JPH07324436A - Woody soundproof flooring material - Google Patents

Abstract

PURPOSE:To heighten soundproofing effect by a method wherein both sides of a laminated body are constructed respectively of a woody surface board and a cushioning material. CONSTITUTION:The surface on one side of a woody soundproof flooring material is made from a woody surface board 1 for serving as the surface that is seen and trodden by residents when processed for interior finishing for use as a floor, and the surface on the other side of the woody soundproof flooring matrerial is made from a cushioning material 5 that is to be processed for sticking to a concrete slab. In the woody part, the part other than the cushioning material 5 of the woody soundproof flooring material, a flexible sheet 2 and a base board 3 having grooves 4, extremely useful for a soundproofing purpose, are successively stuck to the reverse side of the woody surface board 1 to form an integral body. The cushioning material 5 is constructed from a synthetic fiber mat that is superbly soundproofing and highly strain-resistant against load and made up in 3-5mm of apparent thickness and in 0.03-0.06g/cm<2> of bulk density and in a structure of three-dimensional network made of synthetic fiber monofilaments, each approximately in 80-150mum of diameter.

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 that is 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 used on a floor slab used as a floor of upper and lower floors, and particularly to a wood-based soundproof floor material having a cushioning material and excellent in soundproofing effect.

[0002]

2. Description of the Related Art Traditionally, tatami mats, carpets or carpets have been often used as flooring materials having a soundproofing effect. However, it has been pointed out that there is a problem of health problems due to the occurrence of mites and molds. Wood-based flooring materials that have a high effect of suppressing mold, are easy to clean and have a clean feeling, and have the feel of a natural material and a bright and high-class feeling have been attracting attention.

However, since the wooden floor material is particularly inferior in light-proof floor impact sound, for example, sound of dragging a chair, sound of dropping a spoon or knife, walking sound of slippers or sandals, noise on the upper and lower floors. It is causing a lot of complaints. Therefore, various wooden soundproof flooring materials having improved soundproofing performance against light-weight floor impact sound have been proposed.
For example, a material that uses damping materials and various buffering materials as part of the layers that make up the wooden floor material, or the wooden floor material is made of perforated plywood or the wooden floor material. There is a device in which the shape of the groove provided for preventing the warpage of the material is devised. As a practical wooden soundproof flooring material, it is general to have a structure in which various cushioning materials are provided on the back surface of the wooden flooring material together with these measures or independently.

Japanese Patent Application Laid-Open No. 61-294065 discloses that
The vibration loss coefficient of the kneaded material of sheet-like elastic material, high specific gravity inorganic powder and synthetic resin is 0.20 on the concrete floor surface.
There is described a vibration-proof / sound-proof floor structure characterized by stacking sheet-shaped objects of up to 0.60 and arranging a wooden floor material on the upper surface of the sheet-shaped objects. As the sheet-like elastic body, the fiber non-woven molding sheet disclosed in Japanese Patent Publication No. 54-1833 is exemplified as a sheet-like elastic body, which is excellent in handleability and vibration-proof effect and is preferably used. This sheet-like elastic body comprises a web containing at least 30% (by weight) of the composite fiber which is heat-fusible and has low thermal latent crimpability, which is described in the specification, and which is higher than the melting point of the heat-fusible component. Is also a non-woven molded sheet obtained by preheating to a temperature lower than 50 ° C. or higher and then press molding.

Japanese Unexamined Patent Publication No. 5-5356 discloses a buffer in which a synthetic fiber mat having a three-dimensional network structure formed by bonding by fusion at an intersection of synthetic fibers and an elastic piece combination are laminated and integrated. A material is disclosed and it is described that it has excellent soundproofing effect. Further, in the same book, a flexible sheet and 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 wooden surface layer, and the above-mentioned cushioning material is further laminated on the wooden floor material. It is also described that the wooden soundproof flooring material has excellent soundproofing effect.

[0006]

Recently, there has been an increasing demand for a lightweight soundproofing material against a floor impact sound, and a wood-based soundproofing floor material composed of a combination of many of the above-mentioned ideas is proposed. Has been done. Although all of these have excellent soundproofing effects, the structure becomes complicated and the manufacturing cost increases and the construction is difficult. Therefore, an object of the present invention is to provide a soundproof flooring material that is easy to manufacture without lowering the soundproofing effect by specifying a cushioning material among various configurations that have an effect on soundproofing.

[0007]

[Means for Solving the Problems] As a result of intensive studies made by the present inventors in view of the above problems, a wood-based soundproof flooring material having a specific layer structure has extremely excellent soundproofing performance, and particularly sound insulation. The present invention has been found to have high soundproofing performance against light floor impact sound in wooden floor materials, which has been a problem in the past when the material has a specific structure.

That is, the present invention is a wood-based soundproof flooring material comprising a wood surface layer board and a cushioning material forming both outer surfaces of a laminate, wherein the cushioning material has an apparent thickness of 3 to 5 mm and a bulk density of 0.03.
~ 0.06 g / cm ³ and a three-dimensional mesh structure synthetic fiber mat made of a single diameter synthetic fiber having a fiber diameter of about 80 to about 150 µm. Is.

Examples of the wood soundproof flooring material of the present invention are shown in FIGS. 1 to 4, and these will be described in detail.
Naturally, it is possible to make design changes without departing from the functions and effects.

The wood soundproof flooring material of the present invention is a laminated body in which a plurality of layers are bonded and integrated, and one outer surface is made of a wood surface layer board, and when it is installed on a floor or the like, it is visually recognized as an interior by a resident or the like. It is the surface that pedestrians contact when walking,
The other outer surface is a surface made of a cushioning material that is adhered to the concrete floor slab.

Of the layers constituting the wood soundproof flooring of the present invention, the portion excluding the cushioning material (hereinafter referred to as "woody portion").
It is essential to dispose a wooden surface layer plate on the surface to be a walking surface, but other configurations are not limited, and a material not using wood as a raw material may be partially used. In this case, it is preferable that the total thickness of the layer made of wood as a raw material is ½ or more of the thickness of the wood portion.

The wooden surface layer board is made of a decorative board or a natural name wood veneer. The decorative board is made by laminating and bonding plywood between wood plates of about 0.3 mm thickness having a natural wood grain pattern. Be preferred. The thickness of the wood surface board is usually about 3 to 20 mm, and more preferably 3 to 12 mm, when the wood part is composed of the wood surface board only. If it is 3 mm or less, the strength as a flooring material, particularly the strength against a load on a small area is lowered, which is not preferable, and if it is 20 mm or more, there is no particular problem but it is preferable to avoid it economically.

When the wood part is not formed of the wood surface plate alone, one or more layers of various materials, shapes, and thicknesses are attached to the back surface of the wood surface plate, but as far as possible, The one or two layers as illustrated are economically preferable. Examples of such a wood portion are those in which a flexible sheet 2 is attached to the back surface of a wood surface layer plate 1, or those having a base plate 3 further having a groove portion 4 as shown in FIG. 2, or An example is shown in FIG. 3, in which a base plate having a groove portion 4 and a through hole 5 is sequentially laminated and integrated. In addition, a layer having a main thickness among the layers forming the wood part may be referred to as a base plate in the present specification.

Examples of the flexible sheet 2 include vinyl chloride resin-based, ethylene-vinyl acetate copolymer resin-based, asphalt-based, butyl rubber-based, etc. materials generally called damping materials, SBR, NBR, IR, chloroprene resins. Various synthetic rubber foam materials such as urethane resin are used. The thickness is suitably in the range of 0.5 to 2 mm.
If it is 0.5 mm or less, the soundproofing effect and the displacement are not sufficiently followed, which is not preferable.

As the base plate 3 which is a part of the wood part, 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 and strength of the entire floor material, but is usually 3 to 12 m.
The range is m.

Grooves 4 may be formed in the base plate 3 and / or the wooden surface layer plate. It is common practice to form such a groove in a wooden floor material in order to prevent warping of the floor material or to easily follow the unevenness of the floor slab. In the above, the groove portion is extremely effective in terms of soundproof performance. The depth of the groove is preferably deeper, and for example, in the configuration shown in FIG. 1, it is preferable that the depth is about ½ of the thickness of the wooden surface layer board. Further, in the configuration shown in FIG. 2, a depth of about one half of the floor plate thickness excluding the cushioning material,
It is preferable that the flexible sheet has the same thickness as the base plate, or the flexible sheet is partially or completely cut. The grooves can be formed only in the vertical direction, only in the horizontal direction, or in both the vertical and horizontal directions, but from the viewpoint of soundproof performance, it is preferable to form the grooves in both the vertical and horizontal directions.

The intervals between the grooves may be designed to be constant when the floor slab is installed, but they may be designed to be irregular, and the irregular intervals are regularly repeated. May be designed to The groove interval is usually in the range of 10 to 90 mm. 1
If it is less than 0 mm, the processing becomes complicated, and if it is 90 mm or more, it is not preferable because it is inferior in the ability to follow the unevenness of the floor slab. The width of the groove is determined by the blade of a saw used for normal working, but may be about 1.0 to 3.0 mm.

It is extremely effective in terms of soundproof performance to provide a through hole 6 in addition to the groove portion in the wood portion. The shape is not limited, but from the viewpoint of ease of processing, the shape is generally circular and preferably has a diameter of 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, the one up to 10 mm is used. The formation intervals of the through holes may be irregular, but the uniform intervals are more preferable for homogenizing the soundproof performance, and a range of 50 to 90 mm is used. Further, the forming position may be a groove portion, an intermediate portion between the groove portions or a groove portion regardless of the groove portion. Such a through hole can be provided in a part or the whole of the wooden surface layer plate and / or the base plate.

The cushioning material in the present invention is polyethylene,
Materials made of polypropylene, nylon, etc. are used.Of these, polypropylene is preferred, and polypropylene fibers coated or adhered with a thermoplastic resin or adhesive are melt-bonded by the fibers at the crossing points of the fibers. What is shaped like a mat while maintaining a bulky state having a three-dimensional network structure is preferably used.

The fiber diameter used in the cushioning material of the present invention is 80 to
When the thickness is 150 μm or less, the floor surface sinks greatly and the walking feeling becomes unfavorable, which is not preferable, and when the resistance of the air flowing between the fibers becomes large and a sound is produced, the air pressure rises and the propagation of sound waves occurs. It is not preferable because it becomes good and the soundproofing performance deteriorates.

On the other hand, when the fiber diameter is 150 μm or more, L_Lnumber
("Method of measuring floor impact sound level at building site J
Lightweight floor impact sound level measured according to "ISA-1418"
Le L _LRefers to the number (dB). ) Becomes large and the sound insulation performance is poor.
It is not preferable because In addition, the smaller the bulk density, the more soundproof performance
Is good, but in order to obtain a homogeneous mat-like product, it is 0.
03 g / cm³Some bulk density is required,
When the bulk density is low, the amount of strain when walking becomes large, which causes discomfort.
0.03g / cm for giving³Greater density
Something is selected. But 0.06 g / cm³Exceeds
It is not preferable because the soundproofing performance becomes extremely poor. Fiber
Even if the diameter and density are the same, the flexibility as a mat is different.
Then, the soundproofing performance is different, and a more flexible one is preferable. An example
For example, 100 mm x 100 mm aluminum plate (100 mm
Ratio of thickness to original thickness when g) is placed for 3 minutes
(Hereinafter, it is called a retention rate and is displayed by%.) Is 10-40.
%, 20% to 30% is more preferable
Yes.

The main feature of the soundproof function in the present invention is a cushioning material made of a synthetic fiber mat which is extremely excellent in soundproofing performance and has a small amount of strain with respect to a load. The thickness of the cushioning material is preferably in the range of 3 to 5 mm, though it depends on the thickness of the flooring material body. If it is less than 3 mm, the soundproofing effect is inferior, and if it exceeds 5 mm, the absolute value of the distortion becomes large, and the walking feeling is deteriorated.

The method for manufacturing the wood-based soundproof floor material is not necessarily limited, but the wood 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)
A preferred manufacturing method is a method in which the and are integrally bonded via a flexible sheet, grooves are then formed, and a soundproof cushioning material is laminated.

[0024]

The present invention will be described in detail below with reference to examples. Example 1 A mat (thickness 4 mm, bulk density 0.04 g / 0.04 g / bulk) in which polyethylene-coated polypropylene fibers having a fiber diameter of 100 μm are uniformly dispersed in a three-dimensional network and heat-bonded without a binder at the crossing points of the fibers cm ³ , retention rate 20
%) As a buffer material.

In each case, a laminated body having a structure in which a 0.3 mm-thick wood board having an area of 90 mm × 900 mm, a 2.5 mm-thick plywood board, and a 0.3 mm-thick wood board were laminated and adhered in this order was used as a wood surface layer board. Using a foamed chloroprene rubber sheet with a thickness of 1 mm as a flexible sheet and a plywood plate with a thickness of 6 mm as a base plate, the sheets are laminated and integrated, and then a saw is used to cut the foamed chloroprene rubber sheet from the back surface with a vertical spacing of 45 mm. To form a groove portion having a width of 1.3 mm, and in the same manner, a groove portion having a width of 1.3 mm and having a width of 25 mm was formed on the entire surface in the same manner to produce a wood floor material (wood portion) having an area of 90 mm × 900 mm.

[0026] The back surface of the wooden floor material (the opposite side of the surface plate)
The cushioning material was bonded to the above with a cold pressure press using an EVA emulsion adhesive to prepare a wood-based soundproof flooring material. This wood-based soundproof floor material is applied to a reinforced concrete floor slab with a thickness of about 150 mm, acrylic double-sided adhesive tape # 50 manufactured by Nitto Denko Corporation.
7 was directly pasted and the soundproofing performance was measured according to "Measuring method of floor impact sound level at building site JISA-1418". Light weight floor impact sound level L _L number (d
B) was 41. In addition, the loading plate with a diameter of 50 mm
The amount of strain (amount of reduction in thickness) measured with a load of 0 kg was 0.6 mm.

Example 2 The same method as in Example 1 was applied to the back surface of a wood surface layer board in which a wood board having a thickness of 0.3 mm was laminated as a decorative board on a 9 mm thick plywood having an area of 90 mm × 900 mm, and a depth of 4. 65m
m, width of 1.3 mm, width of 25 m at intervals of 45 mm in length
Grooves with a width of 1.3 mm are formed on the entire surface at intervals of m and 90 mm ×
A 900 mm wood floor material was produced.

[0028] was subjected to the woody stuck to the floor material of the same buffer material of Example 1 in the same manner woody insulating floor members prepared similar test it as in Example 1, L _L number (DB) was 46 and the amount of strain was 0.6 mm.

Example 3 A mat (thickness: 3 mm, bulk density: 0) in which polyethylene-coated polypropylene fibers having a fiber diameter of 80 μm are uniformly dispersed in a three-dimensional mesh and adhesively molded at a crossing point of fibers by heat fusion without a binder. 0.03 g / cm ³ , retention rate 20
%) As a cushioning material, and a wooden soundproof flooring prepared by adhering to the same wooden flooring as in Example 2 was subjected to the same test as in Example 1. Table 1 shows the L _L number (dB) and the amount of strain.

Example 4 A mat (thickness: 5 mm, bulk density: 0) in which polyethylene-coated polypropylene fibers having a fiber diameter of 150 μm are uniformly dispersed in a three-dimensional mesh and adhesively molded at a crossing point of fibers by heat fusion without a binder. 0.06 g / cm ³ , retention rate 20
%) As a cushioning material, and a wooden soundproof flooring prepared by adhering to the same wooden flooring as in Example 2 was subjected to the same test as in Example 1. Table 1 shows the L _L number (dB) and the amount of strain.

[0031]

[Table 1]

Comparative Example 1 A mat formed by polyethylene-coated polypropylene fibers having a fiber diameter of 100 μm dispersed uniformly in a three-dimensional network and adhesively molded at the crossing points of the fibers by heat fusion without a binder (thickness: 4 mm, bulk density: 0). 0.07 g / cm ³ , retention rate 15
%) As a buffer material.

The cushioning material was adhered to the back surface (opposite side of the surface layer) of the wooden flooring material having the same structure as in Example 1 in the same manner as in Example 1 to obtain a wooden soundproofing floor material. When this wood-based soundproof flooring material was subjected to the same test as in Example 1, _LL
The number (dB) was 45 and the strain amount was 0.4 mm.

Comparative Example 2 Polyethylene-coated polypropylene fiber having a fiber diameter of 30 to 70 μm (fiber diameter 70 μm, 50% by weight, 53 μm)
A mat (thickness 4) in which 30% by weight of m and 30% by weight of 30 μm are uniformly dispersed in a three-dimensional mesh and heat-bonded without a binder at the crossing points of the fibers.
mm, bulk density 0.04 g / cm ³ , retention rate 33%) was used as the buffer material.

The above-mentioned cushioning material was adhered to the back surface (the side opposite to the surface plate) of the wooden flooring material having the same structure as in Example 1 in the same manner as in Example 1 to obtain a wooden soundproofing floor material. When this wood-based soundproof flooring material was subjected to the same test as in Example 1, _LL
The number (dB) was 46 and the strain amount was 1.2 mm.

Comparative Example 3 A wooden soundproof flooring material prepared by adhering the cushioning material used in Comparative Example 1 to a wooden flooring material having the same structure as in Example 2 was subjected to the same test as in Example 1. did. Table 1 shows the L _L number (dB) and the amount of strain.

Comparative Example 4 A wooden soundproof flooring material prepared by adhering the cushioning material used in Comparative Example 2 to a wooden flooring material having the same structure as in Example 2 was subjected to the same tests as in Example 1. did. Table 1 shows the L _L number (dB) and the amount of strain.

Comparative Example 5 A mat formed by polyethylene-coated polypropylene fibers having a fiber diameter of 177 μm uniformly dispersed in a three-dimensional network and adhesively molded at the crossing points of the fibers by heat fusion without a binder (thickness: 4 mm, bulk density: 0). 0.04 g / cm ³ , retention rate 10
%) As a buffer material.

The above-mentioned cushioning material was adhered to the back surface (the side opposite to the surface layer plate) of the wooden flooring material having the same structure as in Example 2 in the same manner as in Example 1 to obtain a wooden soundproofing floor material. This wooden soundproof flooring material was subjected to the same test as in Example 1. L _L number (d
B) and the amount of strain are shown in Table 1.

[0040]

EFFECTS OF THE INVENTION The wooden soundproof flooring material of the present invention has a simple structure, but as is clear from the results of the examples, it has an excellent soundproofing effect, a small amount of distortion, and a good walking feeling. It is extremely useful as a soundproof floor material.

[Brief description of drawings]

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

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

FIG. 3 shows a cross-sectional view of the wood-based soundproof flooring material of the present invention.

FIG. 4 is a view showing a cross section of the wood-based soundproof floor material of FIG.

[Explanation of symbols]

1 ... Wood surface plate 2 ... Flexible sheet 3
..Base plate 4 ..Groove 5 ..Cushioning material
6 ... Through hole

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Seiichi Yoshida 2805 Imafuku Nakadai, Kawagoe City, Saitama Central Glass Co., Ltd.

Claims (4)

[Claims] 1. A wooden soundproofing floor material comprising a wooden surface layer and a cushioning material forming both outer surfaces of a laminate, wherein the cushioning material has an apparent thickness of 3 to 5 mm and a bulk density of 0.03 to 0. 06 g / cm
It is ^3, and wood-based sound-insulating floor members which is a synthetic fiber mat of the three-dimensional network structure in which the fiber diameter is made from synthetic fibers of a single size of about 80 to about 150 [mu] m. 2. The wood-based soundproof flooring material according to claim 1, wherein the wood surface plate has a groove and / or a through hole on the back surface. 3. The wood-based soundproof floor material according to claim 1, wherein the wood surface layer board and the cushioning material are laminated and integrated through a base board having a groove and / or a through hole. 4. The wood-based soundproof flooring material according to claim 3, wherein the wood surface layer plate and the base plate are adhered via a flexible sheet.