JP2013032677A - Floor backing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor buffer material capable of imparting excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance while keeping a moderate feeling of walking, a floor material and a backing material using the floor buffer material.SOLUTION: A floor material 21 is configured by arranging a floor buffer material 11 on the whole area of the underside of a floor finishing material 22. The floor buffer material 11 in the floor material 21 includes at least two flexible materials 12A, 12B with different spring constants and a polymer sheet 13 disposed between the flexible materials 12A, 12B. The density of the polymer sheet 13 is higher than those of the at least two flexible materials 12A, 12B, and a product of the spring constant and the thickness of each of the at least two flexible materials 12A, 12B is different with each other. Therefore, the floor material has excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance while keeping a moderate feeling of walking.

Description

  The present invention relates to a floor cushioning material capable of imparting an excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance while maintaining an appropriate walking feeling, and a floor material and a floor base using the same. Regarding materials.

  Conventionally, in an apartment house or a detached house, in the case of a floor structure in which a hard wooden floor finish material is directly pasted on a concrete slab, the insulation against floor impact sound is inferior, and improvement thereof has been demanded.

  Therefore, in order to improve the floor impact sound downstairs, a construction method has been adopted in which a floor material in which a wooden board and a cushioning material such as a nonwoven fabric are combined is directly bonded to the slab surface. However, cushioning materials such as non-woven fabrics are soft and can attenuate the floor impact sound immediately after construction, but if the cushioning property is increased, the floor surface sinks by walking and gives a feeling of walking. On the other hand, when the thickness of the cushioning material is reduced with time and the cushioning property is lowered along with this, the fluffy feeling during walking is improved, but the floor impact sound attenuation performance is reduced as the cushioning property is lowered. Under such circumstances, there has been a demand for a flooring material that retains an appropriate walking feeling and that has excellent floor impact sound attenuation performance.

  For example, the floor structures shown in FIG. 16 and FIG. 17 have been proposed as floor structures in which attention is paid to such technical problems and countermeasures are taken. 16 uses a flooring material in which at least one intermediate layer 3 is disposed between a front surface material 1 and a back surface material 2, and the intermediate layer 3 is at least substantially different from each other. It is comprised by the combination of the buffer material 4 and the net-like body 5 of an unconstrained state (refer patent document 1).

  On the other hand, the floor structure shown in FIG. 17 is a floor structure in which a soundproof floor base material 8 is disposed between the floor material base 6 and the floor material 7, and the soundproof floor base material 8 extends between the upper and lower surfaces. It consists of the foam sheet 9 in which the through-hole penetrated and the nonwoven fabric 10 laminated | stacked on at least one of the upper and lower surfaces of this foam sheet 9 (refer patent document 2).

JP 9-317144 A JP 2010-53559 A

  However, although the floor structures shown in FIGS. 16 and 17 both have an appropriate walking feeling, they have not yet achieved excellent floor impact sound attenuation performance. As a result of further earnest research, the inventors of the present invention have further conducted diligent research on floor materials and floor base materials that have an appropriate walking feeling and have excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance. The present invention has been completed.

  That is, the present invention is a floor cushioning material capable of imparting an excellent lightweight floor impact sound attenuation performance and a heavy floor impact sound attenuation performance while maintaining an appropriate walking feeling, and a floor material and a floor using the same. The object is to provide a base material.

  In order to achieve the above object, the invention according to claim 1 comprises at least two flexible materials having different spring constants and a polymer sheet disposed between the flexible materials, and the density of the polymer sheet is at least the at least one. The gist of the present invention is a floor cushioning material that is larger than the density of the two flexible materials and that has a product of a spring constant and a thickness different from each other in the at least two flexible materials.

  The gist of the invention according to claim 2 is that the cushioning material for floor according to claim 1 is characterized in that at least two flexible materials having different spring constants are made of nonwoven fabric.

  The invention according to claim 3 includes p- (p-toluenesulfonylamido) diphenylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, octylation in at least one of the softener and the polymer sheet. Diphenylamine, 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), and N, N′-di-2-naphthyl- The floor cushioning material according to claim 1 or 2, characterized in that it contains one or more compounds selected from p-phenylenediamine.

  The gist of the invention according to claim 4 is the floor material characterized in that the floor cushioning material according to any one of claims 1 to 3 is attached to the lower surface of the floor finish material.

  The invention according to claim 5 is characterized in that the flooring material according to claim 4 is characterized in that a floor cushioning material is partially attached to the lower surface of the floor finishing material.

  The invention according to claim 6 is that the floor finishing material is separated into a surface material and a main body portion, and the floor cushioning material according to any one of claims 1 to 3 is sandwiched between them. The gist of the flooring is characterized by

  The invention according to claim 7 is characterized in that the flooring material according to claim 6 is characterized in that a floor cushioning material is partially attached between the surface material and the main body.

  The gist of the invention described in claim 8 is a floor base material characterized by using the floor cushioning material according to any one of claims 1 to 3.

  The invention according to claim 9 is characterized in that the floor cushioning material according to claim 8 is characterized in that a floor cushioning material is arranged on the entire or part of the lower surface of the floor foundation material. .

  The invention according to claim 10 is the gist of the floor base material according to claim 8 or 9, wherein a floor cushioning material is disposed on the upper surface of the floor base material.

  The floor cushioning material of the present invention comprises at least two flexible materials having different spring constants and a polymer sheet disposed between the flexible materials, and the density of the polymer sheet is the density of the at least two flexible materials. And the product of the spring constant and thickness of each flexible material in the at least two flexible materials is different from each other. In addition, there is an effect that it has excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance.

The expanded sectional view which showed the buffer material for floors of this invention. The expanded sectional view which showed the whole flooring using the buffer material for floors of this invention. The expanded sectional view which showed the whole another example of the flooring using the buffer material for floors of this invention. The expanded sectional view which showed the whole of another example of the flooring using the buffer material for floors of this invention. The expanded sectional view which showed the whole of another example of the flooring using the buffer material for floors of this invention. The expanded sectional view which showed the whole of another example of the flooring using the buffer material for floors of this invention. The expanded bottom view which shows the bottom face of the floor finishing material in the flooring using the floor cushioning material shown to FIG. 6a. The expanded sectional view which showed the whole of another example of the flooring using the buffer material for floors of this invention. The bottom view which shows the whole bottom face of the floor finishing material in the flooring using the floor cushioning material shown in FIG. 7a. The expanded sectional view which shows the base material for floors using the buffer material for floors of this invention. The expanded sectional view which shows another example of the base material for floors using the buffer material for floors of this invention. The expanded sectional view which shows another example of the base material for floors using the buffer material for floors of this invention. The graph which shows the measurement result of the light-weight floor impact sound noise level reduction amount (dB) about the floor structure using the flooring shown in FIG. 6a. The graph which shows the measurement result of the lightweight floor impact noise level reduction amount (dB) about the floor structure using the flooring shown in FIG. 7a. The graph which shows the measurement result of the light-weight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The graph which shows the measurement result of the light-weight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The graph which shows the measurement result of the light-weight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The expanded sectional view which shows the conventional floor structure. The expanded sectional view which shows another example of the conventional floor structure.

  Hereinafter, the floor cushioning material of the present invention, the floor material using the cushioning material, and the floor base material will be described in more detail with reference to the drawings. As shown in FIG. 1, the floor cushioning material 11 of the present invention comprises at least two flexible materials 12A and 12B and a polymer sheet 13 disposed between the flexible materials 12A and 12B. The at least two flexible members 12A and 12B in the floor cushioning material 11 of the present invention are made of materials having different spring constants. The spring constant is a numerical value that represents the degree of cushioning that acts as a cushion, receiving the load softly as a whole, and the lower the value, the greater the cushioning, and the higher, the smaller the cushioning. Specific examples of the flexible materials 12A and 12B having such a function include nonwoven fabrics, cloths, knitted fabrics, foamed resin sheets, and composites obtained by combining one or more of these.

  That the spring constants of the flexible material 12A and the flexible material 12B are different from each other means that the degree of cushioning (or the natural frequency) is different as described above. It can be realized by using different materials for the material 12A and the flexible material 12B, or by changing the thickness and weight per unit weight between the flexible material 12A and the flexible material 12B when the same material is used.

  Further, a high density (heavier) polymer sheet than the flexible materials 12A and 12B is disposed between the flexible material 12A and the flexible material 12B. For this reason, for example, the one flexible material 12A or the flexible material 12B having a natural frequency (spring constant) corresponding to the frequency of the light floor impact sound generated when the floor cushioning material 11 of the present invention receives a load resonates. However, the other flexible material 12B or the flexible material 12A having a different spring constant does not resonate, but the other flexible material is affected by the vibration propagated from the resonating one flexible material 12A or the flexible material 12B through the polymer sheet 13. The 12B or the flexible material 12A vibrates and acts to reduce the vibration of the one flexible material 12A or the flexible material 12B. Further, the polymer sheet 13 arranged between the flexible material 12A and the flexible material 12B propagates through the polymer sheet 13 from the resonating one flexible material 12A or the flexible material 12B and the one flexible material 12A or the flexible material 12B. Under the influence of the vibration, the other flexible material 12B or the flexible material 12A is overlapped with each other and acts to alleviate these vibrations. The flexible materials 12A, 12B and the polymer sheet 13 cooperate with each other. Thus, effective energy attenuation of floor impact sound is realized.

  In addition, the flexible materials 12A and 12B are respectively disposed on one surface side of the polymer sheet 13, but each of the flexible materials 12A and 12B is not limited to a single layer, and may be configured by a plurality of layers. In the case of an aspect composed of a plurality of layers, it means that the spring constants of the plurality of layers constituting the respective flexible members 12A and 12B are different, not the spring constants of the layers constituting the layers. When the same material is used for the flexible material 12A and the flexible material 12B, the spring constants of the plurality of layers as a whole may be different from each other, and the thickness and weight per unit area of the flexible materials 12A and 12B may be different. By using different materials, the flexible materials 12A and 12B having different spring constants can be obtained.

  In addition, the spring constant varies depending on the adhesive that bonds the flexible materials 12A and 12B to the polymer sheet 13, or in the case where the flexible materials 12A and 12B are formed of a plurality of layers, depending on the adhesive that bonds the layers. The spring constants of the flexible members 12A and 12B are preferably determined as appropriate in consideration of the amount and type of adhesive applied to each of the flexible members 12A and 12B.

  In the illustrated example, two non-woven fabrics having different thicknesses and areal weights were used as the flexible materials 12A and 12B, respectively. Each non-woven fabric includes a heat-adhesive fiber as a constituent fiber, and is integrated into the polymer sheet 13 by heat-pressing the polymer sheet 13 using heat fusion of the heat-adhesive fibers in the non-woven fabric. It has become so.

  As the polymer sheet 13, a material whose density is larger and heavier than the density of the at least two flexible materials 12A and 12B is used. By using such a polymer sheet 13, as described above, the floor cushioning material 11 of the present invention cooperates with the flexible material 12A, 12B and the polymer sheet 13 to generate the floor impact sound generated when a load is applied. Effectively attenuates.

  Further, since the polymer sheet 13 is harder than the flexible materials 12A and 12B, when placed between the flexible material 12A and the flexible material 12B, sinking due to the load of the floor cushioning material 11 is alleviated, and the floor surface during walking is reduced. It can improve the feeling of walking with the sunken and fluffy.

  Examples of the polymer constituting the polymer sheet 11 include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), acrylonitrile butadiene styrene copolymer (ABS), and acrylonitrile styrene copolymer. Examples thereof include one or two or more selected from coalescence (AS), polymethyl methacrylate (PMMA), chlorinated polyethylene (CPE), and ethylene vinyl acetate copolymer (EVA).

  The softening materials 12A and 12B and the polymer sheet 13 are composed of p- (p-toluenesulfonylamido) diphenylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, octylated diphenylamine, 2,2′-methylenebis ( 1 selected from 4-ethyl-6-tert-butylphenol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), and N, N′-di-2-naphthyl-p-phenylenediamine An embodiment including an organic damping material composed of a seed or two or more kinds of compounds (hereinafter referred to as the present compound) can also be adopted.

  The present compound is mixed with the softening materials 12A and 12B and the polymer constituting the polymer sheet 13 to form a dispersed phase in the matrix phase of the polymer, and generates a floor impact sound (vibration, sound) applied to the organic damping material. It functions to convert energy into heat and attenuate it. For this reason, in addition to the damping effect of the floor impact sound by the flexible materials 12A, 12B and the polymer sheet 13, by adding the present compound to the polymers constituting the flexible materials 12A, 12B and the polymer sheet 13, the energy conversion of the present compound The floor impact sound is attenuated more effectively.

  This dispersed phase exists in the matrix phase of the polymer as a dispersed phase in which the present compound is microphase-separated or as a completely compatible dispersed phase. Further, it is desirable that the dispersed phase is present in the matrix phase in an average size of 1 micron or less, more preferably an average of 0.1 micron or less in order to exhibit the energy conversion effect more effectively. .

The present compound constituting the dispersed phase is desirably contained in an amount of 1 to 200 parts by weight with respect to 100 parts by weight of the polymer constituting the matrix phase. When the content of the present compound is less than 1 part by weight, a sufficient energy conversion effect cannot be obtained, and when it exceeds 200 parts by weight, an energy conversion effect exceeding the range cannot be expected, which is uneconomical. Because it becomes.

  In addition, there are various types of energy of floor impact sound (vibration, sound), from low frequency range to high frequency range. Since the types are different, depending on the type of vibration or sound required, the polymer constituting the matrix phase or the present compound constituting the dispersed phase is selected and mixed to obtain the type of vibration or sound required. An organic damping material having a more reliable energy conversion effect according to the above can be obtained.

  Moreover, in addition to the above-mentioned components, viscoelasticity such as mica scale pieces, glass pieces, glass fibers, carbon fibers, calcium carbonate, barite, precipitated barium sulfate, and the like are included in the polymers constituting the flexible materials 12A and 12B and the polymer sheet 13. Conditioning substances, corrosion inhibitors, dyes, antioxidants, antistatic agents, stabilizers, wetting agents and the like can be added as needed.

  Next, a floor material using the floor cushioning material will be described. The flooring 21 shown in FIG. 2 shows a mode in which the floor cushioning material 11 is attached to the entire lower surface of the floor finishing material 22. In the case of this form, in this floor material 21, the floor cushioning material 11 is arranged between the floor finishing material 22 and the floor foundation 14, and therefore when a load is applied to the floor material 21. The generated floor impact sound propagates from the floor finishing material 22 to the floor cushioning material 11, and in the floor cushioning material 11, the flexible materials 12 </ b> A and 12 </ b> B and the polymer sheet 13 cooperate as described above to generate the floor impact sound. Effective energy attenuation is realized.

  The floor material 31 shown in FIG. 3 shows a mode in which the floor cushioning material 11 is partially attached to the lower surface of the floor finishing material 32. In the case of this form, the sound absorbing layers 33 are alternately arranged between the floor cushioning materials 11 on the lower surface of the floor finishing material 32, and when the flooring 31 is arranged on the floor foundation 14, the flooring 31 The floor impact sound generated when a load is applied to the floor simultaneously exhibits the effect of blocking the floor impact sound by the floor cushioning material 11 and the sound absorption effect by the sound absorbing layer 33.

  The flooring 41 shown in FIG. 4 shows an aspect in which the flooring material is separated into a surface material 42A and a main body 42B, and the floor cushioning material 11 is sandwiched between them. In the case of this form, the floor cushioning material 11 in the flooring 41 is disposed between the surface material 42A and the main body 42B, and the floor cushioning material 11 is not likely to drop off from the flooring 41, and the floor The floor impact sound generated when a load is applied to the material 41 propagates from the surface material 42A to the floor cushioning material 11, and in the floor cushioning material 11, the flexible materials 12A and 12B and the polymer sheet 13 are formed as described above. In cooperation with it, effective energy attenuation of floor impact sound is realized.

  The floor material 51 shown in FIG. 5 shows a mode in which the floor finishing material is separated into the surface material 52A and the main body 52B, and the floor cushioning material 11 is partially sandwiched between them, as in FIG. It is. In the case of this embodiment, the sound absorbing layers 53 are alternately arranged between the floor cushioning materials 11, and when this flooring 51 is placed on the floor foundation 14, a load is applied to the flooring 51. The floor impact sound generated at the same time exhibits the effect of blocking the floor impact sound by the floor cushioning material 11 and the sound absorption effect by the sound absorbing layer 53 simultaneously.

  The floor material 61 shown in FIGS. 6a and 6b employs a floor finishing material 62 in which a number of saw grooves 62a are provided on the lower surface side in the width direction and the length direction. The mode which the buffer material 11 for floors was distribute | arranged to the lower surface side whole surface of this is shown. Even in the floor material 61, the floor cushioning material 11 is disposed between the floor finishing material 62 and the floor foundation 14, so that a floor impact sound generated when a load is applied to the floor material 61. Propagates from the floor finishing material 62 to the floor cushioning material 11 where the flexible materials 12A, 12B and the polymer sheet 13 cooperate to effectively attenuate the floor impact sound as described above. Has come to be realized.

  The floor material 71 shown in FIGS. 7a and 7b is also a floor finishing material 72 in which a number of saw grooves 72a are provided on the lower surface side in the width direction and the length direction, similarly to the floor material shown in FIGS. 6a and 6b. The floor cushioning material 11 is arranged on the entire lower surface side of the floor finishing material 72. Even in the floor material 71, the floor cushioning material 11 is disposed between the floor finishing material 72 and the floor foundation 14. Therefore, a floor impact sound generated when a load is applied to the floor material 71. Propagates from the floor finishing material 72 to the floor cushioning material 11 where the flexible materials 12A, 12B and the polymer sheet 13 cooperate to effectively attenuate the floor impact sound as described above. Has come to be realized.

  Next, the floor base material using the floor cushioning material of the present invention will be described. The floor base material 81 shown in FIG. 8 shows a mode in which the sound insulation sheet 83 is arranged on the upper surface of the wooden board 82 and the floor cushioning material 11 is partially attached to the lower surface side of the wooden board 82. . When the floor base material 81 is disposed on the floor foundation 14, the sound insulation sheet 83 on the top surface of the wooden board 82 blocks the floor impact sound transmitted from the floor material (not shown) and the bottom surface of the wooden board 82. The floor cushioning material 11 partially disposed on the side effectively attenuates the floor impact sound transmitted from the wooden boat 82. Examples of wood boards include particle boards and hard boards. Among them, the particle board is preferable because it is excellent in sound insulation and heat insulation in addition to strength.

  The floor base material 91 shown in FIG. 9 has the floor cushioning material 11 disposed on the upper surface side of the wooden board 92 instead of the sound insulating sheet, and the floor cushioning material 11 is partially pasted on the lower surface side of the wooden board 92. An embodiment is shown. In the case of this floor base material 91, when the floor base material 91 is arranged on the floor foundation 14, the floor impact sound propagated from the floor material (not shown) is partially applied to the entire upper surface side and the lower surface side of the wooden board 92. The floor cushioning material 11 that is placed on the floor is effectively attenuated.

  The floor base material 101 shown in FIG. 10 has a floor cushioning material 11 disposed on the upper surface side of the wooden board 102 in place of the sound insulation sheet, and a sound absorbing layer 103 made of urethane chips partially on the lower surface side of the wooden board 102. The arrangement | positioning aspect is shown. In the case of this floor base material 101, when the floor base material 101 is disposed on the floor foundation 14, the floor impact sound propagated from the floor material (not shown) is disposed on the entire upper surface side of the wooden board 102. The buffer material 11 is effectively attenuated.

  In addition, this invention is not limited to the example shown in drawing, For example, the thing with a low spring constant is distribute | arranged to the soft material of the surface material side of the buffer material 11 for floors, and a high spring constant is provided to the soft material of the lower surface side. It can be implemented with any modification within the scope of the claims.

Hereinafter, the floor cushioning material of the present invention, the flooring material using the same, and the floor base material will be described in more detail based on examples.
Example 1
Prepare two non-woven fabrics X, Y and polymer sheets with different spring constants, arrange the polymer sheets between the non-woven fabrics X, Y, and integrate the three through an adhesive. Got.
Nonwoven fabric X: length 908 mm, width 89 mm, thickness 4 mm, polyester fiber nonwoven fabric with a basis weight of 250 g / m ² , spring constant 3.0 N / mm, density 0.063 g / cm ³ , nonwoven fabric Y: length 908 mm, width 89 mm, thickness 2 mm, polyester fiber nonwoven fabric with a basis weight of 200 g / m ² , spring constant of 2.4 N / mm, density of 0.1 g / cm ³ , polypropylene sheet: thickness of 1 mm, density of 0.98 g / cm ³ ,
Adhesion of nonwoven fabric X to polymer sheet: Adhesive Urethane adhesive, adhesion amount 30 g / m ² Adhesion of nonwoven fabric Y to polymer sheet: Adhesive Urethane adhesive, adhesion amount 30 g / m ² .

  Next, as shown in FIGS. 6a and 6b, on the lower surface side of a solid cedar flooring material having a width of 90 mm and a length of 910 mm, a vertical groove having a width of 12 mm and a depth of 2 mm and an interval of 30 mm, and a width of 2 mm and a depth of A floor finishing material 62 provided with saw grooves 62a each having a width of 9 mm and 10 mm intervals is prepared, and the floor cushioning material 11 is attached to the lower surface side of the floor finishing material 62 via an adhesive. A material 61 was produced.

  Next, as shown in FIG. 6 a, the floor material 61 was fixed on the floor foundation 14 to produce a floor structure. The obtained floor structure conforms to JIS A-1440-1: 2007 “Measurement method of floor impact sound level reduction of floor finish structure on concrete floor in laboratory—Part 1: Method using standard lightweight impact source”. The light floor impact noise level reduction (dB) at the center frequency of the octave band was measured. The obtained results are shown in FIG.

Example 2
Next, as shown in FIGS. 7a and 7b, on the back side of a solid flooring material having a width of 90 mm and a length of 910 mm, a vertical groove having a width of 5 mm and a depth of 3 mm and an interval of 5 mm, a width of 1.8 mm and a depth of The floor finishing material 72 provided with saw grooves 72a each having a length of 5 mm and 110 mm intervals is prepared, and the floor cushioning material 11 shown in the first embodiment is attached to the lower surface of the floor finishing material 72 via an adhesive. A material 71 was produced.

  Next, as shown in FIG. 7 a, the floor material 71 was fixed on the floor foundation 14 to produce a floor structure. The obtained floor structure conforms to JIS A-1440-1: 2007 “Measurement method of floor impact sound level reduction of floor finish structure on concrete floor in laboratory—Part 1: Method using standard lightweight impact source”. The light floor impact noise level reduction (dB) at the center frequency of the octave band was measured. The obtained results are shown in FIG.

  From the measurement results shown in FIGS. 11 and 12, it was confirmed that each of the floor structures shown in Examples 1 and 2 has an excellent lightweight floor impact sound attenuation performance that exceeds LL-45.

Moreover, about each floor structure of the said Example 1 and 2, five panelists walk,
A judgment: There is a slight feeling of sinking during walking B judgment: There is a slight fluffy feeling C judgment: There is a fluffy feeling D judgment: There is a considerable fluffy feeling, and the average was taken As a result, both were judged as A or B, and it was confirmed that moderate walking feeling was maintained.

Example 3
Next, as shown in FIG. 8, a sound insulation sheet 83 is disposed on the upper side surface of the wooden boat 82 made of particle board, and the floor cushioning material 11 shown in the first embodiment is partially spaced on the lower side of the wooden board 82. Attached and placed on the floor foundation 14. Further, the floor finishing material shown in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, the space between the floor cushioning material 11 and the floor cushioning material 11 disposed partially was filled with a non-woven fabric made of polyester (thickness 10 mm), which is mainly a product. The amount of noise level reduction by this nonwoven fabric is negligible and may be carried out without filling the space with the nonwoven fabric.
For this floor structure, the light floor impact noise level reduction amount (dB) was measured in the same manner as in Example 1. The obtained results are shown in FIG.

Example 4
Next, as shown in FIG. 9, the floor cushioning material 11 shown in Example 1 is attached to the entire upper surface side and a part of the lower surface side of the wood board 92 made of particle board to produce the floor base material 91. This was placed on the floor foundation 14. Furthermore, the floor finishing material used in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, the space between the floor cushioning material 11 and the floor cushioning material 11 disposed partially was filled with a non-woven fabric made of polyester (thickness 10 mm), which is mainly a product. The amount of noise level reduction by this nonwoven fabric is negligible and may be carried out without filling the space with the nonwoven fabric.
For this floor structure, the light floor impact noise level reduction amount (dB) was measured in the same manner as in Example 1. The obtained results are shown in FIG.

Example 5
Next, as shown in FIG. 10, a sound absorbing layer 103 partially made of urethane chips is disposed on the lower surface side of the wooden board 102 made of particle board, and the floor surface shown in the first embodiment is entirely formed on the upper surface side of the wooden board 102. The buffer material 11 was affixed to produce a floor base material 101, which was placed on the floor foundation 14. The floor finishing material shown in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, although the space between the said sound-absorbing layer 103 and the sound-absorbing layer 103 arrange | positioned partially was filled with the nonwoven fabric (thickness 10mm) made from polyester, this is mainly on the external appearance as a product. For this reason, the amount of noise level reduction by this non-woven fabric is negligible, and the non-woven fabric may be used without filling the space.
For this floor structure, the light floor impact noise level reduction amount (dB) was measured in the same manner as in Example 1. The obtained results are shown in FIG.

  From the measurement results shown in FIGS. 13 to 15, it was confirmed that each of the floor structures of Examples 3 and 4 had excellent lightweight floor impact sound attenuation performance exceeding LL-45. On the other hand, for the floor structure shown in Example 5, an evaluation result of LL-40 was obtained. In addition, in the case of this floor base material, its weight is about half that of those shown in Examples 3 and 4, so that handling properties such as transportation and assembly are good, together with excellent floor impact sound attenuation performance. It was confirmed that it is extremely useful as a floor base material having good handleability.

Moreover, also about each floor structure of the said Examples 3-5, like Example 1 and 2, five panelists walk,
A judgment: There is a slight feeling of sinking during walking B judgment: There is a slight fluffy feeling C judgment: There is a fluffy feeling D judgment: There is a considerable fluffy feeling, and the average was taken As a result, both were judged as A or B, and it was confirmed that moderate walking feeling was maintained.

The present invention, while maintaining a moderate walking feeling, moreover relates excellent light floor impact sound damping performance and floor base materials that can be given the weight floor impact sound damping performance.

  Conventionally, in an apartment house or a detached house, in the case of a floor structure in which a hard wooden floor finish material is directly pasted on a concrete slab, the insulation against floor impact sound is inferior, and improvement thereof has been demanded.

  Therefore, in order to improve the floor impact sound downstairs, a construction method has been adopted in which a floor material in which a wooden board and a cushioning material such as a nonwoven fabric are combined is directly bonded to the slab surface.

  However, cushioning materials such as non-woven fabrics are soft and can attenuate the floor impact sound immediately after construction, but if the cushioning property is increased, the floor surface sinks by walking and gives a feeling of walking. On the other hand, when the thickness of the cushioning material is reduced with time and the cushioning property is lowered along with this, the fluffy feeling during walking is improved, but the floor impact sound attenuation performance is reduced as the cushioning property is lowered. Under such circumstances, there has been a demand for a flooring material that retains an appropriate walking feeling and that has excellent floor impact sound attenuation performance.

For example, the floor structure shown in FIG. 8 has been proposed as a floor structure that pays attention to such technical problems and takes countermeasures. The floor structure shown in FIG. 8 is a floor structure in which a soundproof floor base material 8 is disposed between the floor material base 6 and the floor material 7, and the soundproof floor base material 8 penetrates between the upper and lower surfaces. and the expanded sheet 9 formed with a through-hole and is characterized in that it consists of non-woven fabric 10 for laminated on at least one of the upper and lower surfaces of the foamed sheet 9 (Patent Document 1 see).

JP 2010-53559 A

However, the floor structure shown in FIG. 8, although those having a proper degree of walking feeling, has not been put into obtaining excellent floor impact sound damping performance. The inventors of the present invention have completed the present invention as a result of further earnest research on a floor base material having an appropriate walking feeling and having excellent lightweight floor impact sound attenuation performance and heavy floor impact sound attenuation performance. It is what led to it.

That is, the present invention aims at providing an appropriate while retaining the walking feeling, yet excellent light floor impact sound damping performance and floor base materials that can be given the weight floor impact sound damping performance It is.

In order to achieve the above object, the invention according to claim 1 comprises at least two flexible materials having different spring constants and a polymer sheet disposed between the flexible materials, and the density of the polymer sheet is at least the at least one. The floor cushioning material is characterized in that it is larger than the density of the two flexible materials and the product of the spring constant and the thickness of each flexible material in the at least two flexible materials is different from each other. The base material for flooring is the gist.

The gist of the invention according to claim 2 is that the floor base material according to claim 1 is characterized in that at least two flexible materials having different spring constants are each made of a nonwoven fabric.

The invention according to claim 3 includes p- (p-toluenesulfonylamido) diphenylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, octylation in at least one of the softener and the polymer sheet. Diphenylamine, 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), and N, N′-di-2-naphthyl- The base material for floors according to claim 1 or 2 characterized in that one or more compounds selected from p-phenylenediamine are contained.

The invention according to claim 4 is characterized in that the floor cushioning material is arranged on the whole or part of the lower surface of the floor base material. The basic material was the gist.

The gist of the floor base material according to any one of claims 1 to 4, wherein the floor cushioning material is disposed on the upper surface of the floor base material. It was.

The floor base material of the present invention comprises at least two flexible materials having different spring constants and a polymer sheet disposed between the flexible materials, and the density of the polymer sheet is the density of the at least two flexible materials. The floor cushioning material in which the product of the spring constant and the thickness of each flexible material in the at least two flexible materials is different from each other is used , and it is excellent while maintaining an appropriate walking feeling. The light weight floor impact sound attenuation performance and the heavy floor impact sound attenuation performance are provided.

The expanded sectional view which showed the buffer material for floors of this invention. The expanded sectional view which shows the base material for floors using the buffer material for floors of this invention. The expanded sectional view which shows another example of the base material for floors using the buffer material for floors of this invention. The expanded sectional view which shows another example of the base material for floors using the buffer material for floors of this invention. The graph which shows the measurement result of the light-weight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The graph which shows the measurement result of the lightweight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The graph which shows the measurement result of the lightweight floor impact sound noise level reduction amount (dB) about the floor structure using the base material for floors shown in FIG. The expanded sectional view which shows the conventional floor structure.

Hereinafter, the floor base material of the present invention will be described in more detail with reference to the drawings. The floor base material of the present invention is characterized by using a floor cushioning material. As shown in FIG. 1, the floor cushioning material 11 comprises at least two flexible materials 12A and 12B and a polymer sheet 13 disposed between the flexible materials 12A and 12B. The at least two flexible members 12A, 12B in the floor cushioning material 11 are made of materials having different spring constants. The spring constant is a numerical value that represents the degree of cushioning that acts as a cushion, receiving the load softly as a whole, and the lower the value, the greater the cushioning, and the higher, the smaller the cushioning. Specific examples of the flexible materials 12A and 12B having such a function include nonwoven fabrics, cloths, knitted fabrics, foamed resin sheets, and composites obtained by combining one or more of these.

  That the spring constants of the flexible material 12A and the flexible material 12B are different from each other means that the degree of cushioning (or the natural frequency) is different as described above. It can be realized by using different materials for the material 12A and the flexible material 12B, or by changing the thickness and weight per unit weight between the flexible material 12A and the flexible material 12B when the same material is used.

  Further, a high density (heavier) polymer sheet than the flexible materials 12A and 12B is disposed between the flexible material 12A and the flexible material 12B. For this reason, for example, the one flexible material 12A or the flexible material 12B having a natural frequency (spring constant) corresponding to the frequency of the light floor impact sound generated when the floor cushioning material 11 of the present invention receives a load resonates. However, the other flexible material 12B or the flexible material 12A having a different spring constant does not resonate, but the other flexible material is affected by the vibration propagated from the resonating one flexible material 12A or the flexible material 12B through the polymer sheet 13. The 12B or the flexible material 12A vibrates and acts to reduce the vibration of the one flexible material 12A or the flexible material 12B. Further, the polymer sheet 13 arranged between the flexible material 12A and the flexible material 12B propagates through the polymer sheet 13 from the resonating one flexible material 12A or the flexible material 12B and the one flexible material 12A or the flexible material 12B. Under the influence of the vibration, the other flexible material 12B or the flexible material 12A is overlapped with each other and acts to alleviate these vibrations. The flexible materials 12A, 12B and the polymer sheet 13 cooperate with each other. Thus, effective energy attenuation of floor impact sound is realized.

  In addition, the flexible materials 12A and 12B are respectively disposed on one surface side of the polymer sheet 13, but each of the flexible materials 12A and 12B is not limited to a single layer, and may be configured by a plurality of layers. In the case of an aspect composed of a plurality of layers, it means that the spring constants of the plurality of layers constituting the respective flexible members 12A and 12B are different, not the spring constants of the layers constituting the layers. When the same material is used for the flexible material 12A and the flexible material 12B, the spring constants of the plurality of layers as a whole may be different from each other, and the thickness and weight per unit area of the flexible materials 12A and 12B may be different. By using different materials, the flexible materials 12A and 12B having different spring constants can be obtained.

  In addition, the spring constant varies depending on the adhesive that bonds the flexible materials 12A and 12B to the polymer sheet 13, or in the case where the flexible materials 12A and 12B are formed of a plurality of layers, depending on the adhesive that bonds the layers. The spring constants of the flexible members 12A and 12B are preferably determined as appropriate in consideration of the amount and type of adhesive applied to each of the flexible members 12A and 12B.

  In the illustrated example, two non-woven fabrics having different thicknesses and areal weights were used as the flexible materials 12A and 12B, respectively. Each non-woven fabric includes a heat-adhesive fiber as a constituent fiber, and is integrated into the polymer sheet 13 by heat-pressing the polymer sheet 13 using heat fusion of the heat-adhesive fibers in the non-woven fabric. It has become so.

  As the polymer sheet 13, a material whose density is larger and heavier than the density of the at least two flexible materials 12A and 12B is used. By using such a polymer sheet 13, as described above, the floor cushioning material 11 of the present invention cooperates with the flexible material 12A, 12B and the polymer sheet 13 to generate the floor impact sound generated when a load is applied. Effectively attenuates.

  Further, since the polymer sheet 13 is harder than the flexible materials 12A and 12B, when placed between the flexible material 12A and the flexible material 12B, sinking due to the load of the floor cushioning material 11 is alleviated, and the floor surface during walking is reduced. It can improve the feeling of walking with the sunken and fluffy.

  Examples of the polymer constituting the polymer sheet 11 include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), acrylonitrile butadiene styrene copolymer (ABS), and acrylonitrile styrene copolymer. Examples thereof include one or two or more selected from coalescence (AS), polymethyl methacrylate (PMMA), chlorinated polyethylene (CPE), and ethylene vinyl acetate copolymer (EVA).

  The softening materials 12A and 12B and the polymer sheet 13 are composed of p- (p-toluenesulfonylamido) diphenylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, octylated diphenylamine, 2,2′-methylenebis ( 1 selected from 4-ethyl-6-tert-butylphenol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), and N, N′-di-2-naphthyl-p-phenylenediamine An embodiment including an organic damping material composed of a seed or two or more kinds of compounds (hereinafter referred to as the present compound) can also be adopted.

  The present compound is mixed with the softening materials 12A and 12B and the polymer constituting the polymer sheet 13 to form a dispersed phase in the matrix phase of the polymer, and generates a floor impact sound (vibration, sound) applied to the organic damping material. It functions to convert energy into heat and attenuate it. For this reason, in addition to the damping effect of the floor impact sound by the flexible materials 12A, 12B and the polymer sheet 13, by adding the present compound to the polymers constituting the flexible materials 12A, 12B and the polymer sheet 13, the energy conversion of the present compound The floor impact sound is attenuated more effectively.

  This dispersed phase exists in the matrix phase of the polymer as a dispersed phase in which the present compound is microphase-separated or as a completely compatible dispersed phase. Further, it is desirable that the dispersed phase is present in the matrix phase in an average size of 1 micron or less, more preferably an average of 0.1 micron or less in order to exhibit the energy conversion effect more effectively. .

The present compound constituting the dispersed phase is desirably contained in an amount of 1 to 200 parts by weight with respect to 100 parts by weight of the polymer constituting the matrix phase. When the content of the present compound is less than 1 part by weight, a sufficient energy conversion effect cannot be obtained, and when it exceeds 200 parts by weight, an energy conversion effect exceeding the range cannot be expected, which is uneconomical. Because it becomes.

  In addition, there are various types of energy of floor impact sound (vibration, sound), from low frequency range to high frequency range. Since the types are different, depending on the type of vibration or sound required, the polymer constituting the matrix phase or the present compound constituting the dispersed phase is selected and mixed to obtain the type of vibration or sound required. An organic damping material having a more reliable energy conversion effect according to the above can be obtained.

  Moreover, in addition to the above-mentioned components, viscoelasticity such as mica scale pieces, glass pieces, glass fibers, carbon fibers, calcium carbonate, barite, precipitated barium sulfate, and the like are included in the polymers constituting the flexible materials 12A and 12B and the polymer sheet 13. Conditioning substances, corrosion inhibitors, dyes, antioxidants, antistatic agents, stabilizers, wetting agents and the like can be added as needed.

Next, the floor base material using the floor cushioning material will be described. The floor base material 81 shown in FIG. 2 shows a mode in which a sound insulation sheet 83 is arranged on the upper surface of the wooden board 82 and the floor cushioning material 11 is partially attached to the lower surface side of the wooden board 82. . When the floor base material 81 is disposed on the floor foundation 14, the sound insulation sheet 83 on the top surface of the wooden board 82 blocks the floor impact sound transmitted from the floor material (not shown) and the bottom surface of the wooden board 82. The floor cushioning material 11 partially disposed on the side effectively attenuates the floor impact sound transmitted from the wooden boat 82. Examples of wood boards include particle boards and hard boards. Among them, the particle board is preferable because it is excellent in sound insulation and heat insulation in addition to strength.

The floor base material 91 shown in FIG. 3 has the floor cushioning material 11 disposed on the upper surface side of the wooden board 92 instead of the sound insulation sheet, and the floor cushioning material 11 is partially pasted on the lower surface side of the wooden board 92. An embodiment is shown. In the case of this floor base material 91, when the floor base material 91 is arranged on the floor foundation 14, the floor impact sound propagated from the floor material (not shown) is partially applied to the entire upper surface side and the lower surface side of the wooden board 92. The floor cushioning material 11 that is placed on the floor is effectively attenuated.

The floor base material 101 shown in FIG. 4 has a floor cushioning material 11 disposed on the upper surface side of the wooden board 102 in place of the sound insulation sheet, and a sound absorbing layer 103 made of urethane chips partially on the lower surface side of the wooden board 102. The arrangement | positioning aspect is shown. In the case of this floor base material 101, when the floor base material 101 is disposed on the floor foundation 14, the floor impact sound propagated from the floor material (not shown) is disposed on the entire upper surface side of the wooden board 102. The buffer material 11 is effectively attenuated.

  In addition, this invention is not limited to the example shown in drawing, For example, the thing with a low spring constant is distribute | arranged to the soft material of the surface material side of the buffer material 11 for floors, and a high spring constant is provided to the soft material of the lower surface side. It can be implemented with any modification within the scope of the claims.

Hereinafter, the floor base material of the present invention will be described in more detail based on examples.
Example 1
Prepare two non-woven fabrics X, Y and polymer sheets with different spring constants, arrange the polymer sheets between the non-woven fabrics X, Y, and integrate the three through an adhesive. Got.
Nonwoven fabric X: length 908 mm, width 89 mm, thickness 4 mm, polyester fiber nonwoven fabric with a basis weight of 250 g / m ² , spring constant 3.0 N / mm, density 0.063 g / cm ³ , nonwoven fabric Y: length 908 mm, width 89 mm, thickness 2 mm, polyester fiber nonwoven fabric with a basis weight of 200 g / m ² , spring constant of 2.4 N / mm, density of 0.1 g / cm ³ , polypropylene sheet: thickness of 1 mm, density of 0.98 g / cm ³ ,
Adhesion of nonwoven fabric X to polymer sheet: Adhesive Urethane adhesive, adhesion amount 30 g / m ² Adhesion of nonwoven fabric Y to polymer sheet: Adhesive Urethane adhesive, adhesion amount 30 g / m ² .

Next, as shown in FIG. 2, a sound insulation sheet 83 is disposed on the upper side surface of the wooden boat 82 made of particle board, and the floor cushioning material 11 shown in the first embodiment is partially spaced on the lower surface side of the wooden board 82. Attached and placed on the floor foundation 14. Further, the floor finishing material shown in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, the space between the floor cushioning material 11 and the floor cushioning material 11 disposed partially was filled with a non-woven fabric made of polyester (thickness 10 mm), which is mainly a product. The amount of noise level reduction by this nonwoven fabric is negligible and may be carried out without filling the space with the nonwoven fabric.
For this floor structure , octave according to JIS A-1440-1: 2007 “Measurement method of floor impact sound level reduction of floor finish structure on concrete floor in laboratory—Part 1: Method using standard lightweight impact source” The light floor impact noise level reduction (dB) at the band center frequency was measured. The obtained results are shown in FIG .

Example 2
Next, as shown in FIG. 3, the floor cushioning material 11 shown in Example 1 is attached to the entire upper surface side and a part of the lower surface side of the wood board 92 made of particle board to produce a floor base material 91. This was placed on the floor foundation 14. Furthermore, the floor finishing material used in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, the space between the floor cushioning material 11 and the floor cushioning material 11 disposed partially was filled with a non-woven fabric made of polyester (thickness 10 mm), which is mainly a product. The amount of noise level reduction by this nonwoven fabric is negligible and may be carried out without filling the space with the nonwoven fabric.
For this floor structure, the light floor impact noise level reduction amount (dB) was measured in the same manner as in Example 1. The obtained results are shown in FIG .

Example 3
Next, as shown in FIG. 4, a sound absorbing layer 103 partially made of urethane chips is disposed on the lower surface side of the wooden board 102 made of particle board, and the floor surface shown in the first embodiment is entirely formed on the upper surface side of the wooden board 102. The buffer material 11 was affixed to produce a floor base material 101, which was placed on the floor foundation 14. The floor finishing material shown in Example 1 was placed on the floor base material 81 to produce a floor structure.
In addition, although the space between the said sound-absorbing layer 103 and the sound-absorbing layer 103 arrange | positioned partially was filled with the nonwoven fabric (thickness 10mm) made from polyester, this is mainly on the external appearance as a product. For this reason, the amount of noise level reduction by this non-woven fabric is negligible, and the non-woven fabric may be used without filling the space.
For this floor structure, the light floor impact noise level reduction amount (dB) was measured in the same manner as in Example 1. The obtained results are shown in FIG .

From the measurement results shown in FIGS. 5 to 7, it was confirmed that each of the floor structures of Examples 1 and 2 has an excellent lightweight floor impact sound attenuation performance that exceeds LL-45. On the other hand, for the floor structure shown in Example 3, an evaluation result of LL-40 was obtained. In addition, in the case of this floor base material, its weight is about half that of those shown in Examples 1 and 2 , so that handling properties such as transportation and assembly are good, together with excellent floor impact sound attenuation performance. It was confirmed that it is extremely useful as a floor base material having good handleability.

Moreover, about each floor structure of the said Examples 1-3, five panelists walk,
A judgment: There is a slight feeling of sinking during walking B judgment: There is a slight fluffy feeling C judgment: There is a fluffy feeling D judgment: There is a considerable fluffy feeling, and the average was taken As a result, both were judged as A or B, and it was confirmed that moderate walking feeling was maintained.

The present invention is industrially applicable as a floor base material.

11 Floor cushioning material
12A flexible material
12B flexible material
13 Polymer sheet
14 Floor foundation
81 Floor material
82 Wood board
83 Sound insulation sheet
91 Floor material
92 Wood board
101 Floor material
102 Wood board
103 Sound absorbing layer

Claims (10)

  It consists of at least two flexible materials having different spring constants and a polymer sheet disposed between the flexible materials, and the density of the polymer sheet is larger than the density of the at least two flexible materials, and the at least two sheets A floor cushioning material characterized in that the products of the spring constant and thickness of each of the flexible materials in the flexible material are different from each other.   2. The floor cushioning material according to claim 1, wherein at least two flexible materials having a spring constant are made of nonwoven fabric.   In at least one of the softener and the polymer sheet, p- (p-toluenesulfonylamidodiphenylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, octylated diphenylamine, 2,2′-methylenebis (4 -Ethyl-6-tert-butylphenol), 4,4′-thiobis (3-methyl-6-tert-butylphenol), and N, N′-di-2-naphthyl-p-phenylenediamine Or the 2 or more types of compound is contained, The floor cushioning material of Claim 1 or 2 characterized by the above-mentioned.   A flooring material using the floor cushioning material according to any one of claims 1 to 3.   The flooring material according to claim 4, wherein a floor cushioning material is disposed on the entire or part of the lower surface of the flooring material.   The flooring material according to claim 4, wherein the flooring material comprises a surface material and a main body portion, and a floor cushioning material is disposed between the surface material and the main body portion.   The flooring material according to claim 6, wherein a floor cushioning material is partially disposed between the surface material and the main body.   A floor base material according to any one of claims 1 to 3, wherein the floor cushioning material is used.   9. The floor base material according to claim 8, wherein a floor cushioning material is disposed on the entire or part of the lower surface of the floor base material.   The floor base material according to claim 8 or 9, wherein a floor cushioning material is disposed on an upper surface of the floor base material.

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