JPH0760888A - Soundproof structure and soundproof floor having the same incorporated therein - Google Patents

Abstract

PURPOSE:To provide not only a lightweight soundproof structure having proper hardness excellent in soundproof properties even if reduced in thickness but also a soundproof floor having proper hardness when standing on the floor, excellent in soundproof properties, capable of being reduced in thickness and excellent in durability generating no creeping. CONSTITUTION:A soundproof structure is formed by laminating plastic foam (A) with 25% compression strength of 0.9kg/cm<2> or less and density of 0.09g/cm<3> or less and plastic foam (B) with 25% compression strength of 1.5kg/cm<2> or more and density of 0.1-0.2g/cm<3> in the order of (A)/(B) or (A)/(B)/(A). This soundproof structure is provided between an upper wooden floor panel and a floor substrate to form a soundproof floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof structure and a soundproof floor incorporating the same.

[0002]

2. Description of the Related Art When a relatively hard material such as wood or synthetic resin is used as a finishing material for a floor substrate such as a concrete slab, it causes noise in daily life, especially when an apartment such as a condominium is dropped on the floor. The impact sound is transmitted to the downstairs as a solid sound, which causes a large amount of noise. Therefore, various elastic bodies have been developed and used as soundproofing means for effectively absorbing these impact sounds. However, if a soft and thick elastic body is laid on the floor base and a relatively hard wood-based material is used as the finishing material, the weighted part will be distorted or it will sink considerably when standing on the floor. I was concerned about the softness of the wood, resulting in the loss of the original hardness of wood. Moreover, when a porous fiber such as felt is used for the elastic body,
There is a possibility that the felt or the like will absorb moisture due to the moisture under the floor to reduce the buffering property and cause creep or the like to sink the floor. In addition, as one of soundproofing means, Japanese Patent Laid-Open No. 4-22
A double floor structure as described in Japanese Patent No. 1168 is known. This double-floor structure is highly soundproof and convenient for laying wiring or piping in the space under the floor, but there is a restriction on the floor height due to its structure, and it is not suitable for high-rise houses such as condominiums. Not suitable.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a soundproof structure which has appropriate hardness, is light in weight, and is excellent in soundproofing even if it is thin. The present invention is
It is another object of the present invention to provide a soundproof floor which has excellent hardness and soundproofing when standing on the floor, can reduce the thickness of the floor, and has excellent durability such as no creep.

[0004]

The present invention has been made based on the finding that the above problems can be efficiently solved by laminating two specific types of plastic foams having different compressive strengths and densities. That is, the present invention is (A) 25%
A plastic foam having a compressive strength of 0.9 kg / cm ² or less and a density of 0.09 g / cm ³ or less, and (B) 25% compressive strength of 1.5.
(A) / (B) or (A) / (B) / a plastic foam having a density of 0.1 to 0.2 g / cm ^{3 at} a weight of Kg / cm ² or more.
There is provided a soundproof structure characterized by being laminated in the order of (A). The present invention also provides a soundproof floor characterized in that the soundproof structure is provided between an upper wooden floorboard and a floor base.

Foam forming the soundproof structure of the present invention
As (A), 25% compressive strength is 0.9 kg / cm² Below
Density is 0.09g / cm³Use any foam if
Can be used. Such foams are, for example,
Polyurethane, polystyrene, polyolefin (mainly
Polyethylene, polypropylene, ethylene-vinyl acetate
Copolymer), phenolic resin, polyvinyl chloride resin,
Urea resin, polyethylene terephthalate, polybutyle
Terephthalate, polycarbonate, epoxy resin,
Resin such as ABS resin, silicone resin, nylon resin
Used to foam 12 to 30 times by a conventionally known foaming method
Can be manufactured. Of these, especially
Tylene-vinyl acetate copolymer (VA content 2-15
%) And low density polyethylene are preferred. Also, the above foam
May be obtained by foaming only the resin, but
2 inorganic powders such as lucium, talc and calcium sulfate
The foamed plastic containing more than 5% by weight
Preferably, more preferably 20 to 50% by weight of inorganic powder
What is contained is preferable. More preferred inorganic powder is charcoal
Calcium acid, especially calcium carbonate with an average particle size of 0.2-1.0μ
It is sium. Furthermore, the foam has a pressure of 25%.
Shrinkage strength is 0.05-0.9Kg / cm² And the density is 0.02 to 0.09
g / cm³Those of 0.1 to 0.6 are most preferable.
Kg / cm ² With a density of 0.05-0.08g / cm³Of
It Here, the 25% compressive strength is JIS K 6767.
It can be easily measured by the method.

As the foam (B) constituting the soundproof structure of the present invention, 25% compressive strength of 1.5 Kg / cm ² or more and density of 0.1 to 0.2 g / cm ³ are optional. Foams of can be used. Such a foam can be formed by using the same resin as described for the foam (A) and changing the expansion ratio. Specifically, it is preferable to set the expansion ratio to 2 to 10 times. Among these resins, linear low density polyethylene, ethylene-vinyl acetate copolymer (VA content 2 to 15%) and low density polyethylene are particularly preferable. Most preferably, the resin used is 50% by weight or more of linear low-density polyethylene and the balance is 100% by weight of ethylene-vinyl acetate copolymer and / or low-density polyethylene, or linear low-density polyethylene. Further, the above foam may be obtained by foaming only a resin, but it is preferable to foam a plastic containing 25% by weight or more of inorganic powder such as calcium carbonate, talc and calcium sulfate, and more preferably. Those containing 20 to 50% by weight of the inorganic powder are preferable.
A more preferable inorganic powder is calcium carbonate, particularly calcium carbonate having an average particle size of 0.2 to 1.0 μ. Furthermore, the above foam has a 25% compressive strength of 1.5 to 10 kg / cm.
² and a density of 0.1 to 0.2 g / cm ³ are preferred, most preferably 2.5 to 4.0 Kg / cm ² and a density of 0.12 to 0.18.
It is of g / cm ³ .

In the present invention, the above-mentioned foams (A) and (B) are basically laminated in the order of (A) / (B) or (A) / (B) / (A). Therefore, various structures can be made based on this basic principle. For example,
(A) / (B) / (A) / (B) four-layer structure; (A)
/ (B) / (A) / (B) / (A) 5-layer structure;
6 of (A) / (B) / (A) / (B) / (A) / (B)
Layer structure; (A) / (B) / (A) / (B) / (A) /
(B) / (A) 7-layer structure; (A) / (B) / (A)
An 8-layer structure of / (B) / (A) / (B) / (A) / (B). The thickness of the soundproof structure of the present invention may be any thickness in consideration of the required soundproofing characteristics and strength, but it is preferably 3 to 17 mm, preferably 9 to 15 mm. The thickness of each foam (A) and (B) is (A) 1-3 mm, (B) 2-12 mm, preferably (A) 1.1-2.2 mm, (B) 6-12 mm. The total thickness of the foam (A) / the total thickness of the foam (B) in the soundproof structure is 1/1 to 1/12, preferably 1
It is preferable to set it to / 4 to 1/7. In the soundproof structure of the present invention, the foams (A) and (B) may be simply formed by weighting them in the order described above, or an arbitrary means such as an adhesive may be used between the foams. Alternatively, they may be fixed by using mechanical joining means.

The present invention also provides a soundproof floor in which the above soundproof structure is provided between an upper wooden floorboard and a floor base. Here, as the upper wood floor board provided on the soundproof structure of the present invention, wood board, plywood, laminated board of plastic sheet and plywood, decorative board, inorganic composite wood, wood-plastic composite (WPC) and the like. can give. The thickness of the upper wooden floor board may be arbitrary, but it is preferable to use one having a thickness of 2 to 5 mm, preferably 2 to 3 mm. Examples of the floor substrate include conventionally known floor substrates such as concrete slabs, stone materials, and ALC.

A preferred soundproof floor is an upper wooden floorboard /
(A) / (B) / floor substrate or upper wooden floorboard / (A) /
(B) / (A) / floor base, but upper wood floorboard /
(B) / (A) / floor substrate can also be used. Further, in the above structure, a moistureproof layer or the like may be provided between the upper wooden floor board or floor base and the foam. Further, as the foam layer, the above-mentioned 4 to 8 layer structure can be used. The layers constituting the soundproof floor can be fixed using any of the above-described methods, adhesives (vinyl adhesive, rubber adhesive, epoxy adhesive, etc.) or mechanical joining means. Among the above-mentioned various aspects, as the soundproof floor, one having a structure of upper wood floorboard / (A) / (B) / (A) / floor substrate is particularly preferable, and in the structure, the foam contains 25% by weight of inorganic powder. It is preferably a plastic foam containing 0.1% or more. In the soundproof floor of the present invention, when the impact sound on the floor is transmitted through the wooden floor material of the soundproof floor, the impact time of the impact sound transmitted to the room below by the multilayer plastic foam becomes longer and the impact sound peak is lowered, and the impact sound is reduced. It is estimated that the frequency of the sound shifts to the low frequency side, making it difficult for the human ear to hear.

[0010]

According to the present invention, it is possible to provide a soundproof structure having appropriate hardness, light weight, and excellent soundproofness even if the thickness is reduced. And, the soundproof floor constructed using this soundproof structure has excellent hardness and soundproofing when standing on the floor, can reduce the thickness of the floor, and has excellent durability such as not causing creep. Have. Therefore,
INDUSTRIAL APPLICABILITY The soundproof structure of the present invention can be widely used not only for soundproof floors but also for various applications requiring soundproofing such as ceiling structures and partition wall structures. Next, the present invention will be described with reference to examples.

[0011]

【Example】

Example 1 A 25% compressive strength obtained by foaming a vinyl acetate copolymer (VA content 10%) on the lower part of a 2.7 mm thick upper wood floor plate (face plate 1) made of a wood-based material is 0.6 kg / cm ^2. And the density is 0.
Plastic foam (A) with a thickness of 2 mm of 08 g / cm ³
[Substrate-1], and a plastic foam (B) having a 25% compressive strength of 1.6 kg / cm ² and a density of 0.16 g / cm ^{3 and} a thickness of 10 mm, which is formed by foaming low-density polyethylene (B). ) [Undercoating material-2] was laminated, and a soundproof floor was constructed so that the floor base was underneath, and each member was bonded with a vinyl adhesive. The soundproofing property, the compression creep and the compression hardness of the thus constructed soundproofing floor were measured as follows.

Soundproofness The soundproofing property was determined by the sound insulation grade value specified in JIS A 1419. The compression creep wood flooring is a rectangular parallelepiped with a side of 50 mm (length, width) and a thickness of 10 to 20 mm, and has a horizontal fixed plate and a movable plate that can always be compressed horizontally with a constant load according to the deformation of the test piece. The thickness of the test piece was measured using an apparatus having a structure capable of easily measuring the change. 168 with initial thickness and 0.2 Kg / cm ² load
The thickness after time was measured. Strain (%) according to the following formula
Was calculated. Strain = 100 × (t ₀ −t ₁ ) / t _{0 In the} formula, t ₀ : initial thickness of test piece (mm) t ₁ : thickness of test piece after 168 hours (mm)

The compression hardness wood floor material is a rectangular parallelepiped having a side length of 50 mm (length, width) and a thickness of 10 to 20 mm, and has two parallel plane plates larger than each piece of the test piece, and one plane plate ( The compression plate can move smoothly in the direction perpendicular to the plane by the motor drive, and the displacement and load can be measured. The maximum load during the test is 15
It was measured with a compression tester of ~ 85%. After measuring the thickness of the central part of the test piece, place the test piece between the parallel flat plates of the tester, compress it by 25% of the initial thickness at a speed of 10 mm / min, and stop for 20 seconds. The latter load was weighed. The compression hardness was calculated by the following formula. Compression hardness (kg / cm2) = P / W × L P: Compressed 25%, load after 20 seconds (kg) W: Width of test piece (cm) L: Length of test piece (cm)

Examples 2 to 5 An upper wooden floorboard was prepared in the same manner as in Example 1 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed. A soundproof floor having a structure of (surface plate 1) / plastic foam (A) / plastic foam (B) / floor substrate was constructed and bonded with a vinyl-based adhesive as in Example 1. The characteristics of the obtained soundproof floor are shown in Table 1 together with the characteristics of the soundproof floor of Example 1. Examples 6 to 10 In the same manner as in Example 1 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed, the upper wooden floor board (surface plate) was changed. A soundproof floor having a structure of 1) / plastic foam (A) / plastic foam (B) / floor substrate was constructed. The characteristics of the obtained soundproof floor are shown in Table 2.

Examples 11 to 15 An upper wooden floorboard was prepared in the same manner as in Example 1 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed. (Surface plate 1) / Plastic foam (A) / Plastic foam (B) / Plastic foam (A) / Floor The soundproof floor having the structure of the base is constructed, and vinyl adhesive is used as in Example 1. Glued
The characteristics of the obtained soundproof floor are shown in Table 3. Examples 16 to 20 In the same manner as in Example 1 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed, the upper wooden floor board (surface plate). 1) / Plastic foam (A) / Plastic foam (B) / Plastic foam (A) / Plastic foam (B) /
A soundproof floor having a structure of 5 to 8 layers of a soundproof structure / floor substrate such as a plastic foam (A) was constructed and bonded with a vinyl adhesive. The characteristics of the obtained soundproof floor are shown in Table-4.

Comparative Examples 1 to 5 An upper wooden floorboard was prepared in the same manner as in Example 1 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed. (Surface plate 1) / Plastic foam (A) / Floor substrate, upper wooden floor plate (Surface plate 1) / Plastic foam (B) / Floor substrate or upper wooden floor plate (Surface plate 1) / Plastic foam (A) / Plastic foam (B) / floor substrate, a soundproof floor having a structure was constructed and bonded with a vinyl adhesive. The characteristics of the obtained soundproof floor are shown in Table-5. Comparative Examples 6 to 10 In the same manner as in Example 11 except that the plastic foam (A) [base material-1] and the plastic foam (B) [base material-2] were changed, the upper wooden floor board (surface plate). 1) / Plastic foam (A) / Plastic foam (B) /
A soundproof floor having a structure of plastic foam (A) / floor substrate was constructed and bonded with a vinyl adhesive. The characteristics of the obtained soundproof floor are shown in Table-6.

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

[0021]

[Table 5]

[0022]

[Table 6]

Claims (5)

[Claims] 1. A plastic foam having (A) 25% compressive strength of 0.9 kg / cm ² or less and density of 0.09 g / cm ³ or less, and (B) 25% compressive strength of 1.5 kg / cm ² or more. And the density is 0.1
~ 0.2g / cm ³ plastic foam (A) / (B)
Alternatively, the soundproof structure is formed by stacking in the order of (A) / (B) / (A). 2. The thickness of foam (A) / foam (B) is 1 /
The soundproof structure according to claim 1, wherein the soundproof structure is 1 to 1/12. 3. The soundproof structure according to claim 1, wherein the soundproof structure has a thickness of 3 to 17 mm. 4. The soundproof structure according to claim 1, wherein the foam (A) and the foam (B) are plastic foams containing 25% by weight or more of inorganic powder. 5. A soundproof floor comprising the soundproof structure according to claim 1 provided between the upper wooden floorboard and the floor base.