JP2000097445A - Sound-proof hot water heating floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance heating efficiency and sound-proof performance by laminating a hard planar body, a heat radiating plate and a hard foamed body sequentially and arranging a hot water supply pipe in the hard foamed body while setting the bending modulus of elasticity thereof within a specified range. SOLUTION: The sound-proof hot water heating floor comprises a hard planar body 1, a heat radiating plate, i.e., a planar heating element 2, and a hard foamed body 3 laminated sequentially. The hard foamed body 3 has bending modulus of elasticity in the range of 50-300 kgf/cm2 and comprises a continuously foamed layer of thermoplastic resin, a plurality of heavily foamed bodies of thermoplastic resin arranged on the continuously foamed layer, and a lightly foamed thin film of thermoplastic resin covering the outer surface of the heavily foamed body. A hot water supply pipe 5 is arranged in the hard foamed body 3. According to the structure, both thermal efficiency and sound-proof performance are enhanced while improving the walking feeling.

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. In particular, in recent years, due to an increase in demand for floor heating, a resin foam is provided with a piping groove, and is often used as a floor heating panel through a hot water supply pipe.

[0003] These floor heating panels are used as soundproof hot water heating floors by applying a flooring finish, a cork tile finish, a tatami finish, a carpet finish or the like to the surface.

[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 provide the soundproof performance, the floor heating panel is usually used by attaching a sound insulating material to a lower portion thereof.

[0005] Fig. 4 is an explanatory view showing an example of a conventional soundproof hot water heating floor, wherein a is a polyethylene foam, b is a pipe groove formed in the polyethylene foam a, and c is a groove b. A heat-radiating pipe made of cross-linked low-density polyethylene (for hot water supply), d is a small joist, and e is a heat-radiating plate made of aluminum foil attached to the entire surface of the polyethylene foam a. It is laid and stuck to raise. f is a flooring floor, g is a nonwoven fabric, and this nonwoven fabric g is intended to block the impact sound from the flooring floor f. Here, h is the base plywood, and i is the joist (see JP-A-8-327707, column of the prior art).

[0006]

In the above floor heating panel, since the non-woven fabric g has a small sound insulating effect, it is necessary to increase the thickness of the non-woven fabric g layer in order to obtain a high sound insulating effect. A new problem arises when walking on the upper surface of the floor material, and the user feels discomfort called the “sickness phenomenon”. Furthermore, since a normal foam is used as the polyethylene foam a, there is a problem that the uncomfortable feeling at the time of walking is further increased, heat is also radiated from the small joist d, and thermal efficiency is insufficient.

The soundproofing performance and uncomfortable feeling when walking can be somewhat eliminated by providing the space between the flooring floor f and the radiator plate e. In this case, however, the heating efficiency is reduced and the soundproof hot water heating is performed. The floor was not satisfactory.

An object of the present invention is to solve the above-mentioned problems and to provide a soundproof hot-water heating floor having high heating efficiency and high soundproofing performance and good walking feeling.

[0009]

According to the first aspect of the present invention, there is provided a soundproof hot water heating floor (hereinafter referred to as "heating floor of the present invention") in which a hard plate, a heat sink, and a hard foam are laminated in this order. A floor material in which a hot water supply pipe is laid in the rigid foam, wherein the rigid foam has a flexural modulus of 50 to 300.
kgf / cm ² .

The hard plate used in the heating floor of the present invention is not particularly limited as long as it does not easily break or damage under the load normally applied to the flooring. Plywood, particle board, high density fiberboard (HD
F), wood materials such as medium-density fiberboard (MDF); thermoplastic resins such as polyethylene, polypropylene, and polyvinyl chloride; thermosetting resins such as polyester and epoxy resin; and laminates of these materials. Plywood; a fiberboard veneer such as HDF or MDF; or a laminate thereof is preferred in terms of properties, processability, texture, and the like.

If necessary, a surface decorative material such as a veneer, a synthetic resin or a synthetic resin foam sheet, decorative paper, a synthetic resin impregnated sheet, etc. is adhered and laminated on the hard plate-like body. It may be added in a tone. In this case, it is preferable to bond and laminate both surfaces of the hard plate to prevent warping. Further, printing, painting, coloring, coating, and the like may be performed in order to impart designability, woody feel, scratch resistance, and the like.

As the radiator plate used for the heating floor of the present invention, aluminum and its alloys, iron and steel materials, copper and its alloys, and the like are used, and are usually used in the form of tape.

When the rigid foam used for the heating floor of the present invention has too small a flexural modulus, the flexibility of the foam is too high and the modulus of elasticity in the compression direction is also insufficient. When walking, a "sickness phenomenon" occurs, and the walking feeling becomes extremely poor. Also, if the flexural modulus is too large, the flexibility of the entire floor heating panel structure including the floor material,
The sound damping property is reduced, and even if the sound insulation layer is attached to the lower part via the hard foam, a sufficient sound insulation effect cannot be obtained. In this case, since the soundproof layer is laminated on the floor heating panel, the heating efficiency is extremely deteriorated. Therefore, the flexural modulus is 50 to 300 kg.
f / cm ² , preferably 100-250 kg
f / cm ² .

The method for measuring the flexural modulus is described in JIS K
12m at 23 ° C and 50% RH
m, a foam having a thickness of 192 mm is supported at a fulcrum distance 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.

The rigid foam has a flexural modulus of 50.
Although it is not particularly limited as long as it is ~ 300 kgf / cm ² ,
As shown in claim 2, a continuous foam layer made of a thermoplastic resin and a high foam made of a thermoplastic resin arranged on at least one surface of the continuous foam layer described in Japanese Patent Application No. 9-43975. Body, and a low-foaming thin film made of a thermoplastic resin covering the outer surface of the high-foaming material, wherein the plurality of high-foaming materials are heat-sealed to each other via the low-foaming thin film. It is preferred that

The resin used for the continuous foamed layer, the high foamed body, and the low foamed thin film constituting the thermoplastic resin foam is not particularly limited as long as it is a foamable thermoplastic resin. Olefin-based resins such as polyethylene and polypropylene or a mixture thereof are preferable because they can enhance the smoothness of the obtained thermoplastic foam, and both the surface smoothness and the prevention of sinking of the obtained floor finishing material during walking can be achieved. For this purpose, high-density polyethylene, homopolypropylene or a mixture containing at least one of them is particularly preferred.

The method for producing the thermoplastic resin foam is not particularly limited. For example, a foamable thermoplastic resin composition containing a foaming agent is foamed in a predetermined container, and one side is removed. A high-foamed body whose outer surface is coated with a low-foaming thin film made of a thermoplastic resin is produced, and this is heat-sealed through the low-foaming thin film to form a continuous foam sheet layer made of a separately produced thermoplastic resin. Lamination may be performed by heat fusion or the like, but the expandable thermoplastic resin particles are arranged in a plane, and the expandable thermoplastic resin particles are integrally connected via an expandable thermoplastic resin thin film. It is preferable to obtain a foamable thermoplastic resin sheet by heating the foamed thermoplastic resin sheet to a temperature equal to or higher than the decomposition temperature of the foaming agent and foaming.

The thermoplastic resin used for the expandable thermoplastic resin granules and the expandable thermoplastic resin thin film constituting the expandable thermoplastic resin sheet may be a resin used for the above thermoplastic resin foam. The same is used.

The thermoplastic resin used for the foamable thermoplastic resin granules and the thermoplastic resin used for the foamable thermoplastic resin thin film do not need to be the same resin. From the viewpoint of the above, it is preferable to use the same type of resin. The thermoplastic resin used for the thermoplastic resin granules and the foamable thermoplastic resin thin film constituting the continuous foam layer is not particularly limited as long as it is a foamable thermoplastic resin. These may be used alone or in combination.

Among the above thermoplastic resins, an olefin resin such as polyethylene and polypropylene or a mixture thereof is preferable since the surface smoothness of the obtained foam can be enhanced. ,
High-density polyethylene, homopolypropylene or a mixture containing at least one of these is particularly preferred.

The thermoplastic resin used for the foamable thermoplastic resin sheet or the like may be cross-linked if necessary. 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 silane crosslinking resin into a thermoplastic resin, performing a water treatment and crosslinking, the peroxide is converted into a thermoplastic resin by the decomposition temperature of the peroxide. After melt-kneading at a low temperature, a method of crosslinking by heating above the decomposition temperature of the peroxide,
A method of cross-linking by irradiating radiation may be used. However, a cross-linking method using a silane cross-linkable resin, especially a silane cross-linkable polypropylene resin, is preferable to obtain a high cross-linked resin and a low (no) cross-linked resin described later.

The thermoplastic resin used for the foamable thermoplastic resin granules is not particularly limited as described above, but may be a foaming agent, a highly crosslinked thermoplastic resin having almost no compatibility with each other, and a low crosslinked or noncrosslinked thermoplastic resin. Preferably, it is a mixture with a thermoplastic resin. In this case, the low-crosslinked or non-crosslinked thermoplastic resin easily flows during foaming,
The surface smoothness of the obtained thermoplastic resin foam is enhanced.

As the thermoplastic resin (before crosslinking) used for the two types of resins having almost no compatibility with each other, two types of the above-mentioned thermoplastic resins [hereinafter referred to as the crosslinking performance of the resin itself. Resins that form a highly crosslinked thermoplastic resin are called "highly crosslinkable resins", and resins that form a low or no crosslinkable thermoplastic resin are called "low (no) crosslinkable resins". Can be.

When the difference in the melt index (MI) between the highly crosslinkable resin and the low (non) crosslinkable resin increases, the high crosslinkable thermoplastic resin obtained by crosslinking and the low crosslinkable or noncrosslinkable thermoplastic resin Is very coarsely dispersed, so that the expansion ratio of the obtained foam is reduced and becomes smaller, and the high crosslinked thermoplastic resin obtained by crosslinking, the compatibility of the low crosslinked or non-crosslinked thermoplastic resin becomes high, and the obtained. Because the surface smoothness of the thermoplastic resin foam may be reduced, the highly crosslinked thermoplastic resin and the low crosslinked or non-crosslinked thermoplastic resin are uniformly and finely dispersed without being compatible with each other,
In order to obtain a thermoplastic resin foam having a high expansion ratio, MI
Is preferably 5 to 13 g / 10 minutes, and 7 to 11 g / 1.
0 minutes is more preferred. Note that MI in the present specification is
It is a value measured according to JIS K7210.

A highly crosslinked thermoplastic resin obtained by crosslinking,
In order to obtain a high-expansion-ratio thermoplastic resin foam in which a low-crosslinking or non-crosslinking thermoplastic resin is uniformly and finely dispersed and has excellent surface smoothness, a highly crosslinkable resin and a low (no) crosslinkable resin are required. Is preferably 2: 8 to 8: 2 by weight.

If the degree of cross-linking of the highly cross-linked thermoplastic resin is too high, the cross-linking is excessive, and the expansion ratio of the obtained thermoplastic resin foam is reduced. Since cells may not be obtained, the ultimate gel fraction, which is an index of the degree of crosslinking, is 5 to 4% of the entire thermoplastic resin.
It is preferably 0% by weight, more preferably 10 to 35% by weight.

If the degree of crosslinking of the low-crosslinking or non-crosslinking thermoplastic resin is too high, crosslinking is excessive, the fluidity of the resulting thermoplastic resin foam is reduced, and the surface smoothness of the thermoplastic resin foam is reduced. Therefore, the gel fraction as an index of the degree of crosslinking is preferably 5% by weight or less, more preferably 3% by weight or less.

The gel fraction in this specification 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.

Examples of a method of preferentially crosslinking a highly crosslinkable resin only or a highly crosslinkable resin over a low (non) crosslinkable resin include, for example, only a highly crosslinkable resin or a more highly crosslinkable resin than a low (no) crosslinkable resin. A method of crosslinking using a crosslinking agent that preferentially crosslinks a resin, in the first step, a highly crosslinkable resin having a crosslinkable functional group is mixed and crosslinked with the same type of crosslinkable resin to form a highly crosslinked thermoplastic resin. After the formation, in a second stage, a method of mixing this with a low (non-) crosslinkable resin may be used.

It should be noted that the highly crosslinked thermoplastic resin and the low crosslinked or non-crosslinked thermoplastic resin can be uniformly and finely dispersed, that the highly crosslinked resin is easily crosslinked preferentially, and that the thermoplastic resin can be easily prepared. From the above, a crosslinkable resin having the same melt index as the highly crosslinkable resin and having a crosslinkable functional group, and the same type of crosslinkable resin as the high crosslinkable resin and the low (no) crosslinkable resin are mixed, Is most preferred.

Examples of the crosslinkable resin having the same melt index as the highly crosslinkable resin, having a crosslinkable functional group, and the same kind as the highly crosslinkable resin include a thermoplastic resin having a reactive functional group and capable of being crosslinked. If it is, there is no particular limitation. Such functional groups include, for example, vinyl groups,
The above-mentioned thermoplastic resin having an unsaturated group such as an allyl group and a propenyl group, a hydroxyl group, a carboxyl group, an epoxy group, an amino group, a silanol group, a silanate group and the like can be mentioned.

Specific examples of the same kind of crosslinkable resin having a crosslinkable functional group as the highly crosslinkable resin include maleic acid-modified polyethylene, maleic acid-modified polypropylene, silane-modified polyethylene, and silane-modified polypropylene. Silane-modified polyethylene and silane-modified polypropylene are more preferred because it is easy to preferentially crosslink highly crosslinkable resin only to highly crosslinkable resin or low (no) crosslinkable resin over crosslinkable resin, and easy to crosslink after mixing. preferable.

If the difference in melt index between the highly crosslinkable resin and the crosslinkable resin having a crosslinkable functional group is too large, only the highly crosslinkable resin or the highly crosslinkable resin is given priority over the low (no) crosslinkable resin. Because it becomes difficult to crosslink,
It is preferably at most 2 g / 10 min, more preferably at most 1 g / 10 min.

As a crosslinkable resin having a crosslinkable functional group,
When using a silane-crosslinkable polypropylene-based resin, if the blending amount of the silane-crosslinkable polypropylene-based resin is too large, crosslinking proceeds excessively, the magnification of the obtained foam becomes insufficient, or the moldability deteriorates. A problem arises. Conversely, if the amount is too small, the cells break and the uniform foamed cells cannot be obtained. Therefore, the blending amount of the silane-crosslinkable polypropylene-based resin is 5 to 55% by weight of the total resin composition, preferably 20
~ 35% by weight.

The method for producing the silane-crosslinkable polypropylene-based resin is not particularly limited. For example, R ¹ SiR ² Y ₂ (where R ¹ is an olefinically unsaturated monovalent carbon A hydrogen 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). A method of reacting to obtain a silane crosslinkable polypropylene resin.

For example, when the above-mentioned Y is a methoxy group, the silane-crosslinkable polypropylene-based resin is hydrolyzed into a hydroxyl group by contact with water, and a hydroxyl group between molecules reacts to form a Si—O. -Si bonds are formed, and 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, there is a problem that the resin is melted, and if the temperature is too low, the crosslinking reaction speed decreases.
0-120 ° C is preferred. 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 silane crosslinking catalysts are usually
0.01 to 100 parts by weight based on the whole resin component
One part by weight is used.

The degree of crosslinking of the polypropylene obtained by the method of crosslinking a silane-crosslinkable polypropylene resin is usually preferably from 3 to 45%. If the degree of cross-linking is less than 3%, the heat resistance and strength are too low, and if it exceeds 45%, the degree of cross-linking becomes excessive, and a high magnification foam cannot be obtained.

Blowing Agent In the present invention, a pyrolytic blowing agent is used as a blowing agent contained in the expandable thermoplastic resin granules and the expandable thermoplastic resin thin film.

The pyrolytic foaming agent is not particularly limited as long as it has a decomposition temperature higher than the melting temperature of the thermoplastic resin used. Examples thereof include sodium bicarbonate, ammonium carbonate, ammonium bicarbonate and azide. Compounds, inorganic pyrolytic blowing agents such as sodium borohydride; azodicarbonamide, azobisformamide, azobisisobutyronitrile, barium azodicarboxylate, diazoaminobenzene, N, N'-dinitrosopentamethylenetetramine , P-toluenesulfonylhydrazide, P, P'-oxybisbenzenesulfonylhydrazide, trihydrazinotriazine, and the like. When a polyolefin-based ethylene resin is used as the thermoplastic resin, the decomposition temperature and decomposition rate can be easily adjusted. A large amount of gas is generated, and Zodicarbonamide is preferred.

If the amount of the above-mentioned pyrolytic foaming agent is too large, foams are broken and uniform cells are not formed. On the contrary, if the amount is too small, foaming may not be sufficiently performed. It is preferable that the content be contained in a proportion of 1 to 25 parts by weight based on 100 parts by weight of the thermoplastic resin.

In the foamable thermoplastic resin sheet, the foamable thermoplastic resin granules are arranged substantially uniformly in a plane.
The foamable thermoplastic resin granules are integrally connected via a foamable thermoplastic resin thin film.

The shape of the foamable thermoplastic resin particles is as follows:
There is no particular limitation, and examples thereof include a hexagon, a columnar shape, a spherical shape, and the like, and a columnar shape is most preferable for uniformly foaming the expandable thermoplastic resin particles.

When the expandable thermoplastic resin particles are cylindrical, the diameter thereof is not particularly limited because it varies depending on the expansion ratio and thickness of the target foam. If it is too low, the column is melted by heating during foaming, easily deformed and one-dimensional foamability cannot be exhibited, and the thickness accuracy and weight accuracy vary greatly.
Also, the surface smoothness is reduced. Therefore, when the expandable thermoplastic resin particles are cylindrical, the diameter is preferably 1 to 30 mm, and particularly preferably 2 to 20 mm.

The method for producing the foamable thermoplastic resin sheet is not particularly limited.
1) The thermoplastic resin and the foaming agent constituting the foamable thermoplastic resin sheet are supplied to an injection molding machine, and are melt-kneaded at a temperature lower than the decomposition temperature of the pyrolytic foaming agent to form the foamable thermoplastic resin granules. A method of injecting the mixture into a mold having a concave portion corresponding to the shape and then cooling the mixture may be mentioned. 2) The thermoplastic resin and the foaming agent constituting the foamable thermoplastic resin sheet are supplied to an extruder and heated. After melt-kneading at a temperature lower than the decomposition temperature of the decomposable foaming agent, the softened sheet-shaped foamable thermoplastic resin has a clearance smaller than the thickness of the sheet-shaped foamable thermoplastic resin, and has at least one outer peripheral surface. After being introduced into a pair of shaping rolls rotating in different directions in which a large number of concave portions are uniformly disposed, a part of a softened sheet-like foamable thermoplastic resin is pressed into the concave portions, and then cooled and released. Is the most preferred method

In the heating floor of the present invention, a damping agent other than a hard foam such as a nonwoven fabric or a damping rubber, and a soundproofing agent may be laminated on the surface of the hard foam. In this case, it is preferable that the flexible foam is laminated as described in claim 3.

The above-mentioned flexible foam is not particularly limited, and examples thereof include flexible foams such as foamed polyethylene, foamed polyurethane, foamed polypropylene, and foamed polystyrene. Of these, foamed polyurethane has the highest soundproofing effect and is preferred. Used for In addition, it is preferable that a closed cell foam such as a crosslinked polyolefin foam is adhered to such a buffer layer in order to improve the adhesion to the floor base material. Such a foam layer is preferably used because it has an effect as a water blocking layer in addition to improving the adhesion.

(Function) The heating floor of the present invention has a hard plate-like shape,
A heat sink and a rigid foam are laminated in this order, and a floor material in which a hot water supply pipe is laid in the rigid foam, wherein the rigid foam has a flexural modulus of 50 to 300 kgf.
/ Cm ² , the rigid foam has appropriate flexibility, so that the floor material has good heating efficiency and 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.

In this case, as in the second aspect of the present invention, the rigid foam comprises a continuous foam layer made of a thermoplastic resin,
A high-foamed body made of a thermoplastic resin disposed on at least one surface of the continuous foam layer, 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 Since the thermoplastic resin foams are thermally fused to each other via the low-foaming thin film, the soundproofing performance and walking feeling are further improved.

Further, when the soft foam is further laminated on the surface of the hard foam side of the soundproof hot water heating floor as in the invention of claim 3, the heating efficiency and the soundproof performance are further improved. Become.

[0050]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the soundproof hot water heating floor of the present invention described in claim 2 cited in claim 3. As shown in FIG. 1, the soundproofing floor covering with soundproofing hot water heating floor heating function of the present invention 1 has a hard plate 1, a flat heating element 2, and a hard resin foam 3 laminated in this order from the surface side. The soft resin foam 4 is laminated on the back surface of the hard resin foam 3. In this case, a groove 6 having a predetermined size is formed in the rigid foam 3, and a hot water supply pipe 5 is inserted therein.

FIG. 2 is a schematic vertical sectional view showing an example of the thermoplastic resin foam used in the present invention. As shown in FIG. 2, the thermoplastic resin foam 3 has a plurality of high foams 3a made of a thermoplastic resin having a high expansion ratio arranged on at least one surface of a continuous foam layer 3c made of a thermoplastic resin. The outer surface of the high foam 3a is covered with a low foam thin film 3b made of a thermoplastic resin having a low expansion ratio.
The adjacent high foam 3a is thermally fused via the low foam thin film 3b.

[0052]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments. (Example 1) As a low (non-) crosslinkable resin, high-density polyethylene (manufactured by Mitsubishi Chemical Corporation; product number "HY340", density 0.
952 g / cm ³ , MI = 1.5 g / 10 min, melting point 13
25 parts by weight, 3 parts by weight, 25 parts by weight of high-density polyethylene (manufactured by Mitsubishi Chemical Corporation; product number "HJ381P", density: 0.951 g / cm ³ , MI = 9.0 g / 10 minutes, melting point: 132 ° C.) as a highly crosslinkable resin , Polypropylene (manufactured by Mitsubishi Chemical Corporation; product number “MA3”, density 0.900 g / cm ³ , MI
= 11 g / 10 min, melting point 151 ° C) 29 parts by weight, silane crosslinkable polypropylene (manufactured by Mitsubishi Chemical Corporation; product number “XPM8
00HM ") 21 parts by weight, 1 part by weight of a silane crosslinking catalyst (manufactured by Mitsubishi Chemical Corporation; product number" PZ-10S "), and azodicarbonamide (manufactured by Otsuka Chemical Co .; product number" SO-20 ") as a pyrolytic foaming agent 9 parts by weight of the mixture was melt-kneaded at 180 ° C. with a twin-screw extruder (diameter: 44 mm), and the surface length was 300 m.
The sheet-like foamable thermoplastic resin in a softened state was extruded by a T die having a m and a lip of 1.5 mm.

Further, the foamable thermoplastic resin sheet having a diameter of 250 mm and a surface length of 300 mm in which concave portions having a height of 5 mm and a diameter of 4 mm are arranged in a zigzag pattern is cooled while being shaped.
Furthermore, the foamable thermoplastic sheet is placed in hot water at 98 ° C.
After immersion for a period of time and drying, a foamable thermoplastic resin sheet (crosslinking degree: 15%) was obtained. In the foamable thermoplastic resin sheet obtained as described above, the foamable thermoplastic resin granules are configured in a portion corresponding to the concave portion of the forming roll, and the foamable thermoplastic resin granules are The ends were connected by a foamable thermoplastic resin thin film 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 a rigid foam 3 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. The cooling device 16 has a length of 5 mm,
The temperature was 30 ° C. The thickness of the obtained rigid foam 3 is 1
2 mm.

The obtained rigid foam 3 (magnification: 20 times)
After cutting into 310 x 910mm, pitch interval 100mm
A groove 6 (width, depth 10 mm) is formed by a router processing method, and a polyethylene pipe 5 (manufactured by INOAC, diameter 1) is formed in the groove.
0 mm and a thickness of 1.5 mm), and an aluminum tape 2 (a burning aluminum tape for a modular panel manufactured by INOAC Co., Ltd .;
5), a plywood 1 having a thickness of 9 mm is adhered on the upper surface, and a soft foam 4 (Bridgestone urethane foam, foaming ratio 50 times, thickness 3)
mm) was affixed to produce the soundproof hot water heating floor shown in FIG.

Example 2 36 parts by weight of a low (non-) crosslinkable resin, high-density polyethylene (manufactured by Mitsubishi Chemical Corporation; product number "HJ381P", density 0.951 g / c) as a highly crosslinkable resin
m ³ , MI = 9.0 g / 10 min, melting point 132 ° C.) 36 parts by weight, polypropylene (manufactured by Mitsubishi Chemical Corporation; product number “MA”
3 ", density 0.900 g / cm ³ , MI = 11 g / 10
7 parts by weight, silane crosslinkable polypropylene (manufactured by Mitsubishi Chemical Corporation; product number "XPM800HM") 21
Except for using parts by weight, a soundproof hot water heating floor was prepared in the same manner as in Example 1.

(Comparative Example 1) A soundproof hot water heating floor was prepared in the same manner as in Example 1 except that the soft foam 4 was disposed between the plywood 1 and the aluminum tape 2 as shown in FIG.

(Comparative Example 2) A soundproof hot water heating floor was prepared in the same manner as in Example 1 except that the product name “STYROFORM RB-GK” manufactured by Dow Chemical Industries, Ltd. was used as the rigid foam 3.

Comparative Example 3 A soundproof hot water heating floor was prepared in the same manner as in Comparative Example 1 except that the soft foam 4 was disposed between the plywood 1 and the aluminum tape 2 as shown in FIG.

(Comparative Example 4) Instead of the rigid foam 3, a crosslinked polyethylene foam made by Toray (magnification: 20 times, thickness: 4 m)
m was laminated in the same manner as in Example 1 except that m was used.

The rigid foam 3 obtained from the elastic modulus of the foam and the crosslinked polyethylene foam manufactured by Toray Co., Ltd. were treated at 23 ° C. and 50 ° C. in accordance with JIS K7203.
The foam having a thickness of 12 mm at% RH was determined from a displacement-stress curve at a rate of 6 mm / min in a three-point bending test at a distance between supporting points of 192 mm, and the elastic modulus was measured from the gradient.
The results are shown in Table 1.

The soundproof hot water heating floors obtained in Examples 1 and 2 and Comparative Examples 1 to 4 were subjected to the following evaluations and are shown in Table 1.

Evaluation of Soundproof Hot Water Heating Floor

(Thermal Efficiency) Hot water of 80 ° C. was flowed through the obtained polyethylene pipe 5 of the soundproof hot water heating floor, and the thermal efficiency (transmitted to the upper surface in the total heat quantity) was measured using a heat flow meter (manufactured by Eiko Seiki Co., Ltd.). Of the amount of heat).

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

(Walking Feeling) The amount of sinking when a steel ball having a diameter of 50 mm was pressed against the hard plate-like body with a force of 80 kgf was measured. In addition, 1.4-2.6 mm is considered to be good. 4
mm or more, when walking, fluffy and uncomfortable
At m, the soles hurt as if walking on concrete. The above results are summarized in Table 1.

[0067]

[Table 1]

[0068]

According to the first aspect of the present invention, since the sound-insulating hot water heating floor is constructed as described above, it achieves both good thermal efficiency and soundproofing performance, and also has an excellent walking feeling. .

The soundproofing hot water heating floor according to claim 2 is configured as described above, 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 cross-sectional view showing an example of a soundproof hot-water heating floor according to the present invention described in claim 2 of the present invention.

FIG. 2 is a cross-sectional view showing an example of a thermoplastic resin foam.

FIG. 3 is a cross-sectional view illustrating an example of a soundproof hot water heating floor of Comparative Examples 1 and 3.

FIG. 4 is an explanatory diagram showing an example of a conventional soundproof hot water heating floor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard plate-shaped body 2 Plate-shaped heating element 3 Hard resin foam 4 Soft resin foam 5 Pipe for hot water supply

Claims (3)

[Claims] 1. A floor material in which a hard plate, a heat sink, and a hard foam are laminated in this order, and a hot water supply pipe is laid in the hard foam. A soundproof hot-water heating floor having a rate of 50 to 300 kgf / cm ² . 2. The foam according to claim 1, wherein the rigid foam comprises a continuous foam layer of a thermoplastic resin, a high foam of a thermoplastic resin disposed on at least one surface of the continuous foam layer, and an outer surface of the high foam. 2. A low-foaming thin film made of a thermoplastic resin to be coated, wherein the plurality of high-foaming bodies are thermoplastic resin foams which are thermally fused to each other via the low-foaming thin film. The described soundproof hot water heating floor. 3. A soundproof hot water heating floor, wherein a soft foam is further laminated on the surface of the soundproof hot water heating floor according to claim 1 on the hard foam side.