JP2017020295A - Sound absorbing membrane material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a membrane material suitable for membrane ceiling construction of an indoor stadium, a gymnasium, an indoor pool, an event hall, a public hall, a ceremonial hall, a station building, an airport, a shopping mall, or the like, which is excellent in membrane material strength and sound absorbing effect, with light weight property and incombustibility, as a ceiling area constituting membrane material (membrane ceiling) installed on a ceiling of a building and a ceiling accessory (aerial membrane).SOLUTION: A sound absorbing membrane material is a fabric of void rate being 5% or less, including a resin coating yarn and multifilament yarn in knitting element. A specific gravity difference between the resin coating yarn and the multifilament yarn is 0.25 or larger, while, an occupied volume ratio of both yarns is 4:1-1:1. Especially, in a mode of single layer fabric, double fabric, or triplex fabric, a cross section of especially the resin coating yarn is flat, and the resin coating yarn has thermal expansion property especially.SELECTED DRAWING: Figure 1

Description

  The present invention is an indoor stadium, gymnasium, indoor pool, event hall, public hall, ceremonial hall, station building, airport, shopping mall, etc. As a ceiling accessory (aerial film), it has non-combustibility in accordance with the Building Standards Act, and has lightness and flexibility that are unlikely to cause serious human damage even if the ceiling collapses in case of an earthquake. In particular, the present invention relates to a membrane material that is excellent in sound absorbing effect without being unevenly distributed with respect to noise in general, and can be applied to partitions, blinds, awning tents, etc. in addition to ceiling applications.

  Patent Document 1 discloses a double woven glass cloth having an opening ratio of 0.02 to 1.0%, which is a glass cloth yarn not subjected to a bulky process and a glass fiber thread subjected to a bulky process in a specific ratio as a glass cloth for a membrane ceiling. Is disclosed, and is non-flammable and light-shielding, and is particularly excellent in sound absorption in a low-frequency region (human voice). The glass ceiling glass cloth disclosed in Patent Document 1 has an insufficient sound absorbing effect especially for noise in a high frequency region. Therefore, currently, there is an excellent non-uniform sound absorbing effect for noise in general and a nonflammable film ceiling fabric. It is desired.

Japanese Patent No. 5461168

  The present invention has a nonflammability according to the Building Standard Act as a ceiling area constituting membrane material (membrane ceiling) and sound absorbing membrane material or ceiling accessory (aerial membrane) installed on the ceiling of a building, and is prepared for an earthquake disaster. In the unlikely event that the ceiling collapses, it has lightness and flexibility that are unlikely to cause serious human damage, and is particularly excellent in noise absorption without being unevenly distributed with respect to noise in general. It is also possible to build indoor ceilings, gymnasiums, indoor pools, event halls, public halls, ceremonial occasions, station buildings, airports, shopping malls, etc. for membrane ceiling construction, optical ceiling membrane construction, and even partitions and blinds An object is to provide a sound-absorbing film material that can also be applied to sun tents and the like.

  In order to solve the above-mentioned problems, in a woven fabric including resin-coated yarn and multifilament yarn in a woven or knitted element, a specific volume occupation ratio of the resin-coated yarn and multifilament yarn having different specific gravities is specified. In particular, a single-layer woven fabric, a double-woven fabric, or a triple-woven fabric, a flat cross section of the resin-coated yarn, and a thermally expandable resin-coated yarn Thus, the obtained membrane material for the ceiling area (membrane ceiling) or the textile membrane material as a ceiling accessory (aerial membrane) has sufficient strength as a membrane ceiling, and the ceiling collapsed in case of earthquake disaster Lightweight and non-flammable, which is unlikely to cause serious human damage in some cases, and is particularly excellent in sound absorption without being unevenly distributed with respect to noise in general. They have found that it is a function and have completed the present invention.

  That is, the sound-absorbing film material of the present invention is a woven fabric having a porosity of 5% or less including a resin-coated yarn and a multifilament yarn in a woven or knitted element, and has a specific gravity difference from the resin-coated yarn and the multifilament yarn. It is preferable that the occupied volume ratio of both yarns is 0.25 or more and 4: 1 to 1: 1. By using yarns having different specific gravities at a specific occupied volume ratio, the sound absorbing film material of the present invention can be obtained by exposing, hiding, or crossing three-dimensionally the yarns having different specific gravities in a woven fabric. A fine unit in which texture units with different sound absorption properties are randomly or regularly scattered on the entire surface to express a sound absorbing effect, that is, in contrast to resin-coated yarn and multifilament yarn, resin coating The yarn effectively absorbs sound in the lower frequency range than the multifilament yarn, and at the same time the multifilament yarn absorbs sound in the higher frequency region more effectively than the resin-coated yarn. Synergistic effects enable the creation of sound absorption effects over a wider range of noise. In the present invention, the resin-coated yarn and the multifilament yarn may have a sound-absorbing effect in a common frequency region depending on the specific gravity difference between them. For example, as the specific gravity difference is smaller, the common frequency region is increased, and as the specific gravity difference is larger, the common frequency region is decreased. Therefore, in order to further enhance the effect of the sound absorbing film material of the present invention, it is preferable that the sound absorption frequency regions of the resin-coated yarn and the multifilament yarn are different from each other, but this is not restrictive.

  In the sound-absorbing membrane material of the present invention, the woven or knitted element is 1) a warp group and a weft group, or 2) a warp group and a left-upper / right-upward bias yarn group, and the woven fabric is a single layer. Any one selected from a woven fabric, a double woven fabric, and a triple woven fabric is preferable. These woven fabrics woven with yarns having different specific gravities have the effect that the yarns of different specific gravities are exposed, hidden, or confounded three-dimensionally in a woven unit, so that the sound absorbing film material of the present invention has a sound absorbing property on the entire surface. The sound absorption effect is expressed by the complicated interspersing of different texture units (random arrangement or regular arrangement), that is, the resin coated yarn is more effective in the lower frequency region than the multifilament yarn. At the same time, the multifilament yarn has a synergistic effect of effectively absorbing the sound in a higher frequency range than the resin-coated yarn, thereby enabling the sound absorption effect to be exerted on a wider range of noise.

In the sound absorbing film material of the present invention, it is preferable that the resin-coated yarn has a flat elliptical cross section, and the ratio of height: width in the flat elliptical cross section is 3: 4 to 1: 4. As a result, the sound absorption effect can be further improved.

In the sound-absorbing film material of the present invention, the resin-coated yarn is composed of a multifilament yarn and a resin coating layer, the resin coating layer has a thermal expansion property, and the porosity after the thermal expansion is 1%. It is preferable to block the following. As a result, the sound absorption effect is improved and at the same time the flame heat from the fire (simulated when the radiant heat of 50 kW / m ² is applied to the sound absorbing film material by the cone calorimeter test (ASTM-E1354)) Non-combustible in accordance with the Building Standards Act by blocking the penetration of flames and leakage of toxic gases through the action of blocking the volume of the coating to promote clogging of the fabric and blocking the porosity of the sound absorbing membrane material to 0 to 1%. A sound-absorbing film material having properties.

In the sound absorbing film material of the present invention, it is preferable that the resin coating layer mainly contains a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles. Improve sound absorption effect by including layered inorganic compound, and at the same time, with flame heat due to fire (simulated when radiant heat of 50 kW / m ² is applied to sound absorbing film material by cone calorimeter test (ASTM-E1354)) Molybdenum compounds block the penetration of flame and leakage of toxic gases by the action of blocking the volume of the resin-coated yarn volume to promote clogging of the fabric and closing the porosity of the sound-absorbing membrane material to 0 to 1%. By forming a residue layer (chlorine-molybdenum composite oxide) that hardens the combustion carbide by the action of particles, it prevents non-combustibility in accordance with the Building Standards Act by maintaining the interruption of flame penetration and toxic gas leakage for a long time. A sound-absorbing film material having properties.

In the sound-absorbing film material of the present invention, a bubble-containing resin layer having a density of 0.35 to 0.75 g / cm ³ is formed on one side of the fabric, and a part of the bubble-containing resin layer enters the fabric structure, The depth is preferably 1 to 35% with respect to the thickness of the fabric. As a result, the sound absorption can be further improved.

  In the sound absorbing film material of the present invention, it is preferable that the bubble-containing resin layer mainly contains a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles. As a result, the sound absorption effect is improved, and at the same time, the layered inorganic compound expands in volume due to the heat of the flame during a fire, blocking the penetration of the flame and the leakage of toxic gas, and the residue of the combustion compound is strengthened by the action of the molybdenum compound particles. By forming a layer (chlorine-molybdenum composite oxide), it is possible to obtain a sound-absorbing film material that has nonflammability according to the Building Standards Law by maintaining the interruption of flame penetration and toxic gas leakage for a long time.

  According to the present invention, a ceiling area constituting membrane material (membrane ceiling) and a sound absorbing membrane material installed on the ceiling of a building, or a ceiling area constituting member attached material is provided with a non-combustible membrane material according to the Building Standard Act, In the unlikely event of a disaster, by using a woven fabric woven with yarns having lightness and flexibility that are unlikely to cause serious human damage even if the ceiling collapses, and having different specific gravity, The yarns with different specific gravity are exposed, hidden or three-dimensionally crossed by the texture unit, so that the texture units with different sound absorption are randomly or regularly scattered on the entire surface of the sound absorbing film material of the present invention. The unit constitutes a sound absorbing effect, especially the sound absorbing effect in the low frequency region below about 1000 Hz due to the resin-coated yarn portion, and the medium to high frequency region above about 1000 Hz due to the multifilament yarn portion. By simultaneously expressing the sound absorption effect at the same time, it is excellent in sound absorption effect without being unevenly distributed with respect to the overall noise, and also can be produced by lighting and video projection, so indoor stadium, gymnasium, indoor pool, event hall, public hall It can also be applied to partitioning, blinds, awning tents, etc., as well as for membrane ceiling construction and optical ceiling membrane construction for ceremonial occasions, station buildings, airports, shopping malls, etc.

The figure which shows typically an example of the woven / knitting element of the sound-absorbing film material of this invention The figure which shows typically an example of the woven / knitting element of the sound-absorbing film material of this invention The figure which shows typically an example of the cross section of the sound-absorbing film material of this invention The figure which shows typically an example of the cross section of the sound-absorbing film material of this invention

  The sound-absorbing membrane material of the present invention is a woven fabric having a porosity of 5% or less (the total occupation ratio of hole-like gaps generated at a woven-knitting intersection) including resin-coated yarn and multifilament yarn in a woven / knitted element. Single layer fabric, double fabric, or triple fabric in which the specific gravity difference between the coated yarn and the multifilament yarn is 0.25 or more and the occupied volume ratio of both yarns is 4: 1 to 1: 1. is there. By using two kinds of yarns having different specific gravities at a specific occupied volume ratio, the yarns woven by weaving are exposed, hidden, or complicatedly entangled. Therefore, it is possible to express an excellent sound absorbing effect by the fine structure in which the texture units having different sound absorption properties are scattered on the entire surface of the sound absorbing film material, that is, in the contrast between the resin coated yarn and the multifilament yarn, The multi-filament yarn effectively absorbs sound in the lower frequency range than the multifilament yarn, while the multi-filament yarn effectively absorbs sound in the higher frequency region than the resin-coated yarn. This makes it possible to produce a sound absorption effect for a wider range of noise. This effect is evaluated by Noise Reduction Coefficient (NRC value) according to JIS A1405 (normal incidence method). (NRC values are arithmetic average values of the respective sound absorption rates of 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz.) In the present invention, the resin-coated yarn and the multifilament yarn have sound absorption in a common frequency region depending on the specific gravity difference between them. You may have an effect. For example, as the specific gravity difference is smaller, the common frequency region is increased, and as the specific gravity difference is larger, the common frequency region is decreased. Therefore, in order to further enhance the effect of the sound absorbing film material of the present invention, it is preferable that the sound absorption frequency regions of the resin-coated yarn and the multifilament yarn are different from each other, but this is not restrictive. The fracture strength and tear strength of the film material obtained by the arrangement (woven / knitted element) including such resin-coated yarns are effectively improved. When the occupied volume of the resin-coated yarn is out of the above ratio range, for example, in a film material in which the above ratio is 1: 2, the sound absorbing effect in a low frequency region of less than about 1000 Hz may be lowered. The resin-coated yarn includes a multifilament yarn provided with a resin coating layer, and includes an embodiment in which the entire multifilament yarn is impregnated with resin, or a portion of the multifilament yarn is impregnated with resin. As the resin-coated yarn and the multifilament yarn, in order to make the sound-absorbing film material of the present invention have sufficient incombustibility, glass fiber (specific gravity 2.49 to 2.55), silica fiber (specific gravity 2.15) To 2.2), alumina fiber (specific gravity 3.0 to 3.6), silica alumina fiber (specific gravity 2.5 to 3.0), basalt fiber (specific gravity 2.6 to 2.8), carbon fiber (specific gravity) It is preferable to use non-combustible fibers such as inorganic fibers such as 1.73 to 1.8) and metal fibers such as stainless steel fibers (specific gravity 4.6), but poly pphenylene terephthalamide fibers, poly p benzamide fibers, Aramid fiber (specific gravity 1.3 to 1.45) such as p-phenylene 3,4 oxydiphenylene terephthalamide copolymer fiber, poly-p-phenylenebenzimidazole fiber (specific gravity 1.3 to 1.45), poly-p Nylene benzoxazole fiber (specific gravity 1.5-1.6), poly-p-phenylenebenzthiazole fiber (specific gravity 1.5-1.6), polyether ether ketone fiber (specific gravity 1.69), polysulfone fiber (specific gravity 1) .24) may be used, or may be used in combination with the non-combustible fibers described above. Similarly, the above-mentioned noncombustible fiber and heat resistant fiber include polypropylene fiber (specific gravity 0.9), polyethylene fiber (specific gravity 0.92), polyester fiber (specific gravity 1.38), nylon fiber (specific gravity 1.14). ) And synthetic fibers such as vinylon fibers (specific gravity 1.27) can also be mixed. Short fiber spun yarns such as non-combustible cotton (specific gravity around 1.6) and non-combustible kenaf (specific gravity around 1.5) in which the hydroxyl group of cellulose is borated, phosphoric or silicated In combination with the above, or a yarn blended with the above-mentioned non-combustible fiber, heat-resistant fiber, synthetic fiber, and short fiber spun yarn is also effective.

  In the resin-coated yarn and the multifilament yarn, the multifilament yarn is a yarn having a filament diameter of 3 to 10 μm and a fineness of 69 to 2223 dtex, particularly 138 to 1112 dtex, and having 50 to 500 filaments, particularly 100 to 300 filaments. It is a yarn that is bundled and bundled into a non-twisted yarn or a twisted yarn, and the cross-sectional shape is circular, elliptical, and flat (an elliptical shape that is crushed horizontally). Multifilament yarn is preferred. Similarly, a resin-coated yarn using a multifilament yarn having a flat elliptical cross section has a flat elliptical cross section, and the ratio of height: width in the flat elliptical cross section of the resin-coated yarn is from 3: 4 to 1: 4. A flat ellipse of 2: 3 to 2: 5 is preferable for improving sound absorption by JIS A1405 (normal incidence method), and at the same time, a film material obtained by including a resin-coated yarn having a flat elliptical cross section is 1000 Hz. The following sound absorbing effect is further improved. Since the specific gravity of the multifilament yarn includes a gap that converges 50 to 500 filaments, the specific gravity of each fiber described in paragraph [0015] is 0.65 to 0 depending on the gap content. The value obtained by multiplying by .97 is the apparent specific gravity, but the specific gravity measured directly from the multifilament yarn is most appropriate. In particular, multifilament yarns with an apparent specific gravity obtained by multiplying the specific gravity of the fiber by 0.65 to 0.85 are bulky yarns in which filaments are intertwined with a gap, and these are Taslan processed yarn and interlaced yarn. , Wooly yarn and so on. Specifically, when producing multifilament yarns, filament opening (defibration) is performed by air jet entanglement using a Taslan nozzle, and entrainment and entanglement are forced in a turbulent vortex to make it random and loose It is a yarn that has become bulky by forming many entanglements, loops, spiral coils, and knots. Alternatively, it may be a crimped (core-sheath) filament, or a (core-sheath) bulky yarn obtained by entanglement between crimped (core-sheath) filaments. When sound is incident on a fibrous material with continuous space (a material with a large surface area), such as a bulky yarn, especially multi-filament yarn, the sound causes irregular reflection in the small space, friction and resistance with the filament, A part of sound energy is consumed as heat energy by vibration of the filament. The apparent specific gravity of the resin-coated yarn is: the specific gravity of the multifilament (bulky) yarn x the volume occupation ratio of the multifilament (bulky) yarn, and the specific gravity of the resin (impregnated) coating layer x the volume of the resin (impregnated) coating layer. It is the sum of the occupation ratio. Here, the sum of the volume occupancy of the multifilament (bulky) yarn and the volume occupancy of the resin (impregnated) coating layer is 1.0, but the specific gravity measured directly from the resin coated yarn is most appropriate. The (apparent) specific gravity difference between the above-mentioned resin-coated yarn and multifilament yarn is 0.25 or more, and preferably 0.45 or more is excellent in the expression of the sound absorption effect.

  When the core yarn of the resin-coated yarn and the multifilament yarn are multifilament yarn made of glass fiber, the glass fiber is E (no alkali) glass, C (containing alkali) glass, G glass, A glass, S glass. Any glass composition such as D glass or DE glass may be used, and the surface modification treatment with a silane coupling agent is applied to the glass fiber, so that the adhesion with the resin coating layer constituting the resin coating yarn It is preferable in terms of improvement. Specific examples of the silane coupling agent include vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-acryloxypropyltrimethoxysilane, and 3-amino. One or more selected from propyltrimethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, 3-glycidoxypropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane and the like In addition, organic titanate compounds may be used.

The resin coating layer of the resin-coated yarn has thermal expansibility, and flame heat due to fire (simulated when radiant heat of 50 kW / m ² is applied to the sound-absorbing film material by cone calorimeter test (ASTM-E1354)) The sound-absorbing film material has non-combustibility according to the Building Standards Act by blocking the penetration of the flame and leakage of toxic gas by the action of expanding the volume of the sound-absorbing film to close the porosity of the sound-absorbing film material to 0 to 1%. . In order to make the resin coating layer of the resin-coated yarn thermally expandable, the resin coating layer contains 1.5 to 10% by mass of a layered inorganic compound, and the layered inorganic compound includes smectite clay mineral, synthetic smectite, sericite. One or more selected from sites, fluorine mica, and expanded graphite are used. Such a resin coating layer mainly contains a layered inorganic compound based on a thermoplastic resin, and has a specific gravity of 1.3 to 2.5 of the resin coating layer. The thermoplastic resin component used in the resin coating layer constituting the resin-coated yarn is a vinyl chloride resin (a soft composition containing 30 to 100 parts by mass of a plasticizer with respect to 100 parts by mass of the vinyl chloride resin), vinyl chloride. Copolymer resin, olefin resin, olefin copolymer resin, urethane resin, urethane copolymer resin, acrylic resin, acrylic copolymer resin, vinyl acetate resin, vinyl acetate copolymer resin, styrene resin , Styrene copolymer resin, polyester resin, polyester copolymer resin, fluororesin (polytetrafluoroethylene), fluorocopolymer resin, etc. can be used, and the thermoplastic resin of the resin coating layer is different. A plurality of types of resin-coated yarns can be used in combination.

  Examples of layered inorganic compounds include smectite clay minerals, synthetic smectites, sericite, fluorinated mica, and expanded graphite, all of which have the property of volume expansion by heat. These layered inorganic compounds are resin-coated layers. It is preferable to contain 1.5-10 mass% with respect to. The smectite clay mineral is 2: 1 type smectite, and a layer composed of silicon and oxygen (silica tetrahedral layer) sandwiches a layer composed of aluminum and oxygen (aluminum octahedral layer), “silica tetrahedral layer / The “aluminum octahedral layer / silica tetrahedral layer” structure layer is a unit, and the structure layers are stacked. Specific examples of dioctahedral smectite include montmorillonite, beidellite, nontronite, and specific examples of trioctahedral smectite include saponite, hectorite, soconite, and stevensite. The synthetic smectite has a structure in which a silica tetrahedral (tetracoordinate) layer and an aluminum octahedral (hexacoordinate) layer are alternately stacked, and a mass ratio of silica / aluminum is preferably 2: 1. Sericite (sericite) is fine muscovite and has an average particle diameter of 1 to 20 μm. As the fluorine mica, fluorine tetrasilicon mica having an average particle diameter of 1 to 20 μm obtained by organic exchange treatment of Na tetrasilicon mica can be used. Further, an intercalation type layered compound in which a quaternary ammonium compound is substituted and modified between layers of a smectite clay mineral (such as montmorillonite) can also be used. For expanded graphite, natural graphite can be treated with concentrated sulfuric acid, nitric acid, selenic acid, etc. and concentrated nitric acid, perchlorate, permanganate, dichromate, etc., and these have a graphite-like layer structure. Since it is a crystalline compound, it expands with a gas generated by heat to form a nonflammable carbonized layer.

  In particular, the resin coating layer of the resin-coated yarn preferably contains a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles as main components, and a vinyl chloride resin (plasticizer with respect to 100 parts by mass of the vinyl chloride resin). Soft composition containing 30 to 100 parts by mass) It is preferable that the layered inorganic compound is contained in an amount of 1.5 to 10 parts by mass and the molybdenum compound particles are contained in an amount of 1.5 to 10 parts by mass with respect to 100 parts by mass. As molybdenum compound particles, molybdenum trioxide, molybdic acid, phosphomolybdic acid, molybdenum disulfide, sodium molybdate, hexaammonium molybdate, diammonium molybdate, calcium molybdate, zinc zinc molybdate, potassium molybdate, molybdic acid Residue layer (chlorine) that strengthens the combustion carbide of these chlorine-containing resins, especially when used in combination with chlorine-containing resins (vinyl chloride resin, soft vinyl chloride resin, vinylidene chloride resin, chlorinated polyethylene), etc. -Molybdenum composite oxide) can increase non-combustibility according to the Building Standards Act by increasing the blocking rate of flame penetration and toxic gas leakage.

  In addition, flame retardant particles can be used in combination with the resin coating layer. Phosphorus atom-containing compounds such as metal phosphates, metal organic phosphates, phosphoric acid derivatives, ammonium polyphosphates, and ammonium polyphosphate derivatives (such as melamine-modified products), b). Nitrogen-containing compounds such as (iso) cyanurate compounds, (iso) cyanuric acid compounds, guanidine compounds (such as dicyandiamide), urea compounds (such as dimethylolurea), and derivative compounds thereof (eg, melamine cyanurate) C). Metal hydroxide (such as aluminum hydroxide), metal oxide (such as antimony oxide), metal carbonate compound (such as basic magnesium carbonate), metal sulfate compound (such as barium sulfate), boric acid compound (such as zinc borate) ), And inorganic compounds such as inorganic compound composites (hydrotalcite, etc.), d). One or more selected from a bromine-substituted organic compound and a chlorine-substituted organic compound.

  In the resin-coated yarn, the thickness of the resin coating layer is preferably 0.03 mm to 0.5 mm, particularly preferably 0.05 mm to 0.3 mm. On the other hand, the resin-coated yarn is provided with a resin coating layer on the entire surface of the multifilament core yarn, and includes a mode in which the entire multifilament core yarn is impregnated with resin, or a part of the multifilament core yarn is impregnated with resin. . In this embodiment, the mass ratio between the multifilament core yarn and the resin coating layer is 3: 1 to 1: 2, preferably 3: 2 to 2: 3. Particularly preferred resin coating layers in the present invention include vinyl chloride resins (including soft to semi-rigid vinyl chloride resins containing plasticizers, stabilizers, flame retardants, etc.) and styrene copolymer resins (including flame retardants). ), Urethane copolymer resins (containing a flame retardant, etc.), and thermoplastic resins such as fluorine copolymer resins. These thermoplastic resins are used in an extrusion molding machine in which multifilament yarns are cored through a coating die die, and the thermoplastic resin is extruded in a hot melt state from the die nozzle hole of the coating die, and at the same time, the fiber yarn is taken up. The resin-coated yarn is obtained by continuously coating the surface of the multifilament core yarn with the resin coating layer. Also, the multifilament core yarn is dipped into a viscous liquid such as vinyl chloride resin paste sol, a flame retardant resin solution solubilized in an organic solvent, or an aqueous resin-based flame retardant composition such as emulsion or latex. The resin-coated yarn may be obtained by drying with heat treatment. These resin coating layers include organic pigments, inorganic pigments, pearl powder pigments, aluminum powder pigments, glitter pigments, phosphorescent pigments, fillers, UV absorbers, deterioration inhibitors, adhesives, antifungal agents, as necessary. Known additives such as antibacterial agents, insect repellents, antistatic agents, and fragrances can be included.

Examples of woven and knitted elements that include resin-coated yarns and multifilament yarns in the woven and knitted elements, and the occupied volume ratio of both yarns is 4: 1 to 1: 1. 1) Warp yarn groups and weft yarn groups, Or 2) The warp yarn group and the upper left and upper right bias yarn groups are any one of the single-layer fabric, the double fabric, and the triple fabric. In the case where the woven or knitted element is a warp yarn group and a weft yarn group, a mode in which both groups include resin-coated yarns and multifilament yarns arranged regularly or randomly, or resin-coated yarns are warp yarns A group can be exemplified by a mode in which multifilament yarns are properly used as weft yarn groups, or a mode in which these are opposite, and these are each a mode of single-layer fabric, double fabric, and triple fabric. Similarly, in the case of triaxial woven and knitted elements 2) Warp yarn group and left oblique upper and right oblique upper bias yarn group, resin coated yarn and multifilament yarn are regularly alternated in both groups. An embodiment including arrangement or random arrangement, an embodiment in which a resin-coated yarn is used as a warp yarn group, a multifilament yarn is used as a bias yarn group, or an opposite usage manner can be exemplified. In the case of any one of the double woven fabric and the triple woven fabric, the value when the sum of the pore gaps at the woven / knitting intersections of the woven / knitting elements 1) and 2) is defined as the porosity is 5% or less, particularly 2. 5% or less is preferable. When sound enters the hole gap, resonance vibration occurs at a specific frequency, air vibrates in the hole gap, and sound energy is attenuated. Therefore, the hole diameter of the hole gap is in the range of 0.05 to 1.0 mm. Preferably, the number of hole gaps is in the range of (vertical 8 × horizontal 8) to (vertical 60 × horizontal 60) /25.4 mm ² , especially ( vertical 12 × horizontal 12) and - (33 × width 33 length) of 25.4 mm ² peak higher the sound absorbing effect. Due to the woven and knitted elements made of yarns having different specific gravities from the hole gaps, the yarns having different specific gravities are exposed, hidden, or three-dimensionally crossed, so that the entire surface of the sound-absorbing membrane material of the present invention absorbs sound. A fine unit in which weave units with different properties are randomly or regularly interspersed to produce a sound absorption effect. Specifically, resin-coated yarns have a lower frequency range than multifilament yarns. The multifilament yarns are effective in absorbing sound in a higher frequency range than the resin-coated yarns. Make it possible.

Single-layer fabrics are plain fabrics, 2/2 Nanako (basket) fabrics, 2/2 cocoon fabrics, twill fabrics: 2/1 twill fabrics, 2/2 twill fabrics, 3/1 obliques (four sheets twill), 3 / 1 Torn text (4 sheets Aya), 3/2 Text (5 sheets Aya), 4/1 Text (5 sheets Aya), 5/1 Text (6 sheets Aya), 4/2 Text ( 6 sheets Aya), 1/3/1, 1 Oblique (6 sheets Aya), etc. Ako fabric: 2 jump 4/1 Auko (5 sheets Ako), 3 jump 4/1 Auko (5 sheets Auko), 2 jumps 3/2 Auko (5 sheets Auko), 3 Jump 3/2 Auko (5 sheets Auko), etc., and these changed plain fabrics, changed twill fabrics, changed satin fabrics, honeycomb fabric, pear fabrics, tearing obliques textile, day and night satin product, twisting the fabric (gauze fabric, Roori thereof), Nuito fabrics, such as Russell knitting can be used, they are mass 0.2~1.2kg / ^{m 2,} void ratio of 5% or less (textile intersection Of hole-like gaps Occupancy of the sum), preferably 2.5% or less, and an air permeability (JIS L1096: the Frazier method) 3~50cc / cm ² / sec, preferably exemplified those satisfying 10~25cc / cm ² / sec .

The double woven fabric is a woven fabric that overlaps the upper and lower two sheets using the front and back warp yarns and the front and back weft yarns, and the upper fabric has a porosity of 10 between the front warp yarn and the front weft yarn. % Or less (occupation ratio of the total pore clearance generated at the weaving and knitting intersection), and the lower woven fabric has a porosity of 10% or less between the back warp and the back weft (total of the pore clearance generated at the weaving and knitting intersection) ² ), a mass of 0.4 to 2.4 kg / m ² , a common void ratio of 5% or less (occupation ratio of the sum of overlapping portions of pore-shaped gaps generated in the stacked fabrics), preferably 2. Examples are those satisfying 5% or less and air permeability (JIS L1096: Fragil method) of 3 to 50 cc / cm ² / sec, preferably 10 to 25 cc / cm ² / sec. Similarly, the upper and lower fabrics are overlapped using upper / lower warp and front / back warp bias yarns, and the upper fabric has a porosity of 10% between the front warp and the front warp yarn. The following is made up (occupation ratio of the sum of the hole gaps generated at the weaving and knitting intersections), and the lower fabric has a void ratio of 10% or less between the back warp and the back diagonal threads (the sum of the hole gaps occurring at the weaving and knitting intersections) ), A mass of 0.4 to 2.4 kg / m ² , a shared porosity of 5% or less (a total occupancy ratio of overlapping portions of pore-shaped gaps generated in the stacked fabrics), preferably 1 to 1 Examples are those satisfying 2.5% and air permeability (JIS L1096: Fragil method) of 3 to 50 cc / cm ² / sec, preferably 10 to 25 cc / cm ² / sec. When the air permeability is less than 3 cc / cm ² / second, the echo suppression effect may be deteriorated, and when it exceeds 50 cc / cm ² / second, the sound absorption effect may be deteriorated. The common void ratio is that the sound-absorbing membrane material is placed horizontally, and when this is observed from the vertical direction, the void portion of the upper fabric and the void portion of the lower fabric overlap each other and pass through the two fabrics. Is the occupancy rate per unit area. In other words, the upper woven yarn is arranged to overlap the lower woven fabric gap, or the lower woven yarn is arranged to overlap the upper woven void, and the shared porosity becomes a small value, Apparently 0 depending on the degree of overlap. A warp double woven fabric is composed of a set of weft and warp warps and warp warps, and an extra warp thread is woven on the back of a single woven fabric. 2: 1, 3: 1, etc. A weft double woven fabric consists of a set of warps and wefts with a weft and back weaving and a single weaving with another weft, and the arrangement of wefts and wefts is 1: 1, 2: 1, 3: 1 and so on. The background double woven fabric is obtained by weaving two woven fabrics with the same loom, and connecting the upper and lower two woven fabrics (with a mass of 0.4 to 1.2 kg / m ² ) with the yarns.

Similarly, a triple woven fabric is a woven fabric in which three upper, middle, and lower fabrics are stacked using front, middle, and back warp yarns and front, middle, and back weft yarns. Each of the woven fabric and the lower woven fabric is composed of a void of 10% or less (occupation ratio of the total pore-shaped gap generated at the knitting intersection), and a mass of 0.2 to 1.0 kg / m ² , and a mass of 0.6 to 3. 0 kg / m ² shared porosity 5% or less (occupation ratio of the sum of overlapping portions of the pore-shaped gaps generated in the stacked fabric), preferably 2.5% or less, and air permeability (JIS L1096: Frazier method) 3 50 cc / cm ² / sec, preferably those satisfying 10~25cc / cm ² / sec, likewise through triple fabric (a set of tissue Omotekei, medium through-Urakei weft strip), weft triple fabric ( A set of warps, wefts, middle wefts, and back weaves)), weft triple woven fabrics: a) Weaving three woven fabrics with the same loom, and lower weaving with the woven yarns From the middle fabric to the upper fabric, b) from the upper fabric to the middle fabric, from the middle fabric to the lower fabric, c) from the upper fabric to the middle fabric Examples are those that are connected and connected from the lower fabric to the middle fabric, and d) only the ears of the upper, middle, and lower three fabrics are connected. When the air permeability is less than 3 cc / cm ² / second, the echo suppression effect may be deteriorated, and when it exceeds 50 cc / cm ² / second, the sound absorption effect may be deteriorated.

The double woven fabric is specifically a fly shuttle loom, air jet loom, slewer loom, rapier loom, water jet loom, etc. Aya) An upper woven fabric having a weave structure and a lower woven fabric having a 2/1 oblique (twill) weave structure composed of warp resin-coated yarns and weft multifilaments, and a lower resin warp resin-coated yarn The yarns are floated on the weft multifilament yarns of the upper fabric every predetermined number, and joined at the connection point. At the same time, the weft multifilaments of the lower fabric are floated on the warp resin-coated yarns of the upper fabric. This is a double woven fabric joined together at the connection points, and the connection points between the upper and lower fabrics should be 8-50 per square inch area. It is preferred. In the sound-absorbing membrane material using such a double woven fabric, the woven fabric has an upper fabric having a 2/1 oblique (twill) weave structure and a 2/1 oblique (weave) weave fabric. By forming a double woven fabric composed of a lower woven fabric having the structure of the upper fabric and the lower woven fabric, it is possible that the texture of the upper woven fabric and the lower woven fabric intersect and the voids of the respective woven fabrics do not completely overlap each other. The shared porosity is 5% or less (preferably 2.5% or less). This double woven fabric has a common porosity of 5% or less, and can satisfy an air permeability (JIS L1096: Frazier method) of 3 to 50 cc / cm ² / sec even when the apparent porosity is 0%. This is because the gap at the interface between the upper fabric and the lower fabric functions as a ventilation portion, and the space between the upper fabric and the lower fabric is three-dimensionally connected. Such a three-dimensional continuous ventilation portion effectively contributes to acoustic diffusion absorption. In addition, the woven intersection between the warp resin coated yarn and the weft resin coated yarn is fixed to each other by thermal adhesion, and is excellent in the form stability of the sound absorbing film material. Those with slight thermal adhesion make the sound-absorbing membrane material flexible. The fixing of the woven intersections by thermal adhesion may extend over the entire double woven fabric, or may be performed at equal intervals vertically or horizontally or at random partial woven intersections.

Similarly, in the triple woven fabric, each fabric's oblique line intersects with the adjacent fabric's oblique line because each fabric's oblique line intersects with the adjacent fabric's oblique line. Since they do not completely overlap each other, the shared porosity is 5% or less. Such a triple woven fabric has a common porosity of 5% or less, and can satisfy an air permeability (JIS L1096: Frazier method) of 3 to 50 cc / cm ² / sec even when the apparent porosity is 0%. This is because the gap between the interface between the upper fabric and the middle fabric, and the interface between the middle fabric and the lower fabric functions as a ventilation part, and three-dimensionally connects the voids of the upper fabric, the middle fabric, and the lower fabric. By action. Such a three-dimensional continuous ventilation portion effectively contributes to acoustic diffusion absorption. In addition, the double woven fabric and the triple woven fabric structure are an upper woven fabric having an M / N oblique (twill) weave structure and a lower woven fabric having an M / N oblique (twill) weave structure. A double woven fabric (M = 2 to 5, an integer of N = 1) or (M = 1, an integer of N to 2 to 5), and an M / N oblique (twill) weave structure A triple woven fabric (M = 2 to 5 integers, N = 1) or (M = 1,) consisting of an upper woven fabric and a lower woven fabric, and a middle woven fabric having an M / N oblique (twill) weave structure N is an integer of 2 to 5. Similarly, even if the sound-absorbing film material of the present invention is a quadruple woven fabric or a five-fold woven fabric, the corresponding sound absorbing effect is obtained.

Similarly, in the case of layered woven fabrics of plain fabric, imitation weave, five-sheet satin weave (2 jump 4/1 Auko, 3 jump 4/1 Auko, 2 jump 3/2 Auko, 3 jump 3/2 Auko) A fabric in which the tissue misalignment of the upper / lower or upper / middle / lower) is shifted by one complete structure vertically and horizontally so that the texture misalignment of the weaving structure does not overlap the same part. And Since the gap is shifted from the front, the common porosity is 5% or less, but even if the apparent porosity is 0%, the air permeability (JIS L1096: Frazier method) can be 3 to 50 cc / cm ² / sec. This is because the gap between one or two interfaces of the fabrics (upper / lower, or upper / middle / lower) functions as a ventilation portion and connects the voids of each fabric in a three-dimensional manner. Such a three-dimensional continuous ventilation portion effectively contributes to acoustic diffusion absorption. Further, it is a triaxial woven fabric in which two or three woven fabrics using warp yarns and bias yarns on the left oblique upper and right oblique upper portions are overlapped, each having a void ratio of 10% or less and a mass of 0.8 to 3.0 kg / m ² , shared porosity 5% or less (preferably 2.5% or less), and air permeability (JIS L1096: Frazier method) 3 to 50 cc / cm ² / sec, preferably 10 to 25 cc / cm ² 2 or 3 fabrics using warp yarns, weft yarns, and upper left and upper right bias yarns, such as triaxial flat fabrics satisfying / sec, triaxial basket fabrics or triaxial mimetic fabrics A four-ply woven fabric that overlaps and has a porosity of 10% or less for each portion of fabric, a mass of 0.8 to 3.0 kg / m ² , a shared porosity of 5% or less (preferably 2.5% or less), and ventilation Degree (JIS L1096: Frazier method) 3-50 cc / cm ² / sec, preferably It may be a four-axis flat woven fabric satisfying 10 to 25 cc / cm ² / sec, a four-axis basket woven fabric, a four-axis mimic woven fabric, or the like. In the woven fabric mentioned above, the woven intersections between the resin-coated yarns fixed to each other by thermal adhesion are excellent in the form stability of the sound-absorbing membrane material, and the fusion intersections are not heat-melted or fixed at all and the thermal adhesion is slight. Makes the sound absorbing film material more flexible. The fixing of the woven intersections by thermal adhesion may extend over the entire woven fabric, or may be performed at equal intervals vertically or horizontally, or at random partial woven intersections.

In the aspect of the sound-absorbing film material of the present invention, a bubble-containing resin layer having a density of 0.35 to 0.75 g / cm ³ is formed on one side of the fabric, and a part of the bubble-containing resin layer enters the fabric structure, The depth is preferably 1 to 35% with respect to the thickness of the fabric. The cell-containing resin layer is formed by coating with a foam-like composition and solidification treatment, whereby a part of the cell-containing resin layer penetrates into the woven fabric structure so that the air permeability (JIS L1096: Frazier method) is 3 to 50 cc. / Cm < ² > / sec, preferably 10 to 25 cc / cm < ² > / sec, further improving the echo attenuation effect. The sound energy is converted into heat energy and consumed by viscous friction caused by diffused reflection and vibration caused by the air vibration caused by the sound propagation to the bubble part included in the bubble-containing resin layer. For example, the foam composition is a two-pack type silicone elastomer paste (an organic solvent can be included in the viscosity modifier), a resin composition (paint) using a silicone resin emulsion, a paste sol mainly composed of a soft polyvinyl chloride resin ( For example, containing 1 to 5 parts by mass of silicone oil as a foam stabilizer), and mechanically stirring them with a stirrer (equipped with a blade made of a combination of several stainless steels and metals) to force bubbles. The wound whip is directly knife coated on one side of the fabric and solidified to simultaneously impregnate and coat the fabric. A part of the bubble-containing resin layer formed thereby is impregnated in the fabric. The maximum depth of the impregnated portion is 1 to 35% with respect to the thickness of the fabric, so that the inside of the fabric substantially contains bubbles. Further improve the sound absorption characteristics of echo attenuation effect by forming a formation. If the density of the bubble-containing resin layer exceeds 0.75 g / cm ³ , the sound absorption characteristics due to the echo attenuation effect may be insufficient. If the density is less than 0.35 g / cm ³ , the wear strength of the bubble-containing resin layer may be reduced. May be wrong.

In the present invention, the bubble-containing resin layer is a bubble produced as gas generation traces by impregnating a part of the impregnated portion with a chemical foaming agent-containing composition coating and thermally decomposing the chemical foaming agent by heating at 180 to 220 ° C. And a bubble-containing resin layer having an air permeability (JIS L1096: Frazier method) of 3 to 50 cc / cm ² / sec formed at a density of 0.35 to 0.75 g / cm ³ further improves the echo attenuation effect. As preferred. The chemical foaming agent-containing composition is composed of a soft vinyl chloride resin paste sol containing a plasticizer as a chemical foaming agent. The fabric is impregnated and coated simultaneously by knife coating one side of the fabric with a viscous paste sol composition containing 1 to 10 parts by mass of one or more selected from isobutyronitrile and the like. A part of the formed bubble-containing resin layer has an impregnation portion in the fabric, and the maximum depth of the impregnation portion is 1 to 35% with respect to the thickness of the fabric. The chemical foaming agent is pyrolyzed and gasified by heating at 180 to 220 ° C., and bubbles generated as gas generation traces are included in the bubble-containing resin layer and the impregnation part, and the density of the bubble-containing resin layer is 0.35 to 0.75 g. / Cm ³ . The bubble-containing resin layer is a soft vinyl chloride resin or a styrene copolymer resin, and a composition obtained by calendering a composition containing 1 to 10 parts by mass of the above chemical foaming agent is heat-melted on a fabric at 150 to 175 ° C. It is formed by laminating, pyrolyzing and gasifying the chemical foaming agent by heating at 180 to 220 ° C., and bubbles generated as gas generation traces are included in the bubble-containing resin layer and the impregnation part. It can also be set to 35 to 0.75 g / cm ³ .

  In particular, the bubble-containing resin layer preferably includes a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles as a main component, and a vinyl chloride resin (30-100 parts by mass of a plasticizer with respect to 100 parts by mass of the vinyl chloride resin). It is preferable that 1.5 to 10 parts by mass of the layered inorganic compound and 1.5 to 10 parts by mass of the molybdenum compound particles with respect to 100 parts by mass of the soft composition contained. As the layered inorganic compound, those described in paragraph [0019] can be used, and similarly, the molybdenum compound particles described in paragraph [0020] can be used. As a result, the sound absorption effect is improved, and at the same time, the layered inorganic compound expands in volume due to the heat of the flame during a fire, blocking the penetration of the flame and the leakage of toxic gas, and the residue of the combustion compound strengthened by the action of the molybdenum compound particles By forming a layer (chlorine-molybdenum composite oxide), it is possible to provide nonflammability in accordance with the Building Standards Act by increasing the blocking rate of penetration of flames and leakage of toxic gases.

  The construction of the sound absorbing film material of the present invention is performed by freely combining arbitrary standard sheets having a width of 1 m to 3 m and an arbitrary length of 1 m to 50 m, and mounting the fabric surface side of the sound absorbing film material as an acoustic incident surface. Especially 1). One sheet is about 1m to 3m in width and about 1m to 5m in length, and the sound absorbing film material is a square, rectangle, triangle, rhombus, etc. It can be used for flat ceilings and geometric 3D ceilings by fixing to the ceiling beam system or by hanging 2). In addition, a long sound-absorbing film material with a width of about 1m to 3m and a length of about 1m to 10m is fixed to the ceiling beam or aluminum pressing material on the two sides in the width direction, and the sound-absorbing film material is weighted without applying tension. It can be used for design art ceilings that are suspended in a loose semicircular arc state and express the arrangement of semicircular arcs with a number of sound-absorbing film materials 3). In addition, a single sound absorbing film material having a width of about 1 m to 3 m and a length of about 1 m to 5 m is in the form of a square, a rectangle, a triangle, a rhombus, etc. It can be used for design art ceilings that use drapes obtained by controlling tension by providing suspension nuts to the ceiling beam system using ropes and springs. 4). By applying the above construction, it can be used for purposes other than the ceiling, for example, for partitions, blinds, awning tents, etc., to ensure a corresponding sound absorbing effect.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these. First, a method for evaluating the sound absorbing film material of the present invention will be described.
<Sound absorption rate>
Using the fabric surface side of the membrane material as the sound incident surface, the noise reduction coefficient (NRC value) according to JIS A1405 (normal incidence method) was determined as the arithmetic average value of each sound absorption coefficient of 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz.
<Impregnation depth>
The buried part (impregnated part) at five points equally divided into six parts according to the width of the film material was obtained from an enlarged image of the cross section of the film material, and was obtained as a percentage with respect to the thickness of the film material.
<Shared porosity>
When the sound-absorbing film material is placed horizontally and observed from the vertical direction, the upper fabric gap and the lower fabric gap overlap each other, and the shared gap that penetrates two or three fabrics is formed. The total occupancy rate per unit area was calculated from a monitor image obtained by digital microscope observation, assuming that the light transmitting portion was a shared porosity, and calculated by a computer.
<Air permeability>
JIS L1096 8.27.1 Determined by the Frazier method defined in the A method.
<Nonflammable test> (ASTM-E1354: Corn calorimeter test method)
The surface of the film material was irradiated with 50 kW / m ² of radiant heat from a radiant electric heater for 20 minutes. In this exothermic test, the total heat generation amount and the heat generation rate for 20 minutes were measured, and the appearance of the film material after the test was observed.
(A) Total calorific value: 8 MJ / m ² or less was regarded as suitable.
(B) heating speed: 10 seconds or more continuously to the Relevant not exceed 200 kW / ^{m 2.}
(C) Appearance observation: Applicable to those with no pinhole depression exceeding 0.5 mm in diameter.

[Example 1]
<Resin-coated yarn (1)>
Dipping into a liquid bath of paste sol composition with soft vinyl chloride resin of the following formulation 1 using a flat yarn of alkali-free multifilament yarn (filament diameter 9 μm, 400 filaments: 75 count: 687 dtex) as a core yarn Then, after covering the entire circumference of the multi-filament yarn with the soft vinyl chloride resin paste sol composition, the resin coating layer is formed by gelation at 180 ° C., and the height: width ratio in the yarn cross section is A resin-coated yarn (1) having a flat elliptical cross section of 3: 5 and an apparent specific gravity of 2.06 was obtained.
[Formulation 1] Soft vinyl chloride resin paste sol composition Emulsion polymerization polyvinyl chloride resin (degree of polymerization 1700) 100 parts by mass 1,2-cyclohexanedicarboxylic acid diisononyl (plasticizer) 70 parts by mass * Product name: Hexamol DINCH (BASF (Made by company)
Epoxidized soybean oil (plasticizer) 5 parts by weight Barium / zinc composite compound (stabilizer) 2 parts by weight Antimony trioxide (flame retardant) 10 parts by weight Layered inorganic compound (montmorillonite: average particle size 8 μm) 10 parts by weight calcium molybdate Zinc (molybdenum compound particles) 5 parts by mass Silane coupling agent 2 parts by mass * γ-aminopropyltrimethoxysilane (100% active ingredient)
Benzotriazole (UV absorber) 0.3 part by mass Titanium oxide (white pigment) 2 parts by mass
<Multifilament yarn (1)>
Made of alkali-free multifilament (filament diameter 9μm: 400 filaments), we used a multifilament yarn (1) with a specific gravity of 2.55 using a 75th Taslan yarn (687dtex) with Z twist 25 times / m. .
<Weaving (1)>
Both warp and weft groups [2 resin-coated yarns (1), 2 multifilament yarns (1) 2] are single layer fabrics made of 2/2 Nanako (basket) fabrics with n as a repeating unit. The group has 28 weaves per inch (of which 14 are resin-coated yarns (1)), and the weft group is 30 per inch (of which 15 are resin-coated yarns (1)) A [woven fabric 1] having a porosity of 2%, an air permeability of 45 cc / cm ² / sec, and a mass of 680 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (1) was 0.49, and the occupied volume ratio of these yarns was 2: 1.

[Example 2]
<Weaving (2)>
Double woven fabric with a resin-coated yarn (1) driving density of 36 yarns / inch as the warp group and multifilament yarn (1) driving density of 30 yarns / inch as the weft group, and the upper layer fabric structure rising to the right 2/1 oblique weaving, lower fabric weaving 2/1 oblique weaving, upper layer fabric and lower layer fabric are connected by connecting them in a five-strand connection, and the common porosity is 0.8% [Weaving 2] having an air permeability of 16 cc / cm ² / sec and a mass of 1300 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (1) was 0.49, and the occupied volume ratio of these yarns was 2: 1.

Example 3
<Woven (3)>
Upper layer triaxial woven fabric in which the driving density of the resin-coated yarn (1) is 30 yarns / inch as the warp group, and the driving density of the multifilament yarn (1) is 20 yarns / inch as the upper left and upper right bias yarn groups. The lower layer 3 has a driving density of the resin-coated yarn (1) of 30 yarns / inch as the warp group, and the multifilament yarn (1) has a driving density of 20 yarns / inch as the upper left and upper right bias yarn groups. The lower-layer triaxial woven resin filament yarn (1) is connected to the multi-filament yarn (1) of the lower-layer triaxial woven fabric by connecting the five-layered resin-coated yarn (1) to the upper-layer triaxial woven fabric. (1) is a triaxial double woven fabric woven by connecting to the upper layer triaxial woven resin-coated yarn (1) with a connection straddling five wires, with a common porosity of 0.3% and an air permeability of 6 cc / cm ² / sec, Was obtained in an amount 1650 g / ^{m 2} of [fabric 3]. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (1) was 0.49, and the occupied volume ratio of these yarns was 1: 1.

Example 4
<Fabric (4)>
Using resin-coated yarn (1) and multifilament yarn (1), the density of the resin-coated yarn (1) as a warp group is 60 yarns / inch, and the number of multifilament yarns (1) as the warp group Woven fabric with 45 / inch, upper layer fabric texture rising to 3/1 diagonal fabric, middle layer fabric texture rising to left 3/1 diagonal fabric, lower layer fabric texture rising to 3 / No. 1 oblique weave, upper layer fabric and middle layer fabric are connected by a five-strand connection, middle layer fabric and lower layer fabric are connected by a five-strand connection, and weaving is performed. A [woven fabric 4] having a degree of ² cc / cm ² / sec and a mass of 1960 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (1) was 0.49, and the occupied volume ratio of these yarns was 2: 1.

Example 5
<Resin-coated yarn (2)>
The core yarn of the resin-coated yarn (1) is changed to a flat yarn of polyparaphenylene terephthalamide fiber (aramid fiber: filament diameter 12 μm, 843 dtex), and the liquid of the paste sol composition using the soft vinyl chloride resin of compound 1 After dipping in a bath and coating the soft vinyl chloride resin paste sol composition on the entire circumference of the multifilament yarn, gelation treatment is performed at 180 ° C. to form a resin coating layer, and the height in the cross section of the yarn: A resin-coated yarn (2) having a flat elliptical cross section with a width ratio of 2: 5 and an apparent specific gravity of 1.44 was obtained.
<Weaving (5)>
Both warp and weft yarn groups [2 resin-coated yarns (2), multifilament yarns (1) 2]] Single-layer fabric made of 2/2 Nanako (basket) fabric with n as a repeating unit. The group has a weaving density of 24 pieces per inch (of which 12 are resin-coated yarns (2)), and the weft group is 26 pieces per inch (of which the number of resin-coated yarns (2) is 13) A [woven fabric 5] having a porosity of 1.6%, an air permeability of 30 cc / cm ² / sec, and a mass of 625 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (2) and the multifilament yarn (1) was 1.11, and the occupied volume ratio of these yarns was 2: 1.

Example 6
<Fabric (6)>
A double woven fabric with a resin-coated yarn (2) driving density of 32 yarns / inch as the warp group and a multifilament yarn (1) with a driving density of 30 yarns / inch as the weft group, and the upper layer fabric structure rising to the right 2/1 oblique weaving, lower fabric weaving 2/1 oblique weaving, upper layer fabric and lower layer fabric are woven by connecting them with a five-strand connection, and the common porosity is 0.7% [Weaving 6] having an air permeability of 14 cc / cm ² / sec and a mass of 1190 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (2) and the multifilament yarn (1) was 1.11, and the occupied volume ratio of these yarns was 2: 1.

Example 7
<Weaving (7)>
Upper layer triaxial woven fabric in which the driving density of resin-coated yarn (2) is 26 yarns / inch as the warp group, and the multifilament yarn (1) driving density is 18 yarns / inch as the upper left and upper right bias yarn groups. The lower layer 3 has a driving density of the resin-coated yarn (2) of 26 yarns / inch as the warp group, and the driving density of the multifilament yarn (1) of 18 yarns / inch as the upper left and upper right bias yarn groups. The lower-layer triaxial woven resin filament yarn (2) is connected to the upper-layer triaxial woven multifilament yarn (1) by connecting the five-layered resin-coated yarn (2) to the upper-layer triaxial woven fabric. (1) is a triaxial double woven fabric that is woven by connecting to the resin coating yarn (2) of the upper triaxial woven fabric with five straddling wires, and has a shared porosity of 0.4% and an air permeability of 4 cc / cm ² / sec, Was obtained in an amount 1425 g / ^{m 2} of [fabric 7]. The specific gravity difference between the resin-coated yarn (2) and the multifilament yarn (1) was 1.11, and the occupied volume ratio of these yarns was 1: 1.

Example 8
<Woven (8)>
Using resin-coated yarn (2) and multifilament yarn (1), the density of the resin-coated yarn (2) as a warp group is 52 yarns / inch, and the number of multifilament yarns (1) as a warp group A triple fabric with an upper layer of 40 / inch, a 3/1 diagonal weave with an upper layer fabric texture, a 3/1 oblique weave with a middle layer fabric texture, and a 3/1 diagonal fabric with a lower layer fabric texture No. 1 oblique weave, upper layer fabric and middle layer fabric are connected by a five-strand connection, middle layer fabric and lower layer fabric are connected by a five-strand connection, weaving, shared porosity 0.2%, ventilation A [woven fabric 8] having a degree of ² cc / cm ² / sec and a mass of 1660 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (2) and the multifilament yarn (1) was 1.11, and the occupied volume ratio of these yarns was 2: 1.

Example 9
<Multifilament yarn (2)>
A multifilament yarn (2) having a specific gravity of 1.31 of polyparaphenylene terephthalamide fiber (aramid fiber: filament diameter 12 μm, 843 dtex) was used.
<Weaving (9)>
Both warp and weft yarn groups [2 resin-coated yarns (1), 2 multifilament yarns (2) 2] are single-layer fabrics made of 2/2 Nanako (basket) fabrics with n as a repeating unit. The group has 28 weaves per inch (of which 14 are resin-coated yarns (1)), and the weft group is 26 per inch (of which 13 are resin-coated yarns (1)) A [woven fabric 9] having a porosity of 1.8%, an air permeability of 40 cc / cm ² / second, and a mass of 645 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (2) was 0.75, and the occupied volume ratio of these yarns was 2: 1.

Example 10
<Woven (10)>
A double woven fabric in which the density of the resin-coated yarn (1) is 36 yarns / inch as the warp group and a multifilament yarn (2) is 24 yarns / inch in the weft yarn group, and the upper layer fabric structure rises to the right. 2/1 oblique weaving, lower fabric weaving 2/1 oblique weaving, upper layer fabric and lower layer fabric are woven by connecting them with 5 straddles, and the common porosity is 0.6% [Weaving 10] having an air permeability of 12 cc / cm ² / sec and a mass of 1230 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (2) was 0.75, and the occupied volume ratio of these yarns was 2: 1.

Example 11
<Weaving (11)>
Upper layer triaxial woven fabric in which the density of the resin-coated yarn (1) is 30 yarns / inch as the warp group, and the density of the multifilament yarn (2) is 16 yarns / inch as the upper left and upper right bias yarn groups The lower three layers of the resin-coated yarn (1) have a driving density of 30 yarns / inch as the warp group, and the multifilament yarn (2) has a driving density of 16 yarns / inch as the upper left and upper right bias yarn groups. The lower-layer triaxial woven resin filament yarn (1) is connected to the upper-layer triaxial woven fabric multifilament yarn (2) by connecting the five-layered resin-coated yarn (1) to the upper-layer triaxial woven fabric. (2) is a triaxial double woven fabric woven by connecting to the upper layer triaxial woven resin coated yarn (1) with a connection straddling five wires, with a shared porosity of 0.3% and an air permeability of 6 cc / cm ² / sec, It was obtained in an amount 1525g / ^{m 2} of [fabric 11]. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (2) was 0.75, and the occupied volume ratio of these yarns was 1: 1.

Example 12
<Woven (12)>
Using resin-coated yarn (1) and multifilament yarn (2), the density of the resin-coated yarn (1) as the warp group is 60 yarns / inch, and the number of multifilament yarns (2) as the warp group A triple fabric with an upper layer of 40 / inch, a 3/1 diagonal weave with an upper layer fabric texture, a 3/1 oblique weave with a middle layer fabric texture, and a 3/1 diagonal fabric with a lower layer fabric texture No. 1 oblique weave, upper layer fabric and middle layer fabric are connected by a five-strand connection, middle layer fabric and lower layer fabric are connected by a five-strand connection, and weaving is performed. A [woven fabric 12] having a degree of ² cc / cm ² / sec and a mass of 1860 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (2) was 0.75, and the occupied volume ratio of these yarns was 2: 1.

[Examples 13 to 24]
<Formation of bubble-containing resin layer>
Whip (2 times) that the soft vinyl chloride resin paste sol composition of the following formulation 2 was mechanically stirred by a stirrer (attached to a combination of 8 stainless steel wires and made into a bowl shape) to forcibly entrain air bubbles. (Foaming) is clearance-coated on one side of the 12 types of fabrics 1 to 12 obtained in Examples 1 to 12, uniformly forming a wet paint film with paste, and heated in an electric furnace at 180 ° C. for 3 minutes. Gelling treatment and adhesion treatment with the woven fabric are performed, and a bubble-containing resin layer (density 0.5 g / cm ³ ) is provided on one side of the woven fabrics 1 to 12 and 225 g / m ^{2 is} provided in the fabric structure. A membrane material of Examples 13 to 24, in which a part thereof penetrated and the depth thereof was 15 to 30% with respect to the thickness of the woven fabric, was obtained.
[Formulation 2] Paste sol composition with soft vinyl chloride resin Emulsion polymerization vinyl chloride resin (degree of polymerization 1700) 100 parts by mass 1,2-cyclohexanedicarboxylic acid diisononyl (plasticizer) 65 parts by mass * Product name: Hexamol DINCH ( (Made by BASF)
Epoxidized soybean oil (plasticizer) 5 parts by weight Barium / zinc composite compound (stabilizer) 2 parts by weight Antimony trioxide (flame retardant) 10 parts by weight Layered inorganic compound (montmorillonite: average particle size 8 μm) 10 parts by weight calcium molybdate Zinc (molybdenum compound particles) 5 parts by mass Silane coupling agent 2 parts by mass * γ-aminopropyltrimethoxysilane (100% active ingredient)
Benzotriazole (ultraviolet absorber) 0.3 part by mass Titanium oxide (white pigment) 2 parts by mass Dimethyl silicone oil (foam stabilizer) 2 parts by mass

All the woven fabrics 1 to 12 of Examples 1 to 12 have a membrane material strength that can be used for a ceiling membrane material, and are light in weight that are unlikely to cause serious human damage even in the event of a disaster. In particular, the resin-coated yarn effectively absorbs sound in a lower frequency region (specifically less than about 1000 Hz) than the multifilament yarn, and at the same time the multifilament yarn Is a synergistic effect of effectively absorbing sound in a higher frequency range than that of the resin-coated yarn, and it has made it possible to develop a sound absorption effect (JIS A1405: NRC value improvement by normal incidence method) over a wider range of noise. This is because the calculation of the NRC value according to JIS A1405 (normal incidence method) is the arithmetic average value of each sound absorption coefficient of 250 Hz, 500 Hz, 1000 Hz, and 2000 Hz. It proved that the sound absorption effect of 1000 Hz or more by the filament yarn portion was individually expressed simultaneously, and the NRC value was also improved in comparison with the comparative example. Further, in the case of a woven fabric having an opening of 1 to 5%, the effect of the present invention is that ASTM-E1354: the yarn of the woven fabric undergoes volume expansion by the heat of the corn calorimeter test, thereby reducing the porosity of the woven fabric to 0 to 0. Since it is closed to 1%, it becomes possible to obtain a non-combustible sound-absorbing film material according to the Building Standard Law. Further, in the fabrics 13 to 24 of Examples 13 to 24 in which the bubble-containing resin layer (density 0.5 g / cm ³ ) was formed on one side of the fabrics 1 to 12, the sound absorption effect (NRC value) was higher than that of the fabrics 1 to 12, respectively. ) Further improved by 0.9 to 1.3.

[Comparative Example 1]
By changing the woven structure of the fabric 1 of Example 1, both warp and weft yarn groups are 2/2 Nanako (basket) fabrics using resin-coated yarn (1) and multifilament yarn (1). The warp group has 28 weaves per inch (of which the number of resin-coated yarns (1) is 7), and the weft group has 30 weaves per inch (of which the number of resin-coated yarns (1) is 7) (Woven fabric 25) having a porosity of 2%, a permeability of 45 cc / cm ² / sec, and a mass of 415 g / m ² . The specific gravity difference between the resin-coated yarn (1) and the multifilament yarn (1) was 0.49, but the occupied volume ratio between the resin-coated yarn (1) and the multifilament yarn (1) was 1 : 2 has the effect of lowering the sound absorption effect and at the same time lowering the tear strength of the film material (JIS L1096: C method trapezoid type) as described below.
Tear strength of [Fabric 1]: 13kgf
Tear strength of [woven fabric 25] having the same woven structure as [woven fabric 1]: 4.5 kgf

[Comparative Example 2]
The weaving and knitting elements of the woven fabric 2 of Example 2 were changed, and the driving density of the resin-coated yarn (1) as a warp group was 36 / inch, and the weft group had a driving density of 30 by the same resin-coated yarn (1). / Inches of double woven fabric, the upper layer fabric texture is 2/1 diagonal weaving, the lower layer fabric organization is 2/1 obliquely weaving, and the upper layer fabric and the lower layer fabric are straddling 5 Weaving was performed by connecting with a wire to obtain [woven fabric 26] having a common porosity of 0.6%, an air permeability of 8 cc / cm ² / sec, and a mass of 1435 g / m ² . Since the woven / knitting elements were the same type and the specific gravity difference between the yarns was 0, the sound absorbing effect was inferior to that of the fabric 2 of Example 2.

[Comparative Example 3]
The weaving and knitting elements of the woven fabric 2 of Example 2 were changed, the multifilament yarn (1) has a driving density of 42 / inch as the warp group, and the weft group has a driving density of 36 with the same multifilament yarn (1). / Inches of double woven fabric, the upper layer fabric texture is 2/1 diagonal weaving, the lower layer fabric organization is 2/1 obliquely weaving, and the upper layer fabric and the lower layer fabric are straddling 5 Weaving was performed by connecting with a wire to obtain [Fabric 27] having a shared porosity of 2.6%, an air permeability of 35 cc / cm ² / sec, and a mass of 985 g / m ² . Since the woven / knitting elements were the same type and the specific gravity difference between the yarns was 0, the sound absorbing effect was inferior to that of the fabric 2 of Example 2.

[Reference Example 1]
<Resin-coated yarn (3)>
A non-alkali glass multifilament yarn (filament diameter 9 μm, 400 filaments: 75 counts: 687 dtex) is used as a core yarn and dipped into a paste sol composition liquid bath of soft vinyl chloride resin of compound 1 for soft chlorination After the vinyl resin paste sol composition is coated on the entire circumference of the multifilament yarn, it is gelled at 180 ° C. to form a resin coating layer, and the height: width ratio in the yarn cross section approximates 1: 1. Thus, a resin-coated yarn (3) having an apparent specific gravity of 2.06 was obtained.
<Woven (28)>
Resin-coated yarn (3) and two multifilament yarns (1) are included in the basic unit of the woven or knitted element as a warp yarn group and a weft yarn group. Both the warp yarn group and the weft yarn group [resin-coated yarn] (3) 2 strands, 2 multifilament yarns (1) 2] Single layer fabric made of 2/2 Nanako (basket) fabric with repeating unit of n, 30 warps per inch (including resin-coated yarn) The weaving density is 15% for the strip (3), and the weft density is 32 per inch (of which the number of the resin-coated yarn (1) is 16), the porosity is 2%, and the air permeability [Fabric 28] having 45 cc / cm ² / sec and a mass of 720 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (3) and the multifilament yarn (1) was 0.49, and the porosity and air permeability were the same as those of the fabric 1. However, due to the difference in the cross-sectional shape of the resin-coated yarn The sound absorption effect tended to be slightly lower than that of the fabric 1 of Example 1.

[Reference Example 2]
<Resin-coated yarn (4)>
A non-alkali glass multifilament yarn (filament diameter 9 μm, 400 filaments: 75 counts: 687 dtex) is used as the core yarn, and soft chlorination is carried out by dipping into a liquid bath of paste sol composition with soft vinyl chloride resin of compound 3. After the vinyl resin paste sol composition is coated on the entire circumference of the multifilament yarn, it is gelled at 180 ° C. to form a resin coating layer, and the height: width ratio in the yarn cross section is 3: 5. A resin-coated yarn (4) having a flat elliptical cross section and an apparent specific gravity of 2.06 was obtained.
[Formulation 3] Soft vinyl chloride resin paste sol composition Emulsion polymerization polyvinyl chloride resin (degree of polymerization 1700) 100 parts by mass 1,2-cyclohexanedicarboxylic acid diisononyl (plasticizer) 70 parts by mass * Product name: Hexamol DINCH (BASF (Made by company)
Epoxidized soybean oil (plasticizer) 5 parts by weight Barium / zinc composite compound (stabilizer) 2 parts by weight Antimony trioxide (flame retardant) 10 parts by weight Silane coupling agent 2 parts by weight * γ-aminopropyltrimethoxysilane (effective) 100% ingredient)
Benzotriazole (ultraviolet absorber) 0.3 parts by mass Titanium oxide (white pigment) 2 parts by mass * From [Composition 1], 10 parts by mass of layered inorganic compound (montmorillonite: average particle diameter 8 μm) and calcium zinc molybdate (molybdenum compound particles) ) Omit 5 parts by mass
<Weaving (29)>
Resin-coated yarn (4) and two multifilament yarns (1) are included in the basic unit of the woven or knitted element as a warp yarn group and a weft yarn group. (4) 2 strands, (2) multifilament yarns (1) 2] Single-layer fabric made of 2/2 Nanako (basket) fabric with n as the repeat unit, and 28 warps per inch (including resin-coated yarn) The number of strips (4) is 14), and the weft group is 30 weaves per inch (of which the number of resin-coated yarns (4) is 15). The porosity is 2% and the air permeability [Fabric 29] having 45 cc / cm ² / sec and a mass of 665 g / m ² was obtained. The specific gravity difference between the resin-coated yarn (4) and the multifilament yarn (1) was 0.47, and the porosity and air permeability were the same as those of the woven fabric 1, but ASTM-E1354: heat of corn calorimeter test However, the resin-coated yarn could not be expanded in volume, and the voids of the entire fabric remained as it was, and it was an inappropriate film material for the Building Standard Act property that could not block the penetration of flame and leakage of toxic gas.

  According to the present invention, a ceiling area constituting membrane material (membrane ceiling) and a sound absorbing membrane material installed on the ceiling of a building, or a ceiling area constituting member attached material is provided with a non-combustible membrane material according to the Building Standard Act, In the unlikely event of a disaster, by using a woven fabric woven with yarns having lightness and flexibility that are unlikely to cause serious human damage even if the ceiling collapses, and having different specific gravity, The yarns with different specific gravity are exposed, hidden or three-dimensionally crossed by the texture unit, so that the texture units with different sound absorption are randomly or regularly scattered on the entire surface of the sound absorbing film material of the present invention. The unit constitutes a sound absorbing effect, especially the sound absorbing effect in the low frequency region below about 1000 Hz due to the resin-coated yarn portion, and the medium to high frequency region above about 1000 Hz due to the multifilament yarn portion. By simultaneously expressing the sound absorption effect at the same time, it is excellent in sound absorption effect without being unevenly distributed with respect to the overall noise, and also can be produced by lighting and video projection, so indoor stadium, gymnasium, indoor pool, event hall, public hall It can also be applied to partitioning, blinds, awning tents, etc., as well as for membrane ceiling construction and optical ceiling membrane construction for ceremonial occasions, station buildings, airports, shopping malls, etc.

1: Sound absorbing film material 2: Fabric 2-1: Single layer fabric 2-2: Double fabric 2-3: Triple fabric 2-4: Cavity portion 3: Yarn 3-1: Resin coated yarn 3-1 1: Multifilament yarn (core yarn)
3-1-2: Resin coating layer (coating)
3-2: Multifilament yarn 4: Bubble-containing resin layer 4-1: Bubble

Claims (7)

  A woven fabric having a void ratio of 5% or less including a resin-coated yarn and a multifilament yarn in a woven or knitted element, and a specific gravity difference between the resin-coated yarn and the multifilament yarn is 0.25 or more, and both yarns The sound absorbing film material is characterized in that the occupied volume ratio is 4: 1 to 1: 1.   The weaving and knitting elements are 1) a warp group and a weft group, or 2) a warp group and an upper left / upward bias yarn group, and the fabric is a single layer fabric, a double fabric, and a triple fabric. The sound-absorbing film material according to claim 1, wherein the sound-absorbing film material is any one selected from woven fabrics.   The sound-absorbing film material according to claim 1 or 2, wherein the resin-coated yarn has a flat elliptical cross section, and a ratio of height: width in the flat elliptical cross section is from 3: 4 to 1: 4.   The said resin coating thread | yarn is comprised with a multifilament thread | yarn and a resin coating layer, the said resin coating layer has thermal expansibility, and obstruct | occludes the said porosity after thermal expansion to 1% or less. 4. The sound absorbing film material according to any one of 3 above.   The sound-absorbing film material according to claim 4, wherein the resin coating layer mainly contains a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles. A bubble-containing resin layer having a density of 0.35 to 0.75 g / cm ³ is formed on one side of the fabric, and a part of the bubble-containing resin layer penetrates into the fabric structure, and the depth is the thickness of the fabric. The sound-absorbing film material according to any one of claims 1 to 5, wherein the content of the sound-absorbing film material is 1 to 35%.   The sound-absorbing film material according to claim 6, wherein the bubble-containing resin layer mainly includes a vinyl chloride resin, a layered inorganic compound, and molybdenum compound particles.