Face shield and transparent laminated film

Abstract

To provide a face shield and a transparent laminate film capable of suppressing adhesion of droplets scattered downward to surrounding structures.SOLUTION: A face shield 10 includes a holding member 20 worn by a wearer H, and a transparent laminate film 30 attached to the holding member 20 and covering at least a portion of the face F of the wearer H. A plurality of first cuts 74a is formed in a lower side 72 of the transparent laminate film 30. A first engagement portion 75a is formed on one side of the first cut portions 74a, and a first locking portion 76a for locking the first engagement portion 75a is formed on the other side of the first cut portion 74a. By locking the first engaging portion 75a to the first locking portion 76a, a first curved surface 77a is formed in the vicinity of the lower side 72 so as to be convex toward a side away from the wearer H.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a face shield and a transparent laminated film.

Background Art

[0002] Conventionally, a face shield for preventing droplets such as saliva from a sneeze or a cough from adhering to the face of a person facing the wearer has been known (see, for example, Patent Document 1). Patent Document 1 discloses a face shield including a shield portion provided in front of the face of the wearer and a frame for holding the shield portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, droplets such as saliva from a sneeze or a cough may scatter not only in the direction facing the wearer but also in the left - right direction and the up - down direction as seen from the wearer. Further, when the droplets scatter downward, there is a possibility that the droplets adhere to a structure (such as a table) used by the wearer, and there is a risk that the structure used by the wearer will be contaminated.

[0005] The present disclosure has been made in consideration of such points, and an object thereof is to provide a face shield and a transparent laminated film capable of suppressing droplets scattered downward from adhering to surrounding structures.

[0006] Another object of the present disclosure is to provide a face shield and a transparent laminated film capable of suppressing droplets scattered from others from adhering to the wearer.

Means for Solving the Problems

[0007] A face shield according to an embodiment is a face shield that protects the wearer's face, and includes a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the wearer's face. The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side edges extending between the upper side and the lower side. A plurality of first cut portions are formed at least on the lower side. A first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion. By locking the first engaging portion to the first locking portion, a first curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side. This is the face shield.

[0008] In the face shield according to an embodiment, a plurality of second cut portions may be formed on the upper side. A second engaging portion is formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion is formed on the other side of the second cut portion. By locking the second engaging portion to the second locking portion, a second curved surface that curves convexly toward the side away from the wearer may be formed in the vicinity of the upper side.

[0009] In the face shield according to an embodiment, by locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, a third curved surface that curves convexly toward the side away from the wearer may be formed between the first curved surface and the second curved surface.

[0010] In the face shield according to an embodiment, the third curved surface may have a linear shape in a vertical cross section.

[0011] A face shield according to an embodiment is a face shield for protecting the wearer's face, comprising a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the wearer's face. The transparent laminated film has a rectangular shape with an upper side, a lower side facing the upper side, and a pair of side edges extending between the upper side and the lower side. In the vicinity of the lower side, a first lower panel and a second lower panel are provided along the extending direction of the lower side. Above the first lower panel and the second lower panel, a lower fixing panel for fixing the first lower panel and the second lower panel is provided. The first lower panel and the second lower panel are separated from each other by a first lower cut portion penetrating the transparent laminated film. The first lower panel and the lower fixing panel are separated from each other by a second lower cut portion penetrating the transparent laminated film. The second lower panel and the lower fixing panel are separated from each other by a third lower cut portion penetrating the transparent laminated film. By fixing the first lower panel and the second lower panel to the lower fixing panel in a state where they are overlapped with each other, a first lower curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side. This is the face shield.

[0012] In a face shield according to an embodiment, a third lower panel and a fourth lower panel are provided along the extending direction of the lower side below the first lower panel and the second lower panel. The third lower panel and the fourth lower panel are separated from each other by a fourth lower cut portion penetrating the transparent laminated film. The first lower panel and the third lower panel are separated from each other by a fifth lower cut portion penetrating the transparent laminated film. The second lower panel and the fourth lower panel are separated from each other by a sixth lower cut portion penetrating the transparent laminated film. By fixing the third lower panel and the fourth lower panel to the lower fixing panel in a state where they are overlapped with each other, a second lower curved surface that curves convexly toward the side away from the wearer may be formed outside the first lower curved surface.

[0013] In the face shield according to one embodiment, the fourth lower cut portion may extend from the lower side.

[0014] In the face shield according to one embodiment, a first upper panel and a second upper panel arranged along the extending direction of the upper side are provided near the upper side, and an upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side of the first upper panel and the second upper panel. The first upper panel and the second upper panel are separated from each other by a first upper cut portion penetrating the transparent laminated film, the first upper panel and the upper fixing panel are separated from each other by a second upper cut portion penetrating the transparent laminated film, and the second upper panel and the upper fixing panel are separated from each other by a third upper cut portion penetrating the transparent laminated film. In a state where the first upper panel and the second upper panel are overlapped with each other, by fixing them to the upper fixing panel, a first upper curved surface that curves convexly toward the side away from the wearer may be formed near the upper side.

[0015] In the face shield according to one embodiment, a third upper panel and a fourth upper panel arranged along the extending direction of the upper side are provided on the upper side of the first upper panel and the second upper panel. The third upper panel and the fourth upper panel are separated from each other by a fourth upper cut portion penetrating the transparent laminated film, the first upper panel and the third upper panel are separated from each other by a fifth upper cut portion penetrating the transparent laminated film, and the second upper panel and the fourth upper panel are separated from each other by a sixth upper cut portion penetrating the transparent laminated film. In a state where the third upper panel and the fourth upper panel are overlapped with each other, by fixing them to the upper fixing panel, a second upper curved surface that curves convexly toward the side away from the wearer may be formed outside the first upper curved surface.

[0016] In the face shield according to one embodiment, the fourth upper cut portion may extend from the upper side.

[0017] In the face shield according to one embodiment, by fixing the first lower panel and the second lower panel to the lower fixing panel and fixing the first upper panel and the second upper panel to the upper fixing panel, an intermediate curved surface that curves convex toward the side away from the wearer may be formed between the first lower curved surface and the first upper curved surface.

[0018] In the face shield according to one embodiment, the intermediate curved surface may have a linear shape in a vertical cross-section.

[0019] A face shield according to one embodiment is a face shield that protects the face of a wearer, and includes a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the face of the wearer. The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. In the transparent laminated film, a pair of first mountain fold portions extending from the upper side and a pair of first valley fold portions extending from the upper side and provided between the pair of first mountain fold portions are formed. The pair of first mountain fold portions extend along the extending direction of the side sides, and the pair of first valley fold portions extend along a direction inclined in the extending direction of the side sides so as to be spaced apart from each other as they go from the upper side toward the lower side. By folding the transparent laminated film along the pair of first mountain fold portions and the pair of first valley fold portions, a front face and an upper face provided above the front face and folded backward from the front face are formed.

[0020] A face shield according to an embodiment is a face shield that protects the wearer's face, and includes a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the wearer's face. The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. A pair of second mountain folds extending from the lower side and a pair of second valley folds extending from the lower side and provided between the pair of second mountain folds are formed on the transparent laminated film. The pair of second mountain folds extend along the extending direction of the side sides, and the pair of second valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other as they go from the lower side to the upper side. By folding the transparent laminated film along the pair of second mountain folds and the pair of second valley folds, a front face and a lower face provided below the front face and folded backward from the front face are formed. This is the face shield.

[0021] In a face shield according to an embodiment, a pair of first mountain folds extending from the upper side and a pair of first valley folds extending from the upper side and provided between the pair of first mountain folds are formed on the transparent laminated film. The pair of first mountain folds extend along the extending direction of the side sides, and the pair of first valley folds extend along a direction inclined in the extending direction of the side sides so as to be separated from each other as they go from the upper side to the lower side. By folding the transparent laminated film along the pair of first mountain folds and the pair of first valley folds, an upper face provided above the front face and folded backward from the front face may be formed.

[0022] In a face shield according to an embodiment, by folding the transparent laminated film along the pair of first mountain folds and the pair of first valley folds and also along the pair of second mountain folds and the pair of second valley folds, a side face extending backward from the front face may be formed on the side of the front face.

[0023] In a face shield according to an embodiment, the holding member may include a pair of attachment portions for holding the transparent laminated film, and openings into which the attachment portions are respectively inserted may be formed near the pair of side edges of the transparent laminated film.

[0024] In a face shield according to an embodiment, the holding member may hold the transparent laminated film so as to be movable in the vertical direction.

[0025] In a face shield according to an embodiment, the light reflectance of the transparent laminated film may be 1.0% or less.

[0026] A transparent laminated film according to an embodiment is a transparent laminated film used for a face shield that protects the wearer's face, has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side edges extending between the upper side and the lower side, and a plurality of first cut portions are formed at least on the lower side, a first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion. By locking the first engaging portion to the first locking portion, a first curved surface that curves convexly toward the side away from the wearer is formed near the lower side. It is a transparent laminated film.

[0027] In a transparent laminated film according to an embodiment, a plurality of second cut portions may be formed on the upper side, a second engaging portion may be formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion may be formed on the other side of the second cut portion. By locking the second engaging portion to the second locking portion, a second curved surface that curves convexly toward the side away from the wearer may be formed near the upper side.

[0028] In the transparent laminated film according to one embodiment, by locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, a third curved surface that curves convexly toward the side away from the wearer may be formed between the first curved surface and the second curved surface.

[0029] In the transparent laminated film according to one embodiment, the third curved surface may have a linear shape in a vertical cross section.

[0030] The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the face of a wearer, and has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. A first lower panel and a second lower panel are provided in the vicinity of the lower side and arranged along the extending direction of the lower side. A lower fixing panel for fixing the first lower panel and the second lower panel is provided on the upper side of the first lower panel and the second lower panel. The first lower panel and the second lower panel are separated from each other by a first lower cut portion penetrating the transparent laminated film. The first lower panel and the lower fixing panel are separated from each other by a second lower cut portion penetrating the transparent laminated film. The second lower panel and the lower fixing panel are separated from each other by a third lower cut portion penetrating the transparent laminated film. In a state where the first lower panel and the second lower panel are overlapped with each other, by fixing them to the lower fixing panel, a first lower curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side. It is a transparent laminated film.

[0031] In a transparent laminated film according to an embodiment, a third lower panel and a fourth lower panel are provided on the lower side of the first lower panel and the second lower panel along the extending direction of the lower side. The third lower panel and the fourth lower panel are separated from each other by a fourth lower cut portion penetrating the transparent laminated film. The first lower panel and the third lower panel are separated from each other by a fifth lower cut portion penetrating the transparent laminated film. The second lower panel and the fourth lower panel are separated from each other by a sixth lower cut portion penetrating the transparent laminated film. In a state where the third lower panel and the fourth lower panel are overlapped with each other, by fixing them to the lower fixing panel, a second lower curved surface that curves convexly toward the side away from the wearer may be formed outside the first lower curved surface.

[0032] In a transparent laminated film according to an embodiment, the fourth lower cut portion may extend from the lower side.

[0033] In a transparent laminated film according to an embodiment, a first upper panel and a second upper panel are provided near the upper side along the extending direction of the upper side. An upper fixing panel for fixing the first upper panel and the second upper panel is provided on the lower side of the first upper panel and the second upper panel. The first upper panel and the second upper panel are separated from each other by a first upper cut portion penetrating the transparent laminated film. The first upper panel and the upper fixing panel are separated from each other by a second upper cut portion penetrating the transparent laminated film. The second upper panel and the upper fixing panel are separated from each other by a third upper cut portion penetrating the transparent laminated film. In a state where the first upper panel and the second upper panel are overlapped with each other, by fixing them to the upper fixing panel, a first upper curved surface that curves convexly toward the side away from the wearer may be formed near the upper side.

[0034] In the transparent laminated film according to an embodiment, a third upper panel and a fourth upper panel are provided on the upper side of the first upper panel and the second upper panel along the extending direction of the upper side. The third upper panel and the fourth upper panel are separated from each other by a fourth upper cut portion penetrating the transparent laminated film. The first upper panel and the third upper panel are separated from each other by a fifth upper cut portion penetrating the transparent laminated film. The second upper panel and the fourth upper panel are separated from each other by a sixth upper cut portion penetrating the transparent laminated film. In a state where the third upper panel and the fourth upper panel are overlapped with each other, by fixing them to the upper fixing panel, a second upper curved surface that curves convexly toward the side away from the wearer may be formed outside the first upper curved surface.

[0035] In the transparent laminated film according to an embodiment, the fourth upper cut portion may extend from the upper side.

[0036] In the transparent laminated film according to an embodiment, by fixing the first lower panel and the second lower panel to the lower fixing panel and fixing the first upper panel and the second upper panel to the upper fixing panel, an intermediate curved surface that curves convexly toward the side away from the wearer may be formed between the first lower curved surface and the first upper curved surface.

[0037] In the transparent laminated film according to an embodiment, the intermediate curved surface may have a linear shape in a vertical cross section.

[0038] The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the face of the wearer. It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. A pair of first mountain fold portions extending from the upper side, and a pair of first valley fold portions extending from the upper side and provided between the pair of first mountain fold portions are formed. The pair of first mountain fold portions extend along the extending direction of the side sides, and the pair of first valley fold portions extend along a direction inclined in the extending direction of the side sides so as to be spaced apart from each other as they go from the upper side to the lower side. By folding along the pair of first mountain fold portions and the pair of first valley fold portions, a front surface and an upper surface provided above the front surface and folded backward from the front surface are formed. It is a transparent laminated film.

[0039] The transparent laminated film according to one embodiment is a transparent laminated film used for a face shield that protects the face of the wearer. It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. A pair of second mountain fold portions extending from the lower side, and a pair of second valley fold portions extending from the lower side and provided between the pair of second mountain fold portions are formed. The pair of second mountain fold portions extend along the extending direction of the side sides, and the pair of second valley fold portions extend along a direction inclined in the extending direction of the side sides so as to be spaced apart from each other as they go from the lower side to the upper side. By folding along the pair of second mountain fold portions and the pair of second valley fold portions, a front surface and a lower surface provided below the front surface and folded backward from the front surface are formed. It is a transparent laminated film.

[0040] In a transparent laminated film according to an embodiment, a pair of first mountain fold portions extending from the upper side and a pair of first valley fold portions extending from the upper side and provided between the pair of first mountain fold portions are formed. The pair of first mountain fold portions extend along the extending direction of the side side, and the pair of first valley fold portions extend along a direction inclined in the extending direction of the side side so as to be separated from each other as they go from the upper side to the lower side. By folding along the pair of first mountain fold portions and the pair of first valley fold portions, an upper surface provided above the front surface and folded backward from the front surface may be formed.

[0041] In a transparent laminated film according to an embodiment, by folding along the pair of first mountain fold portions and the pair of first valley fold portions and also folding along the pair of second mountain fold portions and the pair of second valley fold portions, a side surface extending rearward from the front surface may be formed on the side of the front surface.

[0042] In a transparent laminated film according to an embodiment, the light reflectance may be 1.0% or less.

[0043] A face shield according to an embodiment is a face shield that protects the wearer's face, and includes a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the wearer's face. The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. By curving the vicinity of the lower side, a first curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side.

[0044] A face shield according to an embodiment is a face shield that protects the wearer's face, and includes a holding member worn by the wearer and a transparent laminated film attached to the holding member and covering at least a part of the wearer's face. The transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. By curving the vicinity of the upper side, a second curved surface is formed in the vicinity of the upper side so as to be convex toward the side away from the wearer.

[0045] A transparent laminated film according to an embodiment is a transparent laminated film used for a face shield that protects the wearer's face. It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. By curving the vicinity of the lower side, a first curved surface is formed in the vicinity of the lower side so as to be convex toward the side away from the wearer.

[0046] A transparent laminated film according to an embodiment is a transparent laminated film used for a face shield that protects the wearer's face. It has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side. By curving the vicinity of the upper side, a second curved surface is formed in the vicinity of the upper side so as to be convex toward the side away from the wearer.

Advantages of the Invention

[0047] According to the present disclosure, it is possible to suppress the adhesion of droplets scattered downward to surrounding structures.

[0048] Moreover, according to the present disclosure, it is possible to suppress the adhesion of droplets scattered from others to the wearer.

Brief Description of the Drawings

[0049]

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Figure 9D

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Best Mode for Carrying Out the Invention

[0050] < First Embodiment > Hereinafter, a first embodiment will be described with reference to the drawings. FIGS. 1 to 9D are diagrams showing the first embodiment. Each of the diagrams shown below is a diagram schematically shown. Therefore, the size and shape of each part are appropriately exaggerated for easy understanding. Further, it can be implemented with appropriate changes without departing from the technical idea. In each of the diagrams shown below, the same parts are denoted by the same reference numerals, and some detailed descriptions may be omitted. Also, the numerical values such as the dimensions of each member described in this specification and the material names are examples as an embodiment, and are not limited thereto, and can be appropriately selected and used. In this specification, terms specifying shapes and geometric conditions, such as terms such as parallel, orthogonal, and perpendicular, shall be interpreted to include not only the strictly meant meaning but also substantially the same state.

[0051] Face Shield First, the face shield 10 will be described with reference to FIG. 1. This face shield 10 serves to protect the face F of the wearer H. As shown in FIG. 1, the face shield 10 includes a holding member 20 worn by the wearer H, and a shield portion 30A (transparent laminated film 30) attached to the holding member 20 and covering at least a part of the face F of the wearer H.

[0052] (Holding Member) The holding member 20 is a member that holds the shield portion 30A so that a desired gap is formed between the nose N, mouth, etc. of the wearer H and the shield portion 30A when the wearer H wears the face shield 10. As shown in FIGS. 1 to 3, the holding member 20 includes a pair of temple portions 21 including ear hooks 22 worn on the ears E of the wearer H, and a connecting portion 23 that connects the pair of temple portions 21 to each other from behind the wearer H (see FIGS. 1 and 3).

[0053] Among these, the ear hook portion 22 of the temple portion 21 extends in a substantially arc shape. And when the ear hook portion 22 contacts the wearer's ear E from above, the face shield 10 is adapted to be worn by the wearer H. In addition, in the present embodiment, only the ear hook portion 22 of the face shield 10 can contact the wearer H.

[0054] Also, as shown in FIGS. 1 to 3, the temple portion 21 of the holding member 20 is provided in front of the ear hook portion 22 and includes a pair of attachment portions 25 for holding the shield portion 30A. This attachment portion 25 is adapted to be inserted into an opening 80 (described later) formed in the transparent laminated film 30.

[0055] In the present embodiment, the attachment portion 25 may be formed by bending the tip of a rod-shaped member (described later). This attachment portion 25 includes a first protruding portion 26 and a second protruding portion 27 located in front of the first protruding portion 26. The first protruding portion 26 is constituted by the tip of the rod-shaped member and protrudes away from the face F of the wearer H along the horizontal direction. Thereby, it is possible to suppress the first protruding portion 26 from contacting the face F of the wearer H. As described above, the first protruding portion 26 is constituted by the tip of the rod-shaped member, and the height of the first protruding portion 26 is equal to the diameter of the rod-shaped member.

[0056] The second protruding portion 27 is constituted by folding the rod-shaped member and protrudes away from the face F of the wearer H along the horizontal direction. Thereby, it is possible to suppress the second protruding portion 27 from contacting the face F of the wearer H. As described above, the second protruding portion 27 is constituted by folding the rod-shaped member, and the height of the second protruding portion 27 is more than twice the diameter of the rod-shaped member.

[0057] The holding member 20 holds the shield part 30A so as to be movable in the vertical direction. In this case, a clearance is provided between the first protruding portion 26 and a first opening portion 81 described later, and a clearance is provided between the second protruding portion 27 and a second opening portion 82 described later. Thereby, even when the shield part 30A comes into contact with surrounding structures, the shield part 30A moves with respect to the holding member 20, so that an impact is applied from the face shield 10 to the wearer H, or the face shield 10 comes off from the wearer H can be suppressed. Note that the clearance between the second protruding portion 27 and the second opening portion 82 described later may be larger than the clearance between the first protruding portion 26 and the first opening portion 81 described later. Also, almost no clearance may be provided between the first protruding portion 26 and the first opening portion 81 described later. Even in this case, the shield part 30A can move in the vertical direction so as to rotate about the central axis of the first protruding portion 26.

[0058] Further, a weight 24 for adjusting the inclination of the temple part 21 with respect to the horizontal direction is attached to the connecting part 23. Thereby, it is possible to suppress the shield part 30A from coming into contact with the face F of the wearer H. As will be described later, the holding member 20 according to the present embodiment is formed of a metal rod-shaped member, and as described above, the holding member 20 according to the present embodiment is configured such that only the earhook part 22 can come into contact with the wearer H. Even with such a simple-structured holding member 20, since the weight 24 for adjusting the inclination of the temple part 21 with respect to the horizontal direction is attached to the connecting part 23, it is possible to suppress the shield part 30A from coming into contact with the face F of the wearer H. Therefore, a face shield 10 having desired performance can be manufactured at low cost.

[0059] In this embodiment, the temple part 21 and the connecting part 23 are integrally formed. Further, the holding member 20 is made of a metal rod-shaped member. Thereby, even when the face shield 10 is dropped, damage to the holding member 20 can be suppressed. In the illustrated example, the rod-shaped member is composed of a round bar. The diameter of this round bar may be, for example, about 1 mm or more and 5 mm or less, and preferably 2 mm or more and 3 mm or less. When the diameter of the round bar is 2 mm or more, a decrease in the strength of the holding member 20 can be suppressed. Also, when the diameter of the round bar is 3 mm or less, the weight of the holding member 20 can be reduced.

[0060] Further, the metal constituting the rod-shaped member is preferably aluminum. Thereby, the holding member 20 can be easily formed. Also, the weight of the holding member 20 can be reduced. Also, the metal may be stainless steel, titanium, or the like. Note that the holding member 20 may be made of a resin rod-shaped member. Thereby, further weight reduction of the holding member 20 can be achieved. Also, since the holding member 20 is made of resin, when the holding member 20 is bent, it is possible to suppress the formation of kinks in the holding member 20. In this case, the resin material used for the holding member 20 can be selected from commonly used resin materials. For example, the resin may be made of a resin selected from polyethylene terephthalate, polycarbonate, and acrylic resin.

[0061] Here, in front of the wearer H, no other member extending between the pair of temple parts 21 is arranged. Thereby, when the wearer H is wearing glasses, it is possible to suppress interference between the glasses and the holding member 20. Also, since no other member extending between the pair of temple parts 21 is arranged in front of the wearer H, it is possible to suppress the holding member 20 from being conspicuous.

[0062] Also, when the face shield 10 is attached to a mannequin (a face mannequin manufactured by Daiichi Sankusangyo Co., Ltd.), in a front view, the ratio (A2 / A1) of the area A2 of the holding member 20 to the area A1 of the face of the mannequin is preferably 0.1% or more and 5% or less. Here, in order to hold the shield portion 30A in front of the wearer H, when the face shield 10 is attached to the mannequin, in a front view, it is preferable that the tip of the holding member 20 can be visually recognized without being concealed by the mannequin. In this case, in order to hold the shield portion 30A in front of the wearer H, the ratio can be 0.1% or more. Also, when the ratio is 5% or less, the holding member 20 can be made less conspicuous when the wearer H wears the face shield 10. Here, in the present embodiment, "front view" means that, in a state where the wearer H wears the face shield 10 such that a portion of the pair of temple portions 21 located in front of the ear-hanging portion 22 is horizontal, and the second protruding portion 27 abuts against the upper end of the second opening portion 82 described later (the state shown in FIG. 2), the face shield 10 is viewed from the normal direction of the third curved surface 77c of the shield portion 30A (transparent laminated film 30) at the horizontal central portion 77d (see FIG. 2) of the third curved surface 77c in the horizontal direction.

[0063] Also, as shown in FIG. 3A, the pair of temple parts 21 may extend parallel to each other in front of the earhook part 22. Thereby, it is possible to suppress the portion of the pair of temple parts 21 that is located in front of the earhook part 22 from coming into contact with the head (for example, the temple) of the wearer H. For this reason, it is possible to suppress the head of the wearer H from being clamped by the pair of temple parts 21. As a result, it is possible to suppress the wearer H from feeling discomfort, and the wearer H can wear the face shield 10 without feeling stress. Also, as shown in FIG. 3B, the pair of temple parts 21 may extend in such a manner that the distance between the pair of temple parts 21 increases as they go forward in front of the earhook part 22. Also in this case, it is possible to suppress the portion of the pair of temple parts 21 that is located in front of the earhook part 22 from coming into contact with the head (for example, the temple) of the wearer H.

[0064] Also, the force required to spread the respective temple parts 21 in a direction away from each other so that the distance between the tips of the respective temple parts 21 becomes 130 mm is preferably 0.01 N or more and 3.0 N or less. Thereby, it is possible to suppress the head of the wearer H from being clamped by the pair of temple parts 21. As a result, it is possible to suppress the wearer H from feeling discomfort, and the wearer H can wear the face shield 10 without feeling stress. In this case, the above force can be measured using a tensile testing machine (manufactured by A&D Company, Limited, MCT-2150 (product name)).

[0065] The weight of such a holding member 20 is preferably 20 g or less. Thereby, the wearer H can wear the face shield 10 without feeling stress.

[0066] (Shield part) Next, the shield portion 30A will be described. The shield portion 30A serves to prevent droplets such as saliva from a sneeze or cough of the wearer H from adhering to the face of others, and to prevent droplets such as saliva from a sneeze or cough of others from adhering to the face F of the wearer H. This shield portion 30A is composed of a transparent laminated film 30. In the present embodiment, the shield portion 30A covers the entire face F of the wearer H. Note that the shield portion 30A may cover only a part of the face F of the wearer H.

[0067] As shown in FIGS. 4 to 8, the transparent laminated film 30 constituting the shield portion 30A has a rectangular shape (see FIG. 8) having an upper side 71, a lower side 72 facing the upper side 71, and a pair of side sides 73 extending between the upper side 71 and the lower side 72.

[0068] A plurality of first cut portions 74a are formed in the lower side 72. In the present embodiment, three first cut portions 74a are formed, and each first cut portion 74a is formed by notching the transparent laminated film 30 in a V shape. Further, a through hole 78a that penetrates the transparent laminated film 30 in the thickness direction is formed at the tip of the V shape. Thereby, it is possible to suppress the transparent laminated film 30 from being broken due to the first cut portion 74a. Note that the shape of the first cut portion 74a is arbitrary. For example, the first cut portion 74a may be formed by cutting the transparent laminated film 30 linearly.

[0069] In addition, a first engaging portion 75a is formed on one side (the right side shown in FIG. 8) of the first cut portion 74a, and a first locking portion 76a for locking the first engaging portion 75a is formed on the other side (the left side shown in FIG. 8) of the first cut portion 74a. Among these, the first engaging portion 75a is formed on one side of each first cut portion 74a, and in the present embodiment, three first engaging portions 75a are formed. In the illustrated example, each first engaging portion 75a is formed by a protruding piece provided so as to protrude from the lower side 72 toward the upper side 71.

[0070] The first locking part 76a is formed on the other side of each first cut part 74a. In the present embodiment, three first locking parts 76a are formed. In the illustrated example, each first locking part 76a is formed by a through hole that penetrates the transparent laminated film 30 in the thickness direction, and the through holes constituting the first locking part 76a each have a rectangular shape. However, the present invention is not limited to this, and the through holes constituting the first locking part 76a may have any shape such as a circular shape, an elliptical shape, or a polygonal shape with rounded corners.

[0071] Then, by locking the first engaging part 75a to the first locking part 76a, a first curved surface 77a (see FIGS. 4, 5, and 7) that curves so as to protrude toward the side away from the wearer H is formed in the vicinity of the lower side 72. As a result, the droplets scattered downward adhere to the first curved surface 77a. Therefore, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the droplets scattered downward from adhering to the surrounding structures.

[0072] Further, since the first curved surface 77a curves so as to protrude toward the side away from the wearer H, the region where the first curved surface 77a is formed is easily elastically deformed when an impact is applied to the region. Therefore, even when the face shield 10 is dropped, the region where the first curved surface 77a is formed elastically deforms, so that the region can absorb the impact of the fall. Therefore, it is possible to suppress the face shield 10 from being damaged.

[0073] This first curved surface 77a may be a three-dimensional curved surface. In the present specification, the "three-dimensional curved surface" means a surface that is partially or entirely curved around each of a plurality of non-parallel axes. For example, the first curved surface 77a may be entirely curved so that its vertical cross-sectional shape protrudes toward the side away from the wearer H at any position, or may be curved so that its horizontal cross-sectional shape protrudes toward the side away from the wearer H at any position.

[0074] In addition, in the present embodiment, a plurality of second cut portions 74b are formed in the upper side 71. In the present embodiment, three second cut portions 74b are formed, and each second cut portion 74b is formed by notching the transparent laminated film 30 in a V shape. Further, a through hole 78b is formed at the tip of the V shape. Thereby, it is possible to suppress the transparent laminated film 30 from being broken starting from the second cut portion 74b. Note that the shape of the second cut portion 74b is arbitrary. For example, the second cut portion 74b may be formed by cutting the transparent laminated film 30 linearly.

[0075] Also, a second engaging portion 75b is formed on one side (the left side shown in FIG. 8) of the second cut portion 74b, and a second locking portion 76b for locking the second engaging portion 75b is formed on the other side (the right side shown in FIG. 8) of the second cut portion 74b. Among these, the second engaging portion 75b is formed on one side of each second cut portion 74b, and in the present embodiment, three second engaging portions 75b are formed. In the illustrated example, each second engaging portion 75b is formed by a protruding piece provided so as to protrude toward the side from the upper side 71 to the lower side 72.

[0076] The second locking portion 76b is formed on the other side of each second cut portion 74b, and in the present embodiment, three second locking portions 76b are formed. In the illustrated example, each second locking portion 76b is formed by a through hole that penetrates the transparent laminated film 30 in the thickness direction, and the through holes constituting the second locking portion 76b each have a rectangular shape. However, it is not limited to this, and the through holes constituting the second locking portion 76b may have any shape such as a circular shape, an elliptical shape, or a polygonal shape with rounded corners.

[0077] Then, by locking the second engaging portion 75b to the second locking portion 76b, a second curved surface 77b (see FIGS. 4, 6, and 7) that curves convexly away from the wearer H is formed in the vicinity of the upper side 71. As a result, the droplets scattered upward adhere to the second curved surface 77b. Therefore, it is possible to suppress the droplets from scattering around from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Further, by forming the second curved surface 77b in the vicinity of the upper side 71, the second curved surface 77b can also cover the head of the wearer H, and it is possible to effectively protect the wearer H from droplets scattered from the outside.

[0078] This second curved surface 77b may be a three-dimensional curved surface. For example, the second curved surface 77b may be curved as a whole such that its vertical cross-sectional shape is convex away from the wearer H at any position, and its horizontal cross-sectional shape may be curved such that it is convex away from the wearer H at any position.

[0079] Also, by locking the first engaging portion 75a to the first locking portion 76a and locking the second engaging portion 75b to the second locking portion 76b, a third curved surface 77c that curves convexly away from the wearer H is formed between the first curved surface 77a and the second curved surface 77b. As a result, the droplets scattered in the direction facing the wearer and in the left-right direction as seen from the wearer adhere to the third curved surface 77c. Therefore, it is possible to suppress the droplets from scattering around from the side of the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures.

[0080] As shown in FIG. 7, the third curved surface 77c has a linear shape in a vertical cross-section. Thereby, it is possible to suppress the size of the face shield 10 (especially the size in the front-rear direction) from becoming too large. For this reason, when the wearer H moves their head or the like, it is possible to suppress the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or other people. Further, since it is possible to suppress the size of the face shield 10 from becoming too large, even when the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

[0081] The third curved surface 77c may be a two-dimensional curved surface. In this specification, the "two-dimensional curved surface" means a curved surface that is curved two-dimensionally around a single axis, or a curved surface that is curved two-dimensionally with the same or different curvatures around a plurality of mutually parallel axes. For example, the vertical cross-sectional shape of the third curved surface 77c may be linear at any position, and the horizontal cross-sectional shape may be curved so as to be convex on the side away from the wearer H at any position.

[0082] Further, as shown in FIGS. 4, 7, and 8, an opening 80 into which the attachment portion 25 is inserted is formed in the transparent laminated film 30. In this case, the openings 80 are formed in the vicinity of the pair of side edges 73, respectively.

[0083] Each opening 80 includes a first opening 81 into which the first protruding portion 26 is inserted and a second opening 82 into which the second protruding portion 27 is inserted. In the illustrated example, each opening 80 includes two first openings 81 and two second openings 82, respectively. In this case, for example, by changing the first opening 81 into which the first protruding portion 26 is inserted, the curvatures of the first curved surface 77a, the second curved surface 77b, and the third curved surface 77c of the shield portion 30A can be easily changed.

[0084] Each first opening 81 penetrates the transparent laminated film 30 in the thickness direction. Also, each first opening 81 has a shape corresponding to the first protrusion 26. In the present embodiment, the first opening 81 has a circular shape with a diameter slightly larger than the diameter of the rod-shaped member constituting the first protrusion 26.

[0085] Each second opening 82 penetrates the transparent laminated film 30 in the thickness direction. Also, each second opening 82 has a rectangular shape extending along the vertical direction. In the present embodiment, the height of the second opening 82 is higher than the height of the second protrusion 27, and as described above, a clearance is provided between the second protrusion 27 and the second opening 82. In the illustrated example, in one opening 80, the shapes of the respective second openings 82 are different from each other. That is, in one opening 80, the height of one second opening 82 is higher than the height of the other second opening 82. However, the present invention is not limited to this, and in one opening 80, the shapes of the respective second openings 82 may be equal to each other.

[0086] This opening 80 is formed in the region where the third curved surface 77c is formed. And as described above, the third curved surface 77c is curved so as to be convex on the side away from the wearer H. For this reason, by inserting the pair of attachment portions 25 into the opening 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the above-described holding member 20 can easily hold the transparent laminated film 30.

[0087] Transparent laminated film with protective film Next, the transparent laminated film 60 with a protective film will be described. FIGS. 9A to 9D show an example of the layer configuration of the transparent laminated film 60 with a protective film. As shown in FIGS. 9A to 9D, the transparent laminated film 60 with a protective film includes the transparent laminated film 30 according to the present embodiment, a surface protective film 61 that protects the surface 301 of the transparent laminated film 30, and a back surface protective film 62 that protects the back surface 302 of the transparent laminated film 30.

[0088] Among these, the front surface protection film 61 and the back surface protection film 62 each play a role in suppressing damage to the front surface 301 and the back surface 302 of the transparent laminated film 30, and also in suppressing contamination of the front surface 301 and the back surface 302 by foreign substances or the like. The front surface protection film 61 and the back surface protection film 62 are each detachably attached to the transparent laminated film 30. The front surface protection film 61 and the back surface protection film 62 each include an adhesive layer (not shown), and may be attached to the transparent laminated film 30 by this adhesive layer. Note that the adhesive force of the adhesive layer may be, for example, about 0.05 N / 25 mm or more and 5 N / 25 mm or less. Also, when using the face shield 10 described above, the front surface protection film 61 and the back surface protection film 62 are each peeled off from the transparent laminated film 30. The materials of the front surface protection film 61 and the back surface protection film 62 may be, for example, films made of polyolefins such as polyester resin, polyethylene, or polypropylene.

[0089] Transparent laminated film Next, the transparent laminated film 30 according to the present embodiment will be described. As described above, the transparent laminated film 30 may be used for the face shield 10 that protects the face F of the wearer H. As shown in FIGS. 9A to 9D, the transparent laminated film 30 includes a front surface antireflection layer 40 that constitutes the front surface 301 and a back surface antireflection layer 50 that constitutes the back surface 302. Also, as shown in FIGS. 9A and 9B, the transparent laminated film 30 may further include a transparent adhesive layer 31 that adheres the front surface antireflection layer 40 and the back surface antireflection layer 50.

[0090] Specifically, as shown in FIGS. 9A and 9B, the transparent laminated film 30 includes the front surface antireflection layer 40, the transparent adhesive layer 31, and the back surface antireflection layer 50 in this order from the front surface 301 toward the back surface 302. In this case, in the transparent laminated film 30, the front surface antireflection layer 40 is exposed outward from the front surface 301 side. Also, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

[0091] Also, in the examples shown in FIGS. 9A and 9B, the front surface antireflection layer 40 has a front surface antireflection functional layer 41 and a front surface transparent base material layer 42 that are arranged in order from the front surface 301 toward the back surface 302. Further, the front surface antireflection functional layer 41 includes a front surface refractive layer 43 and a front surface hard coat layer 44 that are arranged in order from the front surface 301 toward the back surface 302. Furthermore, the front surface refractive layer 43 includes a front surface low refractive index layer 45 and a front surface high refractive index layer 46 that are arranged in order from the front surface 301 toward the back surface 302. Here, as shown in FIG. 9B, the front surface high refractive index layer 46 may include a first front surface high refractive index layer 47 and a second front surface high refractive index layer 48 that are arranged in order from the front surface 301 toward the back surface 302.

[0092] Also, in the examples shown in FIGS. 9A and 9B, the back surface antireflection layer 50 has a back surface antireflection functional layer 51 and a back surface transparent base material layer 52 that are arranged in order from the back surface 302 toward the front surface 301. Further, the back surface antireflection functional layer 51 includes a back surface refractive layer 53 and a back surface hard coat layer 54 that are arranged in order from the back surface 302 toward the front surface 301. Furthermore, the back surface refractive layer 53 includes a back surface low refractive index layer 55 and a back surface high refractive index layer 56 that are arranged in order from the back surface 302 toward the front surface 301. Here, as shown in FIG. 9B, the back surface high refractive index layer 56 may include a first back surface high refractive index layer 57 and a second back surface high refractive index layer 58 that are arranged in order from the back surface 302 toward the front surface 301.

[0093] Furthermore, as shown in FIGS. 9C and 9D, the transparent laminated film 30 may further include a core layer 32 positioned between the front surface antireflection layer 40 and the back surface antireflection layer 50. In this case, the transparent laminated film 30 may further include a first transparent adhesive layer 31a that adheres the front surface antireflection layer 40 and the core layer 32, and a second transparent adhesive layer 31b that adheres the core layer 32 and the back surface antireflection layer 50.

[0094] Specifically, as shown in FIGS. 9C and 9D, the transparent laminated film 30 includes, in order from the front surface 301 to the back surface 302, a front surface antireflection layer 40, a first transparent adhesive layer 31a, a core layer 32, a second transparent adhesive layer 31b, and a back surface antireflection layer 50. Also in this case, in the transparent laminated film 30, the front surface antireflection layer 40 is exposed outward from the front surface 301 side. Further, in the transparent laminated film 30, the back surface antireflection layer 50 is exposed outward from the back surface 302 side.

[0095] Also, in the examples shown in FIGS. 9C and 9D, the front surface antireflection layer 40 has a front surface antireflection functional layer 41 and a front surface transparent base material layer 42, which are arranged in order from the front surface 301 to the back surface 302. Further, the front surface antireflection functional layer 41 includes a front surface refractive layer 43 and a front surface hard coat layer 44, which are arranged in order from the front surface 301 to the back surface 302. Furthermore, the front surface refractive layer 43 includes a front surface low refractive index layer 45 and a front surface high refractive index layer 46, which are arranged in order from the front surface 301 to the back surface 302. Here, as shown in FIG. 9D, the front surface high refractive index layer 46 may include a first front surface high refractive index layer 47 and a second front surface high refractive index layer 48, which are arranged in order from the front surface 301 to the back surface 302.

[0096] Also, in the examples shown in FIGS. 9C and 9D, the back surface antireflection layer 50 has a back surface antireflection functional layer 51 and a back surface transparent base material layer 52, which are arranged in order from the back surface 302 to the front surface 301. Further, the back surface antireflection functional layer 51 includes a back surface refractive layer 53 and a back surface hard coat layer 54, which are arranged in order from the back surface 302 to the front surface 301. Furthermore, the back surface refractive layer 53 includes a back surface low refractive index layer 55 and a back surface high refractive index layer 56, which are arranged in order from the back surface 302 to the front surface 301. Here, as shown in FIG. 9D, the back surface high refractive index layer 56 may include a first back surface high refractive index layer 57 and a second back surface high refractive index layer 58, which are arranged in order from the back surface 302 to the front surface 301.

[0097] As described above, the front anti-reflection layer 40 has a basic structure having a front high refractive index layer 46 and a front low refractive index layer 45 on the front transparent base material layer 42. Also, as described above, the back anti-reflection layer 50 has a basic structure having a back high refractive index layer 56 and a back low refractive index layer 55 on the back transparent base material layer 52. The front high refractive index layer 46 (back high refractive index layer 56) and the front low refractive index layer 45 (back low refractive index layer 55) play a role of imparting an anti-reflection function by an optical interference function.

[0098] The front anti-reflection layer 40 (back anti-reflection layer 50) may further be provided with a middle refractive index layer or the like to impart an anti-reflection function by an optical interference function of three or more layers. However, if the structure is too multilayered, it is not preferable from the viewpoint of cost effectiveness. Therefore, the front anti-reflection layer 40 (back anti-reflection layer 50) according to the present embodiment preferably has a configuration in which an anti-reflection function by an optical interference function is imparted by two layers of the front high refractive index layer 46 (back high refractive index layer 56) and the front low refractive index layer 45 (back low refractive index layer 55). Note that the front anti-reflection layer 40 (back anti-reflection layer 50) may convert the front hard coat layer 44 (back hard coat layer 54) into a middle refractive index layer, and impart an anti-reflection function by an optical interference function with three layers of the middle refractive index layer, the high refractive index layer, and the low refractive index layer.

[0099] Hereinafter, each layer of the transparent laminated film 30 will be described.

[0100] <Front anti-reflection layer and back anti-reflection layer> The front anti-reflection layer 40 is a layer for suppressing the reflection of light incident from the front surface 301 side of the transparent laminated film 30. By providing the transparent laminated film 30 with the front anti-reflection layer 40, the reflection of light on the front surface 301 of the transparent laminated film 30 can be suppressed. Thereby, for example, when the wearer H wearing the face shield 10 is visually recognized, the visibility of the face F of the wearer H can be improved. For this reason, the visibility of the mouth area of the wearer H can be improved, and smooth communication between the wearer H and others can be achieved.

[0101] On the other hand, the back surface antireflection layer 50 is a layer for suppressing the reflection of light incident from the back surface 302 side of the transparent laminated film 30. By providing the transparent laminated film 30 with the back surface antireflection layer 50, the reflection of light on the back surface 302 of the transparent laminated film 30 can be suppressed. Thereby, for example, it is possible to prevent the wearer H wearing the face shield 10 from feeling discomfort or fatigue due to the light reflected on the back surface 302 of the transparent laminated film 30.

[0102] As described above, the front surface antireflection layer 40 has a front surface antireflection functional layer 41 and a front surface transparent base material layer 42. Also, as described above, the back surface antireflection layer 50 has a back surface antireflection functional layer 51 and a back surface transparent base material layer 52. Here, first, the front surface transparent base material layer 42 and the back surface transparent base material layer 52 will be described.

[0103] [Front surface transparent base material layer and back surface transparent base material layer] The front surface transparent base material layer 42 and the back surface transparent base material layer 52 are layers for supporting, for example, the front surface antireflection functional layer 41 and the back surface antireflection functional layer 51, and for increasing the overall strength of the front surface antireflection layer 40 and the back surface antireflection layer 50. The materials of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 are not particularly limited as long as they are transparent materials used as the base material of a general film, but from the viewpoints of material cost, productivity, etc., preferably a plastic film, a plastic sheet, etc. can be appropriately selected according to the application.

[0104] Examples of materials for the plastic film or plastic sheet include materials made of various synthetic resins. Examples of synthetic resins include cellulose resins such as triacetyl cellulose resin (TAC), diacetyl cellulose, acetate butyrate cellulose, and cellophane; polyester resins such as polyethylene terephthalate resin (PET), polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, and polyester-based 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-based thermoplastic elastomer, or mixtures thereof; acrylic resins such as poly(meth)acrylic acid methyl resin, poly(meth)acrylic acid ethyl resin, and poly(meth)acrylic acid butyl resin; polyamide resins represented by nylon 6 or nylon 66; polystyrene resin; polycarbonate resin; polyarylate resin; or polyimide resin, etc. are preferably mentioned. Further, the materials for the front surface transparent base material layer 42 and the back surface transparent base material layer 52 may be cycloolefin polymer (COP)-based resins or cycloolefin copolymer (COC)-based resins.

[0105] As the front surface transparent base material layer 42 and the back surface transparent base material layer 52, they can be used alone or selected from two or more of the above-mentioned plastic films and plastic sheets as a mixture. However, from the viewpoints of flexibility, toughness, transparency, etc., as the materials for the front surface transparent base material layer 42 and the back surface transparent base material layer 52, cellulose resins and polyester resins are more preferable. Further, from the viewpoints of flexibility, toughness, transparency, etc., it is preferable that the front surface transparent base material layer 42 and the back surface transparent base material layer 52 contain triacetyl cellulose and polyethylene terephthalate.

[0106] There are no particular restrictions on the thicknesses of the front surface transparent base material layer 42 and the back surface transparent base material layer 52, and they are appropriately selected according to the application. The thicknesses of the front surface transparent base material layer 42 and the back surface transparent base material layer 52 may each be about 5 μm or more and 130 μm or less, and preferably 10 μm or more and 100 μm or less in consideration of durability, handleability, etc. The thickness of each layer can be calculated from the average value of the thicknesses at 20 locations from an image of a cross-section taken using, for example, a scanning electron microscope (SEM), a transmission electron microscope (TEM), or a scanning transmission electron microscope (STEM). 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 TEM or a STEM. In the case of an SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and the magnification is preferably 1000 times or more and 7000 times or less. In the case of a TEM or a STEM, the acceleration voltage is preferably 10 kV or more and 30 kV or less, and the magnification is preferably 50,000 times or more and 300,000 times or less. Note that for each of the layers described below, the film thickness of each layer can be measured by the same method as the film thicknesses of the front surface transparent base material layer 42 and the back surface transparent base material layer 52.

[0107] [Front surface antireflection functional layer and back surface antireflection functional layer] Next, the front surface antireflection functional layer 41 and the back surface antireflection functional layer 51 will be described. The front surface antireflection functional layer 41 and the back surface antireflection functional layer 51 each play a role of imparting a function of suppressing light reflection to the front surface antireflection layer 40 and the back surface antireflection layer 50, respectively.

[0108] Further, the front surface antireflection functional layer 41 may be a coating layer coated on the front surface transparent base material layer 42, and the back surface antireflection functional layer 51 may be a coating layer coated on the back surface transparent base material layer 52. In this way, since the front surface antireflection functional layer 41 and the back surface antireflection functional layer 51 are coating layers, the thicknesses of the front surface antireflection functional layer 41 and the back surface antireflection 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.

[0109] The front surface antireflection functional layer 41 and the back surface antireflection functional layer 51 are each preferably made of a cured product containing an acrylic monomer. Thereby, the front surface antireflection functional layer 41 and the back surface antireflection functional layer 51 with high uniformity can be formed even by short-time processing.

[0110] Here, as described above, the front surface antireflection functional layer 41 includes a front surface refractive layer 43 and a front surface hard coat layer 44. Further, as described above, the back surface antireflection functional layer 51 includes a back surface refractive layer 53 and a back surface hard coat layer 54. The front surface hard coat layer 44 may be a coating layer coated on the front surface transparent base material layer 42, and the front surface refractive layer 43 may be a coating layer coated on the front surface hard coat layer 44. Also, the back surface hard coat layer 54 may be a coating layer coated on the back surface transparent base material layer 52, and the back surface refractive layer 53 may be a coating layer coated on the back surface hard coat layer 54. Thus, since the front surface refractive layer 43, the front surface hard coat layer 44, the back surface refractive layer 53, and the back surface hard coat layer 54 are coating layers, the thickness of each layer can be easily controlled, and desired functions such as the light reflectance, total light transmittance, and in some cases, the color tone of the transparent laminated film 30 can be easily controlled.

[0111] Next, the front surface hard coat layer 44 and the back surface hard coat layer 54 will be described.

[0112] {Front Surface Hard Coat Layer and Back Surface Hard Coat Layer} The front surface hard coat layer 44 and the back surface hard coat layer 54 serve to improve the scratch resistance of the front surface antireflection layer 40 and the back surface antireflection layer 50. Here, the hard coat refers to the property of showing a hardness of "H" or higher in the pencil hardness test defined in JIS K5600-5-4:1999. The front surface hard coat layer 44 and the back surface hard coat layer 54 can be formed, for example, from a hard coat layer coating liquid containing a curable resin composition. Examples of the curable resin composition include a thermosetting resin composition or an ionizing radiation curable resin composition, and from the viewpoint of scratch resistance, the ionizing radiation curable resin composition is preferred.

[0113] A thermosetting resin composition is a composition containing at least a thermosetting resin and is a resin composition that cures upon heating. Examples of the thermosetting resin include acrylic resins, urethane resins, phenolic resins, urea melamine resins, epoxy resins, unsaturated polyester resins, silicone resins, and the like. A curing agent is added to these curable resins as necessary to the thermosetting resin composition.

[0114] A radiation-curable resin composition is a composition containing a compound having a radiation-curable functional group (hereinafter also referred to as a "radiation-curable compound"). Examples of the radiation-curable functional group include ethylenically unsaturated bond groups such as (meth)acryloyl groups, vinyl groups, and allyl groups, and epoxy groups and oxetanyl groups. As the radiation-curable compound, a compound having an ethylenically unsaturated bond group is preferred, a compound having two or more ethylenically unsaturated bond groups is more preferred, and among them, a polyfunctional (meth)acrylate-based compound having two or more ethylenically unsaturated bond groups is even more preferred. As the polyfunctional (meth)acrylate-based compound, either a monomer or an oligomer can be used. The term "ionizing radiation" means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or crosslinking molecules among electromagnetic waves or charged particle beams, and usually ultraviolet rays (UV) or electron beams (EB) are used, but other electromagnetic waves such as X-rays and γ-rays and charged particle beams such as α-rays and ion beams can also be used.

[0115] Among polyfunctional (meth)acrylate compounds, examples of bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, 1,6-hexanediol diacrylate, and the like. Examples of trifunctional or higher (meth)acrylate monomers include trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra(meth)acrylate, isocyanuric acid-modified tri(meth)acrylate, and the like. Further, the above (meth)acrylate monomers may be monomers in which a part of the molecular skeleton is modified, and may also be monomers modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like.

[0116] Examples of polyfunctional (meth)acrylate oligomers include acrylate-based polymers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, and polyether (meth)acrylate. Urethane (meth)acrylate is obtained, for example, by the reaction of a polyhydric alcohol, an organic diisocyanate, and hydroxy (meth)acrylate. Preferred epoxy (meth)acrylates are (meth)acrylates obtained by reacting an aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like having a functionality of 3 or more with (meth)acrylic acid, (meth)acrylates obtained by reacting an aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like having a functionality of 2 or more with a polybasic acid and (meth)acrylic acid, and (meth)acrylates obtained by reacting an aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like having a functionality of 2 or more with phenols and (meth)acrylic acid. The above radiation-curable compounds can be used alone or in combination of two or more.

[0117] When the radiation-curable compound is an ultraviolet-curable compound, the radiation-curable composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator. Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyl methyl ketal, benzoyl benzoate, α-acyl oxime ester, thioxanthones, and the like. 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 the sublimation of the photopolymerization initiator remaining due to the heat during the formation of the transparent conductive film or the crystallization process, which may impair the reduction of the resistance of the transparent conductive film. The same applies when using a photopolymerization initiator in the high refractive index layer and the low refractive index layer described later. The photopolymerization accelerator is a material that can reduce the polymerization inhibition by air during curing and increase the curing rate. Examples thereof include one or more selected from isoamyl p-dimethylaminobenzoate, ethyl p-dimethylaminobenzoate, and the like.

[0118] The thicknesses of the front surface hard coat layer 44 and the back surface hard coat layer 54 are each preferably in the range of 0.1 μm or more and 100 μm or less, and more preferably in the range of 0.8 μm or more and 20 μm or less. When the thicknesses of the front surface hard coat layer 44 and the back surface hard coat layer 54 are each within the above ranges, sufficient hard coat performance can be obtained, and cracking and the like do not occur due to external impact, making it less likely to break.

[0119] The refractive indices of the front hard coat layer 44 and the back hard coat layer 54 are preferably smaller than those of the front high refractive index layer 46 and the back high refractive index layer 56, more preferably 1.45 or more and 1.70 or less, and even more preferably 1.45 or more and 1.60 or less. If the refractive indices of the front hard coat layer 44 and the back hard coat layer 54 are within such a range, the front hard coat layer 44 and the back hard coat layer 54 each have a role as a medium refractive index layer. Thereby, an interference effect by the three layers of the front hard coat layer 44, the front high refractive index layer 46, and the front low refractive index layer 45, and an interference effect by the three layers of the back hard coat layer 54, the back high refractive index layer 56, and the back low refractive index layer 55 become possible. For this reason, light reflection can be effectively suppressed. Also, from the viewpoint of suppressing interference fringes, it is preferable to reduce the difference between the refractive indices of the front hard coat layer 44 and the back hard coat layer 54 and the refractive indices of the front transparent base material layer 42 and the back transparent base material layer 52.

[0120] As means for imparting the role as a medium refractive index layer to the front hard coat layer 44 and the back hard coat layer 54, there are mentioned a means of blending a resin having a high refractive index into the hard coat layer coating liquid, and a means of blending particles having a high refractive index. When blending particles having a high refractive index, whitening or coating defects due to aggregation of the particles may occur, and thus the former means (blending a resin having a high refractive index) is preferable. Examples of the resin having a high refractive index include resins in which a group containing sulfur, phosphorus, bromine, an aromatic ring, etc. is introduced into the above-described thermosetting resin or radiation curable compound. As the particles having a high refractive index, the same particles as the high refractive index particles used for the front high refractive index layer 46 and the back high refractive index layer 56 described later can be used.

[0121] The refractive indices of each layer such as the front hard coat layer 44 and the back hard coat layer 54 can be calculated, for example, by fitting between the reflection spectrum measured by a reflection photometer and the reflection spectrum calculated from the optical model of the multilayer thin film using the Fresnel coefficient.

[0122] The front hard coat layer 44 and the back hard coat layer 54 can be formed by preparing a coating liquid for forming a hard coat layer with the above-described curable resin composition, additives such as an ultraviolet absorber and a leveling agent blended as required, and a diluting solvent, applying the coating liquid onto a transparent substrate by a conventionally known coating method, drying, and irradiating with ionizing radiation for curing as required.

[0123] {Front refractive layer and back refractive layer} Next, the front refractive layer 43 and the back refractive layer 53 will be described. The front refractive layer 43 and the back refractive layer 53 serve to reduce the light reflectance of the front antireflection layer 40 and the back antireflection layer 50. As described above, the front refractive layer 43 includes a front low refractive index layer 45 and a front high refractive index layer 46. Also, as described above, the back refractive layer 53 includes a back low refractive index layer 55 and a back high refractive index layer 56. Here, first, the front low refractive index layer 45 and the back low refractive index layer 55 will be described.

[0124] (Front low refractive index layer and back low refractive index layer) The front low refractive index layer 45 and the rear low refractive index layer 55 are layers provided on the front high refractive index layer 46 and the rear high refractive index layer 56, and they play a role in reducing the light reflectance of the front antireflection layer 40 and the rear antireflection layer 50 by an interference effect using the difference in refractive index from the front high refractive index layer 46 and the rear high refractive index layer 56. The front low refractive index layer 45 and the rear low refractive index layer 55 preferably have a refractive index of 1.26 or more and 1.40 or less, more preferably 1.28 or more and 1.38 or less, and even more preferably 1.30 or more and 1.32 or less in order to make the front antireflection layer 40 and the rear antireflection layer 50 have an ultra-low reflectance. The lower the refractive index of the front low refractive index layer 45 and the rear low refractive index layer 55, the lower the refractive index of the front antireflection layer 40 and the rear antireflection layer 50 can be without increasing the refractive index of the front high refractive index layer 46 and the rear high refractive index layer 56 so much. On the other hand, if the refractive index of the front low refractive index layer 45 and the rear low refractive index layer 55 is made too low, the strength of the front low refractive index layer 45 and the rear low refractive index layer 55 tends to decrease. Therefore, by setting the refractive index of the front low refractive index layer 45 and the rear low refractive index layer 55 within the above ranges respectively, while maintaining the strength of the front low refractive index layer 45 and the rear low refractive index layer 55, the addition amount of the high refractive index particles described below in the front high refractive index layer 46 and the rear high refractive index layer 56 can be suppressed, which is preferable in terms of suppressing color tone and whitening. Also, the thickness of the front low refractive index layer 45 and the rear low refractive index layer 55 is preferably 80 nm or more and 120 nm respectively, more preferably 85 nm or more and 110 nm, and even more preferably 90 nm or more and 105 nm. Also, the front low refractive index layer 45 and the rear low refractive index layer 55 may each be formed from a plurality of layers satisfying the above refractive index range, but from the viewpoint of cost effectiveness, 2 layers or less are preferable, and a single layer is more preferable.

[0125] As a method for forming the front low refractive index layer 45 and the back low refractive index layer 55, it can be roughly classified into a wet method and a dry method. Examples of the wet method include a method of forming by a sol-gel method using a metal alkoxide or the like, a method of forming by coating a resin having a low refractive index such as a fluororesin, and a method of forming by coating a coating liquid for forming a low refractive index layer containing low refractive index particles in a resin composition. Examples of the dry method include a method of selecting particles having a desired refractive index from the low refractive index particles described later and forming them by a physical vapor deposition method or a chemical vapor deposition method. The wet method is excellent in terms of production efficiency. In the present embodiment, among the wet methods, it is preferable to form by a coating liquid for forming a low refractive index layer containing low refractive index particles in a resin composition.

[0126] The low refractive index particles are preferably used for the purpose of reducing their refractive index, that is, improving the antireflection property, and can be used without limitation regardless of whether they are inorganic or organic such as silica or magnesium fluoride. However, from the viewpoint of further improving the antireflection property and ensuring good surface hardness, particles having a structure with voids themselves are preferably used.

[0127] Particles having a structure with voids within themselves have fine voids inside and are filled with a gas such as air with a refractive index of 1.0, so they are particles with a low refractive index themselves. Examples of such particles having voids include inorganic or organic porous particles, hollow particles, etc. For example, porous silica, hollow silica particles, or porous polymer particles and hollow polymer particles made of acrylic resin, etc. are mentioned. As inorganic particles, silica particles having voids prepared using the technology disclosed in JP-A-2001-233611 are mentioned as a preferable example. Also, as organic particles, hollow polymer particles prepared using the technology disclosed in JP-A-2002-80503 are mentioned as a preferable example. Silica or porous silica having voids as described above has a refractive index in the range of 1.18 or more and 1.44 or less, and since the refractive index is lower than that of general silica particles with a refractive index of about 1.45, it is preferable from the viewpoint of reducing the refractive index of the front surface low refractive index layer 45 and the back surface low refractive index layer 55.

[0128] Hollow silica particles are particles having a function of reducing their refractive index while maintaining the coating film strength of the front surface low refractive index layer 45 and the back surface low refractive index layer 55. The hollow silica particles used in the present embodiment are silica particles having a structure with a cavity inside. Hollow silica particles are silica particles whose refractive index decreases in inverse proportion to the occupancy rate of the internal cavity compared to the original refractive index of silica particles (refractive index n = about 1.45). For this reason, the refractive index of the entire hollow silica particles is 1.18 or more and 1.44 or less.

[0129] The hollow silica particles are not particularly limited. For example, they are particles having an outer shell and having a porous or hollow interior, and include silica particles prepared using the technologies disclosed in JP-A-6-330606, JP-A-7-013137, JP-A-7-133105, and JP-A-2001-233611.

[0130] The average particle diameter of the primary particles of the low refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and even more preferably 10 nm or more and 80 nm or less. If the average particle diameter of the primary particles is within the above range, the transparency of the surface low refractive index layer 45 and the back surface low refractive index layer 55 is not impaired, and a good particle dispersion state can be obtained. In particular, when hollow particles are used as the low refractive index particles, particles having an average particle diameter of 70 nm or more and 80 nm or less can increase the porosity while maintaining the thickness of the outer shell that does not cause insufficient strength, thereby reducing the refractive index, and are suitable in that they are also excellent in balance with the ideal thickness (about 100 nm) of the surface low refractive index layer 45 and the back surface low refractive index layer 55 for reducing the reflectance.

[0131] The low refractive index particles used in the present embodiment 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 preferably performed. By subjecting the low refractive index particles to surface treatment, the affinity with the binder resin described later is improved, the dispersion of the particles becomes uniform, and aggregation between the particles is less likely to occur. Therefore, a decrease in the transparency of the surface low refractive index layer 45 and the back surface low refractive index layer 55 due to enlargement of particles caused by aggregation, a decrease in the coatability of the composition for layer formation, and a decrease in the coating film strength of the composition are suppressed.

[0132] In addition, when the silane coupling agent has a (meth)acryloyl group, since the silane coupling agent has radiation curability, it easily reacts with the binder resin described later. Therefore, in the coating film of the layer-forming composition, the low refractive index particles are well fixed to the binder resin. That is, the low refractive index particles function as a crosslinking agent in the binder resin. As a result, a tightening effect of the entire coating film is obtained, and it is possible to impart excellent surface hardness to the front low refractive index layer 45 and the back low refractive index layer 55 while leaving the flexibility inherent to the binder resin. Therefore, since the front low refractive index layer 45 and the back low refractive index layer 55 deform by taking advantage of their own flexibility, they have an absorption force and a restoring force against external impacts, so the occurrence of scratches is suppressed, and a layer having high surface hardness with excellent scratch resistance is obtained.

[0133] Examples of the silane coupling agent preferably used in the surface treatment of the low refractive index particles include 3-(meth)acryloxypropyltrimethoxysilane, 3-(meth)acryloxypropyltriethoxysilane, 3-(meth)acryloxypropylmethyldimethoxysilane, 3-(meth)acryloxypropylmethyldiethoxysilane, 2-(meth)acryloxypropyltrimethoxysilane, 2-(meth)acryloxypropyltriethoxysilane, and the like.

[0134] The content of the low refractive index particles in the front low refractive index layer 45 and the back 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 with respect to 100 parts by mass of the resin of the front low refractive index layer 45 and the back low refractive index layer 55, respectively. When the content of the low refractive index particles is within the above range, good antireflection characteristics and surface hardness can be obtained. In addition, the ratio of the hollow particles and / or porous particles in all the low refractive index particles contained in the front low refractive index layer 45 and the back 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.

[0135] Examples of the resin composition contained in the coating liquid for layer formation include curable resin compositions. As the curable resin composition, the same materials as those exemplified in the description of the surface hard coat layer 44 and the back hard coat layer 54 can be used, and an ionizing radiation curable resin composition is preferable. Further, as the resin composition, a fluorine-containing polymer or a fluorine monomer that itself exhibits low refractive index properties is also preferably used. The fluorine-containing polymer is a polymer of a polymerizable compound containing at least a fluorine atom in the molecule, and is suitable in that it can impart antifouling properties and slipperiness. The fluorine-containing polymer is preferably a polymer having a reactive group in the molecule and functioning as a curable resin composition, and more preferably a polymer having an ionizing radiation curable reactive group and functioning as an ionizing radiation curable resin composition.

[0136] The fluorine-containing polymer is preferably a polymer containing silicon together with fluorine in order to not only repel dirt on the surface of the low refractive index layer but also impart wipe-off properties for the repelled dirt. For example, a silicone-containing vinylidene fluoride copolymer in which a silicone component is contained in a copolymer is preferably mentioned. Examples of the silicone component in this case include (poly)dimethylsiloxane, (poly)diethylsiloxane, (poly)diphenylsiloxane, (poly)methylphenylsiloxane, alkyl-modified (poly)dimethylsiloxane, azo group-containing (poly)dimethylsiloxane, dimethylsilicone, phenylmethylsilicone, alkyl·aralkyl-modified silicone, fluorosilicone, polyether-modified silicone, fatty acid ester-modified silicone, methylhydrogen silicone, silanol group-containing silicone, alkoxy group-containing silicone, phenol group-containing silicone, methacryl-modified silicone, acryl-modified silicone, amino-modified silicone, carboxylic acid-modified silicone, carbinol-modified silicone, epoxy-modified silicone, mercapto-modified silicone, fluorine-modified silicone, polyether-modified silicone, etc. Among them, as the silicone component, a component having a dimethylsiloxane structure is preferable.

[0137] The front low refractive index layer 45 and the back low refractive index layer 55 can be formed by, for example, preparing a coating liquid for layer formation with low refractive index particles, a resin composition, additives such as an ultraviolet absorber and a leveling agent blended as required, and a diluting solvent, and applying the coating liquid onto the front high refractive index layer 46 or the back high refractive index layer 56 by a conventionally known coating method, drying, and irradiating with ionizing radiation for curing as required.

[0138] (Front high refractive index layer and back high refractive index layer) The front high refractive index layer 46 and the back high refractive index layer 56 utilize the difference in refractive index from the front low refractive index layer 45 and the back low refractive index layer 55 to play a role in reducing the light reflectance of the front antireflection layer 40 and the back antireflection layer 50 by an interference effect. The front high refractive index layer 46 and the back high refractive index layer 56 can each be formed, for example, from a coating liquid for layer formation containing a curable resin composition and high refractive index particles.

[0139] From the perspective of making the front antireflection layer 40 and the back antireflection layer 50 have an ultra-low reflectance, it is preferable to increase the refractive index of the front high refractive index layer 46 and the back high refractive index layer 56. However, increasing the refractive index requires a large amount of high refractive index particles, which causes aggregation of the high refractive particles and leads to whitening. Therefore, 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. Also, the thickness of the front high refractive index layer 46 and the back 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 front high refractive index layer 46 and the back high refractive index layer 56 each have a two-layer structure described later, it is preferable that the total thickness of the two layers satisfies the above value. Further, the front high refractive index layer 46 and the back high refractive index layer 56 may be formed from a plurality of layers that satisfy the above refractive index range. However, from the perspective of cost-effectiveness, two layers or less are preferable, and a single layer is more preferable.

[0140] Examples of the high refractive index particles include antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 or more and 2.7 or less), cerium oxide (1.95), tin-doped indium oxide (1.95 or more and 2.00 or less), antimony-doped tin oxide (1.75 or more and 1.85 or less), yttrium oxide (1.87), and zirconium oxide (2.10). The values in parentheses indicate the refractive indices of the materials of the respective particles. Among these high refractive index particles, particles having a refractive index exceeding 2.0 are preferable from the viewpoint of achieving the above-described suitable refractive index with a small amount of addition. In addition, high refractive index particles having conductivity such as antimony pentoxide, tin-doped indium oxide (ITO), and antimony-doped tin oxide (ATO) have free electrons whose plasma oscillation frequency is in the near-infrared region, and due to the plasma oscillation of the free electrons, part of the light in the visible light region is absorbed or reflected, making it difficult to suppress the color tone. Therefore, the high refractive index particles are preferably non-conductive particles. From the above, among the high refractive index particles exemplified above, titanium oxide and zirconium oxide are preferable, and zirconium oxide is most preferable from the viewpoint of high durability stability such as light resistance. When it is desired to impart antistatic properties to the front surface antireflection layer 40 and the back surface antireflection layer 50, the front surface high refractive index layer 46 and the back surface high refractive index layer 56 are formed into a two-layer structure as described later, and it is preferable to contain conductive high refractive index particles in one of the layers.

[0141] The average particle diameter of the primary particles of the high refractive index particles is preferably 5 nm or more and 200 nm or less, more preferably 5 nm or more and 100 nm or less, and even more preferably 10 nm or more and 80 nm or less. The average particle 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 operations (1) to (3). (1) For the particles themselves or the material obtained by coating and drying a dispersion of the particles on a transparent substrate, a surface image of SEM, TEM, or STEM is taken. (2) Extract any 10 particles from the surface image, measure the major axis and minor axis of each particle, and calculate the particle diameter of each particle from the average of the major axis and minor axis. Here, the major axis is the longest diameter on the screen, and the minor axis is obtained by drawing a line segment perpendicular to the midpoint of the line segment constituting the major axis, and taking the distance between the two points where the perpendicular line segment intersects the particle. (3) Perform the same operation 5 times for imaging on another screen of the same sample, and take the value obtained from the number average of the particle diameters of a total of 50 particles as the average particle diameter. When calculating the average particle diameter of the particles, when the average particle diameter to be calculated is on the order of μm, it is preferable to use SEM. When the average particle diameter to be calculated is on the order of nm, it is preferable to use TEM or STEM. In the case of SEM, the acceleration voltage is preferably 1 kV or more and 10 kV or less, and the magnification is preferably 1000 times or more and 7000 times or less. In the case of TEM or STEM, the acceleration voltage is preferably 10 kV or more and 30 kV or less, and the magnification is preferably 50,000 times or more and 300,000 times or less.

[0142] From the viewpoint of the balance of high refractive index, color suppression, and whitening suppression, the content of the high refractive index particles is preferably 30 parts by mass or more and 400 parts by mass or less, more preferably 50 parts by mass or more and 200 parts by mass or less, and still more preferably 80 parts by mass or more and 150 parts by mass or less with respect to 100 parts by mass of the curable resin composition.

[0143] The surface high refractive index layer 46 and the back surface high refractive index layer 56 are preferably dispersion-stabilized in order to suppress excessive aggregation of the high refractive index particles. Examples of the means for dispersion stabilization include a means of adding another high refractive index particle having a smaller surface charge amount than the base high refractive index particles to the base high refractive index particles. According to this means, the base high refractive index particles appropriately gather around the other high refractive index particles, and it is possible to suppress excessive aggregation of the base high refractive index particles. Further, as another means for dispersion stabilization, there are mentioned a means of using particles surface-treated as high refractive index particles and a means of adding a dispersant to the coating liquid for layer formation.

[0144] As the curable resin composition for forming the surface high refractive index layer 46 and the back surface high refractive index layer 56, Materials similar to those exemplified in the description of the front hard coat layer 44 and the back hard coat layer 54 can be used, and an ionizing radiation curable resin composition is preferred. Further, in order to obtain the above-described refractive index without excessively increasing the addition amount of the high refractive index particles, it is preferable to use a curable resin composition having a high refractive index. The refractive index of the curable resin composition is preferably about 1.54 or more and 1.70 or less.

[0145] Here, as described above, the front high refractive index layer 46 may include a first front high refractive index layer 47 and a second front high refractive index layer 48. In this case, it is preferable that the refractive index of the first front high refractive index layer 47 is higher than the refractive index of the second front high refractive index layer 48. Thereby, the refractive index difference between the front high refractive index layer 46 and the front low refractive index layer 45 can be increased, the reflectance of the front antireflection layer 40 can be lowered, the refractive index difference between the front high refractive index layer 46 and the front hard coat layer 44 can be decreased, and the generation of interference fringes can be suppressed.

[0146] Further, as described above, the back high refractive index layer 56 may include a first back high refractive index layer 57 and a second back high refractive index layer 58. In this case, similar to the case of the front high refractive index layer 46, it is preferable that the refractive index of the first back high refractive index layer 57 is higher than the refractive index of the second back high refractive index layer 58. Thereby, the refractive index difference between the back high refractive index layer 56 and the back low refractive index layer 55 can be increased, the reflectance of the back antireflection layer 50 can be lowered, the refractive index difference between the back high refractive index layer 56 and the back hard coat layer 54 can be decreased, and the generation of interference fringes can be suppressed.

[0147] Also, when the front high refractive index layer 46 and the back high refractive index layer 56 are each composed of two layers, the refractive indices of the first front high refractive index layer 47 and the first back high refractive index layer 57 are preferably 1.60 or more and 1.85 or less, respectively, and the refractive indices of the second front high refractive index layer 48 and the second back high refractive index layer 58 are preferably 1.55 or more and 1.70 or less, respectively. Further, in the above two-layer structure, one layer contains conductive high refractive index particles, the other layer contains non-conductive high refractive index particles, and [the thickness of the layer containing conductive high refractive index particles < the thickness of the layer containing non-conductive high refractive index particles] is preferable. By adopting such a configuration, antistatic properties can be imparted while suppressing the addition amount of conductive high refractive index particles that can cause color tone. In addition, the conductive high refractive index particles are preferably networked within the layer, because they can impart antistatic properties with a small addition amount, and thus can suppress color tone and whitening.

[0148] The front high refractive index layer 46 and the back high refractive index layer 56 can be formed by preparing a coating liquid for layer formation with high refractive index particles, a curable resin composition, additives such as an ultraviolet absorber and a leveling agent blended as needed, and a diluting solvent, and applying the coating liquid onto the front hard coat layer 44 or the back hard coat layer 54 by a conventionally known coating method, drying, and irradiating with ionizing radiation for curing as needed.

[0149] [Transparent adhesive layer, first transparent adhesive layer, and second transparent adhesive layer] Transparent adhesive layers such as the transparent adhesive layer 31, the first transparent adhesive layer 31a, and the second transparent adhesive layer 31b are layers for adhering the surface antireflection layer 40, the back antireflection layer 50, the core layer 32, etc. to each other. Here, the "transparent adhesive layer" in this specification is a concept including a transparent pressure-sensitive adhesive layer. The transparent adhesive layer can generally be formed using various materials used as adhesives. Examples include, for example, acrylic adhesives, urethane adhesives, olefin adhesives, rubber adhesives, silicone adhesives, and polyester adhesives. An acrylic adhesive with high transparency and high adhesive strength is preferable.

[0150] Each of the above adhesives can contain various functional agents, stabilizers, etc. within a range that does not inhibit transparency. Also, an adhesion promoter can be blended to enhance the adhesive force. Further, a crosslinked structure can be formed using a crosslinking agent such as isocyanate, epoxy, or a double bond-containing compound according to each resin.

[0151] The transparent adhesive layer can also be formed using an adhesive (OCA, Optical Clear Adhesive) of a type laminated with release films on both sides. Commercially available products can also be used. For example, optical transparent adhesive sheet LUCIACS series (manufactured by Nitto Denko Corporation), high transparency double-sided tape 5400A series (manufactured by Sekisui Chemical Co., Ltd.), optical adhesive sheet Opteria series (manufactured by Lintec Corporation), SANCUARY series (manufactured by Sun-A Kaken Co., Ltd.), optical transparent adhesive OAD series (manufactured by Toyobo Co., Ltd.), coreless double-sided tape for optics RA series (manufactured by Sumilon Corporation), Panaclean series PD-S1 (manufactured by Panac Corporation), etc. can be mentioned. The adhesive force of these adhesives is generally 10 N / 25 mm or more.

[0152] The thickness of the transparent adhesive layer is not particularly limited, but for example, it is preferably 2 μm or more and 200 μm or less. If the film thickness of the transparent adhesive layer is 2 μm or more, the surface antireflection layer 40, the back surface antireflection layer 50, etc. can be reliably joined, and if the film thickness of the transparent adhesive layer is 200 μm or less, transparency (light transmittance) can be maintained. The lower limit of the film 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.

[0153] The method for forming the transparent adhesive layer is not particularly limited, and a known method used in the production of adhesive tapes or the like can be adopted. Specifically, a paint of an adhesive composition in which each component for forming the above transparent adhesive layer is dissolved or dispersed in an appropriate organic solvent or water is applied to the surface of the base material and dried and cured. After applying each component for forming the above transparent adhesive layer, a double bond-containing monomer, oligomer, crosslinking agent, etc. to the base material without a solvent, it can be formed by any method such as a method of crosslinking with radiation or an extrusion lamination method.

[0154] When using OCA, the transparent adhesive layer can be formed by peeling the release film on the easy-peel side of the OCA and bonding the adhesive surface to the base material.

[0155] [Core layer] The core layer 32 serves to support the front surface antireflection layer 40 and the back surface antireflection layer 50. As the material of the core layer 32, the same materials as those of the above-described front surface transparent base material layer 42 and back surface transparent base material layer 52 can be used.

[0156] There is no particular limitation on the thickness of the core layer 32, and it is appropriately selected according to the application. The thickness of the core layer 32 may be about 5 μm or more and 130 μm or less, and preferably 10 μm or more and 100 μm or less in consideration of durability, handleability, etc.

[0157] The above-described transparent laminated film 30 preferably has a thickness of 60 μm or more and 500 μm or less. When the thickness of the transparent laminated film 30 is 60 μm or more, it is possible to effectively suppress the adhesion of droplets such as saliva of the wearer H to the face of others or the adhesion of droplets such as saliva of others to the face of the wearer H. Further, when the thickness of the transparent laminated film 30 is 500 μm or less, the transparency of the transparent laminated film 30 can be improved.

[0158] In addition, the above-described transparent laminated film 30 preferably has a restoring function. Thereby, when the transparent laminated film 30 is bent or rolled up, the transparent laminated film 30 can be restored to a flat shape. Here, the restoring function means a function in which, even after the object (transparent laminated film 30) is bent for a certain period of time, the bent object is restored to a flat shape without creases being formed in the bent object.

[0159] The above-described transparent laminated film 30 preferably has a light reflectance of 1.0% or less and a total light transmittance (JIS K7361-1:1997) of 90% or more. Thereby, while further improving the visibility when the transparent laminated film 30 is viewed from the surface 301 side, the visibility when the transparent laminated film 30 is viewed from the back surface 302 side can be further improved. Further, the transparent laminated film 30 more preferably has a total light transmittance of 92% or more. Further, the transparent laminated film 30 preferably has a haze (JIS K7136:2000) of 1.0% or less, more preferably 0.5% or less, and even more preferably 0.3% or less.

[0160] The above-described transparent laminated film 30 preferably has a transmittance in the ultraviolet region with a wavelength of 380 nm or less of 1% or less. Thereby, even when the wearer H wearing the face shield 10 works in an environment exposed to direct sunlight, it is possible to suppress the wearer H from getting sunburned.

[0161] The above-described transparent laminated film 30 preferably has a bending stress of 6 N / 20 mm or less. Thereby, the flexibility of the transparent laminated film 30 can be improved. For this reason, in the transparent laminated film 30, when the shield portion 30A made from the transparent laminated film 30 is bent, it is possible to suppress the occurrence of creases, scratches, etc. in the shield portion 30A.

[0162] In the above-described transparent laminated film 30, the arithmetic mean roughness Ra (JIS B0601: 1994) of the front surface 301 and the back surface 302 is preferably 10 nm or less, more preferably 1 nm or more and 8 nm or less. Further, the ten-point mean roughness Rz (JIS B0601: 1994) of the front surface 301 and the back surface 302 is preferably 160 nm or less, more preferably 50 nm or more and 155 nm or less. If Ra and Rz are within the above ranges, the film has smoothness and improved scratch resistance.

[0163] Method for manufacturing a transparent laminated film and a face shield Next, a method for manufacturing the transparent laminated film and the face shield according to the present embodiment will be described. Here, first, a method for manufacturing the transparent laminated film 30 will be described.

[0164] First, a front surface antireflection layer 40 is produced. At this time, for example, first, a resin film constituting the front surface transparent base material layer 42 is prepared. Next, a coating liquid for forming a hard coat layer is applied onto the resin film, dried, and irradiated with ultraviolet rays to form a front surface hard coat layer 44. Next, a coating liquid for forming a high refractive index layer is applied onto this front surface hard coat layer 44, dried, and irradiated with ultraviolet rays to form a front surface high refractive index layer 46. Next, a coating liquid for forming a low refractive index layer is applied onto this front surface high refractive index layer 46, dried, and irradiated with ultraviolet rays to form a front surface low refractive index layer 45. In this way, the front surface antireflection layer 40 can be obtained.

[0165] Further, a back surface antireflection layer 50 is produced. At this time, for example, first, a resin film constituting the back surface transparent base material layer 52 is prepared. Next, a coating liquid for forming a hard coat layer is applied onto the resin film, dried, and irradiated with ultraviolet rays to form a back surface hard coat layer 54. Next, a coating liquid for forming a high refractive index layer is applied onto this back surface hard coat layer 54, dried, and irradiated with ultraviolet rays to form a back surface high refractive index layer 56. Next, a coating liquid for forming a low refractive index layer is applied onto this back surface high refractive index layer 56, dried, and irradiated with ultraviolet rays to form a back surface low refractive index layer 55. In this way, the back surface antireflection layer 50 can be obtained.

[0166] Then, the front surface antireflection layer 40 and the back surface antireflection layer 50 are adhered to each other via the transparent adhesive layer 31 to produce the transparent laminated film 30. In this way, the transparent laminated film 30 can be produced.

[0167] Next, the front surface protective film 61 is attached to the front surface 301 of the obtained transparent laminated film 30, and the back surface protective film 62 is attached to the back surface 302. At this time, the front surface protective film 61 and the back surface protective film 62 each include a bonding layer (not shown), and may be attached to the transparent laminated film 30 by this bonding layer. In this way, the transparent laminated film 60 with protective films can be produced. Note that the front surface protective film 61 and the back surface protective film 62 may be separately attached to the front surface antireflection layer 40 and the back surface antireflection layer 50, respectively, before the front surface antireflection layer 40 and the back surface antireflection layer 50 are joined to each other via the transparent adhesive layer 31.

[0168] Next, the face shield 10 is produced.

[0169] At this time, first, the transparent laminated film 60 with protective films is processed into a predetermined shape. In this case, the transparent laminated film 60 with protective films may be processed by punching using a die, cutting using a drill, or laser processing using a laser. From the viewpoints of processing speed and productivity, it is preferable that the transparent laminated film 60 with protective films is processed by punching.

[0170] Next, the front surface protective film 61 and the back surface protective film 62 are removed from the transparent laminated film 60 with protective films processed into a predetermined shape. Thereby, the transparent laminated film 30 processed into a predetermined shape is obtained (see FIG. 4).

[0171] Thereafter, the first engaging portion 75a is locked to the first locking portion 76a, and the second engaging portion 75b is locked to the second locking portion 76b. As a result, a first curved surface 77a, a second curved surface 77b, and a third curved surface 77c are formed on the transparent laminated film 30. In this way, the shield portion 30A is assembled.

[0172] Also, in parallel with manufacturing the transparent laminated film 30, the holding member 20 is manufactured. At this time, for example, the holding member 20 shown in FIG. 1 is manufactured by bending a rod-shaped member made of aluminum.

[0173] Next, the attachment portion 25 of the holding member 20 is inserted into the opening 80 formed in the transparent laminated film 30. As a result, the face shield 10 shown in FIG. 1 is obtained.

[0174] As described above, according to the present embodiment, a plurality of first cut portions 74a are formed on the lower side 72 of the transparent laminated film 30 that constitutes the shield portion 30A. Also, a first engaging portion 75a is formed on one side of the first cut portion 74a, and a first locking portion 76a that locks the first engaging portion 75a is formed on the other side of the first cut portion 74a. By locking the first engaging portion 75a to the first locking portion 76a, a first curved surface 77a that curves convexly away from the wearer H is formed in the vicinity of the lower side 72. As a result, the droplets scattered downward adhere to the first curved surface 77a. Therefore, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the droplets scattered downward from adhering to surrounding structures.

[0175] Further, since the first curved surface 77a curves convexly away from the wearer H, the region where the first curved surface 77a is formed is likely to elastically deform when an impact is applied to the region. Therefore, even when the face shield 10 is dropped, the region where the first curved surface 77a is formed elastically deforms, so that the region can absorb the impact of the fall. Therefore, it is possible to suppress the face shield 10 from being damaged.

[0176] Further, according to the present embodiment, a plurality of second cut portions 74b are formed on the upper side 71 of the transparent laminated film 30. Further, a second engaging portion 75b is formed on one side of the second cut portion 74b, and a second locking portion 76b for locking the second engaging portion 75b is formed on the other side of the second cut portion 74b. By locking the second engaging portion 75b to the second locking portion 76b, a second curved surface 77b that curves convexly away from the wearer H is formed in the vicinity of the upper side 71. As a result, the droplets scattered upward adhere to the second curved surface 77b. Therefore, it is possible to suppress the droplets from scattering from above the face shield 10 to the surroundings. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Further, by forming the second curved surface 77b in the vicinity of the upper side 71, the head of the wearer H can be covered by the second curved surface 77b, and the wearer H can be effectively protected from the droplets scattered from the outside (above).

[0177] Further, according to the present embodiment, by locking the first engaging portion 75a to the first locking portion 76a and locking the second engaging portion 75b to the second locking portion 76b, a third curved surface 77c that curves convexly away from the wearer H is formed between the first curved surface 77a and the second curved surface 77b. As a result, the droplets scattered in the direction facing the wearer H and in the left-right direction as viewed from the wearer H adhere to the third curved surface 77c. Therefore, it is possible to suppress the droplets from scattering from the side of the face shield 10 to the surroundings. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures.

[0178] Also, according to the present embodiment, the third curved surface 77c has a linear shape in a vertical cross section. Thereby, it is possible to suppress the size of the face shield 10 from becoming too large. For this reason, when the wearer H moves their head or the like, it is possible to suppress the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or other people. Further, since it is possible to suppress the size of the face shield 10 from becoming too large, even when the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

[0179] Also, according to the present embodiment, the holding member 20 includes a pair of attachment portions 25 for holding the transparent laminated film 30, and openings 80 into which the attachment portions 25 are inserted are formed in the vicinity of a pair of side edges 73 of the transparent laminated film 30, respectively. In this case, by inserting the attachment portion 25 into the opening 80, the holding member 20 can easily hold the transparent laminated film 30.

[0180] Furthermore, according to the present embodiment, the holding member 20 holds the transparent laminated film 30 so as to be movable in the vertical direction. Thereby, even when the shield portion 30A comes into contact with surrounding structures, the shield portion 30A moves with respect to the holding member 20, so that it is possible to suppress an impact being applied to the wearer H from the face shield 10 and the face shield 10 from coming off the wearer H.

[0181] In the above-described embodiment, an example in which the second curved surface 77b and the third curved surface 77c are formed on the transparent laminated film 30 has been described, but the present invention is not limited thereto. For example, the second curved surface 77b and the third curved surface 77c may not be formed on the transparent laminated film 30.

[0182] In addition, in the above-described embodiment, an example in which the temple part 21 and the connecting part 23 are integrally formed has been described, but the present invention is not limited to this. For example, as shown in FIG. 10, the connecting part 23 may be provided separately from the temple part 21. And the connecting part 23 may adjust the inclination of the temple part 21 with respect to the horizontal direction.

[0183] In this case, as shown in FIG. 11, the connecting part 23 may include a main body part 23a extending in a substantially arc shape and engaging parts 23b provided at both ends of the main body part 23a. Among these, through holes 23c may be formed in the engaging parts 23b, respectively. And the temple part 21 may be inserted into the through hole 23c so that the connecting part 23 is configured to be attached to the temple part 21. In this case, for example, by adjusting the position of the connecting part 23 with respect to the temple part 21, the inclination of the temple part 21 with respect to the horizontal direction can be adjusted by the weight of the connecting part 23. Note that the shape of the through hole 23c may be circular in a front view, and is preferably a polygonal shape such as a square shape. Since the shape of the through hole 23c is polygonal in a front view, the connecting part 23 can stably hold the temple part 21, and the inclination of the temple part 21 with respect to the horizontal direction can be maintained at a desired inclination. In this case, in a cross section along a direction perpendicular to the longitudinal direction of the temple part 21, the cross-sectional shape of the temple part 21 is preferably a polygonal shape such as a square shape.

[0184] According to this modification, the connecting part 23 is provided separately from the temple part 21 and adjusts the inclination of the temple part 21 with respect to the horizontal direction. Thereby, it is possible to suppress the shield part 30A from coming into contact with the face F of the wearer H. Further, when the connecting part 23 is provided separately from the temple part 21, the size of the connecting part 23 can also be changed according to the size of the head of the wearer H. And by appropriately changing the size of the connecting part 23, it is possible to suppress the head of the wearer H from being clamped by the pair of temple parts 21. Thereby, it is possible to suppress the wearer H from feeling discomfort, and the wearer H can wear the face shield 10 without feeling stress.

[0185] < Second Embodiment > Next, a second embodiment will be described with reference to FIGS. 12 to 17. The second embodiment shown in FIGS. 12 to 17 mainly differs from the first embodiment in the configuration of the shield portion (transparent laminated film). In FIGS. 12 to 17, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0186] As shown in FIGS. 12 to 17, also in this embodiment, the transparent laminated film 30 constituting the shield portion 30A has a rectangular shape (see FIG. 17) having an upper side 71, a lower side 72 facing the upper side 71, and a pair of side sides 73 extending between the upper side 71 and the lower side 72.

[0187] As shown in FIGS. 13 to 17, in the vicinity of the lower side 72, a first lower panel 91a and a second lower panel 92a are provided along the extending direction of the lower side 72 (the left - right direction in FIG. 17). Further, a lower fixing panel 95a for fixing the first lower panel 91a and the second lower panel 92a is provided on the upper side 71 side of the first lower panel 91a and the second lower panel 92a.

[0188] The first lower panel 91a and the second lower panel 92a each have a pentagonal shape with one corner of a rectangle cut out in a front view. Specifically, the first lower panel 91a has a pentagonal shape with the upper - right corner of the rectangle cut out in a front view. On the other hand, the second lower panel 92a has a pentagonal shape with the upper - left corner of the rectangle cut out in a front view. The first lower panel 91a and the second lower panel 92a are symmetric with respect to a first lower cut - in portion 101a described later. The lower fixing panel 95a has a triangular shape in a front view.

[0189] The first lower panel 91a and the second lower panel 92a are separated from each other by a first lower cutout portion 101a that penetrates the transparent laminated film 30. This first lower cutout portion 101a is formed along the extending direction of the side edge 73 (the vertical direction in FIG. 17).

[0190] The first lower panel 91a and the lower fixed panel 95a are separated from each other by a second lower cutout portion 102a that penetrates the transparent laminated film 30. Also, the second lower panel 92a and the lower fixed panel 95a are separated from each other by a third lower cutout portion 103a that penetrates the transparent laminated film 30. The second lower cutout portion 102a and the third lower cutout portion 103a are each formed along a direction that is inclined in both the extending direction of the lower side 72 (the left - right direction in FIG. 17) and the extending direction of the side edge 73 (the vertical direction in FIG. 17). The third lower cutout portion 103a and the fourth lower cutout portion 104a are connected to each other and are each connected to the first lower cutout portion 101a.

[0191] Then, in a state where the first lower panel 91a and the second lower panel 92a are overlapped with each other, by fixing them to the lower fixed panel 95a, a first lower curved surface 96a (see FIGS. 12, 13, 14, and 16) that curves so as to be convex toward the side away from the wearer H is formed in the vicinity of the lower side 72. Thereby, the droplets scattered downward adhere to the first lower curved surface 96a. For this reason, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the droplets scattered downward from adhering to the surrounding structures.

[0192] In addition, since the first lower curved surface 96a is curved so as to bulge toward the side away from the wearer H, the region where the first lower curved surface 96a is formed is easily elastically deformed when an impact is applied to the region. Therefore, even when the face shield 10 is dropped, the region where the first lower curved surface 96a is formed elastically deforms, so that the region can absorb the impact of the drop. Thus, damage to the face shield 10 can be suppressed.

[0193] This first lower curved surface 96a may be a three-dimensional curved surface. For example, at any position, the vertical cross-sectional shape of the first lower curved surface 96a may be bent as a whole so as to bulge toward the side away from the wearer H, and at any position, the horizontal cross-sectional shape thereof may be bent so as to bulge toward the side away from the wearer H.

[0194] In addition, a third lower panel 93a and a fourth lower panel 94a are provided along the extending direction of the lower side 72 (lateral direction in FIG. 17) on the lower side 72 side (outer side) of the first lower panel 91a and the second lower panel 92a. In the present specification, the "outer side" refers to the side away from the center of the transparent laminated film 30.

[0195] The third lower panel 93a and the fourth lower panel 94a each have an L shape in a front view. The third lower panel 93a and the fourth lower panel 94a are symmetric with respect to a fourth lower cutout portion 104a described later.

[0196] The third lower panel 93a and the fourth lower panel 94a are separated from each other by a fourth lower cutout portion 104a that penetrates the transparent laminated film 30. This fourth lower cutout portion 104a extends from the lower side 72. Further, the fourth lower cutout portion 104a is formed along the extending direction of the side 73 (vertical direction in FIG. 17). The fourth lower cutout portion 104a is connected to the first lower cutout portion 101a.

[0197] The first lower panel 91a and the third lower panel 93a are separated from each other by a fifth lower cutout portion 105a that penetrates the transparent laminated film 30. Also, the second lower panel 92a and the fourth lower panel 94a are separated from each other by a sixth lower cutout portion 106a that penetrates the transparent laminated film 30. The fifth lower cutout portion 105a and the sixth lower cutout portion 106a are each formed along the extending direction of the lower side 72 (the left - right direction in FIG. 17). The fifth lower cutout portion 105a and the sixth lower cutout portion 106a are connected to each other and are each connected to the first lower cutout portion 101a and the fourth lower cutout portion 104a, respectively.

[0198] Also, the first lower panel 91a and the third lower panel 93a are separated from each other by a seventh lower cutout portion 107a that penetrates the transparent laminated film 30. The seventh lower cutout portion 107a is formed along the extending direction of the side 73 (the up - down direction in FIG. 17). The seventh lower cutout portion 107a is connected to the fifth lower cutout portion 105a.

[0199] Furthermore, the second lower panel 92a and the fourth lower panel 94a are separated from each other by an eighth lower cutout portion 108a that penetrates the transparent laminated film 30. The eighth lower cutout portion 108a is formed along the extending direction of the side 73 (the up - down direction in FIG. 17). The eighth lower cutout portion 108a is connected to the sixth lower cutout portion 106a.

[0200] Then, in a state where the third lower panel 93a and the fourth lower panel 94a are overlapped with each other, they are fixed to the lower fixing panel 95a, so that a second lower curved surface 97a that curves convexly toward the side away from the wearer H is formed outside the first lower curved surface 96a. Thereby, the droplets scattered downward adhere to the first lower curved surface 96a and the second lower curved surface 97a. For this reason, it is possible to more effectively suppress the droplets from falling below the face shield 10. As a result, it is possible to more effectively suppress the droplets scattered downward from adhering to the surrounding structures.

[0201] This second lower curved surface 97a may be a three-dimensional curved surface. For example, the second lower curved surface 97a may be bent as a whole such that, at any position, its vertical cross-sectional shape is convex toward the side away from the wearer H, and at any position, its horizontal cross-sectional shape is bent such that it is convex toward the side away from the wearer H.

[0202] In addition, in the present embodiment, the first lower panel 91a, the second lower panel 92a, the third lower panel 93a, and the fourth lower panel 94a may be fixed to the lower fixed panel 95a via the fixing member 100a. In this case, the fixing member 100a may be, for example, a staple pin. Further, the fixing member 100a may be an adhesive, a tape, a clip, or the like.

[0203] Also, as shown in FIGS. 13 to 17, a first upper panel 91b and a second upper panel 92b are provided in the vicinity of the upper side 71 along the extending direction of the upper side 71 (the left-right direction in FIG. 17). Further, an upper fixed panel 95b for fixing the first upper panel 91b and the second upper panel 92b is provided on the lower side 72 side of the first upper panel 91b and the second upper panel 92b.

[0204] The first upper panel 91b and the second upper panel 92b each have a pentagonal shape with one corner of a rectangle cut out in a front view. Specifically, the first upper panel 91b has a pentagonal shape with the lower right corner of the rectangle cut out in a front view. On the other hand, the second upper panel 92b has a pentagonal shape with the lower left corner of the rectangle cut out in a front view. The first upper panel 91b and the second upper panel 92b are symmetric with respect to a first upper cutout portion 101b described later. The upper fixed panel 95b has a triangular shape in a front view.

[0205] The first upper panel 91b and the second upper panel 92b are separated from each other by a first upper cutout portion 101b that penetrates the transparent laminated film 30. This first upper cutout portion 101b is formed along the extending direction of the side 73 (the vertical direction in FIG. 17).

[0206] The first upper panel 91b and the upper fixing panel 95b are separated from each other by a second upper cutout portion 102b that penetrates the transparent laminated film 30. Also, the second upper panel 92b and the upper fixing panel 95b are separated from each other by a third upper cutout portion 103b that penetrates the transparent laminated film 30. These second upper cutout portion 102b and third upper cutout portion 103b are each formed along a direction that is inclined in both the extending direction of the upper side 71 (the left - right direction in FIG. 17) and the extending direction of the side 73 (the vertical direction in FIG. 17). The third upper cutout portion 103b and the fourth upper cutout portion 104b are connected to each other and are each connected to the first upper cutout portion 101b.

[0207] Then, in a state where the first upper panel 91b and the second upper panel 92b are overlapped with each other, by fixing them to the upper fixing panel 95b, a first upper curved surface 96b (see FIGS. 12, 13, 15, and 16) that curves convexly toward the side away from the wearer H is formed in the vicinity of the upper side 71. Thereby, the droplets scattered upward adhere to the first upper curved surface 96b. For this reason, it is possible to suppress the droplets from scattering around from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Also, by forming the first upper curved surface 96b in the vicinity of the upper side 71, the first upper curved surface 96b can cover the head of the wearer H, and it is possible to effectively protect the wearer H from the droplets scattered from the outside.

[0208] This first upper curved surface 96b may be a three-dimensional curved surface. For example, the first upper curved surface 96b may be bent as a whole such that, at any position, its vertical cross-sectional shape is convex toward the side away from the wearer H, and at any position, its horizontal cross-sectional shape is bent such that it is convex toward the side away from the wearer H.

[0209] Further, a third upper panel 93b and a fourth upper panel 94b are provided on the upper side 71 side (outer side) of the first upper panel 91b and the second upper panel 92b, along the extending direction of the upper side 71 (left-right direction in FIG. 17).

[0210] The third upper panel 93b and the fourth upper panel 94b each have an L shape in a front view. The third upper panel 93b and the fourth upper panel 94b are symmetric with respect to a fourth upper cutout portion 104b described later.

[0211] The third upper panel 93b and the fourth upper panel 94b are separated from each other by a fourth upper cutout portion 104b that penetrates the transparent laminated film 30. This fourth upper cutout portion 104b extends from the upper side 71. Further, the fourth upper cutout portion 104b is formed along the extending direction of the side 73 (up-down direction in FIG. 17). The fourth upper cutout portion 104b is connected to the first upper cutout portion 101b.

[0212] The first upper panel 91b and the third upper panel 93b are separated from each other by a fifth upper cutout portion 105b that penetrates the transparent laminated film 30. Also, the second upper panel 92b and the fourth upper panel 94b are separated from each other by a sixth upper cutout portion 106b that penetrates the transparent laminated film 30. The fifth upper cutout portion 105b and the sixth upper cutout portion 106b are each formed along the extending direction of the upper side 71 (left-right direction in FIG. 17). The fifth upper cutout portion 105b and the sixth upper cutout portion 106b are connected to each other and are each connected to the first upper cutout portion 101b and the fourth upper cutout portion 104b.

[0213] Further, the first upper panel 91b and the third upper panel 93b are separated from each other by a seventh upper cutout portion 107b that penetrates the transparent laminated film 30. The seventh upper cutout portion 107b is formed along the extending direction of the side edge 73 (the vertical direction in FIG. 17). The seventh upper cutout portion 107b is connected to the fifth upper cutout portion 105b.

[0214] Furthermore, the second upper panel 92b and the fourth upper panel 94b are separated from each other by an eighth upper cutout portion 108b that penetrates the transparent laminated film 30. The eighth upper cutout portion 108b is formed along the extending direction of the side edge 73 (the vertical direction in FIG. 17). The eighth upper cutout portion 108b is connected to the sixth upper cutout portion 106b.

[0215] Then, in a state where the third upper panel 93b and the fourth upper panel 94b are overlapped with each other, by fixing them to the upper fixing panel 95b, a second upper curved surface 97b that curves convexly on the side away from the wearer H is formed outside the first upper curved surface 96b. Thereby, the droplets scattered upward adhere to the first upper curved surface 96b and the second upper curved surface 97b. For this reason, it is possible to suppress the droplets from scattering around from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Further, since the second upper curved surface 97b is formed in the vicinity of the upper side 71, the second upper curved surface 97b can also cover the head of the wearer H, and it is possible to effectively protect the wearer H from the droplets scattered from the outside.

[0216] This second upper curved surface 97b may be a three-dimensional curved surface. For example, at any position, the vertical cross-sectional shape of the second upper curved surface 97b may be bent as a whole so as to be convex on the side away from the wearer H, and at any position, the horizontal cross-sectional shape may be bent so as to be convex on the side away from the wearer H.

[0217] The first lower panel 91a and the second lower panel 92a are fixed to the lower fixing panel 95a, and the first upper panel 91b and the second upper panel 92b are fixed to the upper fixing panel 95b, so that an intermediate curved surface 98 that curves convexly away from the wearer H is formed between the first lower curved surface 96a and the first upper curved surface 96b. Thereby, the droplets scattered in the direction facing the wearer and the left-right direction as seen from the wearer adhere to the intermediate curved surface 98. For this reason, it is possible to suppress the droplets from scattering to the surroundings from the side of the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to surrounding structures.

[0218] As shown in FIG. 16, the intermediate curved surface 98 has a linear shape in a vertical cross section. Thereby, it is possible to suppress the size of the face shield 10 (especially the size in the front-rear direction) from becoming too large. For this reason, when the wearer H moves his / her head or the like, it is possible to suppress the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or other people. In addition, since it is possible to suppress the size of the face shield 10 from becoming too large, even when the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

[0219] The intermediate curved surface 98 may be a two-dimensional curved surface. For example, the intermediate curved surface 98 may have a linear shape in its vertical cross-sectional shape at an arbitrary position, and may be bent so that its horizontal cross-sectional shape is convex away from the wearer H at an arbitrary position.

[0220] In the present embodiment, the first upper panel 91b, the second upper panel 92b, the third upper panel 93b, and the fourth upper panel 94b may be fixed to the upper fixing panel 95b via the fixing member 100b. In this case, the fixing member 100b may be, for example, a staple pin. The fixing member 100b may also be an adhesive, tape, clip, or the like.

[0221] In addition, in the present embodiment, "front view" means a state in which the wearer H wears the face shield 10 such that the portion of the pair of temple portions 21 located in front of the ear hook portion 22 is horizontal, and the second protrusion portion 27 abuts against the upper end of the second opening portion 82 described later (the state shown in FIG. 13). It means looking at the face shield 10 from the normal direction at the horizontal central portion 99 (see FIG. 13) of the intermediate portion curved surface 98 among the normal directions of the intermediate portion curved surface 98.

[0222] Also, in the present embodiment as well, for example, by changing the first opening portion 81 into which the first protrusion portion 26 is inserted, the front and rear positions of the shield portion 30A can be adjusted.

[0223] Furthermore, in the present embodiment, the opening portion 80 is formed in the region where the intermediate portion curved surface 98 is formed. And as described above, the intermediate portion curved surface 98 is curved so as to be convex toward the side away from the wearer H. Therefore, by inserting the pair of attachment portions 25 into the opening portion 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the above-described holding member 20 can easily hold the transparent laminated film 30.

[0224] According to the present embodiment as described above, a first lower panel 91a and a second lower panel 92a are provided in the vicinity of the lower side 72 and arranged along the extending direction of the lower side 72. Further, a lower fixing panel 95a for fixing the first lower panel 91a and the second lower panel 92a is provided on the upper side 71 side of the first lower panel 91a and the second lower panel 92a. Further, the first lower panel 91a and the second lower panel 92a are separated from each other by a first lower cut portion 101a that penetrates the transparent laminated film 30. Further, the first lower panel 91a and the lower fixing panel 95a are separated from each other by a second lower cut portion 102a that penetrates the transparent laminated film 30. Further, the second lower panel 92a and the lower fixing panel 95a are separated from each other by a third lower cut portion 103a that penetrates the transparent laminated film 30. Then, in a state where the first lower panel 91a and the second lower panel 92a are overlapped with each other and fixed to the lower fixing panel 95a, a first lower curved surface 96a that curves so as to be convex toward the side away from the wearer H is formed in the vicinity of the lower side 72. Thereby, the droplets scattered downward adhere to the first lower curved surface 96a. For this reason, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the droplets scattered downward from adhering to the surrounding structures.

[0225] Further, since the first lower curved surface 96a is curved so as to be convex toward the side away from the wearer H, the region where the first lower curved surface 96a is formed is easily elastically deformed when an impact is applied to the region. For this reason, even when the face shield 10 is dropped, the region where the first lower curved surface 96a is formed elastically deforms, so that the region can absorb the impact of the drop. For this reason, it is possible to suppress the face shield 10 from being damaged.

[0226] Further, according to the present embodiment, a third lower panel 93a and a fourth lower panel 94a are provided on the lower side 72 side of the first lower panel 91a and the second lower panel 92a and arranged along the extending direction of the lower side 72. Also, the third lower panel 93a and the fourth lower panel 94a are separated from each other by a fourth lower cutout portion 104a that penetrates the transparent laminated film 30. Further, the first lower panel 91a and the third lower panel 93a are separated from each other by a fifth lower cutout portion 105a that penetrates the transparent laminated film 30. Furthermore, the second lower panel 92a and the fourth lower panel 94a are separated from each other by a sixth lower cutout portion 106a that penetrates the transparent laminated film 30. Then, in a state where the third lower panel 93a and the fourth lower panel 94a are overlapped with each other, by fixing them to the lower fixing panel 95a, a second lower curved surface 97a that curves so as to protrude toward the side away from the wearer H is formed outside the first lower curved surface 96a. Thereby, the droplets scattered downward adhere to the first lower curved surface 96a and the second lower curved surface 97a. For this reason, it is possible to more effectively suppress the droplets from falling below the face shield 10. As a result, it is possible to more effectively suppress the droplets scattered downward from adhering to the surrounding structures.

[0227] Also, according to the present embodiment, the fourth lower cutout portion 104a extends from the lower side 72. Thereby, the curvature of the second lower curved surface 97a formed by the third lower panel 93a and the fourth lower panel 94a can be increased. For this reason, the second lower curved surface 97a can more easily cover the wearer H's jaw from below. As a result, it is possible to more effectively suppress the droplets from falling below the face shield 10. Therefore, it is possible to more effectively suppress the droplets scattered downward from adhering to the surrounding structures.

[0228] Further, according to the present embodiment, a first upper panel 91b and a second upper panel 92b are provided in the vicinity of the upper side 71 and arranged along the extending direction of the upper side 71. Further, an upper fixing panel 95b for fixing the first upper panel 91b and the second upper panel 92b is provided on the lower side 72 side of the first upper panel 91b and the second upper panel 92b. Further, the first upper panel 91b and the second upper panel 92b are separated from each other by a first upper cut portion 101b penetrating the transparent laminated film 30. Further, the first upper panel 91b and the upper fixing panel 95b are separated from each other by a second upper cut portion 102b penetrating the transparent laminated film 30. Further, the second upper panel 92b and the upper fixing panel 95b are separated from each other by a third upper cut portion 103b penetrating the transparent laminated film 30. Then, in a state where the first upper panel 91b and the second upper panel 92b are overlapped with each other, by fixing them to the upper fixing panel 95b, a first upper curved surface 96b that curves so as to protrude toward the side away from the wearer H is formed in the vicinity of the upper side 71. As a result, the droplets scattered upward adhere to the first upper curved surface 96b. Therefore, it is possible to suppress the droplets from scattering to the surroundings from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Further, by forming the first upper curved surface 96b in the vicinity of the upper side 71, the first upper curved surface 96b can also cover the head of the wearer H, and the wearer H can be effectively protected from the droplets scattered from the outside.

[0229] Further, according to the present embodiment, a third upper panel 93b and a fourth upper panel 94b are provided on the upper side 71 side of the first upper panel 91b and the second upper panel 92b along the extending direction of the upper side 71. Further, the third upper panel 93b and the fourth upper panel 94b are separated from each other by a fourth upper cutout portion 104b that penetrates the transparent laminated film 30. Further, the first upper panel 91b and the third upper panel 93b are separated from each other by a fifth upper cutout portion 105b that penetrates the transparent laminated film 30. Further, the second upper panel 92b and the fourth upper panel 94b are separated from each other by a sixth upper cutout portion 106b that penetrates the transparent laminated film 30. Then, in a state where the third upper panel 93b and the fourth upper panel 94b are overlapped with each other, by fixing them to the upper fixing panel 95b, a second upper curved surface 97b that curves convexly on the side away from the wearer H is formed outside the first upper curved surface 96b. Thereby, the droplets scattered upward adhere to the first upper curved surface 96b and the second upper curved surface 97b. For this reason, it is possible to more effectively suppress the droplets from scattering around from above the face shield 10. As a result, it is possible to more effectively suppress the droplets scattered upward from adhering to the surrounding structures. Further, since the second upper curved surface 97b is formed in the vicinity of the upper side 71, the second upper curved surface 97b can cover the head of the wearer H, and the wearer H can be effectively protected from droplets scattered from the outside.

[0230] Further, according to the present embodiment, the fourth upper cutout portion 104b extends from the upper side 71. Thereby, the curvature of the second upper curved surface 97b formed by the third upper panel 93b and the fourth upper panel 94b can be increased. For this reason, it becomes easier for the second upper curved surface 97b to cover the head of the wearer H from above. As a result, it is possible to more effectively suppress the droplets from scattering around from above the face shield 10. For this reason, it is possible to more effectively suppress the droplets scattered upward from adhering to the surrounding structures. Further, the wearer H can be more effectively protected from droplets scattered from the outside.

[0231] Further, according to the present embodiment, by fixing the first lower panel 91a and the second lower panel 92a to the lower fixing panel 95a, and fixing the first upper panel 91b and the second upper panel 92b to the upper fixing panel 95b, an intermediate curved surface 98 that curves convexly away from the wearer H is formed between the first lower curved surface 96a and the first upper curved surface 96b. Thereby, droplets scattered in the direction facing the wearer H and in the left - right direction as seen from the wearer H adhere to the intermediate curved surface 98. For this reason, it is possible to suppress the droplets from scattering to the surroundings from the side of the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to surrounding structures.

[0232] Furthermore, according to the present embodiment, the intermediate curved surface 98 has a linear shape in a vertical cross - section. Thereby, it is possible to suppress the size of the face shield 10 from becoming too large. For this reason, when the wearer H moves the head or the like, it is possible to suppress the transparent laminated film 30 constituting the shield portion 30A from coming into contact with surrounding structures or other people. Also, since it is possible to suppress the size of the face shield 10 from becoming too large, even when the wearer H is wearing the face shield 10, the wearer H can concentrate on the work without feeling stress.

[0233] < Third Embodiment > Next, a third embodiment will be described with reference to FIGS. 18 to 23. The third embodiment shown in FIGS. 18 to 23 mainly differs from the second embodiment in the configuration of the shield portion (transparent laminated film). In FIGS. 18 to 23, the same parts as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

[0234] As shown in FIGS. 18 to 23, also in the present embodiment, the transparent laminated film 30 constituting the shield portion 30A has a rectangular shape (see FIG. 23) having an upper side 71, a lower side 72 facing the upper side 71, and a pair of side sides 73 extending between the upper side 71 and the lower side 72.

[0235] As shown in FIGS. 19 to 23, on the shield portion 30A (transparent laminated film 30), a pair of first mountain fold portions 121b extending from the upper side 71 and a pair of first valley fold portions 122b extending from the upper side 71 and provided between the pair of first mountain fold portions 121b are formed.

[0236] Further, on the shield portion 30A (transparent laminated film 30), a pair of second mountain fold portions 121a extending from the lower side 72 and a pair of second valley fold portions 122a extending from the lower side 72 and provided between the pair of second mountain fold portions 121a are formed.

[0237] The pair of first mountain fold portions 121b and the pair of second mountain fold portions 121a each extend along the extending direction of the side 73 (the vertical direction in FIG. 23). Further, the pair of first valley fold portions 122b extend along a direction inclined in the extending direction of the side 73 so as to be spaced apart from each other as they go from the upper side 71 side to the lower side 72 side. Furthermore, the pair of second valley fold portions 122a extend along a direction inclined in the extending direction of the side 73 so as to be spaced apart from each other as they go from the lower side 72 side to the upper side 71 side.

[0238] Then, by folding the transparent laminated film 30 along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, a front surface 150 and an upper surface 151 provided above the front surface 150 and folded backward from the front surface 150 may be formed (see FIGS. 18, 19, 21, and 22). Thereby, the droplets scattered upward adhere to the upper surface 151. For this reason, it is possible to suppress the droplets from scattering to the surroundings from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures. Further, by forming the upper surface 151, the upper surface 151 can also cover the head of the wearer H, and the wearer H can be effectively protected from the droplets scattered from the outside (above).

[0239] Further, by folding the transparent laminated film 30 along a pair of second mountain fold portions 121a and a pair of second valley fold portions 122a, a front surface 150 and a lower surface 152 provided below the front surface 150 and folded backward from the front surface 150 may be formed (see FIGS. 18, 19, 20, and 22). Thereby, the droplets scattered downward adhere to the lower surface 152. Therefore, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the droplets scattered downward from adhering to the surrounding structures.

[0240] Furthermore, by folding the transparent laminated film 30 along a pair of first mountain fold portions 121b and a pair of first valley fold portions 122b and along a pair of second mountain fold portions 121a and a pair of second valley fold portions 122a, a side surface 153 that extends rearward from the front surface 150 is formed on the side of the front surface 150. Thereby, the droplets scattered in the direction facing the wearer H and in the left - right direction as viewed from the wearer H adhere to the side surface 153. Therefore, it is possible to suppress the droplets from scattering around from the side of the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to the surrounding structures.

[0241] In the present embodiment, the front surface 150 has a rectangular shape in a front view. Also, the front surface 150 may be a flat surface.

[0242] The upper surface 151 and the lower surface 152 are folded so as to be orthogonal to the front surface 150 in a side view. The upper surface 151 and the lower surface 152 may each be a flat surface.

[0243] The side surface 153 is connected to the front surface 150, the upper surface 151, and the lower surface 152. Among the side surfaces 153, the portions near the upper surface 151 and the lower surface 152 may be three - dimensional curved surfaces, and the other portions may be two - dimensional curved surfaces.

[0244] In addition, in the present embodiment, when the transparent laminated film 30 is folded along a pair of first mountain fold portions 121b or the like, it may be fixed by, for example, a fixing member (not shown). The fixing member may be, for example, a staple pin, an adhesive, a tape, a clip, or the like.

[0245] Also, in the present embodiment, the "front view" means that, when the wearer H wears the face shield 10 such that the portion of the pair of temple portions 21 located in front of the ear hook portion 22 is horizontal, and the second protruding portion 27 abuts against the upper end of the second opening 82 described later, the face shield 10 is viewed from the normal direction of the front surface 150 at the central portion 150a (see FIG. 19) of the front surface 150.

[0246] Also, in the present embodiment as well, for example, by changing the first opening 81 into which the first protruding portion 26 is inserted, the front and rear positions of the shield portion 30A (transparent laminated film 30) can be adjusted.

[0247] Furthermore, in the present embodiment, the opening 80 is formed in the region where the side surface 153 is formed. And as described above, the side surface 153 extends rearward from the front surface 150. Therefore, by inserting the pair of attachment portions 25 into the opening 80 from the back surface (the surface on the wearer H side) side of the transparent laminated film 30, the holding member 20 described above can easily hold the transparent laminated film 30.

[0248] As described above, according to the present embodiment, on the transparent laminated film 30, a pair of first mountain fold portions 121b extending from the upper side 71 and a pair of first valley fold portions 122b extending from the upper side 71 and provided between the pair of first mountain fold portions 121b are formed. Further, the pair of first mountain fold portions 121b extend along the extending direction of the side 73. Furthermore, the pair of first valley fold portions 122b extend along a direction inclined in the extending direction of the side 73 so as to be separated from each other as they go from the upper side 71 side to the lower side 72 side. Then, by folding the transparent laminated film 30 along the pair of first mountain fold portions 121b and the pair of first valley fold portions 122b, a front surface 150 and an upper surface 151 provided above the front surface 150 and folded backward from the front surface 150 are formed. Thereby, the droplets scattered upward adhere to the upper surface 151. For this reason, it is possible to suppress the droplets from scattering around from above the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to surrounding structures. In addition, by forming the upper surface 151, the upper surface 151 can also cover the head of the wearer H, and the wearer H can be effectively protected from droplets scattered from the outside (above).

[0249] Also, according to the present embodiment, on the transparent laminated film 30, a pair of second mountain fold portions 121a extending from the lower side 72 and a pair of second valley fold portions 122a extending from the lower side 72 and provided between the pair of second mountain fold portions 121a are formed. Further, the pair of second mountain fold portions 121a extend along the extending direction of the side 73. Furthermore, the pair of second valley fold portions 122a extend along a direction inclined in the extending direction of the side 73 so as to be separated from each other as they go from the lower side 72 side to the upper side 71 side. Then, by folding the transparent laminated film 30 along the pair of second mountain fold portions 121a and the pair of second valley fold portions 122a, a front surface 150 and a lower surface 152 provided below the front surface 150 and folded backward from the front surface 150 are formed. Thereby, the droplets scattered downward adhere to the lower surface 152. For this reason, it is possible to suppress the droplets from falling below the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to surrounding structures.

[0250] Furthermore, according to the present embodiment, when the transparent laminated film 30 is folded along the pair of first mountain folding portions 121b and the pair of first valley folding portions 122b, and also folded along the pair of second mountain folding portions 121a and the pair of second valley folding portions 122a, a side surface 153 that extends rearward from the front surface 150 is formed on the side of the front surface 150. As a result, droplets scattered in the direction facing the wearer H and the left-right direction as seen from the wearer H adhere to the side surface 153. Therefore, it is possible to suppress the droplets from scattering to the surroundings from the side of the face shield 10. As a result, it is possible to suppress the scattered droplets from adhering to surrounding structures.

Example

[0251] Next, specific examples in the above embodiment will be described.

[0252] (Example 1) First, the transparent laminated film 30 shown in FIG. 9A was produced. At this time, first, the surface antireflection layer 40 was produced. When producing the surface antireflection layer 40, first, as the surface transparent base material layer 42, a triacetyl cellulose film (refractive index 1.49) with a thickness of 60 μm was prepared. Next, a coating liquid for forming a hard coat layer with the following formulation was applied on the triacetyl cellulose film, dried, and irradiated with ultraviolet rays to form a surface hard coat layer 44 with a thickness of 10 μm, a refractive index of 1.54, and a pencil hardness of 2H. Next, a coating liquid for forming a high refractive index layer with the following formulation was applied on this surface hard coat layer 44, dried, and irradiated with ultraviolet rays to form a surface high refractive index layer 46 with a thickness of 150 nm and a refractive index of 1.63. Next, a coating liquid for forming a low refractive index layer with the following formulation was applied on this surface high refractive index layer 46, dried, and irradiated with ultraviolet rays to form a surface low refractive index layer 45 with a thickness of 100 nm and a refractive index of 1.30, and the surface antireflection layer 40 was obtained.

[0253] <Preparation of Coating Liquid for Forming Hard Coat Layer> 1.6 parts by mass of a photoinitiator (Irgacure 127, manufactured by BASF, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methylpropionyl)benzyl]phenyl}-2-methylpropan-1-one), 58.3 parts by mass of a diluting solvent (methyl isobutyl ketone / cyclohexanone = 8 / 2) were put in, and it was stirred until no residue remained in dissolution. 20 parts by mass of a photocurable resin (Beam Set 577, manufactured by Arakawa Chemical Industries, Ltd.) and 20 parts by mass of a high refractive index resin (Poly Lite RX-4800, manufactured by DIC Corporation) were put in and stirred, and it was stirred until no residue remained in dissolution. Finally, 0.1 part by mass of a leveling agent (Seika Beam 10-28(MB), manufactured by Dainichi Seika Kogyo Co., Ltd.) was put in and stirred to prepare a coating liquid for forming a hard coat layer.

[0254] <Preparation of Coating Liquid for Forming High Refractive Index Layer> 0.1 part by mass of a photoinitiator (Irgacure 127, manufactured by BASF), 92.6 parts by mass of a diluting solvent (methyl isobutyl ketone / cyclohexanone / methyl ethyl ketone = 4 / 2 / 4) were put in, and it was stirred until no residue remained in dissolution. 1.25 parts by mass of a photocurable resin (Beam Set 577, manufactured by Arakawa Chemical Industries, Ltd.) was put in and stirred until no residue remained in dissolution. Further, 6 parts by mass of zirconium oxide (MZ-230X, manufactured by Sumitomo Osaka Cement Co., Ltd., solid content 32.5% by mass, average primary particle diameter 15 to 50 nm) and 0.05 part by mass of a leveling agent (Seika Beam 10-28(MB), manufactured by Dainichi Seika Kogyo Co., Ltd.) were respectively put in and stirred to prepare a coating liquid for forming a high refractive index layer.

[0255] <Preparation of Coating Liquid for Forming Low Refractive Index Layer> 0.2 part by mass of a photoinitiator (Irgacure 127, manufactured by BASF), 91.1 parts by mass of a diluting solvent (MIBK / AN = 7 / 3) were put in, and it was stirred until no residue remained in dissolution. 1.0 part by mass of a photocurable resin (KAYARAD-PET-30, manufactured by Nippon Kayaku Co., Ltd.), 7.6 parts by mass of hollow silica particles (solid content 20% by mass, average primary particle diameter 60 nm), and 0.1 part by mass of a leveling agent (Seika Beam 10-28(MB), manufactured by Dainichi Seika Kogyo Co., Ltd.) were respectively put in and stirred to prepare a coating liquid for forming a low refractive index layer.

[0256] Next, the back anti-reflection layer 50 was fabricated. When fabricating the back anti-reflection layer 50, first, as the back transparent substrate layer 52, a triacetyl cellulose film (refractive index 1.49) with a thickness of 60 μm was prepared. Next, the coating liquid for forming the hard coat layer with the above formulation was applied onto the triacetyl cellulose film, dried, and irradiated with ultraviolet rays to form a back hard coat layer 54 with a thickness of 10 μm, a refractive index of 1.54, and a pencil hardness of 2H. Then, the coating liquid for forming the high refractive index layer with the above formulation was applied onto this back hard coat layer 54, dried, and irradiated with ultraviolet rays to form a back high refractive index layer 56 with a thickness of 150 nm and a refractive index of 1.63. Then, the coating liquid for forming the low refractive index layer with the above formulation was applied onto this back high refractive index layer 56, dried, and irradiated with ultraviolet rays to form a back low refractive index layer 55 with a thickness of 100 nm and a refractive index of 1.30, thereby obtaining the back anti-reflection layer 50.

[0257] Next, the front anti-reflection layer 40 and the back anti-reflection layer 50 were adhered to each other via a transparent adhesive layer (manufactured by Panac Co., Ltd., Panaclean Series PD-S1, thickness 25 μm) to fabricate a transparent laminated film 30. The layer structure of the obtained transparent laminated film 30 is as follows. Low Refractive Index / High Refractive Index / Hard Coat / TAC / Adhesive / TAC / Hard Coat / High Refractive Index / Low Refractive Index In the above, "Low Refractive Index" means the front low refractive index layer or the back low refractive index layer (the same applies hereinafter). Also, "High Refractive Index" means the front high refractive index layer or the back high refractive index layer (the same applies hereinafter). Also, "Hard Coat" means the front hard coat layer or the back hard coat layer (the same applies hereinafter). Also, "TAC" means the triacetyl cellulose film (the same applies hereinafter). Furthermore, "Adhesive" means the transparent adhesive layer.

[0258] (1) Reflectance Measurement Test Next, a reflectance measurement test was conducted on the transparent laminated film 30.

[0259] At this time, first, a sample with a size of 20 mm × 20 mm was cut out from the obtained transparent laminated film 30. Next, a black resin plate was adhered to the back surface of the sample. Then, light was irradiated onto the surface of the sample at an incident angle of 5°. At this time, the light was irradiated onto the surface of the sample with the wavelength of the light being 550 nm. Then, using a spectrophotometer (manufactured by JASCO Corporation, V-7100), the reflection spectrum of the light was measured, and the reflectance of the light was calculated.

[0260] (2) Visibility evaluation test In addition, a visibility evaluation test of the face shield 10 was carried out.

[0261] At this time, first, using the obtained transparent laminated film 30, the face shield 10 shown in FIG. 12 was manufactured. Next, five subjects were randomly selected from men and women aged 22 or older. Then, the visibility of the expressions of the five subjects wearing the face shield 10 was confirmed. At this time, in a general indoor environment illuminated by fluorescent lamps, the expressions of the subjects were observed from a distance of about 1 m to 2 m away from the subjects. In addition, the observer observed the expressions of the subjects while moving about 20° to the left and right around the surface 301 of the face shield 10 from a state facing the subjects directly.

[0262] (3) Droplet prevention functionality evaluation test In addition, a droplet prevention functionality evaluation test of the transparent laminated film 30 was carried out. In the droplet prevention functionality evaluation test, an external droplet prevention function of protecting the wearer from droplets scattering from the outside and an internal droplet prevention function of preventing droplets scattered from the wearer from scattering around were evaluated.

[0263] At this time, first, a 30 ml alcohol spray bottle was filled with deionized water. In addition, a dummy with a through hole formed from the back of the head to the mouth was prepared. Then, the face shield 10 was worn on the head of the dummy. Also, a coarse particle counter (manufactured by Omron Corporation, ZN-PD-S (product name)) was prepared.

[0264] Evaluation of external droplet prevention function Next, a tube was attached to the measurement section (i.e., the suction port) of the coarse particle counter. Then, the tube was installed such that the tip of the tube was positioned near the mouth of the dummy between the dummy and the shield portion 30A.

[0265] Next, deionized water filled in the spray was sprayed from a position where the horizontal position was 1 m away from the face shield 10 and the vertical position was the same as the vertical position of the upper side 71 of the transparent laminated film 30 constituting the shield portion 30A. Then, the number of floating ink particles was counted by the coarse particle counter. At this time, the number of particles having a particle size of 5 μm or more and 50 μm or less of the ink particles was counted.

[0266] Evaluation of internal splash prevention function Next, two coarse particle counters were installed. At this time, first, one coarse particle counter was installed such that the measurement section of one coarse particle counter was disposed directly below the shield portion 30A. Also, the other coarse particle counter was installed such that the measurement section of the other coarse particle counter was disposed at a position 30 cm forward from the measurement section of one coarse particle counter.

[0267] Next, deionized water filled in the spray was sprayed from the through hole extending from the back of the head to the mouth of the dummy. Then, the number of floating ink particles was counted by the coarse particle counter. At this time, the number of particles having a particle size of 5 μm or more and 50 μm or less of the ink particles was counted.

[0268] (Example 2) A reflectance measurement test, a visibility evaluation test, and a splash prevention functionality evaluation test were conducted in the same manner as in Example 1, except that the face shield 10 shown in FIG. 18 was fabricated.

[0269] (Comparative Example 1) A splash prevention functionality evaluation test was conducted in the same manner as in Example 1, except that the face shield was not attached to the dummy.

[0270] (Comparative Example 2) A commercially available face shield (manufactured by Yamamoto Optical Co., Ltd., YF-850L (product name)) containing a transparent film was used, and reflectance measurement tests, visibility evaluation tests, and droplet prevention functionality evaluation tests were conducted in the same manner as in Example 1, except for this.

[0271] (Comparative Example 3) A commercially available face shield (manufactured by Sharp Corporation, FG-F10M (product name)) containing a transparent film was used, and reflectance measurement tests, visibility evaluation tests, and droplet prevention functionality evaluation tests were conducted in the same manner as in Example 1, except for this.

[0272] (Comparative Example 4) A commercially available face shield (manufactured by Miyamoto Co., Ltd., halo (product name)) containing a transparent film was used, and reflectance measurement tests, visibility evaluation tests, and droplet prevention functionality evaluation tests were conducted in the same manner as in Example 1, except for this.

[0273] The above results are shown in Table 1.

[0274]

Table 1

[0275] In the visibility column of Table 1 above, "○" means that the reflection of the wearer on the transparent laminated film or transparent film (hereinafter simply referred to as the transparent laminated film, etc.) cannot be seen, and the hearing result was that there was no impression of wearing a face shield. Also, "×" means that the reflection of the wearer on the transparent laminated film, etc. can be seen, which hinders the work, and there is an impression of wearing a face shield, and the hearing result was that a sense of fatigue was felt.

[0276] As a result, as shown in Table 1, in the transparent films of the face shields according to Comparative Example 2 and Comparative Example 3, the reflectance of light with a wavelength of 550 nm was 0.4% and 0.5%, respectively. Further, in the transparent film of the face shield according to Comparative Example 4, the reflectance of light with a wavelength of 550 nm was 8.0%. On the other hand, in the transparent laminated films of the face shields according to Example 1 and Example 2, the reflectance of light with a wavelength of 550 nm was 0.2%. Thus, in the face shields according to Example 1 and Example 2, the reflectance of light with a wavelength of 550 nm could be reduced.

[0277] Also, as shown in Table 1, in the visibility evaluation test, in the transparent film according to Comparative Example 4, the reflection of the wearer on the transparent film could be seen, which hindered the work and gave the impression of wearing a face shield, resulting in a hearing result of feeling fatigue. On the other hand, in Example 1 and Example 2, the hearing results were that the reflection of the wearer on the transparent laminated film 30 could not be seen and there was no impression of wearing a face shield. Thus, in the transparent laminated film 30 according to Example 1 and Example 2, the reflection of the wearer on the transparent laminated film 30 could be reduced, and the wearer wearing the face shield 10 could be prevented from feeling fatigue.

[0278] Also, as shown in Table 1, in the splash prevention functionality evaluation test, in the face shields according to Comparative Example 2 to Comparative Example 4, when deionized water was sprayed from the outside, the number of particles floating near the mouth of the dummy was about 100 or more. On the other hand, in the face shield 10 according to Example 1, when deionized water was sprayed from the outside, the number of particles floating near the mouth of the dummy was 19. Further, in the face shield 10 according to Example 2, when deionized water was sprayed from the outside, the number of particles floating near the mouth of the dummy was 10. Thus, it was found that the face shields 10 according to Example 1 and Example 2 could effectively protect the wearer from splashes scattered from the outside.

[0279] Also, as shown in Table 1, in the droplet prevention functionality evaluation test, for the face shields according to Comparative Examples 2 to 4, the number of particles that fell directly below the face shield was 800 or more. In contrast, for the face shield 10 according to Example 1, the number of particles that fell directly below the face shield 10 was 62. Also, for the face shield 10 according to Example 2, the number of particles that fell directly below the face shield 10 was 35. Thus, it was found that the face shields 10 according to Example 1 and Example 2 can effectively suppress the scattering of droplets scattered from the wearer to the surroundings.

[0280] Furthermore, as shown in Table 1, in the droplet prevention functionality evaluation test, even for the face shields 10 according to Example 1 and Example 2, similar to the face shields according to Comparative Examples 2 to 4, the number of particles that fell 30 cm in front of the face shield 10 was 3 or less. Particularly, for the face shield 10 according to Example 2, the number of particles that fell 30 cm in front of the face shield 10 was 0. Therefore, it was found that even in the face shield 10 in which the first lower curved surface 96a and the first upper curved surface 96b are formed, it is possible to suppress the scattering of droplets of a specific size in front of the wearer H of the face shield 10.

[0281] It is also possible to appropriately combine a plurality of components disclosed in each of the above embodiments and each modification as needed. Alternatively, some components may be deleted from all the components shown in each of the above embodiments and each modification.

Explanation of Reference Numerals

[0282] 10 Face shield 20 Holding member 25 Mounting portion 30 Transparent laminated film 71 Upper side 72 Lower side 73 Side 74a First cut portion 74b Second cut portion 75a First engaging part 75b Second engaging part 76a First locking part 76b Second locking part 77a First curved surface 77b Second curved surface 77c Third curved surface 80 Opening 91a First lower panel 91b First upper panel 92a Second lower panel 92b Second upper panel 93a Third lower panel 93b Third upper panel 94a Fourth lower panel 94b Fourth upper panel 95a Lower fixing panel 95b Upper fixing panel 96a First lower curved surface 96b First upper curved surface 97a Second lower curved surface 97b Second upper curved surface 98 Intermediate curved surface 101a First lower cut part 101b First upper cut part 102a Second lower cut part 102b Second upper cut part 103a Third lower cut part 103b Third upper cut part 104a Fourth lower cut part 104b Fourth upper cut part 105a Fifth lower cut part 105b Fifth upper cut part 106a Sixth lower cut part 106b Sixth upper cut part 121a Second mountain fold part 121b First mountain fold part 122a Second valley fold part 122b First valley fold part 150 Front 151 Top 152 Bottom 153 Side H Wearer F Face

Claims

1. In a face shield for protecting the face of a wearer, a holding member to be worn by the wearer, and a transparent laminated film attached to the holding member and covering at least a part of the face of the wearer, the transparent laminated film has a rectangular shape having an upper side, a lower side facing the upper side, and a pair of side sides extending between the upper side and the lower side, a plurality of first cut portions are formed at least on the lower side, a first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion, by locking the first engaging portion to the first locking portion, a first curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side, In a front view, the width of the first curved surface gradually narrows downward, a face shield.

2. a plurality of second cut portions are formed on the upper side, a second engaging portion is formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion is formed on the other side of the second cut portion, By locking the second engaging portion to the second locking portion, a second curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the upper side, the face shield is curved, the face shield according to claim 1.

3. By locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, a third curved surface that curves convexly toward the side away from the wearer is formed between the first curved surface and the second curved surface, the face shield according to claim 2.

4. The third curved surface has a linear shape in a vertical cross section, the face shield according to claim 3.

5. The holding member includes a pair of attachment portions for holding the transparent laminated film, Openings into which the attachment portions are inserted are formed near the pair of side sides of the transparent laminated film, the face shield according to any one of claims 1 to 4.

6. The holding member holds the transparent laminated film so as to be movable in the vertical direction, the face shield according to any one of claims 1 to 5.

7. The light reflectance of the transparent laminated film is 1.0% or less, the face shield according to any one of claims 1 to 6.

8. A transparent laminated film used for a face shield that protects the face of the wearer, having a rectangular shape with an upper side, a lower side facing the upper side, and a pair of side edges extending between the upper side and the lower side, wherein a plurality of first cut portions are formed at least on the lower side, a first engaging portion is formed on one side of the first cut portion, and a first locking portion for locking the first engaging portion is formed on the other side of the first cut portion, by locking the first engaging portion to the first locking portion, a first curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the lower side, In a front view, the width of the first curved surface gradually narrows downward. A transparent laminated film.

9. a plurality of second cut portions are formed on the upper side, a second engaging portion is formed on one side of the second cut portion, and a second locking portion for locking the second engaging portion is formed on the other side of the second cut portion, The transparent laminated film according to claim 8, wherein by locking the second engaging portion to the second locking portion, a second curved surface that curves convexly toward the side away from the wearer is formed in the vicinity of the upper side.

10. By locking the first engaging portion to the first locking portion and locking the second engaging portion to the second locking portion, a third curved surface that curves convexly toward the side away from the wearer is formed between the first curved surface and the second curved surface. The transparent laminated film according to claim 9.

11. The transparent laminated film according to claim 10, wherein the third curved surface has a linear shape in a vertical cross section.

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