Film laminate, method for manufacturing film laminate, protective equipment, and method for manufacturing protective equipment

Abstract

To provide a film laminate capable of providing a sufficient effect of sterilization treatment and having no risk of damage to a film surface structure.SOLUTION: A film laminate 1 includes: a plurality of film members 2 peelably laminated; and a columnar projection members 5 projecting in the laminating direction of the film members 2 and holding the film members 2 with a predetermined interval. An outer peripheral surface of the projection member 5 is provided with an engagement part with which the film member 2 engages with a predetermined interval. The film member 2 includes an insertion hole 4 through which the projection member 5 is inserted in an insertable and detachable manner. The projection member 5 is inserted through the insertion hole 4 and the film member 2 engages with the engagement part, so that the film members 2 are held and laminated with a predetermined interval.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present technology relates to a film laminate in which a plurality of film-like members are laminated at predetermined intervals, a method for manufacturing a film laminate, a protective device using the film laminate, and a method for manufacturing a protective device. Regarding. [Background technology]

[0002] Personal protective equipment (PPE) is widely used as a means of preventing occupational infection among healthcare workers. In particular, face shields and protective clothing to prevent exposure to blood and body fluids are used during examinations and surgeries, and are useful in preventing occupational infection with blood-borne pathogens (HIV, HBV, HCV) and coronaviruses (SARS-CoV-2, etc.).

[0003] However, the surface of this type of protective equipment can become contaminated with blood or other bodily fluids splashed from the patient during an examination or surgery. In such an environment where contaminants are likely to fly, it is necessary to quickly restore visibility while avoiding contact with the contaminants.

[0004] Additionally, helmet shields used in two-wheeled and four-wheeled automobile auto races, and painter's safety glasses used during painting work, often have the same problem of their surfaces becoming dirty and obstructing visibility.

[0005] To solve these problems, a conventional approach is to laminate multiple easily removable protective films onto the surface of a helmet shield or painter's safety glasses, and when visibility is impaired by dirt, the topmost protective film is peeled off along with the dirt to restore visibility. Regarding this type of technology, for example, Patent Document 1 discloses a protective device for the helmet shield, in which multiple sheet-like protective covers, i.e., disposable visors, are attached to cover the helmet shield.

[0006] However, if the protector has a simple laminated structure of protective films as described above, reflection occurs at the interfaces between the laminated layers, and there are also problems such as a decrease in transmittance simply as the number of laminated layers increases.

[0007] On the other hand, optical elements with moth-eye structures having pitches equal to or smaller than the wavelength of visible light and protective equipment that utilizes the low reflectance properties of films to provide excellent visibility have also been proposed (Patent Document 2).

[0008] The laminate described in Patent Document 2 includes a plurality of film-like members, each having a moth-eye structure formed of irregularities with a pitch equal to or less than the wavelength of visible light on at least one surface of a substrate, as shown in Figures 21 and 22. The film-like members are fixed at least at their ends via an adhesive layer, allowing them to be peelably laminated. In the laminate shown in Figure 21, the adhesive layer is provided only on the ends of the film-like members. In the laminate shown in Figure 22, the adhesive layer is provided over the entire surface of the film-like members.

[0009] By laminating film-like members having moth-eye structures, it is possible to prevent an increase in reflectivity and a decrease in transmittance, thereby ensuring visibility. Furthermore, when the surface of the laminate is contaminated with blood or bodily fluids, or when visibility is obstructed by dirt, the topmost film-like member can be peeled off together with the dirt, restoring visibility. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-192322 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-57317 Summary of the Invention [Problem to be solved by the invention]

[0011] When a protective device having such laminated film-like members is used for medical purposes, the surface of each film-like member is sterilized by gas sterilization, etc. Then, by peeling off the contaminated top film-like member, a new sterile surface can be exposed on the outermost surface.

[0012] However, in protective equipment that uses a laminate in which film-like members are laminated and fixed with an adhesive layer, when sterilization treatment using gas or the like is performed, the surfaces of the film-like members are not exposed in the areas joined by the adhesive layer, so the sterilizing gas cannot flow in, and the sterilization treatment cannot be performed.

[0013] In the configuration shown in Figure 21, the central part of the film without the adhesive layer can be sterilized, but the outer edge of the film where the adhesive layer is provided cannot be sterilized. Also, even in the configuration shown in Figure 21, if the adhesive layer covers the entire outer periphery of the film, the front and back surfaces of the film surrounded by the adhesive layer will not be sterilized. In the configuration shown in Figure 22, only the top and back surfaces of the laminated film are sterilized, and the front and back surfaces of the film where the adhesive layer is interposed cannot be sterilized.

[0014] Therefore, when the contaminated top layer of film-like material is peeled off, film-like material that has not been partially sterilized or has not been sterilized entirely is exposed, and the full effect of the sterilization treatment cannot be obtained.

[0015] Furthermore, in the case of a transparent laminate having a moth-eye structure on the film surface, when a laminate design using an adhesive is used, there is a risk that the moth-eye structure may be destroyed when each film-like component is peeled off, depending on the adhesive strength.

[0016] Therefore, the present technology aims to provide a film laminate, a method for manufacturing a film laminate, a protective device, and a method for manufacturing a protective device that can obtain a sufficient effect of sterilization treatment without risking damage to the film surface structure. [Means for solving the problem]

[0017] In order to solve the above-mentioned problems, the film laminate of the present technology comprises a plurality of film-like members stacked in a peelable manner, and columnar protrusion members that protrude in the stacking direction of the film-like members and hold the film-like members at a predetermined interval, and the outer peripheral surface of the protrusion members is provided with locking portions that lock the film-like members at the predetermined interval, and the film-like members have insertion holes through which the protrusion members are inserted and removed, and the protrusion members are inserted into the insertion holes and the film-like members are locked to the locking portions, thereby stacking the film-like members and holding them at a predetermined interval.

[0018] In addition, the method for manufacturing a film laminate according to the present technology includes the steps of forming a film-like member having an insertion hole, forming a protrusion member having a locking portion to which the film-like member is locked, and inserting the protrusion member into the insertion hole of the film-like member, locking the film-like member in the locking portion, and stacking the film-like members while holding them at a predetermined interval.

[0019] Furthermore, the protective equipment according to the present technology is a protective equipment in which a film laminate is worn on the face or around the eyes of a user, and the film laminate is as described above.

[0020] In addition, a manufacturing method for protective equipment according to the present technology is a manufacturing method for protective equipment in which a film laminate is attached to the face or around the eyes of a user, and includes a step of forming the film laminate and a step of attaching the film laminate to the protective equipment, and the film laminate is as described above. [Effects of the Invention]

[0021] According to this technology, the film laminate allows the entire front and back surfaces of each film-like member to be exposed to sterilization gas, and when a film-like member is peeled off, a film-like member whose entire front and back surfaces have always been sterilized can be exposed. [Brief explanation of the drawings]

[0022] [Figure 1]FIG. 1 is an exploded perspective view of a film laminate to which the present technology is applied. [Figure 2] Figure 2 is a side view showing a protrusion member, where (A) shows one with a cylindrical protrusion, (B) shows one with a ring-shaped protrusion, (C) shows one with a spherical protrusion, (D) shows one in which the diameter of the protrusion gradually increases from the tip to the base, and (E) shows one in which a groove is recessed in the circumferential direction. [Figure 3] FIG. 3 is a side view showing an example of dimensions of a protruding member having a cylindrical convex portion formed thereon. [Figure 4] FIG. 4 is a side view showing a state in which a film-like member is engaged with a protruding member provided with a ring-shaped convex portion. [Figure 5] FIG. 5 is a diagram showing an example of a configuration in which four insertion holes are arranged at equal intervals along the upper side of a substantially rectangular film-like member. [Figure 6] FIG. 6 is a perspective view showing slits formed around the insertion hole. [Figure 7] FIG. 7 is a cross-sectional view of a film-like member constituting a film laminate to which the present technology is applied. [Figure 8] FIG. 8 is a cross-sectional view of another film-like member constituting a film laminate to which the present technology is applied. [Figure 9] FIG. 9 is a perspective view of another film-like member constituting a film laminate to which the present technology is applied. [Figure 10] FIG. 10 is a perspective view of a transfer roll master on which an anti-reflection layer pattern made of a moth-eye structure is formed. [Figure 11] Figure 11 is a cross-sectional view showing the process of forming an anti-reflective layer consisting of moth-eye structures. (A) shows the state in which the surface of the substrate coated with the transfer material is in close contact with the roll master. (B) shows a film-like member with moth-eye structures transferred to one side. (C) shows the state in which the transfer material is applied to the other side of the film-like member with moth-eye structures transferred to one side and the other side is in close contact with the roll master. (D) shows a film-like member with moth-eye structures transferred to both sides. [Figure 12] FIG. 12 is a perspective view showing the appearance of a medical protective suit as an example of a protective device. [Figure 13] FIG. 13 is a cross-sectional view showing an example of the structure of a film laminate. [Figure 14] FIG. 14 is a cross-sectional view showing another example of the structure of the film laminate. [Figure 15] FIG. 15 is a cross-sectional view showing an example of a process for attaching the film laminate to a protector. [Figure 16] FIG. 16 is a cross-sectional view showing another example of a process for attaching a film laminate to a protector. [Figure 17] FIG. 17 is a cross-sectional view showing another example of a process for attaching a film laminate to a protector. [Figure 18] FIG. 18 is a diagram illustrating the configuration of a film laminate sample in which film-like members are laminated with hook members. [Figure 19] FIG. 19 is a diagram illustrating the configuration of a film laminate sample in which film-like members are laminated by applying a pressure-sensitive adhesive to the entire surface, where (A) is a plan view and (B) is a cross-sectional view. [Figure 20] FIG. 20 shows a film laminate sample in which a pressure-sensitive adhesive is provided on one edge of a film-like material and laminated, (A) being a plan view and (B) being a cross-sectional view. [Figure 21] FIG. 21 is a cross-sectional view showing a laminate in which a plurality of film-like members are stacked with adhesive layers provided at the ends of the film-like members. [Figure 22] FIG. 22 is a cross-sectional view showing a laminate in which a plurality of film-like members are stacked with adhesive layers provided on the entire surfaces of the film-like members. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, a film laminate, a manufacturing method for a film laminate, a protective equipment, and a manufacturing method for a protective equipment to which the present technology is applied will be described in detail with reference to the drawings. It should be noted that the present technology is not limited to the following embodiments, and various modifications are possible within the scope of the present technology. Furthermore, the drawings are schematic, and the ratios of the dimensions may differ from the actual ones. Specific dimensions should be determined with reference to the following explanation. It should be noted that the drawings also include portions in which the dimensional relationships and ratios differ from one another.

[0024] [Film laminate] As shown in Fig. 1, a film laminate 1 to which the present technology is applied includes a plurality of film-like members 2 that are peelably stacked, and columnar protruding members 5 that protrude in the stacking direction of the film-like members 2 and hold the film-like members 2 at predetermined intervals. As shown in Fig. 2, the outer peripheral surface of the protruding members 5 is provided with locking portions that lock the film-like members 2 at the predetermined intervals. The film-like members 2 have insertion holes 4 through which the protruding members 5 are removably inserted. When the protruding members 5 are inserted through the insertion holes 4, the film-like members 2 are locked by the locking portions. As a result, the film-like members 2 are stacked while being held at predetermined intervals.

[0025] The film-like member 2 is a flexible, transparent sheet. Each of the multiple film-like members 2 has an insertion hole 4 formed therein, and the multiple film-like members 2 are stacked by inserting the protruding members 5 into the insertion holes 4. Each film-like member 2 is locked to a locking portion provided on the outer circumferential surface of the protruding members 5 and held at a predetermined interval. This allows the multiple film-like members 2 to be stacked at a predetermined distance apart, and the entire front and back surfaces of each film-like member 2 are exposed.

[0026] Therefore, the film laminate 1 allows the entire front and back surfaces of each film-like member 2 to be exposed to sterilization gas, and when a film-like member 2 is peeled off, the film-like member 2 can always be exposed with its entire front and back surfaces sterilized.

[0027] In medical applications, if the surface becomes contaminated with blood or bodily fluids splashed by a patient during an examination or surgery, the top film member 2 can be peeled off to quickly restore visibility while avoiding contact with contaminants. In this case, the entire surface of the film member 2 revealed by peeling the film laminate 1 is sterilized, thereby reducing the risk of infection for patients, examinees, other medical professionals, etc. Furthermore, because the entire back surface of the peeled film member 2 is also sterilized, unsterilized areas are not exposed to patients, examinees, medical professionals, etc. when peeling or disposing of the film laminate 1.

[0028] [Protruding parts] The protruding members 5 supporting the film-like members 2 are columnar and, as shown in FIG. 1, are erected near both ends of a rectangular plate-like base 7, protruding in the stacking direction of the film-like members 2. The protruding members 5 can be molded from known engineering plastics or the like. Known molding methods such as mold molding and cutting can be used. The protruding members 5 can be formed integrally with the base 7, or formed as separate parts and then connected by adhesive or the like.

[0029] [Latching part] Furthermore, the protruding member 5 has locking portions formed on its outer circumferential surface at predetermined intervals to lock the film-like member 2. The locking portions are formed as a plurality of convex portions 9 that protrude in the circumferential direction of the protruding member 5, and the insertion holes 4 of the film-like member 2 that have passed through the protruding member 5 are locked between the convex portions 9. This restricts the movement of the film-like member 2 in the erection direction of the protruding member 5 and holds it at predetermined intervals.

[0030] The shape of the protrusions 9 is not particularly limited as long as it can lock the film-like member 2, and may be cylindrical, for example, as shown in Fig. 2(A). The locking portion has a plurality of cylindrical protrusions 9a provided at predetermined intervals, and can hold the film-like member 2 by locking the film-like member 2 between the protrusions 9a. The spacing between the film-like members 2 is determined by the width of the protrusions 9a in the erect direction of the protruding member 5.

[0031] FIG. 3 is a side view showing an example of dimensions of a protruding member 5 having protruding portions 9a formed thereon. In the protruding member 5 shown in FIG. 3, film-like members 2 each having a thickness of 0.5 mm are stacked at intervals of 1.5 mm. As shown in FIG. 3, the protruding portions 9a may also be ring-shaped with arc-shaped sides. This allows for smooth insertion and removal of the film-like member 2 and prevents damage during insertion. Furthermore, the rounded sides of the locking portion enhance safety for the user and other members, and create a sense of security.

[0032] 2(B), the convex portion 9 may be ring-shaped. The engaging portion may have multiple ring-shaped convex portions 9b to restrict movement of the protruding member 5 toward the base or tip of the protruding member 5, or may be engaged between two convex portions 9b to restrict movement. In the example shown in FIG. 2(B), when three film-like members 2 are held, the convex portion 9b formed at the base end of the protruding member 5 restricts movement of the bottom film-like member 2 toward the tip of the protruding member 5, the convex portion 9b formed at the tip end of the protruding member 5 restricts movement of the top film-like member 2 toward the base of the protruding member 5, and a pair of convex portions 9b provided in the middle restricts movement of the middle film-like member 2 toward the base and tip of the protruding member 5. The spacing between the film-like members 2 is determined by the spacing between the convex portions 9b in the erect direction of the protruding members 5 (see FIG. 4).

[0033] Alternatively, as shown in FIG. 2(C), the shape of the convex portion 9 may be spherical. The locking portion is provided with a plurality of spherical convex portions 9c, and the film-like member 2 can be held by locking the film-like member 2 between the convex portions 9c. The spacing between the film-like members 2 is determined by the diameter of the convex portions 9c and the spacing between the convex portions 9c in the erect direction of the protruding member 5. By providing spherical convex portions 9c, the film-like member 2 can be inserted and removed smoothly.

[0034] The spacing between each film-like member 2 is not particularly limited as long as it prevents the film-like members 2 from sticking together and allows for processing such as exposing the entire front and back surfaces to sterilization gas, and is preferably 0.1 mm or more. Furthermore, since too wide a spacing increases the risk of foreign matter being mixed in when using the protective equipment 21, a spacing of, for example, 5 mm or less is preferable, and it is even more preferable to make it as narrow as possible. Furthermore, the spacing between each film-like member 2 may be constant or may vary. For example, the spacing between the topmost film-like member 2 and the second film-like member 2 may be different from the spacing between the second film-like member 2 and the bottommost film-like member 2.

[0035] Furthermore, the protruding member 5 may be provided with a spherical protrusion 9c at the tip. By providing a spherical protrusion 9c at the tip, the film-like member 2 can be inserted and removed smoothly and damage during insertion can be prevented. Furthermore, by making the tip of the protruding member 5 rounded, safety for the user and other members can be increased, and a sense of security can be created.

[0036] 2(D), the protrusion member 5 may be provided with a plurality of protrusions 9, the diameter of which gradually increases from the protrusion 9 at the tip end to the protrusion 9 at the base end, and the insertion hole 4 provided in the film-like member 2 may have an opening diameter that corresponds to the diameter of the protrusion 9 at the locking position of the film-like member 2. This makes it possible to prevent the topmost film-like member 2 and the intermediate film-like member 2 from moving toward the base from the predetermined locking position. Furthermore, when the stacking order of the film-like members 2 is fixed, it is possible to prevent at least the topmost film-like member 2 and the intermediate film-like member 2 from being locked toward the base from the predetermined locking position.

[0037] Note that, instead of providing the protrusions 9, the locking portions may be formed as a plurality of grooves 9d recessed in the circumferential direction of the protruding member 5, as shown in Fig. 2(E), so that the periphery of the insertion hole 4 of the film-like member 2 through which the protrusion member 5 is inserted is locked by the grooves 9d. Also, the locking portions may be configured by appropriately combining the above-mentioned protrusions 9a to 9c and grooves 9d.

[0038] [Film-like material] The film-like member 2 is a flexible, transparent sheet. There are no particular limitations on the shape of the film-like member 2, and it can be appropriately selected depending on the protective equipment 21 to be used, such as a substantially rectangular shape as shown in Fig. 1. Each of the multiple film-like members 2 has an insertion hole 4 formed therein, through which the protruding member 5 passes and which is locked by the locking portion.

[0039] The protrusion members 5 and the insertion holes 4 are positioned and numbered so that they can stably hold the film-like member 2 at a predetermined distance, do not interfere with the user's field of vision within the film-like member 2 during use, and facilitate peeling. From this perspective, the insertion holes 4 are preferably formed on the outer edge of the film-like member 2, and are preferably formed on both ends of the upper edge of the film-like member 2, which is formed in a substantially rectangular shape, as shown in FIG. 1, or are preferably arranged in multiple (e.g., four) holes at equal intervals along the upper edge of the substantially rectangular film-like member 2, as shown in FIG. 5. The insertion holes 4 may also be formed on the lower edge or side edge of the substantially rectangular film-like member 2, in addition to the upper edge, and may be formed or arranged in multiple locations at one or more of these locations. The protrusion members 5 are also formed and arranged according to the positions of the insertion holes 4. The positions and number of the protrusion members 5 and the insertion holes 4 are not limited to those described above and may be appropriately determined depending on the wearing configuration and use of the protector 21 and the film laminate 1.

[0040] 6, the film-like member 2 may have one or more slits 10 formed around the insertion hole 4. Since the locking portion of the protruding member 5 is press-fitted into the insertion hole 4 of the film-like member 2, forming the slits 10 allows the film-like member 2 to be inserted and removed more smoothly.

[0041] The film-like member 2 may have a peeling tab 20 on its outer edge. The tab 20 is a portion that is gripped when peeling off the film-like member 2. It is preferable that the film-like member 2 has a function to identify the film-like member 2 to be peeled off, provided to the tab 20. This can encourage peeling from the topmost film-like member 2, and can prevent the film-like member 2 in the middle layer from being accidentally peeled off together with the film-like member 2 above it.

[0042] One way to identify the topmost film-like member 2 is to gradually reduce the size of the tabs 20 from the topmost layer onwards. That is, as shown in Fig. 1, by forming the tab 20 formed on the topmost film-like member 2 to be larger than the tabs 20 of the film-like members 2 in the layers below it so that the tabs of the lower film-like members 2 are hidden, it becomes easier to always grasp only the tab 20 of the topmost film-like member 2 and to prevent mistakenly grasping the tabs 20 of the lower film-like members 2.

[0043] Furthermore, for example, the position at which the tab 20 is formed may be different for each film-like member 2. For example, the topmost film-like member 2 has the tab 20 formed on the right edge when viewed from the front, and the middle film-like member 2 has the tab 20 formed on the left edge when viewed from the front. This allows the topmost film-like member 2 to be peeled off by first grasping the tab 20 on the right edge, preventing the middle film-like member 2 from being accidentally peeled off as well.

[0044] Other methods for identification include changing the color of the tab 20 for each film-like member 2, or processing physical features such as uneven marks, openings, or notches. The above-mentioned identification means may also be combined.

[0045] In the film laminate 1, the film-like members 2 constituting each layer may all be the same, or may have different functions or optical properties. This is selected appropriately depending on the intended use of the protective equipment 21 to which the film laminate 1 is applied. Furthermore, the order of lamination when film-like members 2 with different functions or properties are laminated is also set appropriately depending on the intended use of the protective equipment 21.

[0046] [Moth-eye structure] Here, the film-like member 2 is preferably an optical element having anti-reflection properties, in which a plurality of structures are provided on at least one surface of a flexible transparent substrate at a pitch equal to or less than the wavelength of visible light. Hereinafter, this fine concave-convex structure having anti-reflection properties will be referred to as a "moth-eye structure." Note that by using the film-like member 2 having the moth-eye structures, the film laminate 1 does not impair visibility even when the film-like member 2 is laminated.

[0047] As shown in Fig. 7, the film-like member 2 has structures 12 provided on both sides of a base 11 via a base layer 13 at a pitch equal to or less than the wavelength of visible light, thereby providing anti-reflection properties on both the opposing front and back surfaces. The multiple structures 12 are regularly arranged in multiple rows on the base layer 13 on the front and back surfaces of the base 11. In other words, the front and back surfaces of the film-like member 2 have an uneven shape due to the moth-eye structure made up of the multiple structures 12. Note that the film-like member 2 may have structures 12 provided only on the front surface of the base 11.

[0048] By providing such an uneven shape on the front and back surfaces of the film-like member 2, the film-like member 2 can impart an optical adjustment function with little wavelength dependency and excellent visibility to the protector 21 to which the film laminate 1 is attached. In other words, this can contribute to realizing a protector 21 with excellent visibility.

[0049] Here, "optical adjustment function" refers to the optical adjustment function of transmission characteristics and reflection characteristics. The film-like member 2 as an optical element is transparent to, for example, visible light, and its refractive index n is preferably in the range of 1.30 or more and 2.00 or less, more preferably 1.34 or more and 2.00 or less. However, it is not limited to this.

[0050] The refractive index of the structures 12 is preferably the same as or approximately the same as the refractive index of the substrate 11. This is because it is possible to suppress internal reflection and improve contrast.

[0051] 7 shows an example in which structures 12 are formed on the front and back surfaces of substrate 11 via base layer 13, and base layer 13 serves to improve the adhesion of structures 12 to substrate 11. In this case, base layer 13 is an optical layer that is integrally molded with structures 12 on the bottom surface side of structures 12, has transparency, and may be formed by curing the same energy ray-curable resin composition as structures 12, etc.

[0052] Furthermore, as shown in FIG. 8, the film laminate 1 may not have a base layer 13, and may use a film-like member 2 in which a moth-eye structure made up of a plurality of structures 12 is formed directly on a substrate 11.

[0053] Furthermore, the film laminate 1 may use a film-like member 2 in which a substrate and a structure are integrally formed, as shown in Fig. 9. In the film-like member 2 shown in Fig. 9, structures 12 are integrally formed on both sides of a substrate 11.

[0054] [Base] Here, the base 11 will be further described. The base 11 is, for example, a transparent substrate having transparency. Examples of materials for the base 11 include those containing a transparent plastic material as a main component, but the base 11 is not particularly limited to these materials.

[0055] When a plastic material is used for the substrate 11, a primer layer (not shown) may be further provided by surface treatment to further improve the surface energy, coatability, slipperiness, flatness, etc. of the surface of the plastic material. Examples of this primer layer include organoalkoxymetal compounds, polyester, acrylic-modified polyester, polyurethane, etc. Furthermore, to obtain the same effect as providing a primer layer, the surface of the substrate 11 may be subjected to a corona discharge treatment, UV irradiation treatment, etc.

[0056] When the substrate 11 is a plastic film, the substrate 11 can be obtained, for example, by stretching the above-mentioned resin or diluting it in a solvent, forming it into a film, and drying it. The thickness of the substrate 11 is preferably selected appropriately depending on the application of the film-like member 2, and may be, for example, approximately 10 μm or more and 500 μm or less. The shape of the substrate 11 can be, for example, a film or a plate, but is not particularly limited to these shapes. Note that the term "film" includes a sheet.

[0057] Examples of materials for the substrate 11 include, but are not limited to, methyl methacrylate (co)polymer, polycarbonate, styrene (co)polymer, methyl methacrylate-styrene copolymer, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, polyester, polyamide, polyimide, polyethersulfone, polysulfone, polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketone, polyurethane, and glass.

[0058] [Structure] Next, the structures 12 will be described. Generally, the wavelength band of visible light is 360 nm to 830 nm, but in this embodiment, the structures 12 are regularly arranged with a size equal to or smaller than the wavelength band of visible light. From this perspective, the arrangement pitch of the structures 12 does not exceed 350 nm. The structures 12 may have various shapes, such as a cone shape, a column shape, or a needle shape.

[0059] As will be described later, the structure 12 is formed by transferring a pattern corresponding to the moth-eye structure to a transfer material 36 such as an energy ray-curable resin composition applied to the substrate 11 using a roll master exposure device on which a pattern corresponding to the moth-eye structure is formed, and then curing the transfer material 36.

[0060] The cured product of the transfer material 36 may be hydrophilic. The transfer material 36 preferably contains one or more hydrophilic functional groups. Examples of such hydrophilic functional groups include a hydroxyl group, a carboxyl group, and a carbonyl group.

[0061] Furthermore, the energy ray-curable resin product forming the structures 12 may have different physical properties on both sides of the substrate 11. For example, by selectively using water repellency or hydrophilicity depending on the intended use, it is possible to impart a function such as anti-fogging to a specific surface.

[0062] As the energy ray-curable resin composition, an ultraviolet ray-curable resin composition is preferably used. The energy ray-curable resin composition may contain a filler, a functional additive, or the like, as needed.

[0063] The ultraviolet curable resin composition contains, for example, an acrylate and an initiator.

[0064] The ultraviolet curable resin composition contains, for example, a monofunctional monomer, a bifunctional monomer, a polyfunctional monomer, etc., and specifically, the following materials may be used alone or in combination.

[0065] That is, examples of "monofunctional monomers" include carboxylic acids (acrylic acid), hydroxyl groups (2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate), alkyl or alicyclic monomers (isobutyl acrylate, t-butyl acrylate, isooctyl acrylate, lauryl acrylate, stearyl acrylate, isobornyl acrylate, cyclohexyl acrylate), other functional monomers (2-methoxyethyl acrylate, methoxyethylene glycol acrylate, 2-ethoxyethyl acrylate, tetrahydrofurfuryl acrylate, benzyl acrylate, ethyl carbitol acrylate, phenoxyethyl acrylate, N,N-dimethylaminoethyl acrylate, Examples of the acrylate copolymer include N,N-dimethylaminopropyl acrylamide, N,N-dimethyl acrylamide, acryloylmorpholine, N-isopropyl acrylamide, N,N-diethyl acrylamide, N-vinylpyrrolidone, 2-(perfluorooctyl)ethyl acrylate, 3-perfluorohexyl-2-hydroxypropyl acrylate, 3-perfluorooctyl-2-hydroxypropyl acrylate, 2-(perfluorodecyl)ethyl acrylate, 2-(perfluoro-3-methylbutyl)ethyl acrylate, 2,4,6-tribromophenol acrylate, 2,4,6-tribromophenol methacrylate, 2-(2,4,6-tribromophenoxy)ethyl acrylate, and 2-ethylhexyl acrylate.

[0066] Examples of the "bifunctional monomer" include tri(propylene glycol) diacrylate, trimethylolpropane diallyl ether, and urethane acrylate.

[0067] Examples of the "polyfunctional monomer" include trimethylolpropane triacrylate, dipentaerythritol penta- and hexaacrylate, and ditrimethylolpropane tetraacrylate.

[0068] Among them, preferred resin compositions constituting the transfer material 36 include 2-hydroxyethyl acrylate, acrylic morpholine, glycerol acrylate, polyether acrylate, N-vinylformamide, N-vinylpyrrolidone, N-vinylcaprolactone, ethoxydiethylene glycol acrylate, methoxytriethylene glycol acrylate, polyethylene glycol acrylate, EO-modified trimethylolpropane triacrylate, EO-modified bisphenol A diacrylate, aliphatic urethane oligomer, polyester oligomer, etc.

[0069] Examples of the "initiator" include 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, and the like.

[0070] The filler may be, for example, either inorganic or organic fine particles. Examples of inorganic fine particles include fine particles of metal oxides such as SiO2, TiO2, ZrO2, SnO2, and Al2O3.

[0071] Examples of the "functional additives" include leveling agents, surface conditioners, and antifoaming agents.

[0072] By forming a moth-eye structure consisting of a fine concave-convex structure as the structure 12, the film laminate 1 has a high level of anti-reflection function. The anti-reflection performance of the film laminate 1 is 5% or less, preferably 1% or less, and more preferably 0.5% or less, combined on both the front and back surfaces. Shadowless lamps, which are used as light sources during surgery, have an illuminance of 100,000 lx or more, and even a few percent of their reflected light can be dazzling, so it is necessary to minimize reflection. Furthermore, the film laminate 1 includes an anti-reflection layer consisting of a moth-eye structure, in which a plurality of structures are arranged on a transparent substrate 11 at a pitch equal to or less than the wavelength of visible light, as the structure 12. This film laminate 1 has little wavelength or angle dependency and high anti-reflection performance, making it suitable for use as a medical face shield, eye shield, or protective clothing.

[0073] Furthermore, the film laminate 1 can be made anti-fogging by forming the multiple structures that make up the anti-reflective layer made of moth-eye structures with a pitch equal to or less than the wavelength of visible light from a hydrophilic resin.

[0074] Furthermore, by forming anti-reflection layers made of moth-eye structures on both sides of the transparent substrate 11, the film laminate 1 can be endowed with even more excellent anti-reflection performance.

[0075] [Manufacturing process for film-like materials] Next, a description will be given of a manufacturing process of the film-like member 2 on which the moth-eye structure is formed. The film-like member 2 has a pattern transferred thereon using a roll master exposure device on which a pattern corresponding to the moth-eye structure is formed, thereby forming the moth-eye structure.

[0076] [Roll master] As shown in Fig. 10, the roll master 41 has, for example, a columnar or cylindrical shape, and its columnar or cylindrical surface serves as a molding surface for molding a plurality of structures 12 on the surface of a substrate. On this molding surface, predetermined structures 42 are two-dimensionally arranged by, for example, dry etching, wet etching, or the like. The structures 42 have, for example, a concave or convex shape with respect to the molding surface. The material of the roll master 41 can be, for example, glass, but is not particularly limited to this material.

[0077] The plurality of structures 42 arranged on the molding surface of roll master 41 and the plurality of structures 12 arranged on the surface of base 11 described above have an inverted concave-convex relationship. That is, the shape, arrangement, arrangement pitch, etc. of structures 42 on roll master 41 are the same as those of structures 12 on base 11.

[0078] [Transfer process 1] As shown in FIG. 11(A), one surface of the substrate 11 is coated with a transfer material 36, and then the surface coated with the transfer material 36 is brought into close contact with a roll master 41 on which a pattern corresponding to the moth-eye structures is formed. Next, the transfer material 36 is irradiated with energy rays such as ultraviolet rays from an energy ray source 37 to harden the transfer material 36, and then the substrate 11 integrated with the hardened transfer material 36 is peeled off. This results in a film-like member 2 in which a plurality of structures 12 are formed on one surface of the substrate 11, as shown in FIG. 11(B). At this time, a base layer 13 may be further formed between the structures 12 and the substrate 11, if necessary.

[0079] The energy ray source 37 is not particularly limited as long as it can emit energy rays, such as electron beams, ultraviolet rays, infrared rays, laser beams, visible light, ionizing radiation (X-rays, alpha rays, beta rays, gamma rays, etc.), microwaves, or high frequency waves.

[0080] [Transfer process 2] When obtaining a film-like member 2 having a plurality of structures 12 formed on both sides of a substrate 11, as shown in FIG. 11(C), a roll master 41 for the moth-eye structures and a transfer material 36 applied to the surface opposite to the substrate 11 having the structures formed on one side are brought into close contact with each other, and then the transfer material 36 is irradiated with energy rays such as ultraviolet rays from an energy ray source 37 to harden the transfer material 36. Next, the substrate 11 integrated with the hardened transfer material 36 is peeled off. This results in a film-like member 2 having a plurality of structures 12 formed on both sides of the substrate 11, as shown in FIG. 11(D). At this time, a base layer 13 may be further formed between the structures 12 and the substrate 11, if necessary.

[0081] The resin composition used as the transfer material 36 in this transfer step 2 can be the same as that used in the transfer step 1 described above.

[0082] A protective film may be attached to the surface of the film-like member 2 obtained in transfer step 1 or up to transfer step 2. This makes it possible for the film-like member 2 to prevent the structure 12 from being damaged during subsequent steps or transportation.

[0083] [Shape forming process] The film-like member 2 obtained as described above is cut into a predetermined shape according to the protector 21 to be worn, and the above-mentioned insertion holes 4 are formed, and then the slits 10 are formed as appropriate, and processing into the tabs 20 is carried out. A numerically controlled cutting machine, a laser processing device, a punching press, or the like can be used to process the insertion holes 4 and the tabs 20. Using a punching press is preferable because the formation of the insertion holes 4 and cutting into the predetermined shape can be carried out in a single process.

[0084] [Lamination process] Next, the protruding members 5 are inserted into the insertion holes 4 of the film-like members 2 to laminate the film-like members 2. There is no particular limit to the number of layers of the film-like members 2 as long as there are multiple layers, and it can be set depending on the application of the protective equipment. However, the more layers there are, the greater the impact on optical properties, so the fewer layers there are, for applications requiring clear visibility. Also, in medical applications, hygiene is important and the entire film laminate 1 and protective equipment 21 may be disposable, so the number of laminated layers is preferably 2 to 3. As described above, the lamination method involves inserting the protruding members 5 into the insertion holes 4 of the film-like members 2 in order, starting from the bottom layer. Each film-like member 2 is laminated at a predetermined distance by the locking portions, and the entire front and back surfaces are exposed. In this way, the film laminate 1 is obtained.

[0085] [Sterilization process] Next, the film laminate 1 is sterilized. Sterilization can be performed by gas sterilization using ethylene oxide gas or the like, or by radiation sterilization using gamma rays or the like. The film laminate 1 has a predetermined gap between each film-like member 2, so that the entire front and back surfaces are exposed. This makes it possible to expose the entire surfaces of all film-like members 2 to the sterilization gas. Furthermore, the entire surface of the film laminate 1 can be sufficiently sterilized even when the film-like members 2 are formed using a material that is impermeable to sterilization gases such as ethylene oxide gas.

[0086] The sterilization treatment is carried out after the film laminate 1 is formed and before it is attached to the protective equipment 21 described below, but it may also be carried out after it is attached to the protective equipment 21 and at the same time as the protective equipment 21, or it may be carried out at both of these times.

[0087] When the film laminate 1 is in use, if the topmost film member 2 becomes soiled and peels off, the entire surface of the underlying film member 2 is exposed. Because the entire surface of the newly exposed film member 2 has been sterilized, the risk of infection to patients, examinees, other medical professionals, etc. can be reduced.

[0088] Furthermore, because the film-like member 2 can be peeled off simply by removing the insertion hole 4 from the protrusion member 5, there is no risk of damaging the moth-eye structure formed in the film-like member 2. In this regard, in a laminated structure in which the film-like members 2 are bonded together with an adhesive, peeling involves mechanical failure, such as interfacial failure between the adhesive layer and the film-like member 2 or cohesive failure between the adhesive layers, which can damage the moth-eye structure depending on the bonding strength, potentially adversely affecting visibility. Furthermore, scattering of adhesive layer residue and generation of outgassing from the adhesive layer are undesirable, particularly in medical settings.

[0089] Furthermore, even in a laminated structure in which film-like members 2 are joined by welding them together, physical destruction occurs between the film-like members 2 when they are peeled off, which carries the risk of damage to the moth-eye structure reaching the field of vision. Furthermore, scattering of residues due to destruction of the welded portions is undesirable, particularly in medical settings.

[0090] The film laminate 1 does not use any adhesive and the film-like member 2 is not welded, so there are no risks associated with these and it can be used safely.

[0091] [Protective equipment] The film laminate 1 is attached to a protective gear 21. The protective gear 21 is not particularly limited as long as it has a purpose of ensuring visibility by peeling off the film-like member 2, and examples thereof include medical protective clothing (coveralls), medical face shields, medical eye shields, medical displays, helmet visors, protective glasses for painting, and chemical protective clothing used in disasters and the like.

[0092] In the protective equipment 21 equipped with the film laminate 1, the film laminate 1 is placed on the area corresponding to the face or around the eyes of the user wearing the protective equipment 21. If the surface of the film laminate 1 becomes soiled during use of the protective equipment 21, the topmost film member 2 can be peeled off to quickly restore visibility while avoiding contact with contaminants. Because the entire front and back surfaces of each film member 2 in the film laminate 1 are sterilized, the sterilized surface is always visible not only during initial use but also after peeling. This reduces the risk of infection for patients, examinees, other medical professionals, etc. in medical applications. Furthermore, because the entire back surface of the peeled film member 2 is also sterilized, unsterilized areas are not exposed to patients, examinees, medical professionals, etc. during peeling or disposal.

[0093] The method of wearing the film laminate 1 is not particularly limited and may be determined appropriately depending on the specifications of the protective equipment 21 to be applied. FIG. 12 is an external perspective view showing a medical protective suit as an example of the protective equipment 21. For example, as shown in FIG. 12, the protective equipment 21 has an opening 22 provided at a position corresponding to the user's face, and the film laminate 1 is worn through this opening 22. In the film laminate 1 shown in FIG. 13, three film-like members 2 are stacked, and a base 7 is connected to the bottom film-like member 2a (i.e., the film-like member 2a positioned closest to the user's face) by adhesive or the like, and the middle film-like member 2b and the top film-like member 2c are inserted into two protrusion members 5 provided on the base 7. Note that the number of stacked film-like members 2 constituting the film laminate 1 according to the present technology is not limited to three. Furthermore, the number of protrusion members 5 is not limited to two.

[0094] The intermediate layer film-like member 2b is separated from the base 7 by the protrusions 9, exposing the entire front and back surfaces, as well as the entire surface of the base 7, allowing for sterilization treatment. As shown in Fig. 14, the intermediate layer film-like member 2b may be in contact with the base 7. Even in the configuration shown in Fig. 14, the film-like member 2b is only inserted into the protrusion members 5 and is not bonded to the base 7, and as long as the back surface of the film-like member 2b and the base 7 are in loose contact, it is possible to introduce sterilization gas.

[0095] 15, in the film laminate 1, the bottom film-like member 2a on which the base 7 is provided is formed to be larger than the opening 22. In addition, an adhesive layer 23 made of double-sided tape or the like is provided on the outer edge of the back surface side of the opening 22. Then, in the film laminate 1, the top film-like member 2a and the middle film-like member 2 are passed through the opening 22 from the back side of the protector 21, and the bottom film-like member 2a is adhered to the periphery of the opening 22 via the adhesive layer 23. In this way, the film laminate 1 can be attached to the protector 21.

[0096] 16, the bottom film-like member 2a may be attached to the front side of the protector 21. In this case, an adhesive layer 23 made of double-sided tape or the like is provided on the outer edge of the front side of the opening 22. The bottom film-like member 2a of the film laminate 1 is then adhered to the periphery of the opening 22 via the adhesive layer 23. In the configuration shown in FIG. 16, the middle film-like member 2b and the top film-like member 2c can have an area larger than the opening 22.

[0097] Furthermore, as shown in Figure 17, after connecting the film-like member 2a connected to the base 7 to the opening 22 of the protective equipment 21 (Figure 17(A)), the film-like member 2b as the middle layer is laminated (Figure 17(B)), and then the film-like member 2c as the top layer is laminated (Figure 17(C)), thereby forming the film laminate 1 and forming the protective equipment 21 equipped with the film laminate 1.

[0098] Furthermore, although not shown, the base 7 may be attached near the opening 22 of the protective equipment 21 by adhesive or the like, and multiple film-like members 2 may be sequentially laminated onto the protruding member 5 erected on the base 7, thereby forming a film laminate 1 and forming a protective equipment 21 equipped with the film laminate 1. [Example]

[0099] Next, examples of the present technology will be described. In the following examples, as an example sample, a film laminate sample was prepared in which a film-like member 2 was laminated using a protruding member 5 (hereinafter referred to as "hook member 34") having a locking portion formed thereon, as shown in Fig. 18, and as a comparative example sample, a film laminate sample was prepared in which a film-like member 2 was laminated by bonding with an adhesive 35, as shown in Fig. 19.

[0100] In this example, film laminate samples were prepared by varying the lamination means of the film-like member and the gap width, and gas sterilization evaluation, visibility assessment (transmittance %, haze %), peelability evaluation, and peeling risk of the moth-eye structure when peeling the film (hereinafter also referred to as "contamination evaluation") were performed.

[0101] The evaluation sample used for gas sterilization evaluation was a 100 x 100 mm film-like member, and a sticker (sterilization label EO-L manufactured by Nihon Yu Giken Kogyo Co., Ltd.) that displays the word "sterilized" when it reacts with EOG was attached to a total of five locations: the four corners and the center of the inner area of ​​the lamination means (hook member 34 or adhesive 35).

[0102] The sterilization conditions are as follows: Temperature: 50℃ Humidity: 50%RH Exposure time: 8 hours Chamber pressure: 100kPa, reduced pressure: -85kPa Flushing: 5 times

[0103] As a result, when the word "sterilized" appeared, it was evaluated as ○ (sterilization was effective), and when the word "sterilized" did not appear, it was evaluated as × (sterilization was not effective).

[0104] The transmittance [%] and haze [%] used in the visibility assessment (transmittance [%], haze [%]) were determined using a Murakami Color Research Laboratory haze meter (HM-150N) with a double beam method (JIS K 7361, JIS K 7136). An integrating sphere with a diameter of 150 mm was used. The visibility assessment criteria were as follows: a haze of less than 1.5% was rated as ○ (excellent), and a haze of 1.5% or more was rated × (poor).

[0105] The peelability was evaluated by sensory evaluation of the ease of peeling when peeled in the TD direction, and was rated as ◯ (excellent), △ (average), or × (poor) in order of ease of peeling.

[0106] The contamination assessment was an evaluation of the risk of peeling of the moth-eye structure when the film was peeled off, with ○ indicating no risk of peeling of the moth-eye structure, × indicating that peeling of the moth-eye structure was clearly foreseeable, and △ indicating that the risk of peeling of the moth-eye structure was not clear but was foreseeable to some extent.

[0107] Example 1 In Example 1, a film laminate sample was obtained by laminating a first film 31 having a moth-eye structure on a 188 μm-thick PET substrate, a second film 32 having a moth-eye structure on a 100 μm-thick PET substrate, and a third film 33 having a moth-eye structure on a 100 μm-thick PET substrate using a hook member 34. In Example 1, the films were laminated using the hook member 34 so that no gaps were generated between the first film 31 and the second film 32 and between the second film 32 and the third film 33 (gap width: approximately 0 mm).

[0108] Example 2 The film laminate sample of Example 2 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.038 mm.

[0109] Example 3 The film laminate sample of Example 3 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.050 mm.

[0110] Example 4 The film laminate sample of Example 4 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.075 mm.

[0111] Example 5 The film laminate sample of Example 16 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.100 mm.

[0112] Example 6 The film laminate sample of Example 6 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.150 mm.

[0113] Example 7 The film laminate sample of Example 7 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.300 mm.

[0114] Example 8 The film laminate sample of Example 8 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 0.500 mm.

[0115] Example 9 The film laminate sample of Example 9 is the same as Example 1, except that the film laminate sample was laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 was 1.0 mm.

[0116] Example 10 The film laminate sample of Example 10 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 2.0 mm.

[0117] Example 11 The film laminate sample of Example 11 is the same as Example 1, except that it is laminated so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 is 3.0 mm.

[0118] (Comparative Example 1) In Comparative Example 1, a film laminate sample was obtained by laminating a first film 31 made of a 188 μm thick PET substrate, a second film 32 made of a 50 μm thick PET substrate, and a third film 33 made of a 50 μm thick PET substrate, all over the surfaces of which were adhered with an acrylic adhesive 35. As shown in Fig. 19, in the film laminate sample of Comparative Example 1, the gap width was 0 mm due to the presence of an adhesive layer between the first film 31 and the second film 32 and between the second film 32 and the third film 33.

[0119] (Comparative Example 2) In Comparative Example 2, a film laminate sample was obtained by laminating a first film 31 having a moth-eye structure on a 188 μm-thick PET substrate, a second film 32 having a moth-eye structure on a 100 μm-thick PET substrate, and a third film 33 having a moth-eye structure on a 100 μm-thick PET substrate, all over the surfaces with an acrylic adhesive 35. In the film laminate sample of Comparative Example 2, the gap width was 0 mm because an adhesive layer was interposed between the first film 31 and the second film 32 and between the second film 32 and the third film 33.

[0120] (Comparative Example 3) In Comparative Example 3, a first film 31 having a moth-eye structure on a 188 μm-thick PET substrate, a second film 32 having a moth-eye structure on a 100 μm-thick PET substrate, and a third film 33 having a moth-eye structure on a 100 μm-thick PET substrate were used, and an acrylic adhesive 35 was applied to one side edge of each of the first film 31 to the third film 33 and laminated to obtain a film laminate sample. As shown in Fig. 20, the film laminate sample of Comparative Example 3 was laminated by bending one of the films, so that the gap width between the first film 31 and the second film 32 and between the second film 32 and the third film 33 was approximately 0 mm.

[0121] [Table 1]

[0122] As shown in Table 1, in the film laminate samples of Examples 1 to 11, the word "sterilized" appeared on the sticker, confirming the effectiveness of sterilization. In Example 1, even when no gaps are visible at first glance between the first film 31 and the second film 32 and between the second film 32 and the third film 33 in side view, these films are only lightly touching without being in close contact, and are laminated in a manner that allows sterilization gas to pass through. In other words, this example shows that the sterilization effect is achieved by laminating film-like members with a certain gap (approximately 0 to 3 mm) between them.

[0123] Furthermore, in the film laminate samples of Examples 1 to 11, the first film 31, the second film 32, and the third film 33 could be peeled off by disengaging the hook members 34, and the contamination evaluation was good, meaning that no force was applied in the direction of peeling off the moth-eye structures formed in the films, and there was no risk of peeling occurring.

[0124] In Comparative Example 3, in which adhesive 35 was provided on one edge of each of the first film 31 to the third film 33 and laminated, a sterilization effect similar to that of Examples 11 and 11 was confirmed. However, because the first film 31 to the third film 33 were laminated using an adhesive, the contamination evaluation was Fair. That is, when the first film 31, the second film 32, and the third film 33 were peeled, a force was applied in a direction that would cause the moth-eye structures formed on the films to peel off, creating a risk of peeling off of the moth-eye structures. In Comparative Example 2, because adhesive 35 was provided on the entire surfaces of the first film 31 to the third film 33 and laminated, the contamination evaluation was ×. That is, peeling off of the moth-eye structures was clearly predicted. In Comparative Example 1, no moth-eye structures were formed on the first film 31 to the third film 33, and therefore it was not included in the evaluation. [Explanation of symbols]

[0125] REFERENCE SIGNS LIST 1 film laminate, 2 film-like member, 3 protruding member, 4 insertion hole, 7 base, 9 convex portion, 10 slit, 11 substrate, 12 structure, 13 base layer, 20 tab, 21 protector, 22 opening, 23 adhesive layer, 36 transfer material, 37 energy ray source, 41 roll master, 42 structure

Claims

1. a plurality of film-like members that are stacked so as to be peelable; columnar protrusion members that protrude in the stacking direction of the film-like members and hold the film-like members at predetermined intervals; locking portions for locking the film-like member are provided on the outer peripheral surface of the protruding member at the predetermined intervals; the film-like member has an insertion hole through which the protruding member is removably inserted, The protruding members are inserted into the insertion holes, and the film-like members are engaged with the engaging portions, thereby holding the film-like members at predetermined intervals and stacking them.

2. 2. The film laminate according to claim 1, wherein the engagement portion is a convex portion that projects in a circumferential direction of the protruding member, and the film-like member is engaged between the convex portions.

3. The protrusion member has a plurality of the convex portions, and the diameter of the protrusion member increases gradually from the convex portion on the tip side to the convex portion on the base side, 3. The film laminate according to claim 2, wherein the insertion hole has an opening diameter corresponding to a diameter of the protrusion at the locking position of the film-like member.

4. 4. The film laminate according to claim 2, wherein the convex portions are cylindrical, ring-shaped, or spherical.

5. 2. The film laminate according to claim 1, wherein the locking portion is a groove formed in the circumferential direction of the protruding member, and the film-like member is locked in the groove.

6. 4. The film laminate according to claim 2, wherein the protruding member has a spherical convex portion formed at least at the tip thereof.

7. A film laminate as described in Claim 5, further comprising a spherical convex portion formed at the tip of the protrusion member.

8. 6. The film laminate according to claim 1, wherein the film member has one or more slits formed around the insertion hole.

9. The film laminate according to any one of claims 1 to 3 and 5, wherein the insertion hole is formed in the outer edge of the film-like member.

10. The film laminate according to any one of claims 1 to 3 and 5, wherein the film-like member is a flexible transparent substrate having a plurality of structures provided on at least one surface thereof at a pitch equal to or less than the wavelength of visible light.

11. forming a film-like member having an insertion hole; forming a protruding member provided with a locking portion to which the film-like member is locked; A method for manufacturing a film laminate, comprising the steps of inserting the protrusion member into the insertion hole of the film-shaped member, engaging the film-shaped member with the engaging portion, and stacking the multiple film-shaped members while holding them at a predetermined interval.

12. The method for producing a film laminate according to claim 11, further comprising a step of sterilizing a plurality of the film-like members in a stacked state while holding them at predetermined intervals.

13. In a protective device in which a film laminate is attached to the face or around the eyes of a user, The film laminate is a protective equipment according to any one of claims 1 to 3 and 5.

14. The protective equipment according to claim 13, wherein the protective equipment is any one of protective clothing, a face shield, an eye shield, and a helmet.

15. A method for manufacturing a protective device in which a film laminate is worn on the face or around the eyes of a user, comprising: forming a film laminate; and attaching the film laminate to a protective device, The method for manufacturing a protective equipment, wherein the film laminate is the one according to any one of claims 1 to 3 and 5.

Images