JP2001132218A - Soundproof hot-water heating floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof hot-water heating floor having high heating efficiency and high soundproof performance and excellent walking feeling. SOLUTION: The flexural rigidity of a woody board 1 in the heating floor in which the woody board 1, a heat sink 2, a hot-water mat 3 and a sound- insulating material layer 4 are laminated in the order is set in 5N.m2 or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a soundproof hot water heating floor.

[0002]

2. Description of the Related Art Polyolefin resin foams are generally excellent in flexibility and heat insulation, and have been conventionally used as interior materials such as building materials, vehicle ceilings, doors and instrument panels. Particularly, in recent years, with the increase in demand for floor heating, resin foams have been subjected to groove processing and are increasingly used as hot water mats through hot water supply pipes.

[0003] These hot water mats are given a flooring finish, a cork tile finish, a tatami mat finish, a carpet finish, etc. on the surface thereof, laid on a base plywood stretched on a joist, and used as a hot water heating floor. .

[0004] Among them, when a soundproof hot water heating floor finished with a flooring floor is used for an apartment house, a noise problem is caused downstairs, and it is necessary to impart soundproof performance to the floor. In order to effectively impart soundproofing performance, the warm water mat is usually used by attaching a sound insulating material to a lower portion thereof.

FIG. 3 is an explanatory view showing an example of a conventional soundproof hot water heating floor, wherein a is a polyethylene resin foam,
b is a piping groove formed in the polyethylene resin foam a, c is a heat-radiating (hot water supply) pipe made of crosslinked low-density polyethylene piped in the groove b, d is a small joist, and e is a polyethylene-based pipe. Heat sink made of aluminum foil stuck on the entire surface of resin foam a, flooring floor, f
Denotes a nonwoven fabric, h denotes a base plywood, and i denotes a joist (see Japanese Patent Application Laid-Open No. 8-327707, column of prior art). In addition, the radiator plate e is laid and adhered to increase heat conductivity,
The nonwoven fabric g is intended to block the impact sound from the flooring f.

In order to obtain a high sound insulation effect, the above-mentioned soundproof hot water heating floor needs to have a sufficient thickness of the nonwoven fabric g layer, so that the sink against load becomes large,
A new problem has arisen when walking on the upper surface of the flooring material, which causes a feeling of discomfort called the “sickness phenomenon”. Furthermore, since a normal foam is used as the polyethylene resin foam a, there is a problem that the uncomfortable feeling during walking is further increased, and furthermore, there is also a transmission of sound from the small joist d and heat efficiency is insufficient. Met.

Therefore, Japanese Patent Application Laid-Open No. 8-327707 proposes a soundproof hot-water heating floor in which a sound insulation layer (nonwoven fabric) is provided between a mat body provided with pipes and a radiator plate.

[0008]

However, in this configuration, the thickness of the required non-woven fabric layer is increased by providing the non-woven fabric between the hot water mat body and the heat radiating plate, which leads to a decrease in thermal efficiency and a deterioration in walking sensation. Was.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a soundproof hot-water heating floor having high heating efficiency and high soundproofing performance, and having a good walking feeling.

[0010]

According to a first aspect of the present invention, there is provided a soundproofing hot water heating floor (hereinafter referred to as "the present invention") in which a wooden board, a heat sink, a hot water mat, and a sound insulating material layer are laminated in this order. The bending rigidity of the wooden board is 5 N · m ² or less.

The bending rigidity of the wooden board used in the present invention is as follows.
If it is too loud, the sound generated when the floor is impacted
If you try to get the required soundproofing performance,
Need to be thicker, and when doing so,
Feeling fluffy when walking on the floor surface (so-called “sickness
Elephant ”) and the walking feeling is reduced.^Twoless than
Limited. If the bending rigidity of the wooden board is too small,
The feeling of performance is reduced, and the hot water supply pipes are
0.5-3N
・ M ^TwoIs preferred.

The bending stiffness is determined by the following method. Cut the wood board to 50mm width and 150mm length,
A three-point bending test in which the distance between fulcrums (spans) in the length direction is supported at 100 mm and a constant displacement is applied at a bending speed of 6 mm in the middle of the fulcrum, the following general formula (1) Ask by EI = PL ³ / 48W (1) (where, EI: bending stiffness (N · m ² ), P: load (N), L: span interval (0.1 m), W: displacement (0.
01m)

As the woody board having a bending rigidity of 5 N · m ² or less, a single plate (preferably 2 mm or less in thickness) made of a thin plate made of a material having relatively low bending rigidity such as hardwood or a plurality of these laminated boards is used. Plywood or plywood obtained by subjecting these veneers or plywood to groove processing in the thickness direction may be used.
Above all, in order to prevent bending and warping due to the orientation of the fibers of the wooden board, plywood in which veneers having different fiber directions are laminated is preferable.

When the above groove processing is performed, the depth of the groove is
If it is too shallow, a material with low flexural rigidity may not be obtained, and if it is too deep, the strength and durability of the obtained wooden board will be reduced, and the appearance is also unfavorable. It is preferable that 2 mm or more remain up to the surface of the wooden board.

The width of the groove is not particularly limited, but if it is too narrow, a wooden board having a low flexural rigidity may not be obtained, and if it is too wide, strength and durability are reduced. 0.5-1.
5 mm is preferred.

Further, the pitch between the grooves is not particularly limited. However, if the pitch is too narrow, the strength and durability are reduced, and the appearance is not preferable. In some cases, the distance between the centers of adjacent grooves is preferably 5 to 20 mm, and more preferably 7 to 15 mm.

The direction of the groove is not particularly limited as long as it is substantially parallel to the surface of the wooden board.

The radiator plate used in the present invention is not particularly limited as long as it has high heat transfer performance. For example, aluminum and its alloys, iron and steel materials, copper and its alloys, and the like are used. Is used as a tape.

The sound insulating material layer used in the present invention is provided to prevent the sound generated on the floor from being transmitted to the downstairs when the heating floor is used on the floor, and is inadequate when directly attached to concrete. It plays a role of a land adjustment layer, and foams such as polyurethane-based resin foam, polyethylene-based resin foam, polypropylene-based resin foam, and polystyrene-based resin foam; non-woven fabric; Among them, polyurethane resin foams and nonwoven fabrics have the highest soundproofing effect and are preferably used. In addition, a closed cell foam such as a crosslinked polyolefin foam is preferably used because it has an effect as a water blocking layer in addition to improving the adhesion to the floor base material.

The hot water mat used in the present invention circulates hot water in the hot water mat body, and heats the heated water using the heat. The material used for the hot water mat is not particularly limited, but it is necessary to have a thickness enough to circulate the hot water, and it occupies a considerable proportion of the total thickness of the soundproof hot water heating floor. High soundproofing performance is required for the mat body itself.

Therefore, a hot water mat in which a hot water supply pipe is laid in a hard resin foam as described in claim 2 easily satisfies both the heating performance and the soundproof performance. Can be As the hot water supply pipe, any conventionally known pipe can be used, and a crosslinked polyethylene resin pipe is generally used.

If the rigid resin foam has too small a flexural modulus, the flexibility of the foam is too high and the elastic modulus in the compression direction is also insufficient.
"Sea sickness phenomenon" occurs, and walking feeling is extremely poor. On the other hand, if the flexural modulus is too large, the flexibility and vibration damping properties of the entire floor heating panel structure including the floor material are reduced, and a sufficient soundproof effect is obtained even when the sound insulation layer is attached to the lower surface of the rigid foam. Since it cannot be obtained, it is necessary to attach a sound insulating material between the hard plate and the heat sink in order to provide sound insulation performance. In this case, the sound insulation layer is laminated on the upper surface of the hot water mat, so that the heating efficiency is increased. Becomes very bad. Therefore, the bending elastic modulus is preferably from 5 to 30 MPa, more preferably from 10 to 25 MPa.

The bending elastic modulus is measured according to JIS K
12m at 23 ° C and 50% RH
m, a foam with a thickness of 192 mm,
The midpoint is lowered from the upper part at a speed of 6 mm / min, and is obtained from a displacement-stress curve at that time.

Further, as described in claim 3, the hard resin foam is a continuous foam layer made of a thermoplastic resin, and a high foam body made of a thermoplastic resin arranged on at least one surface of the continuous foam layer. And a low-foaming thin film made of a thermoplastic resin that covers the outer surface of the high-foaming material. When the plurality of high-foaming materials are heat-sealed to each other via the low-foaming thin film, It is preferable because it satisfies the performance and walking sensation. Above all, the above-mentioned continuous foamed layer, high foamed body and low foamed thin film are foamable resin comprising: 1) non-crosslinked polyethylene resin 2) non-crosslinked polypropylene resin 3) crosslinkable silane-modified polypropylene resin 4) foaming agent It is preferable that the composition is obtained by foaming, because it not only satisfies the soundproofing performance and walking feeling but also enhances the surface smoothness.

The method for producing the above-mentioned hard resin foam is not particularly limited. For example, the above-mentioned foamable resin composition is foamed in a predetermined container, and the outer surface except one side is made of a thermoplastic resin. Producing a high foam covered with a low foaming thin film, heat-sealing this through the low foaming thin film,
The foamed resin composition may be extruded into a softened sheet-shaped foamable thermoplastic resin by extrusion molding, and the granules to be molded may be laminated to a continuous foamed sheet layer made of a thermoplastic resin separately manufactured. Using a shaping roll in which concave portions corresponding to the shape of the body are arranged in a plane, a sheet-like body in which the above-mentioned granular bodies are integrally connected via a low-foaming thin film made of a foamable resin composition is obtained. It is preferable to heat and foam the foaming agent in the foamable resin composition at a temperature equal to or higher than the decomposition temperature of the foaming agent because a foam satisfying the soundproofing performance and walking feeling can be obtained.

In order to improve the thickness accuracy and weight accuracy of the finally obtained hard resin foam, to impart high surface smoothness, and to make the expansion ratio uniform, the above-mentioned granular material must have a planar shape. Are required to be arranged substantially uniformly. The mode of arranging the particles substantially uniformly in a plane is not particularly limited, and the particles may be arranged in a lattice shape.However, when the particles are arranged in a staggered manner, the individual particles foam. The high foam obtained as a result has a hexagonal column shape, and adjacent high foams are thermally fused to each other via a low foam thin film to form a pseudo honeycomb structure. Therefore, the surface smoothness of the obtained foam is enhanced, and the compressive strength is improved. Therefore, the granules are preferably arranged in a staggered manner.

It is not necessary to use the same foamable resin composition as the foamable resin composition used for the above-mentioned granules and the foamable resin composition used for the low foamed thin film. From the viewpoint, it is preferable to use the same type of composition, and in particular, the foamable resin composition used for the granular material and the low-foaming thin film is preferably both a non-crosslinked polyethylene resin, a noncrosslinked polypropylene resin, and a crosslinkable silane-modified polypropylene. It preferably comprises a resin and a foaming agent.

The non-crosslinked polyethylene resin is not particularly limited, and ordinary high-density polyethylene, low-density polyethylene and ultra-low-density polyethylene are used, but high-density polyethylene is preferable in order not to impair walking feeling. . If the MI value of the non-crosslinked polyethylene resin is too low, it is difficult to produce a rigid foam by extrusion molding,
If it is too high, the heat resistance of the obtained rigid foam tends to be insufficient, so 0.5 to 30 g / 10 min is preferable.

The non-crosslinked polypropylene resin is not particularly limited, and ordinary homopolypropylene is used. If the value of MI of the non-crosslinked polypropylene resin is too low, the heat resistance of the obtained rigid foam tends to be insufficient. Therefore, the MI value is preferably 0.5 to 30 g / 10 minutes.

The amounts of the non-crosslinked polyethylene resin and the non-crosslinked polypropylene resin are not particularly limited. However, in order to achieve both surface smoothness of the obtained foam and prevention of sinking during walking. The ratio of the non-crosslinked polyethylene resin to the non-crosslinked polypropylene resin is 2: 8 by weight.
~ 8: 2 is preferred.

The thermoplastic resin composition used for the foamable thermoplastic resin granules and the thermoplastic resin composition used for the foamable thermoplastic resin thin film are preferably crosslinked. This is because cross-linking can prevent foam breakage during foaming, increase the foaming ratio, and reduce the weight of the floor finish. The crosslinking method is not particularly limited, for example, after melt-kneading a thermoplastic resin composition containing a crosslinkable silane-modified resin, a method of crosslinking by performing a water treatment,
After melt-kneading a peroxide in a thermoplastic resin composition at a temperature lower than the decomposition temperature of the peroxide, a method of crosslinking by heating to a temperature equal to or higher than the decomposition temperature of the peroxide, a method of cross-linking by irradiation with radiation, and the like. No. However, a cross-linking method using a thermoplastic resin composition containing a cross-linkable silane-modified resin, in particular, a cross-linkable silane-modified polypropylene-based resin, is preferable to obtain a high cross-linking resin and a low (no) cross-linking resin described later.

It is preferred that the non-crosslinked polyethylene resin and non-crosslinked polypropylene resin and the crosslinkable silane-modified polypropylene resin have almost no compatibility with each other. In this case, the non-crosslinked polyethylene-based resin and the non-crosslinked polypropylene-based resin easily flow during foaming, so that the surface smoothness of the obtained thermoplastic resin foam is enhanced.

As the difference in the melt index (MI) between the non-crosslinked polyethylene resin and non-crosslinked polypropylene resin and the crosslinkable silane-modified polypropylene resin increases, the high cross-linkability obtained by crosslinking the silane-modified polypropylene resin Since the resin and the non-crosslinked polyethylene resin and the non-crosslinked polypropylene resin are dispersed very coarsely, the expansion ratio of the obtained hard resin foam decreases, and when the resin becomes smaller, the crosslinkable silane-modified polypropylene resin is crosslinked. The resulting highly crosslinked resin has high compatibility with the non-crosslinked polyethylene resin and the non-crosslinked polypropylene resin, and the resulting hard resin foam may have a reduced surface smoothness. The difference is preferably 5 to 13 g / 10 minutes, and 7 to 11 g / 10 minutes.
Minutes are more preferred. Note that MI in this specification is J
It is a value measured according to IS K7210.

If the amount of the crosslinkable silane-modified polypropylene-based resin is too small, the cells will break, and uniform foamed cells will not be obtained. If the amount is too large, crosslinking will proceed excessively and the resulting hard resin foam will not be obtained. Insufficient foam expansion ratio,
Since the problem of poor moldability occurs, the amount is preferably 1 to 150 parts by weight based on 100 parts by weight of the total amount of the non-crosslinked polyethylene resin and the non-crosslinked polypropylene resin.

The method for producing the crosslinkable silane-modified polypropylene-based resin is not particularly limited. For example, R ¹ SiR ² Y ₂ (where R ¹ is an olefinically unsaturated monovalent A hydrocarbon group or a hydrocarbonoxy group, each Y is a hydrolyzable organic functional group, and R ² is a group R ¹ or a group Y). To obtain a crosslinkable silane-modified polypropylene-based resin.

The crosslinking method of the crosslinkable silane-modified polypropylene-based resin is, for example, if the above-mentioned Y is a methoxy group, it is hydrolyzed into a hydroxyl group by contact with water, and a hydroxyl group between molecules reacts to form a hydroxyl group. Forming an O-Si bond,
The silane graft polymers are crosslinked. Examples of such a water treatment method include a method of immersion in water and a method of exposing to water vapor. When the treatment is performed at 100 ° C. or more, the treatment is performed under pressure. If the temperature at this time is too high, a problem that the resin is melted occurs, and if it is too low, the crosslinking reaction speed is reduced. Further, for the purpose of promoting such silane crosslinking, dibutyltin diacetate, dibutyltin laurate, dioctyltin dilaurate, tin octoate, lead naphthenate, zinc cabrate, zinc stearate and the like can be mentioned. Such a silane crosslinking catalyst is
Usually, 0.01 to 1 to 100 parts by weight of the whole resin component.
Used in parts by weight.

If the degree of cross-linking of the resin obtained by the method of cross-linking the cross-linkable silane-modified polypropylene resin is too low, heat resistance and strength may be too low, and a foam suitable as a floor material may not be obtained. The amount is preferably from 3 to 45%, more preferably from 10 to 35%, since the crosslinking is excessive and a foam having a high expansion ratio cannot be obtained.

In the present specification, the degree of crosslinking refers to the percentage by weight of the residue weight after immersing the crosslinked resin component in xylene at 120 ° C. for 24 hours with respect to the weight of the crosslinked resin component before immersion in xylene.

As the foaming agent contained in the foamable resin composition, a pyrolytic foaming agent is preferably used.

The pyrolytic foaming agent is not particularly limited as long as it has a decomposition temperature higher than the melting temperature of the resin to be used. For example, sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, azide compound, Inorganic thermal decomposition type foaming agents such as sodium borohydride; azodicarbonamide, azobisformamide, azobisisobutyronitrile, barium azodicarboxylate, diazoaminobenzene, N, N'-dinitrosopentamethylenetetramine, P -Toluenesulfonyl hydrazide, P, P
'-Oxybisbenzenesulfonylhydrazide, trihydrazinotriazine and the like. When a polyolefin resin is used as the resin, azodicarbonate which is easy to adjust the decomposition temperature and decomposition rate, generates a large amount of gas, and is excellent in hygiene Amides are preferred.

If the amount of the thermal decomposition type foaming agent is too large, the foam breaks and uniform cells are not formed. On the other hand, if the amount is too small, the foaming may not be sufficiently performed. The amount is preferably 1 to 25 parts by weight based on 100 parts by weight of the entire resin component.

(Function) In the heating floor of the present invention, the wooden board, the heat sink, the hot water mat, and the sound insulation material layer are laminated in this order, and the bending rigidity of the wooden board is reduced. It has moderate flexibility, high soundproofing performance, and good heating efficiency of flooring. Furthermore, since the above-mentioned performance can be satisfied even if the sound insulating material layer is thin, the amount of sinking during walking is small, and the walking feeling is good, which is excellent.

In this case, as in the second aspect of the present invention, the hot water mat has a hard resin foam in which a hot water supply pipe is piped, and the rigid resin foam has a flexural modulus of 5 to 5. By setting the pressure to 30 MPa, the rigid foam has appropriate flexibility, and thus has high soundproofing performance. Furthermore, since there is no problem that the foam is too soft, the amount of sinking during walking is small, and the walking feeling is good.

Further, as in the third aspect of the invention, a plurality of hard resin foams used for the hot water mat are arranged on at least one surface of a continuous foam layer made of a thermoplastic resin and at least one surface of the continuous foam layer. A high-foamed body made of a plastic resin and a low-foamed thin film made of a thermoplastic resin covering the outer surface of the high-foamed body, wherein the plurality of high-foamed bodies are thermally fused to each other via the low-foamed thin film. Because of this structure, not only the soundproofing performance of the foam is excellent, but also the rigidity of the entire layer can be imparted, and the walking feeling is further improved.

[0045]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of a rigid foam layer of the soundproof hot water heating floor according to claim 1 cited in claim 2 or 3. As shown in FIG. 1, in the soundproof hot water heating floor of the present invention, a wooden board 1, a heat sink 2, and a hot water mat 3 are laminated in this order from the front side, and a sound insulating material layer 4 is provided on the back surface of the hot water mat 3. It is laminated. A concave groove 11 is provided on the lower surface side of the wooden board 1. The hot water mat 3 has a hard resin foam 31 and a hot water supply pipe 33 in a concave groove 32 provided in the hard resin foam 31. It has been inserted.

FIG. 2 is a schematic vertical sectional view showing an example of the hard resin foam 31 according to the third aspect. As shown in FIG. 2, the hard resin foam 31 includes a plurality of high foams 31 a made of a thermoplastic resin having a high expansion ratio arranged on at least one surface of a continuous foam layer 31 c made of a thermoplastic resin. The outer surface of the high foam 31a is covered with a low foam thin film 31b made of a thermoplastic resin having a low expansion ratio. Further, the adjacent high foamed body 31a is formed of the low foamed thin film 3
1b is thermally fused.

[0047]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments. (Example 1) High density polyethylene (manufactured by Mitsubishi Chemical Corporation; product number “HY340”, density 0.952 g / cm ³ , MI =
25 parts by weight of 1.5 g / 10 min, melting point 133 ° C.), high-density polyethylene (manufactured by Mitsubishi Chemical Corporation; product number “HJ381P”,
Density 0.951 g / cm ³ , MI = 9.0 g / 10 min,
25 parts by weight, melting point 132 ° C., polypropylene (manufactured by Mitsubishi Chemical Corporation; product number “MA3”, density 0.900 g / cm ³ , M
I = 11 g / 10 min, melting point: 151 ° C.) 29 parts by weight, cross-linkable silane-modified polypropylene resin (manufactured by Mitsubishi Chemical Corporation; part number “XPM800HM”) 21 parts by weight, silane cross-linking catalyst (manufactured by Mitsubishi Chemical Corporation; part number “PZ-”) 10S ") 1 part by weight, azodicarbonamide (manufactured by Otsuka Chemical Co., Ltd .; product number" SO-2 "
0 ") 9 parts by weight of the mixture were placed in a twin-screw extruder (diameter 44 mm)
At 180 ° C., and a softened sheet-like foamable thermoplastic resin was extruded with a T-die having a surface length of 300 mm and a lip of 1.5 mm.

Further, the foaming thermoplastic resin sheet was cooled while being shaped using a shaping roll having a diameter of 250 mm and a surface length of 300 mm in which concave portions having a depth of 5 mm and a diameter of 4 mm were arranged in a staggered manner. In addition, 9
It was immersed in hot water at 8 ° C. for 2 hours and then dried to obtain a foamable thermoplastic resin sheet (crosslinking degree: 15%). In the foamable thermoplastic resin sheet obtained as described above, a granular material made of the expandable thermoplastic resin is formed on a surface corresponding to the concave portion of the forming roll, and the granular material is The ends were connected by a thin film of a foamable thermoplastic resin having a thickness of 0.4 mm to form a foamable thermoplastic resin sheet as a whole.

The obtained foamable thermoplastic resin sheet was supplied to an endless belt having a heating device in a state of being placed on a polytetrafluoroethylene sheet, and then cooled.
A hard resin foam 31 was obtained. The feed rate of the foamable thermoplastic resin sheet was 0.5 mm / min, the length of the heating device was 5 mm, and the temperature was 210 ° C. Also, the cooling device 1
Sample No. 6 had a length of 5 mm and a temperature of 30 ° C. The thickness of the obtained rigid foam 3 is 12 mm, and a high foam 31a formed by foaming the granular material is formed on one surface of the continuous foam layer 31c. The high foam 31a is a low foam thin film 31b. Were thermally fused to each other.

The obtained hard resin foam 31 (expansion ratio 2
0) is cut into 310 × 910 mm, and a groove 32 (width, depth 10 mm) is formed on the side of the high-foamed body 31 a at a pitch of 100 mm by a router processing method, and the hot water supply pipe 33 is formed in the groove 32. (A crosslinked polyethylene resin tube, manufactured by Inoac Corporation, diameter 10 mm, thickness 1.5 mm) was inserted to obtain a hot water mat 3. Further, on the upper surface of the hot water mat 3, as a heat radiating plate 2, an aluminum tape (a burning aluminum tape for a modular panel manufactured by Inoac Corporation, a template DMT)
A470-25), and a wooden board 1 (hardwood veneer 7ply laminated 7 ply) on the upper surface, a groove 11 having a depth of 6 mm and a width of 1 mm is formed on one surface of a plywood having a thickness of 9 mm and a width of 15 mm.
Those provided at intervals. Flexural rigidity: ^2.5 N · m ² ) is attached so that the groove 11 is on the heat radiating plate 2 side, and further, on the lower surface of the hard resin foam 31, as a sound insulating material layer 4, a polyurethane resin foam (Bridgestone Corporation) Made, expansion ratio 50
2 times the thickness of 3 mm) to produce the soundproof hot-water heating floor shown in FIG.

(Example 2) As a sound insulating material layer, a non-woven fabric made of polyester fiber (thickness: 3 denier, basis weight: 100 g)
/ M ² ), except that a soundproof hot water heating floor was produced in the same manner as in Example 1.

Example 3 As a sound insulating material layer, a soft foam (manufactured by Dow Chemical Co., Ltd., trade name: Styrofoam RB-G)
K ", a thickness of 12 mm and a density of 0.033 g / cm ³ ), except that a soundproof hot water heating floor was produced in the same manner as in Example 1.

Example 4 The thickness of the wooden board 1 was 3 mm.
A soundproof hot-water heating floor was produced in the same manner as in Example 1 except that plywood (without groove processing, bending rigidity of 4.4 N · m ² ) was used.

(Comparative Example 1) A 9 mm thick plywood (4.5 mm deep, 1 mm wide groove 11) was used as a wooden board.
Provided at mm intervals. Flexural rigidity: 12 N · m ² )
A soundproof hot-water heating floor was produced in the same manner as in Example 1 except for using.

(Comparative Example 2) A soundproof hot water heating floor was produced in the same manner as in Example 1 except that a plywood having a thickness of 4 mm (no groove processing, flexural rigidity of 10 N · m ² ) was used as a wooden board. .

(Comparative Example 3) A soundproof hot water heating floor was manufactured in the same manner as in Example 1 except that the sound insulating material layer was not provided.

(Comparative Example 4) Polyurethane resin foam as a sound insulating material layer (manufactured by Bridgestone Co.,
A soundproof hot-water heating floor was made in the same manner as in Example 1 except that a thickness of 3 mm) was provided between the heat sink and the hot water mat.

(Comparative Example 5) A plywood having a thickness of 4 mm (without groove processing, flexural rigidity of 10 N · m ² ) was used as a wooden board, and a polyurethane resin foam (manufactured by Bridgestone Corporation) was used as a sound insulating material layer. Except for using a foaming ratio of 50 times and a thickness of 6 mm), a soundproof hot-water heating floor was produced in the same manner as in Example 1.

Evaluation of soundproof hot water heating floor

(Heating Efficiency) Hot water of 80 ° C. was flowed through the hot water supply pipe of the obtained soundproof hot water heating floor, and the heat efficiency (top of the total heat amount) was measured using a heat flow meter (manufactured by Eiko Seiki Co., Ltd.). The ratio of the amount of heat transmitted to the sample was measured.

(Soundproofing performance) The lightweight floor impact level LL was measured according to JIS A1418.

(Feeling of walking) A steel ball having a diameter of 50 mm is
The amount of submergence when pressed with a force of 784 N was measured. In addition, 1.4 to 2.6 mm is considered to be good. If it is 4 mm or more, fluffy discomfort occurs when walking, and if it is 0 mm, the sole of the foot becomes painful as if walking on concrete. The above results are shown together with the bending rigidity of the wooden board 1 in Table 1.

[0063]

[Table 1]

[0064]

According to the first aspect of the present invention, the sound-insulating hot-water heating floor has the above-described structure, so that it has both good heating efficiency and sound-proof performance, and also has an excellent walking feeling. .

The soundproofing hot water heating floor according to the second aspect has the above-described structure, so that the soundproofing performance and walking feeling are further improved.

The soundproofing hot water heating floor according to the third aspect has the above-described configuration, so that the heating efficiency and the soundproofing performance are further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of the soundproof hot water heating floor according to claim 1 cited in claim 2 or 3;

FIG. 2 is a schematic vertical sectional view showing an example of the hard resin foam according to the third embodiment.

FIG. 3 is an explanatory diagram showing an example of a conventional soundproof hot water heating floor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wood board 2 Heat sink heat generator 3 Hot water mat 31 Hard resin foam 31a High foam 31b Low foam thin film 31c Continuous foam layer 33 Pipe for hot water supply 4 Sound insulation material layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F24D 3/16 F24D 3/16 A

Claims (3)

[Claims] 1. A soundproof hot-water heating system wherein a wooden board, a heat radiator, a hot water mat, and a sound insulation material layer are laminated in this order, and the bending rigidity of the wooden board is 5 N · m ² or less. floor. 2. The hot water mat according to claim 1, wherein a hot water supply pipe is laid in a hard resin foam, and the flexural modulus of the hard resin foam is 5 to 30 MPa. The described soundproof hot water heating floor. 3. The hot water mat comprises a hard resin foam having a hot water supply pipe provided therein, wherein the hard resin foam comprises a continuous foam layer made of a thermoplastic resin, and at least one surface of the continuous foam layer. A high-foamed body made of a thermoplastic resin and a low-foamed thin film made of a thermoplastic resin covering the outer surface of the high-foamed body, the plurality of high-foamed bodies form the low-foamed thin film with each other. And the above-mentioned continuous foamed layer, high foamed body, and low foamed thin film are: 1) a non-crosslinked polyethylene-based resin 2) a non-crosslinked polypropylene-based resin 3) a crosslinkable silane-modified polypropylene-based resin 4) The soundproof hot water heating floor according to claim 1 or 2, which is obtained by foaming a foamable resin composition comprising: a foaming agent.