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

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 breakage of a film surface structure. The present invention is provided with a plurality of film-like members (2) that are laminated so as to be releasable, a first engagement member (6) that is affixed to one of a pair of film-like members (2), and a second engagement member (9) that is affixed to the other of the pair of film-like members (2), and the pair of film-like members (2) are laminated so as to be spaced apart from a gap by the first engagement member (6) and the second engagement member (9) being engaged so as to be releasable. The engagement portion of the first engagement member (6) and the second engagement member (9) has air permeability.

Description

Technical Field

[0001] The present technology relates to a film laminate having a plurality of film-like components stacked at predetermined intervals, a method for manufacturing the film laminate, a protective device using the film laminate, and a method for manufacturing the protective device. This application is an invention claiming priority based on Japanese patent application No. 2022-082367 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 in medical practitioners, personal protective equipment is often used. In particular, protective equipment such as masks or protective clothing to prevent exposure to blood or body fluids are used during examinations or surgeries, and are useful for preventing occupational infection caused by blood-borne pathogens (HIV, HBV, HCV) or coronaviruses (SARS-CoV-2, etc.).

[0003] However, such protective equipment is sometimes contaminated by blood or body fluids scattered from a patient during an examination or operation. Thus, in an environment where contaminants are flying, it is required to avoid contact with the contaminants and simultaneously seek to quickly restore the field of vision.

[0004] In addition, helmet visors used in motorcycle or four-wheeled automobile racing competitions, and protective glasses for painting used in painting operations, etc., often have a similar problem that their surfaces become dirty and obstruct vision.

[0005] In order to solve such a problem, a plurality of easily peelable protective films are previously laminated on the surface of the helmet shield or the protective glasses for painting, and when the field of vision is obstructed by dirt, the following operation is performed: the topmost protective film is peeled off together with the dirt to restore the field of vision. Regarding this technology, for example, Patent Document 1 discloses a protective device for the shield portion of a helmet in which a plurality of sheet-like protective covers (i.e., disposable visors) are attached in a manner covering the shield portion of the helmet.

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

[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 device having excellent visibility by utilizing the low reflectivity characteristics of a film have been proposed (Patent Document 2).

[0008] like Fig.35 , Fig.36As shown, the laminate described in Patent Document 2 comprises a plurality of film-like parts having a moth-eye structure with projections and depressions formed by a pitch below the wavelength of visible light provided on at least one surface of a substrate, and at least the ends of the film-like parts are fixed via an adhesive layer so as to be laminated in a removable manner. Fig.35 The laminate shown has an adhesive layer only at the end of the film-like part. Fig.36 The laminate shown is provided with an adhesive layer 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 or 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 dirt obstructs the field of vision, 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 using a protective device that laminates such film-like components in medical applications, the surface of each film-like component is sterilized by gas sterilization, etc. And, if the contaminated top film-like component is peeled off, a new sterile surface can be exposed on the outermost surface.

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

[0013] exist Fig.35 In the structure shown, the central part of the film without the adhesive layer can achieve the sterilization effect, but the outer edge of the film provided with the adhesive layer cannot be sterilized. Fig.35 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.36 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 through which the adhesive layer is interposed cannot be sterilized.

[0014] Therefore, if the contaminated uppermost film member is peeled off, the film member that has not been sterilized partially or the film member that has not been sterilized over the 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 in a laminate design using an adhesive, the moth-eye structure may be damaged due to adhesive force when each film-like member is peeled off.

[0016] Therefore, an object of the present technology is to provide a film stack, a method for producing the film stack, a protective device, and a method for producing the protective device, 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 membrane stack involved in the present technology has a plurality of membrane-like parts that are stacked so as to be peeled off, and a first engaging part fixedly connected to one of a pair of the above-mentioned membrane-like parts and a second engaging part fixedly connected to the other of the pair of the above-mentioned membrane-like parts. The pair of the above-mentioned membrane-like parts are stacked with gaps therebetween by the first engaging part and the second engaging part being engaged and detached from each other, and the engaging portions of the first engaging part and the second engaging part are breathable.

[0018] In addition, the manufacturing method of the film stack involved in the present technology includes: a process of forming a film-like component; a process of forming a first engaging component and a second engaging component that can be freely engaged and disengaged; a process of fixing the above-mentioned first engaging component to a position of one of the pair of film-like components opposite to the other film-like component and fixing the above-mentioned second engaging component to a position of the other of the pair of film-like components opposite to the above-mentioned one film-like component; and a process of locking the above-mentioned first engaging component and the above-mentioned second engaging component and stacking the pair of film-like components with a gap therebetween.

[0019] In addition, the protective device according to the present technique is a protective device 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 device involved in the present technology, in the manufacturing method of the protective device in which a film stack is installed around the face or eyes of the user, there is a step of forming the film stack and a step of installing the film stack on the protective device, 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 include the first and second engaging parts, and the entire front and back surfaces of each film-like part can be exposed to the sterilization gas. When the film-like part is peeled off, the newly exposed film-like part and the first engaging part or the second engaging part fixed to the film-like part are also sterilized. In addition, the peeling of the film-like part can be performed only by unfastening the first and second engaging parts, so there is no risk of damaging the moth-eye structure formed on the film-like part. 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 This is a cross-sectional view of a film stack to which the present technology is applied. Figure 3 is a cross-sectional view showing a ring member. Figure 4 is a cross-sectional view showing a hook member. Figure 5 This is a diagram schematically showing a configuration in which a loop member and a hook member are fixed linearly to left and right side edge portions of a substantially rectangular film-like member. Figure 6 The figure schematically shows a structure in which a loop member and a hook member are fixed to the left and right side edge portions of a substantially rectangular film-like member in the shape of a dotted line. Figure 7 This is a diagram schematically showing a structure in which a loop member and a hook member are fixed linearly to upper and lower side edge portions of a substantially rectangular film-like member. Figure 8 The figure schematically shows a structure in which a loop member and a hook member are fixed to upper and lower side edge portions of a substantially rectangular film-like member in the shape of dotted lines. Fig. 9 This is a diagram schematically showing a configuration in which a loop member and a hook member are fixedly connected so as to surround the entire side edge portion of a substantially rectangular film-like member. Fig.10 The cross-sectional view schematically shows a structure in which the width of the loop member and the hook member stacked on the uppermost film member and the middle film member is narrower than the width of the loop member and the hook member stacked on the middle film member and the lower film member, and the peeling force is relatively lower. Fig.11 This is a cross-sectional view of a film-like member constituting a film laminate to which the present technology is applied. Fig.12 This is a cross-sectional view of another film-like member constituting the film laminate to which the present technology is applied. Fig.13 This is a perspective view of another film-like member constituting the film laminate to which the present technology is applied. Fig.14This 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.15 The drawings are cross-sectional views showing the process of forming an anti-reflection layer composed of a moth-eye structure, wherein (A) shows a state in which the surface of the transfer material coated with a substrate is brought into close contact with a roller master, (B) shows a film-like component on which the moth-eye structure is transferred on one side, (C) shows a state in which the transfer material is applied to the other side of the film-like component on which the moth-eye structure is transferred on one side and brought into close contact with the roller master, and (D) shows a film-like component on which the moth-eye structure is transferred on both sides. Fig.16 This is a perspective view showing the appearance of a medical protective suit shown as an example of protective equipment. Fig.17 The diagram is a cross-sectional view showing an example of a process of assembling a film laminate to a protective device, wherein (A) shows a state before assembling and (B) shows a state after assembling. Fig.18 This is a cross-sectional view showing an example of a process of attaching the film laminate to the protective device using a loop member and a hook member instead of bonding using an adhesive layer. Fig.19 This is a cross-sectional view showing another example of the process of attaching the film stack to the protective device. Fig. 20 This is a cross-sectional view showing another example of the process of attaching the film laminate to the protective device using a loop member and a hook member instead of bonding using an adhesive layer. Fig.21 The present invention is a cross-sectional view showing an example of a process of forming a film stack and assembling it to a protective device, wherein (A) shows a state where the bottom film-like component is connected to an opening of the protective device, (B) shows a state where the film-like component with the middle layer is stacked, and (C) shows a state where the film-like component with the top layer is stacked. Fig. 22 The present invention is a cross-sectional view showing another configuration example of a film laminate to which the present technology is applied, wherein (A) shows a state before lamination of film-like members, and (B) shows a state after lamination of film-like members. Fig.23 It shows that Fig. 22 The film stack shown is a cross-sectional view of a process of assembling the film stack to the protective device, wherein (A) shows the state of the film stack before assembly, and (B) shows the state of the film stack after assembly. Fig.24 It is a cross-sectional view showing an example of a snap button as a configuration example of the first and second engagement members. Fig.25The figures show another example of the configuration of the concave component and the convex component, (A) is an exploded stereoscopic view of the concave component and the convex component, (B) is a stereoscopic view showing the process of inserting the protrusion of the substrate into the hole penetrating the film-like component, (C) is a stereoscopic view showing the process of fitting the cover of the concave component into the protrusion, and (D) is a stereoscopic view showing the process of fitting the cover of the convex component into the protrusion. Fig.26 It is shown that the use Fig.25 Figures of a membrane stack in which film-like parts are stacked by concave parts and convex parts are shown, (A) is a side view showing the process of stacking a membrane-like part to which a concave part is fixed and a membrane-like part to which a convex part is fixed, (B) is a side view showing a membrane stack composed of two layers of membrane-like parts, and (C) is a side view showing a membrane stack composed of three layers of membrane-like parts. Fig. 27 It is a plan view showing an example of a fastener as a configuration example of the first and second engagement members. Fig.28 It is a diagram for explaining the structure of the film laminate sample according to the first embodiment. Fig.29 It is a perspective view showing a method for measuring peel strength. Fig.30 The figures are used to illustrate the structure of the film laminate sample involved in the first embodiment, (a) shows an example of using a loop member and a hook member of the same size as the film member, and (b) shows an example of using a loop member and a hook member with the size of the base material reduced by half. Fig.31 This is a diagram for explaining the configuration of a film laminate sample in which a loop member and a hook member are provided at both ends in the longitudinal direction of a film-like member. Fig.32 This is a diagram for explaining the configuration of a film laminate sample in which loop members and hook members are provided so as to surround all four sides of a film-like member. Fig.33 The photographs show the results of a sterilization test on a film laminate sample in which loop members and hook members were provided so as to surround all four sides of a film-like member. Fig.34 The photographs show the results of a sterilization test on a film laminate sample in which an adhesive was provided so as to surround all four sides of a film-like member. Fig.35 This is a cross-sectional view showing a stacked body in which a plurality of film-like members are stacked via an adhesive layer provided at the end portions of the film-like members. Fig.36 This 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 members. DETAILED DESCRIPTION

[0023] Hereinafter, with reference to the accompanying drawings, the film stack, the method for manufacturing the film stack, the protective device, and the method for manufacturing the protective device 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 ratios. 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] The film laminate 1 to which the present technology is applied has a plurality of film-like parts 2 that are stacked so as to be peeled off freely, a first engaging part that is fixed to one of the film-like parts 2 in a pair of film-like parts 2 that are stacked adjacently, and a second engaging part that is fixed to the other film-like part 2 that is opposite to the one film-like part. The film-like part 2 is a transparent sheet with flexibility. The first engaging part and the second engaging part engage and engage so as to be disengaged freely. Thus, a pair of film-like parts 2 that are stacked adjacently are stacked with a gap. The first engaging part and the second engaging part are not tightly attached, but are partially engaged, and have a gap in the engaging part and are breathable. That is, the film laminate 1 is stacked with a plurality of film-like parts 2 with a gap, and the engaging parts of the first and second engaging parts of each film-like part 2 are not closed.

[0025] Therefore, the film stack 1 can include the first and second snap-fitting parts and expose the entire front and back surfaces of each film-like part 2 to the sterilization gas. When the film-like part 2 is peeled off, the newly exposed film-like part 2 and the first snap-fitting part or the second snap-fitting part fixed to the film-like part 2 are also sterilized.

[0026] Moreover, in medical applications, when the surface is dirty due to blood or body fluids scattered from the patient during an examination or operation, by peeling off the topmost film-like member 2, it is possible to avoid contact with pollutants and at the same time seek to quickly restore the field of vision. At this time, the exposed surface of the film-like member 2 exposed by peeling off and the first and second engaging members of the film laminate 1 are sterilized, thereby reducing the risk of infection to the patient or the examinee, other medical personnel, etc. In addition, the back side of the peeled film-like member 2 is also sterilized, so that when peeling off or discarding, the unsterilized part will not be exposed to the patient or the examinee, medical personnel, etc.

[0027] [First and second engaging parts] Figure 1 , Figure 2The film stack 1 shown uses a ring component 6 having numerous rings 5 ​​erected on one side of a substrate 4 as a first engaging component, and a hook component 9 having numerous hooks 8 erected on one side of a substrate 7 and detachably engaged with the rings 5 ​​as a second engaging component.

[0028] In addition, the film-like part 2 is provided with one of the loop part 6 and the hook part 9 on one side, and the film-like part 2 of the middle layer is provided with the other side of the loop part 6 and the other of the hook part 9. In the drawings of the present application, for the sake of convenience, "6, 9" are marked to show that one or the other of the loop part 6 and the hook part 9 is provided on one side and / or the other side.

[0029] like Figure 3 As shown, the base material 4 of the ring member 6 is a sheet-shaped support for the ring 5 , with numerous fine rings 5 ​​standing upright on one surface, and the other surface opposite to the one surface serves as a fixing surface fixed to the film-like member 2 .

[0030] like Figure 4 As shown, the base material 7 of the hook member 9 is a sheet-shaped support for the hook 5, with numerous fine hooks 8 erected on one side, and the other side opposite to the one side serves as a fixing surface fixed to the membrane member 2. The hook 5 has a shape that can be engaged with the ring 5, such as a hook shape or a mushroom shape, but is not limited to these.

[0031] In the film laminate 1, one of a pair of film-like members 2 stacked adjacently is fixed with a base material 4 having a loop member 6 by a fixing material 10 such as an adhesive or an adhesive tape, and the other film-like member 2 facing the one film-like member 2 is fixed with a base material 7 having a hook member 9 by a fixing material 10. In addition, the loop member 6 and the hook member 9 are arranged at opposing positions when the film-like members 2 are stacked.

[0032] By overlapping the membrane member 2 to which the ring member 6 is fixed and the membrane member 2 to which the hook member 9 is fixed, the hook 8 is engaged with the ring 5. Thus, the membrane member 2 and the other membrane member 2 are held and stacked with a gap therebetween, and sterilization treatment using sterile gas can be performed. In addition, even if no gap is seen between the membrane member 2 and the other membrane member 2 at first glance when viewed from the side, this is not close contact, but a slight degree of contact, and the membrane member 2 is stacked in a manner that allows the sterile gas to pass.

[0033] In addition, the ring member 6 and the hook member 9 are members in which the base materials 4 and 7 are not in close contact with each other, but the ring 5 and the hook 8 erected on the base materials 4 and 7 are partially engaged, and there is a gap between the ring member 6 and the hook member 9 to provide air permeability. Therefore, the film stack 1 can ventilate the sterilizing gas in the state where the ring member 6 and the hook member 9 are engaged (that is, in the state where the film-like member 2 is stacked). Therefore, even when the film stack 1 is fixedly connected to the ring member 6 and the hook member 9 in a manner surrounding the outer edge of the film-like member 2, the surface of the film-like member 2 on the inner side can be sterilized.

[0034] The film member 2 is peeled off by releasing the engagement of the ring member 6 and the hook member 9. At this time, the sterilized surface of the film member 2 can be exposed. In addition, the engagement portion of the air-permeable ring member 6 and the hook member 9 is also sterilized, so the sterilized ring member 6 and the hook member 9 are exposed.

[0035] As such loop members 6 and hook members 9, for example, mechanical fasteners manufactured by 3M Co. or so-called surface fasteners can be used.

[0036] [Fixed position] The ring member 6 and the hook member 9 can stably hold and stack the film member 2 with a gap, and do not interfere with the user's field of vision in the film member 2 during use. In addition, the ring member 6 and the hook member 9 are arranged at such a position and in such a number that a peeling operation can be easily performed. From such a viewpoint, the ring member 6 and the hook member 9 are preferably formed in a strip shape and arranged at the side edge of the film member 2.

[0037] The fastening pattern can be determined according to the shape or purpose of the protective device to be installed. Figure 5 As shown in FIG. 1 , the right and left side edges of the substantially rectangular film-like member 2 may be fixedly connected in a linear manner. Figure 6 As shown in FIG. 1 , the left and right side edges of the substantially rectangular film-like member 2 may be fixedly connected in a dotted line. Figure 7 As shown in FIG. 1 , the upper and lower side edges of the substantially rectangular film-like member 2 may be fixedly connected in a linear manner. Figure 8 As shown in FIG. 1 , the upper and lower side edges of the substantially rectangular film-like member 2 are fixedly connected in a dotted line shape. Fig. 9 As shown in the figure, the side edge of the membrane member 2 is fixedly attached in a manner that surrounds the entire periphery. Figures 5 to 9 The diagram schematically shows a pattern of fastening loop members 6 and hook members 9 for stacking film members 2. The loop member 6 or hook member 9 is fastened to one or both of the front and back surfaces of the film member 2 in accordance with the stacking position.

[0038] In addition, a plurality of loop members 6 and hook members 9 may be fixed in parallel to the side edge of the film member 2. The formation positions and numbers of the loop members 6 and hook members 9 are not limited to the above positions and numbers, and are appropriately set according to the configuration and use of the assembly protection device 21 or the film laminate 1.

[0039] In addition, the peeling force required for peeling of each band-shaped ring member 6 and hook member 9 may be the same or different. For example, when the band-shaped ring member 6 and hook member 9 are fixed in a dotted line shape, a ring member 6 and hook member 9 having a relatively strong peeling force relative to the ring member 6 and hook member 9 fixed in the middle part may be used for the ring member 6 and hook member 9 fixed near the corner of the film-shaped member 2, or when the band-shaped ring member 6 and hook member 9 are fixed to the upper and lower side edges, a relatively wide ring member 6 and hook member 9 may be fixed to the upper side edge, and a relatively narrow ring member 6 and hook member 9 may be fixed to the lower side edge, etc., so that the peeling force is different for each part. In addition, the peeling force may be different for each part by changing the hook shape, changing the width, etc. on one band-shaped ring member 6 and hook member 9.

[0040] Alternatively, the belt-like ring member 6 and the hook member 9 may be mixed on one surface of the film-like member 2. In this case, the belt-like ring member 6 and the hook member 9 are mixed on the opposing film-like member 2 and arranged to face each other.

[0041] [Peel force] The film laminate 1 preferably has a peeling force of the ring member 6 and the hook member 9 for stacking the film-like members 2 of the upper layer on each other lower than the peeling force of the ring member 6 and the hook member 9 for stacking the film-like members 2 of the lower layer on each other. Thus, when the film-like member 2 of the upper layer is peeled off, the ring member 6 and the hook member 9 for holding and stacking the film-like member 2 of the lower layer can be prevented from being peeled off, and the film-like member 2 of the lower layer can be prevented from being peeled off together.

[0042] The peeling force between the film members 2 can be adjusted by making the hook shapes of the loop members 6 and the hook members 9 provided between the film members 2 different, changing the width or the number of the loop members 6 and the hook members 9 to change the fastening area, and the like. Fig.10 It is a cross-sectional view schematically showing the following structure: the width of the ring part 6 and the hook part 9 stacked on the top film part 2 and the middle film part 2 is narrower than the width of the ring part 6 and the hook part 9 stacked on the middle film part 2 and the lower film part 2, and the peeling force is relatively lower. Fig.10 The film laminate 1 shown can prevent the film-like member 2 of the intermediate layer from being peeled off when the film-like member 2 of the uppermost layer is peeled off.

[0043] Furthermore, the fixing force of the fixing material 10 fixing the ring member 6 and the hook member 9 to the film member 2 is higher than the peeling force between the film members 2 of the film laminate 1. Therefore, when the film member 2 is peeled off, the ring member 6 and the hook member 9 will not peel off at the interface with the film member 2. In addition, when the film member 2 is peeled off, the fixing material 10 itself will not cause cohesion failure between the fixing layers.

[0044] [other] In the above, the ring member 6 and the hook member 9 are used as the first and second engaging members for holding and stacking the film-like member 2, but if the above-mentioned effects are achieved, the first engaging member may be changed to the hook member 9. That is, the film-like member 2 may be held and stacked by the engagement of the hook members 9 with each other.

[0045] [Membrane parts] The film member 2 is a transparent sheet having flexibility. The shape of the film member 2 is not particularly limited, and can be, for example, Figure 1 The substantially rectangular shape shown in the figure is appropriately selected according to the protective device 21 to which it is applied.

[0046] As described above, the loop member 6 or the hook member 9 is provided at the side edge of the film-like member 2. Specifically, the loop member 6 or the hook member 9 is provided on the back of the film-like member 2 of the uppermost layer, and the loop member 6 or the hook member 9 is provided on the front and back of the film-like member 2 of the middle layer. The loop member 6 or the hook member 9 is provided on the front of the film-like member 2 of the lowermost layer, and the loop member 6 or the hook member 9 is appropriately provided on the back in accordance with the form of being assembled to the protective device 21.

[0047] The film-like member 2 may also be provided with a tab 20 for peeling at the outer edge. The tab 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 tab 20. Thus, peeling off the film-like member 2 of the uppermost layer can be promoted, and the film-like member 2 of the middle layer can be prevented from being peeled off together with the film-like member 2 of the upper layer by mistake.

[0048] As a means for identifying the film-like member 2 of the uppermost layer, the size of the tongue 20 is reduced in order from the uppermost layer. Figure 1 As shown, the tongue 20 formed on the uppermost membrane part 2 is formed larger than the tongue 20 of the membrane part 2 on the lower layer, and the tongue of the membrane part 2 on the lower layer is hidden, so that it is easy to always grasp only the tongue 20 of the membrane part 2 on the uppermost layer, and it is possible to prevent the tongue 20 of the membrane part 2 on the lower layer from being grasped by mistake.

[0049] In addition, for example, the position where the tongue 20 is formed may be changed for each film-like member 2. For example, the film-like member 2 of the uppermost layer may have the tongue 20 formed at the right edge in front view, and the film-like member 2 of the middle layer may have the tongue 20 formed at the left edge in front view. Thus, by first grasping the tongue 20 at the right edge, the film-like member 2 of the uppermost layer can be peeled off, and the film-like member 2 of the middle layer can be prevented from being peeled off by mistake.

[0050] Alternatively, identification may be performed by changing the color of the tab 20 or processing physical features such as concave and convex marks or openings or cutouts for each film-like member 2. In addition, the above-mentioned identification means may be combined.

[0051] In addition, regarding the film laminate 1, the film-like members 2 constituting each layer may be all the same film-like members, or may be film-like members with different functions or optical characteristics. This is appropriately selected according to the purpose of the protective device 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 device 21.

[0052] [Moth Eye Structure] Here, the film-like member 2 is preferably provided with a plurality of structures at a pitch less than the wavelength of visible light on at least one surface of a flexible transparent substrate, thereby providing 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 uses the film-like member 2 having the moth-eye structure, so that the visual recognition is not impaired even if the film-like member 2 is laminated.

[0053] like Fig.11 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 the opposite surface and back surface. A plurality of structures 12 are regularly arranged on the surface and back surface of the substrate 11 in a manner of forming a plurality of rows on the base layer 13. That is, the surface and back surface of the film-like member 2 have a concave-convex shape using 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.

[0054] The film member 2 can provide the protective device 21 equipped with the film laminate 1 with an optical adjustment function with low 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 device 21 with excellent visibility.

[0055] Here, the so-called "optical adjustment function" refers to the optical adjustment function of the transmission characteristic or the reflection characteristic. The film-like member 2 as an optical element is preferably transparent to visible light, for example, and its refractive index n is preferably in the range of 1.30 to 2.00, and more preferably in the range of 1.34 to 2.00. However, it is not limited thereto.

[0056] 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.

[0057] exist Fig.11 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.

[0058] In addition, if Fig.12 As shown, the film laminate 1 may not include the base layer 13 , but may use a film-like member 2 in which a moth-eye structure using a plurality of structures 12 is directly formed on a base 11 .

[0059] Furthermore, if Fig.13 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.13 The film-like member 2 shown has structures 12 integrally formed on both surfaces of a base 11 .

[0060] [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 the material is not particularly limited to these materials.

[0061] When a plastic material is used as the substrate 11, in order to further improve the surface energy, coating properties, smoothness, flatness, etc. of the surface of the plastic material, a primer layer (not shown) may be 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.

[0062] When the substrate 11 is a plastic film, the substrate 11 can be obtained by, for example, stretching the above-mentioned resin or diluting it in a solvent to form a film and drying it. The thickness of the substrate 11 is preferably appropriately selected according to the purpose of the film-like member 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.

[0063] 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.

[0064] [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.

[0065] As described later, the structure 12 is formed by transferring the pattern to the 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 .

[0066] 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.

[0067] 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 hydrophobicity and hydrophilicity separately according to the application, a specific side can have an anti-fogging function.

[0068] As the energy-ray curable resin composition, an ultraviolet curable resin composition is preferably used. In addition, the energy-ray curable resin composition may contain a filler, a functional additive, etc. as needed.

[0069] The ultraviolet curable resin composition contains, for example, acrylate and an initiator.

[0070] The ultraviolet curable resin composition contains, for example, a monofunctional monomer, a bifunctional monomer, a polyfunctional monomer, and the like. Specifically, the following materials are used alone or in combination.

[0071] 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.

[0072] Examples of the “difunctional monomer” include tri(propylene glycol) diacrylate, trimethylolpropane-diallyl ether, and urethane acrylate.

[0073] Examples of the “polyfunctional monomer” include trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, and ditrimethylolpropane tetraacrylate.

[0074] 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.

[0075] 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.

[0076] 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 .

[0077] Examples of the “functional additive” include a leveling agent, a surface conditioner, and a defoaming agent.

[0078] As the structure 12, a moth-eye structure composed of fine concave-convex structures is formed, so that the film laminate 1 has a high anti-reflection function. Here, the anti-reflection performance of the film laminate 1 is less than 5% when the surface and the back are combined, 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. In addition, the film laminate 1 has an anti-reflection layer, which is composed of a moth-eye structure of a plurality of structures formed on a transparent substrate 11 with a spacing less than the wavelength of visible light as the structure 12. The film laminate 1 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.

[0079] 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, which constitute the anti-reflection layer formed of the moth-eye structure, from a hydrophilic resin.

[0080] Furthermore, the film laminate 1 can provide a more excellent antireflection performance by forming an antireflection layer composed of a moth-eye structure on both surfaces of the transparent substrate 11 .

[0081] [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.

[0082] [Roller Master] like Fig.14 As shown, the roller master 41 has, for example, a cylindrical or cylindrical shape, and its cylindrical surface or cylindrical surface is set as a molding surface for molding a plurality of structures 12 on the surface of the substrate. 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.

[0083] 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.

[0084] [Transfer process 1] like Fig.15 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.15 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.

[0085] The energy ray source 37 is not particularly limited to any energy ray source that can emit 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.

[0086] [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.15 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.15 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.

[0087] 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.

[0088] 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.

[0089] [Shape forming process] The film-like member 2 obtained in the above is cut into a predetermined shape according to the protective device 21 to be mounted, and the tongue 20 is processed as appropriate. The tongue 20 can be processed using a numerically controlled cutting machine, a laser processing device, a punching cutting device, etc. If punching cutting is used, cutting into a predetermined shape and physical processing of the tongue 20 can be performed in one process, which is suitable.

[0090] [Lamination process] Next, the ring member 6 and the hook member 9 are fixed to each film-like member 2 in a predetermined pattern by a fixing material 10 such as an adhesive or an adhesive tape. Next, the film-like members 2 are stacked by engaging the ring member 6 and the hook member 9 of a pair of adjacently stacked film-like members 2. Thus, a film laminate 1 is obtained. There is no particular restriction on the number of layers of the film-like member 2 as long as it is multi-layered, and it can be set according to the purpose of the protective device. However, the more layers are overlapped, the greater the impact on the optical properties, so in applications requiring a clear field of view, the fewer layers, the better. In addition, in medical applications, there is also a situation where hygiene is emphasized and the film laminate 1 or the protective device 21 as a whole becomes a disposable product, so the number of stacked sheets is preferably 2 to 3 layers.

[0091] [Sterilization process] Next, the film stack 1 is sterilized. For the sterilization, gas sterilization using ethylene oxide gas or radiation sterilization using gamma rays or the like can be used. The film stack 1 has gaps between the film members 2. In addition, the ring member 6 and the hook member 9 are members in which the base materials 4 and 7 are not in close contact with each other, but the ring 5 and the hook 8 erected on the base materials 4 and 7 are partially engaged, and there is a gap between the ring member 6 and the hook member 9 to provide air permeability. Therefore, the film stack 1 can be ventilated with sterilizing gas in a state where the ring member 6 and the hook member 9 are engaged (i.e., in a state where the film members 2 are stacked).

[0092] Therefore, the entire exposed surface of the film member 2 and the engaging portion between the loop member 6 and the hook member 9 can be exposed to the sterilizing gas. Furthermore, even when the film member 2 is formed of a material that is impermeable to sterilizing gas such as ethylene oxide gas, the entire exposed surface of the film laminate 1 can be fully sterilized.

[0093] The sterilization treatment is performed after the film stack 1 is formed and before it is attached to the protective device 21 described later. However, the sterilization treatment may be performed after it is attached to the protective device 21 or simultaneously with the protective device 21 , or may be performed in sequence of the two.

[0094] When the film laminate 1 is used, if the uppermost film member 2 is peeled off due to contamination, the lower film member 2 is exposed. The entire exposed surface of the newly exposed film member 2 including the loop member 6 and the hook member 9 is sterilized, thereby reducing the risk of infection to patients, examinees, other medical personnel, etc.

[0095] In addition, the film-like member 2 can be peeled off simply by releasing the engagement between the ring member 6 and the hook member 9, 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 cohesive damage between the adhesive layers occurs during peeling, so the moth-eye structure may be damaged due to the bonding force, resulting in a risk of adversely affecting the visual field. In addition, the occurrence of scattering of adhesive layer residues or generation of gas from the adhesive layer is not preferred, particularly in medical settings.

[0096] 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 caused by the destruction of the welded parts is not preferable, especially in medical fields.

[0097] The film laminate 1 does not use an adhesive, and the film-like member 2 is not welded, so there is no risk caused by these, and it can be used safely. In addition, the film laminate 1 has a plurality of film-like members 2 stacked with gaps, and the portions of each film-like member 2 to which the ring member 6 and the hook member 9 are fixed are not exposed to the outside, and the sterilized ring member 6 and the hook member 9 are exposed. Therefore, the film laminate 1 can include the first and second engaging members to expose the entire front and back surfaces of each film-like member 2 to the sterilization gas, and when the film-like member 2 is peeled off, the portions of the newly exposed film-like member 2 that have not been sterilized are not exposed.

[0098] [Protect your device] The film laminate 1 is mounted on a protective device 21. The protective device 21 is not particularly limited as long as it has the purpose of ensuring a field of vision by peeling off the film-like member 2, and examples thereof include medical protective clothing (work clothes), medical masks, medical eye masks, medical displays, helmet visors, protective glasses for painting, chemical protective clothing used in disasters, and the like.

[0099] The protective device 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 device 21. Moreover, when the surface of the film laminate 1 is contaminated during the use of the protective device 21, by peeling off the film-like member 2 of the top layer, it is possible to avoid contact with pollutants and at the same time seek to quickly restore the field of vision. The exposed surfaces of the film-like members 2 of each layer of the film laminate 1 including the ring member 6 and the hook member 9 are sterilized, so that the sterilized surface is always exposed 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 back side of the peeled film-like member 2 is also sterilized, so that when peeling or discarding, the unsterilized part will not be exposed to the patient, the examinee, the medical personnel, etc.

[0100] The method of assembling the film stack 1 is not particularly limited, and may be appropriately determined according to the specification of the protective device 21 to which it is applied. Fig.16 2 is a perspective view showing the appearance of a medical protective suit as an example of the protective equipment 21. Fig.16 As shown, the protective device 21 is provided with an opening 22 at a position corresponding to the face of the user, and the film laminate 1 is mounted in the opening 22 . Fig.17 The film laminate 1 shown in (A) is composed of three film members 2, and the film member 2b of the middle layer and the film member 2c of the uppermost layer are laminated from the film member 2a of the lowermost layer (i.e., the film member 2a disposed closest to the user's face) via the loop member 6 and the hook member 9. In addition, the number of laminated film members 2 constituting the film laminate 1 involved in the present technology is not limited to three layers.

[0101] The film members 2a, 2b, and 2c are stacked with gaps therebetween, and the loop members 6 and the hook members 9 are also air-permeable, so that the entire surface of the portion exposed to the outside can be sterilized at the initial use of the film stack 1 or when the film members 2 are peeled off. In addition, the film members 2a, 2b, and 2c are not closely attached to each other, but are slightly in contact with each other, and are stacked so that sterilizing gas can pass through, even if no gap is seen between one film member 2 and another film member 2 at first glance when viewed from the side.

[0102] like Fig.17 As shown in (A), the bottom film component 2a of the film laminate 1 is formed larger than the opening 22. In addition, an adhesive layer 23 using a double-sided tape or the like is provided on the outer edge of the back side of the opening 22. Furthermore, the film laminate 1 allows the top film component 2a and the middle film component 2 to pass through the opening 22 from the back side of the protective device 21, so that the bottom film component 2a is bonded to the periphery of the opening 22 via the adhesive layer 23. Thus, as shown in FIG. Fig.17 As shown in (B), the film laminate 1 can be mounted on a protective device 21 .

[0103] In addition, the ring member 6 or the hook member 9 provided on one surface is engaged with the hook member or the ring member provided on the other surface of the adjacently opposed film-like member 2, so that the film-like members 2 are stacked, but it is not determined which film-like member 2 is provided with the ring member 6 or the hook member 9. In the drawings of the present application, for the sake of convenience, they are marked as "6, 9" to show the state in which the ring member 6 provided on one film-like member 2 is engaged with the hook member 9 provided on the other film-like member 2.

[0104] In addition, if Fig.18 As shown, the loop member 6 and the hook member 9 may be used instead of the bonding using the bonding layer 23. Fig.18 In the structure shown, either the ring member 6 or the hook member 9 is provided at the outer edge of the back side of the opening 22 and the bottom film member 2a. In the drawings of the present application, for convenience, they are marked as "6, 9" to show that either the ring member 6 or the hook member 9 is provided. The other of the ring member 6 and the hook member 9 is provided at an opposite position.

[0105] In addition, if Fig.19 As shown, the bottom film member 2a may be mounted on the surface side of the protective device 21. In this case, an adhesive layer 23 using a double-sided tape or the like is provided on the outer edge of the surface side of the opening 22. The film laminate 1 has the bottom film member 2a bonded to the periphery of the opening 22 via the adhesive layer 23. Fig.19 In the structure shown in the figure, as the film-like member 2b of the middle layer and the film-like member 2c of the uppermost layer, a film-like member having a larger area than the opening 22 can be used. In addition, in the structure in which the film-like member 2a of the lowermost layer is mounted on the surface side of the protective device 21, as shown in FIG. Fig. 20 As shown, the loop member 6 and the hook member 9 may be used instead of the adhesive layer 23 .

[0106] In addition, if Fig.21 As shown, it is also possible to connect the membrane member 2a to the opening 22 of the protection device 21 ( Fig.21 (A)), the film-like member 2b of the intermediate layer is laminated ( Fig.21 (B)), then the topmost film member 2c is laminated ( Fig.21 (C)), thereby forming the film stack 1 and forming the protection device 21 including the film stack 1.

[0107] [Another Configuration Example 1 of Film Laminate] Next, another configuration example of the film laminate 1 will be described. Fig. 221 and 2 are cross-sectional views showing another configuration example of a film laminate to which the present technology is applied, wherein (A) shows a state before lamination of the film-like member 2 , and (B) shows a state after lamination of the film-like member 2 . Fig.23 It shows that Fig. 22 The illustrated cross-sectional views are of a process of assembling the film stack 25 to the protective device, wherein (A) shows the state of the film stack 25 before assembling, and (B) shows the state of the film stack 25 after assembling.

[0108] Fig. 22 The film stack 25 shown has a first engaging member as a concave member 26 provided on one film-like member 2, and a second engaging member as a convex member 27 provided on the other film-like member 2 and detachably engaged with the concave member 26. The concave member 26 and the convex member 27 are engaged with each other, so that the one film-like member 2 and the other film-like member 2 are held and stacked with a gap therebetween.

[0109] The concave member 26 and the convex member 27 are not in close contact, but are partially fitted, and there is a gap in the fitting portion of the concave member 26 and the convex member 27, which is air permeable. Therefore, the film laminate 25 can allow sterilization gas to pass between the concave member 26 and the convex member 27 in the state where the concave member 26 and the convex member 27 are fitted (that is, in the state where the film-like member 2 is stacked). The film-like member 2 is peeled off by unfastening the fitting of the concave member 26 and the convex member 27. At this time, the fitting portion of the concave member 26 and the convex member 27 having air permeability is sterilized, so that the sterilized concave member 26 and the convex member 27 are exposed.

[0110] As the female member 26 and the male member 27 that are engaged and disengaged, for example, Fig.24 The material of the female member 26 and the male member 27 is not particularly limited, and for example, a material made of resin or metal can be used.

[0111] The concave component 26 and the convex component 27 are arranged at opposite positions when the film-like component 2 is stacked. In addition, the concave component 26 and the convex component 27 are fixed to the film-like component 2 by a fixing material 10 such as an adhesive or an adhesive tape. The fixing force of the fixing material 10 is higher than the clamping force of the concave component 26 and the convex component 27. Therefore, when the film-like component 2 is peeled off, the concave component 26 and the convex component 27 in the embedded state will not be peeled off at the interface of one or the other film-like component 2, and the sterilized surface can be always exposed. In addition, when the film-like component 2 is peeled off, the fixing material 10 itself will not cause cohesion failure between the fixing layers.

[0112] The positions of the concave members 26 and the convex members 27 can be any positions as long as they can stably hold and stack the film-like member 2 with a gap, do not obstruct the user's field of vision when assembled on the protective device 21, and can easily perform the peeling operation of the film-like member 2. The positions of the concave members 26 and the convex members 27 can be set, for example, at the outer edge of the film-like member 2. In addition, the number of the concave members 26 and the convex members 27 is not particularly limited as long as the film-like member 2 can be stably stacked and held.

[0113] In addition, if Fig.23 As shown, the bottom film-like member 2a is bonded to the adhesive layer 23 provided on the outer edge of the back side of the opening 22, so that the film laminate 25 is mounted on the protective device 21, but the film laminate 25 can also be mounted on the surface side of the protective device 21. In addition, as a means of mounting the film laminate 25 on the back side or the surface side of the protective device 21, a concave member 26 and a convex member 27 can also be used instead of the adhesive layer 23.

[0114] [Another Configuration Example 2 of Film Laminate] The concave member 26 and the convex member 27 may be fixed to the film-like member 2 by sandwiching the film-like member 2 . Fig.25 The concave member 26 shown in (A) is composed of a base 26b having a protrusion 51 erected on a circular base plate 50 and a cover 26a having a fitting concave portion 53 formed around an insertion through hole 52 through which the protrusion 51 is inserted. The cover 26a has the insertion through hole 52 formed on the bottom surface of the fitting concave portion 53. The protrusion 51 of the base 26b is inserted into the hole ( Fig.25 (B)), insert the front end of the protrusion 51 into the insertion through hole 52 of the cover 26a from the opposite side ( Fig.25 (C)). The front end of the protrusion 51 is slightly thicker than the insertion through hole 52, and a slit is provided along the length direction, so that it has flexibility in the radial direction. Therefore, the front end of the protrusion 51 inserted through the insertion through hole 52 of the cover body 26a is engaged with the periphery of the insertion through hole 52, thereby sandwiching the membrane member 2 between the cover body 26a and the base 26b.

[0115] Fig.25 The convex member 27 shown in (A) is composed of a base 27b having a protrusion 56 erected on a base plate 55 and a cover 27a having a cylindrical fitting protrusion 57. The cover 27a has an insertion through hole on the bottom surface of the fitting protrusion 57 through which the protrusion 56 is inserted. The protrusion 56 of the base 27b is inserted through the hole ( Fig.25 (B)), insert the front end of the protrusion 56 into the insertion through hole of the cover 27a from the opposite side ( Fig.25(D)). The front end of the protrusion 56 has radial flexibility similar to the protrusion 51. Therefore, the front end of the protrusion 56 inserted through the insertion through hole of the cover body 27a is engaged with the periphery of the insertion through hole, thereby sandwiching the membrane member 2 between the cover body 27a and the base 27b.

[0116] The protruding portion that protrudes inward is provided at the open end of the fitting concave portion 53 of the female component 26. On the other hand, the protruding portion that protrudes outward is provided at the front end of the fitting convex portion 57 of the male component 27. Thus, when the fitting convex portion 57 is inserted through the fitting concave portion 53, the protruding portions engage, and the female component 26 and the male component 27 can be fitted.

[0117] Moreover, if Fig.26 As shown in (A), the concave member 26 is fixed to one of the adjacent film-like members 2, the convex member 27 is fixed to the other, and the concave member 26 and the convex member 27 are fitted together, so that the film-like members 2 can be stacked. Fig.26 As shown in (B), the fitting concave portion 53 of the concave member 26 and the fitting convex portion 57 of the convex member 27 are not in close contact, but are partially fitted, and there is also a gap between the covers 26a and 27a of the concave member 26 and the convex member 27, so that the film laminate 25 has air permeability. Therefore, in the state where the concave member 26 and the convex member 27 are fitted (that is, in the state where the film-like member 2 is stacked), the sterilized gas can be ventilated between the concave member 26 and the convex member 27. The film-like member 2 is peeled off by unfastening the fitting concave portion 53 of the concave member 26 and the fitting convex portion 57 of the convex member 27. At this time, the fitting parts of the concave member 26 and the convex member 27 having air permeability are sterilized, so that the sterilized concave member 26 and the convex member 27 are exposed.

[0118] Fig.26 (B) shows a film laminate 1 in which two film-like members 2 are laminated. Fig.26 (C) shows a film laminate 1 having three layers of film members 2. When three or more film members 2 are laminated, the concave members 26 and the convex members 27 are fixedly connected so that the fitting concave portions 53 or the fitting convex portions 57 face the outer sides of both surfaces of the film members 2 constituting the intermediate layer.

[0119] [Another Configuration Example 3 of Film Laminate] In addition, as the first and second engaging members that can be engaged and disengaged freely, the following may be used: Fig. 27The fastener 30 shown in the figure. In this case, one piece 30a of the fastener 30 is fixed along the side edge of one membrane member 2, and the other piece 30b of the fastener 30 is fixed along the side edge of the other membrane member 2. A pair of membrane members 2 are stacked with a gap between them by closing the fastener. In addition, the two pieces 30a and 30b of the fastener 30 are not tightly attached, but are engaged, and there is a gap in the engaging portion of the two pieces 30a and 30b to provide air permeability.

[0120] Therefore, the sterilizing gas can be ventilated in the state of closing the fastener 30 (i.e., in the state of laminating the film-like member 2). The film-like member 2 is peeled off by opening the fastener 30. At this time, the engaging portion of the air-permeable fastener 30 is sterilized, so that the two pieces 30a and 30b of the sterilized fastener 30 are exposed. Example

[0121] Next, embodiments of the present technology are described. In the following embodiments, as an embodiment sample, a film laminate sample in which the film-like member 2 is laminated using the ring member 6 and the hook member 9 as the first and second engaging members is prepared, and as a comparative example sample, a film laminate sample in which the film-like member 2 is bonded and laminated using an adhesive is prepared.

[0122] [First embodiment] In the first example, the structure of the film member and the lamination method of the film member were changed to measure and evaluate the peeling force (peel strength [N / 25mm]). In addition, the transmittance [%] and haze [%] of each film laminate sample were measured.

[0123] (Peel Strength) Each film laminate sample used in the peel strength test is a pair of rectangular film members (hereinafter referred to as "first film 31" and "second film 32"). The lamination method is set to use the loop member 6 and the hook member 9 of the base material 4, 7 having the same size as the first film 31 and the second film 32 or the film surface of the adhesive film 30 to be attached (refer to Fig.28 ).

[0124] The peel strength [N / 25mm] was determined by a 90° low-speed peel test using a dynamometer (DST-20N) manufactured by IMADA (refer to Fig.29 ). The measurement condition was set to a tensile speed of 200 mm / sec. The measurement sample size was set to 25×150 mm. The ease of peeling was sensory evaluated when peeling along the TD direction, and the order of ease of peeling was evaluated as ◎ (excellent), ○ (good), △ (average), and × (poor).

[0125] (Transmittance / haze) Transmittance [%] and haze [%] were obtained by a double beam method using a haze meter (HM-150N) manufactured by Murakami Color Research Laboratory Co., Ltd. (JIS K 7361, JIS K 7136). An integrating sphere of φ150 mm was used. The measurement sample was a film laminate in which both side edges of a first film and a second film of size 50×50 mm were laminated using a loop member 6 and a hook member 9 or an adhesive film 30 of 12.5 mm width.

[0126] (GAP) The width (mm) of the gap between the first film and the second film (ie, the void) was measured. The void was determined by subtracting the thickness of the first film and the second film from the thickness of the laminate sample using an M-type standard vernier caliper N30 manufactured by Mitutoyo Corporation.

[0127] (Example 1) In Example 1, a first film 31 having a moth-eye structure on a PET (Polyethyleneterephthalate) substrate having a thickness of 188 μm and a second film 32 having a moth-eye structure on a PET substrate having a thickness of 188 μm were stacked by a loop member 6 and a hook member 9 to obtain a film stack sample. In Example 1, a hook member 9 having a mushroom-shaped hook 5 (hereinafter sometimes referred to as "loop / hook 1") was used.

[0128] (Example 2) In Example 2, a first film 31 having a moth-eye structure on a PET substrate with a thickness of 188 μm and a second film 32 having a moth-eye structure on a PC (polycarbonate) substrate with a thickness of 150 μm are stacked using a ring component 6 and a hook component 9 (ring / hook 1) having a mushroom-shaped hook 5 to obtain a film stack sample.

[0129] (Example 3) In Example 3, a first film 31 having a moth-eye structure on a PC substrate with a thickness of 150 μm and a second film 32 having a moth-eye structure on a PC substrate with a thickness of 150 μm are stacked using a ring component 6 and a hook component 9 (ring / hook 1) having a mushroom-shaped hook 5 to obtain a film stack sample.

[0130] (Example 4) In Example 4, a first film 31 made of PET having a thickness of 188 μm and a second film 32 made of PET having a thickness of 188 μm were laminated via a ring member 6 and a hook member 9 having mushroom-shaped hooks 5 (ring / hook 1) to obtain a film laminate sample.

[0131] (Example 5) In Example 5, a first film 31 having a moth-eye structure provided on a PET substrate with a thickness of 188 μm and a second film 32 having a moth-eye structure provided on a PET substrate with a thickness of 188 μm were laminated by a loop member 6 and a hook member 9 to obtain a film laminate sample. In Example 5, a hook member 9 having a hook-shaped hook 5 (hereinafter sometimes referred to as "loop / hook 2") was used.

[0132] (Example 6) In Example 6, a first film 31 having a moth-eye structure on a PC substrate with a thickness of 150 μm and a second film 32 having a moth-eye structure on a PC substrate with a thickness of 150 μm are stacked using a ring component 6 and a hook component 9 (ring / hook 2) having a hook-shaped hook 5 to obtain a film stack sample.

[0133] (Comparative Example 1) In Comparative Example 1, a first film 31 having a moth-eye structure on a 188 μm thick PET substrate and a second film 32 having a moth-eye structure on a 188 μm thick PET substrate were laminated with adhesive films 30 attached to both side edges to obtain a film laminate sample.

[0134] [Table 1]

[0135] As shown in Table 1, the average peel strength of the film laminate samples according to Examples 1 to 4 using loop / hook 1 is lower than that of the film laminate samples according to Examples 5 and 6 using loop / hook 2. In addition, it can be seen that they are excellent in peeling ease. The hook member 9 according to loop / hook 1 has flexibility, and the mushroom shape of the hook 5 produces this flexibility, which is considered to contribute to the peeling ease.

[0136] The average value of the peel strength of the laminated body samples according to Comparative Example 1 using an adhesive is equivalent to that of the film laminated body samples according to Examples 1 to 4 using loops / hooks 1, but the variation is small. In the evaluation of the ease of peeling, the peel strength of Comparative Example 1 is felt to be higher than that of Examples 1 to 4. That is, it is known that the side with the variation in peel strength is superior in the ease of peeling.

[0137] In addition, when the same film substrate (PET) is used and Example 1 and Example 4 are laminated by loop / hook 1, the transmittance and haze are both superior to Example 1. Therefore, it can be seen that the visual recognition effect using the moth-eye structure is high. In addition, it can be seen that the transmittance is higher when the moth-eye structure is provided on the PC substrate than when the moth-eye structure is provided on the PET substrate.

[0138] [Second embodiment] In the second embodiment, the lamination method and the width dimension of the lamination method of the film-like member were changed, and the peeling force (peeling strength [N / 25mm]) was measured and evaluated. Each film laminate sample was formed by laminating a first film 31 having a moth-eye structure on a PET substrate having a thickness of 188μm and a second film 32 having a moth-eye structure on a PET substrate having a thickness of 188μm. The lamination method used a loop member 6 and a hook member 9 or an adhesive film 30. The size of the first and second films 31 and 32 was set to 25×150mm. The measurement conditions and evaluation conditions of the peeling strength were the same as those of the first embodiment described above.

[0139] (Example 1) like Fig.30 As shown in (a), Example 1 used loop / hook 1 with a substrate size of 25×150 mm to obtain a film laminate sample.

[0140] (Example 7) In Example 7, Fig.30 As shown in (b), a film laminate sample was obtained using a loop / hook 1 having a base material size of 12.5×150 mm. The loop member 6 and the hook member 9 were attached to the approximate center of the first and second films in the width direction.

[0141] (Example 5) Example 5 A film laminate sample was obtained as described above using loop / hook 2 with a substrate size of 25×150 mm.

[0142] (Example 8) In Example 8, a film laminate sample was obtained using a loop / hook 2 having a base material size of 12.5×150 mm. The loop member 6 and the hook member 9 were attached to substantially the center of the first and second films in the width direction.

[0143] (Comparative Example 1) Comparative Example 1 As described above, the first film 31 and the second film 32 were laminated by bonding their entire surfaces with the adhesive film 30 of the same size to obtain a film laminate sample.

[0144] (Comparative Example 2) Comparative Example 1: A film laminate sample was obtained by laminating the first film 31 and the second film 32 with an adhesive film having a width of 12.5 mm, which is half the width of the first and second films. The adhesive film was attached to the approximate center of the first and second films 31 and 32 in the width direction.

[0145] [Table 2]

[0146] As shown in Table 2, regardless of the lamination method, the peel strength decreased by about 40 to 60% by halving the width. That is, it can be seen that the peel strength can be controlled by adjusting the width of the lamination method, and the optimal peel strength can be set according to the application.

[0147] [Third embodiment] In the third embodiment, a film laminate sample with different lamination methods and fixed positions of the lamination methods of the film parts is prepared, and the sample is exposed to a sterilizing gas to verify the sterilization effect. Ethylene oxide gas (EOG) is used as the sterilizing gas. A rectangular film of 100×120 mm is used as the film part. A sealing paper (sterilization label EO-L manufactured by NOF Giken Kogyo Co., Ltd.) is attached to the center of the film part, and if it reacts with EOG, the characters "sterilized" emerge.

[0148] 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

[0149] 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 × (sterilization effect was not achieved).

[0150] (Example 9) In Example 9, a first film 31 made of PET having a thickness of 188 μm and a second film 32 made of PET having a thickness of 188 μm were laminated by means of a ring member 6 and a hook member 9 having a mushroom-shaped hook 5 (ring / hook 1) to obtain a film laminate sample. Fig.31 As shown, in Example 9, the loop / hook 1 is provided at both ends of the first and second films in the longitudinal direction.

[0151] (Example 10) like Fig.32 As shown, Example 10 is the same as Example 9 except that the loop / hook 1 is provided so as to surround the side edge portions of the first and second films all around.

[0152] (Example 11) Example 11 is the same as Example 9 except that loop / hook 2 is used as a stacking method.

[0153] (Comparative Example 3) Comparative Example 3 is the same as Example 10 except that the adhesive film 30 is used as the lamination method.

[0154] [Table 3]

[0155] As shown in Table 3, in Example 10 in which the ring / hook 1 was provided so as to surround all four sides of the long sides of the first and second films, the word "sterilized" also appeared on the seal paper provided in the center, confirming the sterilization effect ( Fig.33 ). Thus, it can be seen that the loop / hook 1 has air permeability, the gap portion in the center of the membrane member can be sterilized, and the loop / hook 1 itself can also be sterilized. On the other hand, in Comparative Example 3 in which the adhesive is provided so as to surround all four sides in the long direction of the first and second films, the word "sterilized" does not appear on the seal paper provided in the center, confirming that sterilization is not possible ( Fig.34 ). Therefore, when the first film and the second film are peeled off, the unsterilized portion is exposed.

[0156] In Example 9 in which the loop / hook 1 was provided at both ends of the first and second films in the longitudinal direction, and Example 11 in which the loop / hook 2 was provided, the sterilization effect was confirmed. Explanation of symbols

[0157] 1 film stack, 2 film component, 4 substrate, 5 ring, 6 ring component, 7 substrate, 8 hook, 9 hook component, 10 fixing material, 11 base, 12 structure, 13 base layer, 20 tongue, 21 protective device, 23 adhesive layer, 25 film stack, 26 concave component, 27 convex component, 30 adhesive, 31 first film, 32 second film, 34 hook component, 35 adhesive, 36 transfer material, 37 energy ray source, 41 roller master, 42 structure.

Claims

1. A film laminate comprising: A plurality of film-like members that are stacked so as to be releasable; and a first engaging member fixedly connected to one of the pair of film-like members and a second engaging member fixedly connected to the other of the pair of film-like members, The first engaging member and the second engaging member are engaged and disengaged so that the pair of film-like members are stacked with a gap therebetween. The engaging portion between the first engaging member and the second engaging member has air permeability.

2. The film laminate according to claim 1, wherein: The first engaging member is a ring member having a plurality of rings vertically arranged on one side of the base material. The second engaging member is a hook member having a plurality of hooks disposed upright on one side of the base material and detachably engaging with the ring. The film-like members are stacked with gaps therebetween due to the engagement of the loop members and the hook members.

3. The film laminate according to claim 2, wherein: The peeling force of the loop member and the hook member which cause the film-like members on the upper layer to be stacked on each other is lower than the peeling force of the loop member and the hook member which cause the film-like members on the lower layer to be stacked on each other.

4. The film laminate according to any one of claims 1 to 3, wherein The engaging force between the first engaging member and the second engaging member is lower than the fixing force between the first engaging member and the film-like member, and lower than the fixing force between the second engaging member and the film-like member.

5. The film laminate according to claim 1, wherein The first engaging member is a concave member, The second engaging member is a convex member that is detachably engaged with the concave member. The film-like members are stacked with gaps therebetween by fitting the concave member and the convex member.

6. The film laminate according to claim 5, wherein: The peeling force of the concave member and the convex member which laminate the film-like members of the upper layer is relatively lower than the peeling force of the concave member and the convex member which laminate the film-like members of the lower layer.

7. The film laminate according to any one of claims 1 to 3, 5 and 6, wherein: The first engaging member and the second engaging member are respectively provided on outer edge portions of the film-like member.

8. The film laminate according to any one of claims 1 to 3, 5 and 6, wherein: The first engaging member and the second engaging member are respectively provided so as to surround the outer edge portion of the film-like member.

9. The film laminate according to any one of claims 1 to 3, 5 and 6, wherein: The surfaces of the film-like member, the first engaging member, and the second engaging member that are exposed to the outside are sterilized.

10. The film laminate according to any one of claims 1 to 3, 5 and 6, wherein: The film-like member has 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.

11. A method for producing a film laminate, comprising: A step of forming a film-like member; a step of forming a first engaging member and a second engaging member that are engaged and disengaged from each other; a step of fixing the first engaging member to a position of one of the pair of film-like members that faces the other film-like member and fixing the second engaging member to a position of the other of the pair of film-like members that faces the one film-like member; and A step of locking the first engaging member and the second engaging member and stacking the pair of film-like members with a gap therebetween.

12. The method for producing a film laminate according to claim 11, wherein: The method comprises the step of sterilizing the plurality of film-like members in a stacked state.

13. A protective device comprising a film laminate mounted on a portion corresponding to the face or the periphery of the eyes of a user, The film stack is the film stack according to any one of claims 1 to 3, 5, and 6.

14. The protection device according to claim 13, wherein: The protective equipment is any one of protective clothing, mask, eye mask and helmet.

15. A method for manufacturing a protective device, wherein a film laminate is mounted on a portion corresponding to the face or the periphery of the eyes of a user, the method comprising: a step of forming a film stack; and The step of assembling the film stack to the protective device, The film stack is the film stack according to any one of claims 1 to 3, 5, and 6.

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