JP2022103187A - Membrane material and membrane roof using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a membrane material capable of suppressing generation of wrinkles during attachment, and maintaining suppression effect on generation of wrinkles when a membrane roof is manufactured by suspending the membrane material containing a glass fiber fabric in a warp direction, and a membrane roof using the membrane material.

SOLUTION: There is provided a membrane material containing a glass fiber fabric and a resin composition coated or adhered to the glass fiber fabric, in which flexure property in a weft direction of the glass fiber fabric is 24 gf cm²/cm in the membrane material measured by KES FB-2 PUREBENGINGTESTER, and the resin composition contains a white pigment.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a membrane material, particularly a membrane material suitable for a membrane ceiling, and a membrane ceiling using the same.

In the Great East Japan Earthquake that occurred on March 11, 2011, the ceilings of buildings with large-scale spaces such as gymnasiums fell off, and some facilities lost their lives. Then, in order to prevent damage caused by ceiling dropout during an earthquake, the Building Standards Law Enforcement Ordinance was partially revised in July 2013, and in August of the same year, "A series of technical standard notifications related to ceiling dropout countermeasures (2013 National Land Transport). Ministry Notification No. 771 and others) ”has been promulgated (enforced from April 1, 2014). As a result, if it falls under the category of "specified ceiling", it is obligatory to take measures to prevent it from falling out in accordance with these technical standards. Along with these, in recent years, membrane ceilings using glass fiber woven fabrics, which are excellent in nonflammability and relatively light, have been attracting attention.

As the glass cloth for the membrane ceiling, a glass cloth for the membrane ceiling made by weaving warp and weft, one of which is not bulky processed glass fiber yarn and the other of which is bulky processed glass fiber yarn is used. The sum of the weaving density of the non-bulky glass fiber yarn and the weaving density of the bulky glass fiber yarn is 80 to 93 threads / 25 mm, and the weaving of the non-bulky glass fiber yarn. The ratio (B / A) of the density A to the weaving density B of the bulky processed glass fiber yarn is 0.65 to 0.95, and the weaving structure of the glass cloth is a double weave. A glass cloth for a film ceiling having an opening ratio of 0.02 to 1.0% is known (see, for example, Patent Document 1). According to the film ceiling glass cloth, bulky processed glass fiber yarn is used, the weaving structure is double weave, and by having a specific weaving density, it has excellent sound absorption and human voice. It is said that it has excellent sound absorption in the low frequency range, which is the frequency range of the above, and that the reverberation of human voice is suppressed when it is used as a ceiling film.

WO2014 / 171188 Pamphlet

"Membrane Ceiling Casebook", [online], Japan Membrane Structure Association, [Search on September 29, 2016], Internet <URL: http: // www. makukouzo. or. jp / blog / hp / pp-content / uploads / 2015/12 / maku_tenjyo_004. pdf>

By the way, as the main construction method of the membrane ceiling, there are an all-around fixing type, a two-sided fixing type, and a point fixing type (see, for example, Non-Patent Document 1). FIG. 1 is a schematic diagram illustrating an example of a two-sided fixing type among the main construction methods of a membrane ceiling cited from Non-Patent Document 1, and FIG. 2 is a schematic diagram of a membrane ceiling cited from Non-Patent Document 1. It is a schematic diagram explaining an example of a point fixing type among the main construction methods. As illustrated in FIG. 1, the two-sided fixing type is a construction method in which only both ends (two sides) of the fabric, which is a film material, are fixed and the film is suspended in one direction. Further, as illustrated in FIG. 2, the point fixing type is a construction method in which a metal fitting is attached to the outer periphery of the fabric at a point and tension is applied while suspending the fabric to some extent. Further, the glass fiber woven fabric is long in the warp direction (warp direction) in the manufacturing process. Then, when applying a membrane material using a glass fiber woven fabric, it was considered to suspend it in a long warp direction.

However, as a result of studies by the present inventors, the glass cloth for membrane ceiling disclosed in Patent Document 1 is, for example, a membrane ceiling in which a membrane material is suspended in the meridian direction, such as the above-mentioned two-side fixing type and point fixing type. In this case, it was found that wrinkles may easily occur along the warp direction of the membrane ceiling glass cloth at the time of attachment. It was also found that the wrinkles at the time of mounting may become more noticeable when used as a membrane ceiling for a long period of time. Further, when wrinkles are generated on the film material, there is a problem that the aesthetic appearance is impaired.

Therefore, according to the present invention, when a membrane material containing a glass fiber woven fabric is suspended in the warp direction, it is possible to suppress the occurrence of wrinkles at the time of attachment and to maintain the effect of suppressing the occurrence of the wrinkles. It is an object of the present invention to provide a possible membrane material and a membrane ceiling using the membrane material.

The present inventors have investigated the cause of wrinkles easily occurring in the glass cloth for membrane ceiling when the glass cloth for membrane ceiling disclosed in Patent Document 1 is a glass cloth for which the glass cloth is suspended. ..

According to the studies by the present inventors, the glass cloth is originally hard and tends to wrinkle more easily than the woven fabric using synthetic fibers such as polyester fibers. Then, the present inventors have, for example, that the glass cloth for a membrane ceiling of the embodiment disclosed as a specific embodiment in Patent Document 1 has insufficient hardness in the weft direction, which is caused by this. It was found that wrinkles are likely to occur along the warp direction.

Therefore, as a result of further diligent study by the present inventor, it is assumed that the glass fiber woven fabric and the resin composition coated or attached to the glass fiber woven fabric are included, and the type of resin constituting the resin composition and the resin thereof. The bending characteristics of the film material measured by KES FB-2 PUREBENGINGTESTER in the weft direction of the glass fiber woven fabric are set as a specific range by appropriately controlling the amount of the composition, the weft composition of the glass fiber woven fabric, the weaving density, and the like. By doing so, it has been found that it is possible to suppress the occurrence of wrinkles along the warp direction at the time of attachment when the film ceiling including the glass fiber woven fabric is suspended in the warp direction.

In addition, the present inventor has investigated the cause of wrinkles that may become more noticeable when used as a membrane ceiling for a long period of time.

According to the study by the present inventors, when a film material containing a resin composition is used as a film ceiling in an indoor space and the film ceiling is installed below lighting such as a mercury lamp, the influence of the illumination light or reflected light. It was found that the resin composition deteriorated due to this, the hardness of the film material decreased, and the occurrence of wrinkles became more noticeable.

Therefore, as a result of further diligent studies by the present inventor, the resin composition coated or adhered to the glass fiber woven fabric contains a white pigment, so that the film material is used as a film ceiling in an indoor space, and the film ceiling is used. It has been found that the effect of suppressing the occurrence of wrinkles along the warp direction at the time of installation can be maintained even when the lamp is installed below the lighting such as a mercury lamp. The present invention has been completed by further studies based on such findings.

That is, the present invention provides a membrane material of the following aspects and a membrane ceiling using the same.
Item 1. A film material comprising a glass fiber woven fabric and a resin composition coated or affixed to the glass fiber woven fabric, the weft direction of the glass fiber woven fabric of the film material measured by KES FB-2 PUREBENGINGTESTER. A film material having a bending property of 24 gf · cm ² / cm or more and the resin composition containing a white pigment.
Item 2. Item 2. The membrane material according to Item 1, wherein the membrane material measured by KES FB-2 PUREBENGINGTESTER has a bending characteristic of the glass fiber woven fabric in the warp direction of 10 to 40 gf · cm ² / cm.
Item 3. The ratio of the bending characteristics in the weft direction of the glass fiber woven fabric to the bending characteristics in the warp direction of the glass fiber woven fabric (bending characteristics in the weft direction of the glass fiber woven fabric / bending characteristics in the warp direction of the glass fiber woven fabric) is 1.1 to Item 2. The film material according to Item 1 or 2, which is 1.6.
Item 4. Item 2. The film material according to any one of Items 1 to 3, wherein the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the film material is 12 to 25% by mass.
Item 5. Item 2. The membrane material according to any one of Items 1 to 4, wherein the glass fiber woven fabric has a plain weave structure.
Item 6. Item 6. The film material according to any one of Items 1 to 5, wherein the resin constituting the resin composition is an amorphous thermoplastic resin.
Item 7. A membrane ceiling containing the membrane material according to any one of the above items 1 to 6.
Item 8. Item 2. The membrane ceiling according to Item 7, wherein the membrane material is arranged in a state of being freely suspended in the warp direction of the glass fiber woven fabric.

According to the present invention, the film material comprising a glass fiber woven fabric and a resin composition coated or affixed to the glass fiber woven fabric, wherein the film material is measured by KES FB-2 PUREBENGING TESTER. Since the bending characteristic of the glass fiber woven fabric in the weft direction is 24 gf · cm ² / cm or more and the resin composition contains a white pigment, the film ceiling in which the film material containing the glass fiber woven fabric is suspended in the warp direction In this case, it is possible to suppress the occurrence of wrinkles at the time of attachment and to maintain the effect of suppressing the occurrence of the wrinkles.

It is a schematic diagram explaining an example of a two-sided fixing type among the main construction methods of a membrane ceiling quoted from Non-Patent Document 1. It is a schematic diagram explaining the example of the point fixing type among the main construction methods of a membrane ceiling quoted from Non-Patent Document 1.

The film material of the present invention comprises a glass fiber woven fabric and a resin composition coated or affixed to the glass fiber woven fabric, and the film material of the film material measured by KES FB-2 PUREBENGINGTESTER, the glass fiber woven fabric. The bending property in the weft direction is 24 gf · cm ² / cm or more, and the resin composition contains a white pigment. Hereinafter, the film material of the present invention will be described in detail.

<Glass fiber woven fabric>
The membrane material of the present invention includes a glass fiber woven fabric. As a result, when the membrane material of the present invention is a membrane ceiling, it is easy to improve nonflammability while making it relatively lightweight, and it also fulfills a function of improving sound absorption in a room.

The glass material constituting the glass fiber is not particularly limited, and a known glass material can be used. Specific examples of the glass material include non-alkali glass (E glass), acid-resistant alkali-containing glass (C glass), high-strength and high-elasticity glass (S glass, T glass, etc.), and alkali-resistant glass (AR glass). ), Etc. can be mentioned.

As the glass fiber constituting the glass fiber woven fabric, a glass yarn in which a plurality of single fibers, which are long fibers, are twisted is preferable. Among the glass yarns, bulky processed yarns obtained by processing the glass yarns in a bulky manner by an air jet or the like are more preferable as the wefts. The bulky processed yarn is more likely to absorb the resin composition solution more uniformly, and even when the amount of the resin composition adhered to the glass yarn is relatively small, the bending characteristics are more likely to be hard. Therefore, when the weft is a bulky processed yarn, it is easy to make the bending characteristics in the weft direction even harder with a relatively small amount of resin composition. Therefore, a film in which a film material containing a glass fiber woven fabric is suspended in the warp direction In the case of a ceiling, it becomes easier to suppress the occurrence of wrinkles along the warp direction at the time of mounting and to make it nonflammable. In addition, bulky processed yarn is bulky, and it is easy to reduce the gap between weft yarns with a relatively small number of threads (weaving density in the weft direction). It becomes easy to do. Among the bulky processed yarns, it is preferable to use a bulky processed yarn in which a combined twisted yarn in which a plurality of glass yarns are twisted in a direction opposite to the twisting direction of the glass yarns is bulkily processed by an air jet or the like. In this case, from the viewpoint of suppressing the occurrence of wrinkles at the time of mounting and further achieving both sound absorption and nonflammability, 2 to 4 glass yarns, which are single yarns twisted in the S direction or the Z direction, are used. It is preferable that the twisted yarn twisted in the direction opposite to the glass yarn is bulky processed by an air jet or the like to be a bulky processed yarn. The warp yarn is not particularly limited, but a plurality of glasses are used from the viewpoint of effectively adjusting the gap between the warp yarns even with a relatively low weaving density in the warp direction to make it easier to improve sound absorption and nonflammability. It is preferable that the yarn is a twisted yarn formed by twisting the yarn in a direction opposite to the twisting direction of the glass yarn, and two to four glass yarns (single yarns) are twisted in a direction opposite to the twisting direction of the glass yarn. It is more preferable to use a synthetic twisted yarn. In the case of the bulky processed yarn, the number of twists (number of upper twists) of the combined twisted yarn is preferably 2 to 5 times / 25 mm, and more preferably 3.0 to 4.5 times / 25 mm. Further, as the number of twists (number of upper twists) in the case of the above-mentioned combined twisted yarn, 2 to 5 times / 25 mm is preferable, and 3.0 to 4.5 times / 25 mm is more preferable.

The number of single fibers in the yarn (single yarn) is not particularly limited, but is preferably 30 to 800. Above all, as the warp and weft, it is preferable to use a bulky processed yarn in which a twisted yarn in which a plurality of yarns (single yarns) composed of 100 to 800 single fibers are twisted together is bulkily processed by an air jet or the like. Further, as the warp, it is preferable to use a combined twisted yarn in which a plurality of yarns (single yarns) composed of 100 to 800 single fibers are twisted together. The diameter of the single fiber in the yarn is, for example, 3.0 to 12.0 μm, preferably 5.0 to 9.0 μm. As the count of the glass yarn, for example, 10 to 1000 tex is mentioned, and 100 to 500 tex is preferably mentioned. Among them, when the weft is a bulky processed yarn, the count of the bulky processed yarn includes 100 to 500 tex, preferably 200 to 400 tex, and more preferably 250 to 350 tex. When the warp is a plyed yarn, the count of the plyed yarn is, for example, 50 to 500 tex, preferably 50 to 200 tex, and more preferably 100 to 180 tex. The ratio of the weft count to the warp count (weft count / warp count) is along the warp direction at the time of installation when the film ceiling including the glass fiber woven fabric is suspended in the warp direction. From the viewpoint of suppressing the occurrence of wrinkles and further achieving both sound absorption and nonflammability, for example, 1 to 5, 2 to 4 are preferable, and 2 to 2.5 are more preferable. Be done. Further, the glass yarn may be a coated yarn coated with a resin or the like for the purpose of adjusting the bending characteristics in the weft direction or the warp direction. Examples of the resin and the like include thermoplastic resins such as vinyl chloride resin.

In the present invention, the weaving structure of the glass fiber woven fabric is not limited, and examples thereof include plain weave, satin weave, twill weave, diagonal weave, ridge weave, warp double weave, weft double weave, and double weave. Among them, plain weave is preferable from the viewpoint of further suppressing wrinkles and swelling of the membrane material and further enhancing the aesthetic appearance when the membrane ceiling is used, and in particular, the membrane material containing one plain weave glass fiber fabric is used. Is more preferable. Specifically, in the case of double weaving or a stack of multiple glass fiber woven fabrics, when the membrane material is rolled into a roll for transportation, the glass woven fabric that is inside the roll is the glass that is outside the roll. Compared to woven fabrics, it is much easier in the long direction, and when it is unwound to form a membrane ceiling, wrinkles may be more likely to occur.

In the present invention, the weaving density of the glass fiber woven fabric is not particularly limited. For example, it can be appropriately adjusted for the purpose of enhancing the nonflammability and sound absorption of the film material, and examples thereof include 10 to 200 lines / 25 mm, and 10 to 100 lines / 25 mm are preferable. In this case, if the gap between the warp and the gap between the warp and the weft is set to 0.5 mm or less, the nonflammability is easily improved. Further, the ratio of the weft density between the warp and the weft (weft density / warp weft density) is 0.4 to 1.0, and the viewpoint of further improving nonflammability and sound absorption. Therefore, 0.4 to 0.75 is preferable, 0.4 to 0.64 is more preferable, and 0.5 to 0.6 is particularly preferable. The mass (g / m ² ) of the glass fiber woven fabric is not particularly limited, and examples thereof include 100 to 1000 g / m ² , preferably 200 to 600 g / m ² , and more preferably 350 to 450 g / m ² . Preferred. Further, in the present invention, the thickness (mm) of the glass fiber woven fabric is not particularly limited, and examples thereof include 0.2 to 0.8 mm, preferably 0.3 to 0.5 mm, and 0. 4 to 0.5 mm is more preferable.

In the present invention, the glass fiber woven fabric suppresses the occurrence of wrinkles at the time of attachment when the membrane material containing the glass fiber woven fabric is suspended in the warp direction, and has sound absorption and nonflammability. From the viewpoint of further compatibility, the warp includes a synthetic twisted yarn having a count of 100 to 180 tex, and the weft includes a bulky processed yarn having a count of 250 to 350 tex. It is more preferably 10 to 30 threads / 25 mm, and the ratio of the weft count to the warp count (weft count / warp count) is 2 to 4, and the warp count is 100 to 180 tex. The combined twisted yarn and the weft include bulky processed yarn having a count of 250 to 350 tex, the weaving density of the warp is 25 to 35/25 mm, the weaving density of the weft is 15 to 20/25 mm, and the weaving density of the warp and the said. The ratio of the weft to the weaving density (weft density / warp weaving density) is 0.5 to 0.6, and the ratio of the weft count to the warp count (weft count / warp count). ) Is more preferably 2 to 4.

(Resin composition coated or attached to glass fiber woven fabric)
The membrane material of the present invention includes a resin composition coated or attached to a glass fiber woven fabric. As a result, it is possible to suppress the occurrence of wrinkles at the time of attachment when the membrane ceiling including the glass fiber woven fabric is suspended in the warp direction. In other words, the glass fiber woven fabric without the resin composition suppresses the occurrence of wrinkles along the warp direction at the time of attachment when the film ceiling including the glass fiber woven fabric is suspended in the warp direction. I can't.

In the present invention, the type of resin constituting the resin composition is not particularly limited. For example, curable resins such as vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, vinyl chloride resin (monopolymer of vinyl chloride, copolymer of vinyl chloride and other monomers are included. ), Acrylic resins (including polymers and copolymers such as acrylic acid, acrylic acid ester, acrylamide, acrylonitrile, methacrylic acid, methacrylic acid ester), saturated polyester resins, polyamide resins and other thermoplastic resins. And so on. By the way, when the membrane material is a large-area membrane ceiling, it is desired that the membrane material be easily joined at the membrane ceiling construction site, and the joining method is desired to be joined by high-frequency dielectric heating. From the viewpoint of facilitating bonding by high-frequency dielectric heating, the type of the resin is preferably an amorphous thermoplastic resin. Examples of the amorphous thermoplastic resin include acrylic resin, polycarbonate resin, ABS resin, polystyrene resin, polymer having an alicyclic structure, cellulose resin, vinyl chloride resin, polysulfone, polysulfone ether and the like. Be done. Among the amorphous thermoplastic resins, when the film ceiling including the glass fiber woven fabric is suspended in the warp direction, it is possible to suppress the occurrence of wrinkles along the warp direction at the time of mounting and to make it nonflammable. From the viewpoint of achieving more compatibility, it is preferable that the bending characteristics are effectively hardened with a relatively small amount of resin, and for example, hard vinyl chloride resin and acrylic resin are preferable. Above all, vinyl chloride- (meth) acrylic acid ester from the viewpoint of further achieving both the effect of suppressing wrinkles at the time of mounting when the amount of the resin is small, nonflammability, and ease of joining by high-frequency dielectric heating. Copolymers are particularly preferred. In the case of the vinyl chloride- (meth) acrylic acid ester copolymer, by increasing the copolymerization ratio of the vinyl chloride unit, it becomes easier to enhance the effect of suppressing wrinkles at the time of mounting when the amount of resin is small. be able to. In this case, the copolymerization ratio of the vinyl chloride unit in the vinyl chloride- (meth) acrylic acid ester copolymer is preferably 40 to 90% by mass, more preferably 70 to 90% by mass, and particularly preferably 75 to 85% by mass. preferable. Further, as the mass ratio of the resin component in the resin composition, for example, 80 to 99% by mass is mentioned, and 90 to 99% by mass is preferable.

In the film material of the present invention, the resin composition contains a white pigment. Thereby, for example, even when the membrane material is used as a membrane ceiling in an indoor space and the membrane ceiling is installed below the mercury lamp lighting, the resin composition is suppressed from being deteriorated by the influence of the illumination light and attached. It is possible to maintain the effect of suppressing the occurrence of wrinkles at the time.

Examples of the white pigment include titanium oxide, zinc oxide, zinc sulfide, zinc sulfate, barium sulfate, calcium carbonate and alumina, and among them, titanium oxide, barium sulfate and calcium carbonate are preferable, and titanium oxide is particularly preferable. The average particle size (primary particles) of the white pigment is preferably 0.005 to 10 μm, more preferably 0.05 to 2.0 μm.

In the present invention, the average particle size of the white pigment is the volume average particle size measured by the laser diffraction / scattering type particle size distribution measuring device.

The white pigment may be surface-treated for neutralization, reduction of photocatalytic action, and improvement of wettability with the resin constituting the resin composition. Examples of the surface treatment agent include metal oxides such as alumina, silica, zinc oxide and zirconium oxide, organic acids such as stearic acid or metal salts thereof, polyols, silane coupling agents and titanium coupling agents.

In the film material of the present invention, the mass ratio (mass%) of the white pigment in the resin composition further suppresses the generation of wrinkles along the warp direction at the time of mounting, and further suppresses the generation of wrinkles at the time of mounting. From the viewpoint of sustainability, 5 to 30% by mass is preferable, and 15 to 25% by mass is more preferable.

In the present invention, examples of the mass (g / m ² ) of the resin composition coated or attached to the glass fiber woven fabric include 30 to 120 g / m ² . Above all, when a film ceiling containing a glass fiber woven fabric is suspended in the warp direction, it suppresses the occurrence of wrinkles along the warp direction at the time of installation, and is nonflammable, sound absorbing, and high-frequency dielectric heating. From the viewpoint of making it easier to achieve both ease of joining with the above, 50 to 100 g / m ² is preferable, and 70 to 90 g / m ² is more preferable.

In the present invention, the resin composition coated or attached to the glass fiber woven fabric can contain components other than the resin and the white pigment. Examples of the other components include color pigments such as cross-linking agents, organic pigments and inorganic pigments, and additives such as dyes, ultraviolet absorbers and infrared absorbers. Above all, from the viewpoint of suppressing the occurrence of wrinkles along the warp direction at the time of mounting and making it nonflammable when a film material containing glass fiber woven fabric is suspended in the warp direction. A resin coated or affixed to a glass fiber woven fabric or a resin composition having a low content of a plasticizing agent is preferable so that the bending characteristics can be effectively set in a specific range with a relatively small amount of resin. In the film material of the present invention, the content of the plasticizer is 5 parts by mass or less, preferably 3 parts by mass or less, preferably 1 part by mass or less, with respect to 100 parts by mass of the resin coated or adhered to the glass fiber woven fabric. More preferably, parts by mass or less are mentioned, and 0 parts by mass (that is, the film material of the present invention does not contain a plasticizer) is particularly preferably mentioned. In the present invention, the plasticizer is a component that is added to the thermoplastic resin and is known to give flexibility to the thermoplastic resin. For example, a phthalic acid-based plasticizer, a trimellitic acid ester-based plasticizer, and a fat. Group polybasic acid plasticizer, phosphoric acid ester plasticizer, epoxy plasticizer, fatty acid ester plasticizer, polyhydric alcohol ester plasticizer, alcohol plasticizer, fatty acid plasticizer, amide plasticizer, high Examples thereof include molecular plasticizers, mineral oils, vegetable oils and the like. Specifically, examples of the phthalic acid-based plasticizer include dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, di-n-octyl phthalate, di-n-ethylhexyl phthalate, and diisooctyl phthalate. Di-n-octyl phthalate, di-n-decyl phthalate, diisodecyl phthalate, di-n-dodecyl phthalate, diisotridecyl phthalate, dicyclohexyl phthalate, butyl benzyl phthalate, di-2-ethylhexyl phthalate, isophthal Phthalic acid di-2-ethylhexyl can be mentioned, and examples of the trimellitic acid ester-based plastic agent include tri-2-ethylhexyl trimellitic acid and triisodecyl trimellitate, and examples of the aliphatic polybasic acid-based plasticizer include triisodecyl trimellitic acid. For example, diisobutyl adipate, hexyl adipate, di-n-decyl adipate, diisodecyl adipate, di-2-ethylhexyl adipate, di-2-ethylhexyl azelaine, dibutyl sebacate, di-2-ethylhexyl sebacate, Methoxyethyl adipate, tributyl o-acetylcitrate,
-Triethyl acetyl citrate can be mentioned, and examples of the phosphate ester-based plasticizer include triethyl phosphate, tributyl phosphate, tri-2-ethylhexyl phosphate, diphenylethyl phosphate, and tricresyl phosphate, and epoxy-based plasticizers. Examples of the plasticizer include epoxidized soybean oil and epoxidized toll oil fatty acid-2-ethylhexyl, and examples of the fatty acid ester-based plasticizer include butyl stearate, butyl oleate, chlorinated paraffin and chlorinated fatty acid. Examples thereof include methyl, butoxyethyl stearate, methoxyethyl oleate, and 2- (p-tert-butylphenoxyethyl) acetate, and examples of the polyhydric alcohol ester-based plasticizer include butylphthalylbutylglycolate and glyceroltributy. Examples thereof include rates and triethylene glycol dipelargonates, and examples of the alcohol-based plasticizer include 2- (p-tert-amylphenoxy) ethanol, 2- (p-tert-butylphenoxy) ethanol, diamilphenoxyethanol, and cetyl. Examples include alcohol, myristyl alcohol, and stearyl alcohol. Examples of the fatty acid-based plasticizer include oleic acid, lysinolic acid, and stearic acid, and examples of the amide-based plasticizer include bisdibutylamide adipate and dibutyl laurate. Examples thereof include amide, diethyldiphenylurea, p-toluenesulfonamide, and ethyl-p-toluenesulfonamide. Examples of the polymer plasticizer include polyethylene glycol dimethyl ether, polyethylene glycol benzoic acid ester, and a polymer containing an ester group. Examples thereof include compounds (dibasic acids such as adipic acid, sebacic acid and phthalic acid and polycondensates such as 1,2-propylene glycol and 1,3-propylene glycol).

In the present invention, the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the film material is preferably 12 to 25% by mass. Further, in the present invention, the ratio of the mass (g / m ² ) of the glass fiber woven fabric to the mass (g / m ² ) of the film material is preferably 75 to 88 mass%. By doing so, when a membrane ceiling containing a membrane material containing glass fiber woven fabric is suspended in the warp direction, the occurrence of wrinkles along the warp direction at the time of mounting is suppressed, and nonflammability and sound absorption are achieved. It is possible to make it easier to achieve both the ease of joining by high-frequency dielectric heating and the suppression of whitening when the film material is bent.

(Characteristics of membrane material)

(Bending characteristics)
The membrane material of the present invention has a bending characteristic of the membrane material measured by KES FB-2 PUREBENGINGTESTER in the weft direction of the glass fiber woven fabric of 24 gf · cm ² / cm or more. As a result, it is possible to suppress the occurrence of wrinkles along the warp direction at the time of attachment when the membrane ceiling including the glass fiber woven fabric is suspended in the warp direction. In the present invention, specifically, the bending characteristics of the membrane material are fixed by fixing a 1 cm width of a predetermined region of each sample between chucks at 1 cm intervals as a sample, bending to the front side up to a maximum curvature of +2.5 cm ^-1 , and then bending. It is measured by bending it back to the maximum curvature -2.5 cm ^-1 and then returning it to its original position.

From the viewpoint of suppressing the occurrence of wrinkles along the warp direction at the time of mounting and making it nonflammable when the membrane material containing glass fiber woven fabric is suspended in the warp direction, the above process The bending characteristics in the direction are preferably 24 to 60 gf · cm ² / cm, more preferably 30 to 50 gf · cm ² / cm.

As a method for setting the bending property in the weft direction to 24 gf · cm ² / cm or more, it is necessary to include a resin composition coated or attached to a glass fiber woven fabric. Other than this, for example, the weft of the glass fiber woven fabric may be a bulky processed yarn, the count and fiber diameter of the weft may be increased, and the amount and type of resin coated or attached to the glass fiber woven fabric may be adjusted. To do. It is also effective to select a resin having a high hardness as the resin constituting the resin composition, or to increase the content of the resin having a high hardness or the copolymerization component for increasing the hardness. The hardness of the resin is, for example, , JIS K7215 has a shore D hardness of 40 or more, preferably about 50 to 90, more preferably about 60 to 90, and even more preferably about 70 to 90. Further, in order to increase the hardness of the resin composition, a cross-linking agent or the like can also be used.

In the membrane material of the present invention, the bending characteristic of the membrane material measured by KES FB-2 PUREBENGINGTESTER in the warp direction of the glass fiber fabric is preferably 10 to 40 gf · cm ² / cm, preferably 15 to 35 gf · cm. It is more preferably ² / cm, and particularly preferably 25 to 35 gf · cm ² / cm. By setting such a range, for example, when the membrane material is suspended in the warp direction, especially when the membrane material is suspended in the warp direction as a two-sided fixing type, the end portion (the portion corresponding to the selvage portion of the glass fiber woven fabric). It becomes easier to achieve both less slack and nonflammability.

(Sound absorption)
The film material of the present invention preferably has a vertical incident sound absorption coefficient of 0.5 or more, and more preferably 0.6 to 0.9. In the present invention, the vertical incident sound absorption coefficient is measured as follows. That is, according to JIS A 1405-2: 1998, SR-4100 manufactured by Ono Sokki Co., Ltd. was used, and a space having a diameter of 100 mm and a space of 300 mm as a back air layer was provided. The sound absorption coefficient is measured every 2 Hz at a frequency of 100 Hz to 1600 Hz, and the arithmetic mean value of the sound absorption coefficient of each frequency is taken as the vertical incident sound absorption coefficient in the present invention.

As a method of setting the sound absorption coefficient in the above range, for example, bulky processed yarn is used as the warp or weft constituting the glass fiber woven fabric, or the glass fiber so that the film material of the present invention has fine pores for enhancing sound absorption. The weaving density of the woven fabric is adjusted, and the content of the resin composition is adjusted. Further, it is also effective to set the air permeability of the membrane material of the present invention to 10 to 30 cm ³ / cm ² / sec.

(Incombustibility)
Since the membrane material of the present invention contains a glass fiber woven fabric, it is excellent in nonflammability. From the viewpoint of further improving the nonflammability of each material of the present invention, it is preferable that the film material of the present invention satisfies the following requirements.
<Requirements>
From the radiant electric heater measured according to 4.10.2 heat generation test / evaluation method in "Fireproof performance test / evaluation work method manual" (changed version on March 1, 2014) of the Building Materials Testing Center. In a heat generation test in which the surface of the sheet is irradiated with radiant heat of 50 kW / m ² , the maximum heat generation rate does not exceed 200 kW / m ² continuously for 10 seconds or more after the start of heating, and the total heat generation for 20 minutes after the start of heating. The amount is 8 MJ / m ² or less.

As a method for satisfying the above requirements for the film material of the present invention, for example, the amount of the resin coated or adhered to the glass fiber woven fabric can be adjusted, the type can be selected, or the resin composition containing a flame retardant can be selected. It can be made into a thing. As the type of the resin, for example, it is preferable that it contains a halogen such as a vinyl chloride resin, and the warp direction at the time of attachment when a film ceiling including a film material containing a glass fiber woven fabric is suspended in the warp direction. From the viewpoint of further achieving both nonflammability and suppression of wrinkles along the surface, vinyl chloride resin and acrylic resin can be contained, or a vinyl chloride-acrylic acid ester copolymer can be used.

In addition, the film material of the present invention is the 4.10.2 heat-generating test / evaluation method in the "Fireproof Performance Test / Evaluation Business Method Manual" (revised on March 1, 2014) of the Building Materials Testing Center. In the heat generation test in which the surface of the sheet is irradiated with radiant heat of 50 kW / m ² from the radiant electric heater measured according to the above, it is more preferable that there are no through holes of 0.5 mm square or more for 20 minutes after the start of heating. .. As a method for easily satisfying this requirement, for example, the weaving density, the warp structure, and the weft structure are adjusted so that the gap spacing between the warp threads and the gap spacing between the weft threads constituting the glass fiber woven fabric are 0.5 mm or less. Selection etc. can be mentioned.

The film material of the present invention has a color difference ΔE after an exposure test performed under the following conditions from the viewpoint of further suppressing the generation of wrinkles along the warp direction at the time of mounting and the effect of suppressing the generation of wrinkles at the time of mounting. * Ab is preferably less than 3.0, more preferably less than 2.0.
(Exposure test)
The membrane material is exposed to 200 hours according to JIS K 7350-4. The test conditions are a black panel temperature of 63 ° C., a humidity of 50%, and no water spray. The color of the exposed surface and the opposite surface are measured with a color difference meter "CR300" manufactured by Konica Minolta Co., Ltd., and the color difference ΔE * ab is obtained by the method of JIS Z 8730: 2009 7.1.1.

(Mass and thickness)
The mass of the film material of the present invention is not particularly limited. Examples of the mass include 200 to 1000 g / m ² . For example, in the case where the membrane material of the present invention is a continuous membrane ceiling (including a membrane material of the present invention bonded by high frequency induction heating), the area of the continuous membrane ceiling is 25 m. The weight is 200 to 550 g from the viewpoint of reducing the weight of the membrane material, improving the handleability, and reducing the number of parts for fixing the membrane ceiling when the membrane material has a large area of ² or more. It is particularly preferable to set / m ² . Further, in consideration of nonflammability and the like, the mass of the membrane material can be set to 400 to 550 g / m ² while making the mass of the glass fiber woven fabric appropriate. The thickness is not particularly limited, but may be, for example, 0.3 to 0.8 mm, preferably 0.48 to 0.60 mm from the viewpoint of handleability.

Hereinafter, the present invention will be described in detail with reference to examples. However, the present invention is not limited to the examples.

(Example 1)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitica Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitica Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 18 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) A resin composition solution was prepared by mixing 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.) which are white pigments. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 18/25 mm, the thickness of the glass fiber woven fabric was 0.43 mm, and the weft spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 80 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83% by mass, the mass of the film material is 460 g / m ² , and the thickness of the film material is 17% by mass. The mass was 0.60 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 2)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 18 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 75 mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43 mass%, Viniblanc (registered trademark) 278) 25 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion B (mass ratio of vinyl chloride unit / acrylic acid ester unit 50/50, solid content 43% by mass, Vinibran (registered trademark) 271) with white pigment A resin composition solution was prepared by mixing 10 parts by mass of certain titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.). The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 18/25 mm, the thickness of the glass fiber woven fabric was 0.43 mm, and the weft spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 80 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83% by mass, the mass of the film material is 460 g / m ² , and the thickness of the film material is 17% by mass. The mass was 0.60 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 3)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitica Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitica Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 18 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 50 mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43 mass%, Viniblan (registered trademark) 278) 50 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion B (mass ratio of vinyl chloride unit / acrylic acid ester unit 50/50, solid content 43% by mass, Vinibran (registered trademark) 271) with white pigment A resin composition solution was prepared by mixing 10 parts by mass of certain titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.). The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 18/25 mm, the thickness of the glass fiber woven fabric was 0.43 mm, and the weft spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 80 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83% by mass, the mass of the film material is 460 g / m ² , and the thickness of the film material is 17% by mass. The mass was 0.60 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 4)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 20 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 20/25 mm, the thickness of the glass fiber woven fabric was 0.45 mm, and the weft spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 80 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). Is 17% by mass, the ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83% by mass, the mass of the film material is 480 g / m ² , and the thickness of the film material. The mass was 0.62 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 22 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 22/25 mm, the thickness of the glass fiber woven fabric was 0.47 mm, and the weft spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 85 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). Is 17% by mass, the ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83% by mass, the mass of the film material is 505 g / m ² , and the thickness of the film material. The mass was 0.64 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 6)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 19 threads / 25 mm and the weft density was 20 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 18% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 19 pieces / 25 mm, the weaving density in the weft direction was 20 pieces / 25 mm, the thickness of the glass fiber woven fabric was 0.35 mm, and the warp spacing of the glass fiber woven fabric was The gap between the gaps exceeds 0.5 mm, the mass of the resin composition is 65 g / m ² , and the ratio of the mass of the resin composition (g / m ² ) to the mass of the film material (g / m ² ) is 18 mass%. The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 82 mass%, the mass of the film material is 365 g / m ² , and the thickness of the film material is 0.5 mm. there were. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 7)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 19 threads / 25 mm and the weft density was 22 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 19 pieces / 25 mm, the weaving density in the weft direction was 22 pieces / 25 mm, the thickness of the glass fiber woven fabric was 0.35 mm, and the warp spacing of the glass fiber woven fabric was The gap between the gaps exceeds 0.5 mm, the mass of the resin composition is 65 g / m ² , and the ratio of the mass of the resin composition (g / m ² ) to the mass of the film material (g / m ² ) is 17 mass%. The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83 mass%, the mass of the film material is 385 g / m ² , and the thickness of the film material is 0.5 mm. there were. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 8)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 19 threads / 25 mm and the weft density was 25 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 16% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 19 pieces / 25 mm, the weaving density in the weft direction was 25 pieces / 25 mm, the thickness of the glass fiber woven fabric was 0.35 mm, and the warp spacing of the glass fiber woven fabric was The gap between the gaps exceeds 0.5 mm, the mass of the resin composition is 65 g / m ² , and the ratio of the mass of the resin composition (g / m ² ) to the mass of the film material (g / m ² ) is 16 mass%. The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 84 mass%, the mass of the film material is 405 g / m ² , and the thickness of the film material is 0.5 mm. there were. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Example 9)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECG37 1/0 1.0Z) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 25 threads / 25 mm and the weft density was 22 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As the resin composition to be coated, 100 parts by mass of vinyl chloride-acrylic acid ester copolymer emulsion A (mass ratio of vinyl chloride unit / acrylic acid ester unit 80/20, solid content 43% by mass, Vinibran (registered trademark) 278) , 10 parts by mass of titanium oxide fine particles (trade name RYUDYE-W WHITE TA-705 manufactured by DIC Co., Ltd.), which is a white pigment, was mixed to prepare a resin composition solution. The obtained glass fiber woven fabric is immersed in the resin composition solution, and the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the obtained film material is 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric is 25 pieces / 25 mm, the weaving density in the weft direction is 22 pieces / 25 mm, the thickness of the glass fiber woven fabric is 0.34 mm, and the weft spacing of the glass fiber woven fabric is The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin composition is 80 g / m ² , and the mass of the resin composition relative to the mass of the film material (g / m ² ) (g / m ² ). The ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83 mass%, the mass of the film material is 470 g / m ² , and the thickness of the film material is 17 mass%. The mass was 0.48 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Comparative Example 1)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a bulky processed yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name TDE300) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 18 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As a resin to be coated, vinyl chloride-acrylic acid ester copolymer emulsion B (vinyl chloride unit / acrylic acid ester unit mass ratio 50/50, solid content 43% by mass, Viniblan (registered trademark) 271) was prepared. The obtained glass fiber woven fabric was immersed in the resin emulsion so that the ratio of the mass of the resin (g / m ² ) to the mass of the obtained film material (g / m ² ) was 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 18/25 mm, the thickness of the glass fiber woven fabric was 0.43 mm, and the warp spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin is 80 g / m ² , and the ratio of the mass of the resin (g / m ² ) to the mass of the film material (g / m ² ) is 17. Mass%, the ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) is 83 mass%, the mass of the film material is 460 g / m ² , and the thickness of the film material is 0. It was 6 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Comparative Example 2)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 21 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As a resin to be coated, vinyl chloride-acrylic acid ester copolymer emulsion B (vinyl chloride unit / acrylic acid ester unit mass ratio 50/50, solid content 43% by mass, Viniblan (registered trademark) 271) was prepared. The obtained glass fiber woven fabric was immersed in the resin emulsion so that the ratio of the mass of the resin (g / m ² ) to the mass of the obtained film material (g / m ² ) was 17% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31 pieces / 25 mm, the weaving density in the weft direction was 21 pieces / 25 mm, the thickness of the glass fiber woven fabric was 0.3 mm, and the warp spacing of the glass fiber woven fabric was The gap between the gaps exceeds 0.5 mm, the mass of the resin is 55 g / m ² , the ratio of the mass of the resin (g / m ² ) to the mass of the film material (g / m ² ) is 17 mass%, and the film material The ratio of the mass (g / m ² ) of the glass fiber woven fabric to the mass (g / m ² ) was 83 mass%, the mass of the film material was 325 g / m ² , and the thickness of the film material was 0.31 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Comparative Example 3)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 23 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As a resin to be coated, vinyl chloride-acrylic acid ester copolymer emulsion B (vinyl chloride unit / acrylic acid ester unit mass ratio 50/50, solid content 43% by mass, Viniblan (registered trademark) 271) was prepared. The obtained glass fiber woven fabric was immersed in the resin emulsion so that the ratio of the mass of the resin (g / m ² ) to the mass of the obtained film material (g / m ² ) was 16% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 23/25 mm, the thickness of the glass fiber woven fabric was 0.3 mm, and the warp spacing of the glass fiber woven fabric was The gap between the gaps exceeds 0.5 mm, the mass of the resin is 55 g / m ² , the ratio of the mass of the resin (g / m ² ) to the mass of the film material (g / m ² ) is 16 mass%, and the film material The ratio of the mass (g / m ² ) of the glass fiber woven fabric to the mass (g / m ² ) was 84 mass%, the mass of the film material was 335 g / m ² , and the thickness of the film material was 0.31 mm. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Comparative Example 4)
(Preparation of fiberglass fabric)
First, a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a warp, and a combined twisted yarn manufactured by Unitika Glass Fiber Co., Ltd. (trade name ECDE75 1 / 2.8S) was prepared as a weft. Using the above warp and weft, weaving was performed with a plain weave structure so that the warp density was 31 threads / 25 mm and the weft density was 25 threads / 25 mm to obtain a glass fiber woven fabric.

(Resin composition coating)
As a resin to be coated, vinyl chloride-acrylic acid ester copolymer emulsion B (vinyl chloride unit / acrylic acid ester unit mass ratio 50/50, solid content 43% by mass, Viniblan (registered trademark) 271) was prepared. The obtained glass fiber woven fabric was immersed in the resin emulsion so that the ratio of the mass of the resin (g / m ² ) to the mass of the obtained film material (g / m ² ) was 16% by mass. The glass fiber woven fabric was squeezed with a nip roll and dried under the conditions of a temperature of 150 ° C. and a time of 3 minutes to obtain the film material of the present invention. In the obtained film material, the weaving density in the warp direction of the glass fiber woven fabric was 31/25 mm, the weaving density in the weft direction was 25/25 mm, the thickness of the glass fiber woven fabric was 0.3 mm, and the warp spacing of the glass fiber woven fabric was The gap between the wefts and the gap between the wefts is 0.5 mm or less, the mass of the resin is 55 g / m ² , and the ratio of the mass of the resin (g / m ² ) to the mass of the film material (g / m ² ) is 16. Weight%, ratio of the mass of the glass fiber fabric (g / m ² ) to the mass of the film material (g / m ² ) 84 mass%, the mass of the film material is 345 g / m ² , the thickness of the film material is 0.31 mm. Met. The content of the plasticizer in the obtained membrane material was 5 parts by mass or less with respect to 100 parts by mass of the vinyl chloride-acrylic acid ester copolymer.

(Evaluation of membrane material)
The following evaluations were made on the membrane materials of Examples and Comparative Examples.

(1) Bending characteristics (gf · cm ² / cm) of the membrane material measured by KES FB-2 PUREBENGINGTESTER in the weft direction and the warp direction of the glass fiber woven fabric.
It was measured by the method described above.

(2) Vertically incident sound absorption coefficient of the film material The sound absorption coefficient was measured by the method described above.

(3) Nonflammability of film material According to 4.10.2 heat generation test / evaluation method in "Fireproof performance test / evaluation work method manual" (changed version on March 1, 2014) of Building Materials Testing Center. In the heat generation test in which the surface of the sheet is irradiated with radiant heat of 50 kW / m ² from the radiant electric heater to be measured, (I) for 20 minutes after the start of heating, the maximum heat generation rate is continuously 200 kW / m ² for 10 seconds or more. (II) The total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less, and (III) for 20 minutes after the start of heating, there is no through hole of 0.5 mm square or more. )-(III), if any of the three requirements is not satisfied, it is evaluated as x.

(4) Occurrence of wrinkles during installation when a membrane material containing glass fiber woven fabric is suspended in the warp direction Membrane materials cut out to a length of 2 m and a width of 50 cm are placed at intervals of 1.8 m. The film material was placed on a rod with a clip and suspended in the warp direction to evaluate the occurrence of wrinkles. Evaluation was made according to the following criteria, and a score of Δ or higher was regarded as acceptable.
◯: There were no wrinkles generated in the warp direction, and there was no problem in practical use.
Δ: Wrinkles were generated in the warp direction, but there was no problem in practical use.
X: Remarkably wrinkled in the warp direction, which was a practically problematic level.

(5) Occurrence of slack at the end (the part corresponding to the ear of the glass fiber woven fabric) when the film material containing the glass fiber woven fabric is suspended in the warp direction. Length 2 m, width 50 cm. The film material cut out in the above was sandwiched between rods placed at 1.8 m intervals with a clip, and the film material was placed in a state of being suspended in the warp direction to evaluate the slack generated at the end. Evaluation was made according to the following criteria, and a score of Δ or higher was passed. ○: There was no slack at the edges, and there was no problem in practical use.
Δ: There was slack at the end, but there was no problem in practical use.
X: Sagging occurred at the end, which was a practically problematic level.

(6) Bondability by High Frequency Dielectric Heating Using YPO-5A manufactured by Yamamoto Vinita Co., Ltd., the peelability was evaluated when bonding was performed at a current of 5A, an iron plate temperature of 100 ° C., and a bonding time of 4 seconds. Evaluation was made according to the following criteria, and 2 or more were accepted.
3: Even if it was peeled off by hand, it did not peel off at all, and there was no problem in practical use.
2: If you try to peel it off by hand, it will peel off, but it was at a level that was not a problem in practice.
1: It was not adhered and was at a practically problematic level.

(7) Ease of whitening when bending stress is repeatedly applied to the membrane material JIS R 3420: 2013 7.14 The test was conducted in accordance with "Cross folding resistance", and the bending portion of the membrane material test piece was tested. The presence or absence of white lines caused by bending was visually observed, and evaluation was made based on the number of times the white lines were confirmed. To check for the presence of white lines, fold the sheet 5 times, 10 times, 20 times, 30 times, 40 times, 50 times, 60 times, 70 times, 80 times, 90 times, and 100 times with a black mount. I installed it on top of it. Further, the n number of the test pieces was set to 3, and the evaluation was made based on the average value thereof. It is evaluated that the larger the number of reciprocating bends, the more the sheet is suppressed from whitening even when the bending stress is repeatedly applied. Then, it was evaluated according to the following criteria.
5: White line does not appear even if the number of bends is 100. 4: The number of bends is 100 or less 3: The number of bends is 50 or less 2: The number of bends is 20 or less 1: The number of bends is 5 or less

(8) Sustainability of the effect of suppressing the occurrence of wrinkles during mounting The membrane material was exposed to 200 hours in accordance with JIS K 7350-4. The test conditions were a black panel temperature of 63 ° C., a humidity of 50%, and no water spray. The color of the exposed surface and the opposite surface were measured with a color difference meter "CR300" manufactured by Konica Minolta Co., Ltd., and the color difference ΔE * ab was determined by the method of JIS Z 8730: 2009 7.1.1. Then, it was evaluated according to the following criteria. 2 or more were accepted as those that can suppress the deterioration of the resin composition and can maintain the effect of suppressing the generation of wrinkles at the time of attachment.
3: ΔE * ab is less than 2.0 2: ΔE * ab is 2.0 or more and less than 3.0 1: ΔE * ab is 3.0 or more

The results obtained are shown in Table 1.

The film material of Examples 1 to 9 is a film material containing a glass fiber woven fabric and a resin composition coated or affixed to the glass fiber woven fabric, and the film measured by KES FB-2 PUREBENGINGTESTER. Since the bending property of the material in the weft direction of the glass fiber woven fabric is 24 gf · cm ² / cm or more and the resin composition contains a white pigment, the film material containing the glass fiber woven fabric is suspended in the warp direction. It was confirmed that it is possible to suppress the occurrence of wrinkles at the time of mounting in the case of using a glass fiber ceiling, and it is possible to maintain the effect of suppressing the occurrence of the wrinkles.

Among them, the film materials of Examples 1, 2, 4, 5 and 9 have a bending characteristic of the film material measured by KES FB-2 PUREBENGINGTESTER in the weft direction of the glass fiber woven fabric of 30 to 50 gf · cm ² . Since it is / cm and the gap between the warp threads and the gap between the weft threads is 0.5 mm or less, a film ceiling in which a film material containing a glass fiber woven fabric is suspended in the warp direction is used. It was possible to achieve both nonflammability and suppression of wrinkles along the warp direction at the time of mounting.

Comparing Examples 3 and 6, the bending characteristics (gf · cm ² / cm) in the warp direction are the same, but the evaluation of the slack at the end when the membrane ceiling is suspended in the warp direction. Was superior in Example 6. This is because Example 6 has a relatively low warp density and a lighter film material mass. On the other hand, in Example 6, the warp density was relatively low, and the gap between the warps of the glass fiber woven fabric exceeded 0.5 mm, resulting in inferior nonflammability. However, according to Examples 1, 2, 4, 5 and 9, as a result of relatively increasing the warp density and setting the gap between the warp and the gap between the wefts to 0.5 mm or less, the film material Although the mass was the same as that of Example 3, the bending characteristic of the glass fiber woven fabric in the warp direction was 25 to 35 gf · cm ² / cm. It was easier to make the part less slack and nonflammable.

On the other hand, the film materials of Comparative Examples 1 to 4 had a softer resin than those of Examples 1 to 9, and the bending characteristics of the glass fiber woven fabric in the weft direction were less than 24 gf · cm ² / cm. Even when a film ceiling containing a glass fiber woven fabric is suspended in the warp direction, the occurrence of wrinkles along the warp direction cannot be suppressed. Further, in the film materials of Comparative Examples 1 to 4, since the resin composition coated or attached to the glass fiber woven fabric does not contain a white pigment, the film material is used as the film ceiling in the indoor space, and the film ceiling is used. It was also confirmed that when the resin composition was installed below the mercury lamp, the resin composition deteriorated due to the influence of the illumination light, and it became difficult to maintain the effect of suppressing the generation of wrinkles at the time of installation.

Claims (8)

A film material containing a glass fiber woven fabric and a resin composition coated or affixed to the glass fiber woven fabric.
The bending characteristic of the film material measured by KES FB-2 PUREBENGINGTESTER in the weft direction of the glass fiber woven fabric is 24 gf · cm ² / cm or more.
A film material in which the resin composition contains a white pigment. The membrane material according to claim 1, wherein the membrane material measured by KES FB-2 PUREBENGINGTESTER has a bending characteristic of the glass fiber woven fabric in the warp direction of 10 to 40 gf · cm ² / cm. The ratio of the bending characteristics in the weft direction of the glass fiber woven fabric to the bending characteristics in the warp direction of the glass fiber woven fabric (bending characteristics in the weft direction of the glass fiber woven fabric / bending characteristics in the warp direction of the glass fiber woven fabric) is 1.1 to The film material according to claim 1 or 2, which is 1.6. The film material according to any one of claims 1 to 3, wherein the ratio of the mass (g / m ² ) of the resin composition to the mass (g / m ² ) of the film material is 12 to 25% by mass. .. The membrane material according to any one of claims 1 to 4, wherein the glass fiber woven fabric has a plain weave structure. The film material according to any one of claims 1 to 5, wherein the resin constituting the resin composition is an amorphous thermoplastic resin. A membrane ceiling comprising the membrane material according to any one of claims 1 to 6. The membrane ceiling according to claim 7, wherein the membrane material is arranged in a state of being freely suspended in the warp direction of the glass fiber fabric.

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