TW202237948A - Sheet for smokeproof hanging wall and smokeproof hanging wall excellent in tear strength, hard to deform in the event of fire, noncombustible, and suitable for use as a sheet for smokeproof hanging wall - Google Patents

Abstract

The main object of the present invention is to provide a sheet that is excellent in the tear strength, hard to deform in the event of fire, noncombustible, and suitable for use as a sheet for smokeproof hanging wall, and a smokeproof hanging wall having the sheet. A sheet for smokeproof hanging wall includes: a thermoplastic resin film; and a curable resin layer, which is laminated on both sides of the thermoplastic resin film and contained in the sheet by being impregnated into a glass fiber fabric. The thickness of the thermoplastic resin film is 90-130 [mu] m, and the mass of the sheet is 300-450 g/m2.

Description

Sheet for smoke-proof hanging wall and smoke-proof hanging wall

The present invention relates to a sheet that can be used as a sheet for a smoke-proof wall (wall member of a smoke-proof wall) and a smoke-proof wall using the sheet.

Background technique Starting with Japan, the laws and regulations of various countries (for example, in the case of Japan, the Building Standards Act and the Enforcement Order of the Building Standards Act) have stipulated that it is necessary to prevent the flow of smoke and toxic gases generated in the event of a building fire so that evacuation can be carried out smoothly. and fire-fighting activities to set up smoke exhaust equipment. Therefore, buildings such as office buildings and commercial facilities are often equipped with smoke-proof vertical walls as smoke exhaust equipment and smoke-shielding equipment.

In order to temporarily block the flow of smoke and toxic gases to the corridors and upper floors in the event of a fire to ensure the time required for evacuation, the smoke-proof vertical wall is usually installed on the ceiling of the building. Therefore, glass plates, resin composites of glass fiber and resin, etc. are used as smoke-proof walls in order not to block the view or damage the appearance due to the smoke-proof walls. Compared with the glass plate, the resin composite body of glass fiber and resin has the advantage of not being easily broken. For example, Patent Document 1 discloses a transparent non-combustible sheet comprising a glass fiber fabric and a hardened resin layer. Prior art literature patent documents

[Patent Document 1] Japanese Unexamined Patent Publication No. 2005-319746

Summary of the invention The problem to be solved by the invention The transparent non-combustible sheet disclosed in Patent Document 1 has the following problems: the tear strength is not good, and it is easy to crack when it is constructed as a smoke-proof wall (especially when it is constructed as a tension-type smoke-proof wall). In addition, the tension-type smoke-proof hanging wall refers to the hanging wall formed by stretching a sheet between two pairs of mullions. For example, when hanging from the ceiling, there is no smoke-proof hanging on the lower side of the sheet. wall.

Here, in order to solve the above problems, the present invention aims to provide a sheet material and a smoke-proof vertical wall with the sheet material. Smoke-proof vertical wall sheet. means to solve problems

In order to solve the above-mentioned problems, the inventors of the present case found out after careful study that it is very important to provide a thermoplastic resin film in the sheet for smoke-proof vertical walls in order to increase the tear strength. Here, in order to improve the transparency of the sheet for smoke prevention vertical walls, it is important to improve the transparency of the thermoplastic resin film. However, when adopting such as highly transparent polyethylene terephthalate film and polycarbonate film as the thermoplastic resin film in order to improve the transparency of the thermoplastic resin film, because the film is relatively expensive, if the heat is increased The number of layers of the plastic resin film and the cost of the sheet for the smoke-proof vertical wall will also increase relatively.

Therefore, the inventors of this case found that if the sheet for smoke-proof vertical wall adopts the following layer structure and the thickness of the thermoplastic resin film is above a specific range, the tear strength of the sheet can be improved, and at the same time, due to the thermoplastic resin There is only one layer of film, even if the thermoplastic resin film is relatively expensive, it can still be manufactured at a relatively low cost; the layer structure is stacked in sequence: it is included in the state of being impregnated with glass fiber cloth Curable resin layer/thermoplastic resin film/curable resin layer impregnated with glass fiber cloth.

However, the inventors of the present case have learned after research that if only the sheet for the smoke-proof vertical wall is laminated sequentially with the curable resin layer/thermoplastic resin film/the The layer structure of the curable resin layer impregnated in the state of glass fiber cloth, and at the same time make the thickness of the thermoplastic resin film more than a certain range, and cannot have the properties of being difficult to deform and non-flammable in a fire, and It cannot possess the performance necessary for use as a smoke-proof vertical wall.

Here, the inventors of the present application evaluated whether the sheet for a smoke prevention vertical wall is not easily deformed in a fire by observing whether or not deformation occurs during a heating test. Then, the inventors of this case discovered that when heating the sheet for smoke-proof vertical wall, the thermoplastic resin film is easier to heat shrink than the curable resin layer. If the thickness of the thermoplastic resin film is too large, the degree of heat shrinkage of the thermoplastic resin film is accordingly When the thickness increases, the entire sheet for smoke prevention vertical walls becomes more likely to be deformed. The inventors of this case continued to study further and found that in order to make the sheet for the smoke prevention wall have excellent tear strength, not easily deformed and non-flammable in the event of a fire, the sheet for the smoke prevention wall should contain "thermoplastic resin film" ” and “hardened resin layers laminated on both sides of the thermoplastic resin film and impregnated with glass fiber cloth” and the thickness of the thermoplastic resin film and the quality of the smoke-proof vertical wall sheet are specified. The scope is very important. The present invention is an invention based on the above-mentioned knowledge and insights and repeated careful research.

That is, the present invention provides inventions of the following disclosed aspects. Item 1. A sheet comprising: a thermoplastic resin film; and curable resin layers laminated on both sides of the thermoplastic resin film and impregnated with glass fiber cloth; The thickness of the plastic resin film is 90~130μm, and the mass of the aforementioned sheet is 300~450g/m ² . Item 2. The sheet according to Item 1, wherein the thickness of the aforementioned thermoplastic resin film is 120-130 μm, and the mass of the aforementioned sheet is 350-430 g/m ² . Item 3 The sheet according to Item 1 or 2, wherein the resin forming the curable resin layer is a photocurable resin. Item 4. The sheet according to Item 1 or 2, wherein the thermoplastic resin is polyethylene terephthalate. Item 5 The sheet according to Item 1 or 2, wherein the bromine concentration of the curable resin layer is 5 to 30% by mass. Item 6 The sheet according to Item 1 or 2, wherein the total light transmittance is 80% or more and the haze is 20% or less. Item 7 The sheet material in Item 1 or 2, which has a tear strength of 30N or more. Item 8 The sheet according to Item 1 or 2, which has a surface resistivity of 5×10 ¹² Ω or less. Item 9 As for the sheet in Item 1 or 2, when it is subjected to a heat generation test irradiated with 50kW/m2 radiant heat, the total heat generation will be below 8MJ/m2 ²⁰ minutes after the start of heating. Item 10 The sheet material in Item 1 or 2, when subjected to a heat generation test of radiant heat of 50kW/m ² , 20 minutes after the start of heating, the heat generation rate does not exceed 200kW/m ² for more than 10 seconds. Item 11. Use of a sheet as a smoke-proof vertical wall sheet, which is the sheet according to any one of Items 1 to 10. Item 12 is the same as item 11, wherein the above-mentioned smoke-proof vertical wall is a tension-type smoke-proof vertical wall. Item 13. A smoke-proof vertical wall comprising the sheet material according to any one of Items 1 to 10. Item 14. A method for manufacturing a sheet, the sheet being the sheet according to any one of Items 1 to 10, and the manufacturing method includes: Step 1, preparing an intermediate sheet A for forming a curable resin layer of hardening resin solution B, glass fiber cloth C and engineering film D, the intermediate sheet A is laminated with a thermoplastic resin film with a thickness of 90-130 μm on the hardening resin layer, and the hardening resin layer is impregnated in the state of glass fiber cloth; and step 2, using the aforementioned intermediate sheet A and the aforementioned engineering film D, and making the thermoplastic resin film surface side of the aforementioned intermediate sheet A on the aforementioned glass fiber cloth C In the side-by-side method, the aforementioned glass fiber cloth C impregnated with the aforementioned hardening resin solution B is clamped, and the aforementioned hardening resin solution B is hardened in this state, thereby producing a sheet with a mass of 300~450g/ ^m2 material. Invention effect

The sheet of the present invention has excellent tear strength, is not easily deformed and inflammable in a fire, and can be suitably used as a sheet for smoke-proof vertical walls. Moreover, according to this invention, the smoke prevention vertical wall provided with this sheet material can be provided.

Embodiments for Carrying Out the Invention 1. Sheet The sheet of the present invention is a sheet comprising a thermoplastic resin film and a curable resin layer laminated on both sides of the thermoplastic resin film and impregnated with glass fiber cloth. The sheet material is characterized in that: the thickness of the aforementioned thermoplastic resin film is 90-130 μm, and the mass of the aforementioned sheet material is 300-450 g/m ² . Hereinafter, the sheet of the present invention will be described.

[Layer structure of sheet] The sheet 1 of the present invention includes a "thermoplastic resin film 2" and a "curable resin layer 4 laminated on both sides of the thermoplastic resin film 2 and impregnated in a glass fiber cloth 3". An example of a schematic cross-sectional view in the thickness direction of the sheet 1 of the present invention is shown in FIG. 1 . The sheet 1 shown in FIG. 1 has: curable resin layer 4 impregnated with glass fiber cloth 3 / thermoplastic resin film 2 / curable resin impregnated with glass cloth 3 A layer structure in which layer 4 is laminated in sequence. That is, the sheet 1 of the present invention shown in FIG. 1 includes a thermoplastic resin film 2 , two glass fiber cloths 3 and two curable resin layers 4 .

In FIG. 1, the curable resin layer 4 fills the gaps between the plurality of glass fibers constituting the glass fiber cloth 3, and one surface side portion 41 of the curable resin layer 4 communicates with the other surface side portion 42 through the gap portion.

In the sheet 1 of the present invention, the number of layers of the thermoplastic resin film 2 that can be provided is not particularly limited, but it is preferably one layer from the viewpoint of lowering the cost. In addition, other layers such as an adhesive layer may be included between the thermoplastic resin film 2 and the curable resin layer 4 , and the curable resin layer 4 may be directly laminated on the thermoplastic resin film 2 . It is preferable to directly laminate the curable resin layer 4 on the thermoplastic resin film 2 from the viewpoint of further improving the transparency and the viewpoint of lower-cost manufacturing.

[Structure of each layer] The composition of each layer constituting the sheet 1 of the present invention will be described in detail below.

Thermoplastic resin film 2 The sheet 1 of the present invention includes a thermoplastic resin film 2 . This can make the sheet have excellent tear strength.

The type of thermoplastic resin constituting the thermoplastic resin film 2 is not particularly limited, but from the viewpoint of improving the transparency of the sheet, thermoplastic resins other than polyvinyl chloride are preferable. Polyvinyl chloride film contains a large amount of plasticizer. When used as a smoke-proof wall, the plasticizer may seep out of the surface and adversely affect the visibility of the smoke-proof wall. Specific examples of the thermoplastic resin constituting the thermoplastic resin film 2 include polyester, polycarbonate, polyolefin, polyamide, and polycycloolefin. Among these, polyester is particularly preferable. Polyester can be specifically exemplified as polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyethylene-2,6-naphthalate (PEN), especially polyethylene terephthalate (PET). Ethylene terephthalate (PET).

The thermoplastic resin film 2 may be either an unstretched film or a stretched film, but a stretched film is preferable, and a biaxially stretched film is more preferable from the viewpoint of further improving transparency.

The thickness of the thermoplastic resin film 2 is 90-130 μm. By making it into such a thickness, the resulting sheet has excellent tear strength, and has the characteristics of not being easily deformed and not being flammable in the event of a fire. From the point of view of making the sheet 1 of the present invention have more ideal tear strength, non-deformable characteristics and non-flammable characteristics during fire, the thickness of the thermoplastic resin film 2 is preferably 100-130 μm, more preferably 120 μm. ~130 μm.

In the sheet 1 of the present invention, the mass of the thermoplastic resin film 2 is, for example, 100-200 g/m ² . From the point of view that it is easier to balance the improvement of the tear strength of the sheet with the non-flammable property, the mass of the thermoplastic resin film 2 is preferably 130-180 g/m ² , more preferably 160-180 g/m ² .

The total light transmittance of the thermoplastic resin film 2 is not particularly limited, but can be, for example, more than 85%, preferably more than 90%, more preferably 91-98%. In addition, the haze of the thermoplastic resin film 2 is not particularly limited, but may be, for example, 5% or less, preferably 1.5% or less, more preferably 0.3-1.0%. In this specification, the total light transmittance of the thermoplastic resin film layer 2 is a value measured in accordance with Japanese Industrial Standard JIS K7361-1 1997 "Plastic-Test method for total light transmittance of transparent materials - Part 1: Single beam method" . In addition, the haze of the thermoplastic resin film layer 2 is a value measured in accordance with the Japanese Industrial Standard JIS K7136 2000 "Plastic-Transparent Material Haze Calculation Method".

In addition, as an example of the thermoplastic resin film 2, what does not contain bromine substantially is mentioned. Here, "substantially not containing bromine" means that the bromine concentration of the thermoplastic resin film 2 is 1% by mass or less. As an example of the thermoplastic resin film 2, the thing whose bromine concentration is 0.1 mass % or less or does not contain bromine is mentioned. In this specification, the bromine concentration of the thermoplastic resin film 2 is a value measured using energy dispersive X-ray analysis (EDS analysis).

Fiberglass Cloth 3 The glass fiber cloth 3 series is composed of a large number of glass fibers. In the glass fiber cloth 3 , many glass fibers are entangled with each other to form a single cloth. The glass fiber cloth 3 can be, for example, a glass fiber fabric (glass cloth) composed of many warp yarns and many weft yarns. The weaving structure of the glass fiber fabric is not limited, and examples include plain weave, satin weave, twill weave, diagonal weave and furrow weave.

When the glass fiber cloth 3 is a glass fiber fabric, its weaving density is not particularly limited, but for example, the weaving density of warp yarns can be 30-120 warps/25mm, preferably 40-190 warps/25mm, more preferably 50 ~70 threads/25mm; the weaving density of weft yarns can be 30~120 threads/25mm, preferably 40~90 threads/25mm, more preferably 50~70 threads/25mm. In this specification, the weaving density is a value measured according to the method stipulated in "7.9 Density (weaving density)" of the Japanese Industrial Standard JIS R 3420:2013 "General Test Methods for Glass Fiber".

The glass material of the glass fibers constituting the glass fiber cloth 3 is not particularly limited, and known glass materials can be used. Examples of glass materials include alkali-free glass (E glass), acid-resistant alkali-containing glass (C glass), high-strength/high-elasticity glass (S glass, T glass, etc.), and alkali-resistant glass (AR glass). Among these glass materials, alkali-free glass (E glass) is more suitable because of its high versatility. The glass fibers constituting the glass fiber cloth 3 may be composed of only one type of glass material, or may be formed by combining two or more types of glass fibers composed of different glass materials. In addition, from the viewpoint of improving the transparency of the sheet 1, it is preferable to select a glass material having a refractive index similar to that of the curable resin layer 4 described later.

The glass fibers constituting the glass fiber cloth 3 are preferably glass yarns formed by twisting a plurality of single fibers belonging to glass long fibers. The number of single fibers contained in each glass yarn can be, for example, about 30-400, preferably about 40-200, more preferably about 40-120, and more preferably about 80-120. In addition, the average diameter of the single fiber in the glass yarn can be, for example, about 3.0-6.0 μm, preferably about 3.0-5.5 μm, and more preferably about 4.8-5.5 μm. The count of the glass yarn can be 3~30 tex, preferably 1~12 tex, more preferably 1~6 tex, more preferably 4~6 tex, especially 5~6 tex. In this specification, the number of single fibers contained in each glass yarn is a value obtained by the following method: under a scanning electron microscope (SEM), observe the individual fibers constituting each glass yarn at a magnification of 500 times for 20 glass yarns. The cross-section of the fiber is used to measure the number of single fibers contained in each glass yarn, and then calculate the average value. The average diameter of the single fiber in the glass yarn is a value obtained by using the following method: under a scanning electron microscope (SEM), observe the cross-section of the single fiber constituting each glass yarn at a magnification of 500 times for 20 glass yarns, and measure it The diameter of the entire single fiber (the largest part), and then calculate its average value. The unit tex of the count of glass yarn is equivalent to grams per 1000m, which is measured according to the method stipulated in "7.1 Count" of JIS R 3420 2013 "General Test Methods for Glass Fibers" of Japanese Industrial Standards.

The glass fiber cloth 3 may be composed of one type of glass yarn, or may be composed of two or more types of glass yarns that differ in the number, diameter, and count of single fibers constituting the glass yarn.

The single sheet thickness of the glass fiber cloth 3 can be, for example, 10-60 μm, preferably 25-50 μm, more preferably 25-35 μm. In this specification, the single sheet thickness of the glass fiber cloth 3 is a value measured according to the method A stipulated in "7.10.1 Fabric Thickness" of the Japanese Industrial Standard JIS R3420:2013 "General Test Methods for Glass Fiber".

In addition, the mass of each piece of glass fiber cloth 3 can be, for example, 10~60g/m ² , preferably 25~50g/m ² , more preferably 25~35g/m ² .

The difference in refractive index between the glass fiber cloth 3 and the curable resin layer 4 described later is, for example, 0.05 or less, preferably 0.02 or less, more preferably 0.01 or less. The refractive index of the glass fiber cloth 3 can be, for example, about 1.45~1.65, preferably about 1.50~1.60. In this specification, the refractive index of the glass fiber cloth 3 is a value measured according to the "Method B" stipulated in the Japanese Industrial Standard "JIS K 7142:2008 Plastics - Calculation method of refractive index".

The glass volume ratio of the glass fiber cloth 3 is not particularly limited, but is preferably 38% or more. The glass fiber cloth 3 with a glass volume ratio of 38% or more can be obtained by, for example, performing fiber opening treatment on glass fibers. In this specification, the glass volume ratio of the glass fiber cloth 3 is the value calculated by the following formula. [Mathematical formula 1] Glass volume (%)=(A/(B×C))×100 (II) A: Mass of glass fiber cloth (g/m ² ) B: Specific gravity of glass material constituting glass fiber cloth (g /m ³ ) C: Thickness of glass fiber cloth (m)

In the sheet 1 of the present invention, the mass ratio of the glass fiber cloth 3 to the curable resin layer 4 is not particularly limited, but from the viewpoint of improving the transparency of the sheet 1, for example: The total mass of the glass fiber cloth 3 and the curable resin layer 4 is 100 parts by mass, and the glass fiber cloth 3 is 20-50 parts by mass, preferably 20-40 parts by mass, more preferably 25-35 parts by mass. In addition, in the sheet 1 of the present invention, the mass ratio of the glass fiber cloth 3 is not particularly limited, but from the viewpoint of improving the transparency of the sheet 1, for example: relative to the sheet 1 The total mass is 100% by mass, and the total mass of 2 pieces of glass fiber cloth 3 is 5-30% by mass, preferably 10-25% by mass.

The two glass fiber cloths 3 arranged in the sheet 1 of the present invention may be the same or different from each other.

Hardening resin layer 4 In the sheet 1 of the present invention, the curable resin layer 4 is included in a state of being impregnated with the aforementioned glass fiber cloth 3, and is formed of a cured product of the curable resin. Specifically, the curable resin layer 4 is formed of a cured product obtained by applying energy such as light or heat to the curable resin to harden the curable resin.

From the viewpoint of further improving the transparency of the sheet 1, the curable resin is preferably one that can make the refractive index of the curable resin layer 4 and the above-mentioned glass fiber cloth 3 approximate. The curable resin is preferably a photocurable resin. Examples of photocurable resins include vinyl resins, urethane acrylic resins, urethane acrylate resins, unsaturated polyester resins, curable acrylic resins, and epoxy resins.

Examples of the above-mentioned vinyl ester resin include bisphenol A vinyl ester, brominated bisphenol A vinyl ester, and novolac vinyl ester. Among these vinyl ester resins, it is particularly preferable to include one or more selected from the group consisting of bisphenol A vinyl ester, brominated bisphenol A vinyl ester, and novolac vinyl ester, and More preferably, bisphenol A vinyl ester and brominated bisphenol A vinyl ester are used together.

A suitable example of the curable resin forming the curable resin layer 4 is a curable resin composition containing acrylic syrup. By using a curable resin composition containing acrylic resin paste, the transparency and antistatic performance of the sheet 1 can be further improved. In the present invention, acrylic resin syrup refers to a polymerizable liquid mixture obtained by dissolving (meth)acrylate polymers such as polymethyl methacrylate (PMMA) in acrylic monomers such as methyl methacrylate . Among the above-mentioned acrylic resin syrups, those selected from the group consisting of polymethyl methacrylate, methyl methacrylate/methyl acrylate copolymer and methyl methacrylate/n-butyl acrylate copolymer An acrylic resin syrup obtained by dissolving more than one acrylate polymer in methyl methacrylate monomer is preferred.

In addition, other suitable examples of the curable resin constituting the curable resin layer 4 include curable acrylic resin, epoxy resin, or vinyl ester resin, and those containing brominated bisphenol A vinyl ester are more preferable. By using these curable resins, the non-flammability of the sheet 1 can be further improved.

The curable resin layer 4 preferably does not contain thermoplastic resin. In addition, the curable resin layer 4 may further contain additives such as curing accelerators, flame retardants, ultraviolet absorbers, and fillers. In particular, the curable resin layer 4 preferably contains a flame retardant from the viewpoint of further improving the non-flammability of the sheet 1 . Examples of the flame retardant include phosphate-based flame retardants, halogen-containing organic compounds, and inorganic-based flame retardants. Among them, halogen-containing organic compounds are preferable, and bromine-containing organic compounds are more preferable. Bromine-containing organic compounds can be specifically exemplified as hexabromocyclododecane (HBCD), decabromodiphenyl ether (DBDPO), octabromodiphenyl ether, tetrabromobisphenol A (TBBA), bis(tribromophenoxy) Ethane, bis(pentabromophenoxy)ethane (BPBPE), tetrabromobisphenol A epoxy resin (TBBA Epoxy), tetrabromobisphenol A carbonate (TBBA-PC), ethylene (bistetrabromophthalein) Acyl imide (EBTBPI), ethylenyl bis (pentabromodiphenyl), ginseng (tribromophenoxy) trisporine (TTBPTA), bis (dibromopropyl) tetrabromobisphenol A (DBP-TBBA) , bis(dibromopropyl)tetrabromobisphenol S (DBP-TBBS), brominated polyphenylene ether (including poly(di)bromophenylene ether, etc.) (BrPPE), brominated polystyrene (including poly(di) Bromostyrene, polytribromostyrene, cross-linked brominated polystyrene, etc.) (BrPS), brominated cross-linked aromatic polymer, brominated epoxy resin, brominated phenoxy resin, brominated styrene-cis Butenedioic anhydride polymer, tetrabromobisphenol S (TBBS), ginseng (tribromoneopentyl) phosphate (TTBNPP), polybromotrimethylphenyl indanane (PBPI) and ginseng (dibromopropyl) - Trimeric isocyanate (TDBPIC) and the like. Among them, TBBA is preferred.

As an example of the curable resin layer 4 , the concentration of bromine is 5 to 30% by mass. In particular, when the bromine concentration of the curable resin layer 4 is 10 to 20% by mass, it is more suitable for both non-flammability and transparency. In addition, other examples of the curable resin layer 4 include those that do not substantially contain bromine. Here, "substantially not containing bromine" means that the bromine concentration of the curable resin layer 4 is 1% by mass or less. More specifically, the curable resin layer 4 may be one having a bromine concentration of 0.5 mass % or less, one having a bromine concentration of 0.1 mass % or less, or one containing no bromine. In this specification, the bromine concentration of the curable resin layer 4 is a value measured using energy dispersive X-ray analysis (EDS analysis).

In addition, the curable resin layer 4 may be made to include an antistatic agent on the surface of the curable resin layer 4 and/or in the curable resin layer 4 . Antistatic agents may, for example, be surfactants, metals and metal compounds.

Surfactants used as antistatic agents include cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric surfactants. Examples of cationic surfactants include alkylamine salts such as monoalkylamine salts, dialkylamine salts, and trialkylamine salts; alkyltrimethylammonium hydroxide, dialkyldimethylammonium hydroxide, etc. Level 4 ammonium salt, etc. In addition, the cationic surfactant may be a reactive cationic surfactant having a reactive double bond. Furthermore, the cationic surfactant may also be a fluorine-based cationic surfactant having a perfluoroalkyl group in its structure.

Anionic surfactants can be, for example, sulfate ester salts of higher alcohols, higher alkylsulfonic acids and their salts, alkylbenzenesulfonic acids and their salts, polyoxyethylene alkyl sulfates, polyoxyethylene alkylphenyl ester sulfuric acid salt, vinyl sulfosuccinate, polyoxyalkylene alkyl ether sulfate, etc. In addition, the anionic surfactant may be a reactive anionic surfactant having a reactive double bond. Reactive anionic surfactants with reactive double bonds can be, for example, sulfate ester salts of alkyl acrylphenol polyethylene oxide adducts, sulfuric acid of allyl alkylphenol polyethylene oxide adducts Ester salt and sulfate ester salt of allyl dialkylphenol polyethylene oxide adduct, etc. Furthermore, the anionic surfactant may also be a fluorine-based anionic surfactant having a perfluoroalkyl group in its structure.

Non-ionic surfactants can be for example polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyethylene glycol fatty acid ester, ethylene oxide propylene oxide block copolymer, polyoxyethylene fatty acid Amines, ethylene oxide-propylene oxide copolymers, etc., and sorbitan derivatives such as polyoxyethylene sorbitan fatty acid esters, etc. In addition, the nonionic surfactant may be a reactive nonionic surfactant having a reactive double bond. Reactive nonionic surfactants with reactive double bonds can be, for example, alkylacrylphenol polyethylene oxide adducts, allyl alkylphenol polyethylene oxide adducts, and allyl diethylene oxide adducts. Alkylphenol polyethylene oxide adducts, etc. Furthermore, the nonionic surfactant may also be a fluorine-based nonionic surfactant having a perfluoroalkyl group in its structure.

Among surfactants, anionic surfactants are preferable, and polyoxyalkylene alkyl ether sulfates are particularly preferable because they are more suitable for achieving both transparency and antistatic properties.

The metal elements constituting the metal or metal compound used as an antistatic agent can be, for example, Ag, Ni, Cu, Sn, Sb, Al, In, Ti, etc. In addition, it can also be made of a single metal whose standard electrode potential is less than 0eV of metal elements. Examples of metal compounds include metal oxides (antimony pentoxide, tin oxide, zinc oxide, indium oxide, antimony-doped indium oxide, tin-doped indium oxide, silver oxide, etc.) and the like.

As far as the content of the antistatic agent in the curable resin layer 4 is concerned, for example: per 100 parts by mass of the total amount of the curable resin layer 4, the antistatic agent is 1-10 parts by mass, preferably 3-8 parts by mass.

The curable resin layer 4 may contain a polymerization initiator for curing the curable resin. The type of polymerization initiator may be appropriately selected according to the type of curable resin to be used. Examples of photopolymerization initiators include 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl -1-phenyl-propan-1-one, 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy -1-{4-[4-(2-Hydroxy-2-methyl-propionyl)-benzyl]phenyl}-2-methyl-propan-1-one, 2-methyl-1-( 4-methylphenylthio)-2-𠰌linylpropan-1-one, 2-benzyl-2-dimethylamino-1-(4-𠰌linyl)-butanone-1, 2- (Dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-𠰌linyl)phenyl]-1-butanone, 2,4,6, -Trimethylbenzoyl-diphenyl-phosphine oxide and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, etc. Among these photopolymerization initiators, 1-hydroxy-cyclohexyl-phenyl-ketone is preferable from the viewpoint of improving the transparency of the sheet 1 . These photoinitiators may be used alone or in combination of two or more. The content ratio of the polymerization initiator in the curable resin layer 4 can be, for example, 1-5 parts by mass of the polymerization initiator per 100 parts by mass of the total amount of the curable resin layer 4 .

In the present invention, in order to improve the transparency of the sheet 1, the refractive indices of the aforementioned glass fiber cloth 3 and curable resin layer 4 are preferably set to be similar. From this point of view, the refractive index of the curable resin layer 4 is preferably about 1.45 to 1.65, more preferably about 1.50 to 1.60. The refractive index of the curable resin layer 4 is a value measured by "Method B" stipulated in Japanese Industrial Standard JIS K 7142:2008 "Plastic-Refractive Index Calculation Method".

In the sheet 1 of the present invention, the weight per layer of the curable resin layer 4 (mass excluding the glass fiber cloth 3 ) is, for example, 50-100 g/m ² . In the sheet material 1 of the present invention, from the viewpoint of being more suitable for achieving both transparency improvement and low heat generation, the mass of each layer of the curable resin layer 4 (mass except for the glass fiber cloth 3) is preferably 50 or more. ~80g/m ² , preferably 50~70g/m ² .

In addition, the thickness per layer of the curable resin layer 4 (the thickness of the state including the glass fiber cloth 3 ) is, for example, 40 to 100 μm. In the sheet material 1 of the present invention, the thickness of each layer of the curable resin layer 4 (the thickness of the state including the glass fiber cloth 3) can be listed as Such as 40~80μm, more preferably 55~70μm.

The two curable resin layers 4 provided in the sheet 1 of the present invention may have the same composition and thickness, or may have different thicknesses and compositions.

[Sheet Characteristics] When the sheet 1 of the present invention is used as a smoke prevention vertical wall, the sheet 1 should have high transparency in order to prevent the view from being obstructed and the appearance damaged. From the viewpoint of ensuring high transparency, the total light transmittance of the sheet 1 of the present invention can be, for example, 80% or more, preferably 85% or more, more preferably 90% or more. In addition, the haze of the sheet 1 of the present invention can be, for example, 20% or less, preferably 10% or less, more preferably 5% or less, more preferably 2% or less. The total light transmittance of sheet 1 in this specification is a value measured in accordance with Japanese Industrial Standard JIS K 7361-1: 1997 "Plastic-Test method for total light transmittance of transparent materials - Part 1: Single beam method". The haze of the sheet 1 is a value measured in accordance with the Japanese Industrial Standard JIS K7136 2000 "Plastic-Transparent Material Haze Calculation Method".

Sheet 1 of the present invention has excellent tear strength. The tear strength of the sheet 1 of the present invention is, for example, 30N or higher, preferably 40N or higher. Moreover, although the upper limit of the tear strength which the sheet|seat 1 of this invention has is not specifically limited, For example, it is 100N or less, 80N or less, or 60N or less. The tear strength of the sheet 1 of the present invention can specifically be 30-100N, 40-80N, or 40-60N. In this specification, the tear strength of sheet 1 is: using a constant-speed load-type tensile tester, under the conditions of a holding interval of 25mm and a tensile speed of 200mm/min, it is tested in the longitudinal and transverse directions of sheet 1. Tensile test, the average value of "maximum longitudinal load (N)" and "maximum transverse load (N)" measured by this test.

The sheet 1 of the present invention has the property of being non-flammable (hard to generate heat) in case of fire. The index of this characteristic that the sheet 1 of the present invention has can be cited as follows: in the heat generation test of irradiating 50 kW/m ² of radiant heat, the total calorific value 20 minutes after the start of heating is, for example, 8 MJ/m ² or less, and preferably Below 6MJ/m ² , more preferably below 5MJ/m ² . In addition, other indicators of the characteristics of the sheet 1 of the present invention are: in the heat generation test of 50kW/m2 radiant heat, 20 minutes after the start of heating, the heat generation rate does not exceed 200kW/ ^m2 for more than 10 seconds. m ² ; and preferably 20 minutes after the start of heating, the heating rate should not exceed 200kW/m ² for more than 3 seconds; more preferably 20 minutes after the start of heating, the heating rate should not exceed 200kW/m ² for more than 1 second. The total calorific value and the heating rate per unit area in the exothermic test irradiated with radiant heat of 50kW/ ^m2 are in accordance with the "Fire Resistance Test/Evaluation Business Method Book" (2021) of the General Incorporated Building Materials Testing Center (Japan) The value obtained in "4.9.2 Exothermic test" in the version revised on July 1, 2019). In addition, "4.9.2 Exothermic Test" in the "Fire Resistance Test/Evaluation Business Method Book" (version revised on July 1, 2021) and the "Fire Resistance Test/Evaluation Business Method" of the Building Materials Testing Center of the General Incorporated Foundation "4.10.2 Exothermic Test/Evaluation Method" in "Book" (revised version on March 1, 2016) is essentially the same.

The sheet 1 of the present invention preferably has a surface resistivity of 5×10 ¹² Ω or less. By setting such a surface resistivity, it is possible to reduce dust adhesion when constructing a smoke-proof vertical wall. To provide such a surface resistivity, for example, it is sufficient to add an antistatic agent to the curable resin layer 4 . In this specification, the surface resistivity of sheet 1 is measured by the method specified in "5.13.2 Laminates" of "5.13 Resistivity" of Japanese Industrial Standard JIS K 6911 1995 "General Test Methods for Thermosetting Plastics" value.

The mass of the sheet 1 of the present invention is 300~450g/m ² . By satisfying this quality, it is possible to have the property of being non-flammable (hard to generate heat) in case of fire. From the point of view of being more suitable for non-flammability (hard to generate heat) in case of fire, the mass of the sheet 1 of the present invention is preferably 330-430 g/m ² , more preferably 350-430 g/m ² .

The thickness of the sheet 1 of the present invention can be, for example, 200-330 μm, preferably 240-315 μm, more preferably 240-280 μm.

In the sheet 1 of the present invention, the ratio of the thickness of the thermoplastic resin film 2 to the thickness of each layer of the curable resin layer 4 (thickness of the thermoplastic resin film 2/thickness of each layer of the curable resin layer 4) can be, for example, 1.3~2.5, preferably 1.5~2.5, more preferably 1.9~2.2.

[Sheet use] The sheet 1 of the present invention has the characteristics of excellent tear strength, non-deformation and non-combustibility in case of fire, can meet the performance required for a sheet for smoke-proof vertical walls, and is suitable for use as a sheet for smoke-proof vertical walls. In this manual, "smoke-proof vertical wall" refers to a vertical wall that is installed to temporarily block and induce smoke containing carbon monoxide and toxic gases generated during a fire, and is installed on the ceiling of a building, which belongs to smoke exhaust One of the devices. In addition, in this specification, the sheet|seat for smoke prevention vertical walls means the sheet|seat used as a wall member (vertical wall main body) of a smoke prevention vertical wall.

When the sheet 1 of the present invention is used as a sheet for smoke prevention walls, the type of smoke prevention walls to which the sheet for smoke prevention walls is not particularly limited, but can be suitably used as a tension type smoke prevention wall. Sheets for hanging walls. Tension-type smoke-proof wall refers to a wall made of sheets for smoke-proof walls stretched between two pairs of mullions. Smoke-proof vertical wall with window block.

[Manufacturing method of the sheet 1 of the present invention] The manufacturing method of the sheet 1 of the present invention is not particularly limited, and examples thereof include a manufacturing method including steps 1 and 2 below. Step 1: A step of preparing intermediate sheet A, curable resin solution B, glass fiber cloth C, and engineering film D, wherein the intermediate sheet A is a curable resin impregnated in the state of glass fiber cloth. A thermoplastic resin film with a thickness of 90-130 μm is laminated on the resin layer, and curable resin solution B is used to form the curable resin layer. Step 2: Sandwich the intermediate sheet A and the engineering film D so that the surface side of the thermoplastic resin film of the intermediate sheet A is on the side of the glass fiber cloth C and impregnated with the hardening resin The above-mentioned glass fiber cloth C of solution B, and in this state, harden the above-mentioned curable resin solution B, thereby preparing a step of a sheet with a mass of 300~450g/m ² .

Specifically, firstly, one film used as the thermoplastic resin film 2, two glass fiber cloths 3, a curable resin solution for forming the curable resin layer 4, and two engineering films are prepared. Engineered film refers to a film that is temporarily used as a support during manufacture. The engineering film only needs to have the light transmittance for the curable resin solution to be light-cured to form the curable resin layer 4 , for example, a transparent PET film and the like.

Next, the above curable resin solution was applied to one side of one engineering film and one side of the film used as the thermoplastic resin film 2 above. Then, use the engineering film coated with the curable resin solution and the thermoplastic resin film 2 coated with the curable resin solution, so that the surface coated with the curable resin solution is placed on the glass fiber cloth 3 In the side method, one piece of glass fiber cloth 3 is clamped, and then crimped to impregnate the required amount of hardening resin solution from both sides of the glass fiber cloth 3 .

Next, the curable resin solution impregnated with the glass fiber cloth 3 is cured. When the curable resin is a photocurable resin, when the resin solution is cured by imparting light energy, the curable resin solution is irradiated with light to be cured. The light irradiation conditions can be, for example, set such that the cumulative light quantity is about 100 to 500 mJ/cm ² . As described above, an intermediate sheet comprising a layer structure of engineering film/curable resin layer 4 impregnated with glass fiber cloth 3/thermoplastic resin film 2 can be produced. In addition, when the curable resin is a thermosetting resin, it can be cured by applying heat energy instead of light energy, and the heating temperature can be, for example, about 50 to 200°C.

Next, the above curable resin solution was coated on the surface side of the thermoplastic resin film 2 of the obtained intermediate sheet, and one surface side of the other prepared process film. Then, the intermediate sheet coated with the curable resin solution and the engineering film coated with the curable resin solution are arranged so that the surface coated with the curable resin solution faces the glass fiber cloth 3 side, The other piece of glass fiber cloth 3 is sandwiched and crimped to impregnate the required amount of hardening resin solution from both sides of the glass fiber cloth 3 .

Next, the curable resin solution impregnated with the glass fiber cloth 3 is cured. The hardening method is the same as that described above for the production method of the intermediate sheet. Thereby, a sheet material composed of the following layer structure is obtained: engineering film/curable resin layer 4 contained in the state of impregnated glass fiber cloth 3/thermoplastic resin film 2/form of impregnated glass fiber cloth 3 State to contain hardening resin layer 4/engineering film. Then, the engineering films on both surfaces are peeled off to obtain the sheet material 1 of the present invention (that is, a sheet material having the following layer structure: hardening resin layer 4 contained in a state of impregnating glass fiber cloth 3 /Thermoplastic resin film 2/The hardening resin layer 4) contained in the state which impregnated the glass fiber cloth 3. The engineering film can also be made into a covering film, at this time, it can be peeled off after being constructed into a smoke-proof vertical wall.

2. Anti-smoke hanging wall The smoke prevention vertical wall of the present invention includes the aforementioned sheet 1 as a wall member (vertical wall main body). The type of the smoke-proof vertical wall of the present invention is not particularly limited, but a suitable example may be a tension-type smoke-proof vertical wall. Tension-type smoke-proof wall refers to a wall made of sheets for smoke-proof walls stretched between two pairs of mullions. Smoke-proof vertical wall with window block. Example

Examples and comparative examples are shown below to describe the present invention in detail. However, the present invention is not limited by the Examples.

1. Measurement and evaluation method 1-1. Average single fiber diameter (μm) and number of single fibers (root) of glass yarn Prepare 2 pieces of glass fiber cloth that have been cut into a square with a side length of 30cm, one of which is used for observing the warp yarn, and the other is used for observing the weft yarn, and they are respectively embedded in epoxy resin (trade name "3091", Marumoto Struers Co., Ltd. Ltd.) and harden. Next, grind the glass cloth embedded in epoxy resin to the extent that the cross-section of the single fiber constituting the warp or weft can be observed, and use a scanning electron microscope (SEM) (trade name "JSM-6390A", manufactured by Japan Electronics Co., Ltd. ) and observed at a magnification of 500 times to measure the average diameter (μm) and the number of single fibers (roots) of the glass yarn. (1) Average single fiber diameter of glass long fiber (μm) Randomly select 20 warp and weft yarns respectively, observe the cross-sections of all the single fibers contained in the 20 glass yarns, measure the diameter and calculate the average value, and make it the average diameter of the single fibers of the warp and weft yarns. (2) Number of single fibers (roots) Randomly select 20 warp yarns and weft yarns respectively, measure the total number of single fibers contained in each of the 20 glass yarns and calculate the average value, and let it be the number of single fibers of warp yarns and weft yarns.

1-2. Count of glass yarn The count of the glass yarn is measured according to the method stipulated in "7.1 Count" of the Japanese Industrial Standard JIS R 3420 2013 "General Test Methods for Glass Fibers". Specifically, first, 500 m of glass yarn was taken from the winding device, and it was made into a test piece. Place the test piece flat in a muffle furnace, bake it at 625° C. for 25 minutes, let it cool in a desiccator, and measure the mass of the test piece. Calculate the count according to the formula. [mathematical formula 2] t=(m/500)×1000 t: Count m: Test piece mass (g)

1-3. Weaving density of glass fiber cloth 3 (root/25mm) The weaving density of the glass fiber cloth 3 is based on the method stipulated in "7.9 Density (weaving density)" of the Japanese Industrial Standard JIS R 3420: 2013 "General Test Methods for Glass Fibers", and the weaving density of the warp and weft yarns is measured. Specifically, the glass fiber cloth 3 is measured at a position more than 50 mm from the cloth width and the edge of the cloth, and the measurement interval is set at 10 mm to 200 mm, and the number of all yarns within the set measurement interval is measured. Let this be one measurement, move to another position that does not contain the previously measured yarn, and then measure the number of all yarns in the measurement interval twice in the same way. For each of the three measurements, calculate the number of yarns per 25mm according to the formula, and calculate the average value of the three measurements. [mathematical formula 3] Mi=(ni/ai)×25 Mi: the number of yarns per 25mm ni: the number of yarns to be measured ai: measured correct distance (mm)

1-4. Thickness of glass fiber cloth 3 (μm) The thickness of the glass fiber cloth 3 is measured according to the method A stipulated in "7.10.1 Fabric Thickness" of the Japanese Industrial Standard JIS R3420:2013 "General Test Methods for Glass Fiber". Specifically, use a micrometer to make the rotating shaft rotate peacefully and make light contact with the measuring surface parallel to it, and read the scale after the ratchet makes three sounds, thereby measuring the thickness of the glass fiber cloth 3 . In addition, the thickness of the glass fiber cloth 3 is measured at the intersection of warp and weft.

1-5. Refractive index of glass fiber cloth 3 and curable resin layer 4 The refractive index of the glass fiber cloth 3 and the curable resin layer 4 is measured according to the "B method" stipulated in the Japanese Industrial Standard JIS K 7142:2008 "Plastic-Refractive Index Calculation Method". Specifically, first, the glass fibers constituting the glass fiber cloth 3 and the curable resin layer 4 were pulverized to such an extent that Baker's lines could be observed when observed with an optical microscope at a magnification of 400 times, and this was used as a measurement sample. In addition, several kinds of immersion solutions with different refractive indices of 0.002 were prepared. Put a small amount of immersion solution on the slide glass, and then put several measurement samples on the immersion solution on the slide glass, and then put the cover glass on it. Next, use an interference filter for sodium D line on a halogen lamp as a light source, use an optical microscope, focus on the measurement sample at a magnification of 400 times, and then zoom out the distance between the stage of the microscope and the objective lens , move the focus slightly away. Using this operation, when the refractive index of the measured sample is inconsistent with that of the immersion liquid, the Baker's line (that is, the bright halo visible around or inside the powder) will move toward the one with the larger refractive index. When the refractive index of the liquid is the same, there will be no Baker's line. Repeat the measurement until the refractive index of the measured sample is the same as that of the immersion liquid, or until the refractive index of the measured sample falls between two close refractive indices in the entire series of immersion liquids, so as to measure the refractive index. The measurement of the refractive index is carried out 3 times at a temperature of 23°C, and the average value of the 3 measurements is the value of the refractive index.

1-6. Mass of glass fiber cloth 3 (g/m ² ) The mass of glass fiber cloth 3 is based on Japanese Industrial Standard JIS R 3420: 2013 "General Test Methods for Glass Fiber""7.2 Mass of cloth and mat (mass) "Determined by the method specified. Specifically, take a square test piece with an area of 100cm2 from a position more ^than 50mm away from the end of the glass fiber cloth 3, dry the test piece at 105°C for 1 hour, measure the mass of the test piece, and calculate it according to the following formula The mass per 1m ² . [Mathematical formula 4] ρA=(ms/100)×10 ⁴ ρA: mass per 1 m ² (g/m ² ) ms: mass of test piece (g)

1-7. Bromine concentration (mass %) in thermoplastic resin film 2 and curable resin layer 4 The bromine concentration in the thermoplastic resin film 2 and curable resin layer 4 was measured by energy dispersive X-ray analysis (EDS analysis). Specifically, the sheet 1 was cut out to have a length of 1 cm×a width of 1 cm, and this was used as a measurement sample. Set the cut surface of the measurement sample (the cut surface in the thickness direction of the sheet 1) as the measurement surface, set the length direction of the measurement sample as the depth direction during measurement, and set the center of the thermoplastic resin film 2 on the cut surface of the measurement sample Nearby is a measurement point, and the concentration of bromine in the thermoplastic resin film 2 was measured using a scanning electron microscope (trade name "JSM-6390A", manufactured by JEOL Ltd.) equipped with an EDS analyzer. In addition, using the same method, the concentration of bromine in the curable resin layer 4 was measured using a scanning electron microscope equipped with an EDS analyzer with the vicinity of the center of the curable resin layer 4 on the cut surface of the measurement sample as the measuring point.

1-8. Total light transmittance (%) and haze (%) The total light transmittance of sheet 1 is measured in accordance with Japanese Industrial Standard JIS K 7361-1:1997 "Plastic-Test method for total light transmittance of transparent materials - Part 1: Single beam method". The haze of the sheet 1 was measured in accordance with Japanese Industrial Standard JIS K 7136:2000 "Plastic-Transparent Materials Haze Calculation Method". The total light transmittance of the thermoplastic resin film layer 2 is a value measured in accordance with Japanese Industrial Standard JIS K7361-1 1997 "Plastic-Transparent Materials - Test Method for Total Light Transmittance-Part 1: Single Beam Method". In addition, the haze of the thermoplastic resin film layer 2 shows the value measured according to the Japanese Industrial Standard JIS K7136 2000 "Plastic-Transparent Material Haze Calculation Method".

1-9. Surface resistivity (Ω) The surface resistivity of sheet 1 is measured according to the method specified in "5.13.2 Laminates" of "5.13 Resistivity" of Japanese Industrial Standard JIS K 6911 1995 "General Test Methods for Thermosetting Plastics". Specifically, a length and a width of 100 mm were cut out from the sheet 1 according to the original thickness, and it was made a test piece. The test piece was left to stand for more than 24 hours in an air environment with a temperature of 20±2°C and a humidity of 65±5% for pretreatment. The measurement device used a high resistance meter 4339B manufactured by Agilent Technologies Co., Ltd., and the test piece was pressed against the electrode, and the resistance value after charging for 1 minute was measured at an applied voltage of 100V to obtain the surface resistivity.

1-10. Tear strength (N) The tear strength of sheet 1 was measured using a constant-speed load-type tensile tester under the conditions of a holding interval of 25 mm and a tensile speed of 200 mm/min. Specifically, a test piece of 75mm×150mm was taken from the sheet 1 along the vertical and horizontal directions, and as shown in Figure 2, an isosceles trapezoidal mark with a short side of 25mm, a long side of 100mm, and a height of 75mm was marked on the test piece. Anti-slip adhesive tape (trade name "600S", Sekisui Chemical Co., Ltd. system). In addition, the test piece was not scratched. Using a constant speed load type tensile testing machine (trade name "RTC-1310A", manufactured by ORIENTEC CO., LTD.), set the holding interval of the test piece to 25mm, and pull the short end side of the isosceles trapezoid of the test piece, Slow down the long side of the isosceles trapezoid and clamp it with a clip, perform a tensile test at a tensile speed of 200mm/min, and measure the maximum load displayed when tearing. Measure the maximum longitudinal load and the maximum transverse load respectively, and obtain the average value of the maximum longitudinal load and the maximum transverse load (=(maximum longitudinal load (N)+maximum transverse load (N))/2) and use it as the tear strength (N) . In this measurement condition, when the tear strength is 30N or more, it is regarded as having excellent tear strength and judged to be acceptable.

1-11. The total heat generation (MJ/m ² ) of the heat generation test and the duration (seconds) when the heat generation rate per unit area exceeds 200kW/m ² are in accordance with the "Fire Resistance Test/Evaluation" of the Building Materials Testing Center of the General Foundation "4.9.2 Exothermic Test" of "Business Method Book" (version revised on July 1, 2021), to measure the total calorific value of sheet 1 in the exothermic test of irradiating 50kW/ ^m2 radiant heat, and the value per unit area The heating rate exceeds 200kW/m ² for a duration. The specific method is as follows.

[Test body] (1) Let the number of test bodies (sheet 1) be three. (2) Let the shape and size of the test body be a square with each side measuring 99mm±1mm. (3) Before the test, maintain the test body at a temperature of 23°C ± 2°C and a relative humidity of 50% ± 5% to make it reach a certain quality. [Test Apparatus] (1) A schematic diagram of the test apparatus used is shown in FIG. 3 . The test device is composed of the following: a conical radiant heater, a spark plug, a radiant heat shield, a test body frame, a gas sampling device, an exhaust system capable of measuring gas flow, and a heat flow meter. (2) Let the radiant electric heater irradiate the surface of the test body with 50kW/m ² radiant heat evenly and stably. (3) The radiant heat shielding plate can protect the test object from radiant heat before the test starts. (4) The schematic diagram of the test frame and fixed frame included in the test device is shown in Figure 4. Let the test body frame be as follows: in terms of external dimensions, each side is 106mm±1mm square, in terms of external dimensions, the depth is 25mm±1mm, the thickness is 2.4mm±0.15mm, and it is made of stainless steel. Let the fixed frame be as follows: the internal dimension is a square of 111mm±1mm per side, the external dimension is 54mm±1mm in height, 1.9mm±0.1mm in thickness, and the upper part is provided with a square opening of 94.0mm±0.5mm in each side And it is made of stainless steel. (5) The exhaust system shall be equipped with: a centrifugal exhaust fan that can effectively function at the test temperature, an exhaust hood, suction and exhaust ducts for the fan, orifice plate flowmeters, etc. The distance between the lower end of the exhaust hood and the surface of the test body is 210mm±50mm, and the flow rate (converted into standard temperature and standard pressure) of the exhaust device of the exhaust system in this state is above 0.024m ³ /s. In order to measure the exhaust gas flow rate, an orifice plate with an inner diameter of 57mm±3mm and a thickness of 1.6mm±0.3mm is installed in the exhaust flue at a downstream position more than 350mm±15mm away from the fan. For the purpose of collecting exhaust gas, install 12 annular samplers with holes with a diameter of 2.2mm±0.1mm at a distance of 685mm±15mm from the exhaust hood, and make the holes face the direction opposite to the airflow. In addition, measure the temperature of the exhaust gas at the center of the exhaust duct at an upstream position 100mm±5mm from the orifice plate. (6) The gas sampling device can continuously and accurately measure the concentration of oxygen, carbon monoxide, and carbon dioxide in the exhaust gas. (7) The spark plug can be powered from a 10kV transformer or an induction coil system. The electrode spacing of the spark plug is 3mm±0.5mm, and the electrode position is in principle 13mm±2mm on the central axis of the test body. (8) The heat flow meter uses a Schmidt Boelter type that can measure to 100kW/m ² ±10kW/m ² . Let the thermal sensing part of the heat flow meter be a circle with a diameter of 12.5mm and a surface emissivity of 0.95±0.05.

[Test Conditions] (1) The test time was set to be 20 minutes from the time when the spark discharge was activated while radiant heat was irradiated to the surface of the test body. (2) Make the test body as follows: Wrap the side and back with aluminum foil with a thickness of 0.025 mm or more and 0.04 mm or less, put it into a fixed frame, and further fill the back side with inorganic fibers (nominal density 64~128kg/m ³ ) , pushed into the test body frame. (3) During the test, 50 kW/m ² of radiant heat was irradiated from the radiant electric heater to the surface of the test object. (4) Adjust the discharge gas flow rate to 0.024m ³ /s. (5) Until the start of the test, the test body is protected from radiant heat with a radiant heat shielding plate. (6) Before moving the radiant heat shield, set the spark plug at the predetermined position.

於此，t：時間(s) 𝛥 h _c ：淨燃燒熱(kJ/g) 𝑟 ₀：化學計量上之氧/燃料之質量比 (但 △h _c /𝑟 ₀0視為每單位氧消費量之發熱量，令為13.1×10 ³kJ/kg) C：孔口係數(m ^1/2g ^1/2K ^1/2) 𝑇 _𝑒：排氣導管內氣體之絕對溫度(K) 𝛥𝑝：孔口板流量計之壓差(Pa) X ⁰ _O2 ：氧分析計指示值之初期值(莫耳分率) X _O2 ：氧分析計指示值(莫耳分率)

孔口係數𝐶係按下式而從下述數值算出者，即：在所規定之排放氣體流量下，使相當於 q _b =5kW±0.5kW之流量的甲烷燃燒時之酸素分析計指示值𝑋 _{𝑂 2}；排氣導管內氣體之絕對溫度𝑇 _𝑒；及，孔口板流量計之壓差𝛥。 於此， q _b ：所供給之甲烷之發熱速度(kW) 𝛥ℎ _𝑐/𝑟 ₀：每質量單位之已消費氧氣之燃燒熱(kJ/kg)(甲烷時為12.54×10 ³kJ/kg) 酸素分析計指示值𝑋 _{𝑂 2}(𝑡)係按下式算出。

於此，𝑋 ¹ _𝑂2：氧分析計之延遲時間修正前之指示值(莫耳分率) 𝑡 _𝑑：氧分析計之延遲時間(s) 每單位

面積之發熱速度𝑞̇ _𝐴(𝑡)係按下式算出。 於此，As：試驗體初期之暴露面積(0.0088m ²) [Measurement] (1) The oxygen concentration is measured at intervals within 5 seconds. (2) Calculate the heat generation rate per unit area (kW/m ² ) by the following method, and find the duration of the state where the heat generation rate per unit area exceeds 200kW/m ² as "the heat generation rate per unit area exceeds 200kW/m ² duration". Further, the heat generation rate per unit area is trapezoidally integrated with time to calculate the total heat generation per unit area (MJ/m ² ). Here, the trapezoidal integration is carried out by taking the test time as the integration interval and dividing the integration interval into equal parts at measurement intervals, setting the negative heating rate to 0, and only integrating the positive heating rate. [Mathematical formula 5] The heating rate (q) was calculated by the following formula.

Here, t: time (s) 𝛥 h _c : net heat of combustion (kJ/g) 𝑟 ₀ : mass ratio of oxygen/fuel in stoichiometry (but △h _c /𝑟 ₀ 0 is regarded as oxygen consumption per unit The calorific value is 13.1×10 ³ kJ/kg) C : Orifice coefficient (m ^1/2 g ^1/2 K ^1/2 ) 𝑇 _𝑒 : Absolute temperature of the gas in the exhaust duct (K) 𝛥𝑝: Hole Pressure difference (Pa) of the mouth plate flowmeter (Pa) X ⁰ _O2 : initial value of oxygen analyzer indication value (mol fraction) X _O2 : oxygen analyzer indication value (mol fraction)

The orifice coefficient 𝐶 is calculated from the following value according to the following formula, that is, the indicated value 𝑋 of the acid analyzer when the methane corresponding to the flow rate of q _b = 5kW±0.5kW is combusted under the specified exhaust gas flow rate _{𝑂 2} ; the absolute temperature of the gas in the exhaust duct 𝑇 _𝑒 ; and, the pressure difference of the orifice plate flowmeter 𝛥. Here, q _b : heating rate of methane supplied (kW) 𝛥ℎ _𝑐 /𝑟 ₀ : heat of combustion per mass unit of consumed oxygen (kJ/kg) (12.54×10 ³ kJ/kg for methane) The indicated value of the analyzer 𝑋 _{𝑂 2} (𝑡) is calculated according to the following formula.

Here, 𝑋 ¹ _𝑂2 : Indicated value (mol fraction) before the delay time correction of the oxygen analyzer 𝑡 _𝑑 : Delay time of the oxygen analyzer (s) per unit

The area heating rate 𝑞̇ _𝐴 (𝑡) is calculated by the following formula. Here, As: the initial exposure area of the test body (0.0088m ² )

1-12. Degree of non-deformability in the event of fire. The sheet 1 was subjected to the aforementioned "1-11. The total heat generation (MJ/m ² ) of the heat generation test and the duration of the heat generation rate per unit area exceeding 200kW/m ² (seconds) )" column, observe the state of the test object after irradiating radiant heat for 20 minutes, and evaluate the "difficulty of deformation in case of fire" according to the following criteria. <Evaluation criteria for resistance to deformation in case of fire> A: After 20 minutes of radiant heat irradiation, the deformation of the test body is suppressed, and the test body is stored in a fixed frame. B: The test body was deformed after being irradiated with radiant heat for 20 minutes, and the test body was not housed in the fixed frame.

2. Example 1 of sheet production (preparation of thermoplastic resin film layer 2) Prepare a biaxially stretched polyester film (trade name "COSMOSHINE (registered trademark) A4300", manufactured by Toyobo Co., Ltd.; thickness 125 μm, mass 170 g/m ² , total light transmittance (JIS K7361-1 1997) 93%, haze (JIS K7136 2000) 0.9%) as thermoplastic resin film layer 2.

(Preparation of glass fiber cloth 3) Use glass yarn (trade name "ECD900 1/0 1.0Z", manufactured by Unitika Glass Fiber Co., Ltd.) for warp and weft; average single fiber diameter 5 μm, number of single fibers 100, twist number 1.0Z, count 5.6tex), weaving with an air-jet loom to obtain a flat-woven glass fiber fabric with a warp density of 69/25mm and a weft density of 69/25mm. Next, it was heated at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. After that, adjust the concentration of silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride), CHISSO CORPORATION) to 15g/L The surface treatment agent treats the glass fiber fabric, presses it with a dyeing roller, and then dries it at 120°C for 1 minute to solidify. Then, it was processed with a water flow at a pressure of 1.5 MPa, so that the warp tension of the glass fiber fabric was 100 N/m, and at the same time, a stretching treatment was performed to obtain a glass fiber cloth 3 (glass fiber fabric). The obtained glass fiber cloth 3 had a warp density of 69 threads/25 mm, a weft thread density of 69 threads/25 mm, a thickness of 30 μm, a mass of 31 g/m ² , and a refractive index of 1.562. Prepare 2 pieces of this glass fiber cloth 3 . In addition, the average single fiber diameter and the number of single fibers of the glass yarn were measured using the glass fiber cloth 3 .

(Prepare the hardening resin solution for forming the hardening resin layer 4) As the curable resin solution for forming the curable resin layer 4, bisphenol A vinyl ester resin (trade name "Neopol 8114", manufactured by Japan U-Pica Company Ltd.), brominated bisphenol A vinyl ester (trade name "Neopol 8197"), NPGDA (neopentyl glycol diacrylate, molecular weight 212, manufactured by Japan U-Pica Company Ltd.), photopolymerization initiator (trade name "Omnirad 184", manufactured by IGM Corporation), and An antistatic agent (polyoxyalkylene alkyl ether sulfate; trade name "Electrostripper ME-2", manufactured by Kao Co., Ltd.) was mixed in the mass ratio shown in Table 1 to prepare a curable resin solution.

(preparation of engineering film) A PET film (thickness 50 μm, total light transmittance (JIS K7361-1 1997) 93%, haze (JIS K7136 2000) 4%) was prepared as an engineering film. Prepare 2 sheets of this engineering film.

(Preparation of intermediate sheet) An intermediate sheet was prepared using one sheet of the aforementioned process film, one sheet of the aforementioned thermoplastic resin film 2 , and one sheet of the aforementioned glass fiber cloth 3 . Specifically, first, the above-mentioned curable resin solution is applied to one surface side of the process film and one surface side of the above-mentioned thermoplastic resin film 2 . Then, the engineering film coated with the curable resin solution and the thermoplastic resin film 2 coated with the curable resin solution are arranged so that the surface coated with the curable resin solution faces the glass fiber cloth 3 side, Clamp the above-mentioned glass fiber cloth 3, and then use a roller to press until the quality of the curable resin layer 4 meets the value listed in Table 1, and impregnate the curable resin solution from both sides of the glass fiber cloth 3. Thereafter, in the state where the thermoplastic resin film 2 and the process film are laminated, the curable resin solution is irradiated with a black light fluorescent lamp (trade name "FL15BLB", manufactured by Toshiba Corporation) for light irradiation (light irradiation conditions: cumulative light intensity 200mJ/cm ² ), harden the curable resin solution to form the curable resin layer 4, and obtain an intermediate sheet composed of the following layer structure: In the state of impregnating the engineering film/glass fiber cloth 3 Curable resin layer 4/thermoplastic resin film 2.

(Manufacture of Sheet) A sheet was prepared using one sheet of the above-mentioned intermediate sheet, one sheet of the above-mentioned process film, and one sheet of the above-mentioned glass fiber cloth 3 . Specifically, first, a curable resin solution is applied to the surface side of the thermoplastic resin film 2 of the intermediate sheet and one surface side of the process film. Then, the intermediate sheet coated with the curable resin solution and the engineering film coated with the curable resin solution are arranged so that the surface coated with the curable resin solution is on the side of the glass fiber cloth 3. Clamp the glass fiber cloth 3 and press it with a roller until the quality of the hardening resin layer 4 meets the values listed in Table 1, and impregnate the hardening resin solution from both sides of the glass fiber cloth 3 . Thereafter, in the state where the thermoplastic resin film 2 and the process film are laminated, the curable resin solution is irradiated with a black light fluorescent lamp (trade name "FL15BLB", manufactured by Toshiba Corporation) for light irradiation (light irradiation conditions: cumulative light intensity 200mJ/cm ² ), harden the hardening resin solution to form the hardening resin layer 4, and obtain a sheet composed of the following layer structure: engineering film/hardening contained in the state impregnated with glass fiber cloth 3 Curable resin layer 4/thermoplastic resin film 2/curable resin layer 4/engineering film impregnated with glass fiber cloth 3. Then, the two engineering films disposed on both surfaces of the sheet are peeled off to obtain the layer structure shown in FIG. A plastic resin film 2/a layered structure consisting of a curable resin layer 4 impregnated with a glass fiber cloth 3 ) sheet. In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

Example 2 (Prepare thermoplastic resin film layer 2) In the same manner as in Example 1, a thermoplastic resin film layer 2 was prepared.

(Prepare glass fiber cloth 3) Use glass yarn (trade name "ECD450 1/0 1.0Z", manufactured by Unitika Glass Fiber Co., Ltd.) for warp and weft; average single fiber diameter 5 μm, number of single fibers 200, twist 1.0Z, count 11.2tex), weaving with an air-jet loom to obtain a flat-woven glass fiber fabric with a warp density of 53/25mm and a weft density of 53/25mm. Next, it was heated at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. After that, adjust the concentration of silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride), CHISSO CORPORATION) to 15g/L The surface treatment agent treats the glass fiber fabric, presses it with a dyeing roller, and then dries it at 120°C for 1 minute to solidify. Then, it was processed with a water flow at a pressure of 1.5 MPa, so that the warp tension of the glass fiber fabric was 100 N/m, and at the same time, a stretching treatment was performed to obtain a glass fiber cloth 3 (glass fiber fabric). The obtained glass fiber cloth 3 had a warp density of 53 threads/25 mm, a weft thread density of 53 threads/25 mm, a thickness of 43 μm, a mass of 48 g/m ² , and a refractive index of 1.562. Prepare 2 pieces of this glass fiber cloth 3 . In addition, the average single fiber diameter and the number of single fibers of the glass yarn were measured using the glass fiber cloth 3 .

(Prepare the hardening resin solution for forming the hardening resin layer 4) In the same manner as in Example 1, a curable resin solution was prepared.

(preparation of engineering film) Same as Example 1, prepare 2 engineering films.

(Prepare the intermediate sheet) Using 1 piece of the above-mentioned engineering film, 1 piece of the above-mentioned thermoplastic resin film 2 and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, an intermediate sheet made of the following layer structure was obtained: engineering film /The hardening resin layer 4/thermoplastic resin film 2 contained in the state impregnated with the glass fiber cloth 3.

(manufacturing sheet) Using 1 piece of the above-mentioned intermediate sheet, 1 piece of the above-mentioned engineering film and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, a layer structure with the layer structure shown in Figure 1 (that is, impregnated with glass A layered structure consisting of curable resin layer 4 contained in the state of fiber cloth 3/thermoplastic resin film 2/curable resin layer 4 contained in the state of impregnating glass fiber cloth 3). In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

Example 3 (Prepare thermoplastic resin film layer 2) In the same manner as in Example 1, a thermoplastic resin film layer 2 was prepared.

(prepare glass fiber cloth 3) In the same manner as in Example 1, two glass fiber cloths 3 were prepared.

(Prepare the hardening resin solution for forming the hardening resin layer 4) For forming the curable resin layer 4, acrylic resin paste (trade name "Acrysirup XD-8005", manufactured by Ryoko Co., Ltd.; refractive index 1.550), acrylic resin paste (trade name "Acrysirup XD-8006" , manufactured by Ryoko Co., Ltd.; refractive index 1.570), photopolymerization initiator (trade name "Omnirad 184", manufactured by IGM Corporation) and antistatic agent (trade name "Electrostripper ME-2", manufactured by Kao Corporation), Mix to the mass ratio listed in Table 1 to prepare a curable resin solution.

(preparation of engineering film) Same as Example 1, prepare 2 engineering films.

(Prepare the intermediate sheet) Using 1 piece of the above-mentioned engineering film, 1 piece of the above-mentioned thermoplastic resin film 2 and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, an intermediate sheet made of the following layer structure was obtained: engineering film /The hardening resin layer 4/thermoplastic resin film 2 contained in the state impregnated with the glass fiber cloth 3.

(manufacturing sheet) Using 1 piece of the above-mentioned intermediate sheet, 1 piece of the above-mentioned engineering film and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, a layer structure with the layer structure shown in Figure 1 (that is, impregnated with glass A layered structure consisting of curable resin layer 4 contained in the state of fiber cloth 3/thermoplastic resin film 2/curable resin layer 4 contained in the state of impregnating glass fiber cloth 3). In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

Example 4 (Preparation of thermoplastic resin film layer 2) Prepare a biaxially stretched polyester film (trade name "COSMOSHINE (registered trademark) A4300", manufactured by Toyobo Co., Ltd.; thickness 100 μm, mass 14 g/m ² , total light transmittance (JIS K7361-1 1997) 93%, haze (JIS K7136 2000) 0.9%) as the thermoplastic resin film layer 2 .

(prepare glass fiber cloth 3) In the same manner as in Example 1, two glass fiber cloths 3 were prepared.

(Prepare the hardening resin solution for forming the hardening resin layer 4) In the same manner as in Example 1, a curable resin solution was prepared.

(preparation of engineering film) Same as Example 1, prepare 2 engineering films.

(Prepare the intermediate sheet) Using 1 piece of the above-mentioned engineering film, 1 piece of the above-mentioned thermoplastic resin film 2 and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, an intermediate sheet made of the following layer structure was obtained: engineering film /The hardening resin layer 4/thermoplastic resin film 2 contained in the state impregnated with the glass fiber cloth 3.

(manufacturing sheet) Using 1 piece of the above-mentioned intermediate sheet, 1 piece of the above-mentioned engineering film and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, a layer structure with the layer structure shown in Figure 1 (that is, impregnated with glass A layered structure consisting of curable resin layer 4 contained in the state of fiber cloth 3/thermoplastic resin film 2/curable resin layer 4 contained in the state of impregnating glass fiber cloth 3). In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

Comparative example 1 (preparation of thermoplastic resin film layer 2) Prepare a biaxially stretched polyester film (trade name "COSMOSHINE (registered trademark) A4300", manufactured by Toyobo Co., Ltd.; thickness 75 μm, mass 105 g/m ² , total light transmittance (JIS K 7105: 1981) 93%, haze (JIS K 7105: 1981) 0.9%) was used as the thermoplastic resin film layer 2 .

(prepare glass fiber cloth 3) In the same manner as in Example 1, two glass fiber cloths 3 were prepared.

(Prepare the hardening resin solution for forming the hardening resin layer 4) In the same manner as in Example 1, a curable resin solution was prepared.

(preparation of engineering film) Same as Example 1, prepare 2 engineering films.

(Prepare the intermediate sheet) Using 1 piece of the above-mentioned engineering film, 1 piece of the above-mentioned thermoplastic resin film 2 and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, an intermediate sheet made of the following layer structure was obtained: engineering film /The hardening resin layer 4/thermoplastic resin film 2 contained in the state impregnated with the glass fiber cloth 3.

(manufacturing sheet) Using 1 piece of the above-mentioned intermediate sheet, 1 piece of the above-mentioned engineering film and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, a layer structure with the layer structure shown in Figure 1 (that is, impregnated with glass A layered structure consisting of curable resin layer 4 contained in the state of fiber cloth 3/thermoplastic resin film 2/curable resin layer 4 contained in the state of impregnating glass fiber cloth 3). In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

Comparative Example 2 (preparation of thermoplastic resin film layer 2) Prepare a biaxially stretched polyester film (trade name "COSMOSHINE (registered trademark) A4300", manufactured by Toyobo Co., Ltd.; thickness 188 μm, mass 263 g/m ² , total light transmittance (JIS K7361-1 1997) 93%, haze (JIS K7136 2000) 0.9%) as the thermoplastic resin film layer 2 .

(prepare glass fiber cloth 3) Glass yarn (trade name "ECBC2250 1/0 1.0Z", manufactured by Unitika Glass Fiber Co., Ltd.; average single fiber diameter 4 μm, number of single fibers 66, twist number 1.0Z, count 2.3 tex) is used for warp and weft ), weaving with an air-jet loom to obtain a flat-woven glass fiber fabric with a warp density of 95/25mm and a weft density of 95/25mm. Next, it was heated at 400° C. for 30 hours to remove the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric. After that, adjust the concentration of silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride), CHISSO CORPORATION) to 15g/L The surface treatment agent treats the glass fiber fabric, presses it with a dyeing roller, and then dries it at 120°C for 1 minute to solidify. Then, it was processed with a water flow at a pressure of 1.5 MPa, so that the warp tension of the glass fiber fabric was 100 N/m, and at the same time, a stretching treatment was performed to obtain a glass fiber cloth 3 (glass fiber fabric). The warp yarn density of the obtained glass fiber cloth 3 is 95 yarns/25mm, the weft yarn density is 95 yarns/25mm, the thickness is 15 μm, the mass is 17g/m2, and the refractive index is 1.562. Prepare 2 pieces of this glass fiber cloth 3 . In addition, the average single fiber diameter and the number of single fibers of the glass yarn were measured using the glass fiber cloth 3 .

(Prepare the hardening resin solution for forming the hardening resin layer 4) In the same manner as in Example 1, a curable resin solution was prepared.

(preparation of engineering film) Same as Example 1, prepare 2 engineering films.

(Prepare the intermediate sheet) Using 1 piece of the above-mentioned engineering film, 1 piece of the above-mentioned thermoplastic resin film 2 and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, an intermediate sheet made of the following layer structure was obtained: engineering film /The hardening resin layer 4/thermoplastic resin film 2 contained in the state impregnated with the glass fiber cloth 3.

(manufacturing sheet) Using 1 piece of the above-mentioned intermediate sheet, 1 piece of the above-mentioned engineering film and 1 piece of the above-mentioned glass fiber cloth 3, using the same method as in Example 1, a layer structure with the layer structure shown in Figure 1 (that is, impregnated with glass A layered structure consisting of curable resin layer 4 contained in the state of fiber cloth 3/thermoplastic resin film 2/curable resin layer 4 contained in the state of impregnating glass fiber cloth 3). In the obtained sheet, the gap between the glass fibers of the glass fiber cloth 3 is impregnated with a curable resin layer 4 (cured product of the resin composition), and the curable resin layer 4 is formed on both sides of the layer of the glass fiber cloth 3 .

3. Results Table 1 shows the results. The sheets of Examples 1 to 4 are sheets in which curable resin layers 4 are laminated on both sides of the thermoplastic resin film 2 in a state impregnated with glass fiber cloth, and the thickness of the aforementioned thermoplastic resin film 2 is 90 ~130μm, and the quality of the aforementioned sheets satisfies 300~450g/m ² , which have excellent tear strength, are not easily deformed and are not flammable in a fire. In particular, since the thickness of the thermoplastic resin film of the sheets of Examples 1 to 3 is 120 to 130 μm, the tear strength is particularly excellent, and it is not easily deformed in a fire. As mentioned above, the sheets of Examples 1 to 4 fully satisfy the performance required for the sheet for smoke-proof vertical wall, and are suitable for use as the sheet for smoke-proof vertical wall.

On the other hand, the sheet of Comparative Example 1 had poor tear strength because the thickness of the thermoplastic resin film 2 was less than 90 μm.

In addition, in the sheet of Comparative Example 2, since the thickness of the thermoplastic resin film 2 exceeds 130 μm, the degree of heat shrinkage of the thermoplastic resin film 2 increases, and the entire sheet is deformed, which is easily deformed and flammable in a fire.

[Table 1]

1: sheet 2: Thermoplastic resin film 3: Glass fiber cloth 4: Hardening resin layer 41: One surface side part 42: another surface side part

Fig. 1 is a schematic cross-sectional view showing an example of the sheet of the present invention. Fig. 2 is a schematic plan view illustrating the tear strength measuring method of the present invention. Fig. 3 is a diagram showing the outline of the test device, which is carried out in "4.9.2 Heat generation" in the "Fire Resistance Performance Test/Evaluation Business Method Book" (revised on July 1, 2021) of the General Incorporated Foundation Building Materials Test Center Sex test" is used. Figure 4 is a schematic diagram of the test frame and fixed frame included in the test device, which is carried out in the "Fire Resistance Performance Test/Evaluation Business Method Book" (revised on July 1, 2021) of the Building Materials Test Center of the General Incorporated Foundation It is used in "4.9.2 Exothermic Test". The unit of the values (dimensions) shown in Fig. 4 is mm.

1: sheet

2: Thermoplastic resin film

3: Glass fiber cloth

4: Hardening resin layer

41: One surface side part

42: another surface side part

Claims (14)

A sheet comprising: a thermoplastic resin film; and curable resin layers laminated on both sides of the thermoplastic resin film and impregnated with glass fiber cloth; and the thermoplastic resin film The thickness is 90~130μm, and the mass of the aforementioned sheet is 300~450g/m ² . The sheet according to claim 1, wherein the thickness of the aforementioned thermoplastic resin film is 120-130 μm, and the mass of the aforementioned sheet is 350-430 g/m ² . The sheet according to claim 1 or 2, wherein the resin forming the curable resin layer is a photocurable resin. The sheet according to claim 1 or 2, wherein the thermoplastic resin is polyethylene terephthalate. The sheet according to claim 1 or 2, wherein the bromine concentration of the curable resin layer is 5 to 30% by mass. The sheet according to claim 1 or 2, wherein the total light transmittance is above 80%, and the haze is below 20%. The sheet according to claim 1 or 2 has a tear strength of 30N or more. The sheet according to claim 1 or 2 has a surface resistivity of 5×10 ¹² Ω or less. For the sheet according to Claim 1 or 2, when it is subjected to a heat generation test irradiated with 50kW/m ² of radiant heat, the total heat generation will be below 8MJ/m ² 20 minutes after the start of heating. For the sheet according to claim 1 or 2, when it is subjected to a heat generation test irradiated with 50kW/m ² radiant heat, 20 minutes after the start of heating, the heat generation rate does not exceed 200kW/m ² for more than 10 seconds. A sheet is used as a sheet for a smoke-proof vertical wall, and the sheet is the sheet according to any one of Claims 1 to 10. Such as the use of claim 11, wherein the above-mentioned smoke-proof vertical wall is for a tension-type smoke-proof vertical wall. A smoke-proof hanging wall, comprising the sheet material according to any one of Claims 1-10. A method of manufacturing a sheet, the sheet is the sheet according to any one of Claims 1 to 10, and the manufacturing method includes: Step 1, preparing an intermediate sheet A, curing for forming a curable resin layer Resin solution B, glass fiber cloth C and engineering film D, the intermediate sheet A is laminated with a thermoplastic resin film with a thickness of 90-130 μm on the curable resin layer, and the curable resin layer is impregnated with The state of the glass fiber cloth is included; and step 2, with the aforementioned intermediate sheet A and the aforementioned engineering film D, and in such a way that the thermoplastic resin film surface side of the aforementioned intermediate sheet A is on the aforementioned glass fiber cloth C side , clamp the aforementioned glass fiber cloth C impregnated with the aforementioned curable resin solution B, and harden the aforementioned curable resin solution B in this state, thereby obtaining a sheet with a mass of 300-450 g/m ² .

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