JPH07331852A - Wooden soundproof floor material - Google Patents

Abstract

PURPOSE:To obtain a wooden soundproof floor material which is excellent in a soundproof function and which can be directly laid down on the surface of concrete slab or the like. CONSTITUTION:In a wooden soundproof floor material, in which a wooden base material 1 and a buffering material 2 at the rear face are laminated as a unit, cut grooves 11 are formed at the rear face of the wooden base material 1. A continuously foaming type flexible or half-rigid synthetic resin foam sheet is made thin with compression of a hot press and at the same time a number of protrusions 21 are formed on one face or both faces, in the buffering material at the rear face. A synthetic resin film 4 is stuck at the rear surface of the buffering material of the rear face through a non-woven fabric layer 3.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a wood-based soundproof flooring material,
In particular, the present invention relates to a wood-based soundproof floor material that can be directly laid on the surface of a concrete slab and has excellent soundproofing performance.

[0002]

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

For example, as shown in FIG. 5, a wooden decorative board 4
1. A wood-based substrate in which a sheet-like material such as a rubber sheet, a synthetic resin sheet, or a synthetic resin foamed sheet is filled with a metal, an inorganic material, or the like to have a high specific gravity and a wood-based substrate 43 are laminated and integrated. A wooden flooring material formed by adhering a back surface cushioning material B such as a rubber sheet 45 to the back surface of the material A, in which a kerf 44 is provided on the substrate 43 and the rubber sheet 45
The front and back surfaces are uneven, that is, the convex portion 4 protruding downward.
It has been proposed to form a concave portion 47 having a concave surface side corresponding to the six portions and a projecting portion 49 having a convex surface side corresponding to the concave portion 48 on the back surface (Japanese Patent Laid-Open No. 63-241264).
(See the official gazette).

Further, as shown in FIG. 6, a vibration damping sheet 52 made of a material similar to the soft sheet and a perforated wood board 53 are laminated on the back surface of the wood material 51 to form a wood base material A. FIG. 7 shows a structure in which a flat backside cushioning material 54 made of a polyolefin-based foam, a rubber-based foam or the like is attached as a backside cushioning material B on the back surface thereof (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 the wood material 61 to form a wood-based base material A, and the back surface thereof has a high foaming rate and a soft interior with a hollow interior. A backside cushioning material B made of a rubber foam having a convexity portion 65 and a convexity portion 66 having a low foaming rate and a higher hardness on the backside is adhered as the backside cushioning material B (actual plan 5). -5988).

[0005]

Although each of the wooden soundproof flooring materials having the above-mentioned structure is effective in reducing the propagation of sound from the upper floor to the lower floor, the purpose is to enhance the soundproofing or sound insulating effect. Therefore, all of them are premised on the use of the wood-based base material A with a soft sheet such as a rubber sheet or a synthetic resin foam sheet interposed in the middle, which is costly.

Further, as disclosed in Japanese Unexamined Patent Publication No. 63-241264, a structure in which a kerf is provided on a substrate has an advantage that it can follow irregularities on the surface of a concrete slab, but has a complicated structure and From the viewpoint of soundproofing, there is still room for improvement. As shown in Japanese Utility Model Application Laid-Open No. 1-10144, in the case where a flat back surface cushioning material is adhered to the back surface of the base material, since the cushioning sheet in contact with the concrete slab surface is flat and the contact area is wide, the vibration transmission It has the inconvenience that the reduction is limited to some extent. Further, in the one disclosed in Japanese Utility Model Laid-Open No. 5-5988, a back cushioning material made of a rubber foam having a convex portion having a different shape and a different expansion ratio is used as the back cushioning material attached to the back surface in order to eliminate the disadvantage. However, in this case, it cannot be denied that it is difficult to manufacture the rubber foam back cushioning material.

Further, the wooden soundproof floor material as described above is adhered to the concrete slab surface via an adhesive. At that time, if the wooden soundproof floor material is directly arranged on the concrete slab surface, When the backside cushioning material B is soaked with the adhesive and cured, the sound insulation performance is deteriorated. Furthermore, the moisture contained in the concrete slab may reach the wood-based base material through the back surface cushioning material, which adversely affects the adhesive bonding the wood-based material and the back surface cushioning material. In some cases, adhesion and peeling may occur, or the wood-based substrate may swell to cause unevenness on the floor surface.

In order to prevent this, a synthetic resin film is attached to the back surface side of the back surface cushioning material B in advance. However, when the material of the back surface cushioning material B is a synthetic resin foam sheet, a synthetic resin film is used. The adhesive property was not good, and it was insufficient especially when the back surface side of the synthetic resin foam sheet was provided with irregularities.

An object of the present invention is to eliminate the inconveniences of the above-described conventional wood-based soundproof flooring materials. More specifically, while having sufficient sound insulation,
To obtain a wood-based soundproof flooring material that can be easily manufactured at low cost, at the same time can easily follow the irregularities of a concrete slab, and that has high resistance to repeated short-term loads and long-term loads. With the goal. A further object of the present invention is to obtain a wood-based soundproof flooring material capable of adhering a synthetic resin film on the back surface side of the back surface cushioning material with high adhesive strength.

[0010]

In order to solve the above-mentioned problems and to achieve the object, the present invention is basically a wood-based soundproof floor in which a wood-based base material and a back cushion material are laminated and integrated. In the material, the wooden base material has a groove formed on its back surface, and the back surface cushioning material is a continuous foam type soft or semi-rigid synthetic resin foam sheet that is thinned by compression by heat pressing and at the same time one side or A wooden soundproof flooring characterized in that a large number of convex portions are formed on both sides and a synthetic resin film is attached to the backside of the backside cushioning material with a nonwoven fabric layer interposed. Disclose.

[0011]

[Working] The wood-based soundproofing flooring material according to the present invention has a continuous foaming type soft or semi-rigid synthetic resin sheet as a cushioning material on the back side, which is compressed by hot pressing to reduce its thickness and at the same time, a large number of convex portions are formed on one or both sides. It has good sound insulation and sound insulation, and shows high resistance to repeated short-term loads and long-term loads.
Does not cause deterioration of sound insulation performance and sound insulation performance over a long period of time.

Further, even when a simple wooden board having no intermediate layer such as a soft sheet is used as the wooden base material, it is possible to obtain a floor material having excellent soundproofing property. It can be manufactured at a low cost in comparison. Further, by forming the cut grooves in the wood-based material, it is possible to follow the irregularities on the surface of the concrete slab well and prevent the occurrence of floating or the like.

Further, since the synthetic resin film is adhered to the back surface of the back cushioning material, the adhesive strength between the two is high and peeling during or after construction is avoided.
Furthermore, the moisture on the concrete slab surface does not reach the wood-based base material of the flooring material, and when the concrete slab surface is bonded via an adhesive, the adhesive enters the concave part of the back surface cushioning material and the sound insulation performance is improved. Also, the sound insulation performance is not deteriorated by lowering the sound absorption property and hardening the adhesive by soaking the adhesive in the back surface cushioning material. Further, when the wood-based base material and the back surface cushioning material are adhered with the non-woven fabric interposed, the adhesive strength between them is further improved, and the deterioration of the sound insulation performance due to peeling can be avoided.

[0014]

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

The wood-based material 1 may be plywood, MDF (medium fiber board), particle board, etc. In this embodiment, one 5-ply plywood is used. The thickness thereof is usually about 6 mm to 12 mm. A large number of kerfs 11 that do not penetrate are formed at a predetermined interval from the back surface to the front surface side of the wooden board 1. The cut groove 11 is provided mainly for the purpose of reducing the rigidity of the wood-based material 1, and may be provided in the longitudinal direction, the lateral direction, or both directions thereof. 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 wood-based substrate 1.
% To about 80% (in the case of 5 ply plywood, a depth of about 3 plies) is preferable.

The wooden base material 1 may be a single piece over the entire wooden soundproof flooring material, or a plurality of small pieces are gathered together and accumulated in a predetermined size and shape. Good. Although not particularly shown, a decorative board may be attached to the surface, and as the decorative surface board, a conventionally known wood-based soundproofing material such as a decorative veneer or a laminate of thin plywood on a decorative veneer is used. What is used for a floor material can be used arbitrarily. Further, a groove may be provided on the surface in the longitudinal direction or the lateral direction.

The back cushion material 2 is formed from a continuous foaming type soft or semi-rigid synthetic resin sheet. As the resin type, polyurethane, vinyl chloride, polyvinyl alcohol, polyvinyl acetate, etc. 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 on a flat plate-like hot platen press having a punching plate mounted on one hot platen surface,
The hot platen press is compressed in a heated state. Thereby,
The back cushion material 2 having a large number of convex portions 21 on one surface is molded. The molding method is not limited to this, and any method can be used.

Back cushioning material 2 molded in this way
Since the compressibility 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, with the reduction of the vibration propagation from the upper side to the lower side due to the reduction of the ground contact area due to the contact of only the convex portion 21 with the concrete slab surface, as will be described later, it is repeatedly applied to the short-term load or the long-term load. A wood-based soundproofing flooring material that exhibits high resistance and does not cause deterioration of soundproofing performance and soundproofing performance over a long period of time can be obtained. Further, 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 the continuous foaming type soft or semi-rigid synthetic resin sheet in the hot plate press, the size and number of the convex portions 21 formed, etc., depend on the environment in which the wood-based soundproof floor material is used. Although it can be set as appropriate, according to the experiments by the present inventors, in the case of a polyurethane foam sheet, a foam sheet having a specific gravity of 0.025 to 0.05 and a thickness of 6 mm to 9 mm is used in the convex portion 21 at 4 mm to 6 mm. Thickness, recess 22
When it is compressed to a thickness of about 1 mm and the convex area is set to about 30% to 60% of the whole, it can exert a sufficient sound insulation effect as well as a cushioning effect. We have found that they exhibit high resistance to any of the loads and can reduce the occurrence of so-called "sag". The shape of the convex portion is not particularly limited and may be any shape such as a circle, a rhombus, a triangle, and a quadrangle.

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.
-60 g / m ² is preferable 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 wood-based soundproof flooring, preferably,
A synthetic resin film with a non-woven fabric in which the non-woven fabric 3 is adhered to the synthetic resin film 4 in advance is used, and the non-woven fabric 3 side is E
An adhesive such as VA is used to attach the back surface cushioning material 2 to the tip of the convex portion 21. Next, the flat surface side of the back surface cushioning material 2 is attached to the back surface of the wood-based material 1 by using an adhesive such as vinyl.

The wood-based sound-proof flooring material produced in this way is a simple plywood without a damping material such as a soft sheet in the middle layer as the wood-based base material 1 as shown in an actual example described later. Even if it is used, it can have a sufficient sound insulation effect, which greatly reduces the manufacturing cost. Further, since the synthetic resin film 4 is attached to the back surface, it is possible to prevent the moisture on the concrete slab surface from reaching the wood-based base material 1 after laying. Furthermore, when adhering to the concrete slab surface via an adhesive, the adhesive enters the concave portion of the back surface cushioning material 2 to lower the sound insulation performance, or the adhesive permeates into the back surface cushioning material and hardens, so that the sound insulation performance is reduced. It is also possible to avoid a decrease in.

Further, the synthetic resin film 4 is the back cushion material 2.
Although the synthetic resin film 4 and the tips of the protrusions 21 are bonded to each other with the nonwoven fabric 3 interposed therebetween, a strong bond can be obtained. No peeling occurs 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 wood-based substrate 1
Is different from the wood-based soundproof flooring material shown in FIG. 1 in that the urethane sol coat 5 is provided between the back surface cushioning material 2 and the flat side surface of the back surface cushioning material 2. By providing the urethane sol coat 5, this wood-based soundproofing floor material does not penetrate into the backside cushioning material by the adhesive that bonds the woody base material and the backside cushioning material, and the soundproofing property of the woody soundproofing floor material is improved. It has the unique effect of not damaging it.

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

In this case, the adhesive strength of the synthetic resin film 4 to the back surface cushioning material 2 is further increased, the peeling of the synthetic resin film 4 can be reliably prevented, and the wooden base material 1 and the back surface are Since the contact area with the cushioning material 2 is reduced, the sound insulation effect is also improved. Further, by interposing the non-woven fabric 6 between the back surface of the wood-based base material 1 and the back surface cushioning material 2 as well, the adhesive force between the two becomes strong, and the deterioration of the vibration isolation performance and sound insulation performance due to the peeling between the materials is avoided. it can. The adhesive force between the wood material and the foamed material by the adhesive is quite high, and the intended purpose can be achieved without interposing the nonwoven fabric 6.

FIG. 4 shows another embodiment of the wooden soundproof floor material according to the present invention. In this example, the back cushion material 2
In addition to the convex portion 21 on the back surface side, the convex portion 23 on the front surface side
3 is different from that shown in FIG. In this case, the space corresponding to the depth of the recess 22 of the back surface cushioning material 2 in the embodiment shown in FIGS. 1 to 3 is secured by the space of the front surface recess 22a and the space of the back surface recess 23a. As a result, it is possible to eliminate the risk of material destruction due to over-compression of the foamed sheet or deterioration of sound insulation performance. In forming the back cushioning material 2 of this shape, a hot platen press having a large number of embossments on both upper and lower hot platen surfaces, or a flat plate-like hot platen press having punching plates placed on both upper and lower hot platen surfaces is used. It can be used and easily molded.

In the embodiment shown in FIG. 4, the backside convex portion 21 and the front side convex portion 23 of the backside cushioning material 2 have different shapes, but the same shaped convex portion is formed on both sides. Even if formed, the intended purpose can be achieved. The following wooden soundproof floor materials were actually created. 9 mm thick as a wood-based substrate
Four 5-ply plywoods of 75 mm × 900 mm prepared by using a hot-melt in a geese type were used, and a cut groove for 3 plies was formed on the back surface thereof. The kerf had a width of 2 mm, a depth of 6 mm, and a pitch of 15 mm.

As a back buffer 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 back surface has an average diameter of 1
A protrusion having a thickness of 0 mm and a height of 3.2 mm was set to about 50% of the total area, and a thickness of 4 mm was used. An adhesive is applied only to the tips of the convex portions 21 of the back surface cushioning material, and a polyester nonwoven fabric (30 g / m ² ) is adhered to a 40 μm polyethylene film by heat fusion. Attached as the material side.

Next, the flat surface side of the back surface cushioning material was attached to the back surface of the above-mentioned wood base material using a vinyl adhesive. This wooden soundproof floor material was laid after the urethane adhesive was applied to the surface of the concrete slab. No peeling of the polyethylene film was observed during the laying work, and the unevenness on the surface of the concrete slab was well followed and it was possible to lay it in close contact. After laying, JIS A1
According to the test prescribed 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 FIG. 8, B is the impact sound level on the surface of the concrete slab of 150 mm.

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 means that the backside cushioning material compressed by the hot press has sufficient resistance to short-term repetitive loading as well as long-term loading, and so-called "settling" does not occur. It is presumed that the change in physical properties was small.

After the test, the adhesive surface (the surface of the convex portion) between the wooden base material and the back cushion material was observed, but no peeling occurred. Further, peeling between the back surface cushioning material and the polyethylene film was not observed. In this state, after leaving for 7 days, the wooden soundproof flooring material was taken out and fractured, and the back surface cushioning material was observed. As a result, the presence of the adhesive applied to the concrete slab surface was not seen.

From the above-mentioned tests, the wooden soundproof flooring material according to the present invention uses a simple plywood as a wooden base material, but is a continuous foaming type such as a polyurethane foam sheet as the back cushion material. By using a soft or semi-rigid synthetic resin foam sheet that is thinned by compression with a hot press and at the same time has a large number of protrusions on one or both sides, the propagation of vibration from top to bottom is greatly reduced. You can see that

Further, since the back surface cushioning material has a low density layer and a high density layer, it exhibits high resistance to repeated short-term loads and long-term loads, and causes deterioration of sound insulation performance and sound insulation performance over a long period of time. Absent. Further, by forming the cut grooves in the wood-based material, it is possible to well follow the irregularities on the surface of the concrete slab at the time of laying, prevent lifting and the like from occurring, and help improve soundproofing.

Further, since the synthetic resin film is adhered to the backside of the backside cushioning material with the non-woven fabric layer interposed therebetween, the adhesive does not penetrate into the backside cushioning material side and the sound insulation performance is not deteriorated. 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 wooden soundproof flooring itself is low cost and easy.

[0034]

As is clear from the above description, the wood-based soundproof flooring material according to the present invention is low in cost and easy to manufacture, and the continuous foaming type soft or semi-rigid synthetic resin foamed sheet is used as a whole. The backside cushioning material obtained by heat compression is
Since it has a convex portion with a clear shape and has a low-density layer portion and a high-density layer portion, the propagation of vibration from the upper part to the lower part is reduced, and sound insulation and sound insulation are improved. Also,
The effect is also maintained for a long time. Furthermore, the sound insulating property is improved because the surface of the concrete slab is well followed and no floating occurs even when laying.

Further, since the synthetic resin film is adhered to the back surface of the back surface cushioning material with the non-woven fabric layer interposed therebetween, the adhesive does not penetrate into the back surface cushioning material side, and the sound insulation performance is not deteriorated. 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 drawings]

FIG. 1 is a cross-sectional view showing an 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 cross-sectional view showing still another embodiment of the wooden soundproof flooring material 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 cross-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 floor material.

FIG. 8 is a graph showing the test results prescribed in JIS A1418 for one example of the wooden soundproofing flooring material according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wood-type base material, 11 ... Cut groove, 2 ... Back cushion material, 21 ...
Convex part, 22 ... Recessed part, 3 ... Nonwoven fabric, 4 ... Synthetic resin film

Claims (3)

[Claims] 1. A wooden soundproof floor material obtained by laminating and integrating a wood-based base material and a backside cushioning material, wherein the wood-based base material has a kerf formed on the backside thereof, and the backside cushioning material is continuous. It is made of a foam type soft or semi-rigid synthetic resin foam sheet that is compressed by hot pressing to reduce its thickness and at the same time has multiple convex portions formed on one or both sides. A wood-based soundproofing flooring material, characterized in that a synthetic resin film is adhered with the interposition of. 2. The wood-based soundproof flooring material according to claim 1, wherein the wood-based base material and the back surface cushioning material are laminated and integrated with a non-woven fabric layer interposed therebetween. 3. The wood-based soundproof flooring material according to claim 1, wherein the continuous foaming type soft or semi-rigid synthetic resin foaming sheet is a polyurethane foaming sheet.