Film laminate, method for producing film laminate, protector, and method for producing protector

Abstract

Provided is a film laminate which is capable of obtaining a sufficient effect of sterilization treatment and which does not have the risk of damage to the film surface structure. A film laminate (1) is provided with: a plurality of film-like members (2) which are detachably laminated; and a columnar protruding member (5) that protrudes in the stacking direction of the film-like members (2) and holds the film-like members (2) at predetermined intervals, the outer peripheral surface of the protruding member (5) being provided with locking parts at predetermined intervals, the film-like members (2) having insertion through-holes (4) through which the protruding member (5) is inserted and removed freely. The protruding member 5 is inserted through the insertion through-hole 4, the film-like member 2 is locked to the locking portion, and the film-like member 2 is held at a predetermined interval and stacked.

Description

Technical Field

[0001] The present technology relates to a film laminate in which a plurality of film-like parts are stacked at predetermined intervals, a method for manufacturing the film laminate, a protective member using the film laminate, and a method for manufacturing the protective member. This application claims priority based on Japanese patent application No. 2022-082379 filed in Japan on May 19, 2022, and the application is cited in this application by reference to the application. Background Art

[0002] As a means of preventing occupational infection for medical practitioners, personal protective equipment is often used. In particular, protective equipment such as masks and protective clothing used to prevent exposure to blood or body fluids are used during examinations or operations, and are useful for preventing occupational infection caused by blood-borne pathogens (HIV, HBV, HCV) or coronaviruses (SARS-CoV-2, etc.).

[0003] However, the surface of such a protective member may be soiled by blood or body fluids scattered from a patient during an examination or operation. In an environment where such pollutants are flying around, it is required to avoid contact with the pollutants while quickly recovering the visual field.

[0004] In addition, helmet visors used in two-wheel or four-wheel car racing competitions, protective glasses for painting used during painting work, etc., often become dirty on the surface and obstruct vision.

[0005] In order to solve such a problem, in the past, a plurality of easily peelable protective films were stacked on the surface of the helmet mask or the surface of the protective glasses for coating, and when the field of vision was obstructed by dirt, the topmost protective film was peeled off together with the dirt to restore the field of vision. For this technology, for example, Patent Document 1 discloses a protective device for the mask portion of a helmet in which a plurality of sheet-like protective covers (i.e., disposable visors) are attached in a manner covering the mask portion of the helmet.

[0006] However, if the protective member is made into a laminated structure of only protective films as described above, reflection etc. will occur at the interface between the laminated layers. In addition, there is a problem that the transmittance decreases simply with the increase in the number of laminated sheets.

[0007] On the other hand, an optical element having a moth-eye structure with a pitch equal to or smaller than the wavelength of visible light and a protective member having excellent visibility by utilizing the low reflectivity characteristics of a film have been proposed (Patent Document 2).

[0008] The laminate described in Patent Document 2 is as follows Fig.21 , Fig. 22As shown, a plurality of film-like members having a moth-eye structure having projections and depressions with a pitch equal to or smaller than the wavelength of visible light on at least one surface of a base are fixed via an adhesive layer at least at the ends of the film-like members and are stacked in a releasable manner. Fig.21 The laminate shown is provided with an adhesive layer only at the end of the film-like member. Fig. 22 In the laminate shown, an adhesive layer is provided over the entire surface of the film-like member.

[0009] By stacking the film-like components with moth-eye structures, it is possible to prevent the increase of reflectivity and the decrease of transmittance, thereby ensuring visual recognition. In addition, when the surface of the stack is contaminated by blood or body fluids or the field of vision is obstructed by dirt, the top film-like component can be peeled off together with the dirt to restore the field of vision. Prior Art Literature Patent Literature

[0010] Patent Document 1: Japanese Patent Application Publication No. 2000-192322; Patent document 2: Japanese Patent Application Publication No. 2015-57317. Summary of the invention Problems to be solved by the invention

[0011] When such a protective member with laminated film members is used for medical purposes, the surface of each film member is sterilized by gas sterilization, etc. Then, if the contaminated uppermost film member is peeled off, a new sterile surface can be exposed on the outermost surface.

[0012] However, when a protective member of a stacked body in which film-like parts are stacked and fixed by an adhesive layer is used, when a sterilization treatment using gas or the like is performed, the surfaces of the film-like parts are not exposed in the portions joined by the adhesive layer, so the sterilization gas or the like cannot flow in, and the sterilization treatment is not performed.

[0013] exist Fig.21 In the structure shown, the sterilization effect can be effective in the central part of the film without the adhesive layer, but the outer edge of the film with the adhesive layer cannot be sterilized. Fig.21 In the structure shown, when the adhesive layer covers the entire periphery of the film, the film surface and the back surface of the film surrounded by the adhesive layer are not sterilized. Fig. 22 In the structure shown, only the outermost surface and the outermost surface of the laminated film are sterilized, and the film surface and the film back surface where the adhesive layer is interposed cannot be sterilized.

[0014] Therefore, if the contaminated uppermost film member is peeled off, a portion of the film member that has not been sterilized or a film member that has not been sterilized over its entire surface is exposed, and a sufficient sterilization effect cannot be obtained.

[0015] Furthermore, in the case of a transparent laminate having a moth-eye structure on the film surface, there is also a concern that the moth-eye structure may be destroyed due to the adhesive force when the film members are peeled off in a laminate design using an adhesive.

[0016] Therefore, an object of the present technology is to provide a film laminate, a method for producing the film laminate, a protector, and a method for producing the protector, which can achieve a sufficient sterilization effect and have no risk of damage to the film surface structure. Solutions to Solve Problems

[0017] In order to solve the above-mentioned problems, the film stack involved in the present technology comprises: a plurality of film-like parts, which are stacked in a peelable manner; and a columnar protrusion part, which protrudes along the stacking direction of the above-mentioned film-like parts and holds the above-mentioned film-like parts at a predetermined interval, and a locking part for locking the above-mentioned film-like parts is provided on the outer peripheral surface of the above-mentioned protrusion part at the above-mentioned predetermined interval, and the above-mentioned film-like part has an insertion through hole for the above-mentioned protrusion part to be inserted and removed freely, and the above-mentioned film-like parts are held and stacked at a predetermined interval by the above-mentioned protrusion part being inserted through the above-mentioned insertion through hole and the above-mentioned film-like parts being locked by the above-mentioned locking part.

[0018] In addition, the manufacturing method of the film stack involved in the present technology includes: a process of forming a film-like component having an insertion through hole; a process of forming a protruding component provided with a locking portion for locking the above-mentioned film-like component; and a process of inserting the above-mentioned protruding component into the above-mentioned insertion through hole penetrating the above-mentioned film-like component, locking the above-mentioned film-like component at the above-mentioned locking portion, and maintaining a plurality of the above-mentioned film-like components at a predetermined interval and stacking them.

[0019] In addition, the protective member according to the present technique is a protective member in which a film laminate is mounted around the face or eyes of a user, and the film laminate is the film laminate described above.

[0020] In addition, regarding the manufacturing method of the protective part involved in the present technology, the manufacturing method of the protective part having a film stack installed around the face or eyes of the user includes: a process of forming the film stack; and a process of installing the film stack on the protective part, and the above-mentioned film stack is the film stack described above. Effects of the Invention

[0021] According to the present technology, the film laminate can expose the entire front and back surfaces of each film member to the sterilization gas, and when the film member is peeled off, the film member whose entire front and back surfaces have been sterilized can always be exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded perspective view of a film stack to which the present technology is applied. Figure 2 is a side view showing a protruding member, Figure 2 (A) shows a protrusion component having a cylindrical protrusion, Figure 2 (B) shows a protruding part having an annular convex portion, Figure 2 (C) shows a protrusion component having a spherical protrusion, Figure 2 (D) shows a protrusion component in which the diameter of the convex portion is gradually increased from the tip side to the root side. Figure 2 (E) shows a protrusion member having a groove portion recessed throughout the circumferential direction. Figure 3 1 is a side view showing an example of the dimensions of a protrusion member having a cylindrical convex portion formed therein. Figure 4 This is a side view showing a state in which a film-like member is locked to a protrusion member provided with an annular convex portion. Figure 5 This is a diagram showing a configuration example in which four insertion through holes are arranged at equal intervals along the upper side of a substantially rectangular film-like member. Figure 6 It is a perspective view showing a slit formed around the insertion through hole. Figure 7 This is a cross-sectional view of a film-like member constituting a film laminate to which the present technique is applied. Figure 8 It is a cross-sectional view of another film-like member constituting the film laminate to which the present technology is applied. Fig. 9 It is a perspective view of another film-like member constituting the film laminate to which the present technology is applied. Fig.10 This is a perspective view of a transfer roller master on which a pattern of an antireflection layer composed of a moth-eye structure is formed. Fig.11 is a cross-sectional view showing a process of forming an antireflection layer composed of a moth-eye structure, Fig.11 (A) shows a state in which the surface of the transfer material coated with the substrate is brought into close contact with the roller master. Fig.11 (B) shows a film-like member on which a moth-eye structure is transferred on one side. Fig.11 (C) shows a state where a transfer material is applied to the other side of a film-like member on one side of which a moth-eye structure is transferred, and the film-like member is brought into close contact with a roll master. Fig.11 (D) shows a film-like member on both sides of which the moth-eye structure is transferred. Fig.12 This is a perspective view showing the appearance of a medical protective suit shown as an example of a protective member. Fig.13 It is a cross-sectional view showing one configuration example of a film stack. Fig.14 It is a cross-sectional view showing another configuration example of the film laminate. Fig.15 This is a cross-sectional view showing an example of a process of attaching the film stack to the protective member. Fig.16 It is a cross-sectional view showing another example of the process of attaching the film laminate to the protective member. Fig.17 It is a cross-sectional view showing another example of the process of attaching the film laminate to the protective member. Fig.18 This is a diagram for explaining the configuration of a film laminate sample in which a film-like member is laminated via a hook member. Fig.19 1 is a diagram for explaining the structure of a film laminate sample in which a film-like member is laminated by full-surface bonding with an adhesive. Fig.19 (A) is a top view. Fig.19 (B) is a cross-sectional view. Fig. 20 This is a diagram showing a film laminate sample in which an adhesive is provided on one side edge of a film-like member and the film-like member is laminated. Fig. 20 (A) is a top view. Fig. 20 (B) is a cross-sectional view. Fig.21 It is a cross-sectional view showing a laminated body in which a plurality of film-like members are laminated via an adhesive layer provided at the end of the film-like members. Fig. 22 It is a cross-sectional view showing a laminated body in which a plurality of film-like members are laminated via an adhesive layer provided on the entire surface of the film-like member. DETAILED DESCRIPTION

[0023] Hereinafter, with reference to the accompanying drawings, the film laminate, the method for manufacturing the film laminate, the protective member, and the method for manufacturing the protective member to which the present technology is applicable are described in detail. In addition, the present technology is not limited to the following embodiments, and various changes can be made without departing from the main purpose of the present technology. In addition, the accompanying drawings are schematic, and the ratios of the various dimensions are sometimes different from the actual ones. The specific dimensions should be determined with reference to the following description. In addition, of course, the drawings also include parts with different dimensional relationships or ratios.

[0024] [Film laminate] like Figure 1 As shown, the film stack 1 to which the present technology is applied comprises: a plurality of film members 2 which are stacked so as to be peelable; and a columnar protrusion member 5 which protrudes in the stacking direction of the film members 2 and holds the film members 2 at a predetermined interval. Figure 2As shown in the figure, a locking portion for locking the film-like member 2 is provided at the predetermined interval on the outer peripheral surface of the protruding member 5. The film-like member 2 has an insertion through hole 4 through which the protruding member 5 can be inserted and removed freely. And, when the protruding member 5 is inserted through the insertion through hole 4, the film-like member 2 is locked at the locking portion. Thus, the film-like member 2 is held and stacked at a predetermined interval.

[0025] The film-like member 2 is a transparent sheet having flexibility. The plurality of film-like members 2 are respectively formed with insertion through holes 4, and the protrusion member 5 is inserted through the insertion through holes 4, so that the plurality of film-like members 2 are stacked. Each film-like member 2 is stopped by a stopper provided on the outer peripheral surface of the protrusion member 5, and is held at a predetermined interval. Thus, the plurality of film-like members 2 are stacked at a predetermined distance, and the front and back surfaces of each film-like member 2 are fully exposed.

[0026] Therefore, in the film laminate 1, the entire front and back surfaces of each film member 2 can be exposed to the sterilization gas, and when the film member 2 is peeled off, the film member 2 whose entire front and back surfaces have been sterilized can always be exposed.

[0027] Moreover, in medical applications, when the surface is soiled due to blood or body fluids scattered from the patient during examination or surgery, by peeling off the topmost film-like member 2, it is possible to avoid contact with pollutants and quickly restore the visual field. At this time, the entire surface of the film-like member 2 that appears after the film laminate 1 is peeled off has been sterilized, thereby reducing the risk of infection to the patient, the examinee, other medical personnel, etc. In addition, the entire back surface of the peeled film-like member 2 has also been sterilized, so that when peeling off or discarding, the unsterilized part will not be exposed to the patient, the examinee, the medical personnel, etc.

[0028] [Protruding parts] The protrusion member 5 supporting the membrane member 2 is columnar, for example, Figure 1 As shown, the protruding member 5 is provided near both ends of the rectangular plate-shaped base 7 and is provided protrudingly along the stacking direction of the film-shaped member 2. The protruding member 5 can be formed by well-known engineering plastics or the like. The forming method can adopt well-known forming methods such as metal mold forming and cutting. In addition, the protruding member 5 can be formed integrally with the base 7, or after being formed as a separate part, it can be connected by bonding or the like.

[0029] [Locking part] In addition, the protruding member 5 has locking portions formed at predetermined intervals on the outer peripheral surface for locking the film-like member 2. The locking portions are formed as a plurality of convex portions 9 protruding in the circumferential direction of the protruding member 5, and the insertion through hole 4 of the film-like member 2 inserted through the protruding member 5 is locked between the convex portions 9. Thus, the movement of the film-like member 2 in the erection direction of the protruding member 5 is restricted, and the film-like member 2 is held at predetermined intervals.

[0030] The shape of the protrusion 9 is not particularly limited as long as it can lock the film-like member 2. For example, Figure 2 As shown in (A), it may also be cylindrical. The locking portion is provided with a plurality of cylindrical protrusions 9a at predetermined intervals, so that the film-like member 2 is locked between the protrusions 9a, thereby being able to hold the film-like member 2. The intervals between the film-like members 2 are determined by the width of the protrusions 9a in the vertical arrangement direction of the protrusion member 5.

[0031] Figure 3 1 is a side view showing an example of the dimensions of the protruding member 5 formed with the convex portion 9a. Figure 3 The protruding member 5 shown in the figure is a film-like member 2 with a thickness of 0.5 mm and a spacing of 1.5 mm. Figure 3 As shown, the convex portion 9a may also be in the shape of a ring with the side surface being in the shape of an arc. Thus, the insertion and removal of the membrane component 2 can be smoothly performed, and damage during insertion can be prevented. In addition, the side surface of the stopper portion is rounded, thereby improving the safety of the user or other components and creating a sense of security.

[0032] In addition, if Figure 2 As shown in (B), the shape of the protrusion 9 may also be annular. The locking portion can limit the movement to the root side or the end side of the protrusion member 5 closer to the protrusion 9b, or can be locked between two protrusions 9b to limit the movement. Figure 2 In the example shown in (B), when three film-like members 2 are held, the movement of the film-like member 2 of the lowest layer toward the tip side of the protrusion member 5 is restricted by the convex portion 9b formed on the most root side of the protrusion member 5, the movement of the film-like member 2 of the highest layer toward the root side of the protrusion member 5 is restricted by the convex portion 9b formed on the most tip side of the protrusion member 5, and the movement of the film-like member 2 of the middle layer toward the root side and the tip side of the protrusion member 5 is restricted by a pair of convex portions 9b provided in the middle. The intervals between the film-like members 2 are determined by the intervals between the convex portions 9b extending over the vertical arrangement direction of the protrusion member 5 (see FIG. 1 ). Figure 4 ).

[0033] Or, if Figure 2As shown in (C), the shape of the protrusion 9 may also be spherical. The locking portion is provided with a plurality of spherical protrusions 9c, so that the film-like member 2 is locked between the protrusions 9c, thereby being able to hold the film-like member 2. The interval between the film-like members 2 is determined by the diameter of the protrusions 9c and the interval between the protrusions 9c in the vertical setting direction of the protrusion member 5. By providing the spherical protrusions 9c, the film-like member 2 can be smoothly inserted and removed.

[0034] As long as it is possible to prevent the close contact of the film-like parts 2 and expose the entire surface and back surface to the sterilizing gas, the interval between the film-like parts 2 is not particularly limited, and is preferably 0.1 mm or more, for example. In addition, if the interval is too wide, the risk of foreign matter mixing in when the protective member 21 is used increases, so it is preferably 5 mm or less, and more preferably as narrow as possible. In addition, the interval between the film-like parts 2 can also be constant or different. For example, the interval between the top film-like part 2 and the second film-like part 2 and the interval between the second film-like part 2 and the bottom film-like part 2 can also be different.

[0035] In addition, the protrusion member 5 may also be provided with a spherical convex portion 9c at the distal end. By providing the spherical convex portion 9c at the distal end, the membrane member 2 can be smoothly inserted and removed, and damage during insertion can be prevented. In addition, the distal end of the protrusion member 5 is rounded, thereby improving the safety of the user or other members and creating a sense of security.

[0036] In addition, if Figure 2 As shown in (D), the protruding member 5 may be provided with a plurality of convex portions 9, and the diameters may be expanded in sequence from the convex portions 9 on the end side to the convex portions 9 on the root side, and the insertion through hole 4 provided in the film-like member 2 may have an opening diameter corresponding to the diameter of the convex portions 9 at the locking position of the film-like member 2. Thus, the film-like member 2 of the uppermost layer or the film-like member 2 of the middle layer may be prevented from moving from the predetermined locking position to the root side. In addition, when determining the stacking order of the film-like members 2, it may be prevented that at least the film-like member 2 of the uppermost layer or the film-like member 2 of the middle layer is locked at a position closer to the root side than the predetermined locking position.

[0037] In addition, in addition to the convex portion 9, the locking portion may also include Figure 2 As shown in (E), a plurality of grooves 9d may be formed to be recessed in the circumferential direction of the protruding member 5, and the protruding member 5 may be locked in the grooves 9d around the insertion through hole 4 of the film-like member 2 that has been inserted through. In addition, the locking portion may be formed by appropriately combining the above-mentioned convex portions 9a to 9c or the grooves 9d.

[0038] [Membrane parts] The film member 2 is a flexible transparent sheet. The shape of the film member 2 is not particularly limited, and may be, for example, Figure 1The substantially rectangular shape shown can be appropriately selected according to the applied protector 21, etc. The plurality of film-like members 2 are respectively formed with insertion through holes 4, and the protrusion members 5 are inserted through the insertion through holes 4 and locked in the locking portions.

[0039] The protrusions 5 and the insertion through holes 4 can stably hold the film-like member 2 at a predetermined distance, and do not interfere with the user's field of vision in the film-like member 2 during use. In addition, the protrusions 5 and the insertion through holes 4 are arranged in such a position and in such a number that the peeling operation can be easily performed. From such a viewpoint, the insertion through holes 4 are preferably arranged at the outer edge of the film-like member 2, preferably, as Figure 1 As shown, the film-like member 2 is formed on both ends of the upper side thereof, for example, in a substantially rectangular shape, or as shown in FIG. Figure 5 As shown, a plurality of (e.g., 4) are arranged at equal intervals along the upper side of the roughly rectangular film-like member 2. In addition, the insertion through hole 4 may be formed on the lower side or the side edge in addition to the upper side of the roughly rectangular film-like member 2, or may be formed at one or more locations thereof or arranged in plurality. The protrusion member 5 is also formed and arranged in accordance with the formation position of the insertion through hole 4. The formation position or number of the protrusion member 5 and the insertion through hole 4 is not limited to the above-mentioned position or number, and is appropriately set in accordance with the assembly structure, use, etc. of the protective member 21 or the film laminate 1.

[0040] In addition, if Figure 6 As shown, the film member 2 may have one or more slits 10 formed around the insertion through hole 4. The locking portion of the protrusion member 5 is pressed into the insertion through hole 4, so the film member 2 can be inserted and removed more smoothly by forming the slits 10.

[0041] The film-like member 2 may also be provided with a convex piece 20 for peeling at the outer edge. The convex piece 20 is a portion to be gripped when peeling the film-like member 2. The film-like member 2 preferably has a function of identifying the film-like member 2 to be peeled off on the convex piece 20. This can promote the peeling of the film-like member 2 from the top layer, and can prevent the film-like member 2 of the middle layer from being peeled off together with the film-like member 2 of the upper layer by mistake.

[0042] As a means for identifying the film-like member 2 of the uppermost layer, the size of the convex piece 20 can be reduced in order from the uppermost layer. Figure 1 As shown, the protrusion 20 formed on the topmost membrane part 2 is formed larger than the protrusion 20 of the membrane part 2 on the lower layer, and the protrusions of the membrane part 2 on the lower layer are hidden, so that it is always easy to grasp only the protrusion 20 of the membrane part 2 on the topmost layer, and it can prevent the protrusion 20 of the membrane part 2 on the lower layer from being accidentally grasped.

[0043] In addition, for example, the position of the projection 20 may be changed for each film-like member 2. For example, the projection 20 is formed on the right edge of the film-like member 2 in the uppermost layer in front view, and the projection 20 is formed on the left edge of the film-like member 2 in the middle layer in front view. Thus, by first grasping the projection 20 at the right edge and peeling off the film-like member 2 in the uppermost layer, it is possible to prevent the film-like member 2 in the middle layer from being peeled off by mistake.

[0044] Alternatively, identification may be performed by changing the color of the convex piece 20 or processing physical features such as concave and convex marks or openings or cutouts for each film-like member 2. Furthermore, the above-mentioned identification means may be combined.

[0045] In addition, regarding the film laminate 1, the film-like members 2 constituting each layer may be all the same, and the functions or optical characteristics may be different. This is appropriately selected according to the purpose of the protective member 21 to which the film laminate 1 is applied. In addition, the stacking order when stacking film-like members 2 with different functions or characteristics is also appropriately set according to the purpose of the protective member 21.

[0046] [Moth Eye Structure] Here, the film-like member 2 is preferably provided with a plurality of structures at a pitch below the wavelength of visible light on at least one surface of a flexible transparent substrate, thereby serving as an optical element having an anti-reflection function. Hereinafter, the fine concave-convex structure having the anti-reflection function is referred to as a "moth-eye structure". In addition, the film laminate 1 does not impair visual recognition by using the film-like member 2 having the moth-eye structure and laminating the film-like member 2.

[0047] like Figure 7 As shown, the film-like member 2 is provided with structures 12 on both sides of the substrate 11 via the base layer 13 at a pitch less than the wavelength of visible light, thereby having an anti-reflection function on both the opposite surfaces of the front and back. A plurality of structures 12 are regularly arranged on the surface and back of the substrate 11 in a manner of forming a plurality of rows on the base layer 13. That is, the surface and back of the film-like member 2 have a concave-convex shape based on a moth-eye structure composed of a plurality of structures 12. In addition, the film-like member 2 may also be provided with structures 12 only on the surface of the substrate 11.

[0048] The film member 2 can provide the protective member 21 with the film laminate 1 with an optical adjustment function that has little wavelength dependence and excellent visibility by providing such uneven shapes on the front and back surfaces of the film member 2. That is, it can contribute to the realization of the protective member 21 with excellent visibility.

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

[0050] Furthermore, the refractive index of the structure 12 is preferably the same as or substantially the same as the refractive index of the base 11. This is because internal reflection can be suppressed and contrast can be improved.

[0051] exist Figure 7 In the example in which the structure 12 is formed on the front and back surfaces of the substrate 11 via the base layer 13, the base layer 13 plays the role of improving the adhesion of the structure 12 to the substrate 11. In this case, the base layer 13 is an optical layer formed integrally with the structure 12 on the bottom surface side of the structure 12, has transparency, and can be formed by curing the same energy ray curable resin composition as the structure 12.

[0052] In addition, if Figure 8 As shown, the film laminate 1 may use a film-like member 2 in which a moth-eye structure based on a plurality of structures 12 is directly formed on a base 11 without having the base layer 13 .

[0053] Furthermore, if Fig. 9 As shown, the film laminate 1 may use a film-like member 2 in which a base body and a structure body are integrally molded. Fig. 9 The film-like member 2 shown has structures 12 integrally formed on both surfaces of a base 11 .

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

[0055] When a plastic material is used as the substrate 11, in order to further improve the surface energy, coating properties, sliding properties, planarity, etc. of the surface of the plastic material, a primer layer (not shown) may be further provided by surface treatment. Examples of the primer layer include organic alkoxy metal compounds, polyesters, acrylic modified polyesters, polyurethanes, etc. In addition, in order to obtain the same effect as providing a primer layer, the surface of the substrate 11 may be subjected to 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 forming a film in a film shape after diluting it in a solvent and drying it. The thickness of the substrate 11 is preferably appropriately selected according to the purpose of the film-like component 2, and can be, for example, about 10 μm or more and 500 μm or less. As the shape of the substrate 11, for example, a film shape, a plate shape, etc. can be listed, but it is not particularly limited to these shapes. In addition, the film includes a sheet.

[0057] Examples of materials for the substrate 11 include, but are not limited to, methyl methacrylate (co)polymers, polycarbonates, styrene (co)polymers, methyl methacrylate-styrene copolymers, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, polyesters, polyamides, polyimides, polyether sulfones, polysulfones, polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketones, polyurethanes, and glass.

[0058] [Construct] Next, the structure 12 is described. Generally speaking, the wavelength band of visible light is 360nm to 830nm, but in this embodiment, the structure 12 is regularly arranged with a size below the wavelength band of visible light. From the perspective involved, the arrangement pitch of the structure 12 does not exceed 350nm. The structure 12 can be various shapes such as cone, column, needle, etc.

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

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

[0061] The energy-beam-curable resin product forming the structure 12 may have different physical properties on both sides of the base 11. For example, by using water-repellent properties and hydrophilic properties separately according to the application, a specific side can have an anti-fogging function.

[0062] As the energy-ray curing resin composition, an ultraviolet curing resin composition is preferably used. In addition, the energy-ray curing resin composition may contain a filler or a functional additive as required.

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

[0064] The ultraviolet curable resin composition contains, for example, a monofunctional monomer, a difunctional monomer, a polyfunctional monomer, and the like. Specifically, the following materials are used alone or in combination of two or more.

[0065] That is, as the "monofunctional monomer", for example, carboxylic acid monomers (acrylic acid), hydroxy monomers (2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate), alkyl or alicyclic monomers (isobutyl acrylate, tert-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), Ester, N,N-dimethylaminopropyl acrylamide, N,N-dimethyl acrylamide, acryloyl morpholine, N-isopropyl acrylamide, N,N-diethyl acrylamide, N-vinyl pyrrolidone, 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), 2-octyl acrylate, etc.

[0066] Examples of the "difunctional monomer" include tripropylene glycol diacrylate, trimethylolpropane diallyl ether, and urethane acrylate.

[0067] Examples of the “polyfunctional monomer” include trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and ditrimethylolpropane tetraacrylate.

[0068] Among them, in particular, the preferred resin composition for constituting the transfer material 36 includes 2-hydroxyethyl acrylate, morpholine acrylate, glycerol acrylate, polyether acrylate, N-vinyl formamide, N-vinyl pyrrolidone, N-vinyl caprolactone, ethoxydiethylene glycol acrylate, methoxytriethylene glycol acrylate, polyethylene glycol acrylate, EO-modified trimethylolpropane triacrylate, EO-modified bisphenol A diacrylate, aliphatic urethane oligomers, polyester oligomers, etc.

[0069] Examples of the “initiator” include 2,2-dimethoxy-1,2-diphenylethane-1-one, 1-hydroxy-cyclohexyl phenyl ketone, and 2-hydroxy-2-methyl-1-phenylpropane-1-one.

[0070] As the “filler”, for example, any of inorganic fine particles and organic fine particles can be used. Examples of the inorganic fine particles include fine particles of metal oxides such as SiO 2 , TiO 2 , ZrO 2 , SnO 2 , and Al 2 O 3 .

[0071] Examples of the “functional additive” include a leveling agent, a surface conditioner, and a defoaming agent.

[0072] As the structure 12, the film laminate 1 has a high anti-reflection function by forming a moth-eye structure composed of fine concave-convex structures. Here, regarding the anti-reflection performance of the film laminate 1, the total of the surface and the back is less than 5%, preferably less than 1%, and more preferably less than 0.5%. The shadowless lamp used as the light source during surgery has an illumination of more than 100,000 lx, and these reflected lights will feel dazzling even if they are a few percent, so it is required to suppress reflection as much as possible. Moreover, as the structure 12, the film laminate 1 having an anti-reflection layer composed of a moth-eye structure that constitutes a plurality of structures on a transparent substrate 11 with a spacing less than the wavelength of visible light has less wavelength dependence or angle dependence and high anti-reflection performance, so it can be suitably used as a medical mask, eye mask, and protective clothing.

[0073] In addition, the film laminate 1 can provide anti-fogging properties by forming the plurality of structures having a pitch equal to or smaller than the wavelength of visible light constituting the anti-reflection layer composed of the moth-eye structure from a hydrophilic resin.

[0074] Furthermore, the film laminate 1 can be provided with more excellent antireflection performance by forming an antireflection layer composed of a moth-eye structure on both surfaces of the transparent substrate 11 .

[0075] [Manufacturing process of film-like member] Next, a process for manufacturing the film-like member 2 on which the moth-eye structure is formed will be described. The film-like member 2 is formed into the moth-eye structure by transferring a pattern using a roll master exposure device on which a pattern corresponding to the moth-eye structure is formed.

[0076] [Roller Master] like Fig.10 As shown, the roller master 41 has, for example, a cylindrical or cylindrical shape, and its cylindrical surface or cylindrical surface is a molding surface for molding a plurality of structures 12 on the substrate surface. On this molding surface, for example, predetermined structures 42 are arranged two-dimensionally by dry etching, wet etching, etc. The structures 42 have, for example, a concave or convex shape relative to the molding surface. As a material of the roller master 41, for example, glass can be used, but it is not particularly limited to this material.

[0077] The structures 42 disposed on the molding surface of the roller master 41 are in an inverse concave-convex relationship with the structures 12 disposed on the surface of the substrate 11. That is, the shapes, arrangement, and arrangement pitch of the structures 42 of the roller master 41 are the same as those of the structures 12 of the substrate 11.

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

[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 rays, ionizing radiation (X-rays, α-rays, β-rays, γ-rays, etc.), microwaves or high-frequency energy rays.

[0080] [Transfer process 2] In the case where a film-like member 2 having a plurality of structures 12 formed on both surfaces of a base 11 is obtained, further, as Fig.11 As shown in (C), after the roller master 41 for the moth-eye structure is brought into close contact with the transfer material 36 coated on the surface of the substrate 11 on the opposite side of the substrate 11 on which the structure is formed on one side, energy rays such as ultraviolet rays are irradiated from the energy ray source 37 to the transfer material 36 to cure the transfer material 36. Next, the substrate 11 integrated with the cured transfer material 36 is peeled off. Fig.11 As shown in (D), a film-like member 2 is obtained in which a plurality of structures 12 are formed on both surfaces of the base 11. At this time, a base layer 13 may be further formed between the structures 12 and the base 11 as needed.

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

[0082] Alternatively, a protective film may be attached to the surface of the film member 2 obtained before the transfer step 1 or the transfer step 2. Thus, the film member 2 can prevent the structure 12 from being damaged in subsequent steps or transportation.

[0083] [Shape forming process] The film-like member 2 obtained in the above is cut into a predetermined shape according to the attached protection member 21, and the above-mentioned insertion through hole 4 is formed, and the formation of the slit 10 or the processing of the convex piece 20 is appropriately performed. The processing of the insertion through hole 4 or the convex piece 20 can be performed using a numerically controlled cutting machine or laser processing device, a punching and stamping device, etc. If punching and stamping are used, the formation of the insertion through hole 4 and the cutting into a predetermined shape can be performed in one process, which is suitable.

[0084] [Lamination process] Next, the film-like member 2 is stacked by inserting the protruding member 5 into the insertion through hole 4 that passes through the film-like member 2. The number of layers of the film-like member 2 is not particularly limited as long as it is multi-layered, and can be set accordingly to the purpose of the protective member. However, the more layers are overlapped, the greater the impact on the optical properties, so in applications that require a clear field of view, the fewer the number of layers, the better. In addition, in medical applications, there are also cases where hygiene is emphasized and the film stack 1 or the protective member 21 becomes a disposable item as a whole, so the number of stacked sheets is preferably 2 to 3 layers. As described above, the stacking method inserts the insertion through hole 4 into the protruding member 5 in sequence from the film-like member 2 of the bottom layer. Each film-like member 2 is stacked at a predetermined distance by a stopper, and the entire surface and back are exposed. Thus, a film stack 1 is obtained.

[0085] [Sterilization process] Next, the film stack 1 is sterilized. In the sterilization process, gas sterilization using ethylene oxide gas or radiation sterilization using gamma rays or the like can be used. The film stack 1 exposes the entire front and back surfaces by providing a predetermined gap between each film-like member 2. Therefore, the entire surfaces of all the film-like members 2 can be exposed to the sterilizing gas. Furthermore, even when the film-like member 2 is formed of a material that is impermeable to sterilizing gas such as ethylene oxide gas, the entire surface of the film stack 1 can be fully sterilized.

[0086] The sterilization treatment is performed after the film laminate 1 is formed and before it is attached to the protective member 21 described later, but may be performed after it is attached to the protective member 21 and together with the protective member 21, or may be performed at both timings.

[0087] When the film laminate 1 is used, if the uppermost film member 2 is peeled off due to contamination, the entire surface of the lower film member 2 is exposed. The entire surface of the newly exposed film member 2 is sterilized, thereby reducing the risk of infection to patients, examinees, other medical personnel, etc.

[0088] In addition, the film-like member 2 can be peeled off simply by untying the insertion through hole 4 from the protrusion member 5, so there is no risk of damaging the moth-eye structure formed on the film-like member 2. In this regard, in a laminated structure in which the film-like members 2 are bonded together by an adhesive material, mechanical damage such as interface damage between the adhesive layer and the film-like member 2 or cohesion damage between the adhesive layers occurs during peeling, so there is a risk that the moth-eye structure is damaged by the bonding force and the visual field is adversely affected. In addition, the scattering of adhesive layer residues or the generation of gas from the adhesive layer are not preferred in medical fields.

[0089] In addition, in a laminated structure in which the film-like members 2 are joined by welding the film-like members 2 to each other, the film-like members 2 are physically destroyed when peeling, and there is a risk that the damage of the moth-eye structure will affect the field of vision. In addition, the scattering of residues accompanying the destruction of the welded parts is particularly undesirable in medical fields.

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

[0091] [Protective parts] The film laminate 1 is assembled on the protective member 21. The protective member 21 is not particularly limited as long as it has the purpose of ensuring the field of vision by peeling off the film-like member 2, and examples thereof include medical protective clothing (overalls), medical masks, medical eye masks, medical displays, helmet visors, protective glasses for painting, chemical protective clothing used in disasters, etc.

[0092] The protective member 21 equipped with the film laminate 1 is provided with the film laminate 1 at a position corresponding to the face or the surrounding area of ​​the eyes of the user wearing the protective member 21. Moreover, when the surface of the film laminate 1 is contaminated during the use of the protective member 21, by peeling off the film-like member 2 of the top layer, it is possible to avoid contact with pollutants and quickly seek to restore the field of vision. Since the entire surface and back surface of the film-like member 2 of each layer of the film laminate 1 have been sterilized, the sterilized surface always appears on the surface not only in the initial use, but also after peeling. Thus, in medical use, the risk of infection to patients, examinees, other medical personnel, etc. can be reduced. In addition, the entire back surface of the peeled film-like member 2 is also sterilized, so when peeling or discarding, the unsterilized part will not be exposed to the patient, the examinee, the medical personnel, etc.

[0093] The method of assembling the film laminate 1 is not particularly limited, and may be appropriately determined according to the specification of the protective member 21 to be applied. Fig.12 2 is a perspective view showing the appearance of a medical protective suit as an example of the protective member 21. Fig.12As shown, the protective member 21 has an opening 22 at a position corresponding to the user's face, and the film laminate 1 is mounted in the opening 22. Fig.13 The film stack 1 shown is composed of three film members 2, a base 7 is connected to the bottom film member 2a (i.e., the film member 2a disposed closest to the user's face) by bonding or the like, and the middle film member 2b and the top film member 2c are inserted through two protrusion members 5 provided on the base 7. In addition, the number of layers of the film members 2 constituting the film stack 1 involved in the present technology is not limited to three. In addition, the number of protrusion members 5 is not limited to two.

[0094] The film-like member 2b of the intermediate layer is separated from the base 7 by the convex portion 9, and the front and back surfaces are fully exposed, and the surface of the base 7 can be fully exposed for sterilization. Fig.14 As shown, the membrane component 2b of the intermediate layer may also be connected to the base 7. Fig.14 In the illustrated configuration, the film member 2 b is only inserted through the protrusion member 5 without being bonded to the base 7 , and as long as the back surface of the film member 2 b is in gentle contact with the base 7 , the sterilizing gas can be introduced.

[0095] like Fig.15 As shown in the figure, the bottom film-like member 2a of the film laminate 1 provided with the base 7 is formed larger than the opening 22. In addition, an adhesive layer 23 based on a double-sided tape or the like is provided on the outer edge of the back side of the opening 22. In addition, the film laminate 1 allows the top film-like member 2a and the middle film-like member 2 to pass through the opening 22 from the back side of the protective member 21, and the bottom film-like member 2a is bonded to the periphery of the opening 22 via the adhesive layer 23. Thus, the film laminate 1 can be assembled to the protective member 21.

[0096] In addition, if Fig.16 As shown, the bottom film-like member 2a may be mounted on the surface side of the protective member 21. In this case, an adhesive layer 23 made of double-sided tape or the like is provided on the outer edge of the surface side of the opening 22. The film laminate 1 is bonded to the bottom film-like member 2a around the opening 22 via the adhesive layer 23. Fig.16 In the illustrated configuration, film members having a larger area than the opening 22 can be used as the intermediate film member 2 b and the uppermost film member 2 c .

[0097] In addition, if Fig.17 As shown, it is also possible to connect the membrane member 2a connected to the base 7 to the opening 22 of the protective member 21 ( Fig.17 (A)), the film-like member 2b of the intermediate layer is laminated ( Fig.17 (B)), Next, the uppermost film member 2c is laminated ( Fig.17(C)), the film stack 1 is formed and the protective member 21 including the film stack 1 is formed.

[0098] In addition, although not shown in the figure, the base 7 can be assembled near the opening portion 22 of the protective member 21 by bonding, etc., and a plurality of film-like parts 2 can be stacked in sequence on the protruding parts 5 upright on the base 7 to form a film stack 1 and a protective member 21 having the film stack 1. Example

[0099] Next, the embodiments of the present technology are described. In the following embodiments, as the embodiment samples, Fig.18 As shown in FIG. 1 , a film laminate sample in which a film-like member 2 is laminated using a protruding member 5 (hereinafter referred to as a "hook member 34") having a locking portion is prepared as a comparative example sample. Fig.19 As shown in FIG. 1 , a film laminate sample in which film-like members 2 are bonded and laminated using an adhesive 35 is prepared.

[0100] In this embodiment, film stack samples are prepared with different lamination methods and gap widths of film-like parts, and gas sterilization evaluation, visual visibility judgment (transmittance %, haze %), peeling ease evaluation, and peeling risk of moth-eye structure during film peeling (hereinafter also referred to as "contamination evaluation") are carried out.

[0101] The evaluation sample used for gas sterilization evaluation is a 100×100 mm film component, and a seal (sterilization label EO-L manufactured by NOF Giken Kogyo Co., Ltd.) is attached to the four corners and the center of the inner area of ​​the stacking means (hook component 34 or adhesive 35) at a total of five locations, with the characters "sterilized" appearing when reacting with EOG.

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

[0103] As a result, the case where the character "sterilized" appeared was evaluated as ○ (sterilization effect was achieved), and the case where the character "sterilized" did not appear was evaluated as × (no sterilization effect).

[0104] The transmittance [%] and haze [%] in the visual recognition judgment (transmittance [%], haze [%]) were determined using a haze meter (HM-150N) manufactured by Murakami Color Research Laboratory Co., Ltd. using a double-beam method (JIS K7361, JIS K7136). The visual recognition evaluation criteria were as follows: a case where the haze was less than 1.5% was evaluated as ○ (excellent), and a case where the haze was 1.5% or more was evaluated as × (poor).

[0105] Evaluation of Ease of Peeling The ease of peeling in the TD direction was evaluated by a sensory evaluation and was evaluated in the order of ease of peeling as ○ (excellent), △ (fair), and × (poor).

[0106] The contamination evaluation refers to the evaluation of the risk of moth-eye structure peeling when the film is peeled off, with ○ being the case where there is no risk of moth-eye structure peeling, × being the case where moth-eye structure peeling is clearly foreseen, and △ being the case where the risk of moth-eye structure peeling is unclear but foreseen 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 PET substrate having a thickness of 188 μm, a second film 32 having a moth-eye structure on a PET substrate having a thickness of 100 μm, and a third film 33 having a moth-eye structure on a PET substrate having a thickness of 100 μm through a hook member 34. In Example 1, the films were laminated by the hook member 34 in such a manner that no gap was generated between the first film 31 and the second film 32 and between the second film 32 and the third film 33 (the gap width was about 0 mm).

[0108] (Example 2) The film laminate sample according to Example 2 was the same as that of 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 0.038 mm.

[0109] (Example 3) The film laminate sample according to Example 3 was the same as that of 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 0.050 mm.

[0110] (Example 4) The film laminate sample according to Example 4 was the same as that of 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 0.075 mm.

[0111] (Example 5) The film laminate sample according to Example 16 was the same as that of 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 0.100 mm.

[0112] (Example 6) The film laminate sample according to Example 6 was the same as that of 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 0.150 mm.

[0113] (Example 7) The film laminate sample according to Example 7 was the same as that of 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 0.300 mm.

[0114] (Example 8) The film laminate sample according to Example 8 was the same as that of 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 0.500 mm.

[0115] (Example 9) The film laminate sample according to Example 9 was the same as that of 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 according to Example 10 was the same as that of 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 2.0 mm.

[0117] (Example 11) The film laminate sample according to Example 11 was the same as that of 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 3.0 mm.

[0118] (Comparative Example 1) Comparative Example 1 A film laminate sample was obtained by laminating a first film 31 composed of a PET substrate having a thickness of 188 μm, a second film 32 composed of a PET substrate having a thickness of 50 μm, and a third film 33 composed of a PET substrate having a thickness of 50 μm through the entire surface of an acrylic adhesive 35. Fig.19 As shown, in the film laminate sample according to Comparative Example 1, since the adhesive layer is interposed between the first film 31 and the second film 32 and between the second film 32 and the third film 33 , the gap width is 0 mm.

[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 PET substrate having a thickness of 188 μm, a second film 32 having a moth-eye structure on a PET substrate having a thickness of 100 μm, and a third film 33 having a moth-eye structure on a PET substrate having a thickness of 100 μm by full-surface bonding using an acrylic adhesive 35. In the film laminate sample according to Comparative Example 2, since the adhesive layer is interposed between the first film 31 and the second film 32 and between the second film 32 and the third film 33, the gap width is 0 mm.

[0120] (Comparative Example 3) Comparative Example 3 used a first film 31 having a moth-eye structure on a PET substrate having a thickness of 188 μm, a second film 32 having a moth-eye structure on a PET substrate having a thickness of 100 μm, and a third film 33 having a moth-eye structure on a PET substrate having a thickness of 100 μm, and provided an acrylic adhesive 35 on each side edge of the first film 31 to the third film 33 and laminated them to obtain a film laminate sample. Fig. 20 As shown, in the film laminate sample according to Comparative Example 3, one film is bent and bonded together 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 about 0 mm.

[0121] [Table 1]

[0122] As shown in Table 1, in the film laminate samples involved in Examples 1 to 11, the characters "sterilized" appeared on the seal, confirming the sterilization effect. In Example 1, even if no gap was seen at first glance between the first film 31 and the second film 32 and between the second film 32 and the third film 33 under side observation, they were not closely attached but slightly touched, and the sterilization gas was allowed to pass through the laminate. That is, it can be seen from this example that the sterilization effect is exerted by laminating the film-like parts with a certain gap (about 0 to 3 mm) between them.

[0123] In addition, the film stack samples involved in Examples 1 to 11 can peel off the first film 31, the second film 32 and the third film 33 by disengaging the hook part 34, and the contamination evaluation is ○, that is, no force is applied in the direction of peeling off the moth-eye structure formed on the film, and there is no risk of peeling.

[0124] In Comparative Example 3, in which the adhesive 35 is provided on one side edge of the first film 31 to the third film 33 and the films are laminated, the same sterilization effect as in Examples 11 to 11 is also confirmed, but the first film 31 to the third film 33 are laminated by the adhesive, so the contamination evaluation is △, that is, the force acts in the direction of peeling of the moth-eye structure formed on the film when the first film 31, the second film 32, and the third film 33 are peeled off, and there is a risk of peeling of the moth-eye structure. In addition, in Comparative Example 2, the adhesive 35 is provided on the entire surface of the first film 31 to the third film 33 and the films are laminated, so the contamination evaluation is ×, that is, the peeling of the moth-eye structure is clearly foreseen. Comparative Example 1 does not form a moth-eye structure on the first film 31 to the third film 33, and is therefore not subject to evaluation. Explanation of symbols

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

Claims

1. A film laminate comprising: A plurality of film-like members are laminated so as to be releasable; and a columnar protrusion member that protrudes in the stacking direction of the film-like member and holds the film-like member at a predetermined interval, On the outer peripheral surface of the protrusion member, a locking portion for locking the film-like member is provided at the predetermined interval. The film-like member has an insertion through hole through which the protrusion member is inserted and removed freely. The protrusion member is inserted through the insertion through hole and the film-like member is locked to the locking portion, so that the film-like members are held and stacked at a predetermined interval.

2. The film laminate according to claim 1, wherein: The locking portions are convex portions that protrude in the circumferential direction of the protruding member, and the film-like member is locked between the convex portions.

3. The film laminate according to claim 2, wherein: There are a plurality of the convex parts, and the diameters of the convex parts are gradually increased from the convex parts on the tip side to the convex parts on the root side of the protrusion part. The insertion through hole has an opening diameter corresponding to a diameter of the convex portion at the locking position of the film-like member.

4. The film laminate according to claim 2 or 3, wherein: The convex portion is cylindrical, annular or spherical.

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

6. The film laminate according to any one of claims 2, 3 and 5, wherein: The spherical convex portion is formed at least at a distal end of the protrusion member.

7. The film laminate according to any one of claims 1 to 3 and 5, wherein: The film-like member has one or more slits formed around the insertion through hole.

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

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

10. A method for producing a film laminate, comprising: a step of forming a film-like member having an insertion through hole; a step of forming a protrusion member having a locking portion for locking the film-like member; and A step of inserting the protruding member through the insertion through hole of the film-like member, locking the film-like member to the locking portion, and stacking a plurality of the film-like members while maintaining them at a predetermined interval.

11. The method for producing a film laminate according to claim 10, wherein: The method comprises the step of sterilizing the plurality of film-like members in a stacked state with the plurality of film-like members held at predetermined intervals.

12. A protective member, A protective member of the film laminate is mounted on a portion corresponding to the face or the periphery of the eyes of the user. The film stack is the film stack according to any one of claims 1 to 3 and 5.

13. The protective member according to claim 12, wherein: The protective piece is any one of protective clothing, a mask, an eye mask, and a helmet.

14. A method for manufacturing a protective element, A method for producing a protective member in which a film laminate is mounted on a portion corresponding to the face or the periphery of the eyes of a user, comprising: a step of forming a film stack; and The step of assembling the film laminate to the protective member, The film stack is the film stack according to any one of claims 1 to 3 and 5.

Images