JPH10252977A - Manufacture of sound insulation material for pipe and sound insulation structure for pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulation material for a pipe capable of improving the workability and surely insulating the sound. SOLUTION: A sound insulation material 13 for a pipe is provided with a sound absorption layer 16, a sound insulation layer 15, and an adhesive layer 17, and the noise generated from the pipe can be reduced by covering the material around the outer circumference of the pipe. The sound insulation material 13 for the pipe includes a curved layer 14, and in the curved layer 14, the inner surface of the sound insulation material 13 of the pipe is curved along the pipe. The sound insulation material for the pipe realizes the efficient fitting work to the pipe, and the pipe can be surely sound-isolated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a soundproofing material for piping. The pipe soundproofing material reduces noise generated when a substance moves in the pipe, and is attached to the outer periphery of the pipe.
More specifically, the present invention relates to a pipe soundproofing material capable of facilitating the work of attaching the pipe soundproofing material to the pipe.

[0002]

2. Description of the Related Art In recent years, a quiet living environment has been emphasized, and a general house has been designed to block external noise.
Further, in such a house, noise based on a sound source in the dwelling unit has become easier to hear as the external noise is reduced.
Noise sources include the sound of water around dwelling units, such as toilets,
This is the sound of drainage from baths, kitchens, and wash basins. In order to prevent such noise from being heard downstairs or the like, in a general house, measures are taken to reduce the noise by attaching a pipe soundproofing material to the pipe.

[0003]

In the construction work of houses and the like, how to shorten the construction period is one of the important themes. However, as described above, at present when the original soundproofing effect of the pipe soundproofing material is recognized, if the pipe soundproofing material is applied to the pipe, noise such as drainage noise can be significantly reduced. For this reason, this construction work required not only plumbing work but also soundproofing work using soundproofing materials for piping. Against this background, it is important how soundproofing works quickly and reliably.

[0004] The conventional soundproofing material for pipes is to peel off release paper covering the adhesive surface with a width of about 5 to 10 cm and temporarily fix it to the pipe.
The release paper was peeled off while being pulled so as not to wrinkle the pipe soundproofing material, and the pipe was pressed and adhered to the pipe. However, such work was extremely troublesome and extremely difficult when working on a narrow part such as a pipe space or on a stepladder. In addition, it was necessary to apply a Johnite tape to the end of winding of the pipe soundproofing material to prevent sound leakage. Furthermore,
In such a pipe soundproofing material, it was necessary to prevent delamination and to attach members to each other in the pipe circumferential direction to prevent a gap. It should be noted that the release paper was not particularly considered, and the portion at the beginning of peeling was difficult to peel off, and was extremely troublesome with gloves.
Thus, the work of attaching the pipe soundproofing material to the pipe is still a labor and time-consuming heavy labor. For this reason,
The theme of the present inventors is how to make the installation work of the pipe soundproofing material more efficient.

An object of the present invention is to provide a pipe soundproofing material that can improve workability and reliably perform soundproofing processing.

[0006]

The pipe soundproofing material of the present invention comprises:
It is provided with an adhesive layer, a sound absorbing layer, and a sound insulating layer, and by applying the pipe soundproofing material to the outer periphery of the pipe, noise generated from the pipe can be reduced. In the present invention, the pipe soundproofing material includes a curved layer, and the curved layer curves the inner surface of the pipe soundproofing material along the pipe. Such a pipe soundproofing material can make the work of attaching to the pipe more efficient, and can surely perform soundproofing processing on the pipe.

First, the present inventors reviewed the installation work itself in order to increase the efficiency of the work of installing the pipe soundproofing material. As a result of examining many cases at actual sites, the present inventors have determined that it is extremely effective to facilitate temporary fixing of the pipe soundproofing material. This is because it was important to reduce the time and effort required for temporary fixing work in order to efficiently attach the sound insulation material to the pipe.

[0008] Next, the present inventors have studied how the pipe soundproofing material can be actually used to facilitate temporary fixing. As a result, the present inventors have found that a pipe soundproofing material that is curved in advance is effective for efficient work. This is because positioning is easy if the pipe soundproofing material is curved in the direction in which the pipe is wound.

When temporarily fixing the pipe soundproofing material, it is necessary to move the pipe soundproofing material right and left and back and forth for alignment. After examining this point, the present inventors provided an adhesive portion of the pipe soundproofing material only at a predetermined position,
It has been found that making the other part a non-adhesive part significantly contributes to the efficiency of the soundproofing process. Various adhesives can be used for such an adhesive portion, and the adhesive force can be adjusted by selection. With the pipe soundproofing material having such an adhesive portion, it is easy to peel off the temporary fixing portion for positioning and temporarily fix it again.

[0010] The present inventors have confirmed that these pipe soundproof materials significantly improve workability and do not impair the soundproof performance, and have achieved the present invention. By using the pipe soundproofing material of the present invention, pipes can be safely used even in a narrow place or on a stepladder,
In addition, the soundproofing process can be easily and reliably performed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The pipe soundproofing material of the present invention has a curved shape. With this curved form, the pipe soundproofing material is easily positioned on the pipe, and the pipe is easily covered. Such a curved form is provided by bending one or both of the sound absorbing layer and the sound insulating layer, which are essential components of the pipe sound insulating material. Also, such a curved form is
Provided by adding a curved layer to the pipe sound insulation.
In the former, the sound absorbing layer or the sound insulating layer is curved alone, or is adhered so as to be curved at the time of molding or laminating the pipe sound insulating material. In the latter, a layer molded into a cylinder,
Alternatively, a metal or rigid plastic or the like wound in a film or sheet shape is conceivable.

In particular, when a film or sheet of plastic, metal, or the like is used for the curved layer, it is preferable that the curved layer be the outermost layer of the pipe soundproofing material. When such a curved layer is used on the entire outer periphery of the pipe soundproofing material, it is possible to prevent a trace amount of solvent, plasticizer, and the like from volatilizing from the pipe soundproofing material. The pipe soundproofing material having such a curved layer can shut out a causative substance causing the house sick syndrome, which has begun to attract attention in recent years, and is preferable not only in workability but also in health and safety.

Further, in the pipe soundproofing material of the present invention, it is preferable that the adhesive layer is provided only at a predetermined position and the other part is a non-adhesive part. In the present invention, such an adhesive layer can be provided only on both ends of the start portion and the end portion of the pipe soundproofing material. In order to cover a pipe using such a pipe soundproofing material, an adhesive portion at one end is temporarily fixed to the pipe, and the pipe soundproofing material is aligned. Thereafter, the temporarily fixed portion is pressure-bonded so that the non-adhesive portion surrounds the pipe, and the adhesive portion at the other end is attached to the pipe.

A layer having a predetermined hardness is provided on at least one of the winding start portion and the winding end portion of the pipe soundproofing material, and an adhesive layer is provided on the side of the layer in contact with the pipe. preferable. The winding start portion and the winding end portion of the pipe soundproofing material are used as temporary fixing portions. Such a temporarily fixed portion can be easily separated and re-fixed even when the temporarily fixed position is slightly shifted. This is because the sound absorbing layer is generally soft, and it is difficult to reattach the sound absorbing layer even if an adhesive layer is provided on the sound absorbing layer.

For this reason, in the present invention, the sound insulating layer is made longer than the sound absorbing layer, and protrudes from one or both sides of the winding start part and the winding end part of the pipe sound insulating material, and the adhesive layer is formed on the sound insulating layer. Can be provided. In the case of a sound insulation layer with a relatively solid shape, it can be easily pasted and peeled,
It is suitable for temporary fixing.

Further, the winding end portion having relatively high hardness can be overlapped with the winding start portion. By performing the soundproofing process in this manner, no gap is generated between the winding start portion and the winding end portion. In such a soundproofing process, the labor for attaching the joint tape in the flow path direction of the pipe can be omitted, and the workability of the soundproofing process is improved. Furthermore, when the winding start portion having a relatively high hardness and the winding end portion having a relatively high hardness are overlapped with each other, since both are high in hardness, re-pasting can be performed more speedily and workability is further improved.

[0017] In such a pipe soundproofing material, it is preferable that at least the winding end portion is formed of a material as thin as possible. By using such a winding end portion, a step formed at the winding end portion of the pipe soundproofing material can be reduced. Further, the winding end portion can be overlapped with the outside of the winding start portion or the outside of the pipe soundproofing material including the sound absorbing material. If the pipe soundproofing material is applied in this way, the soundproofing performance is not impaired. When the winding end portion is placed outside the pipe soundproofing material containing the sound absorbing material, the entire outer periphery of the pipe can be covered with the pipe soundproofing material including the sound absorbing layer and the sound insulating layer.

The release layer covering the pressure-sensitive adhesive layer needs to protect the pressure-sensitive adhesive layer and to be easily peeled off. The area of the release layer is slightly larger than the area of the adhesive layer.
This makes it possible to easily form the part where the release layer starts to be peeled off.

The pressure-sensitive adhesive layer can be provided by applying a pressure-sensitive adhesive in a dot-like manner or by applying a thin linear shape. Such an adhesive layer can make the release layer more easily peelable while maintaining a predetermined adhesive force.

As the curved layer used in the present invention, a layer that is neither a sound absorbing layer nor a sound insulating layer can be used. In the present invention, at least one of the sound absorbing layer or the sound insulating layer is curved,
Still other curved layers can be added. Examples of the material of the curved layer include thin plates, foils, and nets of metals such as iron, stainless steel, copper, and aluminum, and films, sheets, and nets of synthetic resins such as polyester, vinyl chloride, polyethylene, polypropylene, and nylon. Can be. These materials can be used as they are, provided that they are supplied in a long roll and have a convex curved surface toward the outer periphery of the roll.

When a thin sheet or foil of metal or a sheet or film of synthetic resin is provided on the entire outer periphery as such a curved layer, a trace amount of a sound absorbing material, a sound insulating material, a pressure-sensitive adhesive or the like which is volatilized from the constituent materials of the pipe sound insulating material. Chemical substances such as plasticizers and solvents can be shielded. Such a function of the curved layer is caused by the house sick syndrome (which is recently considered to be caused by a trace amount of a chemical substance (particularly, formalin, etc.) generated from building materials in a newly built house). The prevention effect can also be expected.

In the present invention, the following classes of sound absorbing layers can be roughly classified. There are three types: those composed of a fiber layer, those composed of an open-cell structure, and those composed of porous materials in which particulate matter is bound by a binder or the like. In the present invention, any of the sound absorbing layers can be used alone or in combination.

The sound absorbing layer composed of a fiber layer includes inorganic fibers such as glass wool and rock wool, metal fibers such as iron, aluminum, copper and stainless steel, and natural fibers such as cotton, acrylic, polyester, polypropylene, nylon and rayon. Or synthetic fibers alone or in combination, flocculent,
It can be used after being processed into a mat shape, a felt shape, a nonwoven fabric shape and the like.

The sound absorbing layer having an open-cell structure includes rubber such as natural rubber, EPT and CR, liquid polymer such as urethane and liquid polybutadiene, and synthetic resin such as polyethylene and polypropylene. Shape,
It can be processed into a cylindrical shape and used. By making a cut in at least one portion in the longitudinal direction of the tube, the cylindrical sound absorbing layer can also exhibit the effect as a curved layer.

The sound-absorbing layer in which the granular material is bound with a binder or the like can be obtained by compression-molding a granular material obtained by pulverizing rubber, plastic, various foams, or the like, or a pulverized product of paper or fiber together with the binder. In such a sound absorbing layer, a continuous space is formed between the granular materials, and such a space exhibits a sound absorbing effect.

The above-mentioned various sound absorbing layers are formed by mixing or laminating materials having different fiber diameters, or by laminating a film or a perforated film, or by changing the layer thickness to improve the sound absorbing effect in a specific frequency range. It can be devised.

The sound insulation layer used in the present invention is prepared by kneading a filler or a plasticizer commonly used in the rubber industry with a polymer system using various rubbers, synthetic resins, thermoplastic elastomers or the like alone or in combination, and rolling. It is a sheet-like material obtained by the above. Such a sheet-like material may be a liquid reaction cured product regardless of vulcanization or non-vulcanization. Also, using such a sound insulation layer,
The pipe preventing material can be curved so that the pipe sound insulating material is easily wound around the pipe. For this purpose, a sound insulating layer formed into a cylindrical shape and having a cut in at least one portion in the flow path direction of the pipe is preferable.

The pipe soundproofing material of the present invention can be curved when the above-described sound absorbing layer and sound insulating layer are laminated. An example of the method is a method in which a sound absorbing layer and a sound insulating layer are attached to each other on a curved surface such as a cylindrical object. Regardless of the method, any method that bends the pipe soundproofing material and improves the workability of installation is effective for the present invention.

The adhesive layer used in the present invention includes natural rubber, butyl rubber, butyl reclaimed rubber, polyisobutylene, SI
S, SBS, polymers such as rubber or thermoplastic elastomers such as SIES alone or in combination, tackifiers, fillers, plasticizers, those appropriately blended with solvents, etc., or solvent-based or water-based acrylic adhesives, Hot-melt adhesives, double-sided tapes and the like can be used.

In order for the pressure-sensitive adhesive to exert its effect at the time of application, it is necessary to cover the surface with a release layer. The release layer may be any material used for coating the pressure-sensitive adhesive, such as release paper or release film. However, in the present invention, from the viewpoint of improving workability, the release layer is made easily peelable. From this point, it is preferable that the material of the release layer is slightly thick, which is hard to be torn and easily generates a gripping margin at the start of peeling. Also, regarding the balance between the adhesive force of the adhesive layer and the adhesive force of the release layer, it is necessary to select a release layer that does not adhere excessively and does not peel off in consideration of the temperature sensitivity of the selected adhesive. is there.
When selecting, consider the period, place of use, etc. It is safer to have a slightly higher adhesive force, and therefore, the tendency for workability to deteriorate is inevitable. Therefore, in order to determine the ease of peeling, other methods, such as covering with a release layer larger than the adhesive layer and leaving extra space on the sound absorbing layer side, are preferable. By using such a method, the sound absorbing layer is soft, and the margin of the releasing layer can be made by simply pressing the boundary between the releasing layer and the sound absorbing layer, and the operation can be performed while wearing gloves.

[0031]

Next, the present invention will be described with reference to examples and comparative examples. Example 1 A pipe soundproofing material according to an example of the present invention was manufactured. FIG. 1 (a)
It is a perspective view of this pipe soundproofing material. This pipe soundproofing material 1 was provided with a non-adhesive part 7 on the side that comes into contact with the pipe. In the non-adhesive portion 7, the nonwoven fabric 3 having a thickness of 6 mm was exposed. Acrylic pressure-sensitive adhesive layers 4 and 5 using toluene as a main solvent were provided on the nonwoven fabric 3 in portions other than the non-adhesive portions 7. These adhesive layers 4 and 5 were covered with release papers 6 and 8, respectively. The non-adhesive portion 7 is located on the surface of the pipe soundproofing material 1 covering the pipe.
/ 2 area. The adhesive layers 4 and 5 are provided in the form of strips at the winding start portion 1a and the winding end portion 1b of the pipe soundproofing material 1, respectively. Have. The release papers 6 and 8 were set slightly larger than the width of the adhesive layers 4 and 5. In this pipe sound insulating material 1, a 2-mm thick butyl rubber sound insulating material 2 was provided in addition to the nonwoven fabric 3. The butyl rubber sound insulating material 2 and the nonwoven fabric 3 as a sound absorbing material were adhered to each other using an acrylic pressure-sensitive adhesive layer containing toluene as a main solvent.

FIG. 1B is a cross-sectional view showing an example of a soundproof structure for piping according to the present invention. The pipe soundproofing structure 9 is such that the pipe soundproofing material 1 is attached to the outer periphery of a pipe 10. The release paper 6 is peeled off so that the adhesive layer 4 of the winding start portion 1a is exposed, and the adhesive layer 4 is adhered to a predetermined position of the pipe 10 while bending the adhesive layer 4 along the pipe. Next, the exposed nonwoven fabric 3 is brought into close contact with the outer periphery of the pipe 10 so as to surround the pipe 10 with the non-adhesive portion 7. Thereafter, the release paper 8 is peeled off so that the adhesive layer 5 of the winding end portion 1b is exposed, and while the adhesive layer 5 is curved along the piping,
It is adhered to a predetermined position of the pipe 10. Finally, winding start part 1
The joint tape 12 with an adhesive layer is attached so as to cover the boundary 11 so that no gap is formed between the boundary 11 and the winding end 1b. In this example, a pipe soundproofing structure was manufactured in this way, and a test channel was prepared.

Incidentally, in the soundproofing treatment of the pipe of the irregularly shaped portion, a 2 mm-thick butyl rubber-based viscoelastic body, a 2 mm-thick sheet having a closed cell chamber and a cross-linked viscoelastic body,
A 4 mm thick nonwoven fabric and a 2 mm thick non-vulcanized butyl rubber sheet were applied. A sheet having a closed-cell chamber and a crosslinked viscoelastic body is formed by alternately and continuously forming a convex portion formed from the closed-cell chamber and a concave portion consisting only of a film, and filling the concave portion of the sheet with a polybutadiene-based liquid rubber composition. Then, a crosslinked viscoelastic body was formed by a curing reaction.

A joint tape with an adhesive layer was wrapped around the boundary between the pipe soundproofing materials of the straight pipe part and the boundary between the pipe soundproofing material of the odd-shaped part and the pipe soundproofing material of the straight pipe part. . For the adhesive layer of the joint tape, a recycled butyl rubber-based adhesive using toluene as a solvent was used. The substrate is non-vulcanized butyl rubber, and the adhesive layer is covered with a release film.

The pipe soundproofing material and the pipe soundproofing structure were tested for workability, noise level, and toluene volatilization amount. In this test, the following points were evaluated.

1. Workability (1) Removal of Release Layer The total time required for removal of the release layer was measured for 10 pieces of pipe soundproofing materials. The same measurement was performed for five workers, and the average value per worker was expressed in units of 10 seconds, and is shown in Table 1.

(2) Temporary fixing The total time required for removing, temporarily fixing, aligning, and fixing the release layer was measured for the three pipe soundproofing materials. The same measurement was performed for five workers, and the average value per worker is shown in Table 1 in units of 10 seconds.

(3) Adhesion The time required to adhere the pipe soundproofing material to the entire pipe in the test channel was measured. The results are shown in Table 1 in minutes. As the worker, one person closest to the average value of the operations (1) and (2) was selected.

2. Noise level After applying soundproofing material to the entire pipe of the test channel, the pipe was drained from the toilet on the upper floor, and the noise level from the start of drainage to the end of the flow was measured. Table 1 shows the maximum value of the noise level. FIG. 5 is a sectional view of a test room for measuring a noise level. The test room includes a measurement room 54 and an analysis room 60 separated by a partition 57. The measurement chamber 54 has a test channel 55 and a microphone 5 for collecting generated noise.
6 are arranged. In the analysis room 60, a sound level meter 61 and a frequency analyzer 62 are arranged. Test channel 55
Is tested by draining drainage from the toilet 52 on the second floor 53. This test room has a second floor 53, left and right walls 59,
It is shielded from the outside by 63 and the first floor 58.

3. Detection of Toluene A PVC VU pipe was connected to the gas detection device, a pipe soundproofing material was attached to the outer periphery of the pipe, and the inside was sealed. Then, hot water was circulated in the pipe. Then, the air in the apparatus was measured with a toluene-dedicated detector tube. Table 1 shows the results. FIG. 6 is a perspective view of such a toluene detection device. 75 mmφ for the pipe 64
Is used. Inner size 1000mm
In a gas detection device 65 of × 1000 mm × 1000 mm, a pipe soundproof material 66 is attached to the outer periphery of the pipe 64. The piping 67 outside the gas detection device 65
Is provided with a heat insulating material 68 on its outer periphery. After sealing the inside of the gas detection device 65, the piping 64, 67
Inside, hot water of 50 ° C. is continuously circulated for 6 hours. For this purpose, a constant temperature water tank 69, a temperature adjusting / stirring device 70, and a pump 71 are arranged in this detecting device.

Example 2 A pipe soundproofing material of another example of the present invention was manufactured. FIG. 2 (a)
Is a cross-sectional view of the pipe soundproofing material. The pipe sound insulating material 13 includes a curved layer 14, a sound insulating layer 15, a nonwoven fabric 16, adhesive layers 17, 18, 19, and release papers 20, 22. Further, the pipe soundproofing material 13 was provided with a non-adhesive portion 21 on the side in contact with the pipe. In the non-adhesive portion 21, the nonwoven fabric 16 having a thickness of 4 mm was exposed. Recycled butyl rubber-based adhesive layers 17 and 18 using toluene as a solvent were provided on the upper surface of the nonwoven fabric 16 except for the non-adhesive portion 21. These adhesive layers 17, 1
8 was covered with slightly larger release papers 20 and 22, respectively. The non-adhesive portion 21 has an area of 1/12 of the entire area inside the pipe soundproofing material 13.

In this pipe soundproofing material, a non-vulcanized butyl rubber sound insulating layer 15 having a thickness of 2 mm was provided on the outer periphery of a nonwoven fabric 16. In addition, in the pipe soundproofing material 13, 150 μm
Curved layer 1 made of thick aluminum evaporated polyester film
4 were provided. The sound insulation layer 15 and the curved layer 14 protrude in a belt shape with a length of 50 mm at the winding end portion 13b of the pipe sound insulation material 13. The sound absorbing layer 16 is not provided on the winding end portion 13b. Instead, a reclaimed butyl rubber-based adhesive layer 19 using toluene as a solvent was provided on the sound insulating layer 15. The adhesive layers 17, 18, and 19 were each provided in a strip shape. For the non-vulcanized butyl rubber sound insulation layer, a regenerated butyl rubber-based adhesive using toluene as a solvent is applied to the entire inner surface and bonded to the nonwoven fabric 16, and the remaining band-shaped adhesive layer 1 is bonded.
Thick release paper 22 was stuck on the upper surface of 9. Next, the curved layer 14 was bonded to the outer periphery of the sound insulating layer 15.

A pipe soundproof structure according to another embodiment of the present invention was manufactured. FIG. 2B is a cross-sectional view of the pipe soundproof structure. The pipe soundproofing structure 23 is used to connect the pipe soundproofing material 13 to the pipe 2.
4 was produced in the same manner as in Example 1. However, in the pipe soundproofing material 13 according to the present embodiment, since the winding end portion 13b overlaps the outer periphery of the winding start portion 13a, the boundary 2 between the winding start portion 13a and the winding end portion 13b.
There is no need to connect the five. Therefore, the joint tape with the adhesive layer was applied to the boundary between the pipe soundproofing materials and the boundary between the pipe soundproofing material of the irregular shape part and the pipe soundproofing material of the straight pipe part so as to cover the boundary parts.

The pipe soundproofing material and the pipe soundproofing structure were tested in the same manner as in Example 1 for workability, noise level, and toluene volatilization amount. Table 1 shows the results.

Example 3 Still another example of the pipe soundproofing material of the present invention was manufactured. FIG.
(A) is a cross-sectional view of the pipe soundproofing material. The pipe sound insulating material 26 includes a curved layer 27, a sound insulating layer 28, a sound absorbing layer 29,
Adhesive layers 30, 31, 33, 34, split cloth 32 and release paper 3
5, 37. In the pipe soundproofing material 26, a 50-mm-wide band-shaped split cloth 32 was arranged at the center of the side in contact with the pipe. This split cloth 32 forms a non-adhesive surface. Sound absorbing layer 2
For 9, a 5 mm felt was used. A reclaimed butyl adhesive layer using toluene as a solvent was provided on the entire inner surface of the sound absorbing layer 29, and a split cloth 32 was attached to the center of the adhesive layer.
The remaining adhesive surface is separated into adhesive layers 31 and 33 by a split cloth 32.

Release paper was stuck on the entire surface of the adhesive layers 31 and 33. The release paper was cut in the longitudinal direction at approximately the center on the split cloth. The release paper is divided into release papers 35 and 37 by the cutting unit 36. Such release papers 35 and 37
Can be easily peeled off from the cutting portion 36. On the outer periphery of the sound absorbing layer 29, a vinyl chloride-based sound insulating layer 28 having a thickness of 1 mm is provided.
A μm copper thin plate was provided. For the bonding of the felt 29 and the vinyl chloride-based sound insulating layer 28 and the bonding of the vinyl chloride-based sound insulating layer and the copper thin plate, a regenerated butyl-based adhesive layer using toluene as a solvent was applied to the entire surface.

In the pipe sound insulating material 26, the sound insulation layer 28 and the curved layer 27 are formed at both the winding start portion 26a and the winding end portion 26b.
And the laminated portion consisting of One of the protruding portions can be temporarily fixed directly to the outer periphery of the pipe, and the other can be overlapped with the outer periphery of the temporarily fixed pipe soundproofing material. On the upper surface of the projecting sound insulation layer, regenerated butyl-based adhesive layers 30 and 34 using toluene as a solvent were provided in a belt shape. These adhesive layers 30,
A release paper is provided on the surface of the release layer 34. In this embodiment, release papers 35 and 37 provided on the sound absorbing layer 29 are continuous.

A pipe soundproof structure according to still another embodiment of the present invention was manufactured. FIG. 3B is a cross-sectional view of the pipe soundproof structure. The pipe soundproofing structure 38 is used to connect the pipe soundproofing material 26 to the pipe 3.
9 was produced in the same manner as in Example 2. The pipe soundproofing material 26 according to the present embodiment also has a winding start portion 2.
Since the winding end portion 26b overlaps the outer periphery of 6a, no gap is generated between these portions. Therefore, the joint tape with an adhesive layer was applied to the boundary between the pipe soundproofing materials and the boundary between the pipe soundproofing material of the odd-shaped portion and the pipe soundproofing material of the straight pipe portion so as to cover these boundaries.

The pipe soundproofing material and the pipe soundproofing structure were tested in the same manner as in Example 1 for workability, noise level, and toluene volatilization amount. Table 1 shows the results.

Example 4 A pipe soundproofing material of still another example of the present invention was manufactured. FIG.
(A) is a cross-sectional view of the pipe soundproofing material. The pipe sound insulating material 40 includes a sound insulating layer 41, a curved layer 42, a sound absorbing layer 43,
It consists of adhesive layers 44 and 45 and release films 46 and 48. The sound absorbing layer 43 is made of open-cell polyethylene having a surface unevenness having a thickness of 10 mm. In the sound absorbing layer 43, a reclaimed butyl rubber-based adhesive layer 44 using toluene as a solvent was provided in a belt shape at the winding start portion 40a on the side in contact with the pipe. A release film 46 was provided on the adhesive layer 44. The release film 46 is slightly larger than the application width of the adhesive layer 44,
The non-adhesive portion 47 was applied. The sound absorbing layer 43 on which the adhesive layer 44 is not provided is one side of the pipe sound insulating material 40 in the lateral direction.
A non-adhesive portion 47 is formed in the vertical direction with a width of / 4.

A curved layer 42 made of a hard vinyl chloride film having a thickness of 200 μm was attached to the outer periphery of the sound absorbing layer 43. The curved layer 42 bends the surface in contact with the pipe so as to be along the pipe. The curved layer 42 is formed of the pipe soundproofing material 40.
At the winding end portion 40b. In addition, the curved layer 4
2 is a 1 mm thick vinyl chloride-based sound insulating sheet 41
Was pasted. An acrylic pressure-sensitive adhesive containing a solvent mainly composed of toluene was applied to the inside and outside of the curved layer 42, and the sound absorbing layer 43 was attached to the inside surface of the curved layer 42, and the sound insulation sheet 41 was attached to the outside surface thereof. An acrylic adhesive layer 45 containing toluene as a main solvent remains in a strip shape on the upper surface of the projecting sound insulating sheet, and a release film 48 is formed on the surface of the adhesive layer 45.
Was provided. The release film 48 was made slightly larger than the application width of the adhesive layer 45 so as to cover the non-adhesive portion 47.

A further example of a soundproof structure for piping according to the present invention was manufactured. FIG. 4B is a cross-sectional view of the pipe soundproof structure. The pipe soundproof structure 49 was manufactured in the same manner as in Example 3 by attaching the pipe soundproof material 40 to the pipe 50. It is not necessary to apply a joint tape to the boundary 51 even in this pipe soundproof structure. The pipe soundproofing material and the pipe soundproofing structure were tested in the same manner as in Example 1 for workability, noise level, and toluene volatilization amount. Table 1 shows the results.

Comparative Example 1 A pipe structure was manufactured without using a pipe soundproofing material, and as it was with the pipe main body. The piping structure was tested in the same manner as in Example 1 for workability, noise level, and toluene volatilization amount. Table 1 shows the results.

Comparative Example 2 A pipe soundproofing material was manufactured in which the entire surface in contact with the pipe was an adhesive layer. Using this pipe soundproofing material, as in Example 1,
The piping structure was manufactured. A 6 mm thick nonwoven fabric was used for the sound absorbing layer. A reclaimed butyl rubber-based adhesive using toluene as a solvent was applied to the surface of the nonwoven fabric that was in contact with the pipe, and the surface was covered with release paper. The other surface of the nonwoven fabric was stuck on the entire surface of a non-vulcanized butyl rubber-based sound insulating sheet with a regenerated butyl rubber-based adhesive using toluene as a solvent. The workability, noise level, and toluene volatilization amount of the pipe soundproofing material and the pipe structure were tested in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 3 A pipe soundproofing material having an adhesive layer only at the end of winding was manufactured. For the sound absorbing layer, open-cell polyethylene was used. An acrylic pressure-sensitive adhesive containing toluene as a main solvent was applied to the piping side of the vinyl chloride sound insulation sheet. A sound-absorbing layer was bonded to the bonding surface of the sound-insulating sheet. At that time, a vinyl chloride-based sound insulating sheet was protruded in a belt shape from the winding end side of the pipe sound insulating material, and release paper was stuck to an adhesive surface having no sound absorbing material. There is no adhesive layer on the winding start side of the pipe soundproofing material.

Using this pipe soundproofing material, a pipe structure was manufactured in the same manner as in Example 1. However, the winding end side of the pipe soundproofing material was overlapped with the outer periphery of the winding start side. For this reason, the joint tape with an adhesive layer was used only in the same places as in Example 2.

[0057]

[Table 1]

As shown in Table 1, the pipe soundproofing material of Example 1 had a non-adhesive portion at the center, and the positioning at the time of attachment was further facilitated. In addition, the release layer is wider than the adhesive layer, and is provided with a portion that is not restricted by the adhesive layer. In addition, even in the pipe soundproofing structure having the non-adhesive portion, the noise prevention function which should be originally possessed was not hindered. As a result, the pipe soundproofing material of Example 1 was able to remove the release layer at half the speed of the conventional product shown in Comparative Example 2. Further, the pipe soundproofing material of Example 1 was applied at a rate of about 60% of that of the conventional product, and the discomfort such as troublesome work was eliminated in workability.

As shown in Table 1, the pipe soundproofing material of Example 2 had a curved layer, and the positioning at the time of attachment was further facilitated. Further, in this pipe soundproofing material, since the release layer was made of a thicker material, the release layer was further easily peeled off. Furthermore, in this pipe sound-insulating material, the sound insulating layer was protruded and the overlap was provided, so that the vertical joint tape could be omitted. As a result, the pipe soundproofing material of Example 2 had a coating speed of １ ／ or less compared to the conventional product of Comparative Example 2, and the workability was significantly improved. The pipe soundproofing structure using such a pipe soundproofing material also had a good noise level. Also,
In the pipe soundproofing material of Example 2, the amount of toluene volatilized is extremely small. In this pipe soundproofing material, an aluminum vapor-deposited polyester film is used for the outermost layer, and volatilization of toluene from the adhesive is prevented.

In the soundproofing material for pipes of Example 3, since the splitting cloth was arranged at the center and made non-adhesive, the positioning at the time of attachment was easy. In this pipe soundproofing material, a release layer is provided on the entire inner surface, and is vertically cut at the center of the non-adhesive portion. For this reason,
The gripping margin when removing the release layer was increased, and the release paper was more easily peeled off because it was not restrained by the non-adhesive portion. As a result, according to the pipe soundproofing material, the pipe soundproofing structure could be manufactured at a speed of half or less of the pipe soundproofing material of Comparative Example 2. In addition, in this pipe soundproof structure, the noise level was almost the same as that of Comparative Example 2 and was good. Furthermore, in the pipe soundproofing structure of Example 3, volatilization of toluene was not detected, and the volatilization of toluene from the pipe soundproofing material could be prevented.

In the pipe soundproofing material of Example 4, as the sound absorbing layer, open-celled polyethylene having irregularities on the surface was used. In this pipe soundproofing material, since the release layer was provided on this sound absorbing layer, the release layer had a weak binding force and was easily peeled off. As a result, this pipe soundproofing material took about half the working time as compared with that of Comparative Example 2. The pipe soundproof structure manufactured in this way had a good noise level, which was almost the same as that of Comparative Example 2. Furthermore, in this pipe soundproofing material, the amount of toluene detected was very small, and the effect of the curved layer was proved.

The piping structure of Comparative Example 1 has a noise level of 55
dB (A), which is significantly inferior to Examples 1 to 4 where Lmax is 17 to 19 dB (A). It is understood that the soundproofing effect is enhanced by providing the pipe soundproofing material.

The pipe soundproofing material of Comparative Example 2 is a conventional pipe soundproofing material. Since the adhesive layer is applied on the entire surface, workability is poor and room for improvement is recognized.

The pipe soundproofing material of Comparative Example 3 is a pipe soundproofing material having an adhesive layer only at the end of winding. Such a pipe soundproofing material cannot be temporarily fixed, and after being wound around the pipe circumference,
There was no method other than gradually attaching the protrusion of the sound insulation layer. Since such a protruding portion is difficult to be adhered and fixed straight in the vertical direction of the pipe soundproofing material, a gap is formed between the pipe soundproofing material and the pipe, and the sound insulation layer of the protruding portion is also wrinkled. The pipe soundproof structure manufactured in this way cannot sufficiently exhibit sound absorption and sound insulation functions. As a result, as shown in Table 1, the noise level of such a pipe soundproof structure was deteriorated by 3 dB (A).

Although the pipe soundproofing material of Comparative Example 3 can quickly release the release paper, it cannot be temporarily fixed. In this respect, the attachment work was troublesome, and the workability was worse than that of the soundproofing material provided with the entire surface adhesive layer. Workers also emphasized the difficulty of winding.

[0066]

As described above, according to the pipe soundproofing material of the present invention, it is possible to reduce the work time required for the installation of the pipe soundproofing material to about half of that of the prior art without obstructing the noise prevention function. In particular, in the method for manufacturing a soundproof pipe structure according to the present invention, a more complete soundproofing work can be performed without giving an uncomfortable feeling to an operator in each step of the work. In addition, if the predetermined curved layer according to the present invention is used on the outer periphery of the pipe soundproofing material, it is possible to shield even the state where toluene and the like volatilizing from the adhesive layer cannot be detected. Since toluene is the most easily vaporized substance in the air in the composition of the pipe soundproofing material, it is considered that the predetermined curved layer according to the present invention can also prevent the volatilization of chemical substances such as other plasticizers.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view of a pipe soundproofing material according to an example of the present invention. FIG. 1B is a cross-sectional view of a pipe soundproof structure according to an example of the present invention.

FIG. 2A is a cross-sectional view of a pipe soundproofing material according to another example of the present invention. FIG. 2B is a cross-sectional view of a pipe soundproof structure according to another example of the present invention.

FIG. 3 (a) is a cross-sectional view of a pipe soundproofing material according to still another example of the present invention. FIG. 3B is a cross-sectional view of a pipe soundproof structure according to still another example of the present invention.

FIG. 4 (a) is a cross-sectional view of a pipe soundproofing material according to still another example of the present invention. FIG. 4B is a cross-sectional view of a pipe soundproof structure according to still another example of the present invention.

FIG. 5 is a cross-sectional view of a test room used to measure noise levels.

FIG. 6 is a perspective view of a toluene detection device.

[Explanation of symbols]

1, 13, 26, 40 Piping soundproofing material 1a, 13a, 26a, 40a Winding start portion 1b, 13b, 26b, 40b Winding end portion 2, 15, 28, 41 Sound insulation layer 3, 16, 29, 43 Sound absorption layer 4, 5, 17, 18, 19, 30, 31, 33, 34,
44, 45 Adhesive layer 6, 8, 20, 22, 35, 37, 46, 48 Release layer 7, 21, 47 Non-adhesive part 9, 23, 38, 49 Piping soundproofing structure 10, 24, 39, 50 Piping 11 , 25, 51 boundary 12 joint tape with adhesive layer 32 split cloth 36 cutting part 52 toilet 53 second floor 54 measurement room 55 test channel 56 microphone 57 partition 58 first floor 59, 63 wall 60 analysis room 61 sound level meter 62 frequency Analyzer 64, 67 Piping 65 Gas detection device 66 Piping soundproofing material 68 Insulation material 69 Constant temperature water tank 70 Temperature control / stirring device 71 Pump

Claims (9)

[Claims] 1. A pipe soundproofing material having an adhesive layer, a sound absorbing layer, and a sound insulation layer, and the noise generated from the pipe can be reduced by attaching the pipe soundproofing material to the outer periphery of the pipe. A pipe soundproofing material, wherein the pipe soundproofing material includes a curved layer, and the curved layer includes:
A pipe soundproofing material, wherein an inner surface of the pipe soundproofing material is curved along the pipe. 2. The curved layer has at least one form of a curved sheet, film, thin plate, and foil, and the curved layer is disposed on the outermost side of the pipe soundproofing material. The pipe soundproofing material according to claim 1, characterized in that: 3. The pipe soundproofing material includes an adhesive layer, a sound absorbing layer, a sound insulating layer, and a curved layer in order from the inner surface side,
When the pipe soundproofing material is viewed in cross section, the pipe soundproofing material has, at one or both ends, a protruding portion that protrudes longer than the sound absorbing layer, and the protruding portion is an adhesive layer, a sound insulating layer. A layer and a curved layer, wherein the adhesive layer is disposed on the innermost side of the protrusion, and when the pipe soundproofing material is attached to the outer periphery of the pipe, the protrusion serves as an overlap margin. The pipe soundproofing material according to claim 1 or 2, wherein: 4. A pipe soundproof structure comprising a pipe and a pipe soundproofing material, wherein the pipe soundproofing material includes an adhesive layer, a sound absorbing layer, and a sound insulation layer, and the pipe soundproofing material is provided on an outer periphery of the pipe. In manufacturing a pipe soundproofing structure that is worn and in which noise generated from the pipes is reduced, (1) preparing a pipe soundproofing material according to any one of claims 1 to 3; When the pipe soundproofing material is viewed in cross section, the inner surface of one end of the pipe soundproofing material is bonded to a predetermined position along the flow path direction on the outer surface of the pipe, and (3) bonding to the pipe. The inner surface of the pipe soundproofing material, when viewed in a cross-section of the pipe soundproofing material while the inner surface of the pipe soundproofing material is in close contact with the outer surface of the pipe, the inner surface of the other end of the pipe soundproofing material, the outer surface of the pipe. And bonding to a predetermined position on one of the outer surfaces of the one end. Sign
Manufacturing method of pipe soundproofing structure. 5. A pipe soundproofing material having an adhesive layer, a sound absorbing layer, and a sound insulation layer, wherein the pipe soundproofing material is attached to an outer periphery of the pipe, so that noise generated from the pipe can be reduced. A soundproofing material, wherein the pipe soundproofing material includes one or both of a curved sound absorbing layer and a curved sound insulating layer, wherein the sound absorbing layer or the sound insulating layer is a pipe soundproofing material. A pipe soundproofing material, wherein an inner surface is curved along the pipe. 6. A pipe soundproofing material provided with an adhesive layer, a sound absorbing layer, and a sound insulation layer, wherein the pipe soundproofing material is attached to an outer periphery of the pipe to reduce noise generated from the pipe. A soundproofing material, wherein the pressure-sensitive adhesive layer, when viewed in a cross section of the pipe soundproofing material,
On the innermost side of one end of the pipe soundproofing material, it is arranged in a band shape, and when viewed in a cross section of the pipe soundproofing material, on the innermost side of the other end of the pipe soundproofing material, A soundproofing material for piping, which is arranged in a belt shape. 7. The pipe soundproofing material includes a curved layer,
The pipe soundproofing material according to claim 6, wherein the curved layer curves an inner surface of the pipe soundproofing material along the pipe. 8. The pipe soundproofing material includes one or both of a curved sound absorbing layer and a curved soundproofing layer, wherein the sound absorbing layer or the soundproofing layer is an inner surface of the pipe soundproofing material. 7. The pipe soundproofing material according to claim 6, wherein the pipe is curved along the pipe. 9. A pipe soundproof structure including a pipe soundproofing material and a pipe, wherein the pipe soundproofing material includes a sound absorbing layer, a sound insulating layer, and an adhesive layer, and the pipe soundproofing material is provided on an outer periphery of the pipe. In manufacturing a pipe soundproofing structure that is worn and in which noise generated from the pipes is reduced, (1) preparing a pipe soundproofing material according to any one of claims 6 to 8; When the pipe soundproofing material is viewed in cross section, the inner surface of one end of the pipe soundproofing material is bonded to a predetermined position along the flow path direction on the outer surface of the pipe, and (3) bonding to the pipe. The inner surface of the pipe soundproofing material, when viewed in a cross-section of the pipe soundproofing material while the inner surface of the pipe soundproofing material is in close contact with the outer surface of the pipe, the inner surface of the other end of the pipe soundproofing material, the outer surface of the pipe. And bonding to a predetermined position on one of the outer surfaces of the one end. Sign
Manufacturing method of pipe soundproofing structure.