Light-gathering and soundproofing sheet

Abstract

To provide a soundproof sheet that can balance visibility such as a figure, a lighting property and a landscape harmonic property.SOLUTION: A flexible sheet with a surface density of 1.0 to 2.5 kg / m2 and a whole light transmittance of 35 to 65% is formed by providing a chlorine atom-containing resin coating layer at each surface of a coarse substrate. The coarse substrate is a fabric with a porosity of 20 to 45%, and the fabric is either A) a fabric A or B) a fabric B. The fabric A contains half or more of yarn in any of Munsell lightness levels 1, 2, 3, and 4, in warp yarn or weft yarn, with the other-direction yarn having a Munsell lightness level of 8 or 9. The fabric B mixedly uses yarn of any of Munsell lightness levels 1, 2, 3, and 4 in warp yarn or weft yarn, and yarn with a Munsell lightness level of 8 or 9, featuring a regularly alternate arrangement with the mixed use ratio of 1:1 to 1:2.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a lighting and soundproofing sheet with excellent visibility. More specifically, the present invention relates to a lighting and soundproofing sheet that is used as a safety sheet to enclose the entire construction site for the construction or demolition of buildings, condominiums, houses, and other structures, a screen sheet to enclose noise-generating equipment inside and outside a factory, a sheet shutter at the entrance and exit of a factory, a partition sheet within a factory, etc., and particularly relates to a lighting and soundproofing sheet that has excellent visibility of people's shadows on the other side of the sheet and is also excellent in harmony with the scenery. [Background technology]

[0002] During the construction, large-scale repair, and even demolition of buildings and apartments, it is common to set up large-scale scaffolding and enclose the entire building with architectural protection mesh sheets, architectural protection sheets, etc., for the purpose of work safety (Industrial Safety and Health Regulations: Scaffolding, etc.), for the purpose of preventing falling objects and other safety for people around and passersby (Building Standards Act Enforcement Order, Industrial Safety and Health Regulations), and to prevent dust scattering and odor diffusion in the neighborhood. The architectural protection mesh sheets (e.g. Hiraoka Ori-sen Co., Ltd. "Tarpo Screen" trademark, Class 1 and Class 2) and architectural protection sheets (e.g. Hiraoka Ori-sen Co., Ltd. "Tarpo Canvas" trademark, Class 1 and Class 2) used for this enclosure are generally lightweight and strong flame-retardant certified products (Fire Service Act Enforcement Order) and JIS A8952 "Construction Work Sheet" compliant products made of polyester fiber fabric processed with soft polyvinyl chloride resin, and are easy to handle at construction sites because they are freely foldable. In particular, during demolition work on buildings, etc., the operating noise of heavy machinery and demolition noise is loud and continuous, so it is necessary to surround the entire building with soundproof sheets, soundproof panels, etc. This soundproof sheet is a type of architectural curing sheet with a surface density of 1 to 3 kg / m 2 It is a heavy tarpaulin with a mass several times that of general construction protection sheets (for example, Hiraoka Orisen Co., Ltd.'s "Sound Shutter" trademark). 2The greater the mass per unit area, the higher the sound transmission loss (soundproofing), so early soundproofing sheets were packed with a large amount of high-density powder such as iron powder and iron oxide to increase the surface density, but this made the sheets too heavy, which put too much strain on the eyelet connections of the multiple sheets installed on site, causing problems with the eyelet parts breaking. Also, while general-purpose construction curing sheets allow in light to a certain extent and give a sense of openness, a work site surrounded by heavy, light-blocking soundproofing sheets was a dimly lit, claustrophobic environment.

[0003] The applicant has previously developed a soundproof sheet with consideration given to daylighting, which is made of a mesh sheet substrate made of a coarse woven fabric covered with a high specific gravity resin layer containing a high specific gravity inorganic filler, and on the surface of which is formed a transparent resin layer made of a flexible polymer material (preferably containing a flame retardant), with a surface density of 0.8 to 3.5 kg / m 2proposed a light-transmitting soundproof sheet (Patent Document 1). This light-transmitting soundproof sheet invention secures a certain degree of sound transmission loss (soundproofing) in the mesh sheet area covered with a high-specific-gravity resin layer, and at the same time, secures a certain degree of daylighting with a transparent resin layer that covers and fills the voids in the mesh sheet. After light-transmitting soundproof sheets became standard (for example, Hiraoka Orisen Co., Ltd.'s "Trademark: Sound Shutter" light-transmitting sheet), there is a demand at construction sites these days for light-transmitting soundproof sheets with added visibility that allows the state of the work site and people's shadows to be confirmed from outside the enclosure, from the standpoint of crime prevention and safety management. As a design of architectural protection mesh sheet that satisfies the demand for improved visibility to grasp the actions and safety conditions of construction workers and others within the construction site enclosure from the outside, the applicant has disclosed that the thermoplastic resin layer on the front side of the mesh sheet has a substantially arc-shaped cross section with a hue of Munsell brightness 4 or less (Patent Document 2), and in paragraph

[0017] , hues of Munsell brightness 4 or less are exemplified as black, black-gray, black-brown, black-green, black-blue, black-purple, dark blue, dark green, maroon, blue, green, red, gray, etc. Furthermore, as a design of a membrane material for sheet shutters, partitions, and sheet structures that has excellent visibility to enable identification of the indoor environment, facial features, and object identification through the sheet when looking into a dim indoor environment from the bright outdoors through the sheet, the applicant has proposed a mesh sheet with Munsell brightness 4 or less as a base, with transparent resin layers on the front and back sides, and a mesh with through holes of 25 mm2 or less in area. 2 ~225mm 2 The transparent resin mirror surface portion should have a haze value of 10 or less, and the total occupancy rate of the transparent resin mirror surface portion should be 35 to 75% (Patent Document 3). The same colors as those in Patent Document 2 are given as examples of dark colors with a Munsell value of 4 or less.

[0004] It is true that the architectural protection mesh sheet of Patent Document 2 and the membrane material for sheet shutters of Patent Document 3 improve the visibility of the inside by visually effecting the hue of the mesh sheet to be Munsell value 4 or less, but the drawback is that the absolute requirement of using a sheet (membrane material) that is entirely dark (black) makes it too noticeable and difficult to harmonize with the surrounding environment. Therefore, recently, there has been a demand for a light-transmitting soundproof sheet that allows the visibility of people's shadows and the like, and that also harmonizes with the surrounding scenery to an appropriate degree. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2003-221888 A [Patent Document 2] JP 2015-004215 A [Patent Document 3] JP 2018-167498 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a soundproof sheet that has a good balance between visibility of people's shadows, lighting, and harmony with the landscape. [Means for solving the problem]

[0007] In order to solve the above problems, the inventors have discovered that a flexible sheet comprising a woven fabric A (a woven fabric using yarns of a specific Munsell lightness for the warp or weft and yarns of a different Munsell lightness for the other direction) satisfying specific requirements, or a woven fabric B (a woven fabric using yarns of a specific Munsell lightness and yarns of a different Munsell lightness mixed in a specific ratio for the warp and weft), and a chlorine atom-containing resin coating layer on both sides thereof, has a good balance between visibility of shadows, natural lighting and harmony with the landscape, and is also excellent in soundproofing, which has led to the completion of the present invention.

[0008] That is, the lighting and soundproofing sheet of the present invention has a surface density of 1.0 to 2.5 kg / m, and is formed by providing a chlorine atom-containing resin coating layer on both sides of a coarse-grained substrate. 2and a total light transmittance (JIS K7105) of 35 to 65%, and the coarse-grained base material is a woven fabric having a void ratio of 20 to 45% due to entanglement of warp threads (5 to 15 threads / inch) and weft threads (5 to 15 threads / inch), and this woven fabric is characterized in that A) the warp threads or weft threads have a Munsell value of V (JIS Z8721) Fabric A, which contains more than half of the yarns having a Munsell value V (same as above) of 1, 2, 3, or 4, and the yarns in the other direction have a Munsell value V (same as above) of 8 or 9, or B) Fabric B, which is composed of the warp yarns and weft yarns having a Munsell value V (same as above) of 1, 2, 3, or 4 and a Munsell value V (same as above) of 8 or 9, and the ratio of the number of the mixed yarns is regularly alternatingly arranged at a ratio of 1:1 to 1:2. This makes it possible to obtain a soundproof sheet with a good balance between visibility, lighting, and harmony with the landscape.

[0009] In the light-receiving, sound-proof sheet of the present invention, the yarn having a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4 is preferably a dope-dyed yarn, a yarn-dyed yarn, or a colored yarn, thereby improving visibility behind the light-receiving, sound-proof sheet.

[0010] In the light-transmitting, sound-proof sheet of the present invention, the colored yarn is preferably a yarn having a coating layer mainly composed of a vinyl chloride resin, a plasticizer, and a colorant, thereby improving visibility behind the light-transmitting, sound-proof sheet.

[0011] In the light-transmitting, sound-proof sheet of the present invention, the chlorine-atom-containing resin coating layer is preferably composed mainly of a chlorine-atom-containing resin having a chlorine atom content of 56.7 to 73.1% by mass, chlorinated paraffin having a chlorine atom content of 29 to 49% by mass, and a plasticizer. By increasing the weight of the chlorine-atom-containing resin coating layer, a higher sound transmission loss (soundproofing) can be obtained. Effect of the Invention

[0012] According to the present invention, it is possible to obtain a sheet that has a good balance between visibility of people's shadows, lighting, and harmony with the landscape, and also has excellent soundproofing properties.Therefore, the light-transmitting and soundproofing sheet of the present invention can be used as a safety sheet to be stretched over the entire construction site for the construction or demolition of structures such as buildings, condominiums, and houses, a privacy sheet to be stretched around noise-generating equipment inside and outside factories, a sheet shutter at the entrances and exits of factories, a partition sheet within a factory, etc. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 shows an example of the light-transmitting, soundproof sheet (fabric A) of the present invention. [Diagram 2] FIG. 1 shows an example of the light-transmitting, soundproof sheet (fabric A) of the present invention. [Diagram 3] FIG. 1 shows an example of the light-transmitting, soundproof sheet (woven fabric B) of the present invention. [Figure 4] FIG. 1 shows an example of the light-transmitting, soundproof sheet (woven fabric B) of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The lighting and soundproofing sheet of the present invention has a surface density of 1.0 to 2.5 kg / m, and is formed by providing a chlorine atom-containing resin coating layer on both sides of a coarse-grained substrate. 2and a flexible sheet with a total light transmittance (JIS K7105) of 35-65%. The chlorine atom-containing resin coating layer is mainly composed of a chlorine atom-containing resin with a chlorine atom content of 56.7-73.1% by mass, chlorinated paraffin with a chlorine atom content of 29-49% by mass, and a plasticizer. The coarse-grained base material is fabric A or fabric B with a void ratio of 20-45% due to entanglement with warp threads (5-15 threads / inch) and weft threads (5-15 threads / inch). Fabric A is composed of warp threads or weft threads containing more than half of threads with a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4, and threads in the other direction with a Munsell value V (JIS Z8721) rank of 8 or 9. Fabric B is composed of warp and weft yarns each having a Munsell value V (same as above) rank of 1, 2, 3, or 4 mixed with a Munsell value V (same as above) rank of 8 or 9, and the ratio of the number of yarns mixed is regularly alternated at 1:1 to 1:2. The yarns having a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4 are dope-dyed yarns, pre-dyed yarns, or colored yarns. The colored yarns are yarns having a coating layer mainly composed of vinyl chloride resin, plasticizer, and colorant.

[0015] The coarse-grained substrate used in the lighting / soundproofing sheet of the present invention is fabric A or fabric B. Fabric A has a void ratio of 20 to 45% and a mass of 75 to 250 g / m due to the entanglement of warp threads (5 to 15 threads / inch) and weft threads (5 to 15 threads / inch). 2Fabric B is a fabric in which more than half of the warp or weft yarns have a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4, and the yarns in the other direction have a Munsell value V (same as above) rank of 8 or 9. Fabric C is a fabric with a void ratio of 20 to 45% due to the intertwining of warp yarns (5 to 15 yarns / inch) and weft yarns (5 to 15 yarns / inch), and the warp and weft yarns are composed of a mixture of yarns with a Munsell value V (same as above) rank of 1, 2, 3, or 4, and yarns with a Munsell value V (same as above) rank of 8 or 9, with the ratio of the number of yarns mixed being regularly alternated at 1:1 to 1:2. These coarse-grained base materials are composed of solid parts occupied by threads and voids formed between the threads, with the number of voids being 16 to 225 per square inch, and the total occupancy rate of the solid parts relative to the unit area (1 square inch) of the coarse-grained base material being 55 to 80% (the total occupancy rate of the voids being 20 to 45%). The weaves of Fabric A and Fabric B are preferably plain weave, twill weave, basket weave, or leopard weave (gauze, ro, or lattice), with plain weave in particular providing an excellent balance of warp and weft properties for the resulting soundproofing sheet, and twill weave providing excellent shape stability for the coarse-grained base material (Fabric A or Fabric B) and less likely to cause misalignment, resulting in a stable appearance quality for the light-receiving, soundproofing sheet. The fiber types of the woven fabrics A and B are preferably synthetic fibers such as polypropylene, polyethylene, vinylon, polyester (polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polynaphthalene terephthalate, etc.), aromatic polyester, nylon, aromatic polyamide, and carbon fiber, and in particular polyethylene terephthalate (PET) is preferred, and those in which a phosphate ester component is copolymerized in the polymer main chain are preferred as they have high flame retardancy. The PET fibers may be derived from petrochemical resources (conventional petrochemical products), biomass (using bioethanol obtained by fermenting sugarcane waste molasses as the starting material for monomer synthesis), recycled (recycled PET bottles), or depolymerized. Depolymerized fibers are regenerated fibers obtained from regenerated polyester obtained by polymerization of regenerated monomers (terephthalic acid, dimethyl terephthalate, bis 2-hydroxyethyl terephthalate) obtained by depolymerizing polyester fibers.

[0016] The warp and weft yarns of the textile A and textile B can be in any form, such as multifilament, short fiber spun, monofilament, split yarn, tape yarn, etc., but multifilament yarns are preferred because they have the best strength. In particular, yarns that have been treated to prevent water absorption with a water repellent such as a silicon compound, a paraffin compound, or a fluorine compound are preferred, and the water absorption prevention treatment prevents rainwater from entering the cross section of the light-gathering soundproofing sheet due to capillary action and prevents mold from growing inside the sheet. In addition, the multifilament yarns are preferably flame-retardant treated with a cyclic phosphonic acid ester, which improves the flame retardancy of the light-gathering soundproofing sheet and makes it easier to comply with the fire retardant standards of the Fire Service Act. The multifilament yarn preferably has a large diameter of 500 (555 dtex) to 2000 (2222 dtex) denier, particularly 750 (834 dtex) to 1500 (1666 dtex) denier, and the thread density (threads / inch) of the warp and weft is preferably 5 to 15 threads / inch (2.54 cm) of these multifilament yarns to form a plain weave or a moss weave. As the moss weave yarn is woven with 3 threads per thread, one thread is actually made up of three threads, but the number of threads per thread is counted as one thread, with three threads counted as one thread. When the yarn density in plain weave is 5 threads / inch, the yarn is preferably 1500 (1665 dtex) to 2000 (2222 dtex) denier, and when it is 18 threads / inch, the yarn is preferably 500 (555 dtex) to 1000 (1111 dtex) denier. When the yarn density in mosaic weave is 5 threads / inch, one apparent yarn is preferably composed of three threads of 500 (555 dtex) to 1000 (1111 dtex) denier. The maximum apparent yarn density in mosaic weave using three threads of 500 (555 dtex) to 1000 (1111 dtex) denier is about 8 threads / inch. If it exceeds 10 threads / inch, the void ratio to ensure light collection and visibility may be insufficient. In order to ensure lighting and visibility, the porosity of the fabrics A and B must be 20-45%. If the porosity is less than 20%, it tends to be difficult to ensure lighting and visibility, and if the porosity is more than 45%, soundproofing properties tend to decrease.The void ratio (degree of opening) can be calculated by calculating the total area of ​​the yarns in a unit area of ​​Fabric A and Fabric B (for example, a square of 1 inch length by 1 inch width) as a percentage, subtracting this value from 100 (× 100%), measuring it on an enlarged copy, or calculating it from the thickness of the yarns.

[0017] Fabric A uses warp or weft yarns that at least include yarns with a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4 (the closer to 1, the darker the color) and have a hue of black or black-gray, or yarns with a Munsell value V rank of 1, 2, 3, or 4 and a Munsell chroma (JIS Z8721) rank of 6, 7, or 8 (the closer to 8, the brighter the color), and have a hue of black-brown, black-green, black-blue, gray-purple, gray-navy blue, gray-green, gray-orange, etc. Specifically, when a yarn with a Munsell value V of 1 (or 2, or 3, or 4) is used for the warp yarns (weft yarns), this yarn may constitute all of the warp yarns or may constitute a part of the warp yarns (weft yarns). Examples of the latter are a 1:1 alternating arrangement with a Munsell value V of 8 (or 9), a regular alternating arrangement with 2:1, a regular alternating arrangement with 3:2, etc. And the yarn in the other direction has a Munsell value V (same as above) of 8 or 9 (the closer it is to 9, the whiter it is) and a white hue (including white due to diffuse reflection). In the case of Fabric A, the ratio of the weft density of the warp yarns to the weft yarns is 5:4 to 4:5, and the contrast effect within this ratio allows for both the sheet's harmony with the landscape and the visibility of people's shadows behind the sheet. Fabric B uses yarns for the warp and weft that are regularly alternately arranged in a ratio of 1:1 to 1:2, with a Munsell value V (JIS Z8721) of 1, 2, 3, or 4 (the closer to 1, the darker the color) and have a hue ranging from black to dark gray, yarns with a Munsell value V of 1, 2, 3, or 4 and a Munsell chroma (JIS Z8721) of 6, 7, or 8 and have a hue ranging from black-brown, black-green, black-blue, gray-purple, gray-navy, gray-green, gray-orange, etc., and yarns with a Munsell value V (same as above) of 8 or 9 and a hue ranging from white (including white due to diffuse reflection). The contrast effect within this ratio allows for both the appearance harmony of the sheet and visibility behind the sheet. The regular alternating arrangement of dark (black) and white threads in a ratio of 1:1 to 1:2 that produces this effect is preferably a plain weave or a 1:1, 2:3, or 1:2 ratio for a mottled weave. In particular, in the case of a 1:2 ratio for a mottled weave, the three threads that make up one yarn strip may be one dark (black) thread and two white threads.In the case of the woven fabrics A and B, the term "white" refers to a yarn that appears white as a whole due to diffuse reflection of uncolored (semi)transparent multifilaments, colored only with a white pigment, or pastel colors in which a trace amount of pigment is added to a white pigment. Yarns with hues of black, black-gray, black-brown, black-green, black-blue, gray-purple, gray-navy, gray-green, gray-orange, etc. are dyed yarns (melt-spun from a colored resin), pre-dyed yarns (yarns melt-spun from an uncolored resin and dyed with a dye), or colored yarns (coated yarns impregnated and coated with a liquid colored resin composition), but in any case, black with only a black pigment or black dye is particularly preferred.

[0018] Examples of black pigments used in dyed yarns and colored yarns include carbon black, aniline black, and titanium black, with carbon black being the most preferred. The black pigment is used at a concentration of 1 to 10% by mass, preferably 1 to 5% by mass, based on the mass of the thermoplastic resin that is the base of the dyed yarn, or at a concentration of 1 to 10% by mass, preferably 1 to 5% by mass, based on the mass of the thermoplastic resin that is the base of the colored resin composition that colors the yarn. At this time, within the range of ranks 1, 2, 3, and 4 of Munsell value V (JIS Z8721), any pigment other than the black pigment may be used in combination, or a combination of pigments other than black may be used to design black gray, black brown, black green, black blue, gray purple, gray navy blue, gray green, gray orange, and the like. Examples of carbon black include furnace black, channel black, thermal black, acetylene black, and lamp black. Furnace black obtained by the incomplete combustion method is particularly preferred. Furnace black is easy to control the small particle size structure and has excellent spinnability for black spun yarn. Furnace black obtained by the oil furnace method is preferable for producing furnace black. On the other hand, hues such as black gray, black brown, black green, black blue, gray purple, gray navy blue, gray green, and gray orange can be toned by using a known organic pigment or inorganic pigment in combination with a black pigment. Organic pigments include azo pigments (insoluble monoazo, insoluble disazo, azo lake, condensed azo, and metal complex azo), phthalocyanine pigments (phthalocyanine blue, phthalocyanine green), dyeing lake pigments (acid dye lake, basic dye lake), condensed polycyclic pigments (anthraquinone pigments, thioindigo pigments, perinone pigments, perylene pigments, quinacridone pigments, dioxazine pigments, isoindolinone pigments, quinophthalone pigments, and isoindoline pigments), as well as nitroso pigments, alizarin lake pigments, and aniline pigments. Inorganic pigments include metal oxides, metal sulfides, metal sulfates, metal carbonates, metal hydroxides, metal chromates, spinel structure oxides, and rutile structure oxides.For yarn dyed yarn, black dyes such as Color Index International: CI Acid Black 2, 7, 24, 26, 31, 52, 63, 112 and 118, CI Direct Black 17, 19, 32, 51, 71, 108, 146, 154 and 168, CI Basic Black 2, CI Food Black 1 and 2 are used to dye the yarn melt-spun from uncolored resin. Also, black dyes can be used in combination with any dye, or in combination with dyes other than black, to create designs in black-gray, black-brown, black-green, black-blue, gray-purple, gray-navy, gray-green, gray-orange, etc.

[0019] Among these, the colored yarn is a yarn having a coating layer mainly composed of a vinyl chloride resin, a plasticizer, and a colorant (paragraph

[0018] ), and the coating layer is impregnated into all or part of the gaps between the filaments of the multifilament yarn and fixed thereto. Examples of vinyl chloride resins include vinyl chloride resin, chlorinated vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, acrylic craft vinyl chloride resin, and urethane graft vinyl chloride resin, and vinyl chloride resin with a degree of polymerization of 1000 to 2000 by emulsion polymerization is preferred for use in paste sol compositions. Examples of the plasticizer include adipic acid dialkyl ester compounds, sebacic acid dialkyl ester compounds, phthalic acid (1,2-, 1,3-, or 1,4-) dialkyl ester compounds (DHP, DEHP, DINP, DNP, etc.), cyclohexane (1,2-, 1,3-, or 1,4-) dicarboxylate compounds, 4-cyclohexene (1,2-, 1,3-, or 1,4-) dialkyl ester compounds, trimellitic acid ester compounds, phosphoric acid triester compounds, polyester compounds, chlorinated paraffin with a chlorine atom content of 29 to 49% by mass, and epoxidized soybean oil. A paste sol is prepared by mixing 40 to 100 parts by mass of the vinyl chloride resin with 100 parts by mass of the vinyl chloride resin. This coating layer is formed by coating or dipping the yarn with a paste sol mainly composed of vinyl chloride resin, plasticizer, and colorant, and is turned into a film by heat gelation. Additional components of the coating layer may include known additives such as stabilizers (metal soaps such as barium and zinc, tin mercapto, etc.), flame retardants (bromine compounds, metal hydroxides, metal oxides, phosphate compounds, etc.), UV absorbers (benzodenone compounds, triazine compounds, benzotriazole compounds, etc.), and fillers (barium sulfate, antimony trioxide). The mass ratio of the yarn to the coating layer is 1:2 to 1:5, and the coating layer contains high-density barium sulfate (specific gravity 4.4), antimony trioxide (specific gravity 5.7), zinc oxide (specific gravity 5.4), iron oxide (specific gravity 5.2), lead oxide (specific gravity 9.35), etc., and the sound transmission loss of the light-transmitting, sound-proofing sheet can be improved by using a high-density coating layer with a mass ratio close to 1:5. The unit mass (g / m) of the multifilament yarn 2The mass of the coating layer is 200 to 500% of the mass of the multifilament yarn, where the mass of the coating layer is taken as 100. At this time, a part of the coating layer penetrates into the voids of the multifilament yarn and fills them partially or entirely.

[0020] The chlorine atom-containing resin coating layer used in the light-transmitting, sound-proofing sheet of the present invention is mainly composed of a chlorine atom-containing resin having a chlorine atom content of 56.7 to 73.1% by mass, chlorinated paraffin having a chlorine atom content of 29 to 49% by mass, and a plasticizer (paragraph

[0019] ). The chlorine atom-containing resin having a chlorine atom content of 56.7 is vinyl chloride resin (suspension polymerization with a polymerization degree of 800 to 1500): -[CH2-CHCl] nA chlorine atom-containing resin with a chlorine atom content of 73.1% by mass is a chlorinated vinyl chloride resin with a chlorination degree of 100%: -[CHCl-CHCl]n-, or vinylidene chloride: -[CH2-CCl2]n-, and a chlorine atom-containing resin with a chlorine atom content of 68.1 to 72.2% by mass includes a combination of vinyl chloride resin and chlorinated vinyl chloride resin in a mass ratio of 10:1 to 1:3. The chlorinated vinyl chloride resin can be controlled to a chlorination degree of 1 to 100% (chlorine atom content of 73.1% by mass) by adjusting the conditions for blowing chlorine into the vinyl chloride resin. In particular, in order to obtain a higher sound transmission loss by making the specific gravity of the chlorine atom-containing resin coating layer large, it is preferable to use a large amount of chlorinated vinyl chloride resin (chlorine atom content of 64.9 mass% or more) -[CH2-CHCl]m-[CHCl-CHCl]n-, particularly a high specific gravity resin with a chlorination degree of 70 to 95% (chlorine atom content of 68.2 to 72.3 mass%). Here, in all the above chemical formulas, m and n are integers representing the degree of polymerization. The chlorine atom-containing resin coating layer contains a chlorine atom-containing resin, 1 to 30 parts by mass of chlorinated paraffin with a chlorine atom content of 29 to 49 mass% per 100 parts by mass of the chlorine atom-containing resin, and 20 to 60 parts by mass of a plasticizer (paragraph

[0019] ) as essential components, and may contain a composition containing the stabilizer and ultraviolet absorber described in paragraph

[0019] . Chlorinated paraffin acts as a flame retardant plasticizer, and because it has a higher specific gravity than general-purpose plasticizers, it makes the chlorine atom-containing resin coating layer heavier, resulting in a higher sound transmission loss. This composition is molded by calendar rolling or T-die extrusion to obtain a (film) sheet with a thickness of 0.15 to 0.75 mm and a total light transmittance (JIS K7105) of 80% or more, which is used as the chlorine atom-containing resin coating layer. This (film) sheet is laminated on at least one side, preferably both sides, of the coarse-grained substrate (woven fabric A, woven fabric B) to completely cover the coarse-grained substrate. The unit mass (g / m2) of the coarse-grained substrate is 2 ) is taken as 100, the mass of the chlorine atom-containing resin coating layer is 250 to 500% of the mass of the coarse-grained base material. At this time, a part of the chlorine atom-containing resin coating layer penetrates into the voids of the coarse-grained base material and fills them partially or entirely.

[0021] A (film) sheet having a thickness of 0.15 to 0.75 mm and a total light transmittance (JIS K7105) of 80% or more is laminated on one or more sides, preferably both sides, of the coarse-grained base material (woven fabric A, woven fabric B). Each through hole of the coarse-grained base material is filled with a part of the (film) sheet, and each has an area of ​​1.0 mm 2 ~10mm 2 The total light transmittance (JIS K7105) of the voids is 70-96%, and the total occupancy rate of the voids is 20% (placement density 15 fibers / inch) to 45% (placement density 5 fibers / inch). The surface density of the light-transmitting, soundproof sheet is 1.0-2.5 kg / m 2 , and preferably has a total light transmittance (JIS K7105) of 35 to 65%. In this light-receiving, sound-proof sheet, the solid portion occupied by the threads of the coarse-grained substrate is configured as "chlorine atom-containing resin coating layer / coarse-grained substrate" or "chlorine atom-containing resin coating layer / coarse-grained substrate / chlorine atom-containing resin coating layer", and the void portion formed between the threads is configured as "chlorine atom-containing resin coating layer" or "chlorine atom-containing resin coating layer / chlorine atom-containing resin coating layer". The sum of the total light transmittance of the solid portion and the total light transmittance of the void portion is the total light transmittance of the light-receiving, sound-proof sheet of the present invention. If the total light transmittance (JIS K7105) of the sheet is less than 35%, the light-receiving property is poor and the visibility of the shadow of a person on the other side of the sheet is also poor. Similarly, if the total occupancy rate of the void portion of the sound-proof sheet is less than 20%, the light-receiving property is poor and the visibility of the shadow of a person on the other side of the sheet tends to be poor. On the other hand, if the total light transmittance of the sheet exceeds 65%, the soundproofing property becomes poor, and similarly, if the total occupancy rate of the voids of the sheet exceeds 45%, the soundproofing property tends to become poor. 2 If it is less than 2.5kg / m, the soundproofing is poor. 2 If the weight exceeds this limit, the sheet will become excessively heavy and may be difficult to transport and handle when laid out.

[0022] The light-transmitting soundproof sheet of the present invention is preferably a rectangle with a width of 1.5 to 2.4 m and a length of 3 to 6 m per unit, and is particularly preferably a rectangle with a width of 1.5 to 2.1 m and a length of 3.4 to 5.1 m, which is excellent in handling. The light-transmitting soundproof sheet of the present invention can be used in combination with a conventional soundproof sheet (not having light-transmitting properties) to enclose a construction site as necessary, and the combination method can be an alternating vertical line enclosing, an alternating horizontal line enclosing, a checkered pattern, or the like. When enclosing the light-transmitting soundproof sheet alone or in combination with a conventional product, it is preferable to detachably connect the eyelet holes with a tool such as a string, a connecting clip, or a polyethylene cable tie, and further detachably fix the ends of adjacent soundproof sheets with a hook-and-loop fastener or the like to fill the gap between the sheets. The light-transmitting soundproof sheet of the present invention can be printed with a "soundproof" mark, just like a conventional soundproof sheet. Conventional soundproof sheets are printed with black ink that blocks light, but the light-transmitting soundproof sheet of the present invention uses colored semi-transparent ink or colored transparent ink that transmits light, so that the light-transmitting property is not impaired. The purpose of printing the "soundproof" mark is to prevent noise caused by the printed marking, to notify the site of the noise, and to avoid confusion with general construction curing sheets and misuse.

[0023] The light-receiving soundproof sheet of the present invention can be provided with an antifouling layer on its surface in order to prevent the image of the sheet from being negatively affected by the adhesion and dirt of dust that flies around at demolition sites, and to prevent the light-receiving property of the light-receiving soundproof sheet from being reduced. The method and material for forming this antifouling layer are not limited as long as they do not impair the light-receiving property and the harmony with the landscape of the sheet. For example, a coating film formed by applying and drying a resin solution such as an acrylic resin or a fluorine-based copolymer resin, a coating film containing silica fine particles or colloidal silica in these, a sol-gel coating film containing an organosilicate and / or a condensate thereof, a sol-gel coating film containing a photocatalytic inorganic material (e.g., photocatalytic titanium oxide), a multilayer film whose outermost surface is formed of a fluorine-based resin and laminated by an adhesive or a thermal melting process, etc. can be appropriately selected and used.

[0024] The light-receiving, soundproof sheet of the present invention will be described with reference to Figs. 1 to 4. Fig. 1 shows a light-receiving, soundproof sheet (1) made of threads (2) with a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4 as warp threads, and threads (3) with a Munsell value V (JIS Z8721) rank of 8 or 9 as weft threads. Fig. 2 shows a light-receiving, soundproof sheet (1) made of the threads (3) as warp threads, and the threads (2) as weft threads. Fig. 3 shows a light-receiving, soundproof sheet (1) made of the threads (2) and (3) as weft threads in a 1:1 ratio and alternately used, and the threads (2) and (3) as weft threads in a 1:1 ratio and alternately used. FIG. 4 shows a light-transmitting, sound-proof sheet (1) using the above-mentioned yarns (2) and (3) as the weft yarns in a ratio of 1:2 and in a repeating unit of "(2)(3)(3)" and using the above-mentioned yarns (2) and (3) as the weft yarns in a ratio of 1:2 and in a repeating unit of "(2)(3)(3)". Here, the above-mentioned yarns (2) are either dope-dyed yarns (2-1), pre-dyed yarns (2-2), or colored yarns (2-3). Note that in FIGS. 1 to 4, the chlorine-atom-containing resin coating layer (4) is omitted. EXAMPLES

[0025] The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto. The test methods used in the examples and comparative examples of the present invention are as follows. (1) Areal density (mass) Unit area (m 2 ) and convert it into areal density (kg / m 2 ) was decided. (2) Total light transmittance The total light transmittance was measured in accordance with JIS K7105. (3) Soundproofing (sound transmission loss) The soundproofing properties of the sheet were evaluated by the sound transmission loss at a center frequency of 1000 Hz according to JIS A 1416 "Laboratory sound transmission loss measurement method", and the effect was compared with that of a conventional soundproof sheet. Conventional soundproof sheet (Comparative example 1: surface density 1.32 kg / m 2 ) The sound transmission loss is 16dB at 1000Hz. (4) Flame retardancy (JIS A8952) (5) Visibility A test sheet was stretched out on the second-floor balcony of an apartment building (3 to 6 m above ground: indoor lighting turned off), and with the front side of the test sheet exposed to direct midday sunlight (October, Soka City, Saitama Prefecture), a random number of 1 to 5 adult males (wearing grey work clothes with Munsell value 6 and Munsell chroma 6) walked around on the balcony. Five observers stood 10 m away with their backs to the sun and visually confirmed the number of people, and the accuracy of this count was evaluated. 1: All five participants saw the correct number of people. 2: One person misidentified 3: Two or more people misidentified

[0026] [Example 1] Coarse substrate(1) The void ratio due to the warp threads (apparently 7 threads / inch) and the weft threads (apparently 7 threads / inch) is 25%, and the mass is 205g / m 2 The coarse-grained base material (1) used was a woven gauze fabric in which each warp thread was composed of one apparent black thread (Munsell value: 1) made of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 1), and each weft thread was composed of one apparent white (diffuse reflection) thread (Munsell value: 9) made of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 9). Light-transmitting and sound-proofing sheet (1) The chlorine atom-containing resin composition of the following [Formulation 1] was kneaded at 180°C and calender roll-molded into a thickness of 0.35 mm and a mass of 588 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 88% was produced, and this was heat-pressurized laminated onto both sides of the coarse-grained substrate (1) as a chlorine atom-containing resin coating layer (chlorine atom content: 56.7%) to produce a substrate with a thickness of 1.0 mm and a surface density of 1381 g / m. 2 Thus, a light-transmitting, sound-proof sheet (1) having a total light transmittance (JIS K7105) of 44% was obtained. [Formulation 1] <Chlorine atom-containing resin composition> Vinyl chloride resin (degree of polymerization 1300: chlorine atom content 56.7%) 100 parts by mass Diisononyl phthalate (plasticizer) 40 parts by weight Chlorinated paraffin (chlorine atom content 41.2% by mass: specific gravity 1.16) 20 parts by mass Barium-zinc composite PVC stabilizer 4 parts by weight Triazine-based UV absorber 0.3 parts by mass

[0027] [Example 2] Coarse substrate(2) The void ratio due to the warp threads (apparently 7 threads / inch) and the weft threads (apparently 7 threads / inch) is 25%, and the mass is 205g / m 2 The coarse-grained base material (2) used was a woven gauze fabric in which each warp thread was composed of one apparent white (diffuse reflection) thread (Munsell value: 9) consisting of three uncolored polyester (PET) multifilament threads (750 denier: 833 dtex) (Munsell value: 9), and each weft thread was composed of one apparent black thread (Munsell value: 1) consisting of three black (furnace black) dyed polyester (PET) multifilament threads (750 denier: 833 dtex) (Munsell value: 1). Light-transmitting and soundproofing sheet (2) The chlorine atom-containing resin composition of the following [Formulation 2] was kneaded at 180°C and calender roll-molded into a thickness of 0.35 mm and a mass of 640 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 83% was produced, and this was heat-pressurized laminated onto both sides of the coarse-grained substrate (2) as a chlorine atom-containing resin coating layer (chlorine atom content 64.1%) to produce a substrate with a thickness of 1.0 mm and a surface density of 1484 g / m. 2 Thus, a light-transmitting, sound-proof sheet (2) having a total light transmittance (JIS K7105) of 41% was obtained. [Formulation 2] <Chlorine atom-containing resin composition> Vinyl chloride resin (degree of polymerization 1300: chlorine atom content 56.7%) 50 parts by weight Chlorinated polyvinyl chloride resin (chlorination degree 90%: chlorine atom content 71.5%) 50 parts by mass Diisononyl phthalate (plasticizer) 40 parts by weight Chlorinated paraffin (chlorine atom content 41.2% by mass: specific gravity 1.16) 20 parts by mass Barium-zinc composite PVC stabilizer 4 parts by weight Triazine-based UV absorber 0.3 parts by mass

[0028] [Example 3] Coarse substrate(3) The void ratio due to the warp threads (apparently 7 threads / inch) and the weft threads (apparently 7 threads / inch) is 25%, and the mass is 205g / m 2 The coarse-grained base material (3) used was a woven fabric of the above-mentioned type, in which the warp and weft yarns were a mixture of one apparent black yarn (Munsell value: 1) consisting of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 1), and one apparent white (diffuse reflection) yarn (Munsell value: 9) consisting of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 9), with the former black yarn and the latter white yarn being arranged in an alternating ratio of 1:1. Light-transmitting and soundproofing sheet (3) Example 1 [Mixture 1]: Thickness 0.35 mm, mass 588 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 88% was used, and this was used as a chlorine atom-containing resin coating layer (chlorine atom content 56.7%), which was heat-pressurized laminated onto both sides of the coarse-grained substrate (3) to produce a thickness of 1.0 mm and a surface density of 1381 g / m 2 Thus, a light-transmitting, sound-proof sheet (3) having a total light transmittance (JIS K7105) of 44% was obtained.

[0029] [Example 4] Coarse substrate(4) The void ratio due to the warp threads (apparently 7 threads / inch) and the weft threads (apparently 7 threads / inch) is 25%, and the mass is 205g / m 2The coarse-grained base material (4) used was a woven fabric of the above-mentioned type, in which the warp and weft yarns were a mixture of one apparent black yarn (Munsell value: 1) consisting of three black (furnace black) dope-dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 1), and one apparent white (diffuse reflection) yarn (Munsell value: 9) consisting of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) strands (Munsell value: 9), with the ratio of the number of the former black yarns to the latter white yarns being 1:2, and the fabric was arranged in a repeating pattern of "black yarns / white yarns / white yarns." Light-transmitting and soundproofing sheet(4) Example 2 [Mixture 2] thickness 0.35 mm, mass 640 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 83% was used, and this was used as a chlorine atom-containing resin coating layer (chlorine atom content 64.1%), which was heat-pressurized laminated onto both sides of the coarse-grained substrate (4) to form a substrate with a thickness of 1.0 mm and a surface density of 1484 g / m. 2 Thus, a light-transmitting, sound-proof sheet (4) having a total light transmittance (JIS K7105) of 50% was obtained.

[0030] [Example 5] Coarse substrate(5) A coarse-grained substrate (5) was used in which the black yarn consisting of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell lightness: 1) in the coarse-grained substrate (1) in Example 1 was replaced with a black yarn consisting of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell lightness: 1) in the coarse-grained substrate (1). The coarse-grained substrate (5) has a void ratio of 21% and a mass of 325 g / m2 due to entanglement between the black warp yarns (apparent 7 yarns / inch) and the uncolored, non-resin-processed (diffuse reflection) white weft yarns (apparent 7 yarns / inch). 2 It is a woven fabric. Black dyed polyester (PET) multifilament yarn An uncolored polyester (PET) multifilament yarn (750 denier: 833 dtex) was coated with a black paste vinyl chloride resin sol of the following [Recipe 3], and heated at 180°C for 1 minute to gel the paste sol, thereby obtaining a polyester (PET) multifilament yarn (750 denier: 833 dtex) having a black (furnace black) colored coating layer. The mass ratio of the uncolored polyester (PET) multifilament yarn to the black colored coating layer was 1:2.8. [Recipe 3] <Black paste polyvinyl chloride resin sol> Vinyl chloride resin (polymerization degree 1700: emulsion polymerization) 100 parts by weight Diisononyl phthalate (plasticizer: DINP) 45 parts by weight Chlorinated paraffin (chlorine atom content 41.2% by mass: specific gravity 1.16) 20 parts by mass Barium-zinc compound stabilizer 4 parts by weight Antimony trioxide (flame retardant: specific gravity 5.7) 5 parts by weight Barium sulfate (specific gravity 4.4) 10 parts by weight Furnace black (carbon black pigment) 5 parts by weight Benzotriazole-based UV absorber 0.2 parts by mass Light-transmitting and soundproofing sheet(5) Example 1 [Mixture 1]: Thickness 0.35 mm, mass 588 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 88% was used, and this was used as a chlorine atom-containing resin coating layer (chlorine atom content 56.7%), which was heat-pressurized laminated on both sides of the coarse-grained substrate (5) to a thickness of 1.0 mm and a surface density of 1501 g / m 2 Thus, a light-transmitting, sound-proof sheet (5) having a total light transmittance (JIS K7105) of 42% was obtained.

[0031] [Example 6] Coarse substrate(6) A coarse-grained substrate (6) was used in which the black yarn consisting of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 1) in the coarse-grained substrate (3) in Example 3 was replaced with a black yarn consisting of three black (furnace black) dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 1) in the coarse-grained substrate (3) in Example 3. The coarse-grained substrate (6) had a void ratio of 23% due to entanglement with the warp yarns (7 apparent yarns / inch) and the weft yarns (7 apparent yarns / inch), and a mass of 325 g / m 2 The warp and weft threads are a mixture of black colored threads and uncolored, resin-free (diffuse reflection) white threads, with the black and white threads arranged in an alternating ratio of 1:1. Light-transmitting and soundproofing sheet(6) Example 2 [Mixture 2] thickness 0.35 mm, mass 640 g / m 2 A transparent sheet with a total light transmittance (JIS K7105) of 83% was used, and this was used as a chlorine atom-containing resin coating layer (chlorine atom content 64.1%), which was heat-pressurized laminated onto both sides of the coarse-grained substrate (6) to form a substrate with a thickness of 1.0 mm and a surface density of 1605 g / m 2 Thus, a light-transmitting, sound-proof sheet (6) having a total light transmittance (JIS K7105) of 40% was obtained.

[0032] [Table 1]

[0033] [Comparative Example 1] Coarse substrate(7) The entirety of one apparent black yarn (Munsell value: 1) consisting of three black dope-dyed (furnace black) polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 1) in the warp yarns of the coarse-grained substrate (1) in Example 1 was replaced with one apparent white yarn (Munsell value: 9) consisting of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 9). The void ratio was 25%, and the mass was 205 g / m.2 A woven gauze fabric of this type was used. Except for using this coarse-grained base material (7), the same procedure as in Example 1 was used, with a thickness of 1.0 mm and an areal density of 1381 g / m 2 Thus, a light transmitting / soundproof sheet (7) having a total light transmittance (JIS K7105) of 58% was obtained. This light transmitting / soundproof sheet (7) was excellent in light transmitting property and harmony with the scenery, but was poor in visibility.

[0034] [Comparative Example 2] Coarse substrate(8) The weft yarn of the coarse-grained substrate (1) in Example 1 was composed of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 9) that were all white in appearance (diffuse reflection) (Munsell value: 9) and was replaced with one apparent black yarn (Munsell value: 1) composed of three black dope-dyed (furnace black) polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 1). The void ratio was 25%, and the mass was 205 g / m. 2 A woven gauze fabric of this type was used. Except for using this coarse-grained base material (8), the same procedure as in Example 1 was used, with a thickness of 1.0 mm and an areal density of 1381 g / m 2 Thus, a light transmitting and soundproofing sheet (8) having a total light transmittance (JIS K7105) of 37% was obtained. This light transmitting and soundproofing sheet (8) had excellent visibility, but was poor in harmony with the scenery.

[0035] [Comparative Example 3] Coarse substrate(9) In the coarse-grained substrate (5) of Example 5, all of the black yarns (Munsell lightness: 1) consisting of three black (furnace black)-dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell lightness: 1) were replaced with gray yarns (furnace black / titanium oxide) consisting of three gray (furnace black / titanium oxide)-dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell lightness: 6) consisting of one apparent yarn (Munsell lightness: 6). The void ratio was 21%, and the mass was 325 g / m. 2 The same as in Example 5, except that a woven gauze fabric of 1.0 mm in thickness and 1501 g / m in surface density was used. 2Thus, a light transmitting and soundproofing sheet (9) having a total light transmittance (JIS K7105) of 43% was obtained. This light transmitting and soundproofing sheet (9) was excellent in harmony with the scenery, but was poor in visibility.

[0036] [Comparative Example 4] Coarse substrate(10) The ratio of the numbers of one apparent black yarn (Munsell value: 1) consisting of three black (furnace black) dope-dyed polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 1) in the coarse-grained substrate (4) of Example 4 and one apparent white (diffuse reflection) yarn (Munsell value: 9) consisting of three uncolored polyester (PET) multifilament yarns (750 denier: 833 dtex) (Munsell value: 9) was changed from 1:2 to 1:4, and the yarns were arranged in a repeating sequence of "black yarn / white yarn / white yarn / white yarn / white yarn", with a void ratio of 25% and a mass of 205 g / m 2 The same as in Example 4 except that a gauze fabric of 1.0 mm in thickness and 1484 g / m in surface density was used. 2 Thus, a light transmitting / soundproof sheet (10) having a total light transmittance (JIS K7105) of 50% was obtained. This light transmitting / soundproof sheet (10) was excellent in light transmitting property and harmony with the scenery, but was poor in visibility.

[0037] [Comparative Example 5] Base material (11) The warp yarns (apparently 7 yarns / inch) of the coarse-grained base material (1) in Example 1 were changed to an apparent density of 9 yarns / inch, and the weft yarns (apparently 7 yarns / inch) were changed to an apparent density of 9 yarns / inch. The void ratio was 4%, and the mass was 266 g / m 2 The same as in Example 1 except that a woven gauze fabric of 1.0 mm in thickness and 1442 g / m in surface density was used. 2 Thus, a soundproof sheet (11) having a total light transmittance (JIS K7105) of 1.5% was obtained. This soundproof sheet (11) was excellent in harmony with the scenery, but was poor in lighting and visibility.

[0038] [Comparative Example 6] In Example 1, the thickness is 0.35 mm and the mass is 588 g / m 2The chlorine-containing resin coating layer (chlorine atom content 56.7%) with a total light transmittance (JIS K7105) of 88% is 0.35 mm thick and weighs 358 g / m 2 The thickness was 1.0 mm, and the surface density was 921 g / m. 2 Thus, a daylighting sheet (12) with a total light transmittance (JIS K7105) of 36% was obtained. This daylighting sheet (12) was excellent in visibility and harmony with the landscape, but was poor in soundproofing and fireproofing.

[0039] [Table 2] [Industrial Applicability]

[0040] According to the present invention, it is possible to obtain a sheet that has a good balance between visibility of people's shadows, lighting, and harmony with the landscape, and also has excellent soundproofing properties.Therefore, the light-transmitting and soundproofing sheet of the present invention can be used as a safety sheet to be stretched over the entire construction site for the construction or demolition of structures such as buildings, condominiums, and houses, a privacy sheet to be stretched around noise-generating equipment inside and outside factories, a sheet shutter at the entrances and exits of factories, a partition sheet within a factory, etc. [Explanation of symbols]

[0041] 1: Light-transmitting and sound-proofing sheet 2: Munsell value V is 1, 2, 3, or 4. 3: Munsell value V is 8 or 9. 4: Coarse base material 5: Chlorine-containing resin coating layer (5 is omitted in the front views of Figures 1 to 4)

Claims

1. A chlorine-containing resin coating layer is provided on both sides of a coarse-grained substrate, and the surface density is 1.0 to 2.5 kg / m ２ and a total light transmittance (JIS K7105) of 35 to 65%, and the coarse-grained base material is a woven fabric having a void ratio of 20 to 45% due to entanglement of warp threads (5 to 15 threads / inch) and weft threads (5 to 15 threads / inch), and this woven fabric is characterized in that A) the warp threads or weft threads have a Munsell value V (JIS A light-receiving, sound-proofing sheet characterized in being either: 1) Fabric A, the majority of which is composed of yarns having a Munsell value V (same as above) of 1, 2, 3, or 4, and the yarns in the other direction having a Munsell value V (same as above) of 8 or 9; or B) Fabric B, the warp yarns and weft yarns of which are composed of a mixture of yarns having a Munsell value V (same as above) of 1, 2, 3, or 4, and yarns having a Munsell value V (same as above) of 8 or 9, the ratio of the numbers of the mixed yarns being regularly alternatingly arranged at a ratio of 1:1 to 1:

2.

2. 2. The light-receiving, sound-proof sheet according to claim 1, wherein the yarn having a Munsell value V (JIS Z8721) rank of 1, 2, 3, or 4 is a dope-dyed yarn, a yarn-dyed yarn, or a colored yarn.

3. 3. The light-receiving, sound-proof sheet according to claim 2, wherein the colored yarn is a yarn having a coating layer mainly composed of a vinyl chloride resin, a plasticizer, and a colorant.

4. The light-transmitting, soundproofing sheet according to any one of claims 1 to 3, wherein the chlorine-atom-containing resin coating layer is mainly composed of a chlorine-atom-containing resin having a chlorine atom content of 56.7 to 73.1% by mass, a chlorinated paraffin having a chlorine atom content of 29 to 49% by mass, and a plasticizer.

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