JPH0687544U - Cushioning material for soundproof direct floor material and soundproof direct floor material using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cushioning material for a sound-proof direct flooring material capable of improving the workability and soundproofing performance, and a soundproofing direct flooring material having excellent workability and soundproofing performance. [Structure] A cushioning material formed by sequentially laminating a nonwoven fabric having a small apparent density, a nonwoven fabric having a large apparent density, and a polymer film having a thickness of 30 to 100 µm, wherein the polymer film has a coverage of 30 to 70% cushioning material for sound-proof direct floor coverings.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cushioning material and a soundproof flooring material using the same, and more particularly, a cushioning material for a soundproofing direct flooring material that improves workability when it is attached to a floor substrate such as concrete slub with an adhesive. , And a soundproof floor covering using the same.

[0002]

[Prior art]

 In recent years, sound-insulating flooring with a cushioning material attached to the back of a wooden floor is often used for floors of middle- and high-rise houses. As the cushioning material used in this case, a foamed plastic material such as a foamed sheet having voids inside or a fibrous material such as a non-woven fabric is used.

In particular, when a fibrous material such as a non-woven fabric is used as the cushioning material, the floor material is temporarily placed on a floor base coated with an adhesive such as a concrete slab and moved to a predetermined position. However, since the adhesive permeates the voids of the nonwoven fabric, it is difficult to move, and the voids of the cushioning material decrease, and the fibers bond and solidify, which significantly reduces the spring effect of the cushioning material. Even if a cushioning material with a good cushioning effect is used, its performance is not fully exerted, and the soundproofing performance is not sufficiently exerted.

In order to solve these drawbacks, a cushioning material in which a sheet made of a foamed plastic material is attached to the back surface of a fibrous material has been proposed, but in the case of a sheet made of a foamed plastic material, it is as thin as 1 mm or less. Since it is difficult to manufacture things, the entire cushioning material becomes thicker, and the subsidence due to the applied load increases, resulting in poor walking feeling.

As a method for solving the above drawbacks, it has been proposed to attach a sheet having a coverage of 90 to 70% to the lower surface of the cushioning material (Japanese Utility Model Publication No. 4-90628). However, although the above method can improve the workability, it has a drawback that the soundproofing performance after the adhesive is hardened is deteriorated as compared with the case where the adhesive is not used. Also, 90 to 70% of the adhesive area between the floor base material and the floor material is adhered to the floor material film. For example, when a heavy object placed on the floor material is lifted and moved, the floor is said to float. A case arises.

[0006]

[Problems to be solved by the device]

 Therefore, the inventors of the present invention have made diligent studies to solve the above drawbacks, and as a result, when a non-woven fabric obtained by laminating a low-density non-woven fabric on a high-density non-woven fabric, the lower side of the lower non-woven fabric is used. Even if the coverage of the sheet to be attached to the floor is reduced, it is possible to reduce the permeation of the adhesive applied to the floor surface into the cushioning material and improve the slippage with the floor surface during construction. The present inventors have found that the adhesive strength can be imparted and the soundproofing performance of the floor material can be enhanced, and the present invention has been achieved. Therefore, the first object of the present invention is to provide a cushioning material for a floor panel of soundproofing which can improve the soundproofing performance as well as the workability. A second object of the present invention is to provide a soundproof floor covering which is excellent in workability and soundproofing performance.

[0007]

[Means for Solving the Problems]

 The above-mentioned various objects of the present invention are a buffer material formed by sequentially laminating a non-woven fabric having a low apparent density, a non-woven fabric having a high apparent density, and a polymer film having a thickness of 30 to 100 μm. The present invention has been achieved by a cushioning material for a soundproof direct flooring material, which is characterized in that the coverage of the nonwoven fabric is 30 to 70%, and a soundproofing direct flooring material using the same.

Next, a cushioning material for a soundproof direct flooring material of the present invention (hereinafter simply referred to as a cushioning material) and a soundproofing direct flooring material using the same will be described with reference to the drawings. FIG. 1 is a schematic sectional view of a cushioning material of the present invention. In the figure, 1 is an upper layer made of a nonwoven fabric having a low apparent density, 2 is a lower layer made of a nonwoven fabric having a high apparent density, and 3 is a polymer film. The non-woven fabric having a small apparent density used for the upper layer 1 in the present invention is not particularly limited as long as it has a large void between fibers.

The fibers used for the above-mentioned non-woven fabric are preferably heat fusion fibers having a thickness of 10 to 40 denier, and particularly preferably 15 to 35 denier. If the thickness of the fiber is less than 10 denier, sufficient soundproofing effect cannot be obtained. On the contrary, if it is thicker than 40 denier, the non-woven fabric made of the fiber is attached to the back surface of the flooring to directly insulate the soundproofing of the present invention When it is used as a floor material, the adhesive strength between the non-woven fabric and the floor material base material such as plywood becomes small.

Although such a non-woven fabric has an excellent cushioning effect and soundproofing effect (hereinafter, simply referred to as a cushioning effect) even if the thickness is small, when it is used as a cushioning material, Since the space between them is large, the adhesive permeates into the spaces between the fibers and solidifies during construction.As a result, the voids in the cushioning material decrease, the soundproofing effect decreases, and the fibers adhere to each other. The spring effect is also significantly reduced. The non-woven fabric having a high apparent density used for the lower layer 2 in the present invention is not particularly limited as long as it has few voids between fibers and can prevent the adhesive from penetrating into the interior during construction. Absent.

The fibers used in the above-mentioned nonwoven fabric are preferably heat fusion fibers having a thickness of 0.5 to 5 denier. When the thickness of the fibers is 5 denier or more, the gap between the fibers is large, and it is impossible to prevent the adhesive from penetrating into the upper nonwoven fabric. Further, even if the fiber having a denier of 0.5 or less is used, not only the effect of preventing penetration of the adhesive is hardly improved, but also the cost is increased.

[0012] Such a non-woven fabric is inferior in cushioning effect to the non-woven fabric used for the upper layer, but since the fibers are intimately entangled with each other, there are few voids, and the penetration of the adhesive is limited to only the front surface. Therefore, it is possible not only to prevent the decrease in the spring effect of the cushioning material due to the permeation of the adhesive as in the conventional case, but also the workability is slightly deteriorated.

Therefore, in order to improve the workability, it is possible to reduce the coverage of the polymer film, which will be described below, which is attached to the lower side of the nonwoven fabric having a small apparent density. Therefore, the cushioning material of the present invention can be used. When it is used as a floor material, it is possible to secure the adhesive strength between the sound-proof straight floor material and the floor base material. The basis weight of the nonwoven fabric of the lower layer 2 is preferably at least 30 g / m ² or more from the viewpoint of effectively preventing the adhesive from permeating into the upper part.

That is, since the non-woven fabric of the lower layer 2 is densely intertwined with the finer fibers than the non-woven fabric of the upper layer 1, the non-woven fabric has a strong adhesive force to the concrete slab. For example, if the coverage of the polymer film is up to 60%. As a result, it is possible to secure an adhesive force that is similar to the adhesive force of the upper nonwoven fabric when it is not covered at all. Further, when the coverage is 50% or less, the adhesive force is stronger than the adhesive force of only the upper nonwoven fabric.

As described above, by combining the layer of the non-woven fabric made of the thin fibers and the layer of the non-woven fabric made of the thick fibers, the non-woven fabric of the upper layer 1 using the thick fibers and having a small apparent density is used to improve the soundproof performance. In addition, the non-woven fabric of the lower layer 2 which uses fine fibers and has a high apparent density secures the adhesive force, and prevents the adhesive from permeating into the non-woven fabric during construction, thereby preventing the reduction of the spring effect. be able to.

The fibers used for the non-woven fabric can be appropriately selected and used from known fibers such as polyamide fibers, polyester fibers, polypropylene fibers or polyethylene fibers. The type of fiber used may be one type, or a plurality of types of fibers may be mixed.

In the present invention, from the viewpoint of facilitating the manufacture of the cushioning material, it is preferable to connect the upper layer 1 and the lower layer 2 by heat fusion and needle punching, and from the viewpoint of improving the cushioning performance, It is preferable that the total weight of all layers (simply referred to as a buffer layer) including the upper layer and the lower layer is 100 to 400 g / m ² and the apparent density is 0.02 to 0.05 g / cm ³ .

The cushioning material of the present invention has an overall dynamic spring constant of 5 to 20 × 10 ⁶ N / m ³ , a static vane constant of 2 to 10 × 10 ⁶ N / m ³ , and a loss coefficient of 0. 1 to 0.3 is preferable, and in particular, the dynamic spring constant is 7 to 15 × 10 ⁶ N / m ³ and the static spring constant is 2 to 5 × 10 ⁶ N / m ^3. It is preferably formed. When the dynamic spring constant and the static spring constant are 5 × 10 ⁶ N / m ³ or less and 2 × 10 ⁶ N / m ³ or less, respectively, the amount of deformation when a load is applied becomes large. When the adhesive is in an uncured state at the time of construction, the thickness of the cushioning material may be greatly reduced by the load of a pedestrian, and the adhesive may penetrate into the nonwoven fabric of the upper layer 1.

When the dynamic spring constant and the static spring constant are 20 × 10 ⁶ N / m ³ or more and 10 × 10 ⁶ N / m ³ or more, respectively, the cushioning material becomes too hard and the lower layer Since the adhesive hardly penetrates into the non-woven fabric layer 2, it may not be possible to obtain sufficient adhesive force with the floor surface. The buffer layer has a thickness of 1 to 10 mm, preferably 3 to 7 mm. If the thickness is less than 1 mm, the effect as a cushioning material is hardly obtained, and if the thickness is more than 10 mm, the floor material sinks largely and the walking feeling is bad.

The polymer film 3 to be laminated on the lower surface of the lower layer in the present invention is preferably a polymer film which does not absorb an adhesive and has a water and moisture barrier property. Therefore, the back surface of the flooring material using the cushioning material of the present invention, which is partially covered with the film, has a low frictional resistance with the flooring base material and thus has good workability. In the present invention, in order to secure the adhesive force between the flooring material and the concrete slab surface, the film coverage is preferably in the range of 30 to 70%, and particularly preferably 30 to 60%.

The above-mentioned polymer film can be appropriately selected and used from known synthetic resin films such as vinyl chloride, polyethylene, polypropylene, polyamide, polyester, etc., which have water-blocking / moisture-blocking properties. The thickness of the polymer film used in the present invention is preferably in the range of 100 to 30 μm, particularly 70 to 30 μm. If it exceeds 100 μm, the conformability to the unevenness of the surface of the non-woven fabric is poor, and if it is less than 30 μm, the strength of the film is insufficient and it may be broken when it is slid on the concrete slab surface.

The polymer film 3 can be easily attached to the lower layer 2 by using an adhesive such as acrylic rubber, nitrile rubber or butyl rubber, or an adhesive such as an epoxy resin. The coating of the lower layer 2 with the high molecular weight film is preferably such that the entire surface of the flooring material has substantially the same coverage, and that there is no difference in coverage partially (see FIGS. 2 to 4). When the pattern is coated as shown in FIG. 3, the laminating work is efficient. Moreover, by adopting the pattern as shown in FIG. 4, it is possible to eliminate the directionality in slipperiness and adhesive strength. Further, in the case of FIG. 5, it is possible to increase the efficiency of construction by making the direction in which the floor material slides and the direction of the pattern coincide during construction.

The sound-proof direct flooring material of the present invention is used as a flooring material such as fiberboard such as plywood, particle board and hard board, a base material such as gypsum board, or a decorative board obtained by applying a makeup process to the base material. It can be easily obtained by pasting the above-mentioned cushioning material on the back surface of any flat plate used as a well-known method. In this case, a layer similar to the lower non-woven fabric can be provided on the upper non-woven fabric to prevent the sound insulation performance from being deteriorated due to the adhesion to the base material, but the adhesive solidifies during the adhesion in this case. The amount of adhesive used is much less than the amount of adhesive used to bond the flooring to the concrete slab, and the pressure applied is also small. This is because it is completed.

[0024]

[Effect of device]

 As described above in detail, the cushioning material for the soundproof direct flooring material of the present invention has excellent cushioning performance and soundproofing performance because the adhesive does not excessively permeate during the construction. In addition, the sound-proof direct flooring material of the present invention is excellent in adhesiveness and sound-proofing and has good workability.

[0025]

【Example】

 Hereinafter, the cushioning material for a soundproof flooring material of the present invention and the soundproofing floor covering material using the same will be described in more detail with reference to Examples, but the present invention is not limited thereto.

Example 1. Heat-bonding fibers of polyethylene with a thickness of 18 denier and polyethylene with a thickness of 32 denier were mixed to prepare the upper layer 1 non-woven fabric so that the thickness was 4.5 mm and the basis weight was 140 g / m ² , while the thickness was A non-woven fabric for the lower layer 2 was prepared using a 2 denier polyolefin-based heat-sealing fiber so as to have a thickness of 0.5 mm and a basis weight of 60 g / m ² . Next, the upper layer 1 was laminated on the upper surface of the lower layer 2 by heat-sealing and needle punching, and the basis weight was 200 g / m ² , the apparent density was 0.036 g / cm ³ , and the thickness was 5.0 mm. (A layer obtained by combining the upper layer 1 and the lower layer 2) was obtained. On the lower layer 2 side of the obtained buffer layer, a polypropylene film having a thickness of 70 μm was laminated in the pattern of FIG. 3 so as to have a coverage of 50%, to obtain a cushioning material for soundproof flooring of the present invention. .

The dynamic spring constant, the static spring constant and the loss coefficient of the obtained cushioning material for soundproof flooring material were measured and found to be 11.85 × 10 ⁶ N / m ³ , 4.24 × 10 ⁶ N, respectively. / M ³ and 0.267. The obtained cushioning material for soundproof flooring material of the present invention was attached to the floor material having the sectional structure shown in FIG. 2 to obtain the soundproofing floor covering material of the present invention. The overall size of the flooring material was made to be 17.8 mm thick × 280 mm wide × 909 mm long. In addition, in FIG. 2, 5 shows the entire floor material excluding the cushioning material 4.

The first layer 6 constituting the floor material 5 is a single oak board having a thickness of 0.3 mm, the second layer 7 is a plywood plate having a thickness of 2.5 mm, and the third layer 8 is a plate having a thickness of 1.0 mm. The vibration-damping sheet made of acrylic rubber (“Shocknon”, product name of Shinoda Rubber Co., Ltd.), and the fourth layer 9 has a thickness of 9. It is 0 mm plywood. The groove 10 provided in the fourth layer 9 is for improving the conformability of the floor material to the uneven surface of the concrete slab and for further improving the soundproofing performance. Is a groove having a width of 2.4 mm, a depth of 9 mm, and a groove interval of 66.5 mm.

Soundproofing Test The soundproofing direct flooring material of the present invention of 1.5 tsubo prepared as described above is allowed to stand on the concrete slab surface without using an adhesive, and the floor impact sound is measured. When measured according to the impact sound level measurement method JIS A1418, the lightweight floor impact sound insulation performance was L45 (see mark ● in FIG. 6) and the heavy floor impact sound insulation performance was L56 (see FIG. 6 mark).

Next, 600 g / m ² of a flooring adhesive (E350-R, manufactured by Konishi Co., Ltd.) is applied to the top surface of the concrete slab, and the sound-proof direct flooring material of the present invention is attached to the concrete slab surface and bonded. When the floor impact sound was measured by the above measurement method after the agent had completely solidified, the light-weight floor impact sound insulation performance was L45 (see ▲ mark in Fig. 6) and the sound insulation performance using the adhesive was Was about 1 dB.

In an actual construction site, 600 g / m ^{2 of} an adhesive for flooring materials (E350-R manufactured by Konishi Co., Ltd.) was applied to the concrete slab surface, and the sliding resistance with the flooring material was measured using only springs. is the place 45.93kg / m ^2, was able to 7.3 7m ² construction per hour. The adhesive strength of the floor measured after the adhesive was solidified was 2. It was 01 kg / cm ² .

Comparative Example 1. In place of the cushioning material for sound insulation flooring material of the present invention used in Example 1, a thickness of 18-denier polyethylene and 32-denier polyethylene heat-sealing fibers used in the upper layer of Example 1 was mixed. A soundproofing floor material was obtained in exactly the same manner as in Example 1 except that a 5.0 mm thick non-woven fabric was used.

Using the obtained floor material for soundproofing, the floor impact sound with and without the adhesive was measured in exactly the same manner as in the Example. , L52 (see mark in FIG. 7) and L45 (see mark in FIG. 7), respectively, and the decrease in sound insulation performance due to the use of the adhesive was 7 dB. Further, the sliding resistance with respect to the concrete slab surface, which was carried out by the same method at the same construction site as in Example 1, was 157.2 kg / m ² , and the laying speed was 3.82 m ² / hour. Moreover, the adhesive force of the floor measured after the adhesive was solidified was 1.58 kg / cm ² .

Comparative Example 2. The polypropylene film used in Example 1 was applied to the cushioning material used in Comparative Example 1 in the same manner as in Example 1 in place of the cushioning material for soundproof flooring of the present invention used in Example 1. Then, a cushioning material was produced by wearing. The obtained cushioning material was attached to the same flooring material as that used in Example 1 to obtain a soundproofing flooring material.

Using the obtained floor material for soundproofing, the floor impact sound was measured in the same manner as in the examples with and without the use of an adhesive. , L49 (see mark in FIG. 8) and L45 (see mark in FIG. 8), respectively, and the reduction in sound insulation performance by using the adhesive was 4 dB. Further, the sliding resistance with respect to the concrete slab surface, which was carried out by the completely same method at the same construction site as in Example 1, was 102.4 kg / m ² , and the laying speed was 5.21 m ² / hour. The adhesive force of the floor measured after the adhesive was solidified was 0.79 kg / cm ² .

Comparative Example 3. In place of the cushioning material for the soundproof flooring material of the present invention used in Example 1, only the 2 denier polyolefin heat-sealing fiber used in the lower layer of Example 1 was used, and the thickness was 5 A soundproof flooring material was obtained in exactly the same manner as in Example 1 except that a cushioning material of 0.0 mm was used.

Using the obtained soundproofing flooring material, the floor impact sound was measured in the same manner as in Example 1 with and without the use of an adhesive. The performance was L56 (see Δ mark in FIG. 9) and L54 (see ○ mark in FIG. 9), respectively, and the decrease in sound insulation performance due to the use of the adhesive was 2 dB. The sliding resistance against the concrete slab surface was 113.1 kg / m ² and the laying speed was 4.27 m ² / hour, which was carried out in exactly the same manner at the same construction site as in Example 1. The adhesive force of the floor measured after the adhesive was solidified was 3.51 kg / cm ² . The above results are summarized in Table 1.

[0038]

[Table 1]

The results shown in Table 1 show that, due to the synergistic effect of the polymer film and the lower layer having a large apparent density of the thin fibers, it is possible to prevent the deterioration of the sound insulation performance while securing sufficient adhesive force. This proves that the workability can be improved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a cushioning material for soundproof flooring of the present invention.

FIG. 2 is a schematic cross-sectional view of a soundproof floor covering of the present invention.

FIG. 3 is a plan view showing a laminate pattern of a polymer film attached to the back surface of the cushioning material.

FIG. 4 is a plan view showing a laminate pattern of a polymer film attached to the back surface of the cushioning material.

FIG. 5 is a plan view showing a laminate pattern of a polymer film attached to the back surface of the cushioning material.

FIG. 6 is a diagram showing the lightweight floor impact sound insulation performance of the soundproof flooring material of the present invention.

FIG. 7 shows the light-weight floor impact sound insulation performance of the soundproof flooring material produced in Comparative Example 1.

FIG. 8 is a diagram showing the lightweight floor impact sound insulation performance of the soundproof flooring material produced in Comparative Example 2.

FIG. 9 is a diagram showing the lightweight floor impact sound insulation performance of the soundproof flooring material produced in Comparative Example 3.

[Explanation of symbols]

 1 Upper layer 2 Lower layer 3 Polymer film 4 Buffer material 5 Floor material 6 Decorative veneer 7 Plywood 8 Damping material 9 Plywood 10 Groove

Claims (4)

[Scope of utility model registration request] 1. A cushioning material comprising a non-woven fabric having a small apparent density, a non-woven fabric having a large apparent density, and a polymer film having a thickness of 30 to 100 μm, which are laminated in this order. 30-70% is a cushioning material for a floor panel of soundproofing material. 2. A non-woven fabric having a small apparent density has a thickness of 10 to 10.
A non-woven fabric composed of 40 denier heat-fusible fibers, a non-woven fabric having a high apparent density is a non-woven fabric composed of heat-fusible fibers having a thickness of 0.5 to 5 denier or less, and the upper layer and the lower layer are heat-sealed and needled. The soundproof straight-lining according to claim 1, wherein the whole layer of the non-woven fabrics connected by punches has a basis weight of 100 to 400 g / m ² and an apparent density of 0.02 to 0.05 g / cm ^3. A cushioning material for floor materials. 3. The dynamic spring constant of the entire cushioning material is 5 to 20 × 1.
0 ⁶ N / m ³ , static spring constant 2-10 × 10 ⁶ N / m
^{3. The} cushioning material for a soundproof direct floor covering according to claim 1 or 2, wherein the loss coefficient is 0.1 to 0.3. 4. A sound-proof direct-adhesive flooring material, characterized in that the non-woven fabric side having a small apparent density of the cushioning material according to any one of claims 1 to 3 is attached to the back surface of the flooring material.