Disaster prevention window and disaster prevention film

Abstract

To provide a novel disaster prevention window.SOLUTION: The present invention relates to a disaster prevention window used in a structure in which a resin security film having glass penetration prevention performance as defined in JIS A5759: 2008 is affixed to at least a portion on at least one surface of the netted plate glass in which the metal mesh is inserted into the glass. Further, the present invention relates to a disaster prevention window used in a structure in which a resin security film having glass penetration prevention performance as defined in JIS A5759: 2008 is affixed to at least a portion on at least one surface of the netted plate glass in which the metal mesh is inserted into the glass, as well as, a resin sheet for auxiliary construction covering at least a portion of the window frame of the disaster prevention window and at least a part of the surface to which the mesh glass security film is not affixed and / or at least a part of the surface to which the mesh glass security film is affixed.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a disaster prevention window used in a structure (e.g., a building or a vehicle) and a disaster prevention film attached to glass to be used to form a disaster prevention window. In particular, the present invention relates to a disaster prevention window that is reinforced to such an extent that the glass will not be penetrated or a hole will not be formed even when it is hit by a flying object caused by a strong wind, and a disaster prevention film used to form such a disaster prevention window. [Background technology]

[0002] Window films have been developed, such as shatterproof films that prevent window glass from breaking due to flying debris such as pebbles caused by strong winds, and security films that are attached to window glass to prevent it from breaking even when external forces are applied (see, for example, Patent Documents 1 to 3).

[0003] However, these conventional shatterproof and crime prevention films do not have the performance to withstand the impact of flying pieces of wood or metal objects hitting window glass during disasters such as typhoons. In other words, conventional shatterproof and crime prevention films are not able to prevent flying objects from penetrating the glass and causing damage inside buildings or cars when they hit window glass with such a large impact. In addition, for example, if a typhoon causes flying debris to collide with a building and create a hole in the exterior, strong winds of an average speed of 40 to 48 meters per second will enter the building, causing a sudden change in indoor air pressure, which can cause serious damage to the building, such as blowing off the roof or deforming shutter curtains, and can even increase the risk of the house collapsing. Therefore, it is necessary to prevent holes from being created in window glass due to flying debris during disasters such as typhoons. In particular, because windows are made of glass, which is the weakest material for building exteriors, there is a high risk of holes being created in windows due to flying debris during typhoon disasters.

[0004] The difference in required penetration performance between general security films and disaster prevention films is that the latter must be able to withstand a greater amount of impact energy from an impacting body and must not penetrate even when the corner of the window glass is struck. In other words, disaster prevention films must have a much higher impact resistance than security films. In particular, when a film is applied to a window glass in a so-called "partially applied" manner (described below), there is the inconvenience that if the film is struck by a piece of wood or metal object during a disaster such as a typhoon, the glass may crack, especially at the corners (approximately 2 mm wide) where the glass is exposed near the window frame where the film is not applied, and the glass may peel off and become penetrated (i.e. the opening may become significantly larger).

[0005] Therefore, there is a strong demand for the development of a disaster prevention window or a disaster prevention film constituting a disaster prevention window that can eliminate the above-mentioned inconveniences and maintain indoor airtightness without creating fatal openings (holes) even when subjected to a strong impact from flying objects during a disaster such as a typhoon. A disaster prevention window or a disaster prevention film constituting a disaster prevention window that satisfies such properties has not yet been developed or is commercially available. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2002-180019 A [Patent Document 2] JP 2004-155092 A [Patent Document 3] JP 2018-65320 A Summary of the Invention [Problem to be solved by the invention]

[0007] A first object of the present invention is to provide a novel disaster prevention window or a novel disaster prevention film used to construct a disaster prevention window, which is not available in the prior art. A further object of the present invention is to provide a disaster prevention window that has the ability to maintain indoor airtightness without causing fatal openings (holes) even when subjected to a strong impact from flying debris during a disaster such as a typhoon, or to provide a disaster prevention film to be used for constructing such a disaster prevention window. Another problem that is desired to be solved by the present invention is to provide a disaster prevention window that preferably meets the JIS R3109 (2018) standard or, even if it does not meet the standard, has good performance that is slightly below the standard, or a disaster prevention film used to construct such a disaster prevention window. [Means for solving the problem]

[0008] The various aspects of the present invention for solving the above problems are as follows. · First aspect [1]. A disaster prevention window used in a structure, A plastic crime prevention film with glass penetration prevention performance as specified in JIS A5759:2008 is affixed to at least a portion of at least one surface of a wire-reinforced glass sheet in which a metal mesh is inserted inside the glass. Emergency window. [2]. A disaster prevention window as described in item [1] above, in which the security film has a margin of a fixed width of 2 mm in the vertical direction from the window frame provided at the edge of the wire-reinforced glass plate, or has no margin and is attached to the entire surface. [3]. (Desired characteristics of the first aspect) When a security film is subjected to multiple vertical collisions with an impacting object having a kinetic energy of 120 J at a randomly selected position on the security film, it will not penetrate or create a hole through which a 76 mm diameter ball can pass, and when the security film is exposed to strong vertical wind pressure with an average wind speed of 41 m / s to 48 m / s for 10 minutes continuously following multiple vertical collisions with the impacting object, it will not create a hole through which a 76 mm diameter ball can pass. A disaster prevention window as described in item [1] or [2] above. · Second Aspect [4]. A disaster prevention film that is attached to glass to form a disaster prevention window, This disaster prevention film is designed to absorb the impact of an attacking object. An intermediate layer formed from at least one selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin, acrylic resin, and adhesive; and The intermediate layer includes resin films disposed on both sides thereof. Disaster prevention film. [4-2] A disaster prevention film that is attached to glass to form a disaster prevention window, This disaster prevention film is designed to absorb the impact of an attacking object. A layer formed from at least one resin selected from the group consisting of a silicone resin, a urethane resin, an ethylene-vinyl acetate copolymer resin, a butyral resin, a soft polyvinyl chloride resin, and an acrylic resin; and A resin film is provided on at least one surface of the layer. Disaster prevention film. [5]. The intermediate layer is formed from an adhesive, A resin film is disposed on both sides of each of the multiple intermediate layers. Disaster prevention film as described in item [4] above. · Third aspect [6]. A disaster prevention film that is attached to glass, the film is a laminate of a plurality of resin films, This laminated body is designed to disperse the impact of an attacking object. (i) A laminated film of a plurality of uniaxially oriented films formed from a thermoplastic resin, in which the orientation directions of adjacent uniaxially oriented films cross each other, or (ii) At least one layer is a laminate having at least one surface on which a plurality of grooves or irregularities are formed; Disaster prevention film. [7]. A disaster prevention film that is attached to glass, This disaster prevention film is made of polycarbonate resin, which disperses the impact of an attacking object. Disaster prevention film. [8]. A disaster prevention film that is attached to glass, This disaster prevention film is designed to prevent the transmission of impact from an impacting object to the glass. An intermediate layer formed of at least one selected from the group consisting of a wire mesh, a resin mesh, a twisted mesh, or a metal, resin or twisted filament; and The intermediate layer includes resin films disposed on both sides thereof. Disaster prevention film. [9]. A disaster prevention film that is attached to glass, This disaster prevention film is a laminate of multiple layers formed from filaments of spider silk or bagworm silk, thereby suppressing the transmission of impact from an impacting object to the glass. Disaster prevention film. [9-2]. A disaster prevention film that is attached to glass, This disaster prevention film is designed to prevent the transmission of impact from an impacting object to the glass. A layer formed from at least one selected from the group consisting of a wire mesh, a resin mesh, a twisted mesh, or a metal, resin or twisted filament; and A resin film is provided on at least one surface of the layer. Disaster prevention film.

[10] . (Desired characteristics for the second and third aspects) When the disaster prevention film is attached to at least a portion of at least one surface of a 5 mm thick float glass, the film will not penetrate or create a hole through which a 76 mm diameter ball can pass when it is hit multiple times in the vertical direction by an impacting object with a kinetic energy of 120 J at a selected position where the disaster prevention film is attached, and when it is continuously exposed to a strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less for 10 minutes following multiple vertical collisions by the impacting object, it will not create a hole through which a 76 mm diameter ball can pass. The disaster prevention film according to any one of the above items [4] to [9-2]. · Implementation of auxiliary installation sheet

[11] . A disaster prevention window according to any one of the above [1] to [3], and A resin sheet for auxiliary installation is provided for covering at least a portion of the window frame of the disaster prevention window, at least a portion of the surface of the wire-reinforced glass sheet on which the crime prevention film is not attached, and / or at least a portion of the surface of the wire-reinforced glass sheet on which the crime prevention film is attached. Including disaster prevention windows.

[12] . A disaster prevention window as described in item

[11] above, in which the security film is attached with a constant margin of 2 mm in the vertical direction from the window frame provided at the edge of the wire-reinforced glass plate, and a resin sheet for auxiliary installation covers the entire margin.

[13] . A disaster prevention window having the disaster prevention film according to any one of the above items [4] to

[10] attached to at least a portion of at least one surface of a window glass, and A resin sheet for auxiliary construction that covers at least a portion of the window frame of this disaster prevention window, at least a portion of the surface of the window glass to which the disaster prevention film is not attached, and / or at least a portion of the surface of the window glass to which the disaster prevention film is attached. Including disaster prevention windows.

[14] . A disaster prevention window as described in item

[13] above, in which the disaster prevention film is attached with a margin of a fixed width of 2 mm in the vertical direction from the window frame provided at the edge of the window glass, and the resin sheet for auxiliary installation covers the entire margin. Effect of the Invention

[0009] According to a preferred embodiment of the disaster prevention window of the present invention, even if there is a strong impact from flying objects during a disaster such as a typhoon, no fatal openings (holes) will be created and the indoor airtightness can be maintained. Furthermore, according to a preferred embodiment of the disaster prevention film of the present invention, by attaching this film to window glass, even if there is a strong impact from flying debris during a disaster such as a typhoon, fatal openings (holes) will not be created and the airtightness of the interior can be maintained. Furthermore, according to a preferred embodiment of the disaster prevention window or window glass to which a disaster prevention film is attached according to the present invention, it is preferable that the window meets the JIS R3109 (2018) standard, or, even if it does not meet the standard, it can obtain good performance that is slightly below the standard. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic cross-sectional view showing an example of a disaster prevention window according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view showing an example of a disaster prevention window according to the second embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic cross-sectional view showing an example of a disaster prevention window according to the third embodiment of the present invention. [Figure 4] Fig. 4(a) is a schematic cross-sectional view showing an example of pre-application of a crime prevention film or disaster prevention film according to one embodiment of the present invention. Fig. 4(b) is a schematic cross-sectional view showing an example of post-application of a crime prevention film or disaster prevention film according to one embodiment of the present invention. Fig. 4(c) is a schematic cross-sectional view showing an example of a structure in which an auxiliary application sheet is attached to the post-application of a crime prevention film or disaster prevention film according to one embodiment of the present invention. [Diagram 5] Fig. 5(a) is a plan view showing an example of a structure in which an auxiliary application sheet is attached to the post-application of a crime prevention film or disaster prevention film according to one embodiment of the present invention, and Fig. 5(b) is a perspective view thereof. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Various aspects of the present invention will now be described in detail with reference to the drawings. However, it should be noted that the present invention is not limited to the specific embodiments below, but rather the scope thereof is defined by the appended claims.

[0012] 1. First aspect of the present invention (combination of wire-reinforced glass sheet and crime prevention film) The first aspect of the present invention is a disaster prevention window for use in a structure, which comprises a wire-reinforced glass plate having a metal mesh inserted inside the glass, and a resinous crime prevention film that has the glass penetration prevention performance defined in JIS A5759:2008 affixed to at least a portion of at least one surface of the wire-reinforced glass plate. The inventors examined the results of past physical property tests on glass and film, and discovered that by combining the property of wire-reinforced glass that "even if an impacting object hits the glass, cracks will not spread throughout the glass", with the performance of security film that "is durable against an impacting object with kinetic energy of approximately 120 J and makes the glass less likely to break", it is surprisingly possible to obtain a strong disaster prevention window that will not create fatal openings (holes) even if there is a strong impact from a flying object during a disaster such as a typhoon, (i.e., even if an opening does occur, the opening will not expand significantly) and that can maintain airtightness indoors. A schematic cross-sectional view of an example of a disaster prevention window according to this embodiment is shown in Fig. 1. In the figure, 1 is a disaster prevention window, 2 is a wire-reinforced glass plate with a metal mesh (2a) inserted inside the glass, and 3 is a plastic crime prevention film. (In the figure, an adhesive (layer) may be disposed between the wire-reinforced glass plate 2 and the crime prevention film 3, but this is not shown.)

[0013] The wired plate glass 2 here has a metal mesh 2a inserted inside the glass, and refers to any of the "wired plate glass," "polished wired plate glass," "wire-type plate glass" (with a textured surface), "square wired plate glass," and "diamond wired plate glass" as defined in Sections 3.1 and 3.3 to 3.6 of JIS R3204:2014 "Wired plate glass and lined plate glass." For example, Section 3.1 of JIS R3204:2014 states, "Plate glass in which a metal mesh, as specified in JIS G0203, with a wire diameter of 0.4 mm or more is inserted inside the glass. The metal mesh may be plated to improve quality. Its main function is fire resistance and it meets the fire resistance requirements of Clause 8." The thickness of the wired glass plate is not particularly limited, but there are two common types: 6.8 mm and 10 mm. Of these, the wired glass plate having a thickness of 6.8 mm is more typically used. The metal mesh used in the wired glass may usually be made of stainless steel, and may be subjected to known surface modification such as zinc plating or other rust prevention treatment.

[0014] The glass material constituting the wire-reinforced glass sheet is not particularly limited as long as it satisfies the above-mentioned standards, but silicate glass is usually used. In addition, materials called green glass, inorganic glass sheet, and uncolored transparent glass sheet can also be used. The glass plate may be a single layer or a multi-layer glass plate, so long as it has a desired thickness. Furthermore, in addition to the metal mesh inserted inside the glass, the wire-reinforced glass sheet may also have a transparent conductive metal layer provided on its surface.

[0015] The crime prevention film 3 is made of resin and has glass penetration prevention properties as specified in item 5-11 of JIS A5759:2008. JIS A5759:2008, item 5-11 states: "Glass penetration prevention film must meet one of the following requirements. a) Performance based on steel ball drop test A The glass penetration prevention performance shall be such that, when tested in accordance with 6.11, the steel ball is dropped from a height of 3000 mm ± 50 mm without penetrating the glass. b) Performance based on steel ball drop test B The glass penetration prevention performance shall be the drop height at which the steel ball does not penetrate the glass when tested according to 6.11, being 1500mm ± 50mm. It is explained that:

[0016] There are no particular limitations on the method for attaching the crime prevention film to the wire-reinforced glass sheet that constitutes the windowpane, so long as the film is attached to at least a portion of at least one surface of the glass. The security film may be attached to only one side of the wire-reinforced glass sheet or to both sides. From the viewpoints of workability, design and economy, it is preferable to attach it to one side, and from the viewpoint of further improving safety, it is preferable to attach it to both sides. Generally, the position of the security film attached to the wire-reinforced glass sheet that constitutes the window glass may be either to all exposed glass areas or to a so-called partial attachment (technical term in the industry), which is attachment with a certain margin of 2 mm in the vertical direction from the window frame provided at the edge of the wire-reinforced glass sheet. Note that the window frame here is the frame of the window glass and may be any known one (the same applies hereinafter in this specification).

[0017] The thickness of the crime prevention film (single layer or multiple layers) is preferably as thick as possible from the standpoint of safety, penetration resistance, etc., and is, for example, usually 30 μm or more, typically 50 μm or more, and preferably 100 μm or more. On the other hand, the thickness of the security film may be, for example, usually 2500 μm or less, typically 2000 μm or less, and preferably 1500 μm or less, from the standpoint of ease of installation and taking into consideration manufacturability when forming the security film by laminating multiple films with thicknesses of several tens of μm or more.

[0018] The type of resin constituting the crime prevention film is not particularly limited as long as it has the glass penetration prevention performance specified in item 5-11 of JIS A5759:2008. It is desirable for the resin constituting the crime prevention film to have properties such as flexibility, softness, elasticity, and high strength. Examples of such resins include, but are not limited to, synthetic resins whose main component is a polyester resin such as polyethylene terephthalate (PET), and synthetic resins whose main component is a resin such as ethylene-vinyl acetate copolymer (EVA), polyethylene, polyurethane, polyvinyl butyral (PVB), or polycarbonate. The crime prevention film may be a laminate of a plurality of layers of these resin films, or may be a laminate of a plurality of resin films having different thicknesses. Furthermore, the security film may have additional layers other than the resin film mentioned here, so long as the objects of the present invention are not impaired.

[0019] A hard coat formed of, for example, a UV (ultraviolet) curable resin may be provided on the surface of the security film (the surface opposite to the surface applied to the window glass) in order to increase scratch resistance from the viewpoint of design. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0020] The security film is usually attached to the wire-reinforced glass plate using an adhesive (pressure-sensitive adhesive) or a bonding agent. In the case of so-called full-surface attachment of the security film, instead of attachment using an adhesive, the security film and the wire-reinforced glass may be integrally molded and manufactured when the security film is formed. In either partial attachment or full-surface attachment, attachment using an adhesive is more preferable from the viewpoint of ease of construction, maintenance, and disposal workability. In addition, since the film is attached to the wire-reinforced glass plate that constitutes the window glass, it is more preferable to use a transparent adhesive. The transparency referred to here usually means that the visible light transmittance of the adhesive is 80% or more, preferably 85% or more, and more preferably 90% or more.

[0021] The transparent adhesive for forming the crime prevention film is not particularly limited, but an acrylic adhesive is preferred. A silicone adhesive is also preferred. The acrylic adhesive is an adhesive composition containing an acrylic polymer and an optional component that is used as desired. Examples of the acrylic polymer include (meth)acrylic acid ester monomers such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate, and stearyl (meth)acrylate; acrylic acid, methacrylic acid, itaconic acid, and β-carboxyethyl (meth)acrylate; Examples of the monomers include polymers or copolymers having one or more of the following monomers: a carboxyl group-containing monomer such as meth)acrylate; an epoxy group-containing monomer such as glycidyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate glycidyl ether; and a hydroxyl group-containing (meth)acrylic acid ester monomer such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate. Note that (meth)acrylic acid means acrylic acid or methacrylic acid. (Meth)acrylate means acrylate or methacrylate. As the acrylic polymer, one or more of these monomers may be used as a mixture. Examples of the optional components include silane coupling agents, compounds having two or more epoxy groups in one molecule, compounds having two or more isocyanate groups in one molecule, photopolymerization initiators, reaction catalysts, organic polyvalent metal compounds, antistatic agents, surfactants, leveling agents, thixotropy imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the acrylic polymer.

[0022] The silicone adhesive can be either an addition reaction type silicone adhesive or a peroxide curing type silicone adhesive. The addition reaction type silicone adhesive is an adhesive composition that includes a silicone polymer containing an organic group capable of addition reaction such as a vinyl group; an addition reaction catalyst such as a platinum compound such as chloroplatinic acid, a rhodium complex, and a ruthenium complex; and an optional component that is used as required. The peroxide curing type silicone adhesive is an adhesive composition that includes a silicone polymer, an organic peroxide such as benzoyl peroxide, and an optional component that is used as required. Examples of optional components used in these pressure-sensitive adhesive compositions include antistatic agents, surfactants, leveling agents, thixotropy-imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the silicone polymer.

[0023] The adhesive can be applied to one or both of the bonding surfaces of the security film and the wire-reinforced glass by a known method. In general, an adhesive layer is formed on one surface of the security film in advance, and a release paper is applied thereon. The method for applying the pressure-sensitive adhesive is not particularly limited, but examples thereof include spraying, flow coating, roll coating, brush coating, dip coating, spin coating, screen printing, casting, gravure printing, and flexographic printing.

[0024] The fire prevention window according to the first aspect of the present invention preferably has a kinetic energy of about 1.6 J (corresponding to a steel ball of 8 mm in diameter and 2 g±0.1 g having an impact speed of 39.7 m / s, corresponding to "A" in JIS R3109) to a selected position where the crime prevention film is attached, preferably a kinetic energy of about 120 J (corresponding to a steel ball of 1 kg±0.1 kg having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and having an impact speed of 15.3 m / s, corresponding to "B" in JIS R3109), more preferably a kinetic energy of about 150 J (corresponding to a steel ball of 2.05 kg±0.1 kg having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and having an impact speed of 12.2 m / s, corresponding to "B" in JIS R3109). more preferably, the kinetic energy is about 350 J (equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 24.4 ... The material must not be penetrated or produce a hole through which a ball with a diameter of 76 mm can pass when struck vertically once or multiple times (preferably once when a wooden impactor is used, or a total of 30 times when a steel ball impactor is used) by an impactor of a type equivalent to "E" in R3109, and must not produce a hole through which a ball with a diameter of 76 mm can pass when continuously exposed to strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less for 10 minutes following single or multiple vertical collisions by the impactor. This test method is in accordance with JIS R3109:2018 "Test method for collision of flying objects during storms on architectural glass". The collision position of the impacting object (defined for each type of glass) is explained in the above standard. Those skilled in the art can understand that passing the above test at a specific collision position defined therein means that it can be estimated with a high probability that the above test will also be passed at any collision position. The disaster prevention window according to the first aspect of the present invention preferably meets protection level 2 (the protection level required for residential buildings, commercial and industrial buildings, etc.) specified in Table 3 of JIS R3109:2018, and more preferably meets protection level 3 (the protection level required for buildings and structures where many people gather in one place, such as large office buildings, schools, shopping centers, and hotels).

[0025] As an alternative method for the above impact body collision method for evaluating disaster prevention performance (test based on JIS R3108), a kinetic energy of about 120 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 3000 ± 50 mm), more preferably a kinetic energy of about 240 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 6000 ± 50 mm), and even more preferably a kinetic energy of about 360 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 6000 ± 50 mm). Preferably, an impacting object with a kinetic energy of about 480 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg being dropped from a height of 9000 ± 50 mm) is used, and most preferably, the impacting object is dropped (collided) once on each vertex of an equilateral triangle with sides of 130 ± 20 mm at the center of the location where the security film is affixed on the disaster prevention window, three times in total. As a further alternative, a ball drop test can be conducted based on JIS R3108, except that the ball is dropped once from a height of 9m into a circle with a radius of 5cm from the center of the test glass plate. In this case, the following evaluation can be performed based on JIS R3109. A: After the test, the glass does not have a hole (opening) large enough for a 76 mm diameter sphere to pass through, and does not have any cracks longer than 125 mm. B: After the test, the glass has a hole (opening) large enough to pass a 76 mm diameter sphere through, or a crack longer than 125 mm. The impact in this impact test (ball drop height 9m) has an energy amount equivalent to "JD" in JIS R3109 (kinetic energy 350J). As a further alternative, impact with an impacting body having a predetermined kinetic energy may be used.

[0026] 2. Second aspect of the present invention (use of cushioning material in intermediate layer) A second aspect of the present invention is a disaster prevention film that is attached to glass to form a disaster prevention window, the disaster prevention film comprising an intermediate layer (shock absorbing layer) formed from at least one selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin (so-called polyvinyl chloride resin (PVC resin)), acrylic resin and adhesive, so as to absorb the impact from an impacting body, and resin films disposed on both sides of the intermediate layer. This can also be modified as follows: A disaster prevention film used to form a disaster prevention window by being attached to glass, the disaster prevention film comprising a layer (shock absorbing layer) formed from at least one selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin and acrylic resin so as to absorb the impact of an impacting body, and a resin film arranged on one side of the layer. (Note that, hereinafter, for the sake of simplicity, the above-mentioned embodiment including the "intermediate layer" will be mainly described, but as described below, the individual explanations of the embodiment including the "intermediate layer" may be applied to this modified embodiment as well, even if not specifically mentioned.) The inventors have discovered that by constructing a disaster prevention film from an intermediate layer formed from a material having cushioning properties selected from a predetermined group of components and a resin film arranged on both sides of the intermediate layer (one side in the above modified form), and attaching this to a window glass, it is surprisingly possible to find that even if there is a strong impact from flying debris during a disaster such as a typhoon, the above-mentioned configuration is able to absorb the impact, no fatal openings (holes) are created, and the airtightness of the interior can be maintained. A schematic cross-sectional view of an example of a structure combining a disaster prevention film and float glass according to this embodiment is shown in Fig. 2. In the figure, 4 indicates the disaster prevention film, 5 indicates the intermediate layer, 6 indicates the resin film, and 7 indicates the float glass (the object to which the disaster prevention film is attached). (In the figure, an adhesive (layer) similar to that of the first embodiment may be disposed between each layer, but is not shown.)

[0027] In this embodiment, the intermediate layer (shock absorbing layer) 5 is formed from at least one selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin, acrylic resin, and adhesive. By forming the intermediate layer from these resins, cushioning properties are imparted to the disaster prevention film 4, making it possible to absorb the impact of an impacting body. Among these resins, preferred examples include silicone resin, urethane resin, butyral resin, and soft polyvinyl chloride resin (vinyl chloride resin). That is, preferred examples of the intermediate layer (shock absorbing layer) include, but are not limited to, a silicone resin layer, a urethane resin layer, a soft polyvinyl chloride resin layer (vinyl chloride resin layer), and a butyral resin layer. Regardless of the compound from which the intermediate layer is formed, the intermediate layer may be a single layer or multiple layers. When the intermediate layer 5 is multiple layers, the intermediate layers and the resin film 6 may be arranged alternately.

[0028] The silicone resin used in the intermediate layer of this embodiment is a silicone gel having cushioning properties. The silicone gel is not particularly limited and may be produced by any known method. For example, silicone gel can be produced by the methods described in JP-A-2003-261776, JP-A-2005-161780, JP-A-2008-291232, and the like. The silicone resin here includes a group of compounds called silicone rubber. The silicone resin may be porous. A typical example of an intermediate layer (shock absorbing layer) formed from a silicone resin is the silicone sheet "Alpha GEL" (αGEL) manufactured by Taica Corporation.

[0029] Urethane resin has cushioning properties and elasticity (elongation), and is therefore preferably used to form the intermediate layer of this embodiment. The urethane resin used in the intermediate layer of this embodiment is not particularly limited as long as it has cushioning properties and elasticity (elongation), but may be polyurethane foam or thermoplastic polyurethane. Such urethane resin may be produced by any known method. Polyurethane foams can typically be produced by reacting an organic polyisocyanate with a polymeric polyol in the presence of a catalyst, a blowing agent, a foam stabilizer, and optionally a crosslinking agent and other optional additives. The thermoplastic polyurethane is preferably transparent. Such a thermoplastic polyurethane resin having transparency is not particularly limited, but representative examples include the "PANDEX" series, "Desmopan" series, and "Texin" series commercially available from DIC Covestro Polymer Co., Ltd., and "Esmer URS" and "Esmer MLS" commercially available from Nihon Matai Co., Ltd. Another example of the polyurethane film is the polyurethane film "Tough Grace Film TG88-I" (product name) manufactured by Takeda Sangyo Co., Ltd.

[0030] The polyol for forming the polyurethane foam is not particularly limited, and examples thereof include polyether polyols, polymer polyols, and polyester polyols having two or more reactive hydroxyl groups. Examples of the polyether polyols include polyhydric alcohols such as glycol, glycerin, pentaerythritol, and sucrose, ammonia, aliphatic amine compounds such as ethyleneamine, aromatic amine compounds such as toluenediamine and diphenylmethane-4,4'-diamine, and / or polyether polyols obtained by adding ethylene oxide or propylene oxide to the mixtures thereof. Examples of the polymer polyols include those obtained by reacting the polyether polyols with ethylenically unsaturated monomers such as butadiene, acrylonitrile, and styrene in the presence of a radical polymerization catalyst. Examples of the polyester polyols include those produced from dibasic acids and polyhydric alcohols, such as polyethylene adipate and polyethylene terephthalate. The polyisocyanate for forming the polyurethane foam may be any known organic polyisocyanate, and examples thereof include aromatic polyisocyanates such as toluene diisocyanate, diphenylmethane-4,4'-diisocyanate, and polymerized isocyanates thereof; aliphatic polyisocyanates such as hexamethylene diisocyanate; alicyclic polyisocyanates such as isophorone diisocyanate; or isocyanate-terminated prepolymers such as toluene diisocyanate prepolymer and diphenylmethane-4,4'-diisocyanate prepolymer obtained by reacting these with polyols; modified isocyanates such as carbodiimide-modified isocyanates; and mixed polyisocyanates thereof. The blowing agent for forming the polyurethane foam includes a halogenated hydrocarbon having a low boiling point and / or water. As the halogenated hydrocarbon, known halogenated methanes and halogenated ethanes can be used. Examples of foam stabilizers for forming polyurethane foam include non-ionic surfactants such as organopolysiloxane-polyoxyalkylene copolymers and silicone-glycol copolymers, and mixtures of these. Catalysts for forming polyurethane foam include amine catalysts such as triethylamine, N-ethylmorpholine, triethylenediamine, tetramethylhexamethylenediamine, etc. Other catalysts include amine catalysts having a reactive primary amino group or secondary amino group in the molecule, amine catalysts having a reactive primary hydroxyl group in the molecule, and the combined use of an amine catalyst having a secondary hydroxyl group in the molecule with triethylenediamine.

[0031] The ethylene-vinyl acetate copolymer resin (EVA resin) used in the intermediate layer of this embodiment is not particularly limited as long as it has cushioning properties, and any known resin can be used. For example, ethylene-vinyl acetate copolymer resins can be produced by the methods described in JP-A-62-32129, JP-T-2003-504439, JP-A-2012-71502, and the like.

[0032] The butyral resin used in the intermediate layer of this embodiment is polyvinyl butyral (PVB) having cushioning properties. Polyvinyl butyral is a compound produced by an acetalization reaction (intramolecular cyclization reaction) between polyvinyl alcohol and aldehyde, and any known polyvinyl butyral may be used. The theory of the reaction is explained, for example, in "Highly acetalized polyvinyl butyral: concept and synthesis of highly acetalized polyvinyl butyral" (Maeda Yuko et al.) in Kobunshi Ronbunshu, Vol. 1.50, No. 1, pp. 49-56 (Jan., 1993). A typical example of polyvinyl butyral (PVB) is commercially available under the trade name "Mobital" from Kuraray Co., Ltd. Another example of a polyvinyl butyral (PVB) sheet is "S-LEC Film" (trade name) manufactured by Sekisui Chemical Co., Ltd.

[0033] The soft polyvinyl chloride (polyvinyl chloride: PVC) resin used in the intermediate layer of this embodiment is not limited as long as it has cushioning properties, and any known resin can be used. The vinyl chloride polymer constituting the soft polyvinyl chloride resin is not particularly limited, and examples thereof include vinyl chloride homopolymers, chlorinated vinyl chloride polymers, vinyl chloride copolymers obtained by random copolymerization, graft copolymerization, or block copolymerization of one or more of vinyl chloride monomers and all monomers copolymerizable therewith, etc. One or a mixture of two or more of the above polymers may be used.

[0034] As the monomer copolymerizable with vinyl chloride monomer, any monomer copolymerizable with vinyl chloride monomer may be used, examples of which include ethylene, propylene, butene, pentene-1, butadiene, styrene, α-methylstyrene, acrylonitrile, vinylidene chloride, vinylidene cyanide, alkyl vinyl ethers such as methyl vinyl ether, vinyl carboxylates such as vinyl acetate, aryl ethers such as methoxystyrene, dialkyl maleates such as dimethyl maleate, fumarate esters such as dimethyl fumarate, N-vinylpyrrolidone, vinylpyridine, vinylsilanes, alkyl acrylates such as butyl acrylate, and alkyl methacrylates such as methyl methacrylate. The degree of polymerization of PVC is not particularly limited, but is preferably from 400 to 10,000 inclusive in order to provide excellent processability during molding.

[0035] The vinyl chloride polymer may be mixed with a compound (one or more) having three or more isocyanate groups. Examples of such a compound having three or more isocyanate groups include isocyanurate-modified diisocyanates, triisocyanates such as 1,6,11-undecane triisocyanate, lysine ester triisocyanate, or 4-isocyanatemethyl-1,8-octamethyl diisocyanate, or biuret-modified diisocyanates, allophanate-modified diisocyanates, adducts, or polyfunctional isocyanates such as polyphenylmethane polyisocyanates. Examples of diisocyanates include 2,4- or 2,6-tolylene diisocyanate, m- or p-phenylene diisocyanate, 1-chlorophenylene-2,4-diisocyanate, 1,5-naphthalene diisocyanate, methylenebisphenylene-4,4'-diisocyanate, m- or p-xylene diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, 4,4'-methylenebiscyclohexyl diisocyanate, isophorone diisocyanate, and trimethylhexamethylene diisocyanate.

[0036] Furthermore, the vinyl chloride polymer may be mixed with a polymer polyol (one or more kinds). Examples of such polymer polyols include polyester polyols, polyether polyols, polycaprolactone polyols, polycarbonate polyols, castor oil polyols, ethylene-vinyl acetate copolymers, etc. From the viewpoint of compression set performance and processability of the resulting composition, the molar ratio of isocyanate group / hydroxyl group in the above-mentioned polymer polyol and compound having 3 or more isocyanate groups may be, for example, in the range of 0.2 to 2. In addition, from the viewpoint of compression set performance and processability of the resulting composition, the total amount of the polymer polyol and the compound having 3 or more isocyanate groups may be, for example, 30 parts by weight or more and 900 parts by weight or less per 100 parts by weight of vinyl chloride polymer.

[0037] Additionally, the vinyl chloride polymer may be mixed with a plasticizer(s). Examples of such plasticizers include phthalic acid-based plasticizers such as di-n-butyl phthalate, di-2-ethylhexyl phthalate, di-n-octyl phthalate, diisodecyl phthalate, diisooctyl phthalate, octyldecyl phthalate, butyl benzyl phthalate, and di-2-ethylhexyl isophthalate; aliphatic ester-based plasticizers such as di-2-ethylhexyl adipate, di-n-decyl adipate, diisodecyl adipate, dibutyl sebacate, and di-2-ethylhexyl sebacate; trimellitic acid-based plasticizers such as trioctyl trimellitate and tridecyl trimellitate; phosphate-based plasticizers such as tributyl phosphate, tri-2-ethylhexyl phosphate, 2-ethylhexyl diphenyl phosphate, and tricresyl phosphate; epoxy-based plasticizers such as epoxy soybean oil; and polyester-based polymer plasticizers.

[0038] A general urethanization catalyst can be used as a reaction catalyst for these raw materials. Examples of the urethanization catalyst include amine catalysts such as triethylamine, triethylenediamine, and N-methylmorpholine, and tin catalysts such as tetramethyltin, tetraoctyltin, dimethyldioctyltin, triethyltin chloride, dibutyltin diacetate, and dibutyltin dilaurate.

[0039] In addition to the above components, the soft polyvinyl chloride resin may contain other optional additives such as stabilizers. Examples of stabilizers include metal soap-based stabilizers such as lead stearate, calcium stearate, or cadmium stearate; epoxy-based stabilizers such as epoxidized soybean oil or epoxidized linseed oil; hydrotalcite-based compounds; and other phosphite-based stabilizers. Other optional components include lubricants, colorants, inorganic fillers such as calcium carbonate or talc, and light-resistant stabilizers such as ultraviolet absorbers.

[0040] The soft polyvinyl chloride resin can be obtained, for example, by heating, melting and kneading the above-mentioned components under shear stress.

[0041] The acrylic resin used in the intermediate layer of this embodiment is not particularly limited as long as it has cushioning properties, and may be any known acrylic resin. Examples of the acrylic resin include (meth)acrylic acid ester (co)polymers, copolymers containing structural units derived from (meth)acrylic acid esters, and modified products thereof.

[0042] Examples of the (meth)acrylic acid ester (co)polymer include polymethyl(meth)acrylate, polyethyl(meth)acrylate, polypropyl(meth)acrylate, polybutyl(meth)acrylate, methyl(meth)acrylate-butyl(meth)acrylate copolymer, ethyl(meth)acrylate-butyl(meth)acrylate copolymer, and the like.

[0043] Examples of copolymers containing structural units derived from the above-mentioned (meth)acrylic acid esters include ethylene-methyl (meth)acrylate copolymers, styrene-methyl (meth)acrylate copolymers, vinylcyclohexane-methyl (meth)acrylate copolymers, maleic anhydride-methyl (meth)acrylate copolymers, and N-substituted maleimide-methyl (meth)acrylate copolymers.

[0044] Examples of the modified product include a polymer having a lactone ring structure introduced by an intramolecular cyclization reaction; a polymer having glutaric anhydride introduced by an intramolecular cyclization reaction; and a polymer having an imide structure introduced by reacting with an imidizing agent (e.g., methylamine, cyclohexylamine, ammonia, etc.) (poly(meth)acrylimide-based resin).

[0045] The adhesive used in the intermediate layer of this embodiment may be the same as that described in the first embodiment. That is, the adhesive is not particularly limited, but an adhesive composition containing a transparent adhesive such as the acrylic adhesive or silicone adhesive exemplified above, and optional components used as desired, can be used.

[0046] The acrylic pressure-sensitive adhesive is a pressure-sensitive adhesive composition containing an acrylic polymer and optional components used as desired. Examples of the acrylic polymer include (meth)acrylic acid ester monomers such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate, and stearyl (meth)acrylate; acrylic acid, methacrylic acid, itaconic acid, and β-carboxyethyl (meth)acrylate; Examples of the monomers include polymers or copolymers having one or more of the following monomers: a carboxyl group-containing monomer such as meth)acrylate; an epoxy group-containing monomer such as glycidyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate glycidyl ether; and a hydroxyl group-containing (meth)acrylic acid ester monomer such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate. Note that (meth)acrylic acid means acrylic acid or methacrylic acid. (Meth)acrylate means acrylate or methacrylate. As the acrylic polymer, one or more of these monomers may be used as a mixture. Examples of the optional components include silane coupling agents, compounds having two or more epoxy groups in one molecule, compounds having two or more isocyanate groups in one molecule, photopolymerization initiators, reaction catalysts, organic polyvalent metal compounds, antistatic agents, surfactants, leveling agents, thixotropy imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the acrylic polymer.

[0047] The silicone adhesive can be either an addition reaction type silicone adhesive or a peroxide curing type silicone adhesive. The addition reaction type silicone adhesive is an adhesive composition that includes a silicone polymer containing an organic group capable of addition reaction such as a vinyl group; an addition reaction catalyst such as a platinum compound such as chloroplatinic acid, a rhodium complex, and a ruthenium complex; and an optional component that is used as required. The peroxide curing type silicone adhesive is an adhesive composition that includes a silicone polymer, an organic peroxide such as benzoyl peroxide, and an optional component that is used as required. Examples of optional components used in these pressure-sensitive adhesive compositions include antistatic agents, surfactants, leveling agents, thixotropy-imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the silicone polymer.

[0048] In this embodiment, when the intermediate layer is made of a pressure-sensitive adhesive, a configuration may be adopted in which a plurality of (two or more) intermediate layers are arranged, and a resin film is arranged on both sides of each of the intermediate layers. In this case, it is more preferable to form at least three intermediate layers, and even more preferable to form four or more layers. By having more pressure-sensitive adhesive intermediate layers, it becomes easier to absorb the impact from an impacting body. For example, when a polyethylene terephthalate (PET) resin film is placed on both sides of an intermediate layer formed from an adhesive, the structure becomes PET layer / adhesive layer / PET layer / adhesive layer... (i.e., crack-resistant layer / layer processed to be easily cracked / crack-resistant layer / layer processed to be easily cracked...) This structure makes it possible to more efficiently absorb the impact of an impacting body.

[0049] The thickness of the intermediate layer (the total thickness of the layers in the case of a plurality of layers) is not particularly limited, but may be, for example, 3 μm to 6000 μm, and preferably 5 μm to 4000 μm.

[0050] The resin forming the resin film arranged on both sides of the intermediate layer in this embodiment is not particularly limited, but is preferably a resin capable of forming a film having transparency. As described above, the transparency here usually means that the visible light transmittance of the resin film is 60% or more, preferably 70% or more, more preferably 80% or more, even more preferably 85% or more, and even more preferably 90% or more. Examples of such transparent resin films include films of cellulose ester resins such as triacetyl cellulose, polyester resins such as polyethylene terephthalate, cyclic hydrocarbon resins such as ethylene norbornene copolymers, acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and vinylcyclohexane-methyl (meth)acrylate copolymers, aromatic polycarbonate resins, polyolefin resins such as polypropylene and 4-methyl-pentene-1, polyamide resins, polyarylate resins, polymeric urethane acrylate resins, and polyimide resins. These films include non-stretched films, uniaxially stretched films, and biaxially stretched films. Also, a laminate film in which one or more of these are laminated in two or more layers may be used.

[0051] The thickness of the resin films arranged on both sides of the intermediate layer in this embodiment (the total thickness of the layers in the case of multiple layers) is not particularly limited, but may be, for example, 30 μm to 600 μm, and preferably 40 μm to 400 μm.

[0052] The disaster prevention film of this embodiment may have additional layers in addition to the intermediate layer, resin film, or adhesive used to bond them, as long as the additional layers do not impede the objectives of the present invention.

[0053] Examples of such additional layers include a hard coat formed from a UV (ultraviolet) curable resin from the viewpoint of increasing the scratch resistance of the resin film. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0054] The total thickness of the disaster prevention film of this embodiment (total thickness including single or multiple intermediate layers, resin film, adhesive for bonding them, and any other additional layers) is preferably thicker from the standpoint of safety, penetration resistance, etc., and may be, for example, typically 50 μm or more, preferably 80 μm or more, more preferably 100 μm or more, and even more preferably 120 μm or more. On the other hand, the total thickness of the disaster prevention film of this embodiment may be, for example, 7000 μm or less, typically 3500 μm or less, and preferably 2000 μm or less, from the standpoint of construction workability and taking into consideration manufacturability when laminating multiple intermediate layers with thicknesses of several tens of μm or more.

[0055] In this embodiment of the disaster prevention film, each layer may be formed sequentially from one side (with or without adhesive), or each layer may be formed first and then an adhesive may be applied to one or both sides of the layers to integrate them. The method for applying the raw material composition or adhesive for each layer is not particularly limited, but may include, as described above, spraying, flow coating, roll coating, brush coating, dip coating, spin coating, screen printing, casting, gravure printing, and flexographic printing.

[0056] In addition, in the disaster prevention film of this embodiment, when the intermediate layer is formed from at least one resin selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin and acrylic resin other than an adhesive, one of the resin films arranged on both sides of the intermediate layer may be replaced with an adhesive. The adhesive in this embodiment serves both as a substitute for the resin film that protects and covers the intermediate layer and as a bond to the glass that is combined with this disaster prevention film. Therefore, the types of adhesives that can be used in this case are those described above. The thickness of the layer formed by the pressure-sensitive adhesive in this embodiment may be, for example, 20 μm to 500 μm. The total thickness of the disaster prevention film in this embodiment may be within the above-mentioned range.

[0057] The glass to be combined with the disaster prevention film of this embodiment is not particularly limited, but is mainly expected to be general-purpose float glass plate (no metal mesh inserted inside) that is not wire-reinforced glass plate. The float plate glass here refers to float plate glass defined in JIS R3202:2011 "Float plate glass and polished plate glass". Such float glass sheets are typically made of silicate glass. The thickness of the float glass sheet may usually be any of 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, 12 mm, 13 mm, 15 mm, 19 mm, 22 mm, 25 mm. Typically, the thickness of the float glass sheet may be 5 mm or 6 mm.

[0058] The disaster prevention film according to the second aspect of the present invention, when attached to at least a portion of at least one surface of a float glass having a thickness of 5 mm, preferably has a kinetic energy of about 1.6 J (equivalent to a steel ball having a diameter of 8 mm and weighing 2 g±0.1 g having an impact speed of 39.7 m / s, equivalent to "A" in JIS R3109) to a selected position to which the disaster prevention film is attached, preferably a kinetic energy of about 120 J (equivalent to a steel ball having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and weighing 1 kg±0.1 kg having an impact speed of 15.3 m / s, equivalent to "B" in JIS R3109), more preferably a kinetic energy of about 150 J (equivalent to a steel ball having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and weighing 2.05 kg±0.1 kg having an impact speed of 12.2 m / s, equivalent to "C" in JIS R3109). more preferably, the kinetic energy is about 350 J (equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 24.4 ... The material must not be penetrated or produce a hole through which a ball with a diameter of 76 mm can pass when struck vertically once or multiple times (preferably once when a wooden impactor is used, or a total of 30 times when a steel ball impactor is used) by an impactor of a type equivalent to "E" in R3109, and must not produce a hole through which a ball with a diameter of 76 mm can pass when continuously exposed to strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less for 10 minutes following single or multiple vertical collisions by the impactor. This test method is in accordance with JIS R3109:2018 "Test method for collision of flying objects during storms on architectural glass". The collision position of the impacting object (defined for each type of glass) is explained in the above standard. Those skilled in the art can understand that passing the above test at a specific collision position defined therein means that it can be estimated with a high probability that the above test will also be passed at any collision position. The disaster prevention film according to the second aspect of the present invention, when attached to at least a portion of at least one surface of a 5 mm thick float glass, preferably meets protection level 2 (protection level required for residential, commercial and industrial buildings, etc.) specified in Table 3 of JIS R3109:2018, and more preferably meets protection level 3 (protection level required for buildings and structures where many people gather in one place, such as large office buildings, schools, shopping centers, and hotels).

[0059] As in the first embodiment, as an alternative means of impacting the impact body for evaluating disaster prevention performance (test based on JIS R3108), a kinetic energy of about 120 J (equivalent to a steel ball having a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 3000 ± 50 mm), more preferably a kinetic energy of about 240 J (equivalent to a steel ball having a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 6000 ± 50 mm), and even more preferably a kinetic energy of about 36 ...). Preferably, an impacting object with a kinetic energy of about 480 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg being dropped from a height of 12,000 ± 50 mm) may be used, and the impacting object may be dropped (collided) once on each vertex of an equilateral triangle with sides of 130 ± 20 mm at the centre of the area where the disaster prevention film is affixed, a total of three times. As a further alternative, a ball drop test can be conducted based on JIS R3108, except that the ball is dropped once from a height of 9m into a circle with a radius of 5cm from the center of the test glass plate. In this case, the following evaluation can be performed based on JIS R3109. A: After the test, the glass does not have a hole (opening) large enough for a 76 mm diameter sphere to pass through, and does not have any cracks longer than 125 mm. B: After the test, the glass has a hole (opening) large enough to pass a 76 mm diameter sphere through, or a crack longer than 125 mm. The impact in this impact test (ball drop height 9m) has an energy amount equivalent to "JD" in JIS R3109 (kinetic energy 350J). As a further alternative, impact with an impacting body having a predetermined kinetic energy may be used.

[0060] 3. Third aspect of the present invention (use of impact dispersion layer or impact propagation suppression layer for glass) A third (1) aspect of the present invention is a disaster prevention film to be attached to glass, the film being a laminate of a plurality of resin films, the laminate being either (i) a laminate film of a plurality of uniaxially oriented films formed from thermoplastic resins, the orientation directions of adjacent uniaxially oriented films crossing each other so as to disperse an impact from an impacting object, or (ii) at least one layer of the disaster prevention film being a laminate having at least one surface on which a plurality of grooves or irregularities are formed. A third (2) aspect of the present invention is a disaster prevention film that is attached to glass, and is formed from polycarbonate resin, thereby dispersing the impact of an impacting body. A third (3) aspect of the present invention is a disaster prevention film to be attached to glass, which includes an intermediate layer formed from at least one material selected from the group consisting of wire mesh, resin mesh, twisted yarn mesh, or metal, resin or twisted yarn filaments, and resin films disposed on both sides of the intermediate layer so as to suppress propagation of an impact from an impacting object to the glass. A third (4) aspect of the present invention is a disaster prevention film to be attached to glass, which is a multi-layer laminate formed from filaments which are spider silk or bagworm silk, thereby suppressing the propagation of an impact from an impacting object to the glass. In all of the above embodiments 3(1) to 3(4), a disaster prevention film is constructed that includes a layer having an impact dispersion function or a layer having an impact propagation suppression function to glass, and by attaching this to window glass, it has been surprisingly discovered that even if there is a strong impact from flying objects during a disaster such as a typhoon, the impact can be absorbed by the above configuration, fatal openings (holes) are not formed, and the airtightness of the interior can be maintained.

[0061] The third (1) aspect In this embodiment, the laminate of multiple resin films, which is a disaster prevention film that is attached to glass in use, is (i) a laminate film of multiple uniaxially oriented films formed from thermoplastic resins so as to disperse the impact of an impacting object, and the orientation directions of adjacent uniaxially oriented films cross each other, or (ii) at least one layer of the laminate has at least one surface on which multiple grooves or irregularities are formed.

[0062] Section 3(1)(i) In this embodiment, the uniaxially stretched film is obtained by uniaxially stretching a thermoplastic resin film. Examples of thermoplastic resins that form this thermoplastic resin film include polyester resins such as polyethylene terephthalate, polyethylene terenaphthalate, and polybutylene terephthalate, polyolefin resins such as polyethylene and polypropylene, polycarbonate resins, acrylic resins, cyclic olefin resins, styrene resins, methyl methacrylate-styrene resins, ABS (acrylonitrile-butadiene-styrene copolymer) resins, AS (acrylonitrile-styrene copolymer) resins, vinyl chloride resins, polyamide resins, polyacetal resins, polymethylpentene resins, polyphenylene ether resins, polyphenyl sulfide resins, polysulfone resins, polyethersulfone resins, polyetherimide resins, polyarylate resins, polyether ether ketone resins, and cellulose resins.

[0063] The thermoplastic resin film can be formed from such a thermoplastic resin as a raw material by melt extrusion molding, solution casting, calendaring, etc. The molding method is not limited to these, and a suitable molding method can be selected depending on the type of thermoplastic resin used and the dimensions such as the thickness and width of the laminate. In the case of melt extrusion molding, the stretching direction of a uniaxially stretched film may be any of a perpendicular direction, a parallel direction, and a diagonal direction to the extrusion flow direction, but among them, a perpendicular direction is preferable, in order to suppress warping of the film in the extrusion direction and to prevent wrapping around a cooling roll, a guide roll, a take-up roll, etc. during the extrusion process.

[0064] The thickness of each layer of the uniaxially stretched film is not particularly limited, but from the viewpoint of continuously unwinding the stretched film and feeding it between the first cooling roll and the second cooling roll while maintaining the strength of the stretched film during melt extrusion molding, it is usually about 5 to 500 μm, and preferably 10 to 300 μm.

[0065] A typical example of the uniaxially stretched film used in this embodiment is DUORA (thickness 0.200 mm), a uniaxially stretched PET film available from Sekisui Chemical Co., Ltd.

[0066] The number of uniaxially stretched films constituting the laminated film is not particularly limited, but from the viewpoint of improving the performance of dispersing the impact from an impacting body, a laminate of three or more films is preferable, and a laminate of four or more films is more preferable. In addition, the crossing direction of the orientation directions of adjacent uniaxially stretched films is not particularly limited as long as an intersection occurs, but in order to maximize the performance of dispersing the impact from an impacting body, they are usually arranged so that they cross at approximately right angles. The cross direction of the orientation directions of adjacent uniaxially stretched films may be adjusted preferably within the range of 90°±10°, more preferably within the range of 90°±5°.

[0067] Section 3(1)(ii) The resin constituting the laminate in this embodiment is not particularly limited, but from the viewpoint of properties such as flexibility, softness, elasticity, and high strength, it may be the same as the resin constituting the crime prevention film (first embodiment above). Examples of such resins include, but are not limited to, synthetic resins whose main component is a polyester resin such as polyethylene terephthalate (PET), and synthetic resins whose main component is a resin such as ethylene-vinyl acetate copolymer (EVA), polyethylene, polyurethane, polyvinyl butyral (PVB), or polycarbonate.

[0068] The plurality of grooves or projections formed on at least one surface of at least one layer of the plurality of resin films constituting the laminate is not particularly limited, and can be formed in any shape by any method. Examples of methods for forming grooves or irregularities include mechanical methods such as embossing using a chill roll containing a mesh, a method in which a chill roll or a pinch roll for an inflation method is heated and then thermally and mechanically embossed, and a method such as polishing with a brush. In the case of embossing with a mesh, for example, irregularities of about 30 to 300 meshes can be provided. The height of the irregularities is not particularly limited, but can be, for example, about 0.5 to 50 μm, and preferably about 1 to 30 μm.

[0069] The number of grooves or projections (the number of continuous grooves or the number of projections / recesses) is not particularly limited, but from the viewpoint of providing a dispersion performance of an impact from an impacting body, the more the better. The number of grooves or projections may be, for example, at least 3, 5 or more, 10 or more, 20 or more, 50 or more, or 100 or more.

[0070] The resin film having a plurality of grooves or projections formed on one or both sides thereof may be an intermediate layer or an end layer of the laminate. From the viewpoint of reliably dispersing the impact of an impacting body inside the laminate, it is preferable to use a resin film having a plurality of grooves or irregularities formed on one or both sides for the intermediate layer, whereas from the viewpoint of ease of construction, that is, the grooves or irregularities can be formed after the laminate is formed, it is preferable to use a resin film having a plurality of grooves or irregularities formed on one or both sides for the end layer.

[0071] Moreover, the laminate of a plurality of resin films in the third (1) embodiment may have an additional layer in addition to the laminate, so long as it does not impede the object of the present invention. Examples of such additional layers include a hard coat formed from a UV (ultraviolet) curable resin, for example, from the viewpoint of increasing the scratch resistance of the film. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0072] An adhesive may be used to bond the multiple resin films (and any additional layers) constituting the laminate in the third (1) embodiment, and to bond the laminate to glass. The adhesive is not particularly limited, but an adhesive composition containing a transparent adhesive such as the acrylic adhesive or silicone adhesive exemplified above, and optional components used as desired, can be used.

[0073] The acrylic pressure-sensitive adhesive is a pressure-sensitive adhesive composition containing an acrylic polymer and optional components used as desired. Examples of the acrylic polymer include (meth)acrylic acid ester monomers such as methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate, and stearyl (meth)acrylate; acrylic acid, methacrylic acid, itaconic acid, and β-carboxyethyl (meth)acrylate; Examples of the monomers include polymers or copolymers having one or more of the following monomers: a carboxyl group-containing monomer such as meth)acrylate; an epoxy group-containing monomer such as glycidyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate glycidyl ether; and a hydroxyl group-containing (meth)acrylic acid ester monomer such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate. Note that (meth)acrylic acid means acrylic acid or methacrylic acid. (Meth)acrylate means acrylate or methacrylate. As the acrylic polymer, one or more of these monomers may be used as a mixture. Examples of the optional components include silane coupling agents, compounds having two or more epoxy groups in one molecule, compounds having two or more isocyanate groups in one molecule, photopolymerization initiators, reaction catalysts, organic polyvalent metal compounds, antistatic agents, surfactants, leveling agents, thixotropy imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the acrylic polymer.

[0074] The silicone adhesive can be either an addition reaction type silicone adhesive or a peroxide curing type silicone adhesive. The addition reaction type silicone adhesive is an adhesive composition that includes a silicone polymer containing an organic group capable of addition reaction such as a vinyl group; an addition reaction catalyst such as a platinum compound such as chloroplatinic acid, a rhodium complex, and a ruthenium complex; and an optional component that is used as required. The peroxide curing type silicone adhesive is an adhesive composition that includes a silicone polymer, an organic peroxide such as benzoyl peroxide, and an optional component that is used as required. Examples of optional components used in these pressure-sensitive adhesive compositions include antistatic agents, surfactants, leveling agents, thixotropy-imparting agents, antifouling agents, printability improvers, antioxidants, weather resistance stabilizers, light resistance stabilizers, ultraviolet absorbers, heat stabilizers, pigments, and fillers. The amount of the optional components may be about 0.01 to 20 parts by mass based on 100 parts by mass of the silicone polymer.

[0075] The method for applying the pressure-sensitive adhesive is not particularly limited, but includes, as described above, spraying, flow coating, roll coating, brush coating, dip coating, spin coating, screen printing, casting, gravure printing, and flexographic printing. The pressure-sensitive adhesives and application methods thereof mentioned here can be similarly used in other embodiments of aspects 3(2) to 3(4) which will be described subsequently.

[0076] The thickness of the resin film laminate in the third (1) (i) or (ii) embodiment (the total thickness including the multiple resin films and the adhesive) is preferably as thick as possible from the standpoints of the performance of dispersing an impact from an impacting body and safety, and may be, for example, typically 50 μm or more, preferably 80 μm or more, and more preferably 100 μm or more. On the other hand, the thickness of the resin film laminate in the third (1) (i) or (ii) embodiment may be, for example, usually 3500 μm or less, typically 2500 μm or less, and preferably 2000 μm or less, from the viewpoint of workability in construction and taking into consideration the manufacturability of laminating multiple resin films having thicknesses of several tens of μm or more.

[0077] The glass to be combined with the disaster prevention film of the third (1) embodiment is not particularly limited, but as with the above, it is mainly assumed that it will be general-purpose float glass (without a metal mesh inserted inside) that is not wire-reinforced glass. The float plate glass here refers to float plate glass defined in JIS R3202:2011 "Float plate glass and polished plate glass". Such float glass sheets are typically made of silicate glass. The thickness of the float glass sheet may usually be any of 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 19 mm, 22 mm, 25 mm. Typically, the thickness of the float glass sheet may be 5 mm or 6 mm.

[0078] Third (2) Aspect A third (2) aspect of the present invention uses a film formed from a polycarbonate resin as a disaster prevention film to be attached to glass, which can disperse the impact of an impacting object. It should be noted that the phrase "formed from a polycarbonate resin" is synonymous with "formed including a polycarbonate resin" and does not preclude the use of components other than polycarbonate.

[0079] The polycarbonate resin used here is a polymer having a basic structure containing a carbonate bond, as represented by the following general formula. -(-OX 1 -OC(=O)-) m - (In the formula, X 1 is a hydrocarbon chain, which may contain heteroatoms and heterobonds.

[0080] The polycarbonate resin may be either an aromatic polycarbonate resin or an aliphatic polycarbonate resin, of which aromatic polycarbonate resin is preferred from the viewpoints of heat resistance, mechanical properties, etc.

[0081] There is no limitation on the type of polycarbonate resin, but examples thereof include polycarbonate polymers obtained by reacting a dihydroxy compound with a carbonate precursor. In addition to the dihydroxy compound and the carbonate precursor, a polyhydroxy compound or the like may be reacted. Carbon dioxide may be used as a carbonate precursor and reacted with a cyclic ether. The polycarbonate polymer may be linear or branched. Furthermore, the polycarbonate polymer may be a homopolymer consisting of one type of repeating unit, or a copolymer having two or more types of repeating units. The copolymer may be any copolymerization form such as a random copolymer or a block copolymer. Usually, such a polycarbonate polymer is a thermoplastic resin.

[0082] Examples of aromatic dihydroxy compounds that can be used as raw materials for aromatic polycarbonate resins include the following: Dihydroxybenzenes such as 1,2-dihydroxybenzene, 1,3-dihydroxybenzene (resorcinol), and 1,4-dihydroxybenzene; Dihydroxybiphenyls such as 2,5-dihydroxybiphenyl, 2,2'-dihydroxybiphenyl, and 4,4'-dihydroxybiphenyl; dihydroxynaphthalenes such as 2,2'-dihydroxy-1,1'-binaphthyl, 1,2-dihydroxynaphthalene, 1,3-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, and 2,7-dihydroxynaphthalene; dihydroxydiaryl ethers such as 2,2'-dihydroxydiphenyl ether, 3,3'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether, 1,4-bis(3-hydroxyphenoxy)benzene, and 1,3-bis(4-hydroxyphenoxy)benzene; 2,2-bis(4-hydroxyphenyl)propane (bisphenol A), 1,1-bis(4-hydroxyphenyl)propane, 2,2-bis(3-methyl-4-hydroxyphenyl)propane, 2,2-bis(3-methoxy-4-hydroxyphenyl)propane, 2-(4-hydroxyphenyl)-2-(3-methoxy-4-hydroxyphenyl)propane, 1,1-bis(3-tert-butyl-4-hydroxyphenyl)propane, 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane, 2,2-bis(3-cyclohexyl-4-hydroxyphenyl)propane, 2-(4-hydroxyphenyl)-2-(3-cyclohexyl-4-hydroxyphenyl)propane, α,α'-bis(4-hydroxyphenyl)-1,4-diisopropylbenzene, 1,3-bis[2-(4-hydroxyphenyl)-2-propyl]benzene, bis(4-hydroxyphenyl)methane, Bis(4-hydroxyphenyl)cyclohexylmethane, Bis(4-hydroxyphenyl)phenylmethane, Bis(4-hydroxyphenyl)(4-propenylphenyl)methane, Bis(4-hydroxyphenyl)diphenylmethane, Bis(4-hydroxyphenyl)naphthylmethane, 1,1-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 1,1-bis(4-hydroxyphenyl)-1-naphthylethan, 1,1-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)pentane, 1,1-bis(4-hydroxyphenyl)hexane, 2,2-bis(4-hydroxyphenyl)hexane, 1,1-bis(4-hydroxyphenyl)octane, 2,2-bis(4-hydroxyphenyl)octane, 1,1-bis(4-hydroxyphenyl)hexane, 2,2-bis(4-hydroxyphenyl)hexane, 4,4-bis(4-hydroxyphenyl)heptane, 2,2-bis(4-hydroxyphenyl)nonane, 1,1-bis(4-hydroxyphenyl)decane, 1,1-bis(4-hydroxyphenyl)dodecane, Bis(hydroxyaryl)alkanes such as; 1,1-bis(4-hydroxyphenyl)cyclopentane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3-dimethylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3,4-dimethylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3,5-dimethylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 1,1-bis(4-hydroxy-3,5-dimethylphenyl)-3,3,5-trimethylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3-propyl-5-methylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3-tert-butyl-cyclohexane, 1,1-bis(4-hydroxyphenyl)-4-tert-butyl-cyclohexane, 1,1-bis(4-hydroxyphenyl)-3-phenylcyclohexane, 1,1-bis(4-hydroxyphenyl)-4-phenylcyclohexane, Bis(hydroxyaryl)cycloalkanes such as; 9,9-bis(4-hydroxyphenyl)fluorene, Cardo structure-containing bisphenols such as 9,9-bis(4-hydroxy-3-methylphenyl)fluorene; 4,4'-dihydroxydiphenyl sulfide, Dihydroxydiaryl sulfides such as 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide; Dihydroxydiaryl sulfoxides such as 4,4'-dihydroxydiphenyl sulfoxide and 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide; 4,4'-dihydroxydiphenyl sulfone, Dihydroxydiarylsulfones such as 4,4'-dihydroxy-3,3'-dimethyldiphenylsulfone. The aromatic dihydroxy compound may be used alone or in any mixture of two or more kinds.

[0083] Examples of monomers from which aliphatic polycarbonate resins can be made include the following: alkanediols such as ethane-1,2-diol, propane-1,2-diol, propane-1,3-diol, 2,2-dimethylpropane-1,3-diol, 2-methyl-2-propylpropane-1,3-diol, butane-1,4-diol, pentane-1,5-diol, hexane-1,6-diol, and decane-1,10-diol; Cycloalkanediols such as cyclopentane-1,2-diol, cyclohexane-1,2-diol, cyclohexane-1,4-diol, 1,4-cyclohexanedimethanol, 4-(2-hydroxyethyl)cyclohexanol, and 2,2,4,4-tetramethyl-cyclobutane-1,3-diol; Glycols such as ethylene glycol, 2,2'-oxydiethanol (diethylene glycol), triethylene glycol, propylene glycol, and spiroglycol; aralkyldiols such as 1,2-benzenedimethanol, 1,3-benzenedimethanol, 1,4-benzenedimethanol, 1,4-benzenediethanol, 1,3-bis(2-hydroxyethoxy)benzene, 1,4-bis(2-hydroxyethoxy)benzene, 2,3-bis(hydroxymethyl)naphthalene, 1,6-bis(hydroxyethoxy)naphthalene, 4,4'-biphenyldimethanol, 4,4'-biphenyldiethanol, 1,4-bis(2-hydroxyethoxy)biphenyl, bisphenol A bis(2-hydroxyethyl)ether, and bisphenol S bis(2-hydroxyethyl)ether; Cyclic ethers such as 1,2-epoxyethane (ethylene oxide), 1,2-epoxypropane (propylene oxide), 1,2-epoxycyclopentane, 1,2-epoxycyclohexane, 1,4-epoxycyclohexane, 1-methyl-1,2-epoxycyclohexane, 2,3-epoxynorbornane, and 1,3-epoxypropane. These monomer compounds may be used alone or in any mixture of two or more kinds.

[0084] Examples of carbonate precursors that are raw materials for polycarbonate resins include carbonyl halides and carbonate esters. These carbonate precursors may be used alone or in any mixture of two or more kinds.

[0085] Examples of the carbonyl halide include phosgene; haloformates such as bischloroformates of dihydroxy compounds and monochloroformates of dihydroxy compounds; and the like.

[0086] Examples of carbonate esters include diaryl carbonates such as diphenyl carbonate and ditolyl carbonate; dialkyl carbonates such as dimethyl carbonate and diethyl carbonate; biscarbonates of dihydroxy compounds, monocarbonates of dihydroxy compounds, and carbonates of dihydroxy compounds such as cyclic carbonates.

[0087] The method for producing the polycarbonate resin is not particularly limited, and any known method can be used. For example, there can be mentioned an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, a solid-phase transesterification method of a prepolymer, and the like.

[0088] In the interfacial polymerization method (called the phosgene method when phosgene is used), a dihydroxy compound is reacted with a carbonate precursor (preferably phosgene) in the presence of an organic solvent inert to the reaction and an aqueous alkali solution, usually at a pH of 9 or higher, and then interfacial polymerization is carried out in the presence of a polymerization catalyst to obtain a polycarbonate resin. Note that a molecular weight regulator (terminal terminator) may be present in the reaction system as necessary, and an antioxidant may be present to prevent oxidation of the dihydroxy compound.

[0089] In the melt transesterification method, for example, a polycarbonate resin can be obtained by carrying out a transesterification reaction between a carbonic acid diester and a dihydroxy compound. Examples of the carbonic acid diester include dialkyl carbonate compounds such as dimethyl carbonate, diethyl carbonate, and di-tert-butyl carbonate; diphenyl carbonate; and substituted diphenyl carbonates such as ditolyl carbonate. Among these, diphenyl carbonate and substituted diphenyl carbonate are preferred, and diphenyl carbonate is more preferred. The carbonic acid diester may be used alone or in the form of a mixture of two or more.

[0090] The ratio of the dihydroxy compound to the carbonic acid diester is not particularly limited, but it is preferable to use an equimolar amount or more of the carbonic acid diester per 1 mole of the dihydroxy compound, and more preferably 1.01 moles or more. The upper limit is usually 1.30 moles or less. By setting the ratio in this range, the amount of terminal hydroxyl groups can be adjusted to a suitable range.

[0091] The amount of terminal hydroxyl groups in polycarbonate resins tends to have a large effect on thermal stability, hydrolysis stability, color tone, etc. The amount of terminal hydroxyl groups can be adjusted as necessary by any known method. In the transesterification reaction, a polycarbonate resin having an adjusted amount of terminal hydroxyl groups can usually be obtained by adjusting the mixing ratio of the carbonic acid diester and the aromatic dihydroxy compound, the degree of reduced pressure during the transesterification reaction, etc. This operation can usually also adjust the molecular weight of the obtained polycarbonate resin.

[0092] The terminal hydroxyl group concentration of the polycarbonate resin is not particularly limited, but may be usually 1000 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less, and may be usually 10 ppm or more, preferably 30 ppm or more, more preferably 40 ppm or more. The terminal hydroxyl group concentration here is the mass of the terminal hydroxyl group relative to the mass of the polycarbonate resin, expressed in ppm, and can be measured by colorimetry using the titanium tetrachloride / acetic acid method (the method described in Macromol. Chem. 88 215 (1965)).

[0093] When the amount of terminal hydroxyl groups is adjusted by adjusting the mixing ratio of the carbonic acid diester and the dihydroxy compound, the mixing ratio is as described above. As another method for adjusting the amount of the end terminator, a method of separately mixing a terminal terminator during the reaction can be mentioned. Examples of the terminal terminator include monohydric phenols, monovalent carboxylic acids, and carbonic acid diesters.

[0094] The molecular weight of the polycarbonate resin is not particularly limited, but the viscosity average molecular weight [Mv] calculated from the solution viscosity may be usually 10,000 or more, preferably 16,000 or more, more preferably 17,000 or more, and usually 40,000 or less, preferably 30,000 or less, more preferably 24,000 or less, from the viewpoint of mechanical strength and moldability. Two or more polycarbonate resins having different viscosity average molecular weights may be mixed and used, and polycarbonate resins having a viscosity average molecular weight outside the above-mentioned preferred range may be mixed (adjusting the viscosity average molecular weight of the mixture to be within the above-mentioned range). The viscosity average molecular weight [Mv] here is calculated by using methylene chloride as a solvent and using an Ubbelohde viscometer to determine the intrinsic viscosity [η] (unit: dl / g) at a temperature of 20°C, and then calculating the viscosity average molecular weight according to Schnell's viscosity formula, i.e., η = 1.23 × 10 -4 Mv 0.83 The intrinsic viscosity [η] is the value calculated from the specific viscosity [η sp ] is a value calculated using a specified formula.

[0095] The polycarbonate resin may be a single type or a mixture of multiple types. Also, an alloy (mixture) of polycarbonate resin and other thermoplastic resin may be used in combination. Furthermore, for example, polycarbonate resin may be constituted as a copolymer mainly composed of polycarbonate resin, such as a copolymer with an oligomer or polymer having a siloxane structure for the purpose of further improving flame retardancy and impact resistance; a copolymer with a monomer, oligomer or polymer having a phosphorus atom for the purpose of further improving thermal oxidation stability and flame retardancy; a copolymer with a monomer, oligomer or polymer having a dihydroxyanthraquinone structure for the purpose of improving thermal oxidation stability; a copolymer with an oligomer or polymer having an olefin structure such as polystyrene for improving optical properties; or a copolymer with a polyester resin oligomer or polymer for the purpose of improving chemical resistance. The polycarbonate resin may contain other optional components (one or more types) in an amount of, for example, 10% by mass or less. Examples of other components include, but are not limited to, resins other than polycarbonate resins, various resin additives, etc.

[0096] The method for forming a film from a polycarbonate resin is not particularly limited, and any known method can be used. The pelletized pellets may be molded into a film by various molding methods, or the resin may be melt-kneaded in an extruder and molded directly into a film without passing through pellets.

[0097] The film formed from the polycarbonate resin according to this embodiment may be formed of a single layer or multiple layers.

[0098] The film formed from the polycarbonate resin according to this embodiment may further be combined with other high hardness films. Resins that form such high-hardness films are not particularly limited, but include poly(meth)acrylamide resins. Commercially available examples of poly(meth)acrylamide include "ACRYMID TT70 (product name)" manufactured by Evonik. As the poly(meth)acrylamide resin film, for example, one described in WO / 2015 / 005049 can be used. Furthermore, as the poly(meth)acrylamide resin film, a transparent multi-layer film having the following structure as disclosed in Japanese Patent No. 6436640 may be used: (1) a transparent multilayer film in which a first poly(meth)acrylimide resin layer (α1) and an aromatic polycarbonate resin layer (β) are directly laminated in this order; or (2) A transparent multilayer film in which a first poly(meth)acrylamide resin layer (α1), an aromatic polycarbonate resin layer (β), and a second poly(meth)acrylamide resin layer (α2) are directly laminated in this order.

[0099] Furthermore, the film formed from the polycarbonate resin of this embodiment may have an additional layer other than the film and the adhesive, so long as it does not impede the object of the present invention. Examples of such additional layers include a hard coat formed from a UV (ultraviolet) curable resin, for example, from the viewpoint of increasing the scratch resistance of the film. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0100] In this embodiment, the thickness of the film formed from the polycarbonate resin is preferably as thick as possible from the standpoint of the performance of dispersing the impact from an impacting body and from the standpoint of safety, and may be, for example, typically 50 μm or more, preferably 80 μm or more, and more preferably 100 μm or more. On the other hand, the thickness of the film formed from the polycarbonate resin in this embodiment may be, for example, usually 4000 μm or less, typically 3000 μm or less, preferably 2500 μm or less, and more preferably 2000 μm or less, from the viewpoint of workability in application and taking into consideration manufacturability when laminating multiple films having a thickness of several tens of μm or more. In addition, when a film formed from the polycarbonate resin in this embodiment is combined with another high-hardness film, the total thickness is also preferably adjusted to be within the above range.

[0101] The glass to be combined with the disaster prevention film according to the third (2) embodiment is not particularly limited, but as with the above, it is mainly assumed that the glass will be general-purpose float glass (without a metal mesh inserted inside) that is not wire-reinforced glass. The float plate glass here refers to float plate glass defined in JIS R3202:2011 "Float plate glass and polished plate glass". Such float glass sheets are typically made of silicate glass. The thickness of the float glass sheet may usually be any of 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 19 mm, 22 mm, 25 mm. Typically, the thickness of the float glass sheet may be 5 mm or 6 mm.

[0102] The third (3) aspect In this embodiment, the disaster prevention film to be attached to the glass comprises an intermediate layer formed from at least one material selected from the group consisting of wire mesh, resin mesh, twisted yarn mesh, or metal, resin or twisted yarn filaments, and resin films arranged on both sides of the intermediate layer, thereby making it possible to suppress the propagation of the impact from an impacting object to the glass.

[0103] The wire mesh for the intermediate layer used in this embodiment is not particularly limited, and any commercially available product can be used. Examples of commercially available wire mesh include plain weave wire mesh, twill weave wire mesh, plain tatami weave wire mesh, twill tatami weave wire mesh, etc. Materials include iron, stainless steel, copper, nickel, etc. The surface of the wire mesh may be zinc-plated or otherwise subjected to known surface modification such as rust prevention. Typically, the mesh count of the wire mesh may be 100 mesh, 200 mesh, 300 mesh, 400 mesh, 500 mesh, or 635 mesh. A stack of multiple wire meshes may also be used.

[0104] The resin network of the intermediate layer used in this embodiment is not particularly limited, but may typically be a resin network formed from a thermoplastic resin. Examples of the resin net include, but are not limited to, a net-like body formed by laminating a first flat yarn row consisting of a plurality of first flat yarns and a second flat yarn row consisting of a plurality of second flat yarns extending in a direction intersecting (preferably substantially perpendicular) thereto, a knotted net formed by previously forming ropes from raw yarns and weaving the ropes together while making knots to form a net, etc. In the former case, the flat yarn is preferably formed from a stretched film of a thermoplastic resin. Various parameters such as the surface density of the resin in the resin network and the cross-sectional shape of the yarns can be appropriately adjusted so as to obtain the desired impact propagation suppression performance.

[0105] The thermoplastic resin forming the resin network is not particularly limited, but examples thereof include polyester resins such as polyethylene terephthalate, polyethylene terenaphthalate, and polybutylene terephthalate, polyolefin resins such as polyethylene and polypropylene, polycarbonate resins, acrylic resins, cyclic olefin resins, styrene resins, methyl methacrylate-styrene resins, ABS (acrylonitrile-butadiene-styrene copolymer) resins, AS (acrylonitrile-styrene copolymer) resins, vinyl chloride resins, polyamide resins, polyacetal resins, polymethylpentene resins, polyphenylene ether resins, polyphenyl sulfide resins, polysulfone resins, polyethersulfone resins, polyetherimide resins, polyarylate resins, polyether ether ketone resins, and cellulose resins.

[0106] The twisted yarn mesh of the intermediate layer used in this embodiment is not particularly limited, but typically, a mesh formed from twisted yarns obtained by twisting synthetic fiber raw yarns having a round cross section and / or an irregular cross section can be used. The shape of this irregular cross section is not particularly limited, and examples include a cross, -, diamond, star, T-shape, Y-shape, W-shape, triangle, and polygons with more than four sides.

[0107] The polymer forming the synthetic fiber of the raw yarn of the twisted yarn is not particularly limited, but known polymers such as polyester, polyamide, etc. can be used. A typical example is polyester. Examples of polyesters include homopolyester polymers or copolymers that have an aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid, or naphthalene-2,6-dicarboxylic acid, or an aliphatic dicarboxylic acid such as adipic acid or sebacic acid as the acid component, and a diol component such as ethylene glycol, diethylene glycol, 1,4-butadiol, neopentyl glycol, or cyclohexane-1,4-dimethanol. These polyesters may be added with or copolymerized with paraoxybenzoic acid, 5-sodium sulfoisophthalic acid, polyalkylene glycol, pentaerythritol, etc. Furthermore, they may be biodegradable polyesters. Specific examples thereof include polylactic acid polymers such as poly-D-lactic acid, poly-L-lactic acid, poly-D / L-lactic acid copolymers and polylactic acid stereocomplexes, polybutylene succinate, polyethylene succinate, poly(ε-caprolactone), and other biodegradable polyester polymers.

[0108] Examples of polyamides include polyimino-1-oxotetramethylene (nylon 4), polytetramethylene adipamide (nylon 46), polycapramide (nylon 6), polyhexamethylene adipamide (nylon 66), polyundecanamide (nylon 11), polylaurolactamide (nylon 12), polymetaxylene adipamide, and polyamide copolymers having these monomers as constituent units.

[0109] A plurality of polymers may be used in combination to form the synthetic fibers. Furthermore, the synthetic fibers may contain various additives, such as matting agents, pigments, light stabilizers, heat stabilizers, and antioxidants, as necessary, within the scope of not impairing the object of the present invention. Examples of twisted yarn nets include, but are not limited to, a net-like body formed by stacking a first flat yarn row consisting of a plurality of first flat yarns and a second flat yarn row consisting of a plurality of second flat yarns extending in a direction intersecting (preferably approximately perpendicular) thereto, similar to the resin net described above, and a knotted net formed by first forming twisted yarns into ropes and then weaving the ropes together while making knots to form a mesh. In addition, various parameters such as the surface density of the twisted yarn in the twisted yarn network and the fineness of the synthetic fibers can be appropriately adjusted so as to obtain the desired impact propagation suppression performance.

[0110] The material of the metal, resin or twisted yarn constituting the metallic, resin or twisted yarn filament of the intermediate layer used in this embodiment can be the same as the metal, resin or twisted yarn described above for the metal mesh, resin mesh and twisted yarn mesh.

[0111] The diameter of the metal, resin or twisted filament (the value obtained by converting the cross-sectional area of ​​each filament into the diameter of a circle) is not particularly limited, but from the viewpoints of shock propagation suppression and ease of handling and application, it may be, for example, 0.1 mm to 10 mm, and preferably 0.3 mm to 5 mm.

[0112] The method of arranging these filaments is not particularly limited, but for example, filaments having the same or different lengths may be aligned in one direction vertically and in one row horizontally, with adjacent filaments in close contact with each other. Also, multiple unidirectional layers aligned in this way may be stacked. Such an arrangement method makes it possible to more reliably suppress the propagation of the impact of an impacting body against the disaster prevention film. Alternatively, filaments having the same or different lengths may be arranged in one longitudinal direction and one transverse direction with a predetermined spacing (either regular or random) between adjacent filaments. Alternatively, filaments having the same or different lengths may be arranged randomly.

[0113] The resin forming the resin film arranged on both sides of the intermediate layer in this embodiment is not particularly limited, but is preferably a resin capable of forming a film having transparency, as in the second embodiment. As described above, transparency here usually means that the visible light transmittance of the resin film is 60% or more, preferably 70% or more, more preferably 80% or more, even more preferably 85% or more, and even more preferably 90% or more. Examples of such transparent resin films include films of cellulose ester resins such as triacetyl cellulose, polyester resins such as polyethylene terephthalate, cyclic hydrocarbon resins such as ethylene norbornene copolymers, acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and vinylcyclohexane-methyl (meth)acrylate copolymers, aromatic polycarbonate resins, polyolefin resins such as polypropylene and 4-methyl-pentene-1, polyamide resins, polyarylate resins, polymeric urethane acrylate resins, and polyimide resins. These films include non-stretched films, uniaxially stretched films, and biaxially stretched films. Also, a laminate film in which one or more of these are laminated in two or more layers may be used.

[0114] The thickness of the resin films disposed on both sides of the intermediate layer in this embodiment is not particularly limited, but may be, for example, 30 μm to 600 μm, and preferably 40 μm to 400 μm.

[0115] The disaster prevention film of this embodiment may have additional layers in addition to the intermediate layer, resin film, or adhesive used to bond them, as long as the additional layers do not impede the objectives of the present invention.

[0116] Examples of such additional layers include a hard coat formed from a UV (ultraviolet) curable resin from the viewpoint of increasing the scratch resistance of the resin film. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0117] The total thickness of the disaster prevention film of this embodiment (the total thickness of the single or multiple intermediate layers, the resin film, the adhesive bonding them together, and any other optional additional layers) is preferably as thick as possible from the standpoint of the ability to disperse impact from an impacting body and safety, and may be, for example, typically 80 μm or more, and preferably 100 μm or more. On the other hand, the total thickness of the disaster prevention film of this embodiment may be, for example, usually 2500 μm or less, typically 2000 μm or less, more preferably 1500 μm or less, and even more preferably 1000 μm or less, from the standpoint of construction workability and manufacturability when multiple intermediate layers having thicknesses of several tens of μm or more are laminated.

[0118] In this embodiment of the disaster prevention film, each layer may be formed sequentially from one side (with or without adhesive), or each layer may be formed first and then an adhesive may be applied to one or both sides of the layers to integrate them.

[0119] In the disaster prevention film of this embodiment, one of the resin films disposed on both sides of the intermediate layer may be replaced with an adhesive. The adhesive in this embodiment serves both as a substitute for the resin film that protects and covers the intermediate layer and as a bond to the glass that is combined with this disaster prevention film. Therefore, the types of adhesives that can be used in this case are those described above. The thickness of the layer formed by the pressure-sensitive adhesive in this embodiment may be, for example, 20 μm to 500 μm. The total thickness of the disaster prevention film in this embodiment may be within the above-mentioned range.

[0120] The glass to be combined with the disaster prevention film of this third (3) embodiment is not particularly limited, but as with the above, it is mainly expected to be general-purpose float glass (no metal mesh inserted inside) that is not wire-reinforced glass. The float plate glass here refers to float plate glass defined in JIS R3202:2011 "Float plate glass and polished plate glass". Such float glass sheets are typically made of silicate glass. The thickness of the float glass sheet may usually be any of 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 19 mm, 22 mm, 25 mm. Typically, the thickness of the float glass sheet may be 5 mm or 6 mm.

[0121] FIG. 3 shows a schematic cross-sectional view of an example of a structure in which the disaster prevention film according to the third (3) embodiment (embodiment using twisted filaments) is combined with float glass. In the figure, 8 indicates a disaster prevention film, 9 indicates a twisted yarn filament, 10 indicates a resin film, and 11 indicates float glass. (In the figure, an adhesive (layer) similar to that in the first and second embodiments may be disposed between each layer, but is not shown.)

[0122] The third (4) aspect In this embodiment, a multi-layer laminate formed from filaments of spider silk or bagworm silk is used as a disaster prevention film to be attached to glass, thereby making it possible to suppress the transmission of impact from an impacting object to the glass.

[0123] The spider silk or bagworm silk filament is not particularly limited and may be natural or artificially produced, but from the viewpoint of productivity, artificially produced ones can be used. Artificial spider silk is commercially available from Spiber Inc. under the trade name "QMONOS." A press release stated that the artificial bagworm silk was jointly developed by Kowa Company Ltd. and the National Agriculture and Food Research Organization.

[0124] Spider silk or bagworm silk filaments may be processed into a twisted yarn as required. The diameter of the filaments of spider silk or bagworm silk (processed into a twisted yarn as necessary) (the numerical value obtained by converting the cross-sectional area into the diameter of a circle) is not particularly limited, but from the viewpoints of shock propagation suppression and ease of handling and application, it may be, for example, 0.05 mm to 10 mm, and preferably 0.1 mm to 5 mm.

[0125] The filaments of spider silk or bagworm silk (processed into a twisted yarn as necessary) may be further processed into a mesh as explained in the third (3) embodiment, that is, a mesh-like body formed by stacking a first flat yarn row consisting of a plurality of first flat yarns and a second flat yarn row consisting of a plurality of second flat yarns extending in a direction intersecting (preferably substantially perpendicular) thereto, or a knotted mesh formed by forming a rope from twisted yarns in advance and weaving the rope together while making knots to form a mesh, etc. may be mentioned. Furthermore, the layer of spider silk or bagworm silk filaments can be at least two layers, preferably three or more layers, and more preferably four or more layers to form a laminate.

[0126] The disaster prevention film of this embodiment may have additional layers other than the laminate mentioned here or the adhesive used to bond the laminate, as long as the object of the present invention is not impaired.

[0127] Examples of such additional layers include, for example, a hard coat formed from a UV (ultraviolet) curable resin from the viewpoint of surface protection of the laminate. Examples of such UV curable resins include oligomers such as urethane oligomers, polyester oligomers, or epoxy oligomers having a plurality of ethylenic double bonds, monofunctional or polyfunctional oligomers such as pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA), or oligomers such as benzoin, benzophenone, benzoyl methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether, or dibenzyl. The UV curable resin may contain a reactive diluent or a photopolymerization initiator.

[0128] The total thickness of the disaster prevention film of this embodiment (the total thickness including the adhesive for bonding each layer of the laminate and any optional additional layers, if any) is preferably as thick as possible from the standpoint of the ability to disperse impact from an impacting body and safety, and may be, for example, typically 80 μm or more, and preferably 100 μm or more. On the other hand, the total thickness of the disaster prevention film of this embodiment may be, for example, usually 2500 μm or less, typically 2000 μm or less, more preferably 1500 μm or less, and even more preferably 1000 μm or less, from the standpoint of construction workability and taking into consideration the manufacturability of producing the film by laminating multiple layers having a thickness of several tens of μm or more.

[0129] The glass to be combined with the disaster prevention film of this third (4) embodiment is not particularly limited, but as with the above, it is mainly expected to be general-purpose float glass (no metal mesh inserted inside) that is not wire-reinforced glass. The float plate glass here refers to float plate glass defined in JIS R3202:2011 "Float plate glass and polished plate glass". Such float glass sheets are typically made of silicate glass. The thickness of the float glass sheet may usually be any of 2 mm, 2.5 mm, 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm, 8 mm, 10 mm, 12 mm, 15 mm, 19 mm, 22 mm, 25 mm. Typically, the thickness of the float glass sheet may be 5 mm or 6 mm.

[0130] The disaster prevention film according to the third (1) to (4) aspects of the present invention, when attached to at least a portion of at least one surface of a float glass having a thickness of 5 mm, preferably has a kinetic energy of about 1.6 J (corresponding to a steel ball having a diameter of 8 mm and weighing 2 g±0.1 g having an impact speed of 39.7 m / s, corresponding to "A" in JIS R3109) toward a selected position where the disaster prevention film is attached, preferably a kinetic energy of about 120 J (corresponding to a steel ball having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and weighing 1 kg±0.1 kg having an impact speed of 15.3 m / s, corresponding to "B" in JIS R3109), more preferably a kinetic energy of about 150 J (corresponding to a steel ball having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and weighing 2.05 kg±0.1 kg having an impact speed of 12.2 m / s, corresponding to "C" in JIS R3109). more preferably, the kinetic energy is about 350 J (equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 3.0 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 15.3 m / s, equivalent to a 4.1 kg±0.1 kg wood having a cross-sectional dimension of (38±1.5) mm×(89±1.5 mm) mm and a collision speed of 24.4 ... The material must not be penetrated or produce a hole through which a ball with a diameter of 76 mm can pass when struck vertically once or multiple times (preferably once when a wooden impactor is used, or a total of 30 times when a steel ball impactor is used) by an impactor of a type equivalent to "E" in R3109, and must not produce a hole through which a ball with a diameter of 76 mm can pass when continuously exposed to strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less for 10 minutes following single or multiple vertical collisions by the impactor. This test method is in accordance with JIS R3109:2018 "Test method for collision of flying objects during storms on architectural glass". The collision position of the impacting object (defined for each type of glass) is explained in the above standard. Those skilled in the art can understand that passing the above test at a specific collision position defined therein means that it can be estimated with a high probability that the above test will also be passed at any collision position. The disaster prevention film according to the third aspect of the present invention, when attached to at least a portion of at least one surface of a 5 mm thick float glass, preferably meets protection level 2 (protection level required for residential, commercial and industrial buildings, etc.) specified in Table 3 of JIS R3109:2018, and more preferably meets protection level 3 (protection level required for buildings and structures where many people gather in one place, such as large office buildings, schools, shopping centers, and hotels).

[0131] As in the first and second embodiments, as an alternative means of impacting the impact body for evaluating disaster prevention performance (test based on JIS R3108), a kinetic energy of about 120 J (equivalent to a steel ball having a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 3000 ± 50 mm), more preferably a kinetic energy of about 240 J (equivalent to a steel ball having a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 6000 ± 50 mm), and even more preferably a kinetic energy of about 360 J (equivalent to a steel ball having a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg dropped from a height of 6000 ± 50 mm). Preferably, an impacting object with a kinetic energy of about 480 J (equivalent to a steel ball with a diameter of 100 ± 0.2 mm and a mass of 4.11 ± 0.06 kg being dropped from a height of 12,000 ± 50 mm) may be used, and the impacting object may be dropped (collided) once on each vertex of an equilateral triangle with sides of 130 ± 20 mm at the centre of the area where the disaster prevention film is affixed, a total of three times. As a further alternative, a ball drop test can be conducted based on JIS R3108, except that the ball is dropped once from a height of 9m into a circle with a radius of 5cm from the center of the test glass plate. In this case, the following evaluation can be performed based on JIS R3109. A: After the test, the glass does not have a hole (opening) large enough for a 76 mm diameter sphere to pass through, and does not have any cracks longer than 125 mm. B: After the test, the glass has a hole (opening) large enough to pass a 76 mm diameter sphere through, or a crack longer than 125 mm. The impact in this impact test (ball drop height 9m) has an energy amount equivalent to "JD" in JIS R3109 (kinetic energy 350J). As a further alternative, impact with an impacting body having a predetermined kinetic energy may be used.

[0132] · Implementation of auxiliary installation sheet A disaster prevention window with enhanced disaster prevention functions can be constructed by using the disaster prevention window of the first aspect described above and including an auxiliary resin sheet that covers at least a portion of the window frame of the disaster prevention window and at least a portion of the surface of the wire-reinforced glass sheet that does not have the security film attached and / or at least a portion of the surface of the wire-reinforced glass sheet that has the security film attached. Here, when the security film is attached with a constant margin of 2 mm in the vertical direction from the window frame provided at the edge of the wire-reinforced glass sheet, it is preferable that the resin sheet for auxiliary installation covers the entire margin. Furthermore, a disaster prevention window with enhanced disaster prevention functions can be constructed by utilizing a disaster prevention window formed by attaching the disaster prevention film according to the second or third aspect above to at least a portion of at least one surface of window glass (for example the above-mentioned float glass) and including an auxiliary resin sheet that covers at least a portion of the window frame of the disaster prevention window and at least a portion of the surface of the window glass to which the disaster prevention film is not attached and / or at least a portion of the surface of the window glass to which the disaster prevention film is attached. Here, when the disaster prevention film is attached with a constant margin of 2 mm in the vertical direction from the window frame provided at the edge of the window glass, it is preferable that the resin sheet for auxiliary installation covers the entire margin.

[0133] As mentioned above, generally, the film can be applied to all exposed glass areas or to the edge of the glass plate with a 2mm margin in the vertical direction from the window frame, which is called partial application. In the case of partial application, the 2mm margin where the film is not applied is vulnerable to the impact of an impacting body in a disaster, and it is difficult to prevent the formation and expansion of an opening when the impacting body hits the window glass near the window frame. For this reason, by installing a resin sheet as an auxiliary near the window frame, it is possible to strengthen the protection of the area near the window frame, which is vulnerable to impact.

[0134] The resin sheet of this embodiment is not particularly limited, but for example, the crime prevention film of the first embodiment or the resin film of the second or third embodiment can be molded into an appropriate shape as necessary. The resin sheet may be applied to the entire window including the window frame, or a sheet of an appropriate width may be applied to the glass surface (surface portion where no film is attached) or to the four sides of the glass surface where the film is attached near the window frame and to cover the window frame. The width of the sheet that covers the four sides near the window frame and the window frame may be about 50 mm, preferably 30 mm or less, more preferably 25 mm or less.

[0135] Prior to the process of fitting window glass (wire-reinforced glass or float glass, etc.) into a window frame, it is preferable to apply a security film or disaster prevention film to the surface of the window glass in advance and then incorporate the film attached to the glass into the window frame (pre-application) (see Figure 4(a)). In Figure 4(a), 12 indicates the window glass, 13 indicates the security film or disaster prevention film, and 14 indicates the window frame. In this "pre-application", the security film or disaster prevention film is generally applied to the entire or substantially entire surface of the window glass (referred to as "full application"). Alternatively, as long as the entire surface of the window glass from the window frame toward the center is covered with film, there may be some margin of film at the edge of the window glass surface (the edge of the portion that fits into the window frame). In an alternative embodiment, after the process of fitting window glass (wire-reinforced glass or float glass, etc.) into a window frame, a "post-application" process may be carried out in which a security film or disaster prevention film is applied to the surface of the window glass (see FIG. 4(b)). In FIG. 4(b), 12 denotes the window glass, 13' denotes the security film or disaster prevention film, and 14 denotes the window frame. The security film or disaster prevention film 13' in the figure is a so-called partial application, which is an application to the edge of the window glass with a certain margin of about 2 mm in the vertical direction from the window frame. In such post-application, when the disaster prevention film is applied to the edge of the window glass with a certain margin of approximately 2 mm in the vertical direction from the window frame, it is preferable that the auxiliary application sheet covers this margin (preferably substantially completely) (see Figure 4(c) and Figures 5(a) and (b)). In FIG. 4(c), 12 denotes a window glass, 13' denotes a crime prevention film or disaster prevention film, 14 denotes a window frame, and 15 denotes an auxiliary installation sheet. The auxiliary installation sheet in FIG. 4(c) is typically depicted as being completely attached to the window glass on the surface of the margin between the window frame and the crime prevention film or disaster prevention film attachment location of the window glass. However, the attachment mode of the auxiliary installation sheet is not limited to this typical example. That is, as an alternative example of the attachment mode of the auxiliary installation sheet in FIG. 4(c), the surface of the margin between the window frame and the crime prevention film or disaster prevention film attachment location of the window glass may be only partially attached to the window glass surface (the other part may be floating without being attached to the window glass surface), or the entire sheet may be floating without being attached to the window glass surface. In Fig. 5(a) and (b), 16 is a window frame, 17 is a surface on the window glass where the security film or disaster prevention film is attached, 18 is an auxiliary sheet attached to the vertical frame of the window frame, and 19 is an auxiliary sheet attached to the horizontal frame of the window frame. The auxiliary sheets in Fig. 5(a) and (b) are illustrated as an installation mode in which the auxiliary sheets are attached overlapping each other at the four corners at the intersections of the long and short sides of the window frame so as not to cause wrinkles. However, the installation mode of the auxiliary sheets is not limited to this typical example. That is, as an alternative example of the installation mode of the auxiliary sheets in Fig. 5(a) and (b), the auxiliary sheets may be attached by cutting the overlapping parts at the four corners at the intersections of the long and short sides of the window frame so that the auxiliary sheets on the long and short sides do not overlap.

[0136] As another alternative embodiment, a resin, which is not particularly limited, typically any of the types of resin described above (for example, at least one selected from the group consisting of silicone resin, urethane resin, ethylene-vinyl acetate copolymer resin, butyral resin, soft polyvinyl chloride resin, acrylic resin, and adhesive, which are exemplified as resins that form the intermediate layer), can be applied (embedded) into the gap between the window frame and the window glass as a sealant (caulking material) and cured, thereby increasing the strength of the window glass and thereby improving its crime prevention and disaster prevention performance. EXAMPLES

[0137] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

[0138] [Manufacturing Examples 1-28] Disaster prevention windows (using wire-reinforced glass) having the layer structures shown in Tables 1 and 2 below, or combinations of float glass and disaster prevention films were produced. Moreover, Tables 3 and 4 show the configurations of Production Examples 1 to 19. Of these examples, the fire window and float glass / fire film combination according to the present invention are reasonably expected to perform as well as desired in this application.

[0139] The meanings of the terms and abbreviations used in the following tables and the commercial sources are as follows: PET100: Biaxially oriented polyethylene terephthalate film, Toyobo Co., Ltd.'s "Cosmoshine A4300" (product name), thickness 0.100 mm. PET50: Biaxially oriented polyethylene terephthalate film, Toyobo Co., Ltd.'s "Cosmoshine A4300" (product name), thickness 0.050 mm. PET50 with adhesive layer: The above PET50 is provided with an adhesive layer of the following acrylic adhesive 1. The method for producing PET50 with adhesive layer is as described in the following paragraph. PET200: The following acrylic adhesive 1 was applied to one side of the above PET100 using a roll coater, and dried and cured at 90°C for 2 minutes to form an adhesive layer 20 μm thick. Another PET100 was then laminated to form a biaxially oriented polyethylene terephthalate film laminate. PET350: A laminate of three layers of the above PET100 and one layer of the above PET50. The manufacturing methods of PET350 and PET350 with adhesive layer are as described in the following paragraphs. This PET350 may be referred to as "crime prevention film 350" hereinafter (therefore, PET350 with adhesive layer will be referred to as "crime prevention film 350 with adhesive layer"). · Urethane-PET film: Three sheets of polyurethane film "Tough Grace Film TG88-I" (product name) manufactured by Takeda Sangyo Co., Ltd., with a thickness of 0.170 mm (TPU 100 μm, PE 70 μm) were prepared. This film is a laminate of a 100 μm thermoplastic urethane resin layer and a 70 μm polyethylene layer, of which the polyethylene layer was peeled off and three thermoplastic urethane resin layers were laminated by applying heat of 160°C to form a 300 μm thermoplastic urethane resin layer. Next, the release paper 1 of the adhesive layer-attached PET350 was peeled off and the adhesive layer surface was attached to form a laminate of a thermoplastic urethane resin layer and PET350. Next, the adhesive layer surface of the adhesive layer-attached PET50 from which the release paper 1 was peeled off was attached to the surface of the thermoplastic urethane resin layer opposite to the surface attached to the PET350. Butyral layer 1: Polyvinyl butyral sheet, "S-LEC Film" (product name) manufactured by Sekisui Chemical Co., Ltd., thickness 0.38 mm. Butyral layer 2: A film formed by laminating two layers of the above butyral layer 1, each 0.38 mm thick, and thermocompressing the layers together. Butyral layer 3: A film made by laminating three layers of the above butyral layer 1, each 0.38 mm thick, and thermocompressing them together. Flexible PVC layer 1: 20 parts by mass of a phthalic acid plasticizer, 5 parts by mass of an epoxy plasticizer, and 2.5 parts by mass of a stabilizer (Ba-Zn liquid stabilizer) were blended with 100 parts by mass of polyvinyl chloride resin with a degree of polymerization of 1050, and melt-kneaded using a mixer kneader under the condition of a resin temperature of 140°C when discharged to obtain a polyvinyl chloride resin composition. Next, a 0.300 mm-thick flexible polyvinyl chloride resin (hereinafter "PVC") film was obtained using a Nippon Roll Co., Ltd. device equipped with a reverse L 4-roll calendar rolling machine and a winding device. Soft PVC layer 2: Two layers of the above 0.300 mm thick soft PVC film were laminated and heat-pressed at a roll surface temperature of 160°C to form the soft PVC layer 2. · Alpha gel layer 1 = Silicone sheet product name "Alpha Gel" manufactured by Taica Corporation. Auxiliary application sheet 1: The above-mentioned PET350 with adhesive layer was prepared and cut into strips 25 mm wide. Auxiliary application sheet 2: The release paper 1 was peeled off from the adhesive-layered PET350, and the adhesive surface of 3M's "VHB double-sided tape Y4825K-12 (product name)" (thickness 1.2 mm, width 25 mm) was attached to the adhesive surface of the resulting laminate, which was then cut into a strip to match the tape width of 25 mm. Auxiliary application sheet 3: The opposite side of a 20 mm wide tape, Taica's "α Gel Tape GT-2" (product name): was adhered to one side (adhesive layer side) of the above-mentioned PET350 with adhesive layer, and one side of the adhesive side of the above-mentioned 3M's "VHB Double-Sided Tape Y4825K-12" (product name): 1.2 mm thick, 25 mm wide, was adhered to the tape surface. This laminate was then cut into a strip to match the 20 mm tape width of the α Gel Tape. Release paper 1: Polyester film "Therapeel WZ" (product name) manufactured by Toray Film Processing Co., Ltd.: thickness 38 μm. Glass piece: 5mm thick float glass, 1100mm long x 900mm wide.

[0140] [Table 1]

[0141] [Table 2]

[0142] In Manufacturing Example 28, the security film 100 is partially attached in advance (attached vertically from the window frame with a 2 mm margin) to the "window glass with a window frame (wired glass 6.8 mm thick)" using an acrylic adhesive, following Manufacturing Example 1. The tape is attached so as to cover the margin and a substantial part of the window frame. In addition, instead of the above "Security Film 350 + Acrylic Adhesive Sheet", the following product can be used as a reinforcing tape. "Alpha Gel" (αGEL) manufactured by Taica Corporation Nitto Denko Corporation's "HYPERJOINT H7000" series, "HYPERJOINT H8000" series, and "HYPERJOINT H9000" series 3M's "VHB" acrylic foam structural bonding tape

[0143] [Table 3]

[0144] [Table 4]

[0145] Hereinafter, examples of the production of disaster prevention films according to preferred embodiments of the present invention and evaluation of the physical properties of the films when applied to window glass will be described.

[0146] Preparation of acrylic adhesive 1 The following materials were mixed to prepare acrylic adhesive 1. Acrylic adhesive: 100 parts by weight of "BPS5896" (product name) manufactured by Toyochem Co., Ltd. Hexamethylene diisocyanate: 0.25 parts by weight of "Duranate 21S-75E" (product name) manufactured by Asahi Kasei Chemicals Corporation Benzophenone-based UV absorber: 1 part by weight of "Seesorb 106 (product name)" manufactured by Shipro Chemical Co., Ltd. Ethyl acetate (solvent) 20 parts by weight

[0147] Manufacturing of PET350 with adhesive layer The acrylic adhesive 1 was applied to one side of the PET100 (first PET layer) using a roll coater, and dried at 90°C for 2 minutes to obtain an adhesive layer with a thickness of 20 μm. Next, another PET100 was laminated to the adhesive layer side of the first PET layer to form a second PET layer, and a similar adhesive layer was formed on the PET film side of the second PET layer. Next, another PET100 was laminated to the adhesive layer side of the second PET layer to form a third PET layer, and a similar adhesive layer was formed on the PET film side of the third PET layer. Next, the PET50 was laminated to form a fourth PET layer on the adhesive layer side to obtain PET350, a four-layer PET film laminate.

[0148] Furthermore, the above-mentioned acrylic adhesive 1 was applied to the PET film side of the first PET layer of PET350, which was the above-mentioned four-layer PET film laminate, using a roll coater, and dried at 90°C for 2 minutes to form an adhesive layer with a thickness of 35 μm. The surface of the adhesive layer was protected with release paper 1 to obtain PET350 with an adhesive layer.

[0149] Manufacturing of PET50 with adhesive layer The acrylic adhesive coating 1 was applied to one side of the PET 50 using a roll coater and dried at 90°C for 2 minutes to form an adhesive layer with a thickness of 20 μm. The surface was protected with release paper 1 to obtain PET 50 with an adhesive layer.

[0150] Example 1 (Security Film 350) The above-mentioned PET 350 with an adhesive layer (crime prevention film 350 with an adhesive layer) was used as test sample 1.

[0151] Example 2 (2 layers of Security Film 350) Two pieces of the above-mentioned PET 350 with an adhesive layer (security film 350 with an adhesive layer) were prepared, the release paper 1 was peeled off from one of the PET 350 with an adhesive layer, and the adhesive layer was bonded to the PET side of the other PET 350 with an adhesive layer to obtain test sample 2.

[0152] Example 3 (Three layers of Security Film 350) The release paper was peeled off from Test Sample 2 of Example 2, and the adhesive layer was attached to the PET surface side of the above-mentioned PET350 with adhesive layer, which had been separately prepared, to obtain Test Sample 3.

[0153] PVC-PET film manufacturing The acrylic adhesive 1 was applied to one side of the soft PVC layer 1 using a gravure coater and dried at 90° C. for 2 minutes to obtain an adhesive layer having a thickness of 20 μm. The PET 50 was laminated to the adhesive layer surface to obtain a PVC-PET film.

[0154] Example 4(Laminate of PVC-PET film and crime prevention film 350) The release paper 1 was peeled off from the PET350 with the adhesive layer, and the PVC surface of the PVC-PET film was attached to the adhesive layer surface to obtain a laminate of PET350 and the PVC-PET film. Next, the acrylic adhesive 1 was applied to the PET50 side of the PVC-PET film of the laminate using a roll coater, and dried at 90°C for 2 minutes to form an adhesive layer with a thickness of 35 μm. The surface was protected with release paper 1 to obtain test sample 4.

[0155] Example 5 (Laminate of PVB-PET film and crime prevention film 350) Two sheets of the butyral layer 1 were prepared and laminated at a temperature of 160°C to obtain a two-layer laminate (butyral layer 2), one side of which was coated with the acrylic adhesive coating 1 using a roll coater and dried at 90°C for 2 minutes to obtain an adhesive layer with a thickness of 20 μm. The PET50 was laminated to the adhesive layer surface to obtain a PVB-PET film. Next, the release paper 1 was peeled off from the PET350 with the adhesive layer, and the adhesive layer was bonded to the butyral resin side of the PVB-PET film to form a laminate. Next, the acrylic adhesive 1 was applied to the PET side of the PVB-PET film of the laminate using a roll coater, and dried at 90°C for 2 minutes to form an adhesive layer with a thickness of 35 μm. The surface of the adhesive layer was protected with the release paper 1 to form a test sample 5.

[0156] Example 6 (Laminate containing urethane-PET film and crime prevention film 350) The acrylic adhesive 1 was applied to the PET side of the urethane-PET film with adhesive layer PET 50 using a roll coater, and dried at 90°C for 2 minutes to form an adhesive layer with a thickness of 35 μm. The surface was protected with release paper 1 to produce test sample 6.

[0157] Example of auxiliary installation sheet Examples 7-9 The above auxiliary application sheet 1 was used as test sample 7. The above auxiliary application sheet 2 was used as a test sample 8. The above auxiliary application sheet 3 was used as a test sample 9.

[0158] Test piece preparation The above test samples 1 to 6 were cut into pieces having a width of 25 mm based on JIS A5759, and used as test pieces 1 to 6, respectively.

[0159] Tensile Strength Test The tensile strength of the above test pieces 1 to 6 was measured in accordance with JIS A5759. The measurement results are shown in Table 5.

[0160] Adhesion Test The adhesive strength of the above test samples 7 to 9 was measured in accordance with JIS A5759. The measurement results are shown in Table 5. (The adhesive strength of 30 N or more against the adherend glass is preferable.)

[0161] Examples 10-15 Test plate creation The release paper 1 was peeled off from the test samples 1 to 6, and the film of each sample was applied to the above glass pieces based on JIS R3108, and then the glass pieces with the film applied were fitted into a frame (window frame) to obtain test panels 10 to 15. This is a film application method called "pre-application" in the industry.

[0162] Embodiment of auxiliary installation sheet Example 16 The glass pieces were fitted into a frame (window frame) to form a framed glass plate. The film of the test sample 2 used in the above Example 2 was applied to the framed glass plate with a gap of 2 mm in the vertical direction from the edge of the frame to form a framed post-application test plate. This is a film application method called "post-application" in the industry.

[0163] The release paper 1 of the auxiliary application sheet 1 was peeled off, and the adhesive surface was attached to the glass and film surface of the framed post-application test plate on the surface on which the film was applied, with a width of 1 cm in the vertical direction from the edge of the frame on the long side, and the remaining part was attached along the top of the frame, as shown in Figures 5(a) and (b). In addition, the auxiliary application sheet 1 was attached to the short side of the same surface of the framed post-application test plate in the same manner as the long side. At the four corners at the intersections of the long side and short side, the overlapping parts of the auxiliary application sheet 1 were overlapped and attached so as not to cause wrinkles (as shown in Figures 5(a) and (b)). This was the test plate 16.

[0164] Examples 17-18 Test panels 17 to 18 were prepared in the same manner as in Example 16 above, except that auxiliary application sheets 2 and 3 were used instead of the auxiliary application sheet 1, respectively.

[0165] Test (Impact Test) The test plates 10 to 18 prepared above were subjected to the following impact tests 1 and 2. The evaluation results are shown in Table 6. Impact test 1 The ball drop test was conducted in accordance with JIS R3108, except that the ball was dropped once from a height of 9 m into a circle with a radius of 5 cm from the center of the test glass plate. The following evaluation was carried out based on JIS R3109. A: After the test, the glass does not have a hole (opening) large enough for a 76 mm diameter sphere to pass through, and does not have any cracks longer than 125 mm. B: After the test, the glass has a hole (opening) large enough to pass a 76 mm diameter sphere through, or a crack longer than 125 mm. The impact in Impact Test 1 (ball drop height 9 m) has an energy amount equivalent to "JD" in JIS R3109.

[0166] Impact test 2 The test and evaluation were carried out in the same manner as in Impact Test 1 above, except that the ball was dropped from a height of 12 m. The impact in Impact Test 2 (ball drop height 12 m) has an energy amount equivalent to "D" in JIS R3109.

[0167] [Table 5]

[0168] [Table 6]

[0169] Furthermore, it was confirmed that test panels 10 to 18 satisfy the criteria set forth above as desired characteristics for the second and third aspects of the present invention, namely, "when hit in a single or multiple vertical collisions with an impacting body having a kinetic energy of 120 J at any selected position where the disaster prevention film is affixed, no penetration occurs or a hole through which a ball having a diameter of 76 mm can pass is produced, and when exposed continuously for 10 minutes to strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less following single or multiple vertical collisions with the impacting body, no hole through which a ball having a diameter of 76 mm can pass is produced." [Industrial Applicability]

[0170] The disaster prevention windows of the various aspects of the present invention, or the disaster prevention films used to construct the disaster prevention windows, do not create fatal openings (holes) and can maintain indoor airtightness even when subjected to a strong impact from flying objects during a disaster such as a typhoon, and are therefore suitable for use as windows in buildings and vehicles, and are particularly suitable for use as windows in homes and commercial and industrial buildings, as well as in buildings and structures where many people gather in one place, such as large office buildings, schools, shopping centers, and hotels. [Explanation of symbols]

[0171] 1: Disaster prevention window 2a: Metal mesh 2: Wire-inserted glass plate with a metal mesh (2a) inserted inside the glass 3: Plastic security film 4: Disaster prevention film 5: Middle layer 6: Plastic film 7: Float glass (object to which disaster prevention film is attached) 8: Disaster prevention film 9: Twisted filament 10: Plastic film 11: Float glass 12: Window glass 13: Security film or disaster prevention film 13': Security film or disaster prevention film (partial application) 14: Window frame 15: Auxiliary construction sheet 16: Window frame 17: Surface of window glass to which crime prevention film or disaster prevention film is attached 18: Auxiliary installation sheet installed on the vertical frame of the window frame 19: Auxiliary installation sheet installed on the horizontal frame of the window frame

Claims

1. A disaster prevention window used in a structure, A resin-made crime prevention film having glass penetration prevention performance as specified in JIS A5759:2008 is attached to at least a portion of at least one surface of a wire-reinforced glass sheet having a metal mesh inserted inside the glass. Emergency window.

2. 2. The disaster prevention window according to claim 1, wherein the security film has a margin of a constant width of 2 mm in the vertical direction from the window frame provided at the edge of the wire-reinforced glass sheet, or is attached to the entire window without having any margin.

3. A disaster prevention window as described in claim 1 or claim 2, which does not penetrate or create a hole through which a 76 mm diameter ball can pass when it is hit multiple times in the vertical direction by an impacting object with kinetic energy of 120 J at an arbitrary position where the security film is affixed, and which does not create a hole through which a 76 mm diameter ball can pass when it is continuously exposed to strong vertical wind pressure with an average wind speed of 41 m / s or more and 48 m / s or less for 10 minutes following multiple vertical collisions by the impacting object.

4. A disaster prevention window according to any one of claims 1 to 3, and A resin sheet for auxiliary installation is provided to cover at least a portion of the window frame of the disaster prevention window, at least a portion of the surface of the wire-reinforced glass sheet on which the crime prevention film is not attached, and / or at least a portion of the surface of the wire-reinforced glass sheet on which the crime prevention film is attached. Including disaster prevention windows.

5. The disaster prevention window according to claim 4, wherein the security film is attached with a margin of a constant width of 2 mm in the vertical direction from the window frame provided on the edge of the wire-reinforced glass sheet, and a resin sheet for auxiliary installation covers the entire margin.

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