JPH09203197A - Buffer material for floor plate and sound insulating floor plate made of buffer material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade the deterioration of sound insulating ability (sound proofing ability) due to adhesive applied to a concrete face at the time of spreadly providing a sound insulating floor plate. SOLUTION: An elastic sheet 11 having a plurality of projections unitedly formed on one or both its faces and a synthetic resin foam body layer 15 which exists on at least one face side having the projections 12 of the elastic sheet in a state where it reaches upto the tip of the projection, and it is softer than the elastic sheet are laminated. The invading of an adhesive applied to a concrete face into the side of the elastic sheet 11 is checked by the synthetic resin foam body layer 15, and the deterioration of sound insulating ability can be thereby evaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof floorboard in which a cushioning material for the floorboard is attached to the back surface of a wooden base material so that the floorboard has a soundproof function.

[0002]

2. Description of the Related Art A soundproof floorboard is known in which a wood material such as plywood is used as a base material, and a cushioning material is laminated on the back surface thereof to provide a soundproof function. This kind of soundproof floor board is usually attached directly to a concrete slab or to a waste plywood laid on the concrete slab with an adhesive to form a so-called flooring floor. From the viewpoint of improving the soundproofness (sound insulation) of the floor or the feeling of walking, various shapes and structures of the wood base material and the cushioning material have been proposed.

As an example, a soundproofing is provided by attaching an elastic sheet (rubber sheet) having a large number of protrusions (projections) on the back surface of a wooden base material having a large number of cut grooves on the back surface as a cushioning material. A floor board is constructed, and the soundproof floor board is attached to a concrete surface by an adhesive with the convex side of the elastic sheet being the concrete surface side (JP-A-63-241).
No. 264, etc.), a cushioning material coated with natural rubber or a synthetic resin is attached to a back surface of a wood base material so that a non-woven mat having an uneven pattern is not easily disappeared to form a soundproof floor board. Those (see Japanese Patent Laid-Open No. 2-96053, etc.) and the like are known. As the material of the cushioning material to be attached to the back surface of the wooden base material, synthetic resin foam such as rubber foam, polyurethane foam, polyethylene foam, etc. may also be used.

By attaching a cushioning material having elasticity to the back surface of the wooden base material, the impact sound (light impact) on the surface of the floor material is reduced from propagating downstairs through the concrete slab, and the soundproofing (sound insulation) is achieved. ) Is improved. In particular, in the case of forming unevenness (projections) on at least the surface of the back cushioning material that is in contact with the concrete surface, as in the above soundproof floor board, limit the contact surface between the floor board and concrete to only the projections. Since it is possible to further reduce the propagation of vibration,
It has been proved that the sound insulation is further improved. It has also been proved that the sound insulation is improved by forming a large number of cut grooves on the back surface of the wooden base material, and at the same time, the cut grooves make the followability of the floor material to the unevenness of the concrete surface good. .

[0005]

The present applicant has experienced many flooring floor constructions using the soundproof floor board having the above-mentioned construction. In the process, an adhesive is applied to the concrete surface, and then the concrete surface is applied. When applying the soundproof floor board having the above-mentioned configuration, if the amount of the adhesive applied is too large, the space between the concrete surface formed by the protrusions on the back surface of the cushioning material and the cushioning material is In addition to being buried, the elastic deformation of the protrusions formed on the back surface is obstructed, and as a result, the contact area between the floor material (the back surface of the back surface cushioning material) and the concrete surface increases more than expected. I knew that performance would decrease. We also experienced that if the amount of adhesive applied was too small, the adhesion to the concrete surface would be point adhesion only at the tips of the projections, and thus adhesion failure would easily occur.

An object of the present invention is to eliminate the above-mentioned inconvenience that tends to occur when a soundproof floorboard having an elastic body having a protrusion on the backside as a backside cushioning material is attached to a concrete surface for construction. Specifically, regardless of the application state of the adhesive applied to the concrete surface at the time of construction, the projection integrally formed on the back surface cushioning material is prevented from being embedded by the adhesive, thereby, (EN) Provided are a cushioning material for floorboards capable of maintaining high sound insulation performance for a long period of time and preventing defective adhesion to a concrete surface, and a soundproof floorboard to which the cushioning material is attached.

[0007]

A cushioning material for a floorboard according to the present invention for solving the above-mentioned problems is basically an elastic sheet integrally formed with a plurality of projections on one surface or both surfaces, and an elastic sheet of the elastic sheet. A synthetic resin foam layer having at least one surface having a projection and having a thickness reaching at least the vicinity of the tip of the projection, wherein the synthetic resin foam layer is softer than the elastic sheet. Characterize.

The elastic sheet may be a synthetic rubber foam sheet, a rubber sheet, a synthetic resin foam sheet, a non-woven fabric, or the like, which is used alone or as a laminate of two or more materials used as a back cushioning material for conventional soundproof floorboards. It can be used arbitrarily. A method of integrally forming a plurality of protrusions on one surface or both surfaces of the elastic sheet is also optional. It may be a method of molding with a press or the like. Further, polyester fibers, with polypropylene fibers, short fibers of nylon fibers or the like, and it nonwoven fabric as mat by needle punching method for example (about basis weight 150g / m ³ ~1000g / m ³ are preferred), against the non-woven fabric A method in which a protrusion is formed by inserting a needle may be used.

The thickness of the elastic sheet including the protruding portion is 3
It is preferable that the height of the protrusion is about 2 mm to 5 mm. If the thickness is too thin, the sound insulation effect is poor, and if it is too thick, the cost is increased and the walking feeling may be deteriorated. If the height of the protrusions is too low, the protrusions will be depressed by the pressure applied from above and the protrusions will not function. If it is too high, the walking feeling is adversely affected. The cross-sectional area of one protrusion is preferably about 0.03 cm ^{2 to 4} cm ² , and the interval between the protrusions is preferably about 5 mm to 20 mm, but the present invention is not limited to this, and a preferable value is set according to the type of material and the use environment. You can select it.

The synthetic resin foam provided on at least one side of the elastic sheet having the projections is a synthetic rubber foam such as chloroprene rubber, nitrobutadiene rubber, styrene-butadiene rubber, a polyolefin resin foam, or a polyurethane resin foam. In any case, the synthetic resin foam is softer than the elastic sheet, that is, the protrusions formed on the elastic sheet are free due to the presence of the synthetic resin foam layer. Soft (elastic deformation) is made so soft that it is not substantially hindered. Thereby, the protrusion can fulfill the same sound-insulating function as the conventionally known back cushioning material having the protrusion (concavity and convexity) despite the presence of the synthetic resin foam layer.

The thickness of the synthetic resin foam layer is such that it reaches at least the vicinity of the tips of the protrusions, but it is necessary that the thickness of the synthetic resin foam layer cover the tips of the protrusions slightly so that the adhesive penetrates from the tips of the protrusions. It is particularly preferable because it is prevented and the walking feeling is not deteriorated. Preferably, the synthetic resin foam has closed cells or a thin resin film is laminated on the back surface. Thereby, as will be described later, when laying a soundproof floorboard on a concrete surface, it is possible to more completely prevent the adhesive from penetrating inside the synthetic resin foam, and the intended purpose is further achieved. It

The method of manufacturing the cushioning material for floorboard according to the present invention is arbitrary, but preferably, the foamable synthetic resin is poured onto the surface of the elastic sheet on the side where the synthetic resin foam layer is to be formed, and the mixture is placed in the foaming furnace. To foam to a specified thickness, or after foaming, scrape with a blade to a specified thickness. According to this manufacturing method, the synthetic resin foam is layered and integrated with the elastic sheet simultaneously with foam molding, and the step of laminating the elastic sheet and the synthetic resin foam layer can be omitted. In addition, it is a preferred embodiment that an epidermis is formed on the surface of the foam and the epidermis functions as a non-penetrative membrane of the adhesive. The expansion ratio (specific gravity) of the foamed synthetic resin layer is appropriately selected according to the type of the resin material, but at least the protrusions are substantially free even if the synthetic resin foam layer is present as described above. Foam to such an extent that it becomes deformable and soft.

The present invention further discloses a soundproof floorboard characterized in that the above-mentioned cushioning material for floorboard is attached to the back surface of a wood base material such that the synthetic resin foam layer side is the back surface. . As the wood base material, those used for conventional soundproof floor boards can be appropriately used, such as plywood, particle board, hard board, LVL (parallel plywood),
MDF (medium fiberboard) and the like can be mentioned, and a name wood veneer or a decorative synthetic resin sheet may be attached to the surface thereof, or a decorative layer may be formed by coating. Preferably, the wood base material is a 5-ply plywood, and a large number of concave grooves reaching from the front surface side to the second-layer veneer board are formed from the back surface side.

FIG. 1 is a sectional view showing a preferred example of the soundproof floor board according to the present invention. In this example, a 5-ply plywood is used as the wood base material 1, and the second-layer veneer 1 ₂ from the surface side thereof.
A large number of recessed grooves 2 reaching up to are formed from the back surface side. Preferably, the groove 2 has a width of about 1.5 mm to 3 mm,
The pitch is preferably about 10 mm to 25 mm from the viewpoint of productivity, soundproofing, strength, etc., but is not limited to this. That is, it is preferable to form the groove 2 as deep as possible from the viewpoint of sound insulation, but if it is too deep, the bending strength of the soundproof floor plate decreases,
The floorboard may be damaged during transportation or construction, and if the third layer is left from the surface side, it will remain when bending is applied.
There is a risk that the layers will break and cause floor noise. Therefore, it is a particularly preferable mode to form a groove extending from the surface layer to the second layer (for the configuration, refer to Japanese Patent Application No. 7-14487 filed by the applicant of the present application).

Preferably, each of the wood base materials 1 has a size of about 9 mm × 75 mm × 900 mm, and after a large number of the wood base materials 1 are assembled, the above-mentioned floor board cushion is provided on the back surface thereof. The material 10 is attached. In FIG.
Reference numeral 11 is the elastic sheet described above, and 15 is a synthetic resin foam layer. In the example of FIG. 1, one surface of the elastic sheet 11 is a flat surface, and a large number of protrusions 12 are integrally formed only on the other surface. The flat surface side is the wood base material 1
The synthetic resin foam 15 is adhered to the back surface of the elastic sheet 11 with an adhesive agent, and is made softer than the elastic sheet 11 on the projection 12 side so that the thickness slightly exceeds the tip of the projection 12. Are stacked.

FIG. 2 is a cross-sectional view showing another example of the soundproof floor board according to the present invention. In this example, the projection 13 is formed on the side facing the wood base material 1 of the elastic sheet 11 as well. A nonwoven fabric 14 is sandwiched between the wooden base material 1 and the elastic sheet 10 for the purpose of facilitating adhesion between the wooden base material 1 and the elastic sheet 10 which is a cushioning material for floorboards. In laying the soundproof floorboard according to the present invention on the concrete surface, as in the case of the conventionally known soundproof floorboard, after applying the adhesive to the concrete surface, the soundproof floorboards are sequentially arranged from above, or It may be attached using double-sided adhesive tape or the like. In the soundproof floorboard according to the present invention, by laminating the synthetic resin foam layer on the back surface side of the elastic sheet, the adhesive area is widened and the adhesive force with the concrete surface is strengthened, and at the same time, an adhesive is used to bond the concrete. Even when it is attached to the surface, the presence of the synthetic resin foam layer does not impair the function as the protrusion due to the applied adhesive, and it is possible to avoid deterioration of the sound insulation performance due to the adhesive. Further, as described above, the synthetic resin foam layer is made sufficiently softer than the elastic sheet, and does not prevent normal elastic deformation of the protrusions, so that sound insulation performance is not deteriorated. Further, in this example,
Since a large number of concave grooves 2 are formed in the wooden base material 1,
Along with improved sound insulation, the walking feeling is enhanced.

[0017]

The present invention will be described below with reference to examples. [Example 1] Size 75 mm x 900 mm, thickness 9 mm
On the back surface of the 5-ply plywood, a groove 2 mm wide, which is orthogonal to the length direction from the back surface so as to reach the second layer veneer from the front surface,
After forming a narrow wooden base material formed with a pitch of 15 mm and forming male and female zones on the four circumferences, four planes are staggered by 70 mm, 100 mm and 30 mm respectively in the longitudinal direction. It was designed to be.

On the back surface of this wood base material, the surface having the protrusions of protrusion-containing non-woven fabric (weight per unit area: 300 g / m ² ) including protrusions of 5 mm, the styrene-butadiene rubber foam ( A 5 mm-thick cushioning material for a floorboard, in which a synthetic resin foam layer was formed by embedding it at a foaming ratio of 10 times), with a modified vinyl acetate adhesive so that the synthetic resin foam layer side would be the concrete surface side I attached it and made a soundproof floorboard. A soundproof floor was constructed by bonding the soundproof floorboard to the concrete surface coated with urethane adhesive with the cushioning material side being the concrete side.

Example 2 The same soundproof floorboard as in Example 1 was used,
A soundproof floor was constructed by sticking to the concrete surface with double-sided adhesive tape.

[Comparative Example 1] Other specifications are the same as those of Example 1, except that a soundproof floor board in which a synthetic resin foam layer is not formed on the protrusion side of the back cushioning material is used as a cushioning material on a concrete surface coated with a urethane adhesive. A soundproof floor was constructed by pasting the side as the concrete side.

[Comparative Example 2] Other specifications are the same as those of Example 1, and a soundproof floorboard in which a synthetic resin foam layer is not formed on the protrusion side of the back cushioning material is attached to the concrete surface with a double-sided adhesive tape to produce a soundproof floor. Configured. For each, JI
According to the test prescribed in S A1418, floor impact sound (light impact) was applied from the floor board surface side, and the floor impact sound level was measured downstairs. Table 1 shows the results.

[0022]

[Table 1]

As can be seen by comparing the L numbers of Comparative Example 1 and Comparative Example 2, in the conventional soundproof floor board (without the synthetic resin foam layer), the sound insulation effect by the adhesive at 125 Hz and 250 Hz. In the soundproof floorboard according to the present invention, when the urethane adhesive is used for sticking to the concrete surface (Example 1)
Also, when not used (adhesion with a double-sided adhesive tape) (Example 2), the impact sound level (L number) is almost the same, and it can be seen that the adhesive does not reduce the sound insulation.
Furthermore, the soundproof floorboard according to the present invention shows a lower impact sound level than that of the comparative example both with and without the adhesive. It can be understood that this is because the floor impact sound is buffered in the arranged resin foam layer, which also demonstrates the effectiveness of the soundproof floorboard according to the present invention.

[Example 3] A soundproof floorboard was prepared in the same manner as in Example 1 except that a wood base material having no recessed groove was used, and the soundproof floorboard was buffered on a concrete surface coated with a urethane adhesive. A soundproof floor was constructed by pasting the material side as the concrete side.

[Embodiment 4] The same soundproof floorboard as in Embodiment 3 is used.
A soundproof floor was constructed by sticking to the concrete surface with double-sided adhesive tape.

[Comparative Example 3] Other specifications are the same as those of Example 3, and a soundproof floor board in which a synthetic resin foam layer is not formed on the protrusion side of the back surface cushioning material is used as a cushioning material on the concrete surface coated with urethane adhesive. A soundproof floor was constructed by pasting the side as the concrete side.

[Comparative Example 4] Other specifications are the same as those of Example 3, and a soundproof floor board in which a synthetic resin foam layer is not formed on the protrusion side of the back cushioning material is attached to the concrete surface with a double-sided adhesive tape. Configured. For each, JI
According to the test prescribed in S A1418, floor impact sound (light impact) was applied from the floor board surface side, and the floor impact sound level was measured downstairs. Table 2 shows the results.

[0028]

[Table 2]

As shown in Table 2, even when the wood base material having no groove is used, as in Examples 1 and 2 and Comparative Examples 1 and 2, according to the present invention. The cushioning material for floor boards is functioning effectively. In addition, Example 1,
The L value of Example 2 is lower than the L values of Examples 3 and 4, and it can be seen that the groove has a significant effect on the sound insulation effect.

[0030]

EFFECTS OF THE INVENTION According to the soundproof floorboard manufactured according to the present invention, it is possible to avoid a decrease in soundproofness (soundproofness) due to an adhesive that appears when laying on a concrete surface.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a soundproof floor board according to the present invention.

FIG. 2 is a sectional view showing another example of the soundproof floor board according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wood base material, 2 ... Groove, 10 ... Buffer material for floorboards, 11 ...
Elastic sheet, 12, 13 ... Protrusion, 14 ... Nonwoven fabric, 15 ...
Synthetic resin foam layer

Claims (4)

[Claims] 1. An elastic sheet having a plurality of projections integrally formed on one surface or both surfaces, and a synthetic resin foam having a thickness which is disposed on at least one surface side of the elastic sheet having the projections and has a thickness reaching at least the vicinity of the tips of the projections. A cushioning material for a floorboard, which has at least a layer, and wherein the synthetic resin foam layer is softer than the elastic sheet. 2. The cushioning material for a floor board according to claim 1, wherein the synthetic resin foam layer has a thickness exceeding the tips of the protrusions. 3. A soundproof floorboard, characterized in that the floorboard cushioning material according to claim 1 or 2 is attached to the backside of a wooden base material such that the synthetic resin foam layer side is the backside. 4. The soundproofing according to claim 3, wherein the wood base material is a 5-ply plywood, and a large number of concave grooves extending from the front surface side to the second layer veneer are formed from the back surface side. Floorboard.