JP2022155497A - Sheet for smokeproof vertical wall and smokeproof vertical wall - Google Patents

Abstract

To provide a sheet for a smokeproof vertical wall which is excellent in tensile strength, and is difficult to be deformed and be burned in the case of fire, and a smokeproof vertical wall having the sheet.SOLUTION: A sheet for a smokeproof vertical wall includes a thermoplastic resin film, and curable resin layers which are laminated on both surfaces of the thermoplastic resin film and are impregnated into glass fiber cloths, wherein a thickness of the thermoplastic resin film is 90-130 μm, and a mass of the sheet is 300-450 g/m2.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a smoke-proof hanging wall sheet and a smoke-proof hanging wall using the sheet.

The laws and regulations of various countries, including Japan (for example, in Japan, the Building Standards Law and the Building Standards Law Enforcement Ordinance) impede the flow of smoke, toxic gases, etc. It also stipulates that a smoke exhaust system should be installed so that fire extinguishing activities can be carried out smoothly. Therefore, buildings such as office buildings and commercial facilities are often provided with smoke-proof hanging walls and the like as smoke-exhausting facilities and smoke-blocking facilities.

Hanging smoke barriers are usually used in buildings to temporarily block the flow of smoke, toxic gases, etc. in the event of a fire to corridors and upper floors, and to secure the time necessary for evacuation. attached to the ceiling. For this reason, sheet glass, a resin composite of glass fiber and resin, and the like are used as the smoke-proof hanging wall so that the view is not obstructed and the appearance is not spoiled by the smoke-proof hanging wall. A resin composite of glass fiber and resin has the advantage of being less likely to break than sheet glass. For example, Patent Literature 1 discloses a transparent nonflammable sheet including a glass fiber fabric and a cured resin layer.

JP-A-2005-319746

The transparent noncombustible sheet disclosed in Patent Document 1 is inferior in tear strength, and there is a problem that it is likely to break when it is constructed as a smoke-proof hanging wall, especially when it is constructed as a tension-type smoke-proof hanging wall. . A tension-type smoke-proof hanging wall is a hanging wall in which a sheet is stretched between two pairs of mullions. Smoke barriers without

Therefore, the present invention solves the above problems and provides a novel sheet for smoke-proof hanging wall that is excellent in tear strength, is not easily deformed in the event of a fire, and is difficult to burn, and a smoke-proof hanging wall comprising the sheet. Make it the main issue.

As a result of intensive studies conducted by the present inventors in order to solve the above problems, it was found that providing a thermoplastic resin film in the sheet for smoke-proof hanging wall is important in order to increase the tear strength. Here, in order to improve the transparency of the smokeproof hanging wall sheet, it is important to improve the transparency of the thermoplastic resin film. However, in order to increase the transparency of the thermoplastic resin film, for example, when adopting a highly transparent polyethylene terephthalate film or polycarbonate film as the thermoplastic resin film, the film is relatively expensive. If the number of film layers increases, the cost of the smokeproof hanging wall sheet itself becomes relatively high.

Then, the inventors of the present invention have found that as a sheet for a smoke-proof hanging wall, a curable resin layer contained in a state impregnated in a glass fiber cloth / a thermoplastic resin film / a curable resin contained in a state impregnated in a glass fiber cloth If a layer structure in which resin layers are laminated in this order is adopted, and the thickness of the thermoplastic resin film is set to a specific range or more, the tear strength of the sheet is increased, and only one thermoplastic resin film is provided. Therefore, even if a relatively expensive film is used as the thermoplastic resin film, it has been found that it is possible to manufacture the film at a relatively low cost.

However, as a result of investigations by the present inventors, it has been found that the curable resin layer/thermoplastic resin film/glass fiber cloth that is impregnated in the glass fiber cloth is simply used as a smokeproof hanging wall sheet. While adopting a layered structure in which curable resin layers are laminated in this order, the thermoplastic resin film is difficult to deform and burn in the event of a fire, simply by setting the thickness of the thermoplastic resin film to a specific range or more. It was found that the required performance as a smoke-proof hanging wall could not be provided.

Therefore, the present inventors evaluated the difficulty of deformation of the sheet for smoke-proof hanging wall during fire by observing the presence or absence of deformation in a heating test. The inventors of the present invention have found that when the smoke barrier sheet is heated, the thermoplastic resin film is more susceptible to heat shrinkage than the curable resin layer. As a result, the extent of heat shrinkage of the thermoplastic resin film increases, and the entire sheet for smoke-proof hanging wall tends to be deformed. Furthermore, the inventors of the present invention continued to study, and in order to provide the smoke barrier sheet with excellent tear strength, resistance to deformation in the event of a fire, and resistance to burning, there are two types of "thermoplastic resin film" and "corresponding thermal A sheet for a smoke barrier wall that contains a curable resin layer that is laminated on both sides of a plastic resin film and is contained in a state in which the glass fiber cloth is impregnated, wherein the thickness of the thermoplastic resin film and the smoke barrier It has been found that it is important to have the weight of the wall sheet within a certain range. The present invention is an invention that has been completed through intensive studies based on such findings.

That is, the present invention provides inventions in the following aspects.
Section 1. a thermoplastic resin film;
a curable resin layer impregnated in a glass fiber cloth laminated on both sides of the thermoplastic resin film,
A smokeproof hanging wall sheet, wherein the thickness of the thermoplastic resin film is 90 to 130 μm, and the mass of the sheet is 300 to 450 g/m ² .
Section 2. The thermoplastic resin film has a thickness of 120 to 130 μm,
Item 2. The sheet for smoke barrier hanging wall according to Item 1, wherein the mass of the sheet is 350 to 430 g/m ² .
Item 3. Item 3. The sheet for smoke-proof hanging wall according to Item 1 or 2, wherein the resin forming the curable resin layer is a photocurable resin.
Section 4. 4. The smoke barrier sheet for hanging wall according to any one of items 1 to 3, wherein the thermoplastic resin is polyethylene terephthalate.
Item 5. Item 5. The sheet for smoke barrier hanging wall according to any one of items 1 to 4, wherein the bromine concentration of the curable resin layer is 5 to 30% by mass.
Item 6. Item 6. The sheet for smokeproof hanging wall according to any one of Items 1 to 5, which has a total light transmittance of 80% or more and a haze of 20% or less.
Item 7. Item 7. The sheet for smoke barrier hanging wall according to any one of Items 1 to 6, which has a tear strength of 30 N or more.
Item 8. Item 8. The sheet for smokeproof hanging walls according to any one of Items 1 to 7, which has a surface resistivity of 5×10 ¹² Ω or less.
Item 9. Item 9. Smoke control according to any one of Items 1 to 8, wherein the total heat generation amount is 8 MJ/m ² or less for 20 minutes after the start of heating when subjected to a heat generation test in which 50 kW/m ² of radiant heat is irradiated. Sheet for hanging walls.
Item 10. Any one of items 1 to 9, wherein the heat generation rate does not exceed 200 kW/m ² continuously for 10 seconds or more for 20 minutes after the start of heating when subjected to a heat generation test in which 50 kW/m ² of radiant heat is irradiated. Sheet for smoke-proof hanging wall described in .
Item 11. Item 11. The sheet for smoke-proof hanging wall according to any one of items 1 to 10, wherein the smoke-proof hanging wall is a tension-type smoke-proof hanging wall.
Item 12. A smoke-proof hanging wall comprising the sheet for smoke-proof hanging wall according to any one of Items 1 to 11.
Item 13. Item 12. A method for producing a sheet for smoke-proof hanging wall according to any one of items 1 to 11, comprising the following steps 1 and 2.
Step 1: An intermediate sheet A in which a thermoplastic resin film having a thickness of 90 to 130 μm is laminated on a curable resin layer impregnated in a glass fiber cloth, and a curable property for forming the curable resin layer. Preparing a resin solution B, a glass fiber cloth C, and a process film D;
Step 2: The glass fiber cloth C impregnated with the curable resin solution B is combined with the intermediate sheet A and the process film D, and the surface side of the thermoplastic resin film of the intermediate sheet A is the glass fiber A step 2 of obtaining a sheet having a mass of 300 to 450 g/m ² by sandwiching so as to face the cloth C side and curing the curable resin solution B in this state.

According to the sheet for a smoke-proof hanging wall of the present invention, it is possible to provide a sheet for a smoke-proof hanging wall that is excellent in tear strength, is not easily deformed in the event of a fire, and is difficult to burn, and a smoke-proof hanging wall comprising the sheet. can.

BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram which shows an example of the sheet|seat for smokeproof hanging walls of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic-drawing top view explaining the measuring method of the tear strength of this invention. The outline of the test equipment used when performing "4.9.2 Exothermic test" in the "Fireproof performance test and evaluation work method manual" (revised on July 1, 2021) of the General Incorporated Foundation Testing Center for Building Materials FIG. 4 is a diagram showing; Included in the test equipment used when performing "4.9.2 Exothermic test" in the "Fireproof performance test and evaluation work method" (revised on July 1, 2021) of the Building Materials Testing Center Fig. 2 is a schematic diagram of a test holder and a hold-down frame; The unit of numerical values (dimensions) shown in FIG. 4 is mm.

1. Sheet for Smoke-Proof Hanging Wall The sheet for smoke-proof hanging wall of the present invention comprises a thermoplastic resin film and curable resin layers laminated on both sides of the thermoplastic resin film and contained in a state impregnated with glass fiber cloth. and wherein the thickness of the thermoplastic resin film is 90 to 130 μm, and the mass of the sheet is 300 to 450 g/m ² . The sheet for smokeproof hanging walls of the present invention will be described below.

[Layered structure of sheet for smoke-proof hanging wall]
The smokeproof hanging wall sheet 1 of the present invention includes a "thermoplastic resin film 2" and a "hardening resin layer that is impregnated in the glass fiber cloth 3 and is laminated on both sides of the thermoplastic resin film 2. 4”. FIG. 1 shows an example of a schematic cross-sectional view of the sheet 1 for smokeproof vertical walls of the present invention in the thickness direction. In the sheet 1 for smoke-proof hanging wall shown in FIG. The flexible resin layer 4 has a layer structure laminated in this order. That is, the smoke barrier sheet 1 of the present invention shown in FIG. 1 includes one 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 that make up the glass fiber cloth 3, and one surface side portion 41 of the curable resin layer 4 and the other surface side portion 42 communicates through the gap.

The number of layers of the thermoplastic resin film 2 provided in the sheet for smoke barrier hanging wall 1 of the present invention is not particularly limited, but from the viewpoint of lowering the cost, one layer is preferable. Further, another layer such as an adhesive layer may be included between the thermoplastic resin film 2 and the curable resin layer 4, or the curable resin layer 4 is directly laminated on the thermoplastic resin film 2. It may be From the viewpoint of further improving the transparency of the sheet for smoke-proof hanging wall and from the viewpoint of making it possible to manufacture it at a lower cost, it is preferable that the curable resin layer 4 is directly laminated on the thermoplastic resin film 2. .

[Structure of each layer]
Hereinafter, the composition of each layer constituting the sheet 1 for smokeproof hanging walls of the present invention will be described in detail.

Thermoplastic resin film 2
The smokeproof hanging wall sheet 1 of the present invention includes a thermoplastic resin film 2 . As a result, the smokeproof hanging wall sheet can be provided with excellent tear strength.

The type of thermoplastic resin that constitutes the thermoplastic resin film 2 is not particularly limited, but thermoplastic resins other than polyvinyl chloride are preferable from the viewpoint of further improving the transparency of the smoke-proof hanging wall sheet. Polyvinyl chloride film contains a large amount of plasticizer, and the plasticizer bleeds out to the surface when used as a smoke barrier, which may adversely affect the visibility of the smoke barrier. Specific examples of the thermoplastic resin forming the thermoplastic resin film 2 include polyester, polycarbonate, polyolefin, polyamide, polycycloolefin, and the like. Among these, polyester is preferred. Specific examples of polyester include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene-2.6-naphthalate (PEN), with polyethylene terephthalate (PET) being particularly preferred.

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

The thickness of the thermoplastic resin film 2 is 90-130 μm. With such a thickness, the resulting smokeproof hanging wall sheet has excellent tear strength, and can be provided with properties that are difficult to deform and difficult to burn in the event of a fire. The thickness of the thermoplastic resin film 2 is preferably 100 from the viewpoint that the sheet 1 for smoke-proof hanging walls of the present invention is more preferably provided with tear strength, resistance to deformation in the event of fire, and resistance to burning. up to 130 μm, more preferably 120 to 130 μm.

In the smokeproof hanging wall sheet 1 of the present invention, the mass of the thermoplastic resin film 2 is, for example, 100 to 200 g/m ² . From the viewpoint of making it easier to achieve both an improvement in tear strength and a flame retardant property of the smoke-proof hanging wall sheet 1, the mass of the thermoplastic resin film 2 is preferably from 130 to 180 g/m ² , more preferably from 160 to 160 g/m 2 . 180 g/m ² can be mentioned.

The total light transmittance of the thermoplastic resin film 2 is not particularly limited, but is, for example, 85% or more, preferably 90% or more, and more preferably 91 to 98%. The haze of the thermoplastic resin film 2 is not particularly limited, but is, for example, 5% or less, preferably 1.5% or less, and more preferably 0.3 to 1.0%. In this specification, the total light transmittance of the thermoplastic resin film layer 2 is measured according to Japanese Industrial Standard JIS K7361-1 1997 "Plastics-Testing method for total light transmittance of transparent materials-Part 1: Single beam method". is the value to be The haze of the thermoplastic resin film layer 2 is a value measured according to Japanese Industrial Standards JIS K7136 2000 "Plastics - Determination of haze of transparent materials".

An example of the thermoplastic resin film 2 is one that does not substantially contain bromine. Here, "substantially does not contain bromine" means that the bromine concentration of the thermoplastic resin film 2 is 1% by mass or less. Examples of the thermoplastic resin film 2 include those having a bromine concentration of 0.1% by mass or less and those containing no bromine. In this specification, the bromine concentration of the thermoplastic resin film 2 is a value measured using energy dispersive X-ray analysis (EDS analysis).

Glass fiber cloth 3
The glass fiber cloth 3 is composed of a plurality of glass fibers. In the glass fiber cloth 3, a plurality of glass fibers are intertwined with each other to form one piece of cloth. Examples of the glass fiber cloth 3 include a glass fiber fabric (glass cloth) composed of a plurality of warps and a plurality of wefts. The weave structure of the glass fiber fabric is not particularly limited, and examples thereof include plain weave, satin weave, twill weave, basket weave, and ridge weave.

When the glass fiber cloth 3 is a glass fiber fabric, its weaving density is not particularly limited. 70/25 mm, and the weft density is 30 to 120/25 mm, preferably 40 to 90/25 mm, and more preferably 50 to 70/25 mm. As used herein, the weave density is a value measured according to the method specified in Japanese Industrial Standard JIS R 3420:2013 "Glass fiber general test method", "7.9 Density (weave density)". .

The glass material of the glass fiber constituting the glass fiber cloth 3 is not particularly limited, and a known glass material can be used. Examples of glass materials include alkali-free glass (E glass), acid-resistant alkali-containing glass (C glass), high-strength, high-modulus glass (S glass, T glass, etc.), alkali-resistant glass (AR glass), and the like. is mentioned. Among these glass materials, alkali-free glass (E glass) is highly versatile and suitable. The glass fibers forming the glass fiber cloth 3 may be made of one type of glass material, or may be made of a combination of two or more types of glass fibers made of different glass materials. From the viewpoint of improving the transparency of the sheet 1 for smokeproof hanging wall, it is preferable to select a glass material having a refractive index similar to that of the curable resin layer 4, which will be described later.

As the glass fiber constituting the glass fiber cloth 3, a glass yarn obtained by twisting a plurality of monofilaments, which are long glass fibers, is preferable. The number of single fibers contained in one glass yarn is, for example, about 30 to 400, preferably about 40 to 200, more preferably about 40 to 120, still more preferably 80 to 120. . Further, the average diameter of single fibers in the glass yarn is, for example, about 3.0 to 6.0 μm, preferably about 3.0 to 5.5 μm, more preferably 4.8 to 5.5 μm. The count of the glass yarn is, for example, 3 to 30 tex, preferably 1 to 12 tex, more preferably 1 to 6 tex, even more preferably 4 to 6 tex, particularly preferably 5 to 6 tex. In this specification, the number of single fibers contained in one glass yarn is obtained by observing the cross section of the single fibers that constitute each glass yarn with a scanning electron microscope (SEM) at a magnification of 500 for 20 glass yarns. Therefore, it is a value obtained by measuring the number of single fibers contained in one glass yarn and calculating the average value. The average diameter of the single fibers in the glass yarn was determined by observing the cross section of the single fibers constituting each glass yarn with a scanning electron microscope (SEM) at a magnification of 500 times for 20 glass yarns. is the value obtained by measuring the largest part) and calculating the average value. The unit of count of the glass yarn, tex, corresponds to the number of grams per 1000 m, and according to the method specified in "7.1 count" of the Japanese Industrial Standard JIS R 3420 2013 "Glass fiber general test method" It is the measured value.

The glass fiber cloth 3 may be composed of one kind of glass yarn, or may be composed of two or more kinds of glass yarns having different numbers, diameters, counts, etc. of the constituting monofilaments.

The thickness of one glass fiber cloth 3 is, for example, 10 to 60 μm, preferably 25 to 50 μm, more preferably 25 to 35 μm. In this specification, the thickness of one sheet of the glass fiber cloth 3 is defined in Japanese Industrial Standard JIS R3420:2013 "Glass fiber general test method", "7.10.1 Thickness of cloth" A method It is a value measured according to

Further, the mass of one glass fiber cloth 3 is, for example, 10 to 60 g/m ² , preferably 25 to 50 g/m ² , more preferably 25 to 35 g/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, and more preferably 0.01 or less. The refractive index of the glass fiber cloth 3 is, for example, approximately 1.45 to 1.65, preferably approximately 1.50 to 1.60. In the present specification, the refractive index of the glass fiber cloth 3 is a value measured according to the "B method" defined in the Japanese Industrial Standard "JIS K 7142:2008 Plastics-Determination of refractive index".

Although the glass volume fraction of the glass fiber cloth 3 is not particularly limited, it is preferably 38% or more. The glass fiber cloth 3 having a glass volume fraction of 38% or more can be obtained, for example, by subjecting glass fibers to opening treatment. In this specification, the glass volume fraction of the glass fiber cloth 3 is a value calculated according to the following formula.

In the sheet for smoke-proof hanging wall 1 of the present invention, the mass ratio of the glass fiber cloth 3 and the curable resin layer 4 is not particularly limited, but from the viewpoint of further improving the transparency of the smoke-proof hanging wall sheet 1, , the glass fiber cloth 3 is 20 to 50 parts by weight, preferably 20 to 40 parts by weight, more preferably 25 to 35 parts by weight per 100 parts by weight of the total weight of the glass fiber cloth 3 and the curable resin layer 4. Further, the mass ratio of the glass fiber cloth 3 in the sheet for smoke-proof hanging wall 1 of the present invention is not particularly limited, but from the viewpoint of further improving the transparency of the sheet for smoke-proof hanging wall 1, The total amount of the two glass fiber cloths 3 is 5 to 30% by mass, preferably 10 to 25% by mass, per 100% by mass of the total mass of the sheet 1 for printing.

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

Hardening resin layer 4
In the smokeproof hanging wall sheet 1 of the present invention, the curable resin layer 4 is impregnated with the glass fiber cloth 3 described above, and is formed of a cured curable resin. Specifically, the curable resin layer 4 is formed of a cured product obtained by curing the curable resin by applying energy such as light or heat to the curable resin.

From the viewpoint of further improving the transparency of the sheet 1 for smoke-proof hanging wall, the curable resin is preferably one capable of approximating the refractive index of the curable resin layer 4 and the glass fiber cloth 3 . A photocurable resin is preferably used as the curable resin. Examples of photocurable resins include vinyl ester resins, urethane acrylate resins, fluorene acrylate resins, unsaturated polyester resins, curable acrylic resins, and epoxy resins.

Examples of the vinyl ester resin include bisphenol A type vinyl ester, brominated bisphenol A type vinyl ester, novolac type vinyl ester, and the like. Among these vinyl ester resins, one or more selected from the group consisting of bisphenol A type vinyl ester, brominated bisphenol A type vinyl ester and novolac type vinyl ester is preferably included, and bisphenol A type vinyl ester and brominated It is more preferable to use bisphenol A type vinyl ester 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 syrup, it is possible to further improve the transparency and antistatic performance of the smoke-proof hanging wall sheet 1 . In the present invention, acrylic syrup refers to a polymerizable liquid mixture obtained by dissolving a (meth)acrylic acid ester polymer such as polymethyl methacrylate (PMMA) in an acrylic monomer such as methyl methacrylate. Among the above acrylic syrups, one or more acrylic acid ester polymers selected from the group consisting of polymethyl methacrylate, methyl methacrylate/methyl acrylate copolymers, and methyl methacrylate/n-butyl acrylate copolymers are methacrylic. Acrylic syrup dissolved in methyl acid monomer is particularly preferred.

Other preferred examples of the curable resin forming the curable resin layer 4 include curable acrylic resins, epoxy resins, and vinyl ester resins, with brominated bisphenol A-type vinyl ester being more preferred. By using these curable resins, it is possible to further improve the flame-retardant properties of the sheet 1 for smoke-proof hanging walls.

It is preferable that the curable resin layer 4 does not contain a 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 flame resistance of the sheet 1 for smoke-proof hanging walls. Examples of flame retardants include phosphoric acid ester flame retardants, halogen-containing organic compounds, and inorganic flame retardants. Among them, halogen-containing organic compounds are preferred, and bromine-containing organic compounds are more preferred. Specific examples of bromine-containing organic compounds include hexabromocyclododecane (HBCD), decabromodiphenyl oxide (DBDPO), octabromodiphenyl oxide, tetrabromobisphenol A (TBBA), bis(tribromophenoxy)ethane, bis (pentabromophenoxy)ethane (BPBPE), tetrabromobisphenol A epoxy resin (TBBA epoxy), tetrabromobisphenol A carbonate (TBBA-PC), ethylene (bistetrabromophthal)imide (EBTBPI), ethylenebispentabromodiphenyl, Tris(tribromophenoxy)triazine (TTBPTA), bis(dibromopropyl)tetrabromobisphenol A (DBP-TBBA), bis(dibromopropyl)tetrabromobisphenol S (DBP-TBBS), brominated polyphenylene ether (poly(di) (including bromophenylene ether, etc.) (BrPPE), brominated polystyrene (including polydibromostyrene, polytribromostyrene, crosslinked brominated polystyrene, etc.) (BrPS), brominated crosslinked aromatic polymer, brominated epoxy resin, bromine phenoxy resin, brominated styrene-maleic anhydride polymer, tetrabromobisphenol S (TBBS), tris(tribromoneopentyl)phosphate (TTBNPP), polybromotrimethylphenylindane (PBPI), and tris(dibromopropyl)- isocyanurate (TDBPIC) and the like. Among these, TBBA is preferred.

An example of the curable resin layer 4 is one having a bromine concentration of 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 possible to more favorably achieve both flame resistance and transparency. Another example of the curable resin layer 4 is one that does not substantially contain bromine. Here, "substantially does not contain 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 have a bromine concentration of 0.5% by mass or less, a bromine concentration of 0.1% by mass or less, or contain 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).

Moreover, the curable resin layer 4 may contain an antistatic agent on the surface of the curable resin layer 4 and/or in the curable resin layer 4 . Examples of antistatic agents include surfactants, metals, and metal compounds.

Surfactants used as antistatic agents include cationic surfactants, anionic surfactants, nonionic (nonionic) surfactants, and amphoteric surfactants. Examples of cationic surfactants include alkylamine salts such as monoalkylamine salts, dialkylamine salts and trialkylamine salts; quaternary ammonium salts such as alkyltrimethylammonium hydride and dialkyldimethylammonium hydride. The cationic surfactant may also be a reactive cationic surfactant having a reactive double bond. Furthermore, the cationic surfactant may be a fluorine-based cationic surfactant having a perfluoroalkyl group in its structure.

Examples of anionic surfactants include higher alcohol sulfate salts, higher alkylsulfonic acids and salts thereof, alkylbenzenesulfonic acids and salts thereof, polyoxyethylene alkyl sulfate salts, polyoxyethylene alkylphenyl ether sulfate salts, vinyl sulfonate succinates, polyoxyalkylene alkyl ether sulfates, and the like. Further, the anionic surfactant may be a reactive anionic surfactant having a reactive double bond. Examples of reactive anionic surfactants having a reactive double bond include sulfuric acid ester salts of alkylpropenylphenol polyethylene oxide adducts, sulfuric acid ester salts of allylalkylphenol polyethylene oxide adducts, and allyldialkylphenol polyethylene oxide adducts. and the like. Furthermore, the anionic surfactant may be a fluorine-based anionic surfactant having a perfluoroalkyl group in its structure.

Examples of nonionic surfactants include polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyethylene glycol fatty acid esters, ethylene oxide propylene oxide block copolymers, polyoxyethylene fatty acid amides, ethylene oxide-propylene oxide copolymers, and sorbitan derivatives such as polyoxyethylene sorbitan fatty acid esters. Moreover, the nonionic surfactant may be a reactive nonionic surfactant having a reactive double bond. Examples of reactive nonionic surfactants having a reactive double bond include alkylpropenylphenol-polyethylene oxide adducts, allylalkylphenol-polyethylene oxide adducts, allyldialkylphenol-polyethylene oxide adducts, and the like. Furthermore, the nonionic surfactant may be a fluorine-based nonionic surfactant having a perfluoroalkyl group in its structure.

Among the surfactants, anionic surfactants are preferred, and polyoxyalkylene alkyl ether sulfates are particularly preferred, from the viewpoint of more preferably achieving both transparency and antistatic properties.

Examples of metal elements constituting metals or metal compounds used as antistatic agents include Ag, Ni, Cu, Sn, Sb, Al, In, and Ti. A metal element having an electrode potential of less than 0 eV may be used. 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.).

The content of the antistatic agent in the curable resin layer 4 is, for example, 1 to 10 parts by mass, preferably 3 to 8 parts by mass, per 100 parts by mass of the total amount of the curable resin layer 4 .

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-propane- 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-methylthiophenyl)-2-morpholinopropan-1-one, 2-benzyl -2-dimethylamino-1-(4-morpholinophenyl)-butanone-1,2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl ]-1-butanone, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide and the like. Among these photopolymerization initiators, 1-hydroxy-cyclohexyl-phenyl-ketone is preferable from the viewpoint of improving the transparency of the sheet 1 for smoke-proof hanging wall. These photopolymerization initiators may be used singly or in combination of two or more. The content ratio of the polymerization initiator in the curable resin layer 4 is 1 to 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 increase the transparency of the sheet 1 for smokeproof hanging walls, it is desirable to set the refractive indices of the glass fiber cloth 3 and the curable resin layer 4 so as to approximate each other. 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 according to the "method B" specified in Japanese Industrial Standard JIS K 7142:2008 "Plastics - Determination of refractive index".

In the smoke barrier sheet 1 of the present invention, the weight per layer of the curable resin layer 4 (the weight excluding the glass fiber cloth 3) is, for example, 50 to 100 g/m ² . In the smokeproof hanging wall sheet 1 of the present invention, from the viewpoint of more preferably achieving both improvement in transparency and difficulty in heat generation, the mass per layer of the curable resin layer 4 (glass fiber cloth 3 (mass excluding ) is preferably 50 to 80 g/m ² , more preferably 50 to 70 g/m ² .

The thickness of one layer of the curable resin layer 4 (thickness including the glass fiber cloth 3) is, for example, 40 to 100 μm. In the smokeproof hanging wall sheet 1 of the present invention, from the viewpoint of more preferably achieving both improved transparency and resistance to burning, the thickness of each curable resin layer 4 (the glass fiber cloth 3 is The thickness of the containing state) is preferably 40 to 80 μm, more preferably 55 to 70 μm.

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

[Characteristics of sheets for smoke-proof hanging walls]
The smokeproof hanging wall sheet 1 of the present invention has a high smokeproof hanging wall sheet 1 in order to prevent it from obstructing the field of view and impairing the appearance when used as a smokeproof hanging wall. It preferably has transparency. From the viewpoint of ensuring high transparency, the total light transmittance of the smokeproof hanging wall sheet 1 of the present invention is 80% or more, preferably 85% or more, and more preferably 90% or more. Further, the haze of the sheet 1 for smokeproof hanging walls of the present invention is, for example, 20% or less, preferably 10% or less, more preferably 5% or less, and still more preferably 2% or less. In this specification, the total light transmittance of the smoke-proof hanging wall sheet 1 is determined according to Japanese Industrial Standards JIS K 7361-1: 1997 "Plastics-Testing method for total light transmittance of transparent materials-Part 1: Single beam method ” is a value measured according to The haze of the smoke-proof hanging wall sheet 1 is a value measured in accordance with Japanese Industrial Standards JIS K7136 2000 "Plastics - Determination of haze of transparent materials".

The smokeproof hanging wall sheet 1 of the present invention has excellent tear strength. The tear strength of the smokeproof hanging wall sheet 1 of the present invention is, for example, 30 N or more, preferably 40 N or more. The upper limit of the tear strength of the smoke barrier sheet 1 of the present invention is not particularly limited, but examples thereof include 100N or less, 80N or less, or 60N or less. Specific examples of the tear strength of the sheet 1 for smokeproof hanging walls of the present invention include 30 to 100N, 40 to 80N, and 40 to 60N. In this specification, the tear strength of the smoke barrier sheet 1 is measured using a constant-speed load type tensile tester under the conditions of a gripping distance of 25 mm and a tensile speed of 200 mm/min. It is the average value of the "maximum load in the vertical direction (N)" and the "maximum load in the horizontal direction (N)" measured by performing tensile tests in the vertical direction and the horizontal direction.

The smokeproof hanging wall sheet 1 of the present invention has a property of being resistant to burning (hardly generating heat) in the event of a fire. As an index of the characteristics of the sheet 1 for smoke barrier hanging walls of the present invention, in a heat generation test in which radiant heat of 50 kW/m ² is applied, the total amount of heat generated for 20 minutes after the start of heating is, for example, 8 MJ/m ² or less. , preferably 6 MJ/m ² or less, more preferably 5 MJ/m ² or less. In addition, as another indicator of the characteristics of the sheet 1 for smoke barrier hanging wall of the present invention, in a heat generation test in which 50 kW/m ² of radiant heat is applied, the heat generation rate continues for 10 seconds or more for 20 minutes after the start of heating. Preferably, the heat generation rate does not exceed ^{200 kW} /m for 3 seconds or longer for 20 minutes after the start of heating; More preferably, the heat generation rate does not exceed It should not exceed 200 kW/m ² continuously for 1 second or more. The total calorific value and the heat generation rate per unit area in the exothermic test in which radiant heat is irradiated at 50 ^kW /m It is a value obtained according to "4.9.2 Pyrogenicity test" in July 1, 2007 revised edition). In addition, "4.9.2 Exothermic test" in the "Fireproof performance test and evaluation work method manual" (revised on July 1, 2021) is based on the "Fireproof performance test and evaluation It is substantially the same as "4.10.2 Pyrogenic test and evaluation method" in the Business Procedures Manual (revised on March 1, 2014).

The smokeproof hanging wall sheet 1 of the present invention preferably has a surface resistivity of 5×10 ¹² Ω or less. By setting the surface resistivity to such a value, it is possible to easily reduce adhesion of dust during construction as a smoke-proof hanging wall. In order to provide such a surface resistivity, for example, the curable resin layer 4 may contain an antistatic agent. In this specification, the surface resistivity of the sheet for smoke-proof hanging wall 1 is defined as "5.13.2 Lamination" of "5.13 Resistivity" of Japanese Industrial Standards JIS K 6911 1995 "General Test Methods for Thermosetting Plastics". It is a value measured according to the method specified in "Plate".

The mass of the smokeproof hanging wall sheet 1 of the present invention is 300 to 450 g/m ² . By satisfying such a mass, it becomes possible to provide the property of being difficult to burn (hardly generating heat) in the event of a fire. From the viewpoint of more preferably providing the property of being difficult to burn (hardly generating heat) in the event of a fire, the mass of the smoke-proof hanging wall sheet 1 of the present invention is preferably 330 to 430 g/m ² , more preferably 350 to 430 g/m 2 . ^m2 .

The thickness of the smokeproof hanging wall sheet 1 of the present invention is, for example, 200 to 330 μm, preferably 240 to 315 μm, more preferably 240 to 280 μm.

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

[Uses of sheets for smoke-proof hanging walls]
As used herein, the term “smoke-proof hanging wall” refers to a structure that is provided to temporarily block and guide smoke containing carbon monoxide, toxic gases, etc. generated during a fire, and is suspended from the ceiling of a building. It is a hanging wall that can be installed and is one of the smoke exhaust facilities. Further, in this specification, a sheet for a smoke-proof hanging wall is a sheet used as a wall member (hanging-wall main body) of the smoke-proof hanging wall.

The type of smoke-proof hanging wall to which the smoke-proof hanging wall sheet 1 of the present invention is applied is not particularly limited, but the smoke-proof hanging wall sheet 1 of the present invention is suitable as a sheet for a tension-type smoke-proof hanging wall. used for A tension-type smoke-proof hanging wall is a hanging wall in which a smoke-proof hanging wall sheet 1 is stretched between two pairs of mullions. A smoke-proof hanging wall having no blinds on the lower side of the wall sheet 1 is exemplified.

[Manufacturing method of sheet 1 for smoke-proof hanging wall of the present invention]
The method for producing the sheet 1 for smokeproof hanging walls of the present invention is not particularly limited, and an example thereof includes a production method including the following steps 1 and 2.
Step 1: An intermediate sheet A in which a thermoplastic resin film having a thickness of 90 to 130 μm is laminated on a curable resin layer impregnated in a glass fiber cloth, and a curable property for forming the curable resin layer. Preparing a resin solution B, a glass fiber cloth C, and a process film D;
Step 2: The glass fiber cloth C impregnated with the curable resin solution B is combined with the intermediate sheet A and the process film D, and the surface side of the thermoplastic resin film of the intermediate sheet A is the glass fiber A step of obtaining a sheet having a mass of 300 to 450 g/m ² by sandwiching so as to face the cloth C side and curing the curable resin solution B in this state.

Specifically, first, prepare one film to be 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 process films. do. A process film is a film that is temporarily used as a support during manufacturing. The process film may have a light transmittance that allows the curable resin solution to be photo-cured to form the curable resin layer 4, and examples thereof include a transparent PET film.

Next, the curable resin solution is applied to one side of one process film and one side of the film used as the thermoplastic resin film 2 . Then, the process film coated with the curable resin solution and the film to be the thermoplastic resin film 2 coated with the curable resin solution are used to form one glass fiber cloth 3 on the surface coated with the curable resin solution. The two sides of the glass fiber cloth 3 are impregnated with a desired amount of curable resin solution from both sides of the glass fiber cloth 3 by pressure bonding.

Then, the curable resin solution with which the glass fiber cloth 3 is impregnated is cured. In the case where the curable resin is a photocurable resin and the resin solution is cured by applying light energy, the curable resin solution is irradiated with light to be cured. As a condition for light irradiation, for example, an integrated light quantity of about 100 to 500 mJ/cm ² can be mentioned. In the manner described above, an intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 containing impregnated process film/glass fiber cloth 3 can be obtained. When the curable resin is a thermosetting resin, it can be cured by applying heat energy instead of applying light energy.

Next, the curable resin solution is applied to the surface side of the thermoplastic resin film 2 of the obtained intermediate sheet and to one surface side of the other one of the prepared process films. Then, another sheet of glass fiber cloth 3 is formed by the intermediate sheet coated with the curable resin solution and the process film coated with the curable resin solution, and the surface coated with the curable resin solution is the glass fiber cloth. A desired amount of curable resin solution is impregnated from both sides of the glass fiber cloth 3 by sandwiching the glass fiber cloth 3 so as to have 3 sides and press-bonding.

Next, the curable resin solution with which the glass fiber cloth 3 is impregnated is cured. The curing method is the same as described in the method for producing the intermediate sheet. Thus, the process film/hardening resin layer 4 impregnated with glass fiber cloth 3/thermoplastic resin film 2/hardening resin layer 4 impregnated with glass fiber cloth 3/process film A sheet having a layer structure of Then, by peeling off the process films on both surfaces, the smokeproof hanging wall sheet 1 of the present invention (that is, the curable resin layer 4 containing the glass fiber cloth 3 impregnated/thermoplastic resin film 2/ A sheet having a layer structure of the curable resin layer 4 in which the glass fiber cloth 3 is impregnated can be obtained. The process film can also be a cover film, in which case it can be peeled off after construction as a smoke barrier.

2. Smoke- proof hanging wall The smoke-proof hanging wall of the present invention comprises the smoke-proof hanging wall sheet 1 as a wall member (hanging wall main body). The type of smoke-proof hanging wall of the present invention is not particularly limited, but a preferred example is a tension-type smoke-proof hanging wall. A tension-type smoke-proof hanging wall is a hanging wall in which a smoke-proof hanging wall sheet 1 is stretched between two pairs of mullions. A smoke-proof hanging wall having no blinds on the lower side of the wall sheet 1 is exemplified.

EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples. However, the invention is not limited to the examples.

1. Measurement and evaluation method
1-1. Glass yarn single fiber average diameter (μm) and single fiber number (pieces)
Prepare two pieces of glass fiber cloth cut into 30 cm squares, one for warp observation and the other for weft observation, and embed each in epoxy resin (trade name “3091”, manufactured by Marumoto Struers Co., Ltd.). and hardened. Next, the glass cloth embedded in the epoxy resin is polished to the extent that the cross section of the single fibers constituting the warp or weft can be observed, and a scanning electron microscope (SEM) (trade name “JSM-6390A”, JEOL Ltd.) (manufactured by the company), and observed at a magnification of 500 times to measure the average single fiber diameter (μm) and the number of single fibers (fibers) of the glass yarn.
(1) Single fiber average diameter (μm) of long glass fiber
Twenty warps and wefts are randomly selected, and the cross section of all the single fibers contained in each of the twenty glass yarns is observed to measure the diameter and calculate the average value. diameter.
(2) Number of single fibers (number)
Twenty warps and wefts were randomly selected, and the total number of single fibers contained in each of the twenty glass yarns was measured, and the average value was calculated as the number of single fibers of the warp and weft.

1-2. Glass yarn count The glass yarn count was measured according to the method specified in "7.1 count" of Japanese Industrial Standards JIS R 3420 2013 "Glass fiber general test methods". Specifically, first, 500 m of glass yarn was collected from the winding device and used as a test piece. After laying the test piece flat and placing it in a muffle furnace and firing at 625° C. for 25 minutes, it was allowed to cool in a desiccator and the mass of the test piece was measured. The count was calculated according to the following formula.

1-3. Weave density of the glass fiber cloth 3 (fiber/25 mm)
The weave density of the glass fiber cloth 3 is the weave of warp and weft according to the method specified in "7.9 Density (weave density)" of Japanese Industrial Standards JIS R 3420: 2013 "Glass fiber general test method". Density was measured. Specifically, the measurement target was a position 50 mm or more away from the edge and selvage of the glass fiber cloth 3, the measurement interval was set to 10 mm or more and 200 mm or less, and the total number of yarns within the set measurement interval was measured. Taking this as one measurement, the yarn was moved to another position not containing the previously measured yarn, and the total number of yarns within the measurement interval was measured twice in the same manner. The number of yarns per 25 mm was obtained according to the following formula for each of the three measurements, and the average value of the three measurements was calculated.

1-4. Thickness of glass fiber cloth 3 (μm)
The thickness of the glass fiber cloth 3 was measured according to Method A specified in "7.10.1 Cloth thickness" of Japanese Industrial Standards JIS R3420:2013 "Glass fiber general test methods". Specifically, the thickness of the glass fiber cloth 3 was measured by gently rotating the spindle using a micrometer and bringing it into light contact with the measurement surface in parallel, and reading the scale after the ratchet sounded three times. It was measured. The thickness of the glass fiber cloth 3 was measured at the crossing points of warp and weft.

1-5. Refractive indices of the glass fiber cloth 3 and the curable resin layer 4 The refractive indices of the glass fiber cloth 3 and the curable resin layer 4 are specified in Japanese Industrial Standards JIS K 7142:2008 "Plastics - Determination of refractive index". It was measured according to the "B method". Specifically, first, the glass fiber and the curable resin layer 4 constituting the glass fiber cloth 3 were pulverized to such an extent that Becke lines could be observed when observed at a magnification of 400 using an optical microscope, and the measurement sample was obtained. did. Separately, a plurality of immersion liquids having refractive indices different by 0.002 were prepared. A small amount of the immersion liquid was placed on the slide glass, several grains of the measurement sample were further placed in the immersion liquid on the slide glass, and a cover glass was placed thereon. As a light source, a halogen lamp provided with an interference filter for the D line is used, and after focusing on the measurement sample at a magnification of 400 using an optical microscope, the stage of the microscope and the objective lens are separated. defocused a little. By this operation, when the refractive index of the measurement sample and the refractive index of the immersion liquid do not match, the Becke line (that is, the bright halo seen around or inside the powder) moves to the side where the refractive index is larger, and the refractive index of the measurement sample Becke lines do not appear when the refractive index and the refractive index of the immersion liquid match. By repeating the measurement until the refractive index of the measured sample matches that of the immersion liquid or the refractive index of the measured sample falls between two adjacent refractive indices in a series of immersion liquids, the refractive index was measured. The measurement of the refractive index was performed three times at a temperature of 23° C., and the average value of the three measurements was taken as the value of the refractive index.

1-6. Mass of glass fiber cloth 3 (g/m ² )
The mass of the glass fiber cloth 3 was measured according to the method defined in Japanese Industrial Standard JIS R 3420:2013 "General test methods for glass fibers", "7.2 Mass of cloth and mat (mass)". Specifically, a square test piece with an area of 100 cm ² was taken from a place 50 mm or more away from the edge of the glass fiber cloth 3, and after drying the test piece at 105°C for 1 hour, the mass of the test piece was measured. was measured, and the mass per 1 m ² was calculated according to the following formula.

1-7. Bromine concentration (% by mass) in thermoplastic resin film 2 and curable resin layer 4
Bromine concentrations in the thermoplastic resin film 2 and the curable resin layer 4 were measured by energy dispersive X-ray analysis (EDS analysis). Specifically, a measurement sample was obtained by cutting the smokeproof hanging wall sheet 1 into a size of 1 cm long×1 cm wide. The cut surface of the measurement sample (the cut surface in the thickness direction of the sheet for smoke-proof vertical wall 1) is set to the measurement surface, the vertical direction of the measurement sample is set to the depth direction at the time of measurement, and the thermoplastic resin in the cut surface of the measurement sample The bromine concentration 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, with the center of the film 2 as the measurement point. . Further, in the same manner, the bromine concentration in the curable resin layer 4 is 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 measurement point. did.

1-8. Total light transmittance (%) and haze (%)
The total light transmittance of the smoke-barrier hanging wall sheet 1 was measured according to Japanese Industrial Standard JIS K 7361-1:1997 "Plastics-Testing method for total light transmittance of transparent materials-Part 1: Single beam method". The haze of the smoke-barrier hanging wall sheet 1 was measured according to Japanese Industrial Standards JIS K 7136:2000 "Plastics - Determination of haze of transparent materials". The total light transmittance of the thermoplastic resin film layer 2 is a value measured according to Japanese Industrial Standard JIS K7361-1 1997 "Plastics-Testing method for total light transmittance of transparent materials-Part 1: Single beam method". . Further, the haze of the thermoplastic resin film layer 2 indicates a value measured according to Japanese Industrial Standard JIS K7136 2000 "Plastics - Determination of haze of transparent materials".

1-9. Surface resistivity (Ω)
The surface resistivity of the smoke barrier sheet 1 is defined in Japanese Industrial Standards JIS K 6911 1995 "General Test Methods for Thermosetting Plastics", "5.13 Resistivity", "5.13.2 Laminates". It was measured according to the method described in Specifically, a test piece was obtained by cutting the sheet 1 for smoke-barrier hanging wall 1 to have a length and a width of 100 mm while keeping the original thickness. The test piece was pretreated by leaving it in an atmosphere of 20±2° C. temperature and 65±5% humidity for 24 hours or more. A high resistance meter 4339B manufactured by Agilent Technologies Inc. was used as a measuring device, a test piece was pressed against an electrode, and the resistance value after charging for 1 minute at an applied voltage of 100 V was measured to obtain the surface resistivity.

1-10. Tear strength (N)
The tear strength of the smoke barrier sheet 1 was measured by performing a tensile test using a constant-speed load type tensile tester under the conditions of a grip interval of 25 mm and a tensile speed of 200 mm/min. Specifically, a test piece of 75 mm × 150 mm was taken from the sheet for smoke-proof hanging wall 1 in the vertical direction and the horizontal direction, and as shown in FIG. Mark an isosceles trapezoid with a height of 75 mm, and apply anti-slip tape ( A product name “600S” manufactured by Sekisui Chemical Co., Ltd.) was attached. In addition, the cut|interruption was not made in the test piece. Using a constant-speed load-type tensile tester (trade name “RTC-1310A”, manufactured by Orientec Co., Ltd.), the grip interval of the test piece is set to 25 mm, and the short side of the isosceles trapezoid of the test piece is stretched to obtain an isosceles trapezoid. The long side was loosened and sandwiched between clamps, a tensile test was performed at a tensile speed of 200 mm/min, and the maximum load exhibited when tearing was measured. The maximum load in the vertical direction and the maximum load in the horizontal direction are measured, and the average value of the maximum load in the vertical direction and the maximum load in the horizontal direction (= (Maximum load in the vertical direction (N) + Maximum load in the horizontal direction) The load (N))/2) was determined as the tear strength (N). Under this measurement condition, if the tear strength is 30 N or more, it is judged as having excellent tear strength.

1-11. Total calorific value (MJ/m ² ) in exothermic test, and duration of excess heat generation rate of 200 kW/m ² per unit area (seconds)
The total calorific value in the exothermic test in which the smoke barrier sheet 1 is irradiated with radiant heat of 50 kW/m ² and the duration of exceeding the heat generation rate of 200 kW/m ² per unit area are evaluated by the Building Materials Testing Center. It was measured according to "4.9.2 Heat generation test" in "Fire resistance performance test and evaluation work method manual" (revised on July 1, 2021). A specific method is as follows.

[Specimen]
(1) The number of specimens (smoke barrier sheet 1) shall be three.
(2) The shape and dimensions of the specimen shall be a square with one side measuring 99 mm ± 1 mm.
(3) Before the test, the specimen is aged at a temperature of 23°C ± 2°C and a relative humidity of 50% ± 5% so that it has a constant mass.
[Test equipment]
(1) A schematic diagram of the test equipment used is shown in FIG. The test equipment consists of a conically shaped radiant electric heater, a spark plug, a radiant heat shield, a specimen holder, a gas sampling device, an exhaust system capable of measuring the gas flow rate, a heat flow meter, and so on.
(2) The radiant electric heater shall be capable of stably radiating 50 kW/m ² of radiant heat to the surface of the specimen.
(3) The radiant heat shield shall be able to protect the specimen from radiant heat before the start of the test.
(4) Fig. 4 shows a schematic diagram of a test holder and a holding frame included in the test device. The specimen holder is made of stainless steel with outer dimensions of 106 mm ± 1 mm on a side, a size of 25 mm ± 1 mm in depth, and a thickness of 2.4 mm ± 0.15 mm. The holding frame is a square with a side of 111 mm ± 1 mm inside, a height of 54 mm ± 1 mm outside, a thickness of 1.9 mm ± 0.1 mm, and an upper part with a side of 94.0 mm ± 0.5 mm. Made of stainless steel with a square opening.
(5) The exhaust system shall be equipped with centrifugal exhaust fans, hoods, fan intake and exhaust ducts, orifice plate flow meters, etc. that function effectively at the test temperature. The distance between the lower end of the hood and the surface of the specimen shall be 210 mm ± 50 mm, and the exhaust device of the exhaust system in this state shall have a flow rate of 0.024 m ³ /s or more converted to standard temperature and standard pressure. . For exhaust gas flow measurement, an orifice plate with an inner diameter of 57 mm ± 3 mm and a thickness of 1.6 mm ± 0.3 mm is placed in the exhaust flue at a distance of 350 mm ± 15 mm or more downstream from the fan. For exhaust gas sampling purposes, a ring sampler with 12 2.2 mm ± 0.1 mm diameter holes is mounted 685 mm ± 15 mm from the hood with the holes pointing in the direction opposite to the flow. Also, the exhaust gas temperature is measured at the center of the exhaust duct at a position 100 mm±5 mm upstream from the orifice plate.
(6) The gas sampling device shall be able to continuously and accurately measure the concentration of oxygen, carbon monoxide and carbon dioxide in the exhaust gas.
(7) The spark plug shall be capable of supplying power from a 10 kV transformer or an inductive coil system or the like. The distance between the electrodes of the spark plug shall be 3 mm±0.5 mm, and the positions of the electrodes shall be, in principle, 13 mm±2 mm on the central axis of the specimen.
(8) The heat flow meter uses a Schmidt Boelter type capable of measuring up to 100 kW/m ² ±10 kW/m ² . The heat sensing part of the heat flow meter shall be circular with a diameter of 12.5 mm, and shall have a surface emissivity of 0.95±0.05.

[Test conditions]
(1) The test time shall be 20 minutes after the radiant heat is applied to the surface of the specimen and the electric spark is activated at the same time.
(2) The side and back of the test specimen are wrapped in aluminum foil with a thickness of 0.025 mm or more and 0.04 mm or less ^, and placed in a holding frame. It shall be filled and then pushed into the specimen holder.
(3) During the test, radiant heat of 50 kW/m ² is applied to the surface of the specimen from a radiant electric heater.
(4) Adjust the exhaust gas flow rate to 0.024 m ³ /s.
(5) Until the start of the test, prevent the specimen from receiving radiant heat with a radiant heat shield.
(6) Set the spark plug in place before moving the radiation heat shield.

[measurement]
(1) Measure oxygen concentration at intervals of 5 seconds or less.
(2) The heat generation rate per unit area (kW/m ² ) is calculated by the method shown below, and the duration of the state where the heat generation rate per unit area exceeds 200 kW/m ² is defined as the "heat generation rate per unit area. 200 kW/m ² excess duration". Furthermore, the total amount of heat generated per unit area (MJ/m ² ) is calculated by trapezoidally integrating the heat generation rate per unit area with time. Here, the trapezoidal integration is performed by dividing the test time into an integration interval, dividing the integration interval equally by the measurement interval, setting the negative heat release rate to 0, and integrating only the positive heat release rate.

1-12. The total calorific value (MJ/m ² ) in the exothermic test and the heat generation rate per unit area of 200 kW/m ² The exothermicity test shown in the column "Excess duration (seconds)" was performed, and the state of the test specimen was observed after radiant heat irradiation for 20 minutes, and the "difficulty in deformation during fire" was evaluated according to the following criteria.
<Evaluation Criteria for Difficulty of Deformation in Fire>
A: After irradiation with radiant heat for 20 minutes, the deformation of the specimen was suppressed, and the specimen was contained within the holding frame.
B: After being irradiated with radiant heat for 20 minutes, the test piece was deformed and did not fit within the holding frame.

2. Manufacture of sheets for smoke-proof hanging walls
Example 1
(Preparation of thermoplastic resin film layer 2)
As the thermoplastic resin film layer 2, a biaxially stretched polyester film (trade name “Cosmo Shine (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%).

(Preparation of glass fiber cloth 3)
Glass yarn (trade name “ECD900 1/0 1.0Z” manufactured by Unitika Glass Fiber Co., Ltd.; single fiber average diameter 5 μm, number of single fibers 100, twist number 1.0Z, count 5.6 tex) was used as the warp and weft. A plain weave glass fiber fabric having a warp density of 69/25 mm and a weft density of 69/25 mm was obtained by weaving with an air jet loom. Then, the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric were removed by heating at 400° C. for 30 hours. After that, the glass fiber fabric was treated with a silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride) Chisso Co., Ltd.) with a surface treatment agent adjusted to a concentration of 15 g / L. and squeezed with a padder roll, dried at 120° C. for 1 minute and cured. Then, the glass fiber fabric was widened once while the tension in the warp direction of the glass fiber fabric was set to 100 N/m by water flow processing at a pressure of 1.5 MPa to obtain a glass fiber cloth 3 (glass fiber fabric). The resulting glass fiber cloth 3 had a warp density of 69/25 mm, a weft density of 69/25 mm, a thickness of 30 μm, a mass of 31 g/m ² and a refractive index of 1.562. Two glass fiber cloths 3 were prepared. The glass fiber cloth 3 was used to measure the average single fiber diameter and the number of single fibers of the glass yarn.

(Preparation of curable resin solution used for forming curable resin layer 4)
As the curable resin solution used for forming the curable resin layer 4, bisphenol A type vinyl ester resin (trade name “Neopol 8114”, manufactured by Japan U-Pica Co., Ltd.), brominated bisphenol A type vinyl ester (trade name “Neopol 8197 ”), NPGDA (neopentyl glycol diacrylate, molecular weight 212, manufactured by Japan U-Pica Co., Ltd.), a photopolymerization initiator (trade name “Omnirad 184”, manufactured by IGM) and an antistatic agent (polyoxyalkylene alkyl ether sulfate; A product name “Electro Stripper ME-2” manufactured by Kao Corporation) was prepared and mixed so as to achieve the mass ratio shown in Table 1 to prepare a curable resin solution.

(Preparation of process film)
A PET film (thickness 50 μm, total light transmittance (JIS K7361-1 1997) 93%, haze (JIS K7136 2000) 4%) was prepared as a process film. Two process films were prepared.

(Preparation of intermediate sheet)
An intermediate sheet was prepared using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3. Specifically, first, the curable resin solution was applied to one side of the process film and one side of the thermoplastic resin film 2 . Then, the glass fiber cloth 3 is formed by the process film coated with the curable resin solution and the thermoplastic resin film 2 coated with the curable resin solution, and the surface coated with the curable resin solution is the glass fiber cloth 3. Both sides of the glass fiber cloth 3 were impregnated with the curable resin solution by pressing with rollers so that the mass of the curable resin layer 4 satisfies the value shown in Table 1. After that, while the thermoplastic resin film 2 and the process film are laminated, the curable resin solution is irradiated with light using a black light fluorescent lamp (trade name “FL15BLB”, manufactured by Toshiba Corporation) (light irradiation conditions: integrated light amount 200 mJ / cm ² ) to cure the curable resin solution to form the curable resin layer 4, and the curable resin layer 4/thermoplastic resin film 2 contained in the impregnated state of the process film/glass fiber cloth 3 An intermediate sheet having a layered structure was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one sheet of the intermediate sheet, one sheet of the process film, and one sheet of the glass fiber cloth 3, a smoke barrier sheet was prepared. Specifically, first, the curable resin solution was applied to the surface side of the thermoplastic resin film 2 of the intermediate sheet and to one surface side of the process film. Then, the intermediate sheet coated with the curable resin solution and the process film coated with the curable resin solution form the glass fiber cloth 3 so that the surface coated with the curable resin solution becomes the glass fiber cloth 3 side. Then, the glass fiber cloth 3 was impregnated with the curable resin solution from both sides by pressing with rollers so that the mass of the curable resin layer 4 satisfies the value shown in Table 1. After that, while the thermoplastic resin film 2 and the process film are laminated, the curable resin solution is irradiated with light using a black light fluorescent lamp (trade name “FL15BLB”, manufactured by Toshiba Corporation) (light irradiation conditions: integrated light amount 200 mJ / cm ² ) to cure the curable resin solution to form the curable resin layer 4, and the curable resin layer 4 contained in the impregnated state of the process film/glass fiber cloth 3/thermoplastic resin film 2/ A sheet having a layer structure of a curable resin layer 4 and a process film in which the glass fiber cloth 3 was impregnated was obtained. Then, the two process films arranged on both surface sides of the sheet are peeled off, and the layer structure shown in FIG. A sheet for a smoke-proof hanging wall having a layer structure consisting of a resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3 was obtained. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

Example 2
(Preparation of thermoplastic resin film layer 2)
The same thermoplastic resin film layer 2 as in Example 1 was prepared.

(Preparation of glass fiber cloth 3)
Glass yarn (trade name “ECD450 1/0 1.0Z” manufactured by Unitika Glass Fiber Co., Ltd.; single fiber average diameter 5 μm, number of single fibers 200, twist number 1.0Z, count 11.2 tex) was used as the warp and weft. A plain weave glass fiber fabric having a warp density of 53/25 mm and a weft density of 53/25 mm was obtained by weaving with an air jet loom. Then, the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric were removed by heating at 400° C. for 30 hours. After that, the glass fiber fabric was treated with a silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride) Chisso Co., Ltd.) with a surface treatment agent adjusted to a concentration of 15 g / L. and squeezed with a padder roll, dried at 120° C. for 1 minute and cured. Then, the glass fiber fabric was widened once while the tension in the warp direction of the glass fiber fabric was set to 100 N/m by water flow processing at a pressure of 1.5 MPa to obtain a glass fiber cloth 3 (glass fiber fabric). The resulting glass fiber cloth 3 had a warp density of 53/25 mm, a weft density of 53/25 mm, a thickness of 43 μm, a mass of 48 g/m ² and a refractive index of 1.562. Two glass fiber cloths 3 were prepared. The glass fiber cloth 3 was used to measure the average single fiber diameter and the number of single fibers of the glass yarn.

(Preparation of curable resin solution used for forming curable resin layer 4)
The same curable resin solution as in Example 1 was prepared.

(Preparation of process film)
Two sheets of the same process film as in Example 1 were prepared.

(Preparation of intermediate sheet)
Using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3, the process film/glass fiber cloth 3 was prepared in the same manner as in Example 1. An intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 contained in an impregnated state was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one intermediate sheet, one process film, and one glass fiber cloth 3, the layer structure shown in FIG. A smoke barrier having a layer structure consisting of a curable resin layer 4 impregnated with a fiber cloth 3/a thermoplastic resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3). A wall sheet was produced. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

Example 3
(Preparation of thermoplastic resin film layer 2)
The same thermoplastic resin film layer 2 as in Example 1 was prepared.

(Preparation of glass fiber cloth 3)
Two sheets of the same glass fiber cloth 3 as in Example 1 were prepared.

(Preparation of curable resin solution used for forming curable resin layer 4)
Acrylic syrup (trade name: “Acrysirup XD-8005” manufactured by Ryoko Co., Ltd.; refractive index: 1.550) and acrylic syrup (trade name: “Acrysirap XD-8006”) are used for forming the curable resin layer 4. , manufactured by Ryoko Co., Ltd.; refractive index 1.570), a photopolymerization initiator (trade name "Omnirad 184", manufactured by IGM) and an antistatic agent (trade name "ElectroStripper ME-2", manufactured by Kao Corporation) were prepared and mixed so as to have the mass ratio shown in Table 1 to prepare a curable resin solution.

(Preparation of process film)
Two sheets of the same process film as in Example 1 were prepared.

(Preparation of intermediate sheet)
Using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3, the process film/glass fiber cloth 3 was prepared in the same manner as in Example 1. An intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 contained in an impregnated state was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one intermediate sheet, one process film, and one glass fiber cloth 3, the layer structure shown in FIG. A smoke barrier having a layer structure consisting of a curable resin layer 4 impregnated with a fiber cloth 3/a thermoplastic resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3). A wall sheet was produced. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

Example 4
(Preparation of thermoplastic resin film layer 2)
As the thermoplastic resin film layer 2, 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%).

(Preparation of glass fiber cloth 3)
Two sheets of the same glass fiber cloth 3 as in Example 1 were prepared.

(Preparation of curable resin solution used for forming curable resin layer 4)
The same curable resin solution as in Example 1 was prepared.

(Preparation of process film)
Two sheets of the same process film as in Example 1 were prepared.

(Preparation of intermediate sheet)
Using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3, the process film/glass fiber cloth 3 was prepared in the same manner as in Example 1. An intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 contained in an impregnated state was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one intermediate sheet, one process film, and one glass fiber cloth 3, the layer structure shown in FIG. A smoke barrier having a layer structure consisting of a curable resin layer 4 impregnated with a fiber cloth 3/a thermoplastic resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3). A wall sheet was produced. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

Comparative example 1
(Preparation of thermoplastic resin film layer 2)
As the thermoplastic resin film layer 2, a biaxially stretched polyester film (trade name “Cosmo Shine (registered trademark) A4300” manufactured by Toyobo Co., Ltd.; thickness 75 μm, mass 105 g/m ² , total light transmittance (JIS K 7105: 1981) 93% and haze (JIS K 7105: 1981) 0.9%).

(Preparation of glass fiber cloth 3)
Two sheets of the same glass fiber cloth 3 as in Example 1 were prepared.

(Preparation of curable resin solution used for forming curable resin layer 4)
The same curable resin solution as in Example 1 was prepared.

(Preparation of process film)
Two sheets of the same process film as in Example 1 were prepared.

(Preparation of intermediate sheet)
Using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3, the process film/glass fiber cloth 3 was prepared in the same manner as in Example 1. An intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 contained in an impregnated state was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one intermediate sheet, one process film, and one glass fiber cloth 3, the layer structure shown in FIG. A smoke barrier having a layer structure consisting of a curable resin layer 4 impregnated with a fiber cloth 3/a thermoplastic resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3). A wall sheet was produced. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

Comparative example 2
(Preparation of thermoplastic resin film layer 2)
As the thermoplastic resin film layer 2, a biaxially stretched polyester film (trade name “Cosmo Shine (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%).

(Preparation of glass fiber cloth 3)
Glass yarn trade name "ECBC2250 1/0 1.0Z" manufactured by Unitika Glass Fiber Co., Ltd.; single fiber average diameter 4 μm, number of single fibers 66, number of twists 1.0Z, count 2.3 tex) was used as warp and weft. A plain weave glass fiber fabric having a warp density of 95/25 mm and a weft density of 95/25 mm was obtained by weaving with an air jet loom. Then, the spinning sizing agent and weaving sizing agent adhering to the obtained glass fiber fabric were removed by heating at 400° C. for 30 hours. After that, the glass fiber fabric was treated with a silane coupling agent (S-350: N-vinylbenzyl-aminoethyl-γ-aminopropyltrimethoxysilane (hydrochloride) Chisso Co., Ltd.) with a surface treatment agent adjusted to a concentration of 15 g / L. and squeezed with a padder roll, dried at 120° C. for 1 minute and cured. Then, the glass fiber fabric was widened once while the tension in the warp direction of the glass fiber fabric was set to 100 N/m by water flow processing at a pressure of 1.5 MPa to obtain a glass fiber cloth 3 (glass fiber fabric). The resulting glass fiber cloth 3 had a warp density of 95/25 mm, a weft density of 95/25 mm, a thickness of 15 μm, a mass of 17 g/m ² and a refractive index of 1.562. Two glass fiber cloths 3 were prepared. The glass fiber cloth 3 was used to measure the average single fiber diameter and the number of single fibers of the glass yarn.

(Preparation of curable resin solution used for forming curable resin layer 4)
The same curable resin solution as in Example 1 was prepared.

(Preparation of process film)
Two sheets of the same process film as in Example 1 were prepared.

(Preparation of intermediate sheet)
Using one sheet of the process film, one sheet of the thermoplastic resin film 2, and one sheet of the glass fiber cloth 3, the process film/glass fiber cloth 3 was prepared in the same manner as in Example 1. An intermediate sheet having a layer structure of curable resin layer 4/thermoplastic resin film 2 contained in an impregnated state was obtained.

(Manufacturing of sheets for smoke-proof hanging walls)
Using one intermediate sheet, one process film, and one glass fiber cloth 3, the layer structure shown in FIG. A smoke barrier having a layer structure consisting of a curable resin layer 4 impregnated with a fiber cloth 3/a thermoplastic resin film 2/a curable resin layer 4 impregnated with a glass fiber cloth 3). A wall sheet was produced. In the obtained sheet for smoke-proof hanging wall, the gaps between the glass fibers of the glass fiber cloth 3 are impregnated with the curable resin layer 4 (cured product of the resin composition). A curable resin layer 4 was formed on both surfaces.

3. Results The results are shown in Table 1. The sheets for smoke-proof hanging walls of Examples 1 to 4 are sheets for smoke-proof hanging walls in which curable resin layers 4 impregnated with glass fiber cloth are laminated on both sides of a thermoplastic resin film 2. The thickness of the thermoplastic resin film 2 is 90 to 130 μm, the mass of the sheet is 300 to 450 g/m ² , the tear strength is excellent, it is difficult to deform in the event of a fire, and it is flammable. It was difficult. In particular, the smoke barrier sheets for hanging walls of Examples 1 to 3 had a thermoplastic resin film thickness of 120 to 130 μm, so they were particularly excellent in tear strength and hardly deformed in the event of a fire. .

On the other hand, the sheet for smoke barrier hanging wall of Comparative Example 1 was inferior in tear strength because the thickness of the thermoplastic resin film 2 was less than 90 μm.

In addition, in the sheet for smoke-barrier hanging wall of Comparative Example 2, the thickness of the thermoplastic resin film 2 exceeded 130 μm. The wall sheet as a whole was deformed, easily deformed in the event of a fire, and easily combustible.

1 sheet for smoke-proof hanging wall 2 thermoplastic resin film 3 glass fiber cloth 4 curable resin layer

Claims (13)

a thermoplastic resin film;
a curable resin layer impregnated in a glass fiber cloth laminated on both sides of the thermoplastic resin film,
A smokeproof hanging wall sheet, wherein the thickness of the thermoplastic resin film is 90 to 130 μm, and the mass of the sheet is 300 to 450 g/m ² . The thermoplastic resin film has a thickness of 120 to 130 μm,
2. The smoke barrier sheet according to claim 1, wherein said sheet has a mass of 350 to 430 g/m ² . 3. The sheet for a smoke-proof hanging wall according to claim 1, wherein the resin forming the curable resin layer is a photocurable resin. The sheet for smoke barrier hanging wall according to any one of claims 1 to 3, wherein the thermoplastic resin is polyethylene terephthalate. The sheet for a smoke barrier hanging wall according to any one of claims 1 to 4, wherein said curable resin layer has a bromine concentration of 5 to 30% by mass. The smokeproof hanging wall sheet according to any one of claims 1 to 5, which has a total light transmittance of 80% or more and a haze of 20% or less. The sheet for smoke barrier hanging walls according to any one of claims 1 to 6, which has a tear strength of 30 N or more. 8. The sheet for smoke-proof hanging walls according to claim 1, which has a surface resistivity of 5×10 ¹² Ω or less. The prevention according to any one of claims 1 to 8, wherein the total amount of heat generated for 20 minutes after the start of heating is 8 MJ/m ² or less when subjected to a heat generation test in which 50 kW/m ² of radiant heat is irradiated. Chimata wall sheet. Any one of claims 1 to 9, wherein the heat generation rate does not exceed 200 kW/m ² continuously for 10 seconds or more for 20 minutes after the start of heating when subjected to an exothermic test in which radiant heat of 50 kW/m ² is applied. Sheet for smoke-proof hanging wall described in paragraph. The sheet for a smoke-proof hanging wall according to any one of claims 1 to 10, wherein the smoke-proof hanging wall is a tension-type smoke-proof hanging wall. A smoke-proof hanging wall comprising the smoke-proof hanging wall sheet according to any one of claims 1 to 11. A method for manufacturing a sheet for smoke barriers according to any one of claims 1 to 11, comprising steps 1 and 2 below.
Step 1: An intermediate sheet A in which a thermoplastic resin film having a thickness of 90 to 130 μm is laminated on a curable resin layer impregnated in a glass fiber cloth, and a curable property for forming the curable resin layer. Preparing a resin solution B, a glass fiber cloth C, and a process film D;
Step 2: The glass fiber cloth C impregnated with the curable resin solution B is combined with the intermediate sheet A and the process film D, and the surface side of the thermoplastic resin film of the intermediate sheet A is the glass fiber A step 2 of obtaining a sheet having a mass of 300 to 450 g/m ² by sandwiching so as to face the cloth C side and curing the curable resin solution B in this state.

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