, (poly)methylphenylsiloxane, alkyl-modified (poly)dimethylsiloxane, azo group-containing (poly)dimethylsiloxane, dimethyl silicone, phenylmethyl silicone, alkyl / aralkyl-modified silicone, fluorosilicone, polyether-modified silicone, fatty acid ester-modified silicone, methyl hydrogen 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, a component having a dimethylsiloxane structure is preferred as the silicone component.

[0098] The first low refractive index layer 45 and the second low refractive index layer 55 can be formed, for example, by preparing a layer-forming coating solution using low refractive index particles, a resin composition, additives such as ultraviolet absorbers and leveling agents as needed, and a diluent, and then applying the coating solution onto the first high refractive index layer 46 or the second high refractive index layer 56 using a conventionally known coating method, drying, and curing by irradiation with ionizing radiation as needed.

[0099] (First high refractive index layer and second high refractive index layer) The first high refractive index layer 46 and the second high refractive index layer 56 play a role in reducing the light reflectivity of the first anti-reflective layer 40 and the second anti-reflective layer 50 by interference, using the difference in refractive index between them and the first low refractive index layer 45 and the second low refractive index layer 55. The first high refractive index layer 46 and the second high refractive index layer 56 can be formed, for example, from a curable resin composition and a layer-forming coating liquid containing high refractive index particles, respectively.

[0100] From the viewpoint of achieving ultra-low reflectivity of the first surface high refractive index layer 46 and the second surface high refractive index layer 56, it is preferable to have a high refractive index. However, increasing the refractive index requires a large amount of high refractive index particles, which can lead to aggregation of high refractive index particles and cause whitening. For this reason, the refractive index is preferably 1.55 or more and 1.85 or less, and more preferably 1.56 or more and 1.70 or less. Furthermore, the thickness of the first surface high refractive index layer 46 and the second surface high refractive index layer 56 is preferably 200 nm or less, and more preferably 50 nm or more and 180 nm or less. When the first surface high refractive index layer 46 and the second surface high refractive index layer 56 each consist of a two-layer structure as described later, it is preferable that the total thickness of the two layers satisfies the above value. Furthermore, the first surface high refractive index layer 46 and the second surface high refractive index layer 56 may be formed from multiple layers that satisfy the above refractive index range, but from the viewpoint of cost-effectiveness, two layers or less is preferred, and a single layer is more preferred.

[0101] Examples of high refractive index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium dioxide (2.3 to 2.7), cerium oxide (1.95), tin-doped indium oxide (1.95 to 2.00), antimond-doped tin oxide (1.75 to 1.85), yttrium oxide (1.87), and zirconium oxide (2.10). The values ​​in parentheses above 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 from the viewpoint of achieving the above-mentioned suitable refractive index with a small amount of addition. Furthermore, conductive high refractive index particles such as antimony pentoxide, tin-doped indium oxide (ITO), and antimond-doped tin oxide (ATO) have free electrons with plasma frequencies in the near-infrared region. Due to the plasma oscillations of these free electrons, some visible light may be absorbed or reflected, making it difficult to suppress color. For this reason, it is preferable that the high refractive index particles are non-conductive particles. From the above, among the high refractive index particles exemplified above, titanium oxide and zirconium oxide are suitable, and furthermore, from the viewpoint of high durability and stability such as light resistance, zirconium oxide is optimal. If it is desired to impart antistatic properties to the first anti-reflective layer 40 and the second anti-reflective layer 50, it is preferable to have a two-layer structure for the first high refractive index layer 46 and the second high refractive index layer 56 as described later, and to include conductive high refractive index particles in one of the layers.

[0102] The average particle diameter of the primary particles of the high 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. The average particle diameter 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 are taken using SEM, TEM, or STEM of the material, either the particles themselves or a dispersion of the particles coated and dried on a transparent substrate. (2) Extract any 10 particles from the surface image, measure the major and minor axes of each particle, and calculate the particle diameter of each particle from the average of the major and minor axes. The major axis is the longest axis on the screen, and the minor axis is the distance between two points where a line segment perpendicular to the midpoint of the line segment constituting the major axis intersects the particle. (3) Perform the same procedure five times on different images of the same sample, and the average particle diameter is taken from the number average of the particle diameters of a total of 50 particles. When calculating the average particle diameter, it is preferable to use a scanning electron microscope (SEM) if the average particle diameter to be calculated is on the order of micrometers, and it is preferable to use a transmission electron microscope (TEM) or a scanning electron microscope (STEM) if the average particle diameter to be calculated is on the order of nanometers. In the case of an SEM, the acceleration voltage is preferably 1kV to 10kV, and in the case of a TEM or STEM, the acceleration voltage is preferably 10kV to 30kV.

[0103] From the viewpoint of balancing high refractive index, color suppression, and whitening suppression, the content of 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, per 100 parts by mass of the curable resin composition.

[0104] The first high refractive index layer 46 and the second high refractive index layer 56 are preferably dispersion-stabilized to suppress excessive aggregation of high refractive index particles. One means of dispersion stabilization is to add another high refractive index particle having a lower surface charge than the base high refractive index particle. According to this means, the base high refractive index particle gathers appropriately around the other high refractive index particle, and excessive aggregation of the base high refractive index particle can be suppressed. Another means of dispersion stabilization is to use surface-treated particles as high refractive index particles or to add a dispersant to the layer-forming coating liquid.

[0105] As the curable resin composition for forming the first surface high refractive index layer 46 and the second surface high refractive index layer 56, the same materials as those exemplified in the description of the first surface hard coat layer 44 and the second surface hard coat layer 54 can be used, and an ionizing radiation curable resin composition is preferred. Furthermore, in order to obtain the above-mentioned refractive index without excessively adding 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 1.54 or more and 1.70 or less.

[0106] As described above, the first surface high refractive index layer 46 may include a first surface high refractive index layer 47 and a second surface high refractive index layer 48. In this case, it is preferable that the refractive index of the first surface high refractive index layer 47 is higher than that of the second surface high refractive index layer 48. This makes it possible to increase the refractive index difference between the first surface high refractive index layer 46 and the first surface low refractive index layer 45, thereby lowering the reflectance of the first surface anti-reflective layer 40, and also reduces the refractive index difference between the first surface high refractive index layer 46 and the first surface hard coat layer 44, thereby suppressing the generation of interference fringes.

[0107] Furthermore, as described above, the second surface high refractive index layer 56 may include a first second surface high refractive index layer 57 and a second second surface high refractive index layer 58. In this case, similar to the first surface high refractive index layer 46, it is preferable that the refractive index of the first second surface high refractive index layer 57 be higher than that of the second second surface high refractive index layer 58. This makes it possible to increase the refractive index difference between the second surface high refractive index layer 56 and the second surface low refractive index layer 55, thereby lowering the reflectivity of the second surface anti-reflective layer 50, and also reduces the refractive index difference between the second surface high refractive index layer 56 and the second surface hard coat layer 54, thereby suppressing the generation of interference fringes.

[0108] Furthermore, when the first surface high refractive index layer 46 and the second surface high refractive index layer 56 are each configured as two layers, the refractive index of the first surface high refractive index layer 47 and the first second surface high refractive index layer 57 is preferably 1.60 or more and 1.85 or less, and the refractive index of the second surface high refractive index layer 48 and the second second surface high refractive index layer 58 is preferably 1.55 or more and 1.70 or less. Moreover, in the above two-layer configuration, 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 [thickness of the layer containing conductive high refractive index particles < thickness of the layer containing non-conductive high refractive index particles]. By adopting this configuration, antistatic properties can be provided while suppressing the amount of conductive high refractive index particles that may cause discoloration. Furthermore, by networking the conductive high refractive index particles within the layer, antistatic properties can be provided with a small amount of addition, and consequently, discoloration and whitening can be suppressed, which is preferable.

[0109] The first surface high refractive index layer 46 and the second surface high refractive index layer 56 can be formed by preparing a layer-forming coating solution with high refractive index particles, a curable resin composition, additives such as ultraviolet absorbers and leveling agents as needed, and a diluent, and then applying the coating solution onto the first surface hard coat layer 44 or the second surface hard coat layer 54 using a conventionally known coating method, drying, and curing by irradiation with ionizing radiation as needed.

[0110] [Transparent adhesive layer, first transparent adhesive layer, and second transparent adhesive layer] The 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 anti-reflective layer 40, the second anti-reflective layer 50, the core layer 32, and the like to each other. Here, the term "transparent adhesive layer" in this specification is a concept that includes transparent adhesive layers. 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 offer high transparency and high adhesive strength, are preferred.

[0111] Each of the above adhesives can contain various functionalizing agents and stabilizers, etc., within a range that does not impair transparency. Adhesion can also be enhanced by incorporating tackifiers. Furthermore, crosslinking structures can be formed using crosslinking agents such as isocyanates, epoxy compounds, and double bond-containing compounds, depending on the resin.

[0112] The transparent adhesive layer can also be formed using an adhesive (OCA, Optical Clear Adhesive) that is 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 a transparent adhesive layer include the LUCIACS series of optical 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-ei Chemical Co., Ltd.), the OAD series of optical transparent adhesives (manufactured by Toyo Packaging Co., Ltd.), the RA series of coreless double-sided tapes for optical applications (manufactured by Sumilon Co., Ltd.), and the Panaclean series PD-S1 (manufactured by Panac Co., Ltd.). The adhesive strength of these adhesives is generally 10N / 25mm or more.

[0113] 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 anti-reflective layer 40 and the second anti-reflective 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.

[0114] The method for forming the transparent adhesive layer is not particularly limited, and known methods used in the manufacture of adhesive tapes and the like can be employed. Specifically, the transparent adhesive layer can be formed by any method such as coating the surface of a substrate with a coating of an adhesive composition obtained by dissolving or dispersing each component that forms the transparent adhesive layer in a suitable organic solvent or water, and then drying and curing it; coating the substrate with each component that forms the transparent adhesive layer, double bond-containing monomers, oligomers, crosslinking agents, etc., without a solvent, and then crosslinking with radiation or the like; or by an extrusion lamination method.

[0115] When using OCA, a transparent adhesive layer can be formed by peeling off the release film on the easily peelable side of the OCA and bonding the adhesive side to the substrate.

[0116] [Core Layer] The core layer 32 serves to support the first anti-reflective layer 40 and the second anti-reflective layer 50. The core layer 32 can be made of the same material as the first transparent substrate layer 42 and the second transparent substrate layer 52 described above.

[0117] There are no particular restrictions on the thickness of the core layer 32, and it can be appropriately selected depending on the application. The thickness of the core layer 32 may be between 5 μm and 130 μm, but considering durability and handling, it is preferable that it be between 10 μm and 100 μm.

[0118] The thickness of the transparent laminated film 30 described above is preferably 300 μm or less. By having a thickness of 300 μm or less, the transparency of the transparent laminated film 30 can be improved. From the viewpoint of improving transparency and making conversations easier to hear, the thickness of the transparent laminated film 30 is more preferably 260 μm or less, and even more preferably 200 μm or less.

[0119] From the viewpoint of reducing the thickness of the transparent laminated film 30, a transparent laminated film 30 without a core layer 32, as shown in Figures 2A and 2B, is preferred over a transparent laminated film 30 containing a core layer 32, as shown in Figures 2C and 2D. With a transparent laminated film 30 without a core layer 32, as shown in Figures 2A and 2B, it is particularly easy to reduce the thickness of the transparent laminated film 30 to 200 μm or less.

[0120] Furthermore, if the upper limit of the thickness of the transparent laminated film 30 is restricted as described above, the transparent laminated film 30 becomes more flexible. On the other hand, from the viewpoint of suppressing the formation of wrinkles (wavy shape) on the surface of the transparent laminated film 30 due to wind, etc., it is preferable that the transparent laminated film 30 is not easily bent beyond a certain point. By suppressing the formation of wrinkles (wavy shape) on the surface of the transparent laminated film 30 (first surface 301, second surface 302), the difficulty in users H1 and H2 seeing each other due to wrinkles (wavy shape) is suppressed.

[0121] The thickness of the transparent laminated film 30 may be, for example, 60 μm or more and 300 μm or less. A thickness of 60 μm or more makes the transparent laminated film 30 less prone to bending, to the extent that wrinkles (wavy shapes) on its surface are suppressed. Furthermore, a thickness of 60 μm or more effectively suppresses the movement of droplets such as saliva between users H1 and H2 facing each other across the partition 10. Additionally, a thickness of 300 μm or less makes it easier to hear what the other person is saying when conversing across the partition 10.

[0122] Furthermore, the height (vertical distance) of the transparent laminated film 30 may be, for example, 300 mm or more and 900 mm or less, and is preferably 450 mm or more and 700 mm or less. Furthermore, the width (horizontal distance) of the transparent laminated film 30 may be, for example, 300 mm or more and 1800 mm or less, and is preferably 450 mm or more and 1200 mm or less.

[0123] The transparent laminated film 30 described above has, for example, a bending stress of 6 N / 20 mm or less.

[0124] By using the transparent laminated film 30 described above in the partition 10, light reflection in the partition 10 is suppressed. For example, light reflection is suppressed compared to a partition using a typical acrylic partition panel. Furthermore, by using the transparent laminated film 30 described above in the partition 10, the transparency of the partition 10 is improved. For example, the transparency of the partition 10 is improved compared to a partition using a typical acrylic partition panel.

[0125] It is preferable that the light reflectance of the transparent laminated film 30 described above is 3.0% or less. Here, the light reflectance of the transparent laminated film 30 refers to both the reflectance of light incident from the first surface 301 side of the transparent laminated film 30 and the reflectance of light incident from the second surface 302 side of the transparent laminated 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 laminated film 30 is 3.0% or less, and the reflectance of light incident from the second surface 302 side of the transparent laminated film 30 is 3.0% or less. This further improves the visibility of the transparent laminated film 30 when viewed from the first surface 301 side and when viewed from the second surface 302 side. It is more preferable that the light reflectance is 1.0% or less.

[0126] Furthermore, it is preferable that the total light transmittance (JIS K7361-1:1997) of the transparent laminated film 30 is 90% or more. This further improves the visibility of the transparent laminated film 30 when viewed from the first surface 301 side, while also further improving the visibility of the transparent laminated film 30 when viewed from the second surface 302 side. Moreover, it is more preferable that the total light transmittance of the transparent laminated film 30 is 92% or more, and even more preferable that it is 95% or more. Furthermore, it is preferable that the haze (JIS K7136:2000) of the transparent laminated film 30 is 3.0% or less, more preferably 2.0% or less, and even more preferable that it is 1.5% or less.

[0127] In the transparent laminated film 30 described above, the arithmetic mean roughness Ra (JIS B0601:1994) of the first surface 301 and the second surface 302 is preferably 10 nm or less, and more preferably 1 nm to 8 nm. Furthermore, the ten-point mean roughness Rz (JIS B0601:1994) of the first surface 301 and the second surface 302 is preferably 160 nm or less, and more preferably 50 nm to 155 nm. If Ra and Rz are within the above ranges, the first surface 301 and the second surface 302 will have smoothness and improved scratch resistance.

[0128] In the transparent laminated film 30 described above, the puncture strength is preferably 10.0 N or higher. A sufficiently high puncture strength ensures sufficient strength to suppress damage to the transparent laminated film 30 when it is used in the partition 10. The method for measuring the puncture strength will be explained in Example 1 below.

[0129] Such a partition 10 can be placed in a room R, such as a conference room or meeting space, and used to partition the space of room R (see Figures 1A and 1B). In this embodiment, a building B equipped with such a partition 10 is also provided.

[0130] Method for manufacturing transparent laminated film and partition Next, the manufacturing methods for the transparent laminated film 30 and the partition 10 according to this embodiment will be described. Here, we will first describe the manufacturing method for the transparent laminated film 30.

[0131] First, the first surface anti-reflective layer 40 is fabricated. For example, first, a resin film constituting the first surface transparent substrate layer 42 is prepared. Next, a hard coat layer forming solution is applied to the resin film, dried, and irradiated with ultraviolet light to form the first surface hard coat layer 44. Then, a high refractive index layer forming solution is applied to the first surface hard coat layer 44, dried, and irradiated with ultraviolet light to form the first surface high refractive index layer 46. Next, a low refractive index layer forming solution is applied to the first surface high refractive index layer 46, dried, and irradiated with ultraviolet light to form the first surface low refractive index layer 45. In this way, the first surface anti-reflective layer 40 is obtained.

[0132] Next, a second surface anti-reflective layer 50 is prepared. For example, first, a resin film constituting the second surface transparent substrate layer 52 is prepared. Next, a hard coat layer forming solution is applied to the resin film, dried, and irradiated with ultraviolet light to form a second surface hard coat layer 54. Then, a high refractive index layer forming solution is applied to the second surface hard coat layer 54, dried, and irradiated with ultraviolet light to form a second surface high refractive index layer 56. Then, a low refractive index layer forming solution is applied to the second surface high refractive index layer 56, dried, and irradiated with ultraviolet light to form a second surface low refractive index layer 55. In this way, the second surface anti-reflective layer 50 is obtained.

[0133] Then, the first anti-reflective layer 40 and the second anti-reflective layer 50 are bonded to each other via the transparent adhesive layer 31 to produce a transparent laminated film 30. In this way, the transparent laminated film 30 can be produced.

[0134] Next, the first protective film 61 is attached to the first surface 301 of the obtained transparent laminated film 30, and the second protective film 62 is attached to the second surface 302. At this time, the first protective film 61 and the second protective film 62 may each include a bonding layer (not shown), and may be attached to the transparent laminated film 30 by this bonding layer. In this way, a transparent laminated film 60 with protective films can be manufactured. Note that the first protective film 61 and the second protective film 62 may be attached separately to the first anti-reflective layer 40 and the second anti-reflective layer 50, respectively, before the first anti-reflective layer 40 and the second anti-reflective layer 50 are bonded to each other via the transparent adhesive layer 31.

[0135] Next, partition 10 is created.

[0136] First, the transparent laminated film 60 with protective film is processed into a predetermined shape. When manufacturing the partition 10 shown in Figures 1A and 1B, the transparent laminated film 60 with protective film is cut into a rectangular shape having a pair of first sides 30a and a pair of second sides 30b.

[0137] Next, the first protective film 61 and the second protective film 62 are removed from the transparent laminated film 60 with a protective film that has been processed into a predetermined shape. This results in a transparent laminated film 30 that has been processed into a predetermined shape.

[0138] Subsequently, the transparent laminated film 30 is supported by the film support section 70. At this time, the transparent laminated film 30 is supported by the film support section 70 with its first surface 301 and second surface 302 flattened. The stand section 90 is also connected to the film support section 70. This completes the creation of the partition 10.

[0139] As described above, according to this embodiment, the partition 10 comprises a transparent laminated film 30 having a first surface 301 and a second surface 302, and a film support portion 70 that supports the transparent laminated film 30. The transparent laminated film 30 includes a first surface anti-reflective layer 40 constituting the first surface 301 and a second surface anti-reflective layer 50 constituting the second surface 302. This suppresses the reflection of light incident from the first surface 301 side of the transparent laminated film 30 and the reflection of light incident from the second surface 302 side of the transparent laminated film 30. Therefore, the visibility of the transparent laminated film 30 when viewed from the first surface 301 side and the visibility when viewed from the second surface 302 side can be improved. As a result, users H1 and H2 facing each other across the partition 10 can easily see each other. Therefore, smooth communication can be achieved between users H1 and H2. Furthermore, it is possible to suppress the discomfort or fatigue experienced by users H1 and H2 due to light reflected from the first surface 301 or the second surface 302 of the transparent laminated film 30.

[0140] Furthermore, because the partition 10 is equipped with a transparent laminated film 30, it becomes easier to hear what the other person is saying when conversing across the partition 10. This allows for smooth communication between user H1 and user H2. The effects described above will be explained in the embodiments described later.

[0141] Furthermore, according to this embodiment, the transparent laminated film 30 further includes a core layer 32 located between the first anti-reflective layer 40 and the second anti-reflective layer 50. This improves the durability and handling of the transparent laminated film 30.

[0142] Furthermore, according to this embodiment, the transparent laminated film 30 includes a first transparent adhesive layer 31a that bonds the first anti-reflective layer 40 and the core layer 32, and a second transparent adhesive layer 31b that bonds the core layer 32 and the second anti-reflective layer 50. This makes it easy to manufacture a transparent laminated film 30 that includes a core layer 32 located between the first anti-reflective layer 40 and the second anti-reflective layer 50.

[0143] Furthermore, according to this embodiment, the transparent laminated film 30 further includes a transparent adhesive layer 31 that bonds the first anti-reflective layer 40 and the second anti-reflective layer 50 to each other. This makes it possible to easily manufacture the transparent laminated film 30 including the first anti-reflective layer 40 and the second anti-reflective layer 50.

[0144] Furthermore, according to this embodiment, the film support portion 70 supports the transparent laminated film 30 in a flattened state. This suppresses bending of the transparent laminated film 30. As a result, light reflection in the transparent laminated film 30 can be effectively suppressed.

[0145] Furthermore, according to this embodiment, the partition 10 further includes a stand portion 90 that supports the film support portion 70 such that the first surface 301 of the transparent laminated film 30 is perpendicular to the horizontal plane G. This allows the film support portion 70 to be supported such that the first surface 301 of the transparent laminated film 30 is perpendicular to the horizontal plane G.

[0146] Variation Next, we will describe some variations of the partition.

[0147] (First variation) Figure 3A is a perspective view showing an example of the partition 10 according to the first modification. Figure 3B is a front view showing an example of the partition 10 according to the first modification. Note that the bolts 97 and nuts 98, which will be described later, are not shown in Figures 3A and 3B. In the first modification shown in Figures 3A and 3B, the transparent laminated film 30 is loosely held by the film support portion 70. In this case, the transparent laminated film 30 is supported by the film support portion 70 in a state that allows it to move relative to the film support portion 70.

[0148] Figure 4 is a cross-sectional view of the partition 10 shown in Figures 3A and 3B, obtained by cutting along the line IV-IV in Figure 3B near the lower edge 72b of the film support portion 70 and the lower edge 30b2 of the transparent laminated film 30. As shown in Figures 3A, 3B, and 4, the lower edge 72b has a lower edge holding portion (holding portion) 721 that holds the lower edge 30b2, and a pair of lower edge extension portions (extension portions) 722 that extend from the lower edge holding portion 721 to both sides perpendicular to the transparent laminated film 30.

[0149] As shown in Figure 4, the lower edge holding portion 721 has a pair of lower edge opposing portions 723 and a lower edge spacer 724 located between the pair of lower edge opposing portions 723. The pair of lower edge opposing portions 723 are plate-shaped portions having a plate surface perpendicular to the thickness direction of the transparent laminated film 30. As shown in Figure 4, the lower edge holding portion 721 has a first lower edge opposing portion 723a provided on the first surface 301 side of the transparent laminated film 30 and a second lower edge opposing portion 723b provided on the second surface 302 side of the transparent laminated film 30. The height h1 of the lower edge opposing portion 723 is, for example, 20 mm or more. Here, the height h1 is the vertical distance from the upper surface of the lower edge extension portion 722 to the upper end of the lower edge opposing portion 723.

[0150] The lower edge spacer 724 is a plate-shaped member. The lower edge spacer 724 has a first surface 724a and a second surface 724b as its main surfaces. The lower edge spacer 724 is positioned between the first lower edge opposing portion 723a and the second lower edge opposing portion 723b, with the first surface 724a facing the first lower edge opposing portion 723a and the second surface 724b facing the second lower edge opposing portion 723b. The thickness of the lower edge spacer 724 is greater than the thickness of the transparent laminated film 30. The thickness of the lower edge spacer 724 is, for example, 2 mm.

[0151] In this modified example, the lower edge spacer 724 is bonded to the first lower edge opposing portion 723a on the first surface 724a with an adhesive (not shown), and to the second lower edge opposing portion 723b on the second surface 724b with an adhesive (not shown). As a result, the first lower edge opposing portion 723a and the second lower edge opposing portion 723b are connected via the lower edge spacer 724.

[0152] As shown in Figure 4, the lower edge holding portion 721 has a first groove portion 75 into which the lower second edge 30b (lower edge 30b2) of the pair of second edges 30b of the transparent laminated film 30 is inserted. The first groove portion 75 extends along the horizontal direction. In this modified example, the first lower edge opposing portion 723a and the second lower edge opposing portion 723b do not face the lower edge spacer 724 in a portion including the upper end. As a result, the first groove portion 75 is formed in the portion of the first lower edge opposing portion 723a and the second lower edge opposing portion 723b that does not face the lower edge spacer 724. As described above, the thickness of the lower edge spacer 724 is greater than the thickness of the transparent laminated film 30. As a result, the pair of lower edge opposing portions 723 face each other with a distance greater than the thickness of the transparent laminated film 30. For this reason, the width of the first groove 75 in the direction perpendicular to the transparent laminated film 30 (left-right direction in Figure 4) is greater than the thickness of the transparent laminated film 30. The lower edge 30b2 of the transparent laminated film 30 is inserted into the first groove 75, whose width in the direction perpendicular to the transparent laminated film 30 is greater than the thickness of the transparent laminated film 30, and the lower edge 30b2 of the transparent laminated film 30 is loosely held by the film support portion 70. The width of the first groove 75 in the direction perpendicular to the transparent laminated film 30 (left-right direction in Figure 4) is, for example, 2 mm or more. The depth of the first groove 75 (the vertical dimension of the first groove 75) is, for example, 10 mm or more.

[0153] The pair of lower edge extensions 722 are plate-like portions having plate surfaces parallel to the horizontal direction. As shown in Figure 4, the lower edge 72b has a pair of lower edge extensions 722, consisting of a first lower edge extension 722a provided on the first surface 301 side of the transparent laminated film 30 and a second lower edge extension 722b provided on the second surface 302 side of the transparent laminated film 30. The first lower edge extension 722a is connected to the lower part of the first lower edge opposing part 723a. The second lower edge extension 722b is connected to the lower part of the second lower edge opposing part 723b. In this modified example, the first lower edge extension 722a is molded integrally with the first lower edge opposing part 723a. The second lower edge extension 722b is molded integrally with the second lower edge opposing part 723b.

[0154] In the cross-section along the vertical direction and the thickness direction of the transparent laminated film 30 (as shown in Figure 4), the end of the lower edge extension 722 that is opposite to the end connected to the lower part of the lower edge opposing portion 723 is called the side end 722c of the lower edge extension 722. Here, it is preferable that the width W in the direction perpendicular to the transparent laminated film 30 between each side end 722c of the lower edge extension 722 and the transparent laminated film 30 is 20 mm or more. That is, it is preferable that the width W1 in the direction perpendicular to the transparent laminated film 30 between the side end 722c of the first lower edge extension 722a and the first surface 301 of the transparent laminated film 30 is 20 mm or more. Also, it is preferable that the width W2 in the direction perpendicular to the transparent laminated film 30 between the side end 722c of the second lower edge extension 722b and the second surface 302 of the transparent laminated film 30 is 20 mm or more. From the viewpoint of suppressing the movement of droplets between users H1 and H2 facing each other across the partition 10, a larger width W is preferable. With a width W of 20 mm or more, when droplets scattered into the air from users H1 and H2 fall downwards, the lower edge extension 722 can catch them. Therefore, as will be described later, even if a gap S is formed between the lower edge 72b of the film support 70 and the mounting surface, it is possible to suppress the movement of droplets scattered into the air from user H1 (H2) towards user H2 (H1). The width W may be 20 mm or more and 75 mm or less. With a width W of 75 mm or less, as will be described later, when passing items through the gap S, items can be passed smoothly. From the viewpoint of making the passing of items even smoother, a width W of 70 mm or less is more preferable, and 60 mm or less is even more preferable.

[0155] In this modified example, as described above, the width of the first groove 75 is greater than the thickness of the transparent laminated film 30. For this reason, the transparent laminated film 30 is loosely held by the film support portion 70. In this case, the width W is the width between the side edge 722c and the transparent laminated film 30, assuming that the lower edge 30b2 of the transparent laminated film 30 is inserted into the first groove 75 such that the center of the thickness direction of the transparent laminated film 30 coincides with the center of the width direction of the first groove 75.

[0156] The width Wc of the lower edge extension 722 in the direction perpendicular to the transparent laminated film 30 may be, for example, 20 mm or more. By setting the width Wc to 20 mm or more, the width W in the direction perpendicular to the transparent laminated film 30 between the side edge 722c of each lower edge extension 722 and the transparent laminated film 30 becomes at least 20 mm or more. The width Wc is, for example, 20 mm or more and 50 mm or less.

[0157] Figure 5 is a cross-sectional view of the partition 10 shown in Figures 3A and 3B, obtained by cutting along the VV line in Figure 3B near the side edge 71 of the film support portion 70 and the side edge 30a of the transparent laminated film 30. As shown in Figures 3A, 3B, and 5, the side edge 71 has a side edge holding portion 711 that holds the side edge 30a, and a pair of side edge extensions 712 that extend from the side edge holding portion 711 to both sides perpendicular to the transparent laminated film 30.

[0158] As shown in Figure 5, the side-edge holding portion 711 has a pair of side-edge opposing portions 713 and a side-edge spacer 714 located between the pair of side-edge opposing portions 713. The pair of side-edge opposing portions 713 are plate-shaped portions having a plate surface perpendicular to the thickness direction of the transparent laminated film 30. As shown in Figure 5, the side-edge holding portion 711 has a first side-edge opposing portion 713a provided on the first surface 301 side of the transparent laminated film 30 and a second side-edge opposing portion 713b provided on the second surface 302 side of the transparent laminated film 30. Such a side-edge holding portion 711 is connected to the bottom-edge opposing portion 723 described above. That is, the first side-edge opposing portion 713a and the first bottom-edge opposing portion 723a described above are connected to each other. The second side-edge opposing portion 713b and the second bottom-edge opposing portion 723b described above are connected to each other. The height h2 of the side-facing portion 713 is, for example, 20 mm or more. Here, the height h2 is the horizontal distance (left-right direction in Figure 5) from the inner surface of the side-extension portion 712 to the tip of the side-facing portion 713.

[0159] The side spacer 714 is a plate-shaped member. The side spacer 714 has a first surface 714a and a second surface 714b as its main surfaces. The side spacer 714 is positioned between the first side facing portion 713a and the second side facing portion 713b, with the first surface 714a facing the first side facing portion 713a and the second side facing portion 713b. The thickness of the side spacer 714 is greater than the thickness of the transparent laminated film 30. Also, the thickness of the side spacer 714 is equal to the thickness of the bottom spacer 724. The thickness of the side spacer 714 is, for example, 2 mm. The side spacer 714 may or may not be connected to the bottom spacer 724.

[0160] In this modified example, the side spacer 714 is bonded to the first side opposing portion 713a on the first surface 714a with an adhesive (not shown), and to the second side opposing portion 713b on the second surface 714b with an adhesive (not shown). As a result, the first side opposing portion 713a and the second side opposing portion 713b are connected via the side spacer 714.

[0161] As shown in Figure 5, the side-edge holding portion 711 has a second groove portion 76 into which a pair of first edges 30a (side edges 30a) of the transparent laminated film 30 are inserted. The second groove portion 76 extends along the vertical direction. In this modified example, the first side-edge opposing portion 713a and the second side-edge opposing portion 713b do not face the side-edge spacer 714 in a portion including the tip. As a result, the second groove portion 76 is formed in the portions of the first side-edge opposing portion 713a and the second side-edge opposing portion 713b that do not face the side-edge spacer 714. As described above, the thickness of the side-edge spacer 714 is greater than the thickness of the transparent laminated film 30. As a result, the pair of side-edge opposing portions 713 face each other with a distance greater than the thickness of the transparent laminated film 30. For this reason, the width of the second groove portion 76 in the direction perpendicular to the transparent laminated film 30 (vertical direction in Figure 5) is greater than the thickness of the transparent laminated film 30. The side edge 30a of the transparent laminated film 30 is inserted into the second groove 76, which has a width in the direction perpendicular to the transparent laminated film 30 and is greater than the thickness of the transparent laminated film 30, thereby loosely holding the side edge 30a of the transparent laminated film 30 by the film support portion 70. The width of the second groove 76 in the direction perpendicular to the transparent laminated film 30 (vertical direction in Figure 5) is, for example, 2 mm or more. The depth of the second groove 76 is, for example, 10 mm or more. Here, the depth of the second groove 76 is the dimension of the second groove 76 in the direction parallel to the horizontal direction and perpendicular to the thickness direction of the transparent laminated film 30 (left-right direction in Figure 5).

[0162] The pair of side extensions 712 are plate-like portions having plate surfaces parallel in the vertical direction and parallel to the thickness direction of the transparent laminated film 30. As shown in Figure 5, the side 71 has a pair of side extensions 712, a first side extension 712a provided on the first surface 301 side of the transparent laminated film 30, and a second side extension 712b provided on the second surface 302 side of the transparent laminated film 30. The first side extension 712a is connected to the first side opposing portion 713a. The second side extension 712b is connected to the second side opposing portion 713b. In this modified example, the first side extension 712a is molded integrally with the first side opposing portion 713a. The second side extension 712b is molded integrally with the second side opposing portion 713b. Such side extensions 712 are connected to the lower extension 722 described above. In other words, the first side extension 712a and the first lower extension 722a described above are connected to each other. The second side extension 712b and the second lower extension 722b described above are connected to each other. The width Wa of the side extension 712 in the direction perpendicular to the transparent laminated film 30 may be less than or equal to the width Wc of the lower extension 722 described above. The width Wa is, for example, 20 mm or less. As will be described later, the first side extension 712a is provided with a first side through hole 712c (see Figure 8) for connecting the stand portion 90 to the film support portion 70. The second side extension 712b is provided with a second side through hole 712d (see Figure 8) for connecting the stand portion 90 to the film support portion 70.

[0163] Figure 6 is a cross-sectional view of the partition 10 shown in Figures 3A and 3B, obtained by cutting along the line VI-VI in Figure 3B near the upper edge 72a of the film support portion 70 and the upper edge 30b1 of the transparent laminated film 30. As shown in Figures 3A, 3B, and 6, the upper edge 72a has an upper edge support portion 725 that supports the upper edge 30b1, and a pair of upper edge extensions 726 that extend from the upper edge support portion 725 to both sides perpendicular to the transparent laminated film 30.

[0164] As shown in Figure 6, the upper support portion 725 has a pair of upper opposing portions 727. The pair of upper opposing portions 727 are plate-shaped parts having a plate surface perpendicular to the thickness direction of the transparent laminated film 30. As shown in Figure 6, the upper support portion 725 has a pair of upper opposing portions 727, which include a first upper opposing portion 727a provided on the first surface 301 side of the transparent laminated film 30 and a second upper opposing portion 727b provided on the second surface 302 side of the transparent laminated film 30. These upper opposing portions 727 are connected to the side opposing portions 713 described above. That is, the first upper opposing portion 727a and the first side opposing portion 713a described above are connected to each other. The second upper opposing portion 727b and the second side opposing portion 713b described above are connected to each other. The height h3 of the upper opposing portions 727 is, for example, 20 mm or more. Here, height h3 is the vertical distance from the lower surface of the upper extension portion 726 to the lower end of the upper opposing portion 727.

[0165] The pair of upper facing portions 727 are spaced apart by a width greater than the thickness of the transparent laminated film 30 and face each other. In this modified example, the first upper facing portion 727a and the second upper facing portion 727b are spaced apart by the same distance as the first side facing portion 713a and the second side facing portion 713b. Furthermore, no spacer such as the lower edge spacer 724 described above is interposed between the first upper facing portion 727a and the second upper facing portion 727b. As a result, an opening 728 is formed between the first upper facing portion 727a and the second upper facing portion 727b. The transparent laminated film 30 is configured to be inserted through this opening 728 between the first upper facing portion 727a and the second upper facing portion 727b, between the first side facing portion 713a and the second side facing portion 713b, and between the first lower facing portion 723a and the second lower facing portion 723b. As a result, the transparent laminated film 30 is supported by the film support portion 70.

[0166] The pair of upper edge extensions 726 are plate-shaped portions having plate surfaces parallel to the horizontal direction. As shown in Figure 6, the upper edge 72a has a pair of upper edge extensions 726, consisting of a first upper edge extension 726a provided on the first surface 301 side of the transparent laminated film 30 and a second upper edge extension 726b provided on the second surface 302 side of the transparent laminated film 30. The first upper edge extension 726a is connected to the first upper edge opposing portion 727a. The second upper edge extension 726b is connected to the second upper edge opposing portion 727b. In this modified example, the first upper edge extension 726a is molded integrally with the first upper edge opposing portion 727a. The second upper edge extension 726b is molded integrally with the second upper edge opposing portion 727b. Such upper edge extensions 726 are connected to the side edge extensions 712 described above. In other words, the first upper extension 726a and the first side extension 712a described above are connected to each other. The second upper extension 726b and the second side extension 712b described above are connected to each other. The width Wb of the upper extension 726 in the direction perpendicular to the transparent laminated film 30 (left-right direction in Figure 6) may be less than or equal to the width Wc of the lower extension 722 described above. In this modified example, the width Wb is equal to the width Wa of the side extension 712. The width Wb is, for example, 20 mm or less.

[0167] For example, the thicknesses of the lower edge extension 722, the lower edge opposing part 723, the side edge extension 712, the side edge opposing part 713, the upper edge extension 726, and the upper edge opposing part 727 are equal. These thicknesses are, for example, 1.5 mm.

[0168] In this modified example, the first lower edge extension 722a, the first lower edge opposing portion 723a, the first side edge extension 712a, the first side edge opposing portion 713a, the first upper edge extension 726a, and the first upper edge opposing portion 727a are molded as a single unit. Therefore, the first lower edge extension 722a, the first lower edge opposing portion 723a, the first side edge extension 712a, the first side edge opposing portion 713a, the first upper edge extension 726a, and the first upper edge opposing portion 727a have a rectangular frame-like shape as a whole. However, the invention is not limited to this, and for example, the first lower edge extension 722a, the first lower edge opposing portion 723a, the first side edge extension 712a, the first side edge opposing portion 713a, the first upper edge extension 726a, and the first upper edge opposing portion 727a do not have to be molded as a single unit.

[0169] Furthermore, the second lower edge extension 722b, the second lower edge opposing portion 723b, the second side edge extension 712b, the second side edge opposing portion 713b, the second upper edge extension 726b, and the second upper edge opposing portion 727b are molded as a single unit. Therefore, the second lower edge extension 722b, the second lower edge opposing portion 723b, the second side edge extension 712b, the second side edge opposing portion 713b, the second upper edge extension 726b, and the second upper edge opposing portion 727b as a whole have a rectangular frame-like shape. However, this is not limited to this, and for example, the second lower edge extension 722b, the second lower edge opposing portion 723b, the second side edge extension 712b, the second side edge opposing portion 713b, the second upper edge extension 726b, and the second upper edge opposing portion 727b do not have to be molded as a single unit.

[0170] Next, the stand portion 90 will be described. As shown in Figures 3A and 3B, the stand portion 90 of this modified example has a first stand portion 91 and a second stand portion 92. The first stand portion 91 is connected to one side 71 of the film support portion 70 (the left side 71 in Figures 3A and 3B). The second stand portion 92 is connected to the other side 71 of the film support portion 70 (the right side 71 in Figures 3A and 3B).

[0171] The film support portion 70 is movable vertically relative to the stand portion 90. In this modified example, the stand portion 90 can support the film support portion 70 at multiple support positions that differ in the vertical direction.

[0172] The first stand portion 91 and the second stand portion 92 have plate-shaped vertical portions 93 that extend vertically when viewed from the thickness direction of the transparent laminated film 30. Figure 7 is a side view showing the plate-shaped vertical portion 93 of the first stand portion 91 as viewed from the thickness direction of the vertical portion 93. The first stand portion 91 has two through holes 95 arranged horizontally. The two horizontally arranged through holes 95 are collectively referred to as a through hole set 96. The first stand portion 91 has a plurality of through hole sets 96 arranged vertically. The first stand portion 91 in Figure 7 has three sets of through hole sets 96. Although not shown, the second stand portion 92 has the same configuration as the first stand portion 91. That is, the second stand portion 92 has a vertical portion 93 having a plurality of through hole sets 96 arranged vertically.

[0173] Figure 8 is a cross-sectional view of the partition 10 shown in Figures 3A and 3B, taken along the line VIII-VIII in Figure 3B, near the side edge 71 of the film support portion 70, the side edge 30a of the transparent laminated film 30, and the first stand portion 91. The line VIII-VIII in Figure 3B passes through the vertical center of one of the through-hole sets 96 of the first stand portion 91 in Figure 7. As shown in Figure 8, the first side extension portion 712a is provided with one first side through-hole 712c. The second side extension portion 712b is provided with one second side through-hole 712d. The first side through-hole 712c and the second side through-hole 712d are aligned horizontally.

[0174] In Figure 8, the first stand portion 91 and the second stand portion 92 are connected to the side edge 71 of the film support portion 70 by the following method. First, one of the multiple through-hole sets 96 is placed over the first side through-hole 712c and the second side through-hole 712d. That is, one of the two through-holes 95 that make up the through-hole set 96 is placed over the first side through-hole 712c, and the other of the two through-holes 95 that make up the through-hole set 96 is placed over the second side through-hole 712d. Then, the shaft portion of a bolt 97 having a shaft portion and a head with external threads is passed through the first side through-hole 712c and the through-hole 95 that overlaps the first side through-hole 712c. Then, a nut 98 with internal threads is fitted onto the tip of the shaft portion of the bolt 97. Furthermore, the shaft portion of a bolt 97, which has a shaft portion and a head with external threads, is passed through the through hole 95 where the second side through hole 712d and the second side through hole 712d overlap. Then, a nut 98 with internal threads is fitted onto the tip of the shaft portion of the bolt 97. By this method, the first stand portion 91 and the second stand portion 92 can be connected to the side portion 71 of the film support portion 70.

[0175] As described above, the first stand portion 91 and the second stand portion 92 have multiple through-hole sets 96 arranged in the vertical direction. Therefore, even when any of the multiple through-hole sets 96 arranged in the vertical direction are superimposed on the first side through-hole 712c and the second side through-hole 712d, the first stand portion 91 and the second stand portion 92 can be connected to the side 71 of the film support portion 70. This allows the stand portion 90 to support the film support portion 70 at multiple support positions that are different in the vertical direction. When the first stand portion 91 and the second stand portion 92 have three sets of through-hole sets 96, the stand portion 90 can support the film support portion 70 at three support positions that are different in the vertical direction. Furthermore, by changing the through-hole sets 96 that are superimposed on the first side through-hole 712c and the second side through-hole 712d, the film support portion 70 can be moved vertically relative to the stand portion 90.

[0176] As shown in Figure 7, the distance La between the vertical center of one through-hole set 96 and the vertical center of a through-hole set 96 located vertically adjacent to that through-hole set 96 is, for example, 40 mm. When the first stand portion 91 and the second stand portion 92 have three sets of through-hole sets 96 with a distance La of 40 mm, the stand portion 90 can support the film support portion 70 at three support positions that are 40 mm apart in the vertical direction.

[0177] The form of the stand portion 90 is not limited to the examples described above. The stand portion 90 may be capable of supporting the film support portion 70 in a single support position. The film support portion 70 does not necessarily have to be movable in the vertical direction relative to the stand portion 90. Furthermore, if the film support portion 70 is movable in the vertical direction relative to the stand portion 90, the stand portion 90 may allow movement of the film support portion 70 by a method other than that described above. For example, the first side extension portion 712a may be provided with a plurality of first side through holes 712c arranged in the vertical direction, and the second side extension portion 712b may be provided with a plurality of second side through holes 712d arranged in the vertical direction. In this case, the first stand portion 91 and the second stand portion 92 may each have a set of through holes 96. In this case, by overlapping the through-hole assembly 96 with one of the multiple first side through-holes 712c and one of the multiple second side through-holes 712d arranged in the vertical direction, the stand portion 90 can be connected to the film support portion 70 using a bolt 97 and a nut 98. Furthermore, by changing the first side through-holes 712c and the second side through-holes 712d that overlap the through-hole assembly 96, the film support portion 70 can be moved vertically relative to the stand portion 90.

[0178] Referring again to Figure 3B, a gap S with width L is formed between the lower edge 72b of the film support portion 70 and the mounting surface on which the film support portion 70 is placed. The width L is preferably 20 mm or more and 130 mm or less. A width L of 20 mm or more allows for the smooth transfer of items such as documents through the gap S. Furthermore, a width L of 130 mm or less prevents droplets scattered into the air from the user H1 (H2) from moving to the user H2 (H1) side through the gap S. From the viewpoint of making the transfer of items even smoother, a width L of 40 mm or more is more preferable. The width L may also be 40 mm or more and 90 mm or less. From the viewpoint of making the transfer of items even smoother, a width L of 45 mm or more is more preferable. As described above, if the film support portion 70 can be moved vertically relative to the stand portion 90, the width L may satisfy the above numerical range at at least one support position in which the stand portion 90 can support the film support portion 70. Furthermore, the width L may satisfy the above numerical range at all support positions in which the stand portion 90 can support the film support portion 70.

[0179] Here, the transparent laminated film 30 of this modified example has a first anti-reflective layer 40 and a second anti-reflective layer 50, similar to the embodiment described above, and good anti-reflective properties are obtained. This provides the following effects. Consider the case where user H1 of partition 10 hands an item to user H2, who is facing user H1 across partition 10, through a gap S. In this case, the reflection of the item to be handed over and the image of user H1's hand on the transparent laminated film 30 is suppressed from being seen by user H1. Similarly, the reflection of user H2's hand on the transparent laminated film 30 is suppressed from being seen by user H2. As a result, users H1 and H2 can smoothly exchange items without their vision of the other person's hands being obscured by reflections on the transparent laminated film 30.

[0180] Furthermore, the formation of a gap S with a width L that satisfies the above numerical range allows for the placement of wiring and other components through the gap S. In particular, it is assumed that the top surface of the desk T on which the partition 10 is placed may have wiring holes for passing wiring through or plug receptacles for wiring connectors. Even in such cases, wiring and other components can be placed through the gap S without the partition 10 interfering with the wiring holes or plug receptacles. Additionally, the partition 10 can be placed directly above the wiring holes or plug receptacles provided on the top surface of the desk T.

[0181] On the other hand, if a gap S is formed, it is conceivable that droplets such as saliva may move between users H1 and H2 through the gap S. In this modified example, the lower edge 72b of the film support portion 70 has a pair of lower edge extensions 722. The width W in the direction perpendicular to the transparent laminated film 30 between the side end 722c of each lower edge extension 722 and the transparent laminated film 30 is 20 mm or more. By having a width W of 20 mm or more, the movement of droplets such as saliva through the gap S can be suppressed by the lower edge extensions 722. The width W may be 20 mm or more and 75 mm or less. By having a width W of 75 mm or less, the distance Wd between the side end 722c of the first lower edge extension 722a and the side end 722c of the second lower edge extension 722b shown in Figure 4 can be kept small. Therefore, the exchange of items between users H1 and H2 is less likely to be hindered by the lower edge extensions 722. For example, if the width W is 75 mm or less, an A4 size sheet of paper (210 mm wide, 297 mm high) can be passed between users H1 and H2 without being significantly obstructed by the bottom edge extension 722. Also, if the width W is 75 mm or less, a standard postcard size sheet of paper (100 mm wide, 148 mm high) can be passed between users H1 and H2 without being significantly obstructed by the bottom edge extension 722. Furthermore, users H1 and H2 can pass items to each other without their visibility of each other's hands being significantly obstructed by the bottom edge extension 722.

[0182] As described above, in this modified example, a gap S with width L is formed between the lower edge 72b of the film support portion 70 and the mounting surface on which the film support portion 70 is placed. The width L is between 20 mm and 130 mm. This allows users H1 and H2, who are facing each other across the partition 10, to pass documents and other items through the gap S. Also, wiring and other items can be routed through the gap S.

[0183] Furthermore, according to this modified example, the lower edge 72b of the film support portion 70 has a pair of lower edge extensions 722. The width W in the direction perpendicular to the transparent laminated film 30 between the side end 722c of each lower edge extension 722 and the transparent laminated film 30 is 20 mm or more. This allows the movement of droplets such as saliva through the gap S to be suppressed by the lower edge extensions 722. In particular, the width W is 20 mm or more and 75 mm or less. This allows the movement of droplets such as saliva through the gap S to be suppressed by the lower edge extensions 722 without significantly hindering the transfer of items through the gap S.

[0184] Furthermore, according to this modified example, the film support portion 70 is provided on the mounting surface via a stand portion 90. The film support portion 70 is movable vertically relative to the stand portion 90. This allows the width L of the gap S to be adjusted. For example, depending on the environment in which the partition 10 is placed, the width L of the gap S can be adjusted while considering the balance between the effect of making it easier to pass items such as documents and the effect of suppressing the movement of droplets such as saliva through the gap S.

[0185] (Second variation) In the first modified example described above, an example was described in which the lower edge holding portion 721 of the lower edge 72b of the film support portion 70 has a lower edge spacer 724 located between a pair of lower edge opposing portions 723. However, the form of the lower edge holding portion 721 is not limited to this. Figure 9A is a cross-sectional view of the partition 10 according to the second modified example, taken from the vicinity of the lower edge 72b of the film support portion 70 and the lower edge 30b2 of the transparent laminated film 30, with planes parallel to the vertical direction and the thickness direction of the transparent laminated film 30. In this modified example, the holding portion 721 does not have a lower edge spacer 724.

[0186] In this modified example, the lower edge 72b of the film support portion 70 has a support member 729 provided on the lower side of a pair of opposing lower edge portions 723. The support member 729 is a plate-shaped member having a plate surface parallel to the horizontal direction. In this modified example, the support member 729 is bonded to the lower ends of the pair of opposing lower edge portions 723 with an adhesive (not shown). This connects the first opposing lower edge portion 723a and the second opposing lower edge portion 723b via the support member 729. Furthermore, the first opposing lower edge portion 723a, the second opposing lower edge portion 723b, and the support member 729 form the first groove portion 75.

[0187] In this modified example, the support member 729 extends in the thickness direction of the transparent laminated film 30 from the side end 722c of the first lower edge extension 722a to the side end 722c of the second lower edge extension 722b. The support member 729 is bonded to the lower ends of the pair of lower edge extensions 722 with an adhesive (not shown). In this case, since the pair of lower edge extensions 722 are supported by the support member 729, the strength of the lower edge extensions 722 can be improved. This ensures the strength of the lower edge extensions 722 even when the width of the lower edge extensions 722 is particularly long.

[0188] (Third variation) In each of the above-described modifications, an example was given in which a pair of lower edge extensions 722 of the lower edge 72b of the film support portion 70 are molded integrally with the lower edge opposing portion 723. However, the form of the lower edge extension 722 is not limited to this. In the third modification, at least a part of the lower edge extension 722 is made of a film having a layer structure similar to that of the transparent laminated film 30. Figure 9B is a cross-sectional view of an example of the partition 10 according to the third modification, taken near the lower edge 72b of the film support portion 70 and the lower edge 30b2 of the transparent laminated film 30, cut by a plane parallel to the vertical direction and the thickness direction of the transparent laminated film 30. Figure 9C is a cross-sectional view of another example of the partition 10 according to the third modification, different from the example shown in Figure 9B, taken near the lower edge 72b of the film support portion 70 and the lower edge 30b2 of the transparent laminated film 30, cut by a plane parallel to the vertical direction and the thickness direction of the transparent laminated film 30. In this modified example, each lower edge extension 722 has a base portion 722d which is molded integrally with the lower edge opposing portion 723, and an extension film portion 722e which is fixed to the base portion 722d.

[0189] The base portion 722d is a plate-like part having a plate surface parallel to the horizontal direction. The width We of the base portion 722d in the direction perpendicular to the transparent laminated film 30 (left-right direction in Figure 9B) is, for example, 20 mm or less. As an example, the width We is equal to the width Wa of the side extension portion 712 and the width Wb of the top extension portion 726.

[0190] The extension film portion 722e may be composed of a plate-like (film-like) member having a surface parallel to the horizontal direction. The extension film portion 722e may be composed of a film having a layer structure similar to that of the transparent laminated film 30.

[0191] A portion of the extension film portion 722e overlaps the base portion 722d in the vertical direction. In Figure 9B, a portion of the extension film portion 722e overlaps the base portion 722d from above. In Figure 9C, a portion of the extension film portion 722e overlaps the base portion 722d from below. The extension film portion 722e is fixed to the base portion 722d in the portion that overlaps with the base portion 722d.

[0192] The extension film portion 722e extends to a position further away from the transparent laminated film 30 than the end of the base portion 722d. In Figures 9B and 9C, the extension film portion 722e extends to the side end 722c of the extension portion 722.

[0193] Although not shown in the figures, the extension portion 722 may have an extension film support portion that supports and maintains the extension film portion 722e in a planar shape. The extension film support portion may have, for example, a frame-like shape that surrounds the extension film portion 722e. If the extension portion 722 has an extension film support portion, the extension film portion 722e may be fixed to the base portion 722d via the extension film support portion, by fixing the extension film support portion to the base portion 722d.

[0194] In this modified version, the extension portion 722 has an extension film portion 722e. As a result, users H1 and H2 of the partition 10 can see below the extension portion 722 through the extension film portion 722e. Therefore, when users H1 and H2 pass items such as documents through the gap S, they can see the items and their own hands and the hands of the other person through the extension film portion 722e. This allows users H1 and H2 to pass items more smoothly.

[0195] Furthermore, according to this modified example, the extension film portion 722e is made of a film having the same layer structure as the transparent laminated film 30. Therefore, the extension film portion 722e has good anti-reflective properties. As a result, when users H1 and H2 view the item and their own hands and the hands of the other person through the extension film portion 722e, the reflection of images of users H1 and H2 themselves on the extension film portion 722e is suppressed. For this reason, users H1 and H2 can exchange items more smoothly.

[0196] (Fourth variation) In each of the above-described modifications, an example was given in which at least a portion of the pair of lower edge extensions 722 of the lower edge 72b of the film support portion 70 is molded integrally with the lower edge opposing portion 723 of the lower edge holding portion 721. However, the form of the lower edge extension 722 is not limited to this. Figure 9D is a cross-sectional view of the partition 10 according to the fourth modification, taken from the vicinity of the lower edge 72b of the film support portion 70 and the lower edge 30b2 of the transparent laminated film 30, with planes parallel to the vertical direction and the thickness direction of the transparent laminated film 30. In this modification, the lower edge extension 722 is formed from a member that is not molded integrally with the lower edge opposing portion 723 of the lower edge holding portion 721.

[0197] In this modified example, an extension forming member 73 is fixed to the lower side of the pair of lower side opposing parts 723 of the lower side holding part 721 and the lower side spacer 724. The extension forming member 73 is a plate-shaped member having a plate surface parallel to the horizontal direction.

[0198] In this modified example, the extension forming material 73 forms a pair of lower edge extensions 722. In the thickness direction of the transparent laminated film 30, one end of the extension forming material 73 on the first surface 301 side of the transparent laminated film 30 extends to a position further away from the transparent laminated film 30 than the lower edge opposing portion 723. As a result, the portion of the extension forming material 73 on the first surface 301 side forms the first lower edge extension 722a. Also, in the thickness direction of the transparent laminated film 30, one end of the extension forming material 73 on the second surface 302 side of the transparent laminated film 30 extends to a position further away from the transparent laminated film 30 than the lower edge opposing portion 723. As a result, the portion of the extension forming material 73 on the second surface 302 side forms the second lower edge extension 722b.

[0199] The means for fixing the extension forming material 73 to the underside of the pair of lower edge opposing parts 723 and the lower edge spacer 724 are not particularly limited. For example, the extension forming material 73 can be fixed to the underside of the pair of lower edge opposing parts 723 and the lower edge spacer 724 via an adhesive layer such as double-sided tape.

[0200] In this modified form as well, the movement of droplets such as saliva passing through the gap S can be suppressed by the lower edge extension 722. [Examples]

[0201] Next, we will describe specific examples of the above embodiments.

[0202] (Example 1) First, a transparent laminated film 30, as shown in Figure 2C, was fabricated. In this process, the first anti-reflective layer 40 was first prepared. To prepare the first anti-reflective layer 40, a triacetylcellulose film with a thickness of 60 μm (refractive index 1.49) was first prepared as the first transparent substrate layer 42. Next, a hard coat layer forming solution according to the following formulation was applied to the triacetylcellulose film, dried, and irradiated with ultraviolet light to form a first hard coat layer 44 with a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. Subsequently, a high refractive index layer forming solution according to the following formulation was applied to this first hard coat layer 44, dried, and irradiated with ultraviolet light to form a first high refractive index layer 46 with a thickness of 150 nm and a refractive index of 1.63. Next, a coating solution for forming a low refractive index layer according to the following formulation was applied to the first surface high refractive index layer 46, dried, and irradiated with ultraviolet light to form a first surface low refractive index layer 45 with a thickness of 100 nm and a refractive index of 1.30, thereby obtaining a first surface anti-reflective layer 40.

[0203] <Preparation of coating solution for hard coat layer formation> 1.6 parts by mass 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 mass of a diluent (methyl isobutyl ketone / cyclohexanone = 8 / 2) were added and stirred until no undissolved particles remained. 20 parts by mass of a photocurable resin (Arakawa Chemical, Beamset 577) and 20 parts by mass of a high refractive index resin (DIC Corporation, Polylight RX-4800) were added and stirred until no undissolved particles remained. Finally, 0.1 parts by mass of a leveling agent (Dainichi Seika Kogyo, Seika Beam 10-28 (MB)) were added and stirred to prepare a coating solution for hard coat layer formation.

[0204] <Preparation of coating solution for forming a high refractive index layer> 0.1 parts by mass of photopolymerization initiator (BASF, Irgacure 127) and 92.6 parts by mass of diluent (methyl isobutyl ketone / cyclohexanone / methyl ethyl ketone = 4 / 2 / 4) were added and stirred until no undissolved particles remained. 1.25 parts by mass of photocurable resin (Arakawa Chemical, Beamset 577) was added and stirred until no undissolved particles remained. 6 parts by mass of zirconium oxide (Sumitomo Osaka Cement, MZ-230X, solid content 32.5% by mass, average primary particle size 15-50 nm) and 0.05 parts by mass of leveling agent (Dainichi Seika Kogyo, Seika Beam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a high refractive index layer.

[0205] <Preparation of coating solution for forming a low refractive index layer> 0.2 parts by mass of photopolymerization initiator (BASF, Irgacure 127) and 91.1 parts by mass of diluent (MIBK / AN=7 / 3) were added and stirred until no undissolved particles remained. 1.0 part by mass of photocurable resin (Nippon Kayaku Co., Ltd., KAYARAD-PET-30), 7.6 parts by mass of hollow silica particles (solid content 20% by mass, average primary particle size 60 nm), and 0.1 parts by mass of leveling agent (Dainichi Seika Kogyo Co., Ltd., Seika Beam 10-28 (MB)) were added and stirred to prepare a coating solution for forming a low refractive index layer.

[0206] Next, a second anti-reflective layer 50 was fabricated. To fabricate the second anti-reflective layer 50, first, a 60 μm thick triacetylcellulose film (refractive index 1.49) was prepared as the second transparent substrate layer 52. Next, the hard coat layer forming solution according to the above formulation was applied to the triacetylcellulose film, dried, and irradiated with ultraviolet light to form a second hard coat layer 54 with a thickness of 7.3 μm, a refractive index of 1.54, and a pencil hardness of 2H. Then, the high refractive index layer forming solution according to the above formulation was applied to this second hard coat layer 54, dried, and irradiated with ultraviolet light to form a second high refractive index layer 56 with a thickness of 150 nm and a refractive index of 1.63. Then, the low refractive index layer forming solution according to the above formulation was applied to this second high refractive index layer 56, dried, and irradiated with ultraviolet light to form a second low refractive index layer 55 with a thickness of 100 nm and a refractive index of 1.30, thereby obtaining the second anti-reflective layer 50.

[0207] Next, the first anti-reflective layer 40 and the second anti-reflective layer 50 were bonded to each other via a transparent adhesive layer (Panac Corporation, Panaclean series PD-S1, 25 μm thick), a 60 μm thick triacetylcellulose film, and another transparent adhesive layer (Panac Corporation, Panaclean series PD-S1, 25 μm thick) to produce a transparent laminated film 30. The layer structure of the obtained transparent laminated film 30 is as follows. Low flexion / High flexion / Hard court / TAC / Sticky / TAC / Sticky / TAC / Hard court / High flexion / Low flexion In the above, "low refractive index" refers to the first low refractive index layer or the second low refractive index layer (the same applies hereinafter). Also, "high refractive index" refers to the first high refractive index layer or the second high refractive index layer (the same applies hereinafter). Also, "hard coat" refers to the first hard coat layer or the second hard coat layer (the same applies hereinafter). Also, "TAC" refers to triacetylcellulose film (the same applies hereinafter). Furthermore, "adhesive" refers to the transparent adhesive layer. The thickness of the transparent laminated film 30 according to Example 1 was 245.1 μm.

[0208] (1) Reflectance measurement test Next, a reflectance measurement test was performed on the transparent laminated film 30.

[0209] First, a 20mm x 20mm sample was cut from the obtained transparent laminated film 30. Next, a black resin plate was attached to the back of the sample. Then, light was shone onto the surface of the sample at an incident angle of 5°. At this time, the wavelength of the light was set to 550nm and the light was shone onto the surface of the sample. Then, the reflectance spectrum of the light was measured using a spectrophotometer (JASCO Corporation, V-7100) and the reflectance of the light was calculated.

[0210] (2) Transmittance measurement test Furthermore, a transmittance measurement test was conducted on the transparent laminated film 30.

[0211] First, a 20mm x 20mm sample was cut from the obtained transparent laminated film 30. Next, light was shone onto the surface of the sample at an incident angle of 90°. At this time, the wavelength of the light was set to 550nm and the sample surface was shone with light. Then, the transmission spectrum of the light was measured using a spectrophotometer (JASCO Corporation, V-7100), and the transmittance of the light at each wavelength was calculated.

[0212] (3) Haze measurement test Furthermore, a haze measurement test was conducted on the transparent laminated film 30.

[0213] First, a 20mm x 20mm sample was cut from the obtained transparent laminated film 30. Next, the haze was measured using a haze measuring instrument (HM-150, manufactured by Murakami Color Technology Laboratory Co., Ltd.) in the following manner. First, visible light was irradiated onto the transparent laminated film 30 from the first surface 301 side, along the thickness direction of the transparent laminated film 30. Next, the ratio of diffusely transmitted light to total transmitted light was measured. Then, the haze (degree of cloudiness) was expressed as diffusely transmitted light / total transmitted light × 100 (%).

[0214] (4) Puncture resistance test, simple puncture test Furthermore, a puncture resistance test was conducted on the transparent laminated film 30.

[0215] In this test, the puncture strength of the transparent laminated film 30 was measured in accordance with JIS Z1707 7.4. The measuring instrument used was a combination of a Force Tester MCT-2150 manufactured by A&D Corporation and a puncture test jig JM-CL-100N also manufactured by A&D Corporation. Specifically, as shown in Figure 10, a needle 100 was inserted into a fixed specimen of the transparent laminated film 30 from the first surface 301 side, and the maximum stress until the needle 100 penetrated the transparent laminated 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 speed at which the needle 100 was inserted into the transparent laminated film 30 was 50 mm / min (50 mm per minute). The maximum stress was measured for five specimens, and the average value was taken as the puncture strength of the transparent laminated film 30. The measurement environment was 23°C and 50% relative humidity.

[0216] Furthermore, a simplified puncture test was conducted. First, the transparent laminated film 30 was fixed to the base of the puncture test jig JM-CL-100N mentioned above. Next, a mechanical pencil (Mechpencil 0.7 manufactured by Daiso Industries Co., Ltd.) was prepared. The tester then manually punctured the transparent laminated film 30 10 times with the tip of the mechanical pencil. At this time, the lead was not extended from the tip of the mechanical pencil when the simplified puncture test was performed. In this way, the puncture resistance of the transparent laminated film 30 was evaluated.

[0217] (5) Acoustic characteristics evaluation test Furthermore, an acoustic characteristics evaluation test was conducted on partition 10. Figure 11 illustrates the acoustic characteristics evaluation test of partition 10.

[0218] In the acoustic characteristics evaluation test, loudness (sone) was measured in accordance with ISO 532-1. Specifically, as shown in Figure 11, a partition 10 was placed on a desk T in the room. A speaker 101 (OfficeCoreM2, manufactured by eMeet) was placed on the first surface 301 side of the transparent laminated 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 laminated film 30. The loudness measurement system 102 was a device combining an analyzer (Multi-job FFT analyzer OR34, manufactured by OROS Corporation) and a microphone (MicronHon 378B02, manufactured by PCB Corporation). 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 loudness (sone) was calculated by multiplying the measured sound pressure by a coefficient. Loudness (sone) was calculated by first measuring the sound pressure at multiple frequencies between 12.5 Hz and 12800 Hz, and then using these measurement results to calculate the loudness in the analyzer's system. Here, 1 sone is the loudness perceived by a human when listening to a pure tone with a frequency of 1 kHz and a loudness of 40 dB.

[0219] (6) Sensory evaluation test Furthermore, a sensory evaluation test was conducted on partition 10.

[0220] The purpose of the sensory evaluation test will now be explained. The inventors of this case diligently considered partition 10 that would enable smooth communication between users H1 and H2. As a result, the inventors found that in order to achieve smooth communication between users H1 and H2, it is important that voices are easily audible through partition 10. Furthermore, the inventors found 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 and mouth movements through partition 10. Based on these findings, a sensory evaluation test was conducted to evaluate the user experience when partition 10 is actually used.

[0221] In the sensory evaluation test, the 18 test subjects were divided into 9 pairs of two. Next, each of the 9 pairs of subjects was interviewed about whether they could easily see each other when facing each other with partition 10 in between, as shown in Figure 1A for users H1 and H2.

[0222] In this process, each subject was asked to rate their degree of visibility. Specifically, the scores for visibility were set as follows: First, the state without partition 10 (Comparative Example 4, described later) was assigned a score of 3. Second, the state using a commercially available partition (Comparative Example 2, described later) was assigned a score of 0. The commercially available partition had a 2mm thick acrylic plate as a partition panel.

[0223] Then, each subject was asked to rate on a scale of 1 to indicate the degree of visibility when using partition 10 from Example 1.

[0224] In addition, each of the nine pairs of subjects was interviewed about whether they could easily hear each other's voices when conversing across partition 10. During this process, each subject conversed across partition 10 both with their field of vision obstructed by wearing an eye mask and with their field of vision unobstructed.

[0225] In this study, each participant was asked to rate their degree of audibility. Specifically, the audibility score was set as follows: First, participants conversed with each other without using partition 10 (Comparative Example 4, described later), and the score in this case was set to 3 points. Second, participants conversed with each other through a commercially available partition (Comparative Example 2, described later), and the score in this case was set to 0 points. The commercially available partition had a 2mm thick acrylic panel as a divider.

[0226] Then, each participant was asked to rate their level of hearing ease when using partition 10 from Example 1 on a score. The level of hearing ease was determined by a comprehensive evaluation of each participant's performance in both the state with their field of vision obstructed and the state with their field of vision unobstructed. In addition, participants were asked if they noticed anything else while using partition 10.

[0227] (Example 2) Except for the fact that a transparent laminated film 30 shown in Figure 2E was fabricated, a transparent polyethylene terephthalate (PET) film with a thickness of 60 μm was used as the layers corresponding to the first transparent substrate layer 42 and the second transparent substrate layer 52, and the thickness of the transparent laminated film 30 was 160 μm, reflectance measurement tests, transmittance measurement tests, haze measurement tests, puncture resistance tests, simple puncture tests, acoustic property evaluation tests, and sensory evaluation tests were performed in the same manner as in Example 1.

[0228] (Comparative Example 1) Except for using a commercially available 25 μm thick polyethylene terephthalate (PET) film (Lumirror T60, manufactured by Toray Industries, Inc.) instead of the transparent laminated film 30, reflectance measurement tests, transmittance measurement tests, haze measurement tests, puncture resistance tests, simple puncture tests, acoustic property evaluation tests, and sensory evaluation tests were performed in the same manner as in Example 1.

[0229] (Comparative Example 2) Except for using a 2mm thick acrylic sheet, the same as in Example 1, instead of the transparent laminated film 30, which is the same as used in commercially available partitions (Artec Co., Ltd., splash-proof panel partition set extra-large 51450), a reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, and simple puncture test were performed.

[0230] Furthermore, acoustic property evaluation tests and sensory evaluation tests were conducted in the same manner as in Example 1, except that the commercially available partition described above was used instead of the partition 10 using the transparent laminated film 30.

[0231] (Comparative Example 3) Except for using a commercially available 16 μm thick polyethylene terephthalate (PET) film (Toray Industries, Inc., Lumirror 16F68M) instead of the transparent laminated film 30, reflectance measurement tests, transmittance measurement tests, haze measurement tests, puncture resistance tests, and simple puncture tests were performed in the same manner as in Example 1.

[0232] (Comparative Example 4) Except for not using a partition, the acoustic characteristics evaluation test and sensory evaluation test were conducted in the same manner as in Example 1. Specifically, in the acoustic characteristics evaluation test, the loudness (sone) was measured with the speaker 101 and the loudness measurement system 102 separated by 100 cm.

[0233] (Test results) Table 1 shows the results of the reflectance measurement test, transmittance measurement test, haze measurement test, puncture resistance test, simple puncture test, and acoustic properties evaluation test among the above tests.

[0234] [Table 1]

[0235] In the column for the simplified puncture test in Table 1 above, "○" means that the simplified puncture test showed high resistance to puncture. In other words, it means that the tip of the mechanical pencil did not penetrate the transparent laminated film 30. "×" means that the simplified puncture test showed low resistance to puncture. In other words, it means that the tip of the mechanical pencil penetrated the transparent laminated film 30, creating a hole in the transparent laminated film 30.

[0236] As a result, as shown in Table 1, in the reflectance measurement test, Comparative Examples 1, 2, and 3 all showed a high reflectance of 6.0% or more for light with a wavelength of 550 nm. In contrast, in Examples 1 and 2, the reflectance for light with a wavelength of 550 nm was 0.1% and 0.8%, respectively. Thus, the transparent laminated film 30 according to Examples 1 and 2 was able to reduce the reflectance for light with a wavelength of 550 nm.

[0237] 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% for Comparative Examples 1, 2, and 3, respectively. In contrast, the transmittance of light with a wavelength of 550 nm was 98.7% and 98.1% for Examples 1 and 2, respectively. Thus, the transparent laminated film 30 according to Examples 1 and 2 was able to improve the transmittance of light with a wavelength of 550 nm.

[0238] Furthermore, as shown in Table 1, in the haze measurement test, the haze levels for Comparative Example 1 and Comparative Example 3 were 1.4% and 3.5%, respectively. In contrast, the haze levels for Example 1 and Example 2 were 0.7% and 0.6%, respectively. Thus, the transparent laminated film 30 produced by Example 1 and Example 2 showed reduced haze compared to the films produced by Comparative Example 1 and Comparative Example 3.

[0239] Furthermore, as shown in Table 1, in the puncture resistance test, Comparative Examples 1 and 3 had a maximum stress value of 8N or less, making them easily punctured and prone to damage. In contrast, Examples 1 and 2 had a maximum stress value of 10N or more, making them less susceptible to punctures. In addition, in the simplified puncture test, Comparative Examples 1 and 3 showed low resistance to punctures. In contrast, Examples 1 and 2 showed high resistance to punctures. From this, it can be concluded that the films produced by Examples 1 and 2 had greater puncture resistance compared to the films produced by Comparative Example 1 or Comparative Example 3.

[0240] 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. Thus, it was shown that the partition 10 according to Examples 1 and 2 allowed sound to pass more easily from the speaker 101 to the loudness measurement system 102 than the partition according to Comparative Example 2. From these results, it was found that the partition 10 according to Examples 1 and 2 transmits sound better than the partition according to Comparative Example 2.

[0241] The results of the sensory evaluation test are shown in Table 2.

[0242] [Table 2]

[0243] The values ​​shown in the "Visibility" column and the "Audibility" column in Table 2 above are the average scores obtained from interviews with each subject, respectively.

[0244] As a result, as shown in Table 2, in the sensory evaluation test regarding "visibility," when the score for the partition according to Comparative Example 2 was set to 0 points, the average visibility scores for Examples 1 and 2 were greater than 0 points. Also, as shown in Table 2, the average visibility score for Comparative Example 1 was 0.3 points. In contrast, the average visibility scores for Examples 1 and 2 were 2.6 points and 1.9 points, respectively. Thus, it was found that the partitions 10 according to Examples 1 and 2 allowed users to see each other more easily than the partitions according to Comparative Examples 1 and 2.

[0245] Furthermore, interviews with the subjects revealed that with the partition according to Comparative Example 1, wrinkles (wavy shape) formed on the surface of the PET film, making it difficult to see the pair of subjects. Conversely, with the partition 10 according to Example 1, the wrinkles (wavy shape) formed on the surface of the transparent laminated film 30 were smaller compared to the partition according to Comparative Example 1, making it easier to see the pair of subjects. From this, it was found that the transparent laminated film 30 according to Example 1 can reduce the wrinkles (wavy shape) formed on the surface compared to the PET film according to Comparative Example 1, and when used in partition 10, it makes it easier for users to see each other.

[0246] Furthermore, as shown in Table 2, in the sensory evaluation test regarding "hearing ability," when the score for the partition according to Comparative Example 2 was set to 0 points, the average hearing ability scores for Examples 1 and 2 were greater than 0 points. Also, as shown in Table 2, the average hearing ability score for Comparative Example 1 was 0.7 points. In contrast, the average hearing ability scores for Examples 1 and 2 were 1.6 points and 2.0 points, respectively. Thus, it was found that in the partitions 10 according to Examples 1 and 2, users could hear each other's voices more easily than in the partitions according to Comparative Examples 1 and 2.

[0247] As mentioned above, in the acoustic characteristics evaluation test, the measured loudness (sone) in Examples 1 and 2 was 9.0 sone (see Table 1). On the other hand, in Comparative Example 1, the measured loudness was 9.4 sone. In other words, the partition using Comparative Example 1 was found to transmit sound more easily than the partitions 10 using Examples 1 and 2. On the other hand, as shown in Table 2, the average score for "intelligibility" in the sensory evaluation test was higher for the partitions 10 using Examples 1 and 2 than for the partition using Comparative Example 1. In other words, it was found that when using the partitions 10 using Examples 1 and 2, users felt that they could hear each other's voices more easily than when using the partition using Comparative Example 1. Further research is needed to fully explain the reason for this, but it is thought that, for example, in the sensory evaluation test, conditions such as whether users can easily see each other's mouth movements may affect how easily they can hear each other's voices. Specifically, in the partition 10 according to Example 1 and Example 2, the movement of each person's mouth is more visible than in the partition according to Comparative Example 1, which is thought to give users the impression that they can hear each other's voices more easily.

[0248] From the above, it was found that in a face-to-face conversation across a partition, factors such as whether users can easily see each other's mouth movements can also influence whether users feel they can easily hear each other's voices. Furthermore, in a sensory evaluation test in which subjects actually conversed across a partition, it was found that users rated the use of partition 10 according to Example 1 and Example 2 as easier to hear each other's voices than when using the partition according to Comparative Example 1.

[0249] To evaluate a partition 10 in which a gap S of width L is formed between the lower edge 72b of the film support portion 70 and the mounting surface on which the film support portion 70 is placed, as shown in Figures 3A and 3B, tests were conducted on the following additional examples and comparative examples.

[0250] (Example 3) A transparent laminated film 30 was fabricated using the same method as in Example 1. Partitions 10, as shown in Figures 3A and 3B, were fabricated using the fabricated transparent laminated film 30. The width L of the gap S shown in Figure 3B was 45 mm. The width Wc of the lower extension portion 722 in the direction perpendicular to the transparent laminated film 30 was 20 mm. As a result of setting the width Wc to 20 mm, the width W between the side end 722c of each extension portion 722 and the transparent laminated film 30 in the direction perpendicular to the transparent laminated film 30 was 22.5 mm.

[0251] (7) Splash prevention function evaluation test Next, a splash-proof function evaluation test was conducted on partition 10.

[0252] In the droplet prevention function evaluation test, first, as shown in Figure 12, a partition 10 was placed on a desk T in the room. Note that the stand portion 90 of the partition 10 is not shown in Figure 12. The partition 10 was placed at a distance of 400 mm or more from any side of the top surface of the desk T. In addition, an air particle sensor 103 (Omron Corporation, coarse air particle sensor ZN-PD-S) was placed on the second surface 302 side of the transparent laminated film 30. The air particle sensor 103 was placed on the desk T in a horizontal position so that the suction portion 104 that sucks up the particles to be detected was as close as possible to the top surface of the desk T. The distance d3 between the transparent laminated film 30 and the suction portion 104 of the air particle sensor 103 was set to 250 mm. Furthermore, no items other than those related to the test were placed within 1 m of the perimeter of the partition 10.

[0253] In addition, a spray bottle 105 was prepared that could manually dispense liquid from its nozzle by pulling a lever. The capacity of the spray bottle 105 was 30 mL. Next, 30 mL of deionized water was placed in the spray bottle 105. Then, the spray bottle 105 was placed on the first surface 301 side of the transparent laminated film 30 so that the nozzle of the spray bottle 105 faced the transparent laminated film 30. The height d4 from the top surface of the desk T to the nozzle of the spray bottle 105 was set to 370 mm. The distance d5 between the transparent laminated film 30 and the nozzle of the spray bottle 105 was set to 300 mm.

[0254] Next, the lever of the spray bottle 105 was pulled, and the deionized water particles were sprayed towards the partition 10. Then, the air particle sensor 103 was used to count particles with a diameter of 5 μm or larger, and the number of particles per unit volume was determined. The time for the air particle sensor 103 to detect particles was set to 5 seconds. The operation of pulling the lever of the spray bottle 105 and having the air particle sensor 103 count particles to determine the number of particles per unit volume was repeated 12 times. The maximum and minimum values ​​were removed from the number of particles per unit volume obtained from these 12 repetitions, and the average value of the particle count for the remaining 10 repetitions was calculated. This average value was defined as the average number of particles (particles / cf).

[0255] (8) Document transfer evaluation test Next, a document transfer evaluation test was conducted on partition 10.

[0256] In the document transfer evaluation test, similar to the above-mentioned droplet prevention function evaluation test, partition 10 was placed on the indoor desk T. Then, two subjects were made to face each other with partition 10 in between, like the users H1 and H2 in Fig. 3A, and it was evaluated whether the subjects could transfer documents through the gap S. As the documents, ordinary loose-leaf papers stacked to a thickness of 5 mm were used.

[0257] (9) Visual recognition evaluation test of transferred documents Next, a visual recognition evaluation test of transferred documents was conducted on partition 10.

[0258] In the visual recognition evaluation test of transferred documents, for the subject who transferred the document, an interview was conducted on whether the characters written on the received document were easy or difficult to visually recognize through the transparent laminated film 30 when the document was transferred.

[0259] (Example 4) Except that the width L of the gap S was set to 90 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the visual recognition evaluation test of transferred documents were conducted in the same manner as in Example 3.

[0260] (Example 5) Except for the following points, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were performed in the same manner as in Example 3. In the partition 10 according to Example 3, as shown in Figure 9D, the extension forming material 73 was fixed to the lower side of the lower side opposing part 723 of the lower side holding part 721 and the lower side spacer 724. A vinyl chloride resin plate (1 mm thick) was used as the extension forming material 73. At this time, the extension forming material 73 was fixed to the lower side of the lower side opposing part 723 of the lower side holding part 721 and the lower side spacer 724 using double-sided tape. The width Wc of the lower side extension 722 was set to 50 mm. By setting the width Wc to 50 mm, the width W in the direction perpendicular to the transparent laminated film 30 between the side end 722c of each extension 722 and the transparent laminated film 30 was 52.5 mm.

[0261] (Example 6) Except for setting the width L of the gap S to 90 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 5.

[0262] (Comparative Example 5) Except for using a commercially available polyethylene terephthalate (PET) film (Lumirror T60, manufactured by Toray Industries, Inc.) instead of the transparent laminated film 30, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 3.

[0263] (Reference example 1) Except for setting the width L of the gap S to 0 mm, the droplet prevention function evaluation test and the document handover evaluation test were conducted in the same manner as in Example 3.

[0264] (Reference example 2) Except for setting the width L of the gap S to 0 mm, the droplet prevention function evaluation test and the document handover evaluation test were conducted in the same manner as in Example 5.

[0265] (Reference example 3) Except for setting the width L of the gap S to 130 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 3.

[0266] (Reference example 4) Except for setting the width L of the gap S to 165 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 3.

[0267] (Reference example 5) Except for setting the width L of the gap S to 130 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 5.

[0268] (Reference example 6) Except for setting the width L of the gap S to 165 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Example 5.

[0269] (Reference example 7) Except for setting the width Wc to 10 mm, the splash prevention function evaluation test and the document handover evaluation test were conducted in the same manner as in Example 3. By setting the width Wc to 10 mm, the width W in the direction perpendicular to the transparent laminated film 30 between the side end 722c of each extension 722 and the transparent laminated film 30 was 12.5 mm.

[0270] (Reference example 8) Except for setting the width L of the gap S to 45 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Reference Example 7.

[0271] (Reference example 9) Except for setting the width L of the gap S to 90 mm, the splash prevention function evaluation test, document handover evaluation test, and document visibility evaluation test were conducted in the same manner as in Reference Example 7.

[0272] (Reference example 10) Except that the width L of the gap S was set to 130 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the legibility evaluation test of the transferred document were conducted in the same manner as in Reference Example 7.

[0273] (Reference Example 11) Except that the width L of the gap S was set to 165 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the legibility evaluation test of the transferred document were conducted in the same manner as in Reference Example 7.

[0274] (Reference Example 12) Except that the width Wc was set to 0 mm, the droplet prevention function evaluation test and the document transfer evaluation test were conducted in the same manner as in Example 3. By setting the width Wc to 0 mm, the width W in the direction orthogonal to the transparent laminated film 30 between the side end 722c of each extension part 722 and the transparent laminated film 30 was 2.5 mm.

[0275] (Reference Example 13) Except that the width L of the gap S was set to 45 mm, the droplet prevention function evaluation test and the document transfer evaluation test were conducted in the same manner as in Reference Example 12. Also, the legibility evaluation test of the transferred document was conducted in the same manner as in Example 3.

[0276] (Reference Example 14) Except that the width L of the gap S was set to 90 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the legibility evaluation test of the transferred document were conducted in the same manner as in Reference Example 13.

[0277] (Reference Example 15) Except that the width L of the gap S was set to 130 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the legibility evaluation test of the transferred document were conducted in the same manner as in Reference Example 13.

[0278] (Reference Example 16) Except that the width L of the gap S was set to 165 mm, the droplet prevention function evaluation test, the document transfer evaluation test, and the legibility evaluation test of the transferred document were conducted in the same manner as in Reference Example 13.

[0279] The results are shown in Table 3.

[0280] [Table 3]

[0281] In the "Delivery" column of Table 3 above, "○" means that the documents could be delivered through the gap S. "×" means that the documents could not be delivered because the gap S was not formed.

[0282] In the "Visibility" column of Table 3 above, "○" indicates that the text written on the received document was easily visible through the transparent laminated film 30 when the document was handed over, according to the results of the interviews. "×" indicates that the text written on the received document was difficult to see through the transparent laminated film 30 when the document was handed over, according to the results of the interviews.

[0283] As a result, as shown in Table 3, in the partitions 10 according to Examples 3 to 6, and Reference Examples 3 and 5, the width L was 20 mm or more and the width W was 20 mm or more, so the average number of particles could be reduced to 60 (particles / cf) or less. In particular, in the partitions 10 according to Examples 3 to 6, the width L was 40 mm or more and the width W was 20 mm or more, so the average number of particles could be reduced to 10 (particles / cf) or less.

[0284] Furthermore, in the partition 10 according to Examples 3 to 6, the width L was between 20 mm and 130 mm, allowing documents to be passed through the gap S.

[0285] Furthermore, in the partition 10 according to Examples 3 to 6, when documents were handed over, the characters written on the received documents could be easily seen through the transparent laminated film 30. That is, in the partition 10 according to Examples 3 to 6, the reflection of light incident from the first surface 301 side of the transparent laminated film 30 and the reflection of light incident from the second surface 302 side of the transparent laminated film 30 can be suppressed. As a result, the visibility of the transparent laminated film 30 when viewed from the first surface 301 side and the visibility when viewed from the second surface 302 side can be improved. As a result, when documents were handed over, the characters written on the received documents could be easily seen through the transparent laminated film 30.

[0286] It is also possible to combine the multiple components disclosed in each of the above embodiments and variations as needed. Alternatively, some components may be removed from all the components shown in each of the above embodiments and variations. [Explanation of Symbols]

[0287] 10 partitions 30 Transparent Laminated Film 30a First side 30b Second side 301 Page 1 302 2nd page 40 First surface anti-reflection layer 50 Second surface anti-reflection layer 61. First protective film 62. Second protective film 70 Film support section 71 Part 1 72 Part 2 721 Lower edge holding part 722 Lower edge extension 90 Stand section G horizontal plane

Claims

1. A transparent laminated film having a first surface and a second surface located opposite the first surface, A film support portion that supports the transparent laminated film, The transparent laminated film comprises a stand portion that supports the film support portion such that the first surface of the transparent laminated film is perpendicular to the horizontal plane, The transparent laminated film includes a first anti-reflective layer constituting the first surface and a second anti-reflective layer constituting the second surface. The transparent laminated film has an upper edge, a lower edge, and a pair of side edges. The film support portion is a partition having a pair of first portions that sandwich the periphery of the pair of side edges of the transparent laminated film.

2. A transparent laminated film having a first surface and a second surface located opposite the first surface, The system includes a film support portion that supports the transparent laminated film, The transparent laminated film includes a first anti-reflective layer constituting the first surface and a second anti-reflective layer constituting the second surface. The transparent laminated film has an upper edge, a lower edge, and a pair of side edges. The film support portion is a partition having a pair of first portions that sandwich the periphery of the pair of side edges of the transparent laminated film.

3. The partition according to claim 1, wherein the stand portion comprises a first stand portion connected to one of the pair of first portions, and a second stand portion connected to the other of the pair of first portions.

4. The partition according to any one of claims 1 to 3, wherein the transparent laminated film further includes a core layer located between the first anti-reflective layer and the second anti-reflective layer.

5. The partition according to claim 4, wherein the transparent laminated film further includes a first transparent adhesive layer that bonds the first anti-reflective layer and the core layer to each other, and a second transparent adhesive layer that bonds the core layer and the second anti-reflective layer to each other.

6. The partition according to any one of claims 1 to 5, wherein the transparent laminated film further includes a transparent adhesive layer that bonds the first anti-reflective layer and the second anti-reflective layer to each other.

7. The partition according to any one of claims 1 to 6, wherein the thickness of the transparent laminated film is 300 μm or less.

8. The partition according to any one of claims 1 to 7, wherein the light reflectance of the transparent laminated film is 3.0% or less.

9. The partition according to any one of claims 1 to 8, wherein the total light transmittance of the transparent laminated film is 90% or more.

10. The partition according to any one of claims 1 to 9, wherein the film support portion supports the transparent laminated film in a flattened state.

11. The transparent laminated film has an upper edge, a lower edge, and a pair of side edges. The film support portion has a rectangular shape with an upper edge corresponding to the upper edge, a lower edge corresponding to the lower edge, and side edges corresponding to each side edge. The lower edge has a retaining portion that holds the lower edge, and a pair of extensions that extend from the retaining portion to both sides perpendicular to the transparent laminated film. A gap of width L is formed between the lower edge and the mounting surface on which the film support is placed. The width L is 20 mm or more and 130 mm or less. The partition according to any one of claims 1 to 10, wherein the width W in the direction perpendicular to the transparent laminated film between the side end of each extension and the transparent laminated film is 20 mm or more.

12. The transparent laminated film has an upper edge, a lower edge, and a pair of side edges. The film support portion has a rectangular shape with an upper edge corresponding to the upper edge, a lower edge corresponding to the lower edge, and side edges corresponding to each side edge. The lower edge has a retaining portion that holds the lower edge, and a pair of extensions that extend from the retaining portion to both sides perpendicular to the transparent laminated film. A gap of width L is formed between the lower edge and the mounting surface on which the film support is placed. The width L is 20 mm or more and 130 mm or less. The width W between the side end of each extension and the transparent laminated film, in the direction perpendicular to the transparent laminated film, is 20 mm or more. The film support portion is provided on the aforementioned surface via the stand portion, The partition according to claim 1 or 3, wherein the film support portion is movable in the vertical direction relative to the stand portion.

13. The partition according to claim 11 or 12, wherein the width W is 20 mm or more and 75 mm or less.

14. The partition according to any one of claims 11 to 13, wherein the width L is 40 mm or more and 90 mm or less.

15. A building comprising a partition according to any one of claims 1 to 14 and a room, The partition is a building that divides the space of the room.

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