JPH10299239A - Cushion material for soundproof floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the degree of permanent set in fatigue and secure a cushion property at the same time and further, improve both soundproof capacity and walking feeling. SOLUTION: An urethane foamed sheet 2A having the expansion ratio of 50-70 multiples is compressed as much as 50% against the original thickness D by a hot press to form a cushion material 2 for a soundproof floor stuck on the whole underface of the floor member 1. In this way, both upper and lower surfaces of the cushion material 2 are hardened by the hot pressing and the permanently set depth (settled depth) can be lessened. And further, a soft foamed layer is left in the inside of the cushion material 2 and hence, the cushioning property can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material for a soundproof floor.

[0002]

2. Description of the Related Art Conventionally, foamed plastic flooring, which is called a cushion floor, is generally installed on the floor of an apartment house or a detached house in order to improve comfort.
Foamed plastic flooring has a lower warmth than wooden flooring and the like, and therefore, those in which a cushioning material such as sponge or mat is adhered to the entire lower surface of the wooden flooring tend to be used.

[0003]

However, in a conventional wooden flooring material in which a cushioning material such as a sponge or a mat is adhered to the entire lower surface, since the entire cushioning material is soft, the amount of floor setting is reduced. (The amount of sinking) becomes large, and on the contrary, the walking feeling becomes worse. The present invention has been made in view of the above conventional example, and is capable of securing cushioning while reducing the amount of settling, thereby improving both soundproofing performance and walking sensation. It is an object to provide a cushion material.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a cushioning material for a soundproof floor which is adhered to the entire lower surface of a flooring material 1 and has a foaming ratio of 50 to 70 times. The foamed sheet 2A is formed by compressing the foamed sheet 2A by about 50% with respect to the original thickness D by a hot-pressing press. With this configuration, both upper and lower surfaces of the cushion material 2 are hardened by the hot-pressing press. Therefore, the amount of settling (the amount of sinking) can be reduced, and a soft foam layer remains in the interior of the cushion material 2, so that the cushioning property can be secured and the walking feeling can be improved, and at the same time, the soundproofing performance can be improved. it can.

Further, it is preferable to form an uneven portion 3 on the surface of the urethane foam sheet 2A on the floor material 1 side. In this case, an air layer 4 formed by the uneven portion 3 is provided between the floor material 1 and the cushion material 2.
Is formed, and both the soundproof performance and the walking feeling can be further improved by the cushioning effect and the soundproofing effect of the air layer 4.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. As shown in FIG. 1A, the soundproof floor A according to the present embodiment includes a floor material 1 and a cushion material 2 attached to the entire lower surface of the floor material 1. The floor material 1 is made of, for example, a veneer veneer plywood having a 9 mm-thick back groove, the cushion material 2 is heated and compressed to about 50% of the original thickness D, and has an embossed shape ( It is composed of the urethane foam sheet 2A provided with the uneven portions 3). Reference numeral 7 in the figure denotes a floor finishing material such as a carpet.

As the urethane foam sheet 2A, one having an expansion ratio of 50 to 70 times is used. As shown in FIGS. 1 (b) and 1 (c), the urethane foam sheet 2A is hot-pressed.
A obtained by compressing A by 50% with respect to the original thickness D and further forming an uneven portion 3 on the surface on the floor material 1 side by embossing is used as the cushion material 2. In the present embodiment, the uneven portion 3
Is formed on the surface of the cushion material 2 after compression with a thickness d ₁ of ₁ mm.

[0008] By using, as the cushion material 2, a urethane foam sheet 2A having a high expansion ratio (50 to 70 times), which is compressed by about 50% with respect to the original thickness D by a hot press, is used. Both upper and lower surfaces are hardened by hot-pressing, respectively, and the amount of sag is reduced, and the inside is left with a soft foam layer as it is, so cushioning can be secured, walking feeling is improved, and at the same time soundproofing Performance can also be improved. Further, the urethane foam sheet 2 is embossed.
Since the uneven portion 3 is formed on the surface of the floor material 1 on the side of the floor material A, an air layer 4 is formed between the floor material 1 and the cushion material 2. The effect that both the walking feeling and the walking feeling can be further improved can be obtained.

[0009]

EXAMPLES As the urethane foam sheet 2A, ten kinds of cushions having a total thickness d of 50% of the original thickness D were obtained from a total of ten types of samples having an expansion ratio of 60 and an original thickness D of 5 mm to 14 mm. Material 2 was produced. That is, for each of the ten types of urethane foam sheets 2A, FIG.
The urethane foam sheet 2A is pressed from both upper and lower surfaces by hot pressing with the embossed upper die 5 and lower die 6 shown in FIG.
The cushion material 2 was compressed at 0 ° C. for 30 seconds to prepare a cushion material 2 having a total thickness d of 5 mm including the uneven portion 3 having a thickness d ₁ of ₁ mm as shown in FIGS. 3B and 3C. A soundproof floor A shown in FIG. 1A was attached to the entire back surface of the flooring 1 with an adhesive.

FIG. 2 shows the relationship between the L value representing the soundproofing performance of the above ten types of cushioning materials 2 and the amount of set off (mm) of the cushioning material 2 when the load is 1 kg / cm ² . The line A in the figure indicates the L value, and the line B indicates the set amount. As is apparent from FIG. 2, the original thickness D is 10
When the cushion material 2 having a size of 11 mm to 11 mm is compressed to a thickness of 50%, the value of L can be cleared to 45 and the amount of sag becomes sufficiently small. I understand. Here, it can be seen that the set amount (line B) in FIG. 2 changes depending on the hardness (density) of the cushion material 2. Regarding the L value (line A), when the original thickness D is 5 mm, the cushion material 2 itself clears the L value = 45 when the original thickness D is 10 mm and 11 mm. ,
It seems that L value = 45 can be cleared by the so-called emboss effect. Also, the original thickness D of the cushioning material 2 is 1
If the thickness is 2 mm or more, it is considered that the cushioning material 2 itself is hardened, thereby deteriorating the soundproofing performance.

As a result, the urethane foam sheet 2A having an expansion ratio of 50 to 70 times, preferably 60 times and an original thickness D of 10 mm to 11 mm is compressed to a thickness of 50% by a hot press to provide a cushion for a soundproof floor. When used as the material 2, the soundproofing floor A having the most excellent soundproofing performance, the amount of sag during walking or jumping, and a good walking feeling can be obtained.

The uneven portion 3 is not necessarily formed on one side of the urethane foam sheet 2A, but may be formed on both sides. In this case, the soundproofing performance and walking feeling are further improved. Can be done. The values of the original thickness D and the total thickness d of the urethane foam sheet 2A are not limited to the above-described embodiment. further,
Although the case of compressing to a thickness of 50% of the original thickness D has been described, it is not always necessary to accurately compress to a thickness of 50%, and in other words, a hard layer is formed on the surface of the urethane foam sheet 2A.
The compression ratio (about 50%) to the extent that a soft foam layer remains inside is also included.

[0013]

As described above, the invention according to claim 1 of the present invention is a cushioning material for a soundproof floor adhered to the entire lower surface of a flooring material, and has a foaming ratio of 50 to 70 times. Urethane foam sheet is pressed about 5% of the original thickness by hot pressing.
Since it is formed by compressing by 0%, both upper and lower surfaces of the cushion material are hardened by hot-pressing, and the amount of settling (sinking amount) can be reduced, and a soft foam layer is formed inside the cushion material. Since it remains as it is, the cushioning property can be ensured, the walking feeling can be improved, and the soundproofing performance can be further improved. As a result, a cushioning material for a soundproof floor that can improve both the soundproofing performance and the walking feeling can be obtained.

According to a second aspect of the present invention, in addition to the effect of the first aspect, the unevenness is formed on the floor material side surface of the urethane foam sheet, so that the unevenness is provided between the floor material and the cushion material. The air layer is formed by the portions, and both the soundproof performance and the walking feeling can be further improved by the cushioning effect and the soundproofing effect by the air layer.

[Brief description of the drawings]

1 shows an example of an embodiment of the present invention, in which (a) is a cross-sectional view of a soundproof floor, (b) is a cross-sectional view of a cushion material before hot-pressing, and (c) is a cushion material after hot-pressing. FIG.

[FIG. 2] L representing the original thickness of the cushioning material and soundproofing performance
It is a graph which shows the relationship between a value and set amount.

FIG. 3A is a schematic view showing an example of a case where the cushion material is compressed by using an embossed hot press.
(B) is a side view of the cushion material provided with the embossed shape, and (c) is a side view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor material 2 Cushion material 2A Urethane foam sheet 3 Unevenness

Claims (2)

[Claims] A cushioning material for a soundproof floor adhered to the entire lower surface of a flooring material, wherein a urethane foam sheet having a foaming ratio of 50 to 70 times is about 50% of an original thickness by a hot press.
A cushioning material for soundproof floors, which is formed by compression. 2. The cushioning material for a soundproof floor according to claim 1, wherein an uneven portion is formed on a surface of the urethane foam sheet on a floor material side.