JPH076274B2 - Soundproof flooring - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a soundproof flooring material, and particularly to a concrete surface or plywood or particle board whose surface is smoothed in order to reduce floor impact noise. The present invention relates to a wood-based floor material that is fixed to an underfloor material mainly by using an adhesive.

[Conventional technology]

Various methods have hitherto been devised to reduce the floor impact sound of condominiums and houses. In this case, floor impact sound is classified into heavy impact sound and light impact sound, but since the heavy impact sound is affected by the structure of the building itself, the light impact sound is a mitigation measure in terms of improving the floor finishing material. The alleviation of is exclusively aimed at.

It is effective to adjust the hardness of the floor surface finishing material to reduce the impact noise, and the softer the surface material, the higher the reduction effect. However, in the case of a wooden flooring material using a solid board or a natural wood decorative plywood, the surface cannot be softened because it is made of wood. Although it is possible to use relatively soft wood, it is easily scratched regardless of the presence or absence of surface coating, and the commercial value is low.

Therefore, conventionally, a method of dividing a wooden floor material into several layers and combining different materials has been used. At this time, as a material to be combined with a wood material such as plywood or particle board, a vibration damping sheet made of resin, a glass wool, rock wool, a foamed resin sheet such as polystyrene, a rubber cushion, a non-woven fabric, etc. are used.

Proposals for soundproof flooring materials using such sound insulation materials are disclosed in, for example, JP-A-62-125158, JP-A-62-253867, and Jitsukaisho.
As can be seen in each bulletin of 59-78436, the number is very large, and there are quite a few that are actually marketed as soundproof floor materials.

[Problems to be Solved by the Invention]

Conventionally, a sheet-like fiber material used in a soundproof floor material is expected to have an impact absorbing function utilizing friction resistance between fibers in the sheet, and is composed of generally commercially available fibers having a denier of about 6 to 15 denier. Nonwoven fabric is used. However, in the case of non-woven fabric, the larger the number of fiber denier used (the thicker the fiber), the smaller the amount of fiber per constant weight and the lower the contact ratio between fibers, which reduces the floor impact sound expected of non-woven fabric. Since the effect, that is, the effect of converting the impact energy into heat energy by the friction between the fibers to reduce the floor impact sound is weakened, conventionally, it has been attempted to enhance the effect of reducing the floor impact sound by increasing the thickness of the nonwoven fabric. However, as the thickness of the non-woven fabric increases, the amount of compressive deformation of the non-woven fabric increases, and as a result, the floor material sinks significantly when walking on the floor material, and the pedestrian feels fluffy, and the wooden floor It had significantly reduced the commercial value of the material.

Therefore, it is an object of the present invention to provide a flooring material that exhibits a small amount of compressive deformation in a laminated wood-based floor and that exhibits an excellent effect of reducing a lightweight impact sound.

[Means for Solving the Problems]

The present inventors have conducted research to solve the above problems, and by effectively utilizing the frictional resistance of the fibers in the sheet to convert impact energy into heat energy, impact absorption without utilizing elasticity. We have found a floor material that can effectively reduce the floor impact sound by using a sheet with the function of.

That is, the present invention, in a wood flooring material having a wood material layer and a sound insulation layer, the fineness of the fiber is 0.1 denier or more, constituted by using ultrafine fibers less than 3.0 denier, the thickness of 0.5 ~ 2.0 mm non-woven fabric A sound-insulating flooring material comprising a sound-insulating material layer made of the following fiber sheet.

Hereinafter, the present invention will be described in detail.

The present invention is a wood-based soundproof flooring material having a wood material layer and a sound insulation material layer, and as the surface wood material layer and the intermediate wood material layer, solid wood, plywood, perforated plywood, particle board, medium density fiber board, cork A general wooden material such as a board, a wood powder board, or a laminated bamboo board, or a material having a decorative board attached to the surface thereof, if necessary, is appropriately selected and used.

In the flooring material of the present invention, as the sound insulating material layer between the surface wood material layer and the intermediate wood material layer, the fineness of the fiber is 0.1 denier or more, and is constituted by using ultrafine fibers of less than 3.0 denier,
A fiber sheet made of non-woven fabric having a thickness of 0.5 to 2.0 mm is used. This fiber sheet can be produced by a conventionally known method for producing a nonwoven fabric, such as a needle punching method, a spun bond method, or a papermaking method, but the energy of floor impact sound is generated by friction heat generated by friction between fibers. The needle punching method is preferable because it can easily achieve the object of the present invention of converting into and absorbing.

The fiber sheet has an ultrafine fiber constituting the sheet of 0.1
It must be greater than or equal to denier and less than 3.0 denier,
0.5-1.5 denier is preferred. The use of ultrafine fibers of less than 0.1 denier is costly, and the fibers are too thin to be easily cut by needle punching, which makes it difficult to produce a nonwoven fabric. If it is 3.0 denier or more, the porosity of the fiber sheet increases and the amount of compressive deformation increases, and it is necessary to increase the basis weight in order to increase the frictional force between fibers, resulting in an increase in the sheet thickness. This causes the amount of compressive deformation to increase.

Further, the thickness of the fiber sheet is required to be 0.5 to 2 mm, but preferably 0.8 to 1.5 mm. Thickness is 0.
When the thickness is less than 5 mm, the adhesive used for lamination is likely to be impregnated into the fiber sheet, which is not desirable in production, and when impregnated with the adhesive, friction between the fibers does not occur and the soundproof performance is adversely affected. Further, when the thickness of the fiber sheet exceeds 2 mm, the soundproofing effect is improved due to the expression of elasticity and the increase in the amount of fibers due to the increase in thickness, but due to the increased thickness, even ultrafine fibers of less than 3.0 denier were used. Even so, the amount of compressive deformation increases to the extent that there is no difference from a non-woven fabric composed of general 3 to 4 denier fibers, and the walking feeling is deteriorated, which is not preferable.

Furthermore, the basis weight of the fiber sheet is preferably such that the frictional force between the fibers can be expected, but since the basis weight also varies depending on the thickness of the sheet, the thickness of 0.5 to 2 mm. In the sheet, the basis weight for which the frictional force between the fibers can be expected is 50 to 300 g / m ² , preferably 130 to
It is 250 g / m ² . The material of the ultrafine fibers constituting the fiber sheet is not particularly limited, and examples thereof include nylon, polyester, polypropylene and the like. Further, since friction between fibers is expected, it is desirable to suppress addition of a resin that is a binder often used in manufacturing this type of non-woven fabric as much as possible.

In the present invention, in addition to natural wood decorative plywood, a sheet having the extremely thin fibers as described above is combined with wood materials such as conventionally used particle boards and medium specific gravity fiber boards, vibration damping sheets, non-woven fabrics, etc. Consists of floor material.

For example, as shown in FIG. 1, the flooring material of the present invention comprises a plywood 1 as a surface wood material layer and a perforated plywood 2 as an intermediate wood material layer having a fiber fineness of 0.1 as a soundproof material layer. Made of ultrafine fibers of denier or more and less than 3.0 denier,
A fiber sheet 3 made of a non-woven fabric having a thickness of 0.5 to 2.0 mm is laminated, and a fiber sheet 4 as a soundproof material layer is further laminated on the back surface of the perforated plywood 2. The fiber sheet 4 provided on the back surface of the perforated plywood 2 does not necessarily have to be the same as the fiber sheet 3 described above. Moreover, what is shown in FIG. 1 is only one configuration example of the present invention, and the present invention is not limited to this. That is, although the present invention is basically based on the wood material layer and the sound insulation material layer, any other layer may be added thereto. For example, as described above, it may be combined with a layer such as a vibration damping sheet or a non-woven fabric, or a layer of another sound insulating material, and in that case, the combination of each layer is arbitrary. Another layer may be interposed between the wood material layer and the sound insulation material layer.

As the surface wood material layer, a wood material to which natural wood is pasted or a processed material thereof is used if necessary. Further, each layer needs to be fixed to each other with an adhesive, a pressure-sensitive adhesive, a double-sided tape or the like.

[Action]

The flooring material of the present invention uses a fiber sheet made of a non-woven fabric of a specific thickness made of extremely fine fibers as a sound insulating material layer, so that the fiber sheet is slightly compressed by an impact force applied in a direction perpendicular to the wood material layer on the floor material surface. At this time, friction occurs between the ultrafine fibers that form the fiber sheet, and the impact energy applied to the floor material is converted into thermal energy due to the friction between the fibers. As a result, the impact force is reduced.

〔Example〕

 Hereinafter, the present invention will be described in more detail with reference to examples.

The materials used in Examples and Comparative Examples are as follows.

1. JIS ordinary plywood: thickness 3 mm 2. Perforated plywood: JIS ordinary plywood with 5 mm diameter holes at 3 cm intervals 3. Fiber sheet: used in the present invention. Thickness 1 mm, polyester fiber 1.5 denier, basis weight 175 g / m ² 4. Nonwoven fabric (1): thickness 6 mm, 3 denier, basis weight 600 g / m ² , polyester fiber 5. Nonwoven fabric (2): thickness 4 mm 3 denier, weight 400g /
m ² , polyester fiber 6. Non-woven fabric (3): thickness 2 mm, 3 denier, basis weight 200 g /
m ² , polyester fiber 7. Foam sheet: Polyurethane, 15 times foam, thickness 1mm JIS A1
418 Measurement is performed with a tapping machine in accordance with "Measuring method of floor impact sound level at construction site". Octave band center frequency that clearly shows the impact noise reduction effect
Table 1 shows the measured values at 125 Hz and 250 Hz.

[Advantages of the Invention] According to the present invention, it is possible to provide a wood flooring material that exhibits an excellent effect of reducing a light-weight floor impact sound, and it is possible to provide an excellent effect which has not been obtained as a soundproofing floor material. It is something to demonstrate.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention. 1 ... Plywood, 2 ... Perforated plywood, 3 ... Fiber sheet, 4 ...
… Nonwoven fabric

Claims (2)

[Claims] 1. A wood flooring material having a wood material layer and a sound insulation material layer, which is composed of ultrafine fibers having a fiber fineness of 0.1 denier or more and less than 3.0 denier and a thickness of 0.5 to 2.0 mm. A soundproofing flooring material characterized by using a fibrous sheet made of non-woven fabric for the sound insulating material layer. 2. A fine fiber having a fineness of 0.1 denier or more and less than 3.0 denier and a thickness of 0.5 to 2.0.
The weight of the fiber sheet made of non-woven fabric of 50 to 300 g / m
The soundproof flooring material according to claim 1, which is ² .