JPS61176760A - Floor member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floor member, and more particularly to a floor member for preventing floor impact noise.

(Prior Art) Floor impact noise transmitted from the upper floor to the lower floor has become a major social problem in apartment complexes, wooden houses, offices, schools, and the like. This floor impact sound, for example,
In the case of a light excitation force such as that generated when walking upstairs, it is relatively easy to take measures by laying a thick carpet on the floor. For this reason, heavy floor impact noise has become a particularly serious social problem from the viewpoint of preserving the living environment, improving livability, and noise in the neighborhood. Techniques to improve this heavy floor impact sound (hereinafter simply referred to as floor impact sound) include, for example, glass wool,
A floating floor construction method using fibrous materials such as rock wool in the floor structure, a floor construction method using rubber block pipes, and a construction method using thick rubber sheets as pads have been proposed.

However, these techniques have the following major problems, and cannot be used as a general floor impact noise prevention method. Namely, glass wool, on the lock.

It is true that the floating floor construction method by Ru et al. is relatively effective against floor impact noise and is currently widely used.
It also has problems such as fibers becoming weak during use, poor durability due to water absorption and condensation, and corroding surrounding building materials.Furthermore, it takes time to adjust leveling, etc., and the construction period is long (from a cost perspective). Also, the floor construction method that uses rubber blocks has a relatively quick construction period and does not significantly increase costs, but it is difficult to use in the low frequency range, which is a particularly serious problem with floor impact noise. In addition, the method of using a thick rubber sheet as a pad has the advantage of being the easiest to install and the lowest cost among these methods, but the floor vibration caused by excitation is caused by elastic waves. It is effective to some extent in the high frequency range, which is the range of , but like the floor construction method, there is almost no ability to prevent floor impact noise in the low frequency range.

In this way, various methods have been proposed for preventing floor impact noise, but all of them have many problems (as described above).They are effective in all frequencies, especially in the low frequency range, and are easy to implement. There is a need for a floor impact noise prevention member that can shorten the construction period.

(Problems to be Solved by the Invention) The present invention eliminates the drawbacks of the various floor impact noise countermeasure methods described above, reduces floor impact noise over a wide frequency range from low frequency to high frequency, and improves workability. To provide a floor member for use in a floor impact noise countermeasure construction method, which is excellent in quality, hard to deteriorate over time, and excellent in water resistance and durability.

(Means for Solving the Problems) That is, the gist of the present invention is that the density obtained by solidifying pulverized vulcanized rubber with a particle size of 11.5 to 5.0 with a binder is l.
], 4 to α811/♂, and a thickness of 5 to 100 cm, a reinforcing sheet is laminated on both or one side of the elastic sheet.

The present invention will be further explained below.

For the floor member according to the present invention, pulverized vulcanized rubber having a particle size of 0.5 to 5.0 square centimeters, preferably 1 to 3 square centimetres, is used.

Below α5, the spring constant of the elastic sheet obtained by solidifying with the binder increases and the effect of reducing floor impact noise in the low frequency range decreases, and above 5.0 W, the strength of the elastic sheet after solidifying the binder is insufficient. This is not preferable because it becomes unsuitable for practical use. Moreover, the particle size distribution of the vulcanized rubber pulverized product used here is not particularly limited, as long as the density of the elastic sheet after solidification of the binder can be adjusted within the range of 0.4 to 0.8.

In addition, the density tends to be generally low or the spring constant is low, which tends to be excellent in preventing floor impact noise, but in the case of a structure like the present invention, if the density is lower than f CL 41/lx, The empty!lt ratio in the elastic sheet is high, resulting in poor durability, and there are also fewer adhesion points between particles, resulting in poor strength of the elastic sheet, making it more likely to break during construction.On the other hand, when the density is set to αa t7- or more In this case, the spring constant of the elastic sheet becomes high, and the floor impact sound prevention performance is only comparable to that of conventionally used rubber pads, which is undesirable.Furthermore, the type of pulverized vulcanized rubber is Any of natural rubber, 8BRs isoprene rubber, butyl rubber, acrylic rubber, epichlorohydrin rubber, etc.
There are no particular limitations, and a mixture of these may also be used. As for the rubber used in the present invention, unvulcanized rubber tends to flow easily, and vulcanized rubber is preferable in terms of physical properties such as strain, economical efficiency, and anti-vibration effects.

The binder for adhering the crushed rubber particles is not particularly limited, and polyurethane-based, epoxy-based curing adhesives, rubber-based adhesives, resin-based adhesives, etc. may all be used, as long as they have good shape retention, water resistance, and Any material may be used as long as it can maintain properties such as compression resistance and chemical stability. The amount to be used is appropriately determined based on the specific gravity of the elastic sheet to be obtained, the particle size of the pulverized vulcanized rubber used, etc.

In addition, the thickness of the elastic sheet obtained by solidifying the vulcanized rubber pulverized product with a binder is 5 to 100 mm, preferably 10 to 3 mm.
Used in the range 0-. If the thickness is less than 5 -, there will be almost no effect of reducing floor impact noise, and if the thickness is 100 - or more, the spring constant will be too low and deformation will be too large during loading or vibration. It becomes unusable as a floor material. Moreover, the cost is high compared to the performance, which is not preferable.

The reinforcing sheet used on one or both sides of the elastic sheet is preferably a woven or nonwoven fabric having a basis weight of 30 to 1001/-. This woven or non-woven reinforcing sheet functions as a reinforcing material to improve the workability of the elastic sheet made of crushed rubber, and also has the ability to apply adhesive to plywood, concrete, etc. during construction. It also has the function of improving If the fabric weight of the woven or non-woven fabric is less than 3017 nt, its function as a reinforcing material will be weakened, and conversely, if the fabric weight is 1017 nt or more, it will not work as an adhesive when bonding to plywood, concrete, etc. This is not preferable because the coating properties of the agent are poor and the workability is poor.

In addition to the woven fabric and non-woven fabric, a glass sheet or the like may be used. In this case, from the viewpoint of strength, workability, and anti-vibration properties, a material having a thickness of about 0.1 to 5 mm is preferably used.

Although the manufacturing method of the final component is not limited in any way,
For example, mix the vulcanized rubber powder and binder with a mixer such as a Henschel blender or Ripon blender.
The resulting mixture of pulverized vulcanized rubber and binder is placed in a mold (1) and pressed to form an elastic sheet. During the pressing process, a reinforcing sheet such as a woven fabric or a non-woven fabric may be laminated and bonded to the elastic sheet obtained by applying the method of the present invention by adhesive or the like in a separate process. Alternatively, a molded product made of a pulverized vulcanized rubber product and a binder may be molded into a block shape, sliced into a predetermined thickness, and molded into an elastic sheet. In this case, the reinforcing sheets are laminated, which is an essential requirement of the present invention, by using an adhesive or the like after slicing them to a predetermined thickness.

(Effects of the Invention) The floor member according to the present invention thus obtained can also be used for concrete floor structures and wooden floor structures, and can be used for conventionally used glass wool, rock wool, rubber blocks, etc. Compared to floor impact sound prevention floor materials such as rubber pads, the construction period is shorter, and it has excellent workability, durability, and water resistance, and is wide-ranging not only in high frequency ranges but also in low frequency ranges, which were previously considered difficult. It is possible to significantly reduce the floor impact sound level over a frequency range.

(Example) The present invention will be described in more detail with reference to Examples below. Note that parts in Examples and Comparative Examples are based on weight unless otherwise specified.

Example 1 Urethane resin (manufactured by Sumitomo Bayer Urethane, 100 parts of Dysmohen 1625 and 20.30 parts of Sumidur 44V) was mixed as a binder to 100 parts of a pulverized vulcanized rubber with a particle size of 1 to 3 yen obtained by pulverizing a waste tire. things) 10
The mixture was stirred for 3 minutes using a Henschel blender, and the resulting mixture was immediately poured into a mold (1n@x2 purchased) lined with non-woven fabric with a basis weight of 401/- in advance, and heated to 130C.
The binder was cured by heat pressing for 5 minutes to obtain a floor member according to the present invention having a density of 0.617a'' and a thickness of 10cm.

The obtained flooring material according to the present invention was laid on the 140-kaku concrete slab that borders the upper and lower floors as shown in Fig. It was constructed on the floor structure.

Furthermore, the workability of the elastic sheet was very good, as it was lightweight and could be simply laid flat, with no need for leveling adjustment.

Regarding the floor structure obtained in this way, J Engineering 5A141B
The weight floor impact sound level was measured as specified in .

Comparative Example 1 A similar experiment was conducted on a joist floor, which is a typical conventional construction method, as shown in FIG. A heavy floor obtained downstairs with respect to Example 1 and Comparative Example 1, using the same members as those used in Example 1 except that the present floor member used in Example 1 was replaced with a 45-square joist. Figure 3 shows the measurement results of the impact sound level. As can be seen from Fig. 3, the floor structure using the floor member according to the present invention is 10 to 2 times smaller than the conventional joist floor.
The floor impact sound level is significantly reduced by 0 dB, especially in the low frequency range, by around 20 bB.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of the floor structure in which the floor impact sound level was measured in Example 1, FIG. 2 is a partial sectional view of the floor structure in Comparative Example 1, and FIG. 5 is a partial sectional view of the floor structure in Comparative Example 1. FIG. 3 is a diagram showing the measurement results of the floor impact sound level performed in Example 1. Patent applicant: Nippon Zeon Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] 1. Density 0.4-0.8 g/cm obtained by adding a binder to a pulverized vulcanized rubber with a particle size of 0.5-5 mm and solidifying it.
^3. A floor member characterized in that it is formed by laminating a reinforcing sheet on at least one side of an elastic sheet having a thickness of 5 to 100 mm.