JPH055356A - Soundproof damping material, and wooden soundproof floor material made therewith - Google Patents

Abstract

PURPOSE:To improve sound insulation by a method wherein a damaping material is formed by lamination into one unit of a synthetic fiber mat in three dimensional network structure wherein the synthetic fibers are bonded at their intersecting points by heat sealing and an elastic body made by bonding elastic small pieces such as granulated rubber. CONSTITUTION:A synthetic fiber mat 2 is formed by a method wherein polyethylene fibers, polypropylene fibers or the like are uniformly scattered in three dimensional network and the fibers are bonded at their intersecting points by heat sealing. Small pieces 4 of elastic bodies such as rubber or cork having moderate compressive modulus and dynamic loss modulus are aggregated, and an elastic body 3 made by bonding elastic small pieces is formed by sticking the aforementioned small pieces together into one unit with adhesive agent. Then a soundproof damping material 1 is made up by laminating the synthetic fiber mat 2 and the elastic body 3 into one unit. After placing the soundproof damping material 1 on a floor board, a surface material is laid thereon. Therefore, sound insulation is ensured for light impact sound applied to the floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor of a house, particularly an apartment house, for example, a reinforced concrete floor slab cast in situ, a PC floor slab manufactured at a factory, a lightweight concrete floor slab, an aerated concrete floor slab, or a wooden floor slab. The present invention relates to a floor material formed on a floor slab used as a floor of upper and lower floors, and particularly to a cushioning material having an excellent soundproofing effect and a wood-based soundproofing flooring material having the same.

[0002]

2. Description of the Related Art Traditionally, floor mats of this type have
Carpets or rugs are often used, but due to the problems of health problems caused by the occurrence of mites and molds, they are highly effective in suppressing mites and molds, and are easy to clean and have a feeling of cleanliness. Wood-based flooring materials that are bright and have a high-class feel are attracting attention.

However, in the case of a wooden floor material, the sound insulation performance against so-called light floor impact sound such as the sound of dragging a chair, the sound of dropping a spoon or a knife, the sound of walking slippers or sandals, etc. is inferior. Has caused a lot of noise complaints. Therefore, various wooden soundproof floor materials having improved sound insulation performance against light-weight floor impact sound have been proposed, and generally, a structure in which various cushioning materials are provided on the back surface of the wooden floor material. In addition, various ideas have been made for the wooden floor material itself, and there is a wooden floor material that uses a damping material or a material having various cushioning effects as part of the layers constituting the wooden floor material. Alternatively, it has been proposed that the wood layer of the wood floor material is a plywood with holes, or the groove of the wood floor material is devised in order to prevent the warp of the wood floor material. Although the effect of can be expected, a material having higher sound insulation performance against light-weight floor impact sound has been demanded, and these configurations cannot always sufficiently cope.

[0004]

[Means for Solving the Problems] As a result of intensive studies made by the present inventors in view of such problems, the cushioning material having a specific layer structure has extremely excellent sound insulation performance, The present invention has been found to have a high sound insulation performance against a light weight floor impact sound in a wooden floor material which has been a conventional problem in combination with a wooden floor material.

That is, according to the present invention, a sound absorbing cushioning material and a wood surface layer in which a synthetic fiber mat having a three-dimensional network structure formed by bonding by fusion at a cross point of synthetic fibers and an elastic piece combination are integrally laminated. From a wooden soundproof floor material in which a flexible sheet, a base plate having a groove portion or a base plate having a groove portion and a through hole are sequentially laminated on the back surface of the plate and the wooden floor material and the soundproof cushioning material are laminated. Become.

A cross-sectional view of an example of the soundproof cushioning material of the present invention is shown in FIG. The soundproof cushioning material 1 is a synthetic fiber mat 2 and an elastic piece combination 3 which are laminated and integrated, and the synthetic fiber mat 2 is made of polyethylene, polypropylene, nylon, or another fiber having a heat fusion property. Is used,
It is a material in which the fibers are fused to each other at the crossing points of the fibers by heating in forming the mat-like shape, and the bulky state is maintained. The fiber diameter is preferably larger from the viewpoint of sound insulation performance,
In order to obtain a mat having a three-dimensional mesh structure, the thickness is up to about 100 μm in consideration of manufacturing efficiency and the like, and generally it is in the range of 50 to 100 μm. In addition, the smaller the density, the better the sound insulation performance, but it is up to about 0.02 g / cm ² in order to obtain a homogeneous mat-like material, and the amount of strain at the time of walking becomes large, which causes discomfort. Therefore, the one with a higher density is selected. But 0.1g
If it exceeds / cm ² , the sound insulation performance is significantly deteriorated, which is not preferable. Even if the fiber diameter and the density are the same, if the flexibility of the mat is different, the sound insulation performance is different, and the more flexible one is preferable. For example, when a 100 mm × 100 mm aluminum plate (100 g) is placed for 3 minutes, the ratio of the thickness to the original thickness (hereinafter referred to as “holding ratio”) is 20 to
About 30% is preferable.

The elastic small piece combination 3 is a combination of elastic small pieces 4 such as rubber and cork having an appropriate compression elastic modulus and an appropriate mechanical loss coefficient, which are integrated by an adhesive. The size is preferably in the range of 1 to 7 mm. The bulk density is preferably in the range of 0.2 to 0.5 g / cm ² . If it is less than this range, the sound insulation performance is sufficient, but the amount of distortion when a load is applied becomes large. on the other hand,
If it exceeds this range, sufficient sound insulation performance cannot be obtained. In the production of such elastic small piece combination, when the aggregate of elastic small pieces to which an adhesive is applied is strongly pressed with a plate-like body, the surface irregularities are almost eliminated, and the sound insulating performance cannot be sufficiently obtained, so that the elastic small pieces are present on the surface. Furthermore, it is preferable that the particles are accumulated on a substrate (nonwoven fabric or the like) so as to have a scattered and protruding structure, and are lightly rolled into a desired thickness by a roll or the like. As an efficient manufacturing method of the elastic piece combination (sheet-like) having such a structure, Japanese Patent Application No. 1-3446 of the present applicant can be used.
There is No. 03.

The cushioning material of the present invention is required as a cushioning material for flooring materials due to the synergistic action of the synthetic fiber mat having an extremely excellent sound insulation performance and the elastic piece combination having excellent sound insulation performance and having a small strain amount against a load. It satisfies the physical properties, and the thickness of each layer can be changed according to requirements, but generally about the same thickness is applied. Also,
Although it depends on the thickness of the flooring material main body, the thickness of the entire cushioning material is generally in the range of 5 to 10 mm.

The elastic pieces are integrally bonded with an adhesive, and the type and amount of the adhesive may be appropriately selected in consideration of the type of the elastic pieces to be used, the bulk density and the like. The elastic piece combination and the synthetic fiber mat may be bonded together with an adhesive, but the bonding operation is preferably completed in a short time because the synthetic fiber mat becomes too dense when pressure-bonded for a long time. From this point of view, the adhesive can be applied between the synthetic fiber mat and the elastic small piece bonded body, and then this product can be heated and pressure-bonded under reduced pressure to ensure reliable bonding in a short time. By doing so, the thickness is generally about half (the density is about twice), and it is necessary to select the density of the synthetic fiber mat to be used in consideration of this.

Such a soundproof cushioning material is useful as a base cushioning material for various flooring materials, and various surface flooring materials may be laid after being applied on a floor slab. The present invention also provides a light wooden flooring material having excellent sound insulation performance against floor impact sound.

FIG. 2 is a cross-sectional view showing an example of the wood-based soundproof flooring material of the present invention. The wood-based soundproofing floor material 5 is a floor composed of a flexible sheet 7 and a base plate 8 on the back surface of a wood surface layer board 6. The material main body and the soundproof cushioning material layer composed of the synthetic fiber mat 2 and the elastic piece combination 3 described above.

The wood surface board 6 is usually 1 to 5 mm thick and is made of a decorative board or a natural wood veneer. In the case of a decorative plate, it is general that plywood is laminated between wood plates having a wood grain pattern of natural wood and a thickness of about 0.3 mm.

Examples of the flexible sheet 7 include vinyl chloride resin-based, ethylene-vinyl acetate copolymer resin-based, asphalt-based, butyl rubber-based, etc. materials generally called damping materials, and foam materials of various synthetic rubbers. Is used. The thickness is suitably in the range of 0.5 to 2 mm.

As the base plate 8, a plywood is usually used, but various particle materials, fiber boards and the like can of course be used. The thickness of the base plate is determined in consideration of the thickness of the entire floor material, strength, etc., but is usually in the range of 3 to 12 mm.

A groove 9 is formed in the base plate 8. However, in a wooden floor material, it is provided to prevent the floor material from warping or to easily follow the unevenness of the floor slab. Forming the groove is generally performed, but in the present invention, such a groove is an essential configuration from the viewpoint of sound insulation performance, the depth is preferably deeper, the thickness of the base plate. It is preferable that the same or even a flexible sheet is configured to be completely cut. The grooves can be formed only in the vertical direction, only in the horizontal direction, or in both the horizontal and vertical directions, but from the viewpoint of sound insulation performance, it is preferable to form the grooves in both the vertical and horizontal directions. Further, the groove interval is usually in the range of 50 to 90 mm.

It is extremely effective in terms of sound insulation performance to provide the through hole 10 in addition to the groove portion, and in general, it is preferable that the shape is circular and the diameter is 30 mm or less. If it is larger than this, there is a problem in strength when a load with a small contact cross-sectional area is applied, although it depends on the strength of the wooden surface layer. Further, if it is smaller than this range, there is no particular limitation, but in general, up to 10 mm is used. The intervals between the through holes are preferably equal to each other in order to homogenize the sound insulation performance, and a range of 50 to 90 mm is used. Further, the formation position can be formed between the groove portions, between the groove portions or the groove portions, or independently of the groove portions.

The wooden floor material and the soundproof cushioning material are laminated, but they may be laminated in any order. That is, the wooden floor material side may be a synthetic fiber mat,
On the contrary, an elastic small piece combination may be used. It is easier to handle the elastic small piece combination when laying the elastic body on the material such as non-woven fabric at the time of manufacturing. Generally, a thin non-woven fabric layer is provided on one side, and it is integrated with the synthetic fiber mat. In the above, since the non-woven fabric layer is integrated so that it is on the outside, it is possible to prevent the adhesive from entering the inside during the construction on the floor slab, so that it is possible to prevent the deterioration of the sound insulation performance due to the curing of the adhesive. Therefore, it is preferable to use a synthetic fiber mat on the wooden floor material side.

When the elastic piece combination is provided on the side of the wooden floor material, it is preferable to provide a layer of non-woven fabric or the like in order to prevent the adhesive from entering from the surface of the synthetic fiber mat which comes into contact with the floor slab. ..

The production of the wooden soundproofing floor material is not necessarily limited, but the wooden surface layer plate and the base plate (in the case of the structure having the through holes, the base plate having the through holes previously formed) are used. A preferred method is a method in which a flexible sheet is bonded and integrated to form a groove, and then a groove is formed, and a soundproof cushioning material composed of a synthetic fiber mat and an elastic body small piece bonded body which are bonded and integrated in advance is laminated.

[0020]

The present invention will be described in detail below with reference to examples. Example 1 A mat (thickness 7 mm, bulk density 0.03 g / bulk) in which polyethylene-polypropylene fibers having a fiber diameter of 70 μm are uniformly dispersed in a three-dimensional mesh and are adhesively molded at the crossing points of fibers by heat fusion without a binder. cm ² , retention rate 23%),
Elastic small piece combination obtained in accordance with the method of Japanese Patent Application No. 1-344603 (use of rubber pieces of 1 to 3 mm, thickness of 4 mm, bulk density of 0.4, adhesion of non-woven polyester fabric with basis weight of 30 g / m ^{2 on} one side) And EVA emulsion (TA-204 manufactured by Oshika Kogyo Co., Ltd.) as an adhesive were laminated using 150 g / m ² and heated under reduced pressure so that the non-woven fabric layer was on the outer side and integrated (adhesion). Strength 5 kg / 16 cm ² ).

As a surface layer board, a board having a thickness of 0.3 mm, a plywood board having a thickness of 2.5 mm, and a board having a thickness of 0.3 mm, a flexible sheet having a foamed chloroprene rubber sheet having a thickness of 1 mm, and a base board having a thickness of 6 mm plywood was laminated and integrated, and grooves having a width of 2.8 mm were cut at a distance of 45 mm so that the foamed chloroprene rubber sheet was also cut to form grooves having a width of 50 mm and a width of 1.3 mm. ..

The wooden floor material and the cushioning material were bonded together so that the elastic small piece assembly was on the outside to obtain a wooden soundproof floor material. In this state, the synthetic fiber mat had a thickness of 3 mm and the layer had a bulk density of 0.07 g / cm ² .

This wooden soundproof flooring material is directly attached to a reinforced concrete floor slab having a thickness of about 150 mm, and is measured according to "Measuring method of floor impact sound level at building site JISA-1418" to obtain a lightweight floor impact sound level _LL. As a result of obtaining the number (dB), it was 43. Further, the load amount of 80 kg was applied to the loading plate having a diameter of 50 mm, and the amount of strain (the amount of reduction in thickness) was measured, and the result was 2 mm.

Example 2 A wooden soundproof floor using the same cushioning material as in Example 1 except that the wooden flooring material having the same structure as in Example 1 is used and the raw material synthetic fiber mat having a retention rate of 30% is used. Material L _L
It was 44 as a result of measuring the number (dB). The amount of strain was 2 mm.

Example 3 A wood-based flooring material having the same structure as that of the wood-based flooring material of Example 1 except that the groove depth was 6 mm was used.
Wood-based soundproof floor material obtained by using the same cushioning material as in L
It was 45 as a result of measuring the _L number (dB). The amount of strain was 2 mm.

Example 4 A through hole having a diameter of 20 mm (only the base plate penetrates) in a portion delimited by vertical and horizontal grooves in the wooden flooring material having the structure of Example 1.
The woody flooring construction using provided for wood-based sound-insulating floor members obtained by using the same cushioning material as in Example 1 L _L number (d
It was 41 as a result of measuring B). The amount of strain is 2 mm
Met.

Using a wooden flooring material having the same structure as in Example 1,
The L _L number (dB) of the wood-based soundproof flooring material obtained in the same manner as in Example 1 except that the density of the raw material synthetic fiber mat was 0.05 / cm ² was 45. The amount of strain was 2 mm.

COMPARATIVE EXAMPLE 1 The L _L number (dB) of the wood-based soundproof flooring material obtained in the same manner as in Example 1 except that the cushioning material layer in Example 1 was 7 mm thick only by the elastic piece combination. The measurement result was 47. The amount of strain was almost zero.

COMPARATIVE EXAMPLE 2 In Example 1, the cushioning material layer was made of synthetic fiber mat (density of 0.
Example 7 except that the thickness is 7 mm with only 07 / cm ³ ).
L _L number (d
The result of measurement of B) was 40. On the other hand, the amount of strain is 6 mm
When walking on the floor, the feeling of walking was extremely poor.

[0030]

INDUSTRIAL APPLICABILITY The soundproof cushioning material of the present invention is excellent in sound insulation performance against light-weight floor impact sound, has appropriate strain resistance to the load of heavy objects, and is useful as a soundproof base material for various floors. Moreover, the wood-based soundproofing floor material using this is extremely useful as a soundproofing floor material for an apartment house or the like.

[Brief description of drawings]

FIG. 1 shows a cross-sectional view of a soundproof cushioning material of the present invention.

FIG. 2 shows a cross-sectional view of the wood-based soundproof flooring material of the present invention.

[Explanation of symbols]

1 ・ ・ Soundproof cushioning material 2 ・ ・ Synthetic fiber mat 3
..Coupling of elastic small pieces 4..Small elastic pieces 5..Wooden soundproof flooring 6
..Wooden surface plate 7 ... Flexible sheet 8 ... Bedboard 9
..Grooves 10 ...

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Nakamura 2805 Imafuku Nakadai, Kawagoe City, Saitama Central Research Institute Tokyo Co., Ltd. (72) Yoshitaka Sugata 2805 Imafuku Nakadai, Kawagoe City, Saitama Prefecture Central Glass Tokyo Research Institute Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A synthetic fiber mat having a three-dimensional network structure formed by bonding by thermal fusion at an intersection of synthetic fibers and an elastic piece combination are laminated and integrated. Soundproof cushioning material. 2. A flexible sheet, a groove portion or a base plate having a groove portion and a through hole are sequentially laminated on the back surface of a wooden surface layer board by heat fusion at the intersection of a wooden floor material and a synthetic fiber. A wood-based sound-insulating floor material comprising a sound-absorbing cushioning material in which a synthetic fiber mat having a three-dimensional mesh structure formed by bonding and an elastic piece combination are integrally laminated.