JPH06200614A - Sound-insulating floor material - Google Patents

Abstract

PURPOSE:To obtain a sound-insulation floor member with an innovative construction, which is excellent in the sound-insulation effect and also in the walking feeling. CONSTITUTION:In a sound-insulating floor member in which a buffer sheet member 3 is stuck as a laminate through a nonwoven fabric 2 on the rear side of a floor base plate 1, a plurality of protrusions 4a, 4b are formed at both the surface and the rear of the buffer sheet member. And spaces 6 are formed between the buffer sheet member and the nonwoven fabric on the surface side and also between the buffer sheet member and the floor substrate on the rear respectively. It is preferable to form the protrusions 4a, 4b at the different positions on the surface and rear sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material, and more particularly to a soundproof floor material which is used in an upper floor portion of a house to prevent a solid sound from propagating downstairs due to an impact on the floor surface.

[0002]

2. Description of the Related Art As a soundproof flooring of this type, for example, a soft high foaming layer having a foaming ratio of 3 to 10 times and a soft low foaming ratio of 1.5 to 3 times having an embossed surface are formed on the back surface of the flooring body. One in which a foam layer and a foam layer are sequentially laminated (Actually published No. 50-49917)
(See Japanese Patent Laid-Open Publication No. 6), or a structure in which a sound-insulating foam made up of a plurality of layers is adhered to the entire lower surface of a wooden board, and the foaming ratio of the sound-insulating foam in the adjacent layers is different (Actual Development Sho 61)
No. 473339).

In these soundproof flooring materials, a foam is used as a cushioning material, and the foam is subjected to impact to be compressed or deformed, so that the collision time becomes long during the deformation, resulting in a change in momentum or impulse. Even if the time integral value of the impact force is constant, the peak value of the impact force and the impact natural frequency can be reduced, the impact input energy to the substrate can be reduced, and thus the sound and vibration due to the impact can be reduced. .

Further, when a cushioning material such as such a foam is bonded to the back surface of the flooring material, the shock energy is absorbed by the expansion and contraction deformation of the cushioning material caused by the bending vibration of the flooring material, thereby providing a cushioning effect.

[0005]

In order to exert a sufficient soundproofing effect in these conventional soundproofing floor materials, it is necessary to appropriately set the thickness ratio of the flooring material and the cushioning material, and generally, the cushioning material is used. Is required to be 2 to 3 times as thick as the floor material.

However, when the thickness of the cushioning material is set in this way, the flexure of the floor material itself becomes large, and the real part of the floor material is damaged or the real part is uneven.

Further, since the cushioning material is too soft,
If the feeling of walking when walking on the floor deteriorates, and if a heavy load such as a piano, refrigerator, or furniture is placed on the floor material and a concentrated load is applied to the floor material, the cushioning material will be compressed, and the cushioning effect will be significant. Will fall to.

Furthermore, when such a large load is applied for a long period of time, the cushioning material itself has a weak restoring force, so that the floor surface is corrugated, and a step is generated at an abutting portion with an adjacent floor material. was there.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves these problems of the prior art all at once, and provides a new soundproof flooring material which is excellent in soundproofing effect and does not cause practical inconvenience. It was completed as a result of diligent efforts for the purpose of using a non-woven fabric on the back surface of the floorboard substrate and laminating and adhering sheet-like cushioning materials with multiple convex portions formed on both front and back surfaces. And

As the floor material substrate, an arbitrary plate-shaped body such as plywood, fiber board, particle board, and sawn wood is used. The substrates may be used alone or in any laminate.
In the case of a laminated plate, an elastic sheet (a sheet of rubber, synthetic resin or the like, a foamed sheet thereof, a non-woven fabric or the like) can be interposed.

A plurality of slits or holes of arbitrary depth are formed on the back surface of the flooring substrate, if necessary.

Further, on the surface of the substrate, if necessary, printing of a pattern, sticking of veneer, sticking of synthetic resin or synthetic resin foam decorative sheet, sticking of decorative paper or synthetic resin impregnated decorative paper or decorative synthetic paper, etc. Optional makeup is applied.

Actual processing such as phase-determination processing and actual processing can be applied to the opening of the substrate.

The sheet-like cushioning material laminated and adhered to the back surface of such a substrate through a non-woven fabric is made of rubber, synthetic resin,
It is formed by a sheet material such as asphalt or a foamed sheet material thereof. For example, it is composed of a ring-opening polymerization monomer (norbornene monomer) composed of ethylene and cyclopentanediene.

The hardness of the buffer material is preferably about 30 to 65 degrees. When it is less than 30 degrees, when it is constructed as a floor, sinking is likely to occur due to the load of heavy objects such as piano, refrigerator, furniture, etc. On the other hand, when it is rigid such as more than 60 degrees, the energy of impact force is Absorption is not sufficient, reducing the soundproofing effect.

The projections formed on both the front and back surfaces of the cushioning material are generally integrally formed with a circular cross section.
The shape is not limited, for example, a polygonal columnar shape having a cross-sectional shape such as a square or a trapezoid, a truncated cone or a pyramid shape,
The shape may be a hollow cylinder or a rectangular tube.

In the present invention, an excellent soundproofing effect is obtained by using such a cushioning material having a plurality of convex portions formed on each of the front and back surfaces. The reason for this is considered as follows. To be

By the way, the mechanism by which the solid sound acting on the floor material is particularly perceived by humans downstairs is that the source transmits it to the floor material as solid vibration, propagates in the floor material as vibration, and finally air It is perceived by human hearing as a result of being emitted as sound inside or transmitted as vibration to the human body directly. In order to prevent solid sound in this propagation system, buffering, that is, absorbing impact energy. ,
And damping, i.e. absorbing vibrational energy,
There are two factors to consider.

First, considering buffering, the impact energy applied to the floor surface (floor material substrate) is propagated to the nonwoven fabric bonded to the back surface thereof. The non-woven fabric performs the first damping by a shock absorbing effect of the impact energy due to the subduction of the non-woven fabric itself.

Then, the sheet-shaped cushioning material further joined to the back surface is propagated from the convex portion on the front surface side to the convex portion on the back surface side, but the contact area with the substrate is small, and therefore the expansion / contraction deformation per unit area is performed. Since the amount is large, the cushioning effect is improved as compared with the case where the sheet-shaped cushioning material is adhered to the entire surface of the substrate without providing the convex portion. Further, by providing the convex portions, when impact energy is received, the convex portions are bent, so that the amount of deformation becomes larger and the viscoelasticity of the sheet-shaped cushioning material itself is effectively exhibited. Further, since the deformation amount of the sheet-shaped cushioning material is increased in this way,
The impact time will be that much longer.

As a combined action of these, the second damping of the impact energy is carried out very efficiently and a remarkable buffering effect is obtained.

Next, regarding damping, the intermolecular friction energy during which the applied vibration energy propagates through the material,
In other words, it is achieved by converting it into heat energy and attenuating it, but since it propagates through countless fibers in the non-woven fabric, the propagation distance of vibration energy becomes long and conversion to heat energy is performed efficiently. Be seen. Also,
Even in the sheet-shaped cushioning material, conversion into heat energy is performed during propagation in the material, and since the convex portions are formed on both front and back surfaces of the sheet-shaped cushioning material, the vibration energy is correspondingly increased. The propagation distance of is increased, and the conversion into heat energy is efficiently performed.

In particular, when the convex portion on the front surface side and the convex portion on the rear surface side of the sheet-shaped cushioning material are formed at different positions, the bending between the convex portions formed at different positions on the front and back surfaces is further improved. It becomes larger and more effectively absorbs impact energy, and since the propagation of vibration energy is performed through a zigzag path, the propagation distance becomes longer and a significant improvement effect on vibration damping is also obtained. To be

Further, it is formed between the back side (nonwoven fabric) of the floor board and the front side convex portion of the sheet-like cushioning material, and between the back side convex portion of the sheet-like cushioning material and the floor base. Since the space portion functions as a sound absorbing chamber, the soundproofing effect is further improved.

When the convex portion of the sheet-shaped cushioning material is formed into a hollow cylinder or a rectangular tube, the hollow portion of the convex portion is closed by the substrate to form a sealed space, which serves as a sound absorbing chamber and at the same time an air cushion. It also plays the role of, and the soundproofing effect can be further enhanced.

A vibration-damping sheet (also called a sound-insulating sheet) or an elastic sheet may be further attached to the back surface side of the sheet-shaped cushioning material, and the sheet-like cushioning material may be adhered to the floor base through these sheet materials.

The vibration-damping sheet generally contains synthetic rubber and synthetic resin as main components, for example, ethylene-propylene rubber (E
PDM) and has a rubber hardness of about 60 to 80 degrees, and by mixing a heavy substance such as iron powder or iron oxide powder,
Some have a mass of 1.2 or more to further improve sound insulation. Such a damping sheet
It absorbs vibrational energy to enhance the soundproofing effect and provides tensile strength that resists bending of the entire floor material as a composite.

The elastic sheet may have a foaming ratio of 3 to, for example.
It is a 30-fold polyolefin foam that absorbs vibration energy as a second cushioning material, prevents or absorbs the occurrence of unevenness, and exerts effects such as giving a proper walking feeling through its elasticity.

By interposing these sheet materials between the sheet-shaped cushioning material and the floor base such as concrete, the adhesiveness can be improved.

[0030]

[Function] Since the sheet-shaped cushioning material having a plurality of convex portions on both front and back sides is laminated and adhered to the back surface of the floor board substrate through the nonwoven fabric, both shock energy and vibration energy are efficiently absorbed. , Exerts excellent soundproofing effect.

[0031]

1 and 2 show an embodiment of a soundproof flooring material according to the present invention, in which a substrate 1 optionally coated with makeup is applied.
The sheet-shaped cushioning material 3 is attached to the back surface of the sheet via the nonwoven fabric 2.

A plurality of convex portions are formed on both front and back surfaces of the sheet-shaped cushioning material 3. In the illustrated embodiment, the positions where the convex portions are formed are displaced on the front and back surfaces of the cushioning material 3 without being coincident with each other, that is, the convex portion 4a on the front surface side and the convex portion 4b on the rear surface side are in the cross section of the cushioning material. They are arranged in a zigzag pattern without linear alignment (see FIG. 2 in particular).
reference). The cushioning material 3 is the convex portions 4a and 4 on the front and back surfaces.
Since it is bonded to the non-woven fabric 2 and the floor base 5 via b, a space portion 6 that functions as a sound absorbing chamber is formed between them.

In order to confirm the soundproofing effect of the flooring material of the present invention, a test was conducted in the following manner.

1818 mm × 2727 mm, thickness 150
Various specimens of the same size were placed on a concrete floor plate of mm, and a light impact test by a tapping machine and a heavy impact test by a bang machine were performed with the center of the upper surface of the specimen as an impact point.

As a test body, (A) a norbornene monomer (a tensile strength of 7 kg / cm ²⁾ which is a ring-opening polymerization monomer composed of ethylene and cyclopentanediene, was formed on the back surface of a base material of a laminated wood veneer having a thickness of 6 mm. (At room temperature), 10% compressive strength 1.2 kg / cm ² , rubber hardness 53 degrees) A sheet-shaped cushioning material having a plurality of convex portions each having a height of 2.5 mm formed on both front and back sides having a thickness of 1 mm, and (B) On the back surface of the base material of the same laminated wood veneer, two layers each made of a polyolefin resin foam and having an expansion ratio of 10 times and 20 times were adhered and laminated in a thickness of 3 mm, respectively.

The test results for these two types of test bodies are shown in the graph of FIG. In this graph, the result of the light impact test of the test body (A) is shown by ○-○, the result of the heavy impact test is shown by ●-●, and the result of the light impact test of the test body (B) is △ ... △, heavy. The results of the impact test are indicated by ▲… ▲.

As is apparent from this graph, in the test body (A) which is the material of the present invention, the L-
While the level of 55 was satisfied, the test material (B), which is a comparative material, remained at a level much lower than this, and especially in the light impact test close to the impact sound that frequently occurs in general life. The result is below the level of L-60.

From the above test results, it was confirmed that the flooring material of the present invention exhibits a very remarkable soundproofing effect.

Further, on the back surface of the sheet-shaped cushioning material of the test body (A), "SR-113" having a hardness of 70 degrees as a vibration damping sheet
0 "(Saitama Rubber Industry Co., Ltd.), and 10% compressive strength of 1.2 kg / cm ² as an elastic sheet in place of the vibration damping sheet, and tensile strength of 7.0 kg at room temperature
/ Cm is ² with those bonded "Lion board F grade" a (Lion Corporation), was subjected to the same test, in any case in the light impact test 63
In the octave band center frequency of ˜500 Hz, a result that is 1 to 2 dB better than that of the test body (A) was obtained.

Therefore, it was confirmed that the soundproofing effect is further improved by adhering these damping sheets or elastic sheets.

[0041]

According to the present invention, a floor material having an extremely excellent soundproofing effect can be obtained, and the floor material has a simple structure.
It can be manufactured at low cost using materials that are commercially available in the past.

Further, since the sheet-shaped cushioning material used for the flooring material of the present invention has an appropriate hardness, it does not give an unpleasant walking feeling when used as the flooring material.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a construction state showing a structure of a soundproof flooring material according to an embodiment of the present invention.

FIG. 2 is a plan view of the soundproof flooring material of FIG.

FIG. 3 is a graph showing the test results of the soundproofing effect of the soundproofing flooring material of the present invention compared with the comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Nonwoven fabric 3 Sheet-shaped cushioning material 4a Convex portion on front surface side 4b Convex portion on rear surface side 6 Space portion

Claims (4)

[Claims] 1. A soundproof flooring material, comprising: a non-woven fabric interposed on the back surface of a floor board substrate; and a sheet-shaped cushioning material having a plurality of convex portions formed on each of the front and back surfaces thereof. 2. The soundproof flooring material according to claim 1, wherein the positions of the convex portions on the front and back surfaces of the sheet-shaped cushioning material are different on the front and back surfaces, respectively. 3. The soundproof flooring material according to claim 1, wherein a damping sheet is further laminated on the back surface of the sheet-shaped cushioning material. 4. The soundproof flooring material according to claim 1, wherein an elastic sheet is further laminated on the back surface of the sheet-shaped cushioning material.