JP2012031962A - Sound insulating cover member and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulating cover member that is a covering member for piping of a drainage pipe or the like, and has a sound absorbing layer and a sound insulating layer both integrally formed, the member being formed as a single body, and which is formed as a single body and simply mounted to even pipes of complicated shapes such as a bend pipe, and pipes having a branch such as a Y-shaped pipe and a T-shaped pipe, facilitates site operation thereof, is free from peeling and dropout, and can be manufactured easily, and to provide a manufacturing method therefor.SOLUTION: The sound insulating cover member 1 includes an inner layer composed of a nonwoven fabric or continuous bubble foam 2, and an outer layer composed of a mortar-impregnated layer 3 in which elastic mortar composed of a hydraulic-setting inorganic compound and a polymer additive and having an elongation rate of 5% or more is impregnated in a nonwoven fabric or continuous bubble foam, is a cylindrical body having an inner diameter corresponding to the outer circumference of piping 4 and is provided with a split groove 5 in a longitudinal direction of the cylindrical body, is the single body, and is configured to be mountable by being fitted to the piping 4.

Description

  The present invention relates to a soundproof covering member used by covering a pipe in order to block noise generated from the inside of a pipe such as a drain pipe in a high-rise or low-rise house or building, and a method for manufacturing the same.

Conventionally, in apartment houses such as apartments, condominiums, office buildings, etc., in order to prevent the noise caused by drainage flowing through the piping for water supply and drainage from leaking outside, by installing sound insulation materials on the outer peripheral surface of the piping, etc. Measures are taken.
For example, Patent Document 1 describes a method in which a sound insulating sheet material is wound around the outer periphery of the synthetic resin pipe, fastened with a double-sided adhesive tape, and a non-woven tape is attached to cover the fastening portion.

However, this method has a troublesome work of fastening with a double-sided adhesive tape, and there is a risk of peeling of the tape. Furthermore, when the pipe is not a straight pipe but has a bent pipe, a Y-shaped pipe, a T-shaped pipe or the like, the winding of the sound insulation sheet at the site is inferior in workability and requires time for construction. It was a thing.
For this reason, in order to facilitate on-site construction, a three-dimensionally molded sound insulating material that conforms to the outer shape of the pipe is manufactured in advance in a factory, and is transported to the site for use.

For example, Patent Document 2 describes a sound insulation material for an elbow part that is formed by bonding a sound insulation sheet and a pipe cover that is molded into a shape that fits the elbow part, and that is connected to a part of what is divided in two. Has been.
Patent Document 3 discloses a sound-insulating member comprising a sound-absorbing layer made of glass wool or glass fiber sheet and a sound-insulating layer made of a polymer-based sheet material that covers the outside of the sound-absorbing member. Is formed in advance into a cylindrical shape having an inner diameter corresponding to the outer periphery, an opening is provided in a part thereof, and a fitting or a collecting pipe is fitted and attached from the opening. Yes.

  On the other hand, in Patent Document 4, a fire-resistant outer tube is divided into a plurality of divided members divided in the circumferential direction of the inner tube, which are connected with an adhesive such as mortar, and the inner tube and the outer tube It is described that a gap such as mortar is filled in a gap between the two.

JP 2010-101481 A JP 2005-221076 A JP 2009-264577 A JP 2002-286170 A

However, the sound insulating material described in Patent Document 2 is a sound insulating sheet and a pipe cover that are bonded together with an adhesive. In some cases, sufficient soundproofing may not be obtained.
Further, in the soundproofing member described in Patent Document 3, the sound insulating layer is covered as it is when covering the outside of the sound absorbing layer, or is also covered by providing an adhesive layer or an adhesive layer therebetween. In the same manner, there is a risk of gap formation or peeling between the sound insulation layer and the sound insulation layer, and it cannot be said that the sound insulation is sufficient.

  On the other hand, the fire-resistant outer tube described in Patent Document 4 is three-dimensionally molded in accordance with the shape of the inner tube, but the divided members must be connected during construction on site, Mortar etc. were necessary for installation, and it could not be said that construction was easy. Further, this outer tube does not have soundproofing properties.

  The present invention has been made in order to solve the above technical problem, and is a covering member for piping such as a drain pipe, wherein the sound absorbing layer and the sound insulating layer are integrally formed, and the member is formed as a single body. , Not only straight pipes but also curved pipes, pipes with complicated shapes such as pipes with branches such as Y-shaped pipes, T-shaped pipes, etc. are easy to install and easy to construct on site, An object of the present invention is to provide a soundproof covering member that can be easily manufactured without peeling or dropping, and a method for manufacturing the same.

The soundproof coating member according to the present invention is a soundproof coating member for covering a pipe, and has an elongation at break consisting of an inner layer made of a nonwoven fabric or open-cell foam, a hydraulic inorganic composition and a polymer admixture. A cylindrical body having an inner diameter corresponding to the outer periphery of the pipe, and having an inner diameter corresponding to the outer periphery of the pipe, which is divided in the longitudinal direction of the cylindrical body. A groove is provided and is a single unit, and is mounted by fitting into the pipe.
By configuring the soundproof coating member as described above, the sound absorbing layer and the sound insulating layer can be handled as a single member in a state in which the sound absorbing layer and the sound insulating layer are integrated, facilitating mounting, and preventing peeling and dropping off. Can be planned.

In the soundproof covering member, a mortar layer made of the elastic mortar may be formed outside the mortar impregnated layer.
As described above, the three-layer structure is used, and the outer surface of the soundproof coating member is formed of a layer made of only elastic mortar, so that the soundproofness can be further improved.

Moreover, it is preferable that the said hydraulic inorganic composition consists of cement or a cement and a non-hydraulic inorganic type powder.
Cement is preferably used in the present invention from the viewpoints of permeability to a nonwoven fabric or open-cell foam, density after curing, soundproofing, and the like.

Furthermore, the polymer admixture is preferably at least one selected from an aqueous polymer dispersion, an aqueous polymer solution, and a re-emulsifying powder resin.
From the viewpoint of handling and cost when mixing with the hydraulic inorganic composition, the above-mentioned types of polymer admixtures are preferably used.

The nonwoven fabric is preferably a compressed body of organic or inorganic fibers or a needle punched felt.
From the viewpoints of mortar permeability and soundproofing effect, those materials are preferably used.

Furthermore, the density of the elastic mortar is preferably 1.3 g / cm ³ or more from the balance of handling properties such as transportation and sound insulation.

The method for producing a soundproof covering member according to the present invention is a method for producing a soundproof covering member for covering a pipe, and the outer peripheral surface of a pipe member or a mold having the same shape as the pipe to be covered is formed of a nonwoven fabric or an open cell foam. By covering the outer surface with an elastic mortar composed of a hydraulic inorganic composition and a polymer admixture having an elongation at break of 5% or more, and drying and curing to form a mortar-impregnated layer. A cylindrical body in which the inner layer is a nonwoven fabric or open-cell foam, and the outer layer is a mortar-impregnated layer, and the longitudinal direction of the cylindrical body is divided so that the cylindrical body maintains the state of an integrally molded product. Forming a groove and removing it from the piping member or mold.
According to such a manufacturing method, the soundproof covering member according to the present invention as described above can be manufactured easily and at low cost.

The non-woven fabric or open-cell foam is preferably three-dimensionally formed by press working in accordance with the shape of the outer peripheral surface of the pipe to be coated.
The nonwoven fabric or open cell foam covering the outer peripheral surface of the piping member or mold is three-dimensionally formed in advance in this manner, whereby the soundproof covering member can be manufactured more easily and efficiently.

  In the manufacturing process of the said cylindrical body, you may form the mortar layer which consists of the said elastic mortar in the outer side of the said mortar impregnation layer.

The soundproof covering member according to the present invention can be handled as a single member in a state where the sound absorbing layer and the sound insulating layer are integrated when covering a pipe such as a drain pipe. Therefore, not only when the pipe is a straight pipe, but also when the pipe has a complicated shape such as a bent pipe, a pipe having a branch such as a Y-shaped pipe, a T-shaped pipe, etc. Can be made easy, and peeling and dropping can be prevented. Further, since the seam can be made as short as possible, the soundproofness is not lowered.
Moreover, according to the manufacturing method which concerns on this invention, the above soundproof coating | coated members can be manufactured easily.

It is the perspective view which showed a mode that the soundproof coating | coated member which concerns on this invention was mounted | worn. It is the perspective view which showed the state which mounted | wore with the soundproof coating | coated member shown in FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The soundproof covering member according to the present invention is used for covering a pipe and has a two-layer structure in which an inner layer is a sound absorbing layer and an outer layer is a sound insulating layer. The inner sound-absorbing layer is made of a nonwoven fabric or open-cell foam, and the outer sound-insulating layer is made of a non-woven elastic mortar composed of a hydraulic inorganic composition and a polymer admixture and having an elongation at break of 5% or more. Alternatively, it comprises a mortar impregnated layer impregnated in an open cell foam. Moreover, the shape is a cylindrical body having an inner diameter corresponding to the outer periphery of the pipe, a split groove is provided in the longitudinal direction of the cylindrical body, and is a single body, which is attached by fitting into the pipe. Is.
As described above, the soundproof covering member according to the present invention is a state where the sound absorbing layer and the sound insulating layer are integrated, and can be handled as a single member, and has a flexible and elastic covering member for piping. It is.

The soundproof covering member may have a three-layer structure. In this case, a mortar layer made of the elastic mortar is formed outside the mortar-impregnated layer.
As described above, by configuring the outer surface of the soundproof covering member with a layer made of only elastic mortar, the soundproofness can be further improved.

The elastic mortar used in the present invention is composed of a hydraulic inorganic composition and a polymer admixture, and the elongation at break is 5% or more.
Such elastic mortars are superior in sound insulation, workability and impact resistance, even at the same weight or lighter weight than conventional synthetic rubber and asphalt sound insulation materials, and are much cheaper. is there. Moreover, even if it does not perform long-term underwater curing, it is excellent in intensity | strength expression, especially tensile strength and bending strength are high, and elongation ability is also large. Furthermore, water-tightness and air-tightness are obtained by forming a polymer film with the polymer admixture, and resistance to water absorption and water permeability is excellent.

Although the minimum required elongation at break of the elastic mortar varies depending on the pipe diameter and shape of the pipe to be coated, the smaller the diameter, the smaller the curvature, and thus the greater the elongation at break is required. In general pipes such as drainage pipes (nominal diameter of 20 to 150 mmφ), the elongation at break is required to be 5% or more from the viewpoint of transportation stability, workability, vibration absorption after piping construction, etc. It is preferably 10% or more.
The elongation at break referred to in the present invention was determined by the tensile strength and elongation test at break described in the Architectural Institute of Japan “Polymer cement-based paint film waterproofing construction policy (draft) and explanation”. Value.

In addition, the elastic mortar is preferably light in terms of handling such as transportation, but since the sound insulation by the elastic mortar is more effective as the density is higher, the density after curing is 1.3 g / cm ³ or more is preferable. If the density is too small, handling becomes easy, but sufficient sound insulation cannot be obtained, so the outer layer or the elastic mortar layer must be thickened. More preferably, it is 1.4 g / cm ³ or more, and still more preferably 1.5 g / cm ³ or more.
The viscosity of the elastic mortar needs to be determined in consideration of the material of the nonwoven fabric or open cell foam impregnated with the elastic mortar, the surface weight (density), the thickness, the mortar impregnation speed and the curing time.

As a hydraulic inorganic composition which is a constituent material of the elastic mortar, a hydraulic material alone or a mixture of this and a non-hydraulic inorganic powder is used.
As the hydraulic material, cement is the most preferable material from the viewpoints of cost, density after curing of the elastic mortar, sound insulation, and the like. Examples of the cement include various Portland cements such as normal, early strength, medium heat, and ultra early strength, and blast furnace cement obtained by mixing fly ash, blast furnace slag, and the like.

Further, as the non-hydraulic inorganic powder, non-hydraulic river sand, mountain sand, gravel, crushed stone powder, and foamed materials such as vermiculite and pearlite can be used for weight reduction. In particular, river sand and mountain sand are preferable because they can increase the strength of the elastic mortar after curing and can reduce the cost.
However, since the non-hydraulic inorganic powder tends to reduce the elongation of the cured body, when blended, the blending amount is, for example, 100 parts by weight of cement in the case of river sand, mountain sand, etc. The amount is preferably about 100 to 800 parts by weight. In addition, since the foam material tends to lower the sound insulation, it is preferable to measure the sound insulation performance in advance and use it according to the desired sound insulation.

  The polymer admixture used with the hydraulic inorganic composition is blended in order to ensure the elongation at break of the elastic mortar. The main component of the polymer admixture is a synthetic resin or rubber.

  Examples of the synthetic resin used as a component of the polymer admixture include phenolic resins, urea resins, melamine resins, furan resins such as phenol / furfural resins and furfuryl alcohol resins, epoxy resins, Examples include thermosetting resins such as saturated polyesters, silicone resins such as silicone resins, urethane resins, xylene resins, toluene resins, alkyd resins, and vinyl resins, polyvinyl ethers, polyvinyl alcohols, acrylic resins. Resin, methacrylic resin, styrene resin, polystyrene, styrene / acrylonitrile copolymer (AS resin), ABS resin, AAS resin, ACS resin, AXS resin such as acrylonitrile / EPDM / styrene terpolymer, polypropylene, propylene copolymer Polymer, poly Bromide, polyacetals, polycarbonates, polyesters, thermoplastic resins such as polyphenylene oxide-based resins. Among these, those excellent in miscibility with cement and imparting elasticity are preferable, and synthetic resins having water solubility or water dispersibility are preferable.

Examples of the vinyl resin include polymers (homopolymers) including at least one of vinyl acetate, vinyl chloride, vinylidene chloride, vinyl lactate, vinyl butyrate, vinyl pivalate, vinyl versatite, and vinyl benzoate as monomer components. Polymer or copolymer). Specific examples of copolymers comprising these monomer components and other monomer components include EVA resin (ethylene / vinyl acetate copolymer), vinyl acetate / acrylic copolymer resin, ethylene / vinyl chloride. Examples thereof include a copolymer resin and a vinyl acetate / vinyl versatite copolymer resin.
The acrylic or methacrylic resin may be a polymer composed of at least one of (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylamide and (meth) acrylonitrile as a monomer component. (Homopolymer or copolymer).

  The rubber used as the component of the polymer admixture is natural rubber (NR), styrene / butadiene rubber (SBR), acrylonitrile / butadiene rubber (NBR), chloroprene rubber (CR), methyl methacrylate / butadiene. Synthetic rubbers such as rubber (MBR), butadiene rubber, and isoprene rubber can be exemplified.

  The molecular weight, polymerization degree, viscosity and the like of the synthetic resin or rubber as the composition component of the polymer admixture are not particularly limited, and can be appropriately selected and used as long as the effects of the present invention are not impaired. Moreover, these may be used individually by 1 type, or may be used in combination of 2 or more types arbitrarily. In the case of a synthetic resin, it is generally necessary to increase the compounding ratio as compared with rubber from the viewpoint of securing the elongation at break of the elastic mortar.

  Examples of the polymer admixture include emulsions, re-emulsifying powder resins (JIS A 6203), aqueous polymer solutions, and liquid polymers (monomers). Of these, any of them may be used as long as it is miscible with the hydraulic inorganic composition (cement) and imparts elongation to cement paste or mortar, from the viewpoint of handling and cost, Emulsions, aqueous polymer solutions or re-emulsifying powder resins are preferred, and aqueous polymer dispersions of emulsions are particularly preferred.

The emulsion is preferably one which can impart desired elasticity (flexibility) to the mortar, and can also impart dimensional stability, impact resistance, crack resistance, and more preferably weather resistance. Specifically, examples of the resin emulsion include (meth) acrylic type, vinyl acetate type, vinylidene chloride type, vinyl chloride type, and epoxy type. Examples of the rubber emulsion (latex) include SBR and NBR.
These emulsions may be used singly or in combination of two or more as required.

Said polymer admixture, in particular an aqueous polymer dispersion, must release the contained water in order to form a polymer film. This moisture is released by evaporation, but when cured by a hydration reaction, it is incorporated into a hydraulic inorganic composition that requires a large amount of water.
Therefore, by combining the polymer admixture and the hydraulic inorganic composition, an elastic mortar that is inexpensive, has an appropriate density, has an elongation at break of 5% or more, and has excellent sound insulation properties. be able to.

  Selection of the composition component and form of the polymer admixture needs to be performed in consideration of workability, consistency, and the like according to the use location and purpose of use of the soundproof coating member. For example, when light resistance and flame retardancy are required, it is preferable to select CR, and when aiming at elongation performance, NR, MBR, etc. are selected.

The blending ratio of the polymer admixture to the hydraulic inorganic composition varies depending on the material used, the desired elongation at break of the elastic mortar, and the like. For example, Celetac G (registered as an aqueous polymer dispersion as a polymer admixture) When using a trademark; Showa Denko Building Materials Co., Ltd.), the elongation at break of 5% or more can be ensured by setting it to 0.05 to 3, preferably 0.1 to 2.0. When the desired elongation at break is larger, the blending ratio may be increased.
The polymer admixture is considerably more expensive than other constituent materials of the elastic mortar such as a hydraulic inorganic composition, so that the blending amount is preferably small as long as the effects of the present invention are obtained.

Further, the nonwoven fabric or open cell foam used for the inner layer and the mortar impregnated layer of the soundproof coating member plays a role of a sound absorbing material when drainage or the like flows in the pipe, and also has a damping effect. .
In the nonwoven fabric, the fibers are randomly oriented, and in the open cell foam, the open cells are three-dimensionally formed. Therefore, the strength against pulling and bending is three-dimensionally uniform, and mortar is used. It can be dispersed and impregnated evenly.
Further, it is a material that can easily form a cylindrical body having an inner diameter corresponding to the outer periphery of the pipe, that is, a three-dimensional shape that covers the pipe without a gap. In particular, a material rich in flexibility is preferable because it can be easily molded and can absorb shrinkage accompanying the curing of the impregnated elastic mortar and distortion caused by molding.

The nonwoven fabric used in the present invention is preferably a compressed body of organic or inorganic fibers or a needle punched felt.
The material of the nonwoven fabric fiber may be either an organic fiber or an inorganic fiber. Examples of the organic fibers include polyethylene terephthalate (PET polyester), polyamide (6-nylon, 6,6-nylon, etc.), acrylic, vinylon, polyolefin, cotton, wool, and the like. Examples of the inorganic fiber include glass fiber, rock wool, and ceramic fiber. Of these, inorganic fibers are preferable from the viewpoint of fire resistance, but from the viewpoint of physical properties and price, and ease of handling such as being able to use commercially available products as they are, in particular, synthetic fibers such as polyesters. The nonwoven fabric which consists of is preferable.

The nonwoven fabric is preferably a compressed body or a needle punched felt from the viewpoint of the permeability of the elastic mortar, the sound absorbing effect, and the like.
The thickness of the nonwoven fabric can be appropriately determined according to the material, the purpose of use of the soundproofing covering member, the use location, and the like, but is usually 3 to 30 mm, preferably 5 to 10 mm.

  Moreover, as an open cell foam, a foaming urethane foam etc. can be used, for example, and it can be used by the thickness substantially the same as the said nonwoven fabric. However, the open cell foam generally has a smaller reinforcing effect on the elastic mortar to be impregnated than the nonwoven fabric.

  The nonwoven fabric or the open cell foam used for the inner layer and the mortar-impregnated layer may be integrated from the beginning or may be separate. For example, the inner layer is a nonwoven fabric and the open-cell foam is used for the mortar-impregnated layer. Thus, different materials may be used. Further, in order to shorten the impregnation time of the mortar, the surface density of the nonwoven fabric or the open cell foam in the mortar impregnation layer may be smaller than that of the inner layer. Thus, even if the nonwoven fabric or the open cell foam in the inner layer and the mortar impregnated layer is separate, they are integrated and do not peel by impregnating the elastic mortar.

  The mortar-impregnated layer is a mortar layer reinforced with a non-woven fabric or open cell foam as described above, and is excellent in sound insulation, as well as cracks caused by vibration even when drainage flows in the pipe to be coated. Is unlikely to occur and there is no risk of peeling or dropping. Therefore, the soundproof covering member according to the present invention is suitable as a covering member for drainage pipes of high-rise or low-rise houses or buildings.

The thickness of the mortar-impregnated layer, or when the mortar layer is formed outside thereof, the total thickness of the mortar-impregnated layer and the mortar layer depends on the purpose of use of the soundproof coating member, the use location, etc. Although it can determine suitably, it is preferable that it is 0.5-5 mm from viewpoints of sound insulation, intensity | strength, construction ease, etc., More preferably, it is about 1-3 mm. The sound insulation improves as the thickness increases, but if it is too thick, the flexibility of the soundproof coating member decreases, the weight increases, handling in transportation and field construction becomes difficult, and the cost increases.
In addition, when the mortar impregnated into the nonwoven fabric or the open cell foam is cured, the thickness may vary due to some shrinkage, but the thickness of the mortar impregnated layer is the initial value after mortar curing and before mortar impregnation. The thickness of the non-woven fabric or open-cell foam is approximately the same.

The material of the pipe covered with the soundproof covering member is not particularly limited, but in consideration of lightness, strength, price, workability, etc., a synthetic resin used for general pipes Pipe making is preferably used. For example, a tubular body made of a thermoplastic resin such as a rigid polyvinyl chloride pipe (PVC pipe), a polyethylene terephthalate pipe (PET pipe), or a polypropylene pipe (PP pipe) can be mentioned. In addition to the synthetic resin pipes as described above, cast iron pipes, vinyl chloride lining steel pipes, cast iron special joints, and the like may be used.
The shapes of these pipes are not particularly limited, and may be any of straight pipes, bent pipes, Y-shaped pipes, T-shaped pipes having a branch, joints, and the like.

The soundproof covering member is a cylindrical body having an inner diameter corresponding to the outer periphery of the pipe as described above, and has a split groove in the longitudinal direction of the cylindrical body, and is a single body.
As described above, in the case where the soundproof covering member covers a pipe without branching, if a single groove is provided, the soundproof covering member can maintain a single form without dividing the member. Can do. Therefore, the trouble of confirming the combination of each member and the joint location in the case of a divided member can be saved, and handling is easy.
When the pipe has a complicated shape such as a pipe having a branch, it is necessary to provide a plurality of split grooves, but even in this case, the soundproof covering member that covers these is not divided, What is necessary is just to make it provide a split groove in the location which can hold | maintain the form as a single unit.

Since the soundproof covering member has flexibility and elasticity, it can be mounted by expanding the part of the split groove and fitting it into the pipe from the expanded part.
As described above, the soundproof covering member according to the present invention can be easily attached to the pipe, is excellent in workability, and fits without forming a gap with the outer surface of the pipe. Can do.

After the pipe is covered with the soundproof covering member, the portion of the split groove is fastened so as to be covered with an adhesive tape or the like from above. Since the part of the split groove becomes a break in the soundproof coating member, it is preferable to provide the shortest possible distance in order to suppress the decrease in soundproofing as much as possible.
By doing so, the soundproof covering member according to the present invention can be attached and fixed to the outer peripheral surface of the pipe with as few seams as possible even when post-installed on the pipe.

FIG.1 and FIG.2 shows an example of a state and a state of mounting the soundproof covering member according to the present invention. 1 and 2 illustrate the case where the pipe is an L-shaped joint 4. The soundproof covering member 1 has a two-layer structure in which an inner layer is a nonwoven fabric or open-cell foam 2 and an outer layer is a mortar-impregnated layer 3 in which an elastic mortar is impregnated with a nonwoven fabric or open-cell foam, and corresponds to the outer periphery of the L-shaped joint 4. A split body 5 is provided in the longitudinal direction of the cylindrical body. When the pipe is such a curved pipe, it is preferable that the pipe is provided in a portion having a small curvature in order to make the split groove 5 a short distance.
As shown in FIG. 1, the installation of the soundproof covering member 1 is performed by expanding the portion of the split groove 5 and fitting it into the L-shaped joint 4 from this expanded portion.
As shown in FIG. 2, there is no gap between the soundproof covering member 1 after mounting and the outer peripheral surface of the L-shaped joint 4, and there is no gap in the part of the split groove 5. The soundproof covering member 1 can be fixedly attached and the L-shaped joint 4 can be covered by, for example, covering the split groove 5 so as to be covered with an adhesive tape or the like from above.

The soundproof coating member according to the present invention as described above is obtained by covering the outer peripheral surface of a pipe member or mold having the same shape as the pipe to be coated with a nonwoven fabric or open-cell foam, and then mixing the hydraulic inorganic composition and the polymer from the outer surface. The inner layer is a nonwoven fabric or open-cell foam, and the outer layer is a mortar-impregnated layer by impregnating an elastic mortar composed of an agent and having an elongation at break of 5% or more, and drying and curing to form a mortar-impregnated layer. A process of producing a cylindrical body and a process of forming a split groove in the longitudinal direction of the cylindrical body and removing it from the pipe or mold so that the cylindrical body maintains the state of an integrally molded product. Can be manufactured.
According to such a manufacturing method, a soundproof covering member having a size and shape suitable for the shape of the pipe can be manufactured easily and at low cost. Further, the outer mortar impregnated layer which is the sound insulating layer can be formed integrally with the inner layer which is the sound absorbing layer without using an adhesive or a pressure sensitive adhesive, and further, the soundproof covering member is divided. It can obtain without retaining the form as a simple substance.

  As described above, since the thickness of the nonwoven fabric or open cell foam hardly changes even after the impregnated mortar is cured, the nonwoven fabric or open cell foam of the mortar impregnated layer has a desired thickness of the mortar impregnated layer in advance. Just prepare and wrap it. Therefore, the thickness of the mortar impregnation layer can be easily adjusted.

The non-woven fabric or open-cell foam may be wound using a flat one as described above, or three-dimensionally formed by press processing in advance according to the shape of the outer peripheral surface of the pipe to be coated. You may make it cover the outer peripheral surface of the said piping member or type | mold using what was done.
Taking advantage of the material properties of the nonwoven fabric or open-cell foam, preliminarily performing such three-dimensional molding, especially in the case of a pipe having a complicated shape such as a pipe having a branch or a joint, This is preferred because it is easier and more efficient to manufacture.
In this case, the three-dimensionally formed nonwoven fabric or open-cell foam may be an integrally molded product or may be in a divided state. In any case, since the cylindrical body can be integrated by impregnating the elastic mortar, there is no problem.

The method of impregnating the non-woven fabric or open-cell foam covering the outer peripheral surface of the piping member or mold with mortar is not particularly limited, and can be performed by, for example, coating, pouring, spraying, dipping, or the like. .
By impregnating the entire surface of the nonwoven fabric or open-cell foam with such a method, the mortar impregnated layer is formed in an integrated state with the inner layer by drying and curing the mortar.
The conditions for drying and curing the mortar are appropriately determined according to the elastic mortar to be used, the environment and the like, but are usually dried and cured in about 1 to 3 days for natural curing.

In the manufacturing process of the said cylindrical body, you may form the mortar layer which consists of the said elastic mortar in the outer side of the said mortar impregnation layer.
Thus, soundproofness can be improved more by comprising the outer surface of a soundproofing covering member by the layer which consists only of elastic mortar, and making it 3 layer structure.
The mortar layer may be formed by subsequently applying, spraying, or dipping the elastic mortar before drying / curing the mortar-impregnated layer, or alternatively, drying / curing of the mortar-impregnated layer. You may form separately after hardening.

  In addition, the soundproofing covering member is not limited to flexibility and elasticity, workability at the time of construction, etc. It is free to coat with a surface coating material such as elastic mortar, resin film, woven fabric, non-woven fabric, and paint.

1 Soundproofing covering member 2 Nonwoven fabric or open cell foam (inner layer)
3 Mortar impregnated layer (outer layer)
4 L-shaped joint (piping)
5 Split groove

Claims (9)

A soundproof covering member for covering the pipe,
An inner layer composed of a nonwoven fabric or an open-cell foam, and an outer layer composed of a mortar-impregnated layer obtained by impregnating a nonwoven fabric or an open-cell foam with an elastic mortar composed of a hydraulic inorganic composition and a polymer admixture of 5% or more at break And
A cylindrical body having an inner diameter corresponding to the outer periphery of the pipe, wherein a split groove is provided in a longitudinal direction of the cylindrical body, and is a single body and is mounted by being fitted into the pipe. Soundproof covering member.   The soundproof covering member according to claim 1, wherein a mortar layer made of the elastic mortar is formed outside the mortar impregnated layer.   The soundproof covering member according to claim 1 or 2, wherein the hydraulic inorganic composition is made of cement or cement and non-hydraulic inorganic powder.   The soundproofing property according to any one of claims 1 to 3, wherein the polymer admixture is at least one selected from an aqueous polymer dispersion, an aqueous polymer solution, and a re-emulsifying powder resin. Covering member.   The soundproof covering member according to any one of claims 1 to 4, wherein the nonwoven fabric is a compressed body of organic or inorganic fibers or a needle punched felt. The density of the elastic mortar, soundproofing coating member according to any one of claims 1 to 5, characterized in that 1.3 g / cm ³ or more. A method for producing a soundproof covering member for covering a pipe,
After covering the outer peripheral surface of the piping member or mold having the same shape as the piping to be coated with a nonwoven fabric or open cell foam, the elongation at break consisting of the hydraulic inorganic composition and the polymer admixture from the outer surface is 5% or more. Impregnating an elastic mortar, drying and curing to form a mortar impregnated layer, thereby producing a cylindrical body in which the inner layer is a nonwoven fabric or open-cell foam and the outer layer is a mortar impregnated layer;
A step of forming a split groove in the longitudinal direction of the cylindrical body and removing it from the piping member or mold so that the cylindrical body maintains a state of an integrally molded product. A manufacturing method of a covering member.   The method for producing a soundproof covering member according to claim 7, wherein the nonwoven fabric or the open cell foam is three-dimensionally formed by press working in accordance with the shape of the outer peripheral surface of the pipe to be covered.   The method for producing a soundproof covering member according to claim 7 or 8, wherein, in the manufacturing step of the cylindrical body, a mortar layer made of the elastic mortar is formed outside the mortar impregnated layer.

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