JPH0544333A - Layered soundproof floor material - Google Patents

Abstract

PURPOSE:To improve sound absorption and vibration proofing characteristic without increasing the thickness of a floor material. CONSTITUTION:An air holding layer 2 is formed in the middle part of a floor material by interposing a sound absorption vibration control layer 2 comprising at least one nonwoven fabric 21 and a net-like space holding member 23, between a wooden floor base layer 3 comprised of a wooden decorative plate 32 that forms a floor surface, an intermediate sound insulation sheet 33, and of a wooden plate 31, and a vibration proofing material layer 1 as the grounded side. Vibration is drastically damped by the air layer, and transmission of shock vibration sound from the wooden base layer 3 to the vibration proofing layer 1 is mitigated. Noise of 63-2000Hz generated on the floor material can be remarkably damped, and a soundproof floor material of class L-45 classified according to the measurement method of floor shock sound level stipulated in JIS-A-1418, is thus provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to soundproof flooring materials for condominiums and the like, and more particularly to a wood-based laminated soundproofing floor material that effectively damps low-frequency sounds of 250 Hz or less.

[0002]

2. Description of the Related Art In hotels and condominiums, noise such as walking noise of people, jumping noises of children, and individual noise generated when moving a chair is a major cause of deterioration of habitability, especially in rooms on upper floors. Is becoming All of the causes of the above noise are vibrations, and vibrations generated when a person walks or jumps are transmitted to the concrete slab, and are generated by the conventional carpet or carpet to prevent the vibration waves of these sounds from being transmitted. Various measures such as laying carpets have been made.

On the other hand, in recent years, wooden floor materials have been preferred in place of carpets and rugs, so that the transmission of impact sound to the downstairs has become more prominent. Considering this, wooden or steel joists are used for the underfloor part at the time of construction, and the flooring material is laid on it, but this level is not enough to block the sound of the upper floors. .. In order to reduce the transmission of sound generated on this wooden floor material, for example
As can be seen in Japanese Patent No. 9740, a sound-proof flooring material has been proposed and put into practical use, in which a vibration-proof rubber layer is arranged on the lower surface of a plywood with a sound-insulating sheet interposed.

[0004]

The flooring material having the anti-vibration rubber layer on the lower surface as described above is remarkable in the high frequency range where the sound intensity (Hz) called the octave band center frequency is 500 Hz or more. Although it exhibits sound insulation, it has some difficulties in sound insulation in the relatively low frequency range of 500 Hz or less.
There is a problem in sound insulation below Hz. In order to obtain a sufficient sound insulation effect in the low frequency sound range, the hardness of the anti-vibration rubber layer has to be reduced, which affects the compressive strength of the floor board.

Although such inconvenience can be improved by increasing the thickness of the anti-vibration rubber layer, thickening the anti-vibration rubber layer increases the thickness of the floor material, and If the thickness of the plywood part is reduced without changing the thickness, there arises a disadvantage that the strength of the floor plate is reduced. The present invention provides a soundproof flooring material in which the difficulty of sound insulation at 125 Hz or less is improved without increasing the thickness dimension of the vibration isolator.

[0006]

The present inventor has found that the contact area between the sound absorbing and damping material arranged on the lower surface of the flooring substrate and the concrete slab surface is small, and the contact state is substantially point-like, Paying attention to the fact that the sound absorption and vibration damping effect is improved by forming a space in the intermediate layer portion and by interposing air, by forming a linear shape. The above problems have been improved by forming the convex portion and providing the air retaining layer between the flooring material substrate and the vibration damping material layer.

That is, the laminated soundproof flooring material of the present invention has a basis weight of 50 to 200 g per square meter between the vibration damping material layer located on the grounding side of the concrete slab and the wooden floor board serving as the floor surface. A sound absorbing and damping layer comprising at least one non-woven fabric and a net-shaped space retaining material having a porosity of 70% or more and a thickness of 0.5 to 5.0 mm is interposed, and a wooden floor substrate layer and a sound absorbing and damping layer are provided. It has a three-layer structure of a vibration-proof material layer.

As the above-mentioned wood substrate layer, a well-known sound-insulating material in which a wood decorative board, an intermediate sound-insulating sheet and a thick wood board are laminated is applied, and the present inventor first applied to the sound-absorption damping material layer. A tufted carpet material described in Japanese Patent Application No. 2-60322, a needle punched carpet material described in Japanese Patent Application No. 2-62810, a concrete slab such as an embossed rubber or plastic embossed layer described in Japanese Patent Application No. 2-238178. It has a small contact area and is made of a vibration-proof material having compression elasticity.

The space retaining material of the sound absorbing and damping material layer located in the middle is formed of a molding net material having a thickness of 0.5 to 5.0 mm, a natural rubber, a synthetic rubber, a synthetic resin, or a mixture of two or more kinds. A weft is a threaded product with an apparent thickness of 0.5 to 5.0 mm, and synthetic fibers or natural fibers with a thickness of 100 to 1
A net-like sheet, which is an aggregate that creates a space between compressed nonwoven fabrics, such as a coarse sheet having a porosity of 70% or more woven or knitted as a thread through a thread of 5000 denier is suitable. .. And when these aggregates are formed of yarns, the cross-section of the yarns is preferably flat in the lateral direction, and in the case of molded articles, the cross-sectional shape of the aggregates is preferably square or elliptical. The aggregate may be foam. The thickness of the aggregate is preferably in the range of 0.5 to 5.0 mm. If the thickness is smaller than this, an effective space for sound insulation cannot be obtained. Will be increased.

The non-woven fabric laminated on both sides of the space-retaining material is preferably needle-punched non-woven fabric made of thermoplastic synthetic fiber having a thickness of 1 to 20 denier and a weight per square meter of 50 to 200 g / m 2. Is.

[0011]

The laminated soundproof flooring material of the present invention absorbs and attenuates the vibration of the impact sound generated on the decorative wood board by the rubber-based intermediate sound-insulating sheet, and further, the sound-absorbing and damping layer arranged below the sound-damping layer. The vibration-damping material layer absorbs and damps vibrations significantly, and reduces the transmission of vibrations to the concrete slab.

That is, the air layer formed by the needle-punched non-woven fabric, which is one of the constituent materials of the sound absorbing and damping layer, and the space retaining material effectively acts on the vibration damping between 63 and 2000 Hz, Vibration of 63 to 125 Hz is significantly attenuated by the inclusion of air. Further, the vibration-damping material layer is provided with an uneven surface portion on the ground side thereof, and the ground is not a surface support but a dot-like or line-like area with a small ground contact area, and a space portion is formed between the uneven surface portions, which is efficient. It has a strong vibration damping effect, and in combination with the vibration damping function in the sound absorbing and damping layer, it significantly attenuates the noise of 63 to 2000 Hz.

[0013]

[Embodiment 1] FIG. 1 is a perspective view in which a vibration damping material layer (1), a sound absorbing and damping material layer (2), and a wooden floor board layer (3) of a laminated soundproofing floor material (10) are separated into layers. FIG. 2 shows a sectional view in which the layers (1), (2) and (3) are laminated and integrated.

In this example, 60 parts of natural rubber and 40 parts of styrene-butadiene rubber were mixed as the vibration-damping material layer (1), and a foaming agent was added to foam three times, and the thickness was adjusted by molding means. An elastic material having a flat plate portion 11 of 2 mm and a large number of protrusions 12 having a height of 4 mm and a diameter of 4 mm on the lower surface thereof was used. The projections (12) are in the form of short cylinders, and 231 pieces per 10 squares are evenly distributed, and the contact area ratio with the concrete slab is 29%.

In this embodiment, the sound absorbing and damping layer (2) is made of polyester resin fiber having a thickness of 10 denier, and the weight per square meter is 100 g and the apparent thickness is about 1 mm.
A composite sheet material was used in which a net-shaped space holding material (23) having a lattice-like mesh formed of polyethylene resin was interposed and bonded between the sheets of needle-punched nonwoven fabrics (21) (22). The space retaining material (23) has a vertical thickness of the bone part (24) of about 1.2 mm, a horizontal thickness of about 1.5 mm, and a vertical and horizontal intersection.
The thickness of (25) is about 1.5 mm and one mesh area is about 50 mm.
It is a square grout.

The wooden floor substrate layer (3) has a rubber layer having a thickness of about 1 mm between a plywood type wooden plate (31) having a thickness of 5 mm and a wooden decorative plate (32) having a thickness of 3 mm. A commercially available soundproof floorboard with a high-quality sound insulation sheet (33) interposed was used.

[0017]

[Example 2] As the vibration-proof material layer (1), the thickness of the single fiber is 1000
Pile yarn (13) with denier and 1 twist / inch is the base fabric (14)
One side is tufted like a ridge and the apparent thickness is 4 mm
, Pile layer of pile yarn (13) with a basis weight of 350g per square meter
(15) is formed, the tuft mat having a backing layer (16) formed by coating and impregnating a rubber-based emulsion on the other surface penetrated by tufting, the pile layer (15)
Was used as the lower surface.

Further, as the sound absorbing and damping material layer (2), a flat yarn (26) made of polyethylene resin fiber having a thickness of 900 denier is used as a weft between the same two nonwoven fabrics (21) and (22) as in Example 1. As an aggregate, a polyethylene denier fiber monofilament yarn (27) with a thickness of 400 denier was braided as a warp, and the number of weft threads was 11
Book, warp spacing 10 mm, apparent thickness 0.8 mm, porosity 92
A composite sheet material was used in which a space holding material (23) made of a comb-shaped knitted fabric of 10% was interposed and joined.

The wood flooring substrate layer (3) was prepared as in Example 1.
Using the same as above, but these three layers as shown in FIG.
(1), (2) and (3) were laminated and adhered to form a laminated soundproof flooring (10) as shown in FIG.

[0020]

[Example 3] Vibration-damping material layer (1) made of the elastic material of Example 1
Instead, the vibration damping material layer (1) of the tuft mat of Example 2 was used to obtain a laminated soundproofing floor material (10). (Illustration omitted)

[0021]

[Example 4] A laminated soundproof flooring material (10) was obtained by using the vibration-damping material layer (1) made of the elastic material of Example 1 instead of the vibration-damping material layer (1) of the pile mat of Example 2. did. (Illustration omitted)

[0022]

[Embodiment 5] As shown in FIG. 5, the sound absorbing and damping layer (2) of Embodiment 1 was used as one non-woven fabric (21) having a basis weight of about 150 g per square rice and a net used in Embodiment 1. Space-holding material (2
It is composed by 3).

On the other hand, as shown in FIG. 6, the same wood floor board layer (3) as that of the embodiment in which the wood board (31) and the wood decorative board (32) are bonded together via the intermediate sound insulation sheet (33). Sound insulation floor material (20) with sound insulation class L-50 according to JIS A 1418, which has a rubber layer (17) with a thickness of 10 mm on the bottom surface and embossed on the bottom surface.
Was obtained, and the sound insulation properties thereof were compared with the laminated soundproof flooring materials (10) of the above Examples 1 to 5 of the present invention. The results are shown in Table 1.

[0024]

[Table 1]

For comparison of sound insulation, the extent to which the sound of each frequency generated by impact is transmitted downstairs was measured according to JIS-A-1418.

Since part of the sound absorbing and damping layer (2) according to the present invention is composed of fibers, microorganisms such as mites and molds may be generated during long-term use. This problem is ameliorated by using a fiber carrying copper ions, which has a long-term antibacterial and deodorant ability, in at least a part of the nonwoven fabric (21) (22) constituting the sound absorbing and damping layer (2). can do.
The amount supported on the copper ion fibers is preferably 0.5% by weight or more, and a cellulosic fiber can be mentioned as a fiber suitable for supporting the copper ions. Even when the vibration-damping material layer (1) made of fibers as in Example 2.4 is used, it is preferable to impart antibacterial and deodorant properties as described above.

[0027]

As described above, the laminated soundproof flooring material of the present invention (10)
Is 50 to 200 per square meter between the vibration-damping material layer (1) located on the ground side and the wooden floor substrate layer (3) that is the floor surface.
Sound absorbing and damping layer comprising at least one non-woven fabric (21) or (22) of g and a net-shaped space retaining material (23) having a porosity of 70% or more and an apparent thickness of about 0.5 to 5.0 mm. (2)
Since these three layers (1), (2) and (3) are laminated and integrated, the vibration of the impact sound generated on the laid wooden floor board (32) of the floor material (10) causes vibration of the wooden floor. After being absorbed and attenuated by the rubber-based intermediate sound insulation sheet (33) of the substrate layer (3), it is further absorbed by the air layer formed by the non-woven fabric of the sound absorption and vibration damping layer (2) and the space retaining material arranged below it. The vibration is damped, and then the vibration damping material layer (1) disposed below the vibration damping material absorbs and dampens the vibration, thereby exerting an effect of significantly mitigating the vibration transmission to the concrete slab.

That is, the sound absorbing and damping layer (2) composed of the needle punched non-woven fabric, which is one of the constituent materials of the sound absorbing and damping material, and the space holding material is useful for damping the vibration between 63 and 2000 Hz, and is also a vibration damping material. The lower surface of the layer (1) is composed of many convex parts,
The contact state with the concrete slab is practically point-like or linear, the contact area is small, and since a large amount of air is also present in this sound-damping layer (2), an effective vibration damping action is obtained. None, it significantly attenuates noise of 63 to 2000 Hz and exhibits excellent soundproofing. Furthermore, as shown in Table 1, this soundproofing property is achieved without increasing the thickness of the floor material (10) as a whole.
It is possible to obtain a floorboard of class L-45 class in the floor impact sound level measurement method specified in 1418.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view showing a laminated soundproof flooring of the present invention separated for each layer.

FIG. 2 is a cross-sectional view of the laminated soundproof floor material of FIG.

FIG. 3 is a cutaway perspective view showing another embodiment of the laminated soundproofing flooring material of the present invention separated for each layer.

FIG. 4 is a cross-sectional view of the laminated soundproofing floor material of FIG.

FIG. 5 is a sectional view showing another embodiment.

FIG. 6 is a cross-sectional view of a soundproof flooring material of a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vibration damping material layer 2 Sound absorbing and damping material layer 3 Wooden floor board layer 10 Laminated soundproofing floor material 21 Nonwoven fabric 22 Nonwoven fabric 23 Space retaining material 31 Wooden board 32 Wooden decorative board 33 Intermediate sound insulation sheet

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[Procedure amendment]

[Submission date] December 20, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction method] Change

[Correction content]

The space retaining material of the sound absorbing and damping material layer located in the middle is formed of a molding net material having a thickness of 0.5 to 5.0 mm, a natural rubber, a synthetic rubber, a synthetic resin, or a mixture of two or more kinds. A weft is a threaded product with an apparent thickness of 0.5 to 5.0 mm, and synthetic fibers or natural fibers with a thickness of 100 to 1
A net-like sheet, which is an aggregate that creates a space between compressed nonwoven fabrics, such as a coarse sheet having a porosity of 70% or more woven or knitted as a thread through a thread of 5000 denier is suitable. .. And when these aggregates are formed of yarns, the cross-section of the yarns is preferably flat in the lateral direction, and in the case of molded articles, the cross-sectional shape of the aggregates is preferably square or elliptical. The aggregate may be foam.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction method] Change

[Correction content]

Further, the non-woven fabric to be bonded to the space retaining material has a thickness of 1 to 20 denier and a weight per square meter of 50.
Needle punched non-woven fabrics consisting of ˜200 g of thermoplastic synthetic fibers are preferred.

[Procedure 3]

[Document name to be amended] Statement

[Correction method] Change

[Correction content]

[0017]

[Example 2] As the vibration-proof material layer (1), the thickness of the single fiber is 1000
Pile yarn (13) with denier and 1 twist / inch is the base fabric (14)
One side is tufted like a ridge and the apparent thickness is 5 mm
, Pile layer of pile yarn (13) with a basis weight of 350g per square meter
(15) is formed, the tuft mat having a backing layer (16) formed by coating and impregnating a rubber-based emulsion on the other surface penetrated by tufting, the pile layer (15)
Was used as the lower surface.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction method] Change

[Correction content]

Further, as the sound absorbing and damping material layer (2), a flat yarn (26) made of polyethylene resin fiber having a thickness of 900 denier is used as a weft between the same two nonwoven fabrics (21) and (22) as in Example 1. As an aggregate, a polyethylene denier fiber monofilament yarn (27) with a thickness of 400 denier was braided as a warp, and the number of weft threads was 11
Book, warp spacing 10 mm, apparent thickness about 0.6 mm, porosity 92
A composite sheet material was used in which a space holding material (23) made of a comb-shaped knitted fabric of 10% was interposed and joined.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction method] Change

[Correction content]

[Table 1] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, the space holding material of the sound absorbing and damping material layer located in the middle is formed of a molding net material having a thickness of 0.5 to 5.0 mm,
Natural rubber, synthetic rubber, synthetic resin, or a molded product of a mixture of two or more kinds, a thread having an apparent thickness of 0.5 to 5.0 mm is used as a weft, and synthetic fiber or natural fiber has a thickness of 100.
A net-like sheet, which is an aggregate that creates a space between compressed nonwoven fabrics, such as a coarse sheet having a porosity of 70% or more, which is woven or knitted as a thread through a thread of 15,000 denier, is suitable. is there. And when these aggregates are formed of yarns, the cross-section of the yarns is preferably flat in the lateral direction, and in the case of molded articles, the cross-sectional shape of the aggregates is preferably square or elliptical. The aggregate may be foam.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The non-woven fabric to be bonded to the space-holding material has a thickness of 1 to 20 denier and a basis weight per square rice.
Needle punched nonwoven fabrics consisting of 50 to 200 g of thermoplastic synthetic fibers are suitable.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

The vibration-damping material layer (1) has a single fiber thickness of 10
Pile yarn (13) with 00 denier and 1 twist / inch is used as the base fabric (1
4) One side is tufted like a ridge and the apparent thickness is 5m.
m, pile layer of pile yarn (13) with a basis weight of 350 g per square meter
(15) is formed, the tuft mat having a backing layer (16) formed by coating and impregnating a rubber-based emulsion on the other surface penetrated by tufting, the pile layer (15)
Was used as the lower surface.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

In addition, as the sound absorbing and damping material layer (2),
Between the same two non-woven fabrics (21) and (22), a flat yarn (26) made of polyethylene resin fiber having a thickness of 900 denier is used as a weft to form an aggregate, and a polyethylene resin fiber monofilament yarn having a thickness of 400 denier ( Number of wefts
11, warp interval 10mm, apparent thickness about 0.6mm, porosity
A composite sheet material was used in which a space holding material (23) made of 92% interlaced knitted fabric was interposed and joined.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction content]

[0024]

[Table 1]

Claims (2)

[Claims] 1. At least one non-woven fabric having a weight per unit area of 50 to 200 g per square meter of rice and at least 70% of the vibration damping material layer located on the lower surface of the grounding side and the wooden floor substrate serving as the floor surface. A laminated sound-insulating flooring material, characterized in that a sound-damping and damping layer comprising a net-shaped space retaining material having a porosity and a thickness of 0.5 to 5.0 mm is interposed. 2. The laminated sound-insulating flooring material according to claim 1, wherein the non-woven fabric of the sound-damping and damping layer is formed of fibers having at least a part of which copper ions are carried.