JP6091329B2 - Film material with excellent bending durability and flame resistance - Google Patents

Description

  The present invention relates to a film material excellent in bending durability and flame resistance. More specifically, it relates to a film material that has excellent durability against repeated bending, has translucency that can recognize the situation on the other side of the film material in the event of a fire, and has excellent flame resistance. The present invention relates to a film material that can be suitably used as a material constituting a fire-proof shutter or screen as fire-proof equipment installed in an opening of a building.

  In buildings such as shops and private houses in fire-prevention areas and semi-fire-prevention areas, prevent the spread of fire by preventing fire from the outside and preventing fire from entering the openings in areas that may spread. To do so, the use of “fire doors (fire prevention equipment)” is obligatory. For this reason, there are an increasing number of cases in which shutters made of metal slats are additionally installed outside or inside a sash of a private house or a show window of a store. However, since the metal shutter is heavy, it is necessary to reinforce the installation part, and also requires a large space. In addition, when the shutter is closed, it is difficult to recognize the situation behind the shutter, making it difficult to judge the exact situation in the event of a fire. There was a risk of encountering an unexpected accident. As a method for solving such a problem, a technique in which a fire-proof shutter is composed of a flame-resistant sheet has been proposed (see, for example, Patent Document 1). By using a flame-resistant sheet that is lighter and more flexible than a metal shutter, it is possible to reduce the burden of construction costs, and if there is a fire on the other side of the fire shutter, the sheet will permeate the flame. You can see the brightness and recognize the presence or absence of fire. However, in this example, since the woven fabric made of inorganic fibers is used as it is, the fibers are easily damaged by friction between the woven fabrics during winding and unwinding, and the durability is insufficient as a shutter for daily opening and closing. Met.

  There have been many attempts to improve the durability against friction by coating a resin on a woven fabric using inorganic fibers. However, coating with a flammable resin is disadvantageous in terms of flame resistance. Become. Therefore, a film material using a highly heat-resistant PTFE resin as a coating resin has been proposed (for example, Patent Document 2). However, since PTFE resin is very hard, the resulting film material is rigid and inferior in handleability, and cannot be rolled up compactly. May occur. In order to give flame resistance by using a softer resin than PTFE resin, it is conceivable to add a large amount of flameproofing agent or inorganic filler to the resin, and in this case, flameproofing agent or inorganic filler The coating layer becomes hard due to containing a large amount of the film, and the flexibility of the film material cannot be obtained, and the strength of the resin is lowered and the appearance is easily damaged due to friction at the time of opening and closing. If the hardness of the inorganic filler contained in the impregnated resin is high, there is a problem that the strength of the film material is reduced by damaging the inorganic fiber each time the film is wound or unwound. Further, the inclusion of a large amount of flameproofing agent and inorganic filler also leads to an increase in concealment, and there is a problem that it is difficult to recognize the situation beyond the shutter when the shutter is closed. In addition, addition of thermally expandable graphite to the resin is effective for imparting flame resistance (see, for example, Patent Document 3), but the flexibility of the film material is the same as when a large amount of flameproofing agent or inorganic filler is added. Cannot be obtained, and there is a problem of increasing concealment.

  As mentioned above, it has translucency that can recognize the situation on the other side of the membrane material in the event of a fire, is flexible, has excellent durability against repeated bending, has excellent flame resistance, and has an opening in a building. A film material that can be used as a fire-proof shutter or a material constituting a screen has not been proposed so far.

Japanese Utility Model Publication No. 57-204392 JP 2002-12678 A JP-A-10-95887

  The present invention has a light-transmitting property capable of recognizing the situation on the other side of the membrane material in the event of a fire, is excellent in durability against repeated bending, satisfies fire resistance standards, and is installed in an opening of a building. An object of the present invention is to provide a flame resistant film material that can be used for the above.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has secured the adhesion between the base fabric and the resin while suppressing the impregnation of the resin forming the flame-retardant resin coating layer into the base fabric. In order to complete the present invention, it is possible to obtain a film material having high bending durability, and that the flame-retardant resin coating layer includes heat ray reflective particles, thereby improving flame resistance. It came.

  That is, the film material excellent in bending durability and flame resistance of the present invention is a flexible film material in which a flame-retardant resin coating layer is formed on both surfaces of a glass cloth base fabric, and the glass cloth base material The entire cloth is oil-repellent treated with a fluorine-based compound, and the flame-retardant resin coating layer is formed of a coated cured product of a soft polyvinyl chloride resin composition containing a reactive urethane resin and heat ray reflective particles. And 3-10% by mass of the reactive urethane resin and 1-10% by mass of the heat ray reflective particles with respect to the flame retardant resin coating layer, respectively, and visible light transmittance (JIS) of the flexible film material. Z8722) is 15 to 55%.

  In the film material excellent in bending durability and flame resistance of the present invention, the reactive urethane resin is selected from one-component curable urethane resin or two-component curable urethane resin, or two or more types. It is preferable that

  In the film material excellent in bending durability and flame resistance of the present invention, the heat ray reflective particles may be flaky interference mica particles having at least one reflection peak in an infrared region having a wavelength of 800 nm to 2500 nm. preferable.

In the membrane material excellent in bending durability and flame resistance of the present invention, the glass cloth base fabric is a woven fabric formed by weaving glass multifilament yarns, and has a mass of 90 to 400 g / m ² and voids. It is preferable to have a rate of 0-5%.

  In the film material excellent in bending durability and flame resistance of the present invention, the mass ratio of the glass cloth base fabric to the flame retardant resin coating layer is 1: 0.25 to 1: 3. preferable.

  According to the present invention, it is possible to provide a membrane material that is excellent in durability against repeated bending, has translucency capable of recognizing the situation on the other side of the membrane material in the event of a fire, and has excellent flame resistance. it can. The shutter and screen composed of the film material of the present invention can be suitably used as a fire prevention facility installed alone in an opening of a building where there is a risk of fire spread, or attached to a window that does not meet fire resistance standards. .

Sectional drawing which shows an example of a structure of the member excellent in bending durability and flame resistance of this invention

  The film material of the present invention is a flexible film material in which a flame retardant resin coating layer is formed on both surfaces of a glass cloth base fabric, and includes heat ray reflective particles in the flame retardant resin coating layer. Even if it does not contain a large amount of flame retardants or inorganic fillers, it suppresses the upper layer temperature of the film material in the event of a fire, and causes flames on the surface opposite to the surface exposed to the flame or the other side It is possible to prevent the flame from being blown out (permeated), to delay the flame for a certain period of time, and to suppress heat generation during combustion. In addition, since the entire glass cloth base fabric is oil-repellent treated with a fluorine compound, particles such as heat ray reflective particles and inorganic filler contained in the flame retardant resin coating layer composition are contained inside the glass cloth. It is possible to prevent the strength from being deteriorated due to fiber damage by suppressing the penetration of the fiber. By including an adhesive reactive urethane resin in the flame retardant resin coating layer, the glass cloth base fabric and flame retardant It can prevent that the adhesiveness of a resin coating layer falls by an oil-repellent process. Furthermore, since the film material for fire prevention equipment of the present invention has translucency that can recognize the situation on the other side of the film material in the event of a fire, evacuation can be made by accurate judgment.

  The flame retardant resin coating layer of the present invention is formed by a coated cured product of a soft vinyl chloride resin composition containing a reactive urethane resin and heat ray reflective particles as essential components.

  In the present invention, as the reactive urethane resin, it is preferable to use one type selected from one-component curable urethane resin or two-component curable urethane resin alone or in combination of two or more types. The reactive urethane resin is contained in an amount of 3 to 10% by mass with respect to the flame-retardant resin coating layer. By including the reactive urethane resin in this range, even if the entire glass cloth base fabric is oil-repellent treated with a fluorine-based compound, the adhesiveness between the base fabric and the resin layer is ensured and subjected to repeated bending. However, it is possible to make it difficult for the flame-retardant resin coating layer to float or peel off. If the reactive urethane resin contained in the flame retardant resin coating layer is less than 3 parts by mass, sufficient adhesion between the base fabric and the resin layer may not be obtained. Peeling may occur, and the glass cloth base fabric may be directly bent and damaged, resulting in a decrease in durability of the film material. Even if the reactive urethane resin is added in excess of 10 parts by mass, the adhesion is not improved any more, and the flame-retardant resin coating layer is hardened, resulting in a rigid film material, resulting in poor handling. During winding and unwinding when used as a fire shutter, the film material and the case inner wall or the film material rub against each other in the entraining case, and the surface of the film material and the woven fabric may be damaged, and the appearance may be damaged. The glass cloth base fabric may be damaged to cause problems such as a decrease in durability of the membrane material.

  In the present invention, the one-component curable urethane resin used for the reactive urethane resin is one in which a polyisocyanate and a polyol are reacted, all hydroxyl groups of the polyol are urethane-bonded to leave an isocyanate group, and the remaining isocyanate group Reacts with moisture in the air, and the isocyanate groups bond (urea bonds) to cure. Examples of the polyisocyanate used in the urethane prepolymer include aliphatic polyisocyanates, alicyclic polyisocyanates, araliphatic polyisocyanates, aromatic polyisocyanates, modified products of these polyisocyanates, and silicon-containing polyisocyanates. Polyols include polyoxyalkylene polyols, polyester polyols, polyolefin polyols, acrylic polyols, castor oil-based polyols, and polymer polyols obtained by polymerizing ethylenically unsaturated monomers in these polyols. Illustrated.

  In the present invention, the two-component curable urethane resin used for the reactive urethane resin includes a polyol component and an isocyanate group-containing compound, and by mixing these, the hydroxyl group of the polyol and the isocyanate group react to cure. To do. Examples of the polyol component used in the two-component curable urethane-based resin include polyester polyol, polyether polyol, polycarbonate polyol, polycaprolactone polyol, and acrylic polyol. Examples of the isocyanate group-containing compound include TDI (tolylene diisocyanate), Conventionally known diisocyanate compounds such as MDI (diphenylmethane diisocyanate), XDI (xylylene diisocyanate), IPDI (isophorone diisocyanate), HDI (hexamethylene diisocyanate), and the like, after reacting these diisocyanates with polyols Examples thereof include polyisocyanate in which a group remains and isocyanate trimer (isocyanurate type).

In this invention, 1-10 mass% of heat ray reflective particles are contained with respect to a flame-retardant resin coating layer. By including heat-reflective particles in this range, even if it does not contain a large amount of flameproofing agent or inorganic filler, it reflects the heat rays (infrared rays) emitted from the flame, and the upper layer temperature of the film material in the event of a fire Suppresses flames, prevents flames on the opposite side of the surface exposed to the flame, damages the glass cloth base fabric due to heat, and delays the ejection (permeation) of the flame to the opposite side . As a result, the standards pertaining to the certification of Article 2-9 of the Building Standards Act (Fireproofing Facilities stipulated by fireproof doors and other government ordinances), that is, the standard in conformity with ISO834 for one side of the membrane material When heating is performed according to the heating curve, after 20 minutes, (1) there is no jet of flame on the non-heated surface, (2) no flame that continues for more than 10 seconds on the non-heated surface, (3) It is possible to obtain a film material that satisfies the condition that it does not generate cracks and other cracks through which a flame passes and does not generate a gap, and is also compatible with a combustion test by the ASTM-E1354 cone calorimeter test method. If the heat ray reflective particles contained in the flame retardant resin coating layer are less than 1 part by mass, the effect of suppressing the temperature upper layer of the film material may not be sufficiently obtained, and the heat ray reflective particles exceed 10 parts by mass. When the flame retardant resin coating layer becomes hard, the handling of the film material may be inferior, the bending durability may be impaired, and a visible light transmittance of 15% or more (JIS Z8722) cannot be obtained. Sometimes. As the heat ray reflective particles, flaky interference mica particles having at least one reflection peak in the infrared region having a wavelength of 800 nm to 2500 nm, and metal oxide particles having a weight average particle diameter of 0.5 to 1.6 ( For example, one or more selected from titanium oxide, zinc oxide (ZnO), tin oxide, zirconium oxide, indium oxide (In ₂ O ₃ ), tin-doped indium oxide, indium-doped tin oxide, antimony-doped tin oxide, etc. Can be used. It is said that the combustion temperature at the time of fire reaches 1200 ° C., and the heat emitted from the flame is emitted as infrared rays (heat rays), but the heat ray reflective particles of the present invention reflect the heat rays (infrared rays exceeding 780 nm), In order to selectively transmit light in the visible region (380 to 780 nm), the visible light transmittance of the film material is not reduced so much, and when there is a fire on the other side of the film material, the film material passes through the flame. It is possible to recognize whether there is a fire by visually recognizing the warmth, and to prevent the spread of fire by reflecting the heat rays. In the present invention, among these particles, flaky interference mica particles having at least one reflection peak in the infrared region with a wavelength of 800 nm to 2500 nm have a small decrease in visible light transmittance, the mica hardness ( Since the Mohs hardness 2-3) is lower than the hardness of the glass (Mohs hardness 5), the glass cloth base fabric is less likely to be damaged, and the flakes are less likely to cause pinholes in the flame-retardant resin coating layer. From the above, it is particularly preferably used. Examples of such interference mica particles include a single-layer thin film made of a metal oxide selected from titanium oxide, tin oxide, and zirconium oxide, or a mixture of titanium oxide / silicon oxide / titanium oxide. Examples of flaky mica particles covered with a multilayer thin film consisting of three layers can be exemplified, and the particle size (width and length in the plane direction, not in the thickness direction of the flakes) is 5 to 60 μm. It is preferable.

  The polyvinyl chloride resin used in the present invention is a paste vinyl chloride resin having a number average molecular weight P obtained by emulsion polymerization of P = 700 to 3800, preferably 1000 to 2000, and a vinyl chloride-ethylene copolymer resin, chloride Vinyl chloride copolymer resins such as vinyl-vinyl acetate copolymer resins, vinyl chloride-vinylidene chloride copolymer resins, vinyl chloride-acrylic acid copolymer resins, and vinyl chloride-urethane copolymer resins (copolymerization components) 2-30 mass%). In the present invention, the soft polyvinyl chloride resin composition includes the above-described polyvinyl chloride resin, reactive urethane resin, and heat ray reflective particles, and further as an oil-repellent treatment as a paste sol to which a plasticizer is further added. The glass cloth base fabric is subjected to dipping or coating on both sides and heated and cured at 160 to 200 ° C. to form a flame retardant resin coating layer. The adhesion amount of the flame retardant resin coating layer is a mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) and the flame retardant resin coating layer, and may be 1: 0.25 to 1: 3. preferable. When the mass ratio of the flame retardant resin coating layer to the glass cloth base fabric is less than 1: 0.25, the glass cloth base fabric is easily damaged by friction during unwinding and winding, and the bending durability of the obtained film material When the ratio exceeds 1: 3, it is easy to generate a flame in half-facing with the side exposed to the flame in the event of a fire, and the ability to prevent the spread of fire may be insufficient. In the combustion test by the ASTM-E1354 corn calorimeter test method, the total calorific value and the heat generation rate may exceed the standard.

  The plasticizer used in the soft polyvinyl chloride resin composition is not particularly limited, and includes a phthalate ester plasticizer, a cyclohexanedicarboxylic ester plasticizer, a fatty acid ester plasticizer, a polyester plasticizer, and a citrate ester plasticizer. A sulfonate ester plasticizer, an epoxy plasticizer, a phosphate ester plasticizer, a chlorinated paraffin plasticizer, and the like can be appropriately selected from conventionally known plasticizers for vinyl chloride resins. As long as the object of the present invention is not impaired, the soft polyvinyl chloride resin composition includes a stabilizer, a flame retardant, a filler, an ultraviolet absorber, an antioxidant, an antistatic agent, an antibacterial agent, Anti-mold agents, colorants (organic pigments, inorganic pigments, dyes), fluorescent brighteners, fluorescent pigments, phosphorescent pigments, wetting agents, dispersants, organic solvents for dilution, and the like may also be included.

The glass cloth base fabric of the present invention is a woven or knitted fabric made of glass fiber yarns. When using a woven fabric, weaving by inserting wefts orthogonal to the warp arranged in parallel in the length direction, weaving, such as plain weave, twill weave, satin weave, silk weave, woven weave, in parallel The warps and wefts arranged side by side are stacked so as to be orthogonal to each other, and these can be appropriately selected from woven fabrics such as a woven fabric formed by pressing them with the entangled yarn. In the case of using a knitted fabric, a weft insertion tricot knitted fabric is preferably used among the warp knitted knitted fabrics in which yarns warped in the warp direction are entangled with loops. These knitted fabrics are preferably non-coarse knitted fabrics having a porosity of 0 to 5%, more preferably 0 to 3%, and substantially no gaps formed between the yarns. When the porosity exceeds 5%, even if the flame retardant resin coating layer is formed, holes penetrating on the front and back of the film material may remain. In the event of a fire, a flame may be ejected (permeated) from this hole, and even if the hole does not remain and the void is covered with a flame-retardant resin, the part that does not contain glass fiber yarn will burn out in the event of a fire. It is easy, and a flame may be ejected (permeated) from the burned-out hole. The mass of the glass cloth made base fabric of the present invention is preferably from 90~400g / ^{m 2,} and more preferably 100~350g / ^{m 2.} When the mass of the glass cloth base fabric is less than 90 g / m ² , the strength of the obtained film material is insufficient, and durability against repeated winding and unwinding may be insufficient. When the mass of the glass cloth base fabric exceeds 400 g / m ² , the obtained film material becomes rigid and the handleability deteriorates, and the film materials rub against each other during winding and feeding, and the surface of the film material and the woven fabric The cloth may be damaged, resulting in problems such as the appearance being deteriorated and the strength of the film material being lowered.

  There is no particular limitation on the vitreous that forms the glass fiber yarn used for the glass cloth base fabric of the present invention, and glass such as E (non-alkali) glass, C (alkali-containing) glass, S glass, and D glass is conventionally used. It can be appropriately selected from known glass compositions used for fibers. As the form of the glass fiber yarn, a glass multifilament yarn of 100 to 2000 dtex (decitex) is preferably used, and 200 to 1500 dtex is more preferable. The diameter of each filament single yarn constituting the glass multifilament yarn is preferably 1 μm to 15 μm, and particularly preferably 5 μm to 10 μm in order to obtain a flexible membrane material.

In the present invention, the glass cloth base fabric needs to be oil-repellent treated with a fluorine-based compound as a whole. By using a fluorine-based compound, the surface energy of each single yarn of the glass fiber yarn constituting the glass cloth is lowered to exhibit oil repellency, and the soft polyvinyl chloride inside the glass fiber yarn during resin coating processing The penetration of the resin composition paste sol is suppressed. As a result, particulate additives such as heat ray reflective particles and inorganic fillers contained in the flame retardant resin coating layer may enter the inside of the glass fiber yarn and damage the fiber directly, or there may be foreign matter inside. The bending durability can be improved by preventing the fiber yarn from being damaged due to partial strong stress during bending. Further, since the heat ray reflective particles do not enter the inside of the base fabric, it is possible to effectively reflect the heat rays that reach the base fabric in the event of a fire, which is advantageous in terms of flame resistance. When treated with a so-called water-repellent treatment agent such as paraffin or silicone, or when oil-repellent treatment is not performed, the penetration of the processing liquid into the glass cloth becomes insufficient, and the bending durability of the membrane material is impaired. There are times. In addition, in a glass cloth base fabric that is not treated with oil repellency, when the paste sol for forming the flame-retardant resin coating layer contains a diluent solvent for adjusting viscosity, only the diluent solvent is first applied when the processing solution is touched. Infiltrating into the glass cloth base fabric, the liquid viscosity around the base fabric becomes non-uniform. As a result, a uniform coating layer is not formed, and the appearance of the film material may be impaired. The adhesion amount of the fluorine-based compound to the glass cloth base fabric needs to be appropriately adjusted depending on the type of the treatment agent used, but is 0.3 to 1.0% by mass with respect to the mass of the glass cloth base fabric. It is preferable. As the fluorine-based compound used in the oil-repellent treatment, any fluorine-based compound that is usually used as an oil-repellent treating agent can be used without limitation, but in particular, PFOA (perfluorooctane) that has a concern about toxicity to the human body. Acid), PFOS (perfluorooctane sulphonic acid), long chain PFCAs (perfluorocarboxylic acid having more carbon atoms than PFOA) and the like are preferred, and a high-performance liquid chromatograph-mass spectrometer is preferred. A compound having a detection limit value of 5 ppb or less as measured is more preferable. Such a compound was selected from the group consisting of (a) a C 1-6 perfluoroalkyl group, or —C ₃ F ₆ O—, —C ₂ F ₄ O—, and —CF ₂ O—. A polymerizable monomer having a fluoroether group having at least one repeating unit and having a carbon-carbon double bond (for example, perfluoroalkyl acrylate, perfluoroalkyl methacrylate, perfluoropolyether acrylate, etc.), a homopolymer composed of any one of b) a polymerizable monomer having a C 1-6 perfluoroalkenyl group and (c) a fluorine-containing silsesquioxane monomer having a polymerizable group, A copolymer containing two or more of these monomers, or a polymerizable monomer that can be copolymerized with these monomers and does not have a fluorine atom (for example, an alkylacrylate). And a copolymer with a polymerizable monomer having a carbon-carbon double bond such as a rate, a vinyl ester, a vinyl ether, an α-olefin, a chlorine-containing unsaturated monomer, and the like.

  In the present invention, there is no particular limitation on the method of applying an oil repellent treatment to the entire glass cloth base fabric, for example, using a treatment liquid in which the above-mentioned fluorine-based compound is dissolved or dispersed in water or an organic solvent, A method of applying a treatment liquid to the entire glass cloth base by the pad / dry method, the pad / steam method, the pad / dry / steam method, the gravure coating method, the spray method, and the like, followed by drying at 60 to 200 ° C. Illustrated. In addition to the fluorine compounds described above, the treatment liquid has fluorine atoms such as paraffin compounds, aliphatic amide compounds, alkylethylene urea compounds, silicone compounds, etc., as long as the object of the present invention is not impaired. In addition, cross-linking agents (isocyanate-based, melamine-based, carbodiimide-based, oxazoline-based, etc.), silane coupling agents, binders (resin components), epoxy curing agents In addition, conventionally known additives such as a curing catalyst, a surfactant, a penetrating agent, an antifoaming agent, an antistatic agent, and a film forming aid may be included.

The film material excellent in bending durability and flame resistance of the present invention has a visible light transmittance of 15 to 55% (JIS
Z8722), and more preferably 20 to 50%. If the visible light transmittance is less than 15%, it may not be possible to accurately recognize the situation on the other side of the membrane material in the event of a fire. Not aware of the occurrence of a fire and may lead to delayed evacuation. On the other hand, in the present invention, it is difficult to obtain a film material having a visible light transmittance exceeding 55%.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited to these.

The film materials obtained in Examples and Comparative Examples were evaluated as follows.
1. In accordance with the performance evaluation method related to the certification of Article 2-9 of the Building Standards Act (Fireproof Doors and other fire prevention equipment specified by Cabinet Order) for the film materials created in Examples and Comparative Examples of Flame Resistance Performance The flame resistance was evaluated. However, the size of the membrane material used for the test was 200 cm wide × 100 m high, and the width 190
Standard specification peripheral wall with an opening of cm x 90 cm in height (thickness 12.5 m for wooden shaft construction method)
Standard heating curve in accordance with ISO834, fixed to the inside of the opening (heating side) of the m gypsum board with a steel frame (frame width 5 cm) for fixing the sample. The following items were evaluated and judged as follows at 20 minutes (heating temperature 781 ° C.) and 30 minutes (heating temperature 842 ° C.), respectively.
(1) Flame ejection to the non-heating surface A1: No flame ejection to the non-heating side A2: Flame ejection to the non-heating side was within 10 seconds B: 10 to the non-heating side There was a fire eruption that continued for more than 2 seconds. * Judgment: A1 and A2 were compliant, B was irrelevant. (2) Presence or absence of flames on the non-heated surface A1: No flaming occurred on the non-heated side A2: Flame was generated on the non-heated side, but it was within 10 seconds B: Flame was generated on the non-heated side for more than 10 seconds * Judgment: A1 and A2 were compliant, B was not compliant (3) The presence of cracks and other cracks and gaps through which the flame passes A: Does not generate cracks and other cracks through which the flame passes B: The crack and other cracks through which the flame passes and the gap occurs * Judgment: A And made B non-conforming
2. Combustion test (ASTM-E1354: Corn calorimeter test method)
The film materials obtained in the examples and comparative examples were subjected to exothermic tests in which a radiant heat of 50 kW / m ^{2 was applied} by a radiant electric heater for 20 minutes, and the total calorific value and heat generation rate for 20 minutes were measured. The appearance of the film material after the test was observed and judged as follows. (Everything is A,
B is considered nonconforming)
(1) Total calorific value A: 8 MJ / m ² or less B: Exceeds 8 MJ / m ² (2) Heat generation rate A: Continues for 10 seconds or more and does not exceed 200 kW / m ² B: Continues for 10 seconds or more 200 kW / ^{m 2} was exceeded (3) external observation a: no pinholes depressed scars of more than 0.5mm diameter B: pinhole depressed mark is generated in excess of 0.5mm diameter
3. Bending durability
According to JISP8115 paper and board fold strength test method by MIT type tester,
The test piece was repeatedly reciprocated with a load of 9.8 N applied, and the number of times of bending when the film material was broken (one reciprocation was recorded once) was recorded. In addition, the test was performed on each of the five specimens in both the longitudinal (longitudinal) direction and the lateral (weft) direction of the film material, and the average number of times of the longitudinal and lateral directions was taken.
The value was evaluated as follows.
A1: The film material is 30000 times or more in both length and width and is excellent in bending durability. A2: Either one or both of the length and width is less than 30,000 times, but both length and width are 20000.
It is a film material that has a bending durability.
B: Either longitudinal or lateral or both are less than 20000 times, and the film material is inferior in bending durability. * Judgment: A1 and A2 are qualified, and B is not
4. Visible light transmittance The visible light transmittance of the film materials obtained in Examples and Comparative Examples was measured according to JISZ 8722 using a spectroscopic colorimeter CM-3600d (manufactured by Konica Minolta Co., Ltd.).

[Example 1]
<Base fabric>
1350 dtex glass (E glass) multifilament (filament single yarn diameter 6
(μm) A plain woven fabric (weaving density: 29 warps / inch × 32 wefts / inch) used for warp and weft yarns, a glass cloth base fabric 1 (mass 340 g / m ² , porosity 0%) ).
<Oil repellent treatment>
The glass cloth base fabric 1 was dipped in a fluorine-based compound-containing oil repellent treatment composition of the following formulation 1 and pulled up and simultaneously pressed with a mangle roll to completely impregnate the base fabric with the oil repellent treatment composition. Subsequently, it heated at 140 degreeC * 1 minute in oven, and obtained the glass fiber base fabric by which the whole was oil-repellent-treated with the fluorine-type compound. (Adhesion amount: 0.5% by weight based on the weight of 1.7 g ^{/ m} _{2 · · ·} glass cloth made base fabric on solids)
(Formulation 1) Fluorine-based compound oil-repellent treatment composition Fluorine-based oil-repellent treatment agent 5 parts by mass (manufactured by Asahi Glass Co., Ltd .: trade name “Asahi Guard E-300D”)
95 parts by weight of water <Formation of flame retardant resin coating layer>
The base cloth made of glass cloth treated with oil repellency is immersed in a paste sol made of a soft polyvinyl chloride resin composition having the following composition 2, pulled up and simultaneously pressed with a mangle roll, and then heated in an oven at 190 ° C. for 1 minute. Thus, the film material of Example 1 having a flame retardant resin coating layer of 100 g / m ² on both surfaces was obtained on the oil-repellent glass cloth base fabric. In Formulation 2, a two-component curable urethane resin comprising polyester polyol and isocyanurated HDI was used as the reactive urethane resin, and flaky interference mica particles having a reflection peak at a wavelength of 900 nm were used as the heat ray reflective particles. . The obtained film material contains 4.7% by mass of a reactive urethane resin and 3.1% by mass of heat ray reflective particles with respect to the flame-retardant resin coating layer, and the mass of the glass cloth base fabric ( The mass ratio between the oil repellent treatment and the flame retardant resin coating layer was 1: 0.29. The results of subjecting this membrane material to various tests are shown in Table 1.
(Formulation 2) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass 10 parts by mass of antimony trioxide (flame retardant particles) 6 parts by mass of flake-like interference mica particles having a reflection peak at a wavelength of 900 nm (Merck, Inc., trade name “Solar Flare 870”)
Polyester polyol (solid content: 100%) 6 parts by mass (Nippon Polyurethane Industry Co., Ltd .: trade name “Nipporan 1004”)
3 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

[Example 2]
A film material of Example 2 was obtained in the same manner as in Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of the following Formulation 3 instead of Formulation 2. In Formulation 3, titanium oxide particles (rutile type) having a weight average particle diameter of 1.0 μm were used as heat ray reflective particles instead of the interference mica particles. The mass of the flame retardant resin coating layer of the obtained film material is 105 g / m ^{2 on} both sides (the mass ratio between the mass of the glass cloth base fabric (before the oil-repellent treatment) and the flame retardant resin coating layer is 1). : 0.31). The flame retardant resin coating layer contained 4.6% by mass of reactive urethane resin and 5.1% by mass of heat ray reflective particles. The results of subjecting this membrane material to various tests are shown in Table 1.
(Formulation 3) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass Antimony trioxide (flame retardant particles) 10 parts by weight Titanium oxide particles having a weight average particle diameter of 1.0 μm (rutile type) 10 parts by weight Polyester polyol (solid content 100%) 6 parts by weight (manufactured by Nippon Polyurethane Industry Co., Ltd .: Product name “Nipporan 1004”)
3 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

[Example 3]
A film material of Example 3 was obtained in the same manner as in Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of the following composition 4 instead of the composition 2. In Formula 4, the interference mica particles used in Formula 2 and the titanium oxide particles (rutile type) used in Formula 3 were used in combination as heat ray reflective particles. The mass of the flame retardant resin coating layer of the obtained film material is 105 g / m ^{2 on} both sides (the mass ratio between the mass of the glass cloth base fabric (before the oil-repellent treatment) and the flame retardant resin coating layer is 1). : 0.31). 4.5 mass% of reactive urethane resins and 4.0 mass% of heat ray reflective particles were contained with respect to the flame-retardant resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 1.
(Formulation 4) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass 10 parts by mass of antimony trioxide (flame retardant particles) 3 parts by mass of flake-like interference mica particles having a reflection peak at a wavelength of 900 nm (Merck, Inc., trade name “Solar Flare 870”)
Titanium oxide particles having a weight average particle size of 1.0 μm (rutile type) 5 parts by mass Polyester polyol (solid content 100%) 6 parts by mass (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Nipporan 1004”)
3 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

[Example 4]
A film material of Example 4 was obtained in the same manner as in Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of the following composition 5 instead of the composition 2. In Formulation 5, instead of the two-component curable urethane resin, a one-component curable urethane resin composed of a urethane prepolymer having an isocyanate terminal was used. The mass of the flame retardant resin coating layer of the obtained film material is 100 g / m ^{2 in} both sides (mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) and the flame retardant resin coating layer 1: 0. .29), 5.2% by mass of reactive urethane resin and 3.1% by mass of heat ray reflective particles were contained in the flame-retardant resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 1.
(Formulation 5) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass 10 parts by mass of antimony trioxide (flame retardant particles) 6 parts by mass of flake-like interference mica particles having a reflection peak at a wavelength of 900 nm (Merck, Inc., trade name “Solar Flare 870”)
1 part curable urethane prepolymer (solid content 100%) 10 parts by mass (made by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate 2011”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

[Example 5]
Plain woven fabric (woven density: 32 warps / inch × weft 32) using 375 dtex glass (E glass) multifilament (filament single yarn diameter 9 μm) as warp and weft instead of glass cloth base fabric 1 The same as in Example 1, except that a glass cloth base fabric 2 composed of a book / inch, a mass of 100 g / m ² , and a porosity of 2.5% was used, and the dilution solvent of Formulation 2 was changed to 5 parts by mass. The film material of Example 5 was obtained. The amount of the oil repellent treatment agent attached to the glass cloth base fabric 2 is 1.7 g / m ^{2 in} solid content (0.5% by mass with respect to the mass of the glass cloth base fabric). The mass of the flame-retardant resin coating layer is 110 g / m ^{2 on} both sides (mass ratio 1: 1.1 of the mass of the glass cloth base fabric (before the oil-repellent treatment) and the flame-retardant resin coating layer), The reactive urethane resin was contained by 4.7% by mass and the heat ray reflective particles were contained by 3.1% by mass with respect to the flammable resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 1.

[Example 6]
A film material of Example 6 was obtained in the same manner as Example 5 except that Formulation 3 was used instead of Formulation 2 and the diluent solvent of Formulation 3 was changed to 5 parts by mass. The amount of the oil repellent treatment agent attached to the glass cloth base fabric 2 is 1.7 g / m ^{2 in} solid content (0.5% by mass with respect to the mass of the glass cloth base fabric). The mass of the flame retardant resin coating layer is 117 g / m ^{2 on} both sides (mass ratio of the mass of the glass cloth base fabric (before the oil-repellent treatment) and the flame retardant resin coating layer is 1: 1.2), The reactive urethane resin was contained by 4.7% by mass and the heat ray reflective particles were contained by 3.1% by mass with respect to the flammable resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 1.

  The film materials of Examples 1 to 6 are film materials that satisfy all the requirements of the present invention, are suitable for all items of flame resistance performance and combustion test, and are excellent in flame resistance that can be used for fire prevention equipment. Met. In addition, since all of the film materials of Examples 1 to 6 have bending durability of 20,000 times or more for reciprocal bending, they can be used suitably for shutters and screens that are repeatedly wound and unwound, and further visible light. Since the transmittance is 15 or more, even if the shutter or screen using this membrane material is closed, it is possible to recognize the fire that occurred on the other side of the membrane material, which is very useful for disaster prevention Met. In comparison between Example 1 and Examples 2 and 3, the flex resistance of Example 1 was superior to that of Examples 2 and 3, but this was due to the oxidation used as heat ray reflective particles in Examples 2 and 3. This is presumably because the titanium particles have a high hardness (Mohs hardness 7.0 to 7.5), and the surface of the glass multifilament yarn was damaged during repeated bending. However, since the entire glass cloth base fabric is treated with an oil repellent treatment with a fluorine-based compound, heat ray reflective particles do not enter the glass multifilament yarn, providing practically sufficient bending durability. Had. Examples 1 and 4 differ from the reactive urethane resin contained in the flame-retardant resin coating layer, and Example 1 is a two-component curable urethane resin containing a polyol component and an isocyanate group-containing compound. 4 was a one-component curable urethane resin composed of a urethane prepolymer having an isocyanate terminal, but there was no difference in the evaluation results, and it was confirmed that both were suitable for the present invention. In Example 5, the glass cloth base fabric used was lighter than Example 1, the mass of the flame retardant resin coating layer of the same composition was about the same, and the flame retardant resin coating layer of the glass cloth base fabric Although there were many mass ratios, the evaluation criteria of the flame resistance after heating for 30 minutes differed slightly, but the evaluation criteria were met. In Example 6, the mass ratio of the flame-retardant resin coating layer to the glass cloth base fabric was also larger than that of Example 2 having the same composition, so there was a slight difference in the evaluation of the flame resistance performance after heating for 30 minutes. Although it came out, it met the evaluation criteria.

[Comparative Example 1]
A film material of Comparative Example 1 was obtained in the same manner as Example 1 except that the oil repellent treatment was omitted. The mass of the flame retardant resin coating layer of the obtained film material is 160 g / m ^{2 on} both sides (mass ratio of the mass of the glass cloth base fabric to the flame retardant resin coating layer is 1: 0.47), The reactive urethane resin was contained by 4.7% by mass and the heat ray reflective particles were contained by 3.1% by mass with respect to the flammable resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 2.

  The film material of Comparative Example 1 is a film material that does not adhere to the flame-retardant resin coating layer, has a poor appearance, has inadequate bending durability, and is not suitable for a shutter or screen that is repeatedly wound and unwound. It was. Moreover, it was a film material which had non-conformity evaluation in flame resistance performance and combustion performance and could not be used for fire prevention equipment. As for the appearance, because the glass cloth base fabric was not treated with oil repellency, the liquid solvent around the base cloth was uneven because the diluted solvent penetrated the moment the glass cloth base fabric touched the processing liquid. This is considered to be the cause. Regarding the bending durability, when the flame retardant resin coating layer was formed, heat ray reflective particles and flame retardant particles entered the glass multifilament yarn, and when subjected to repeated bending, a large amount of stress was applied, In addition, in the non-uniform flame retardant resin coating layer, it is considered that the thickness is partially different and a large stress is applied to the portions having different thicknesses.

[Comparative Example 2]
A film material of Comparative Example 2 was obtained in the same manner as Example 2 except that the oil repellent treatment was omitted. The mass of the flame retardant resin coating layer of the obtained film material is 165 g / m ^{2 in} both sides (mass ratio of the mass of the glass cloth base fabric to the flame retardant resin coating layer is 1: 0.49), difficult. 4.5 mass% of reactive urethane resin and 5.1 mass% of heat ray reflective particles were contained with respect to the flammable resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 2.

  Similarly to Comparative Example 1, the film material of Comparative Example 2 was not subjected to an oil repellency treatment on the glass cloth base fabric, so that the flame-retardant resin coating layer was unevenly adhered, the appearance was poor, and the bending durability was incompatible. Therefore, the film material is not suitable for a shutter or screen that is repeatedly wound and unwound. Moreover, it was a film material which had non-conformity evaluation in flame resistance performance and combustion performance and could not be used for fire prevention equipment. In Comparative Example 2, cracks occurred in the flame resistance evaluation (30 minutes), which was inferior to Comparative Example 1. This is presumably because the titanium oxide particles used as the heat ray reflective particles have a higher hardness than glass, which penetrates into the glass multifilament yarn and damages the fibers.

[Comparative Example 3]
A film material of Comparative Example 3 was obtained in the same manner as in Example 1 except that the paraffinic water repellent composition of the following Formulation 6 was used instead of the fluorine compound oil repellent composition of Formulation 1. The adhesion amount of the paraffin-based water repellent treatment to the glass cloth base fabric is 1.6 g / m ^{2 in} solid content ₍ 0.5% by mass with respect to the mass of the glass cloth base fabric), and the flame retardant of the obtained film material The weight of the resin coating layer is 120 g / m ^{2 on} both sides (mass ratio of the glass cloth base fabric (before water repellent treatment) and the flame retardant resin coating layer is 1: 0.35), flame retardancy The reactive urethane resin was contained by 4.7% by mass and the heat ray reflective particles were contained by 3.1% by mass with respect to the resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 2.
(Formulation 6) Water repellent composition 8 parts by weight of paraffinic water repellent (Ohara Palladium Co., Ltd .: trade name “Palladium NT”)
92 parts by weight of water

  The film material of Comparative Example 3 was improved in appearance compared to Comparative Example 1 in which no treatment was performed by performing paraffin-based water-repellent treatment on the glass cloth base fabric. However, it was incompatible with bending durability, and was a film material that was not suitable for a shutter or screen that was repeatedly wound and unwound. The paraffin-based water repellent treatment is insufficient to suppress the penetration of the paste sol into the glass cloth base fabric, and when forming the flame retardant resin coating layer, heat ray reflective particles and flame retardant particles enter the inside of the glass multifilament, It is thought that bending durability was impaired. In addition, although there was no incompatibility evaluation in flame resistance and combustion performance, the effect of reflecting the heat rays reaching the base fabric was reduced because the heat ray reflective particles had entered the inside of the glass multifilament, and flame resistance performance compared to Example 1. About a little inferior.

[Comparative Example 4]
A film material of Comparative Example 4 was obtained in the same manner as Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of the following Formulation 7 instead of Formulation 2. The mass of the flame retardant resin coating layer of the obtained film material is 100 g / m ^{2 in} both sides (mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) and the flame retardant resin coating layer 1: 0. .29), although the heat-reflective particles were contained in an amount of 3.3% by mass with respect to the flame-retardant resin coating layer, they did not contain the reactive urethane resin. The results of subjecting this membrane material to various tests are shown in Table 2.
(Formulation 7) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass 10 parts by mass of antimony trioxide (flame retardant particles) 6 parts by mass of flake-like interference mica particles having a reflection peak at a wavelength of 900 nm (Merck, Inc., trade name “Solar Flare 870”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

  The film material of Comparative Example 4 is a film material in which the two-component curable urethane-based resin is omitted from the flame-retardant resin coating layer of Example 1, and the bending durability is greatly inferior to that of Example 1. It was a film material that was not suitable for repeated unwinding and winding up such as screens and screens. This is because the adhesion between the glass cloth base fabric and the flame retardant resin coating layer is low, the flame retardant resin coating layer falls off during the bending test, and the glass multifilament yarn is directly exposed to repeated bending and is damaged. This is thought to be because it became easier to cut.

[Comparative Example 5]
A film material of Comparative Example 4 was obtained in the same manner as Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of the following Formulation 8 instead of Formulation 2. The mass of the flame retardant resin coating layer of the obtained film material is 100 g / m ^{2 in} both sides (mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) and the flame retardant resin coating layer 1: 0. .29), 12.8% by mass of reactive urethane resin and 2.9% by mass of heat ray reflective particles were contained in the flame-retardant resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 2.
(Formulation 8) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass 10 parts by mass of antimony trioxide (flame retardant particles) 6 parts by mass of flake-like interference mica particles having a reflection peak at a wavelength of 900 nm (Merck, Inc., trade name “Solar Flare 870”)
Polyester polyol (solid content: 100%) 15 parts by mass (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Nipporan 1004”)
12 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

  In the film material of Comparative Example 4, the amount of the reactive urethane resin contained in the flame retardant resin coating layer was 12.8% by mass with respect to the flame retardant resin coating layer, exceeding 10% by mass. Therefore, the flame-retardant resin coating layer becomes hard and bending durability becomes incompatible, and the film material is not suitable for applications such as shutters and screens that repeat unwinding and winding.

[Comparative Example 6]
A film material of Comparative Example 5 was obtained in the same manner as in Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition of Formula 9 below instead of Formulation 2. The mass of the flame retardant resin coating layer of the obtained film material is 100 g / m ^{2 in} both sides (mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) and the flame retardant resin coating layer 1: 0. .29), although 4.8% by mass of the reactive urethane resin was contained in the flame-retardant resin coating layer, it did not contain heat ray reflective particles. The results of subjecting this membrane material to various tests are shown in Table 2.
(Formulation 9) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass Antimony trioxide (flame retardant particles) 10 parts by weight Polyester polyol (solid content 100%) 6 parts by weight (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Nipporan 1004”)
3 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

Since the film material of Comparative Example 6 does not contain heat ray reflective particles in the flame retardant resin coating layer, it becomes unsuitable in the evaluation of flame resistance, and in the combustion test, the heating rate continues for 10 seconds or more and is 200 kW / m. Non-conformity exceeding ² .

[Comparative Example 7]
A film material of Comparative Example 6 was obtained in the same manner as in Example 1 except that the flame retardant resin coating layer was formed from the soft polyvinyl chloride resin composition having the following composition 10 instead of the composition 2. The mass of the flame retardant resin coating layer of the obtained film material is 120 g / m ^{2 in} total on both sides (mass ratio of the mass of the glass cloth base fabric (before the oil repellent treatment) to the flame retardant resin coating layer 1: 0. .35), 3.1% by mass of a reactive urethane resin was contained in the flame-retardant resin coating layer. The results of subjecting this membrane material to various tests are shown in Table 2.
(Formulation 10) Soft polyvinyl chloride resin composition Emulsion polymerization polyvinyl chloride resin (number average molecular weight 1700) 100 parts by mass Di-2-ethylhexyl phthalate (plasticizer) 50 parts by mass Tricresyl phosphate (plasticizer) 15 parts by mass Antimony trioxide (flame retardant particles) 10 parts by weight Magnesium hydroxide (flame retardant) 50 parts by weight Thermally expandable graphite 50 parts by weight (manufactured by Tosoh Corporation: trade name “Frame Cut GREP-EG”)
Polyester polyol (solid content: 100%) 6 parts by mass (Nippon Polyurethane Industry Co., Ltd .: trade name “Nipporan 1004”)
3 parts by mass of isocyanurated HDI (solid content: 100%) (manufactured by Nippon Polyurethane Industry Co., Ltd .: trade name “Coronate HX”)
Stabilizer: Ba-Zn series 2 parts by mass Ultraviolet absorber: Benzotriazole series 0.5 parts by mass Diluent: Toluene 20 parts by mass

  The film material of Comparative Example 7 does not contain heat ray reflective particles in the flame-retardant resin coating layer as in Comparative Example 6, but instead contains magnesium hydroxide and thermally expandable graphite. In conformity with. However, since magnesium hydroxide and thermally expandable graphite are added in large quantities, the bending durability is inferior, and the visible light transmittance is 0%. If the membrane material is separated, the occurrence of a fire cannot be recognized. The film material was not suitable for shutters and fire screens.

  The membrane material excellent in bending durability and flame resistance of the present invention has excellent flame resistance, durability against repeated bending, and translucency that can recognize the situation on the other side of the membrane material in the event of a fire. doing. Therefore, as a fire protection equipment to be installed alone in the opening of a building that is subject to the spread of fire as stipulated in the Building Standards Act, or to be attached to a window that does not meet the fire resistance standards, a film that constitutes a fireproof shutter or fireproof screen It can be suitably used for the material.

1: Film material 2: Glass cloth base fabric (fluorine compound and oil repellent treatment)
2-1: Warp 2-2: Weft 3: Flame retardant resin coating layer (contains heat ray reflective particles)

Claims (5)

  A flexible film material having a flame retardant resin coating layer formed on both sides of a glass cloth base fabric, and the entire glass cloth base fabric is oil-repellent treated with a fluorine-based compound. The flammable resin coating layer is formed of a coated cured product of a soft polyvinyl chloride resin composition containing a reactive urethane resin and heat ray reflective particles, and the heat ray reflective particles are formed inside the glass cloth base fabric. 3 to 10% by mass of the reactive urethane resin and 1 to 10% by mass of the heat ray reflective particles with respect to the flame-retardant resin coating layer, respectively, and the flexible film material The film material excellent in bending durability and flame resistance, characterized by having a visible light transmittance (JIS Z8722) of 15 to 55%.   2. The bending durability and flame resistance according to claim 1, wherein the reactive urethane resin is one type selected from a one-component curable urethane resin or a two-component curable urethane resin, or two or more types. Excellent membrane material.   The heat ray reflective particles are flake-like interference mica particles having at least one reflection peak in an infrared region having a wavelength of 800 nm to 2500 nm, and have excellent bending durability and flame resistance. Membrane material. The glass cloth base fabric is a woven fabric formed by weaving glass multifilament yarns, and has a mass of 90 to 400 g / m ² and a porosity of 0 to 5%. The film material excellent in bending durability and flame resistance described in the item.   The bending durability and flame resistance according to any one of claims 1 to 4, wherein a mass ratio of the glass cloth base fabric to the flame retardant resin coating layer is 1: 0.25 to 1: 3. Excellent film material.