JP3145024B2 - Wooden soundproof flooring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden sound-insulating flooring,
In particular, it relates to a wood-based sound-insulating flooring material that can be laid directly on the surface of a concrete slab or the like and has excellent soundproofing performance.

[0002]

2. Description of the Related Art Laying wooden flooring directly on a concrete slab or on a discarded plywood laid on a concrete slab has been conventionally performed as flooring construction. Many structures of wooden flooring materials have been proposed and used from the viewpoint of soundproofing or improvement of walking feeling.

[0003] For example, as shown in FIG.
1, a soft sheet 42 having a high specific gravity by filling a sheet-like material such as a rubber sheet, a synthetic resin sheet, or a synthetic resin foam sheet with a metal, an inorganic material, or the like, and a wood-based substrate 43 laminated and integrated. A wood flooring material formed by sticking a back cushioning material B such as a rubber sheet 45 on the back surface of a material A, wherein a cut groove 44 is provided in the substrate 43 and a rubber sheet 45 is provided.
The upper and lower surfaces have irregularities, that is, convex portions 4 projecting downward.
It has been proposed to form a concave portion 47 having a concave front surface corresponding to the six portions and a projecting portion 49 having a front surface protruding corresponding to the concave portion 48 on the rear surface (Japanese Patent Laid-Open No. 63-241264).
Reference).

[0006] As shown in FIG. 6, on a back surface of a wooden material 51, a vibration-proof sheet 52 made of the same material as the soft sheet and a perforated wooden board 53 are laminated to form a wooden base material A. FIG. 7 shows a structure in which a flat back cushioning member 54 made of a polyolefin foam, a rubber foam, or the like is adhered to the back as a back cushioning material B (see Japanese Utility Model Laid-Open No. 1-10144). As described above, a similar vibration-proof sheet 62 and a perforated wood board 63 are laminated on the back surface of a wood material 61 to form a wood-based substrate A, and on the back surface, a soft foam having a high foaming rate and a soft inside is hollow. There has been proposed a rubber foam back surface cushioning material 64 having a convex portion 65 and a convex portion 66 having a low foaming rate and a higher hardness on the back surface as a back surface cushioning material B (Japanese Utility Model Application Laid-Open No. HEI-5-205). -5988).

[0005]

The above-mentioned wood-based sound-insulating flooring material is bonded to the concrete slab surface with an adhesive. At this time, the wood-based sound-insulating flooring material is directly attached to the concrete slab surface. In this case, the adhesive infiltrates into the back cushioning material B and hardens, thereby deteriorating the sound insulation performance. Furthermore, the moisture contained in the concrete slab may pass through the back cushioning material and reach the wooden base material,
For this reason, the adhesive bonding the wooden base material and the back surface cushioning material may be adversely affected, causing adhesive peeling or swelling of the wooden base material to cause irregularities on the floor surface.

In order to prevent this, a synthetic resin film is previously adhered to the back surface of the back cushioning material B. However, when the material of the back cushioning material B is a synthetic resin foam sheet, the synthetic resin film and the synthetic resin film are bonded together. Of the synthetic resin foam sheet was insufficient, especially when the irregularities were provided on the back side of the synthetic resin foam sheet. The present invention aims to eliminate the inconveniences of the conventionally used wood-based sound-insulating floor materials as described above, and more specifically, a synthetic resin film with a high adhesive strength on the back side of the back cushioning material. It is intended to obtain a wood-based soundproof floor material that can be attached.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention basically provides a wood-based sound-insulating floor obtained by integrally laminating a wood-based base material and a back cushioning material. In the material, the back cushioning material is a synthetic resin foam sheet,
Disclosed is a wood-based soundproof flooring characterized in that a synthetic resin film is adhered to the back surface of a back surface cushioning material via a nonwoven fabric layer.

[0008]

According to the present invention, the wood-based soundproof flooring material of the present invention has an improved bonding strength between the two, because the synthetic resin film is adhered to the back surface of the back cushioning material with a non-woven fabric layer interposed therebetween, and peeling during or after construction. What happens is avoided. Furthermore, the moisture on the concrete slab surface does not reach the wooden base material of the flooring material, and the adhesive enters the concave portion of the back cushioning material when adhering to the concrete slab surface with an adhesive, thereby improving the sound insulation performance. It does not lower the sound insulation performance by lowering or hardening the adhesive by infiltrating the backside cushioning material.

[0009]

The present invention will be described below in more detail with reference to examples. FIG. 1 shows an embodiment of a wooden soundproof flooring according to the present invention. In the figure, reference numeral 1 denotes a wooden base material, on the back surface of which a back cushioning material 2 is laminated, and on the back surface, a synthetic resin film 4 is laminated with a nonwoven fabric layer 3 interposed therebetween.

The wood substrate 1 may be plywood, MDF (medium fiber board), particle board or the like. In this embodiment, one 5-ply plywood is used. Those having a thickness of about 6 mm to 12 mm are usually used. The wood substrate 1 is formed with a large number of non-penetrating grooves 11 at predetermined intervals from the back surface to the front surface. The cut grooves 11 are provided mainly for the purpose of reducing the rigidity of the wooden base material 1, and may be provided in the longitudinal direction, the lateral direction, or both directions. Also,
The interval may be about 10 mm to 20 mm, the width is about 2 mm to 5 mm, and the depth is 60 times the thickness of the wooden base material 1.
% To about 80% (in the case of 5-ply plywood, about 3 ply depth).

Further, the wooden base material 1 may be a single piece over the whole of the wooden soundproof flooring material, and a plurality of subdivided ones are collected and integrated into a predetermined size and shape. Is also good. Although not particularly shown, a decorative panel may be attached to the surface, and the surface decorative panel may be a conventionally-known wood-based soundproofing such as a decorative veneer or a laminated veneer laminated with a thin plywood. What is used for flooring can be used arbitrarily. Further, a groove may be provided in the longitudinal direction or lateral direction of the surface.

In this embodiment, the back cushioning material 2 is formed from a continuous foam type soft or semi-rigid synthetic resin sheet. As the resin type, polyurethane, vinyl chloride, polyvinyl alcohol, polyvinyl acetate, and the like can be used, and polyurethane is particularly preferable.

At the time of molding, for example, a polyurethane foam sheet is placed on a hot platen press having a large number of embosses on one hot platen surface or a flat platen hot plate press having a punching plate placed on one hot platen surface, It is compressed in a heated state by the hot platen press. Thereby, the back cushioning material 2 having a large number of convex portions 21 on one surface is formed. The molding method is not limited to this, and it can be molded by any method.

The back cushioning material 2 thus formed
Since the compression ratio differs between the portion where the convex portion 21 exists and the portion where the convex portion 21 does not exist, the low density portion and the high density portion are mixed. As a result, along with the reduction of vibration propagation from above to below due to the decrease in the ground contact area due to the contact of only the protrusions 21 with the concrete slab surface, as described later, for either short-term load or long-term load repeatedly, Thus, it is possible to obtain a wood-based sound-insulating flooring material which does not cause deterioration in sound insulation performance and sound insulation performance for a long time. In addition, the shape of the convex portion 21 can be sharply formed, and since the surface thereof is a flat surface, the adhesiveness to the nonwoven fabric 3 and the synthetic resin film 4 described later is also improved.

The amount of compression of a continuous foam type soft or semi-rigid synthetic resin sheet by a hot platen press, and the size and number of the projections 21 to be formed are determined according to the use environment of the wood-based sound-insulating floor material as a product. According to experiments performed by the present inventors, in the case of a polyurethane foam sheet, the foam sheet having a specific gravity of 0.025 to 0.05 and a thickness of about 6 mm to 9 mm can be set to 4 mm to 6 mm in the convex portion 21. Thickness, recess 22
When it is compressed so as to have a thickness of about 1 mm and the area of the projections is about 30% to 60% of the whole, it is possible to sufficiently provide a sound insulation effect as well as a cushioning effect. It has been found that it exhibits high resistance to any of the loads and can also reduce the occurrence of so-called "sags". The shape of the projection is not particularly limited, and may be any shape such as a circle, a diamond, a triangle, and a rectangle.

The non-woven fabric 3 may be made of polyester, nylon, rayon or the like, and has a basis weight of 20 g / m ^2.
６０60 g / m ² is preferred for reasons such as cost. The synthetic resin film 4 may be made of polyethylene, vinyl chloride, or the like, and preferably has a thickness of about 30 μm.

In the production of a wood-based sound insulating flooring material, preferably, a synthetic resin film with a nonwoven fabric is used, in which a nonwoven fabric 3 is previously adhered to a synthetic resin film 4.
The side is bonded to the tip of the projection 21 of the back cushioning material 2 using an adhesive such as EVA. Next, the flat surface side of the back cushioning material 2 is adhered to the back surface of the wooden base material 1 using an adhesive such as vinyl.

The wood-based sound-insulating flooring material produced in this manner is a simple plywood having no damping material such as a soft sheet in the intermediate layer as the wood-based substrate 1 as shown in an actual example described later. Even when used, a sufficient sound insulation effect can be obtained, and the manufacturing cost is greatly reduced. In addition, since the synthetic resin film 4 is adhered to the back surface, it is possible to prevent the moisture on the concrete slab surface from reaching the wooden base material 1 after laying. Further, when bonding to the concrete slab surface with an adhesive, the adhesive enters the concave portion of the back cushioning material 2 to lower the sound insulation performance. Can be avoided.

Further, the synthetic resin film 4 is used for the back cushioning material 2.
Although the synthetic resin film 4 and the tip of the convex portion 21 are bonded to each other with the nonwoven fabric 3 interposed therebetween, despite the fact that the synthetic resin film 4 is bonded only to the distal end portion of the convex portion 21, strong adhesion is obtained. There is no separation between the two during or after construction.

FIG. 2 shows another embodiment of the wooden soundproof flooring material according to the present invention. In this example, the wooden substrate 1
It is different from the wood-based soundproof flooring material shown in FIG. 1 in that a urethane sol coat 5 is provided between the backside cushioning material 2 and the flat side surface. Since the wood-based sound-insulating floor material is provided with the urethane sol coat 5, the adhesive for bonding the wood-based base material and the back cushioning material does not penetrate into the back cushioning material, and the sound insulation of the wood-based soundproofing floor material is improved. It has a unique effect of not impairing it.

FIG. 3 shows another embodiment of the wooden soundproof flooring according to the present invention. In this example, the same material as the back cushioning material 2 described with reference to FIG. 1 is attached to the wood-based base material 1 with its front and back reversed. Then, the same synthetic resin film 4 with the nonwoven fabric 3 as used in the above embodiment is attached to the back surface of the back cushioning material 2, that is, the flat surface, and the nonwoven fabric 6 is also provided between the back surface of the wooden base material 1 and the back cushioning material 2. And are bonded by an adhesive.

In this case, the adhesive strength of the synthetic resin film 4 to the back cushioning material 2 is further increased, so that the separation of the synthetic resin film 4 can be reliably prevented, and the wooden base material 1 and the back Since the contact area with the cushioning material 2 is reduced, the sound insulation effect is also improved. Further, the nonwoven fabric 6 is also interposed between the back surface of the wooden base material 1 and the back surface cushioning material 2 so that the adhesive strength between the two is strengthened, and the deterioration of the vibration and sound insulation performance due to the separation between the materials is avoided. it can. The adhesive strength between the wood material and the foam material by the adhesive is quite high, and the intended purpose can be achieved without the interposition of the nonwoven fabric 6.

FIG. 4 shows another embodiment of the wooden soundproof flooring according to the present invention. In this example, the back cushioning material 2
In addition to the protrusions 21 on the back side, the protrusions 23
This is different from the one shown in FIG. In this case, a space corresponding to the depth of the concave portion 22 of the back cushioning material 2 in the embodiment shown in FIGS. 1 to 3 is shared and secured by the concave portion 22a on the front surface and the space of the concave portion 23a on the rear surface. Therefore, the risk of material destruction due to overcompression of the foam sheet or a decrease in sound insulation performance can be eliminated. In forming the back cushioning material 2 of this shape, a hot plate press having a large number of embosses on both upper and lower hot plate surfaces or a flat plate hot plate press in which a punching plate is placed on both upper and lower hot plate surfaces is used. It can be easily molded using.

In the embodiment shown in FIG. 4, the shape of the projection 21 on the back side and the projection 23 on the front side of the back cushioning material 2 are different. Even if it is formed, the intended purpose can be achieved.

Actually, the following wood-based sound-insulating floor materials were prepared. As a wood base material, 7-ply 5-ply plywood 7
Using four pieces of 5 mm × 900 mm in a shape of a wild goose using hot melt, three-ply cut grooves were formed on the back surface. The kerf is 2mm wide and 6m deep
m and a pitch of 15 mm.

As a back cushioning material, a polyurethane foam sheet having a specific gravity of 0.032 and a thickness of 6 mm is hot-pressed by a hot-plate press having an emboss on one of the hot-plate surfaces, and the average diameter of the back surface is 1
The one having a total thickness of 4 mm was used so that the convex portion having a height of 0 mm and a height of 3.2 mm was about 50% of the entire area. An adhesive is applied only to the tip of the convex portion 21 of the back cushioning material, and a polyester non-woven fabric (30 g / m ² ) is adhered to a 40 μm polyethylene film by heat fusion. Pasted as material side.

Next, the flat surface side of the back cushioning material was adhered to the back surface of the above-mentioned wooden base material using a vinyl adhesive. The wooden soundproof flooring material was laid after applying a urethane adhesive to the surface of the concrete slab. During the laying operation, no peeling of the polyethylene film was observed, and the slab was able to closely follow the irregularities on the surface of the concrete slab and lay closely. After laying, JIS A1
According to the test specified in 418, a floor impact sound (light impact) was applied from the surface side, and the floor impact sound level was measured downstairs. The results showed good sound insulation as shown in FIG. 8A. In addition, in FIG. 8, B is the impact sound level of the 150 mm concrete slab surface.

Further, after a load of 4 kg / cm ² was continuously applied for 48 hours, the lightweight floor impact sound was measured in the same manner, but no particular difference was found in the impact sound level. This is because the back cushioning material compressed by the hot press has sufficient resistance to short-term repetitive load and long-term load, and so-called "sag" does not occur. It is presumed that the change in the physical properties was small.

After the test, the adhesion surface (the surface of the convex portion) between the wooden base material and the back cushioning material was observed, but no peeling occurred. Also, no peeling between the back cushioning material and the polyethylene film was observed. After being left for 7 days in that state, the wooden soundproof flooring material was taken out and broken, and the backside cushioning material was observed. As a result, no adhesive was applied to the concrete slab surface.

From the above test, the wood-based acoustic flooring material according to the present invention uses a simple plywood as a wood-based base material, but has a continuous foaming type foam such as a polyurethane foam sheet as a back cushioning material. By using a flexible or semi-rigid synthetic resin foam sheet that is thinned by hot pressing and has a large number of protrusions on one or both sides, the propagation of vibration from above to below is greatly reduced. You can see that there is.

Furthermore, since the back cushioning material has a low-density layer and a high-density layer, it exhibits high resistance to both short-term loads and long-term loads repeatedly, causing deterioration in sound insulation performance and sound insulation performance over a long period of time. Absent. In addition, the formation of the kerfs in the wooden base material allows the slab to closely follow the irregularities on the surface of the concrete slab during laying, prevent the floating from occurring, and contribute to the improvement of soundproofing.

Further, since the synthetic resin film is adhered to the back surface of the back cushioning material with a nonwoven fabric layer interposed therebetween, the adhesive does not penetrate into the back cushioning material side and does not lower the sound insulation performance. Further, the adhesive strength between the back cushioning material and the synthetic resin film is improved, and the occurrence of peeling is avoided.
Further, the production of the wood-based sound insulation floor material itself is low cost and easy.

[0033]

As is apparent from the above description, the wood-based sound-insulating flooring material according to the present invention is characterized in that the synthetic resin film is adhered to the back surface of the back surface cushioning material with a nonwoven fabric layer interposed therebetween. Does not penetrate into the back cushioning material side and does not lower the sound insulation performance, the adhesive strength between the back cushioning material and the synthetic resin film is improved, and the occurrence of peeling is avoided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a wooden soundproof flooring material according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the wooden soundproof flooring material according to the present invention.

FIG. 3 is a sectional view showing still another embodiment of the wood-based soundproof flooring according to the present invention.

FIG. 4 is a sectional view showing still another embodiment of the wood-based soundproof flooring material according to the present invention.

FIG. 5 is a cross-sectional view showing an example of a conventionally known wooden soundproof flooring material.

FIG. 6 is a sectional view showing another example of a conventionally known wooden soundproof flooring material.

FIG. 7 is a cross-sectional view showing still another example of a conventionally known wooden soundproof flooring material.

FIG. 8 is a graph showing test results defined in JIS A1418 for one embodiment of the wood-based soundproof flooring material according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wood base material, 11 ... Cut groove, 2 ... Back cushioning material, 21 ...
Convex part, 22 concave part, 3 nonwoven fabric, 4 synthetic resin film

Continuation of the front page (72) Inventor Takayuki Nishigaki 2-10-60 Hirabayashiminami, Suminoe-ku, Osaka-shi, Osaka Inside Eiji Sangyo Co., Ltd. (56) References JP-A-62-125158 (JP, A) 3-28256 (JP, U)

Claims (1)

(57) [Claims] 1. A wood-based soundproof flooring material obtained by laminating and integrating a wooden base material and a back cushioning material, wherein the back cushioning material is a synthetic tree.
A wood-based sound-insulating floor material, characterized in that the synthetic resin film is a fat foam sheet, and a synthetic resin film is adhered to the back surface of the back cushioning material via a nonwoven fabric layer.