JP5099754B2 - Fire and heat resistant film materials - Google Patents

Description

  The present invention relates to a fireproof and heat resistant film material used for fireproof shutters, flameproof dripping walls, lighting covers, internally illuminated signboards, spark receiving sheets and the like.

  Conventional film materials having excellent fire resistance and heat resistance include fabrics made of glass fibers that are inorganic fibers, silica cloth (glass fiber fabrics mainly composed of silicon dioxide) or carbon fiber fabrics such as fibers and resins having excellent heat resistance. A laminate is used.

Since these film materials are flexible and heat resistant, they are widely used for fire shutters, flame proof walls, lighting covers, internal lighting signs, spark receiving sheets, and the like.
As a conventional technology, fire shutters have been used iron shutters in the past, but it is difficult to evacuate when the shutter is closed, or people are caught when the shutter is lowered, etc. In recent years, as disclosed in Patent Document 1, a flexible film material resin-coated on silica cloth having higher heat resistance than glass fiber has been used as a fire shutter. A flexible fire shutter is a product that has the advantage of being able to lift and evacuate the shutter by hand even if the blame is delayed.

In addition, although these fire-proof shutter film materials are required to be non-combustible by the corn calorimeter test method, film materials obtained by resin-coating glass fiber fabrics are generally used.
There are two points to be improved in the film material for fireproof shutters based on this glass fiber fabric or silica cloth. The first point is that the fiber strength is significantly deteriorated by high-temperature exposure to fire. The second point may be thick and heavy. The reason why the film material for the fire prevention shutter is thick and heavy is that the density of the fabric structure is increased in order to prevent the passage of the flame even if the coating resin is burnt out. Moreover, it is also for maintaining the base-material intensity | strength after heat exposure. Therefore, twill weave or satin weave is used as a weave structure that increases the amount of yarn per unit area.

If a flame is difficult to escape and a thin and lightweight material is used, it is desirable that the structure of the entire fire-proof shutter is also low-cost.
There is a field of flameproof dripping walls as a fireproof and heat resistant film material application. The flame barrier wall has a purpose of temporarily storing smoke accumulated on the ceiling in the event of a fire to facilitate evacuation, and a glass plate containing metal fibers is generally used. These are, of course, non-combustible materials, but they are heavy and are installed on a ceiling that is 1 meter above the human head.

  For this reason, if a fall due to an earthquake or a fall due to aging is assumed, there is a problem that can cause human injury, and economically, a heavy glass plate is held economically, so construction costs and material costs are high There is also a problem.

  In order to solve these problems, as disclosed in Patent Document 2, a processing technique such as a printed circuit board is applied as a material that has a low risk of man-made disaster when dropped, is nonflammable, and has excellent transparency. What adjusted the refractive index using the glass fiber fabric is known. Patent Document 2 discloses a transparent noncombustible sheet composed of a thermosetting resin or the like and a manufacturing method thereof. This material is a material that is significantly reduced in weight to 1.3 kg when the conventional unit weight using a glass plate is 10 kg and has good transparency.

  However, the disadvantage of glass fiber is that it is weak against bending and bending, and the flame-proof hanging wall is installed indoors, but the membrane is affected by air-conditioning wind pressure or wind pressure due to the blowing of outside air near the entrance and exit. There are problems such as cracking of the material and fiber breakage, and problems that the trace of the bent portion does not recover if wrinkles enter during construction.

Therefore, in the use of the flameproof dripping wall, it is desired that the film material does not break or the fiber breaks against bending, and no wrinkles remain in the bent portion.
Next, acrylic plate moldings are often used for lighting covers, but when considering crisis management such as fires and earthquakes, acrylic plates are extremely flammable and have problems such as cracking. is not.

  In recent years, laminates based on glass fibers or silica cloth have been used to solve these problems. This laminate is an excellent material against the problem of burning and cracking of acrylic plates, but it is a flexible material, but if unintentional bending during construction is applied, the light transmission state at the bent part will change, lighting This is a material that is difficult to construct, as light transmission spots at this site occur through it and become a fatal defect.

There is a demand for a material that does not easily cause light transmission due to unintentional bending during construction and does not burn or break.
As an application close to lighting covers, there is an internal lighting type signboard. Internally illuminated signboards are signboards that can display letters and figures clearly even at night by writing letters, figures, etc. on the light-transmitting cover surface and turning on the lights at night.

  As for the internal lighting type signboard, a synthetic fiber fabric and resin laminate or a glass fiber fabric and resin laminate has been frequently used from conventional acrylic plates in recent years. The reason for using these laminates is that the danger of fire, cracking, dropping, etc. due to fire or earthquake can be avoided.

  In particular, sleeve signboards in urban buildings are required to be non-combustible materials due to revisions to the Building Standards Act, and film materials in which glass fiber is laminated with resin are often used. These film materials are materials that can avoid dangers such as fire, cracking, and dropping, and have a light-transmitting property like acrylic plates.

  However, there is a problem that bending marks are likely to remain with respect to bending / bending as in the lighting cover application, and the traces of the bent portions are not recovered. Therefore, if an unintentional bending mark at the time of construction remains, the light transmission state at the bent portion changes, and light transmission spots at this portion are generated through illumination, which becomes a fatal defect. Even in the internal lighting type signboard, it is desired that the film material is not broken or the fiber is not broken with respect to the bending, and the light transmission spots at the bending portion do not appear.

  In the above fire shutters, flame barriers, lighting covers, and internally illuminated signboards, evaluation standards based on the cone calorimeter test are set for fire prevention problems. The corn calorimeter test method is specified in the regulations of ASTM E 1354 or Article 2-9 of the Building Standards Act (Non-combustible materials). “Many organic materials contain oxygen It is a test method based on the well-known theory that the energy of 13.1 MJ is generated for 1 kg of quantity, and the error is within 5%.

The outline of the above test is that a 100 × 100 mm square sample is heated by applying uniform heat radiation of 100 kW / m ² from a distance of 25 mm, and at the same time, a high voltage spark is generated to gradually generate flammability from the sample. The gas is ignited and burned, and the total calorific value, maximum heat generation rate, and sample damage generated from the sample within a predetermined time are measured. Moreover, it is specified that the total calorific value is 8 MJ / m ² or less as each measured value and that the maximum heat generation rate does not exceed 200 KW / m ² for 10 seconds within 20 minutes after the start of heating.

  In this test, since the sample is subjected to heating with a heater close to 700 ° C. for 20 minutes, a glass fiber fabric is used for most of the substrates. When exposed to heat, the coating resins are burned out and the base material deteriorates significantly. Although it is suitable as a fireproof base material in the early stage of a fire, a film material having a base material strength against heat exposure is desired.

  Furthermore, since the glass fiber fabric is designed to be exposed to heat, it is designed as a membrane material. Therefore, the light transmission amount can be freely changed to increase the thickness or to increase the amount of yarn per unit area. The current situation is not possible.

  Other heat-resistant fibers include mineral fiber, glass wool, carbon fiber, ceramic fiber, and organic polymer fiber. Heating at a temperature close to 700 ° C in a fire test such as a cone calorimeter test method is assumed. For 20 minutes, a decrease in strength occurs. A film material that has sufficient strength even after heat exposure and that can freely change the amount of light transmission is desired.

As a special heat resistant film material, there is a spark receiving sheet. The film material used in this spark receiving sheet has the effect of preventing sparks during welding and scattering of “slow” to prevent fire. As a method for producing this film material, carbon fiber or glass fiber fabrics are resin-coated to prevent the penetration of small sparks from small gaps in the structure, or 150 g / m as disclosed in Patent Document 3. A method is adopted in which a satin weave with a basis weight of ^{2 to} 2000 g / m ² is used to eliminate the texture and prevent the penetration of small sparks. This film material is heavy, opaque, and has low light transmittance because it is made of carbon fiber or glass fiber fabric.

  If the spark receiving sheet has an appropriate light transmittance even from the viewpoint of use, it is possible to distinguish the material under the sheet and remove the flammable material. However, a spark receiving sheet having such a function is desired. ing.

As described above, it is a film material that has heat resistance and fire resistance, and has light transmission properties, and has strength even after being exposed to heat, and it is difficult to leave bending marks due to bending. A film material that satisfies the evaluation standard by the meter method is desired.
JP 2001-79104 A JP 2005-319746 A JP 2004-339625 A

  Under such circumstances, the present inventors have heat resistance and fire resistance in view of the above prior art, and have high strength retention even after being exposed to heat, and further, bending marks due to bending hardly remain. A film material in which a material containing an inorganic filler is laminated on a cloth made of fine metal wires in the process of intensive research for the purpose of developing a film material that meets the evaluation criteria according to the corn calorimeter method as necessary. However, the knowledge that these functions are satisfied was obtained.

  The fire-resistant / heat-resistant film material according to claim 1 of the present invention is formed by laminating a substance containing an inorganic filler on one side or both sides of a planar fabric made of a metal wire having a wire diameter of 300 μm or less. And

Fire and heat resistant film material according to claim 2, the content of the inorganic filler is 72% to 5%, wherein the amount of the material is ^{1250g / m 2 ~30g / m 2} .
The fireproof and heat resistant film material according to claim 3 is characterized in that the inorganic filler is an inorganic material having flame retardancy or a modified clay component.

Fire and heat resistant film material according to claim 4, characterized in that material containing inorganic filler is a high molecular compound.

  In the above configuration, when the wire diameter of the fine metal wire is larger than 300 μm, the fabric has a thickness more than twice the wire diameter in any of woven fabric, knitted fabric, and nonwoven fabric. There is a problem that the thickness of the object is added and the thickness becomes close to 700 μm, and the flexibility as a film material is lost. The wire diameter is selected depending on the case where the strength of the membrane material is required and the case where it is desired to reduce the thickness. The lower limit value of the wire diameter is preferably about 10 μm from the viewpoint of the current manufacturing technology and economy.

  The type of metal is not particularly limited, but iron, aluminum, copper, nickel and the like and alloys thereof are preferable. Those capable of producing high-strength and fine wires such as stainless steel wires, hard steel wires, piano wires, and iron wires made of these metals or alloys are preferable. More preferably, a stainless steel wire is preferable because it is excellent in corrosion resistance, tensile strength, and bending fatigue. Note that the cross section of the metal wire is not particularly limited to a circular shape, and there is no problem even if it is an irregular cross section. In view of transparency and thickness, the wire diameter is preferably as small as possible.

  The metal wire is a bundle of fine wires called monofilaments or multifilaments. Multifilaments have the advantage of being flexible to bending, but when bending is applied, the structure of the bundle collapses, and as a result, the reflection state of the light changes compared to the normal part. Suitable for applications that do not place importance on sex.

  In particular, stainless steel fibers have the feature that when bent, the part hardens and fatigue does not concentrate in one place. On the other hand, glass fiber fabrics tend to crease at the bent part, and if repeated bending is applied, the load concentrates on a part and easily breaks and cuts, whereas stainless steel fiber breaks and cuts even when bent. It has a feature that does not occur.

  The fabric structure is selected from woven fabrics, knitted fabrics, non-woven fabrics, and the like. However, when the light transmittance of the membrane material is increased, the opening ratio of the fabric can be easily adjusted, and the quality and economics such as the ease of weaving. From this aspect, a plain weave structure is preferable.

  The opening width is determined by the density which is the diameter of the wire and the number of fibers between 1 inch, and the opening width “opening width = (number of lines between 1 inch ÷ inch) −wire diameter” is determined. Multiplier / (square of opening width + wire diameter) × 100 ”. Therefore, it can be freely designed by the wire diameter and the number of lines between inches.

  The opening ratio of the planar fabric made of the metal wire used in the present invention varies depending on the purpose, but 70 + several percent is the upper limit. Although it is possible even with an aperture ratio of 75% or more, in the case of a plain weave structure, misalignment (a defective phenomenon in which the distance between warp and weft lines becomes non-uniform due to external force) easily occurs. On the other hand, the lower limit value can be set up to 0% in the case of twill weave, satin weave, etc., and when high translucency is not required, such a high-density weave structure can be used.

Therefore, as a film material obtained by laminating a laminate on one or both surfaces of a base material having an aperture ratio of 70 + several percent, the film material is excellent in permeability with an upper limit of approximately 70% transmittance.
Next, it is desirable that the laminated material contains 72% or less and 5% or more of an inorganic filler. Although the dispersibility and filling rate of the filler for the material to be laminated vary depending on the type, the present inventors have studied using an organic viscosity suitable for a nanocomposite, and as a result, the upper limit is 72% or less. Obtained. In addition, at the lower limit, there is also a paper on organic viscosity, which produces an effect with a small amount of filling, “Smectite Research Society Bulletin Vol. 13 No. 1“ Characteristics and Future Development of Organic Bentonite ”Hojun Masanobu Onigata ( 9 page 5, 5. Future development) ”is based on the fact that a minimum addition amount of 3 to 5% is required.

  In addition, the substance containing the filler needs to be a polymer compound, and among them, a synthetic resin is generally used, and any of a thermoplastic or thermosetting resin may be used. If roughly listed, celluloid, phenol resin, Alkyd resin, urea resin, cellulose acetate, vinyl acetate resin, acrylic resin, styrene resin, vinyl chloride resin, melamine resin, polyethylene, polyurethane resin, vinylidene chloride resin, polyamide resin, unsaturated polyester, silicone resin, Acrylonitrile / styrene resin, fluorine resin, epoxy resin, diallyl phthalate resin, acrylonitrile / butadiene / styrene resin, polyethylene terephthalate, polypropylene, polycarbonate, polyacetal, polyimide, polysulfone, polyphenylene ether, poly Chi terephthalates, polyether sulfone, liquid crystal polymer, polyphenylene sulfide, one or more polyetherimide can be used. In addition to these synthetic resins, there are natural rubbers, starches, biodegradable resins, etc., and roughly listed are polybeta-hydroxybutyric acid, polycaprolactone, polybutylene succinate, polybutylene succinate adipate, polyethylene succinate. One or more of nate, polylactic acid, polyvinyl alcohol, cellulose acetate, polyesteramide, and modified starch can be used.

  Next, as inorganic fillers, mineral inorganic materials such as calcium carbonate, talc, mica, bentonite, or flame retardant such as magnesium hydroxide, aluminum hydroxide, zinc oxide, antimony trioxide, antimony pentoxide, etc. One or more inorganic materials or modified clay components are used.

  Calcium carbonate, talc, mica and bentonite contribute to improving the heat resistance and fire resistance of substances containing these, and magnesium hydroxide, aluminum hydroxide, zinc oxide, antimony trioxide, antimony pentoxide, etc. This has the effect of reducing the heat generation rate during the initial combustion of the contained material and reducing the fire spread rate. Furthermore, organoclays are known as nanocomposites that can easily disperse nano-order fillers, and are related to flame resistance and heat resistance that improve heat resistance, fire resistance, reduce heat generation rate, and reduce fire spread rate. The effect is obtained and there is a feature that high transparency is obtained as compared with other inorganic fillers.

  When the inorganic filler component is a modified clay component, it becomes easy to form a nanocomposite with an organic material. The idea of nanocomposites is that conventional fillers can be dispersed in the nanometer order with respect to micrometer-sized dispersion, resulting in almost uniform dispersion and no reduction in the mechanical performance of the material.

Depending on the use of these membrane materials, the total heating value is 8 MJ / m ² or less within 20 minutes after the start of heating in the ASTM E 1354 corn calorimeter test method, and the maximum heat generation rate is 10 seconds within 20 minutes after the start of heating. It is necessary to satisfy the evaluation standard of not exceeding 200 KW / m ² continuously. Especially in the case of fire shutters, flame barriers, lighting covers, and internally illuminated signboards, the standard values may be set according to the regulations of Article 2, Item 9 of the Building Standards Act (non-combustible materials) depending on the location where they are used. Can be satisfied.

  In particular, when an inorganic filler of less than 72% is added to the laminated material, the inorganic substance becomes a combustion residue on the surface of the sheet-like fabric made of metal wire and forms a film even after being subjected to heat exposure in the corn calorimeter test. The effect which prevents the penetration of a flame is acquired.

Further, the amount of material used to be laminated on the fabric made of metal wire needs to be 1250 / m ² or less. The reason is that the total calorific value generated during combustion when the maximum amount of the organic hydrocarbon compound and the inorganic filler is mixed is 8 MJ / m ² or less. Various materials such as hydrocarbon compounds, silicon compounds, and vinyl chloride resins are selected as materials used for laminating the fabric. Among them, the one with the largest oxygen consumption during combustion is carbonized. It is a hydrogen compound, and 1.7 kg of oxygen is required for 1 kg of combustion of this hydrocarbon compound. The amount of heat generated during 1kg of oxygen consumption is 13.1MJ / m ^2, the amount of oxygen in the case of the calorific value and 8 MJ / m less than ² (specifically, 7.9MJ / m ²⁾ 7.9 /13.1=0.60 kg. Therefore, to generate heat of 7.9 MJ / m ² , the hydrocarbon compound Xkg is 0.35 kg in a proportional formula of 1 kg of hydrocarbon compound: 1.7 kg of oxygen = hydrocarbon compound Xkg: 0.6 kg of oxygen. However, in the present invention, since a maximum of 72% of the inorganic filler is included, the total substance weight = 0.35 kg / 0.28 = 1.25 kg, and this 1.25 kg is the weight per m ² . In addition, the lower limit is preferably 30 g / m ² as the film material and the amount of the substance containing the inorganic filler in view of economics and film strength. More preferably the amount of material including the inorganic filler is a ^{300g / m 2 ~500g / m 2} .

  The further excellent point of the present invention is that the light transmittance is 70% or less, while it is a fireproof / heat resistant film material. The light transmittance here is the amount of visible light that passes through the film material when the amount of visible light is 100%.

  The light transmittance is determined by the opening ratio of the fabric, the thickness of the laminated material, and the transparency. Therefore, the light transmittance can be freely adjusted in the range of 0% to 70% by adjusting the transparency of the laminated material.

  Various additives are added to the laminated material for imparting various functions. For example, colorants such as pigments and dyes, antioxidants, ultraviolet absorbers, light stabilizers, anti-aging agents, crosslinking agents, antifungal agents, antibacterial agents, plasticizers, heat stabilizers, rust inhibitors, fillers, There are various additives for the purpose of modifying plastics such as flame retardants.

  When flame retardancy is imparted to the membrane material using a flame retardant or the like, roughly speaking, horizontal combustion test methods such as the automobile-related standard MVSS302, AA style flame retardant evaluation test related to railway vehicles, JIS Z2150 The 45 degree sample holding flame retardance evaluation test in JIS A1323, and the flame retardance test method for welding sparks and fusing sparks in JIS A1323.

  In particular, in the flame retardancy test method for welding and melting sparks of a building construction sheet in JIS A1323, the fabric used is nonflammable in the present invention, so that the prescription design of the laminate is easy.

  Furthermore, depending on the application, there are cases where the surface of the laminated material, such as surface film strength, water resistance, water repellency, and chemical resistance, should be improved. Surface film strength, water resistance, water repellency, stain resistance, abrasion resistance, etc. by laminating such as film, fluorine film, polysiloxane film, acrylic film, polyurethane film, titanium oxide system with photocatalytic performance Addition of chemical resistance, oil resistance, photocatalytic function and the like can be performed.

  The laminating method of the laminating material is not particularly limited, such as a coating method, a laminating method, a dipping method, a calendar method, an extrusion laminating method, a gravure printing method, an offset printing method, a vapor deposition method, a sputtering method, and a CVD method.

  In the case of the present invention, when the laminated material has a low light scattering property and a light-transmitting material is used, or a net-like shape, a highly visible film material can be obtained through the film material. It becomes possible to use it for an internal lighting type signboard that requires a rate of at least 20 to 30%. The visibility here means that the shape of an object can be seen through the film material.

  As ancillary performance of the present invention, by using a metallic fabric, thermal performance such as heat dissipation and heat transfer speed, electrical conductivity, antistatic property, electromagnetic wave shielding property, and frictional voltage withstand speed decay rate. When using an organic clay such as bentonite as a filler, the gas barrier performance may be excellent.

As described above, the fireproof / heat resistant film material of the present invention has the following effects.
(1) Since the cloth which consists of metal wires is used, the effect that it is flexible without being broken is acquired, and it can pass the nonflammability evaluation test in the ASTM E 1354 corn calorimeter test method.
(2) It is possible to have strength as a base material even after receiving high thermal energy.
(3) An inorganic residue remains on the surface of the cloth made of a metal wire after combustion, and has a function of shielding heat and flame as a film material.
(4) Furthermore, since this film material uses a metal wire as a base material, it has conductive performance and antistatic performance.
(5) Moreover, the bentonite which uses bentonite as a raw material as an inorganic filler is a baffle plate by using bentonite which is a smectite type clay or an organic clay obtained by reacting montmorillonite which is a layered clay mineral with an organic cation. High gas barrier properties due to the effect can be obtained.

Hereinafter, embodiments of the present invention will be specifically described.
Embodiment 1
Dainippon Ink & Chemicals Co., Ltd. special flexible epoxy resin EPICLON EXA-4850-150 7.2g and toluene 623g, Hojun Co., Ltd. organic bentonite Sben NEZ 18.2g measuring 1 liter polyethylene bottle Put in.

  Further, a stirrer coated with a tetrafluoropolyethylene resin was placed in the polyethylene bottle, and shaken at room temperature with a shaker so as to eliminate organic bentonite lump (poor dispersion).

After sufficiently shaking, 0.58 g of triethylenetetramine was added as a curing agent for the epoxy resin, and the mixture was further shaken for 40 minutes.
Then, the defoaming of the preparation material was implemented using the vacuum deaeration apparatus. The timing of defoaming was such that when the bubbles immediately before boiling of toluene were continuously generated because the epoxy resin contained a large amount of toluene, the apparatus was stopped.

Using the solution thus obtained, the four sides were poured into a 30 cm square iron plate coated with a tetrafluoropolyethylene resin with an edge having a thickness of 2 mm.
SUS316 made by Nippon Special Textile Co., Ltd., product number “SUS316-L 130-40” wire diameter 40 micrometer metal wire was used as a material on the solution poured into the iron plate, and the density history was woven at 130 pcs / 吋. A plain weave fabric was placed.

This was then encouraged to spontaneously evaporate toluene in a draft for 30 minutes.
Further, the sample was heated from room temperature to 80 ° C. over 30 minutes, then placed in an atmosphere at 80 ° C. for 3 hours, and further heated from 80 ° C. to 125 ° C. over 1 hour. The temperature was raised to 150 ° C. over 2 hours, and the resin crosslinking reaction was completed over 2 hours.

The sample was returned to room temperature, and the sample was peeled off from the iron plate.
The thickness of the obtained sample was 80 micrometer.
The sample was tested by the ASTM E 1354 corn calorimeter test method using a corn calorimeter III manufactured by Toyo Seiki Seisakusho.

The weight of the measurement sample was 1.247 g in 10 cm square, and the total calorific value was 1.03 MJ (standard 8 MJ or less). In addition, since the maximum heat generation rate is 200 KW / m ² or less (the time for exceeding the standard 200 KW / m ² is 10 seconds or less), the excess time is 0 seconds, which satisfies the standard acceptance criteria.

Moreover, the inorganic residue resulting from bentonite remained on the surface of the metal fabric on the sample surface after combustion.
The sample before the combustion test was left in an atmosphere at 150 ° C. for 24 hours, and the change in weight was measured. The weight of the original 10 cm square 1.247 g was 1.245 g, showing almost no change.

  A tensile test based on JIS L1096 was performed using a 10 cm square sample after the combustion test measured by the corn calorimeter test method. The sample size was 3 cm wide and 10 cm long, and the measuring instrument chuck interval was 50 mm. The measured value was 155 N / 3 cm, and the measured value of the same material before the combustion test was 159 N / 3 cm, showing almost no decrease in strength.

Furthermore, the 10 cm square sample after the combustion test was bent at 180 degrees, but no cracks or flaws were generated.
On the surface of the sample after burning, inorganic residues resulting from bentonites remained on the surface of the metal fabric.
Embodiment 2
SUS316 manufactured by Nippon Special Textile Co., Ltd., the same as in the first embodiment, “SUS316-L 130-40” wire diameter A 40 micrometer metal wire is used as a material, and a plain weave woven fabric woven at a density of 130 / knit. placed.

  The resin used was a liquid polyester resin acrymate 1000 manufactured by DH Material Co., Ltd. After 75 parts by mass of Acrymate 1000 and 25 parts by mass of S-BEN NEZ, an organic bentonite manufactured by Hojun Co., Ltd., were coarsely dispersed and mixed with a stirrer, and then highly dispersed using a three-roll mill. As a resin curing agent, 0.5 part by mass of a mixed solution of 60% dioctyl phthalate and 40% benzoyl peroxide was added to the highly dispersed preparation and stirred so as to uniformly disperse. Further, this solution was placed in a bell-type vacuum apparatus to deaerate the solution.

  Next, the prepared solution was coated on a polyester film having a thickness of 50 μm at room temperature so as to have a thickness of 250 μm. And the metal fabric of the product number "SUS316-L 130-40" was mounted on this coating layer. Further, a 50 μm thick polyester film was placed thereon, and deaeration was performed while the uppermost polyester film was ironed with a metal rod.

The sheet thus prepared was left in a heating oven adjusted to 120 ° C. for 20 minutes to complete the resin curing.
A sample was taken out from the oven, and when the temperature reached room temperature, the polyester film on both sides was peeled off to obtain a film material based on a metal fabric.

This film material had a thickness of 100 μm, and the transparency was 10 cm away from the top of the paper on which 11-point characters were printed, and the visibility was confirmed, but the characters were sufficiently readable.
The sample was tested by the ASTM E 1354 corn calorimeter test method using a corn calorimeter III manufactured by Toyo Seiki Seisakusho.

The weight of the measurement sample was 229 g / m ² and the total calorific value was 3.24 MJ (standard 8 MJ or less). The maximum heat release rate was filled with 10 seconds or less acceptance criteria are standard time is 4.2 seconds in excess of 200 KW / m ² at 225 kW / m ^2.

  The sample was allowed to stand in a 150 ° C. atmosphere for 24 hours and the change in weight was measured. The 10 cm square sample 2.281 g had a weight of 2.191 g, was within measurement error with little variation, and had excellent heat resistance with no change in appearance.

  A tensile test based on JIS L1096 was performed using a 10 cm square sample after the combustion test measured by the corn calorimeter test method. The sample size was 3 cm wide and 10 cm long, and the measuring instrument chuck interval was 50 mm. The measured value was 152 N / 3 cm, and the measured value of the same material before the combustion test was hardly reduced in strength compared to 159 N / 3 cm. Moreover, although the sample after a test was bend | folded 180 degree | times as practical judgment, a crack and a flaw did not generate | occur | produce.

On the surface of the sample after burning, inorganic residues caused by bentonites remained on the surface of the metal fabric, and the fabric structure was clogged.
Comparative Example 1
A glass fiber fabric (GV818J, manufactured by Kanebo Co., Ltd.) Yarn density warp yarn × weft yarn = 33 × 43 yarns / weather plain weave fabric weight 190 g / m ² was used.

  To prepare the processing solution, 7.2 g of EPICLON EXA-4850-150 and 18.2 g of esben NEZ which is an organic bentonite were weighed and placed in a 1 liter polyethylene bottle.

  Further, a stirrer coated with a tetrafluoropolyethylene resin was placed in the polyethylene bottle, and shaken at room temperature with a shaker so as to eliminate organic bentonite lump (poor dispersion).

After sufficiently shaking, 0.58 g of triethylenetetramine was added as a curing agent for the epoxy resin, and the mixture was further shaken for 40 minutes.
Then, the defoaming of the preparation material was implemented using the vacuum deaeration apparatus. The defoaming timing was set immediately before boiling of toluene because the epoxy resin contained a large amount of toluene, and the solution was adjusted.

Using the solution thus obtained, the four sides were poured into a 30 cm square iron plate coated with a tetrafluoropolyethylene resin with an edge having a thickness of 2 mm.
The glass fiber fabric was placed on the solution poured into the iron plate.

This was then encouraged to spontaneously evaporate toluene in a draft for 30 minutes.
Further, the sample was heated from room temperature to 80 ° C. over 30 minutes, then placed in an atmosphere at 80 ° C. for 3 hours, further heated from 80 ° C. to 125 ° C. over 1 hour, and finally from 125 ° C. to 150 ° C. The temperature was raised to ° C. over 2 hours, and the resin crosslinking reaction was completed over 2 hours.

The sample was returned to room temperature, and the sample was peeled off from the iron plate.
The sample was tested by the ASTM E 1354 corn calorimeter test method using a corn calorimeter III manufactured by Toyo Seiki Seisakusho.

The weight of the measurement sample was 270 g / m ² and the total calorific value was 3.18 MJ (standard 8 MJ or less). In addition, since the maximum heat generation rate is 200 KW / m ² or less (the time for exceeding the standard 200 KW / m ² is 10 seconds or less), the excess time is 0 seconds, which satisfies the standard acceptance criteria.

Moreover, the inorganic residue resulting from bentonite remained on the surface of the metal fabric on the sample surface after combustion.
The sample before the combustion test was left in an atmosphere at 150 ° C. for 24 hours, and the change in weight was measured. Although the weight of the 2.751 g sample of the 10 cm square sample was slightly reduced to 2.623 g, there was little change in appearance and the like, and the heat resistance was excellent.

A tensile test based on JIS L1096 was performed using a 10 cm square sample after the combustion test measured by the corn calorimeter test method. The sample size was 3 cm wide and 10 cm long, and the measuring instrument chuck interval was 50 mm. The measured value was 39 N / 3 cm, and the decrease in strength was large compared to the original strength of 2000 N / 3 cm. Moreover, although the base material was confirmed to be cracked when the material after the test was bent 180 degrees as a practical judgment, a flaw was generated so that the glass fiber of the base material was cracked.
Comparative Example 2
A sample was prepared in the same manner as in Example 2 except that S-BEN NEZ which is an organic bentonite manufactured by Hojun Co., Ltd. was not used.

  The sample was allowed to stand in a 150 ° C. atmosphere for 24 hours and the change in weight was measured. The weight of the 2.20 g 10 cm square sample was 2.190 g and was within measurement error with little variation, and the appearance was not changed, and the heat resistance was excellent.

The film material had a thickness of 100 μm, and the transparency was 2 cm away from the top of the paper on which 11-point characters were printed.
The sample was tested by the ASTM E 1354 corn calorimeter test method using a corn calorimeter III manufactured by Toyo Seiki Seisakusho.

The weight of the measurement sample was 220 g / m ² and the total calorific value was 4.96 MJ. The maximum heat release rate is the time in excess of 200 KW / m ² at 225 kW / m ² is 8.8 seconds, filled with 10 seconds or less acceptance criteria standards.

  A tensile test based on JIS L1096 was performed using a 10 cm square sample after the combustion test measured with a corn calorimeter. The sample size was 3 cm wide and 10 cm long, and the measuring instrument chuck interval was 50 mm. The measured value was 153 N / 3 cm, and the measured value of the same material before the combustion test was almost no decrease in strength compared to 159 N / 3 cm. Further, as a practical judgment, when the material after the test was bent 180 degrees, cracking of the base material was confirmed, but cracking did not occur.

On the surface of the sample after burning, inorganic residues resulting from bentonites remained on the surface of the metal fabric.
Table 1 shows the measurement and evaluation results of Embodiments 1 and 2 and Comparative Examples 1 and 2 described above. In Table 1, ◎ is very excellent, ○ is excellent, and x is inferior.

Claims (5)

A fire-resistant / heat-resistant film material, wherein a material containing an inorganic filler is laminated on one side or both sides of a planar fabric made of a metal wire having a wire diameter of 300 μm or less. The content of the inorganic filler is 72% to 5%, fire and heat resistant film material of claim 1 wherein the amount of the material is ^{1250g / m 2 ~30g / m 2} . The fireproof / heat resistant film material according to claim 1 or 2, wherein the inorganic filler is an inorganic material having flame retardancy or a modified clay component. Fire and heat resistant film material according to any one of up to claims 1 to 3, characterized in that the material containing the inorganic filler is a high-molecular compound. 5. The fire-resistant / heat-resistant film material according to claim 1, wherein the light transmittance is 70% or less.