JP2006321964A - Vibration insulator material, and structure of vibration-proof floor using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide such a vibration insulator material for use in a floor support leg as has excellent load resistance and excellent vibration-deadening performance. <P>SOLUTION: The vibration-proof bathroom structure is provided with a disk-shape vibration insulator material (2) arranged on the floor foundation (1) of a bathroom, a support leg (3) which is erected on the vibration insulator material (2) and fixed with a washer (4) at the bottom end, and a sub-floor material (5) which is supported with the support leg (3). Above a floating floor on the sub-floor material (5) is installed a bath room unit on the market. The vibration insulator material (2) comprises 100 parts by weight of polyvinyl chloride, 50-200 parts by weight of a plasticizer and 10-200 parts by weight of a filler having an aspect ratio of 10 or less. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anti-vibration material and an anti-vibration floor structure using the same, and more particularly to an anti-vibration floor structure of a floating floor type bathroom.

  In recent years, large slabs are often used as structural housings in apartment houses. The use of large slabs has advantages such as increasing the degree of freedom in floor plan design and enabling large spaces, but when there is a bathroom on the upper floor and a room on the lower floor, these are particularly within the same span. If there is, the floor impact sound generated in the bathroom on the upper floor may be transmitted as noise to the room on the lower floor. Furthermore, in the case of a free floor plan that does not limit the place around the water, there may be a bathroom directly above the living room. In such a case, the floor impact sound generated in the bathroom may be transmitted directly to the living room as noise. For this reason, there is an increasing demand for a floor support leg for vibration isolation that can effectively prevent floor impact sound generated in the bathroom from being propagated as noise to other places.

Conventionally, as shown in FIG. 2, as a floor support leg structure for vibration isolation, the vibration isolator rubber (42) at the lower end of the floor support leg (41) is shaped like a truncated inverted cone, and the bottom surface is used for shape retention. As shown in FIG. 3, a cylindrical support leg (52) is erected on a rubber anti-vibration base (51), and an auxiliary leg is provided inside the structure. A structure has been proposed in which the lower end of the auxiliary leg (53) comes into contact with the upper surface of the slab (55) when the rubber vibration isolating base (51) is compressed by a load while holding the (53) (patent) Reference 2). However, in the former structure, the load resistance is not sufficient, and when the hot water is stored in the bathtub, the bathroom sinks, and the joint at the entrance / exit is damaged or the piping is damaged. If a hard vibration-proof rubber is used to improve load resistance, a sufficient vibration-proof effect cannot be obtained, and noise cannot be reduced. In the latter structure, there is a problem that the shape is complicated and the manufacturing cost is high, and if the lower end of the auxiliary leg (53) is in contact with the upper surface of the slab (55) due to the load, the sound insulation performance is lowered. In FIG. 2, (46) is a support block, (47) is a floor base, (48) is a floor plywood, and (49) is a slab.
JP 2002-276144 A. JP 2002-227396 A.

  In view of the above problems, an object of the present invention is to provide an anti-vibration floor structure having excellent load resistance and excellent anti-vibration performance, and to provide an anti-vibration material used for the anti-vibration floor structure.

  The vibration-proof material according to the present invention comprises 100 parts by weight of polyvinyl chloride, 50 to 200 parts by weight of a plasticizer, and 10 to 200 parts by weight of a filler having a number average aspect ratio (hereinafter simply referred to as “aspect” ratio) of 10 or less. Is. In addition, the aspect ratio said by this invention extracts 100 fillers at random from an optical micrograph, and takes the average value.

  The anti-vibration floor structure according to the present invention is such that the anti-vibration material having the above-described configuration is disposed on the floor base, the support legs are erected from the anti-vibration material, and the floating floor is supported by the support legs. .

  Regarding the polyvinyl chloride used in the present invention, the production method, degree of polymerization, powder properties, etc. are not particularly limited, but considering long-term stability when a plasticizer is added, JIS K6720-2 appendix 4.1.3. It is preferable that the degree of polymerization measured in conformity (hereinafter simply referred to as “polymerization degree”) is 1000 or more. Crosslinking may or may not be performed.

  The plasticizer used in the present invention is not particularly limited as long as it is a plasticizer capable of plasticizing polyvinyl chloride. Examples of such plasticizers include phthalate esters such as di-2-ethylhexyl phthalate, dibutyl phthalate, diisononyl phthalate, and polyester plasticizers such as propylene glycol adipate and 1,3-butylene glycol adipate. Examples thereof include epoxy plasticizers such as epoxidized soybean oil, trimellitic acid plasticizers such as tri-2-ethylhexyl trimellitic acid, chlorinated paraffin, and stearic acid plasticizers. In consideration of compatibility with polyvinyl chloride, it is preferable to use phthalates, polyester plasticizers, epoxy plasticizers, and trimellitic acid plasticizers.

  As the plasticizer used in the present invention, one kind may be used alone, or two or more kinds of plasticizers may be mixed and used.

  The addition amount of the plasticizer is 50 to 200 parts by weight, preferably 100 to 150 parts by weight with respect to 100 parts by weight of polyvinyl chloride. The reason is that if the addition amount is too small, the vibration-proof material is hard and a sufficient vibration-proof effect cannot be obtained, and if it is too large, the load resistance of the vibration-proof material is significantly reduced.

  Examples of the filler having an aspect ratio of 10 or less used in the present invention include fly ash, silica, silica fume, titanium oxide, carbon black, and blast furnace slag.

  By including a filler having an aspect ratio of 10 or less, the vibration-proof material according to the present invention can improve the load resistance without impairing the vibration-proof property.

  When the aspect ratio of the filler exceeds 10, the load deformation is suppressed and the load resistance is improved, but the vibration isolating material is also suppressed when the vibration isolating material is subjected to an impact load, so the vibration isolating performance is reduced. To do.

  The average particle diameter of the filler having an aspect ratio of 10 or less is not particularly limited, but is preferably 0.1 to 20 μm in consideration of dispersibility with respect to polyvinyl chloride.

  The filler having an aspect ratio of 10 or less used in the present invention may be used alone, or two or more kinds of fillers may be mixed and used.

  The addition amount of the filler having an aspect ratio of 10 or less is 10 to 200 parts by weight with respect to 100 parts by weight of polyvinyl chloride. The reason for this is that if the amount added is too small, it becomes difficult to achieve both load resistance and vibration-proof performance of the vibration-proof material, and if it is too large, the strength of the vibration-proof material is lowered and molding becomes difficult, This is because it becomes difficult to use it for a long time.

  The vibration-proof material of the present invention may contain additives other than a plasticizer and a filler having an aspect ratio of 10 or less for the purpose of improving moldability, stability, designability, and the like. Such additives include heat stabilizers such as tin mercapto compounds, tin maleates, metal soaps, lubricants such as low molecular weight oxidized polyethylene, stearic acid, pentaerythritol stearate, UV light such as benzophenone and triazole. Examples include absorbents, reinforcing agents such as methyl methacrylate-butadiene-styrene copolymer, acrylic rubber, inorganic fillers such as titanium oxide and mica, and colorants such as phthalocyanine pigments and azo pigments.

  The method for molding the vibration-proof material of the present invention is not particularly limited, and may be an extrusion molding method, an injection molding method, a press molding method, or the like. The shape is preferably a sheet.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration-proof floor structure which is excellent in load bearing property and is excellent also in vibration-proof performance can be provided. In particular, the vibration-proof material according to the present invention can be suitably used for a vibration-proof floor structure of a bathroom provided in an apartment house or the like.

  Next, in order to specifically explain the present invention, some examples of the present invention and comparative examples for showing comparison with the examples will be given.

<Example 1>
Polyvinyl chloride (manufactured by Tokuyama Sekisui Co., Ltd., trade name “TS1400K”: degree of polymerization measured according to JIS K6720-2 Appendix 4.1.3 is 1400) 100 parts by weight of heat stabilizer (Sankyo Organic Synthesis) 3 parts by weight (trade name “ONZ-72F”) manufactured by the company was added, and the mixture was stirred at high speed with a mixer (Kawata Supermixer) and heated to 70 ° C. Thereafter, 150 parts by weight of a plasticizer (trade name “DINP” manufactured by Jay Plus Co., Ltd.) was added, and the mixture was again stirred at a high speed with a mixer and heated to 110 ° C. Thereafter, 30 parts by weight of titanium oxide (manufactured by Teika, trade name “JR-600A”: average particle size 0.25 μm, average aspect ratio: 2, maximum aspect ratio: 5), lubricant (made by Mitsui Chemicals, trade name “ "Hiwax 4202E") 3 parts by weight was added, and the mixture was again stirred at high speed with a mixer to obtain a resin composition for vibration-proof material.

  This resin composition was put into an extruder (trade name “SLM50” manufactured by Sekisui Koki Co., Ltd.), and extrusion molding was performed under a barrel temperature condition of 150 ° C. to obtain pellets of a resin composition for vibration-proof materials.

  The pellets are put into an injection molding machine (trade name “IS-350FA2” manufactured by Toshiba Machine Co., Ltd.) and injection molded under the conditions of a barrel temperature of 190 ° C. and an injection pressure of 5 MPa. A vibration material was prepared.

<Example 2>
Except for using 30 parts by weight of silica fume (manufactured by Sakai Kogyo Co., Ltd., trade name “silica fume SF-R”, average particle size: 0.15 μm, average aspect ratio: 1, maximum aspect ratio: 2) instead of titanium oxide. Was prepared in the same manner as in Example 1.

<Example 3>
Example 1 except that 30 parts by weight of fly ash (trade name “Superflow”, trade name “Super Flow”, average particle size: 10 μm, average aspect ratio: 1, maximum aspect ratio: 2) was used instead of titanium oxide, instead of titanium oxide. A vibration-proof material was produced in the same manner.

<Example 4>
A vibration-proof material was produced in the same manner as in Example 1 except that the amount of titanium oxide added was 60 parts by weight.

<Example 5>
A vibration-proof material was produced in the same manner as in Example 1 except that the amount of titanium oxide added was 100 parts by weight.

<Comparative Example 1>
An anti-vibration material was produced in the same manner as in Example 1 except that no titanium oxide was added.

<Comparative Example 2>
A vibration-proof material was produced in the same manner as in Example 1 except that the amount of titanium oxide added was 300 parts by weight.

<Comparative Example 3>
A vibration-proof material was produced in the same manner as in Example 1 except that 30 parts by weight of wollastonite (manufactured by Sakai Kogyo Co., Ltd., trade name “NYYAD-G”, aspect ratio: 15) was added instead of titanium oxide.

<Comparative example 4>
A disk with a diameter of 30 mm was cut out from a commercially available natural rubber sheet (thickness 10 mm, rubber hardness 45) to create a disk-shaped vibration-proof material.

<Anti-vibration structure for bathroom>
As shown in Fig. 1, the anti-vibration structure of the bathroom is a disc-shaped anti-vibration material (2) disposed on the floor base (1) of the bathroom, A support leg (3) having a washer (5) fixed thereto and a floor base material (5) supported by the support leg (3). A commercially available bathroom unit ("FPN-1216" manufactured by Sekisui Chemical Co., Ltd.) is installed on the floating floor on the floor base material (5).

  As the vibration-proof material (2), the disk-shaped vibration-proof material obtained in Examples 1 to 5 and Comparative Examples 1 to 4 was installed.

  As Comparative Example 5, the washer (5) and the floor base (1) were brought into direct contact without using a vibration-proof material.

Performance Evaluation The above vibration-proof structure was installed at the center of the second-floor floor surface (RC slab having a thickness of 150 mm and a floor area of 12 m ² ) of a two-story house. A weight of 500 kg was placed on the bathroom floor assuming an actual use state, and the amount of displacement at the four corners of the bathroom floor was measured using a dial gauge, and the average value of the four points was obtained. In addition, a tapping machine (product name “FI-01”, manufactured by Rion Co., Ltd.) is installed at the center of the bathroom floor to generate floor impact sound by vibrating the floor, and noise installed in the first floor reverberation room (room capacity 50 m ³ ). The downstairs noise was measured with a meter (product name “NA-27”, manufactured by Rion Co., Ltd.) under the conditions of time constant FAST, frequency weighting A characteristic, and measurement time 10 seconds.

  However, the anti-vibration material of Comparative Example 2 contained too much titanium oxide, and the anti-vibration material was destroyed at the time of injection molding, and performance evaluation could not be performed.

The evaluation results are shown in Tables 1-2. As is clear from these evaluation results, the anti-vibration materials of Examples 1 to 5 exhibit excellent anti-vibration performance that reduces downstairs noise by about 8 dB, and at the same time, the load resistance is within about 1 mm. Very good. On the other hand, the anti-vibration material of each comparative example does not achieve both load resistance and anti-vibration performance, such as a displacement amount greatly exceeding 1 mm or a reduction amount of downstairs noise being less than 5 dB. From the above results, the excellent performance of the vibration-proof material according to the present invention could be confirmed.

It is a perspective view which shows an example of the vibration-proof floor structure of this invention. It is a fragmentary sectional view showing an example of the conventional vibration-proof floor support leg structure. It is a fragmentary sectional view which shows the other example of the conventional floor support leg structure for vibration isolation.

Explanation of symbols

(1): Bathroom floor base
(2): Anti-vibration material
(3): Support legs
(4): Washer
(5): Floor base material

Claims (2)

  A vibration-proof material comprising 100 parts by weight of polyvinyl chloride, 50 to 200 parts by weight of a plasticizer, and 10 to 200 parts by weight of a filler having a number average aspect ratio of 10 or less.   An anti-vibration floor structure, wherein the anti-vibration material according to claim 1 is disposed on a floor base, a support leg is erected from the anti-vibration material, and a floating floor is supported by the support leg.

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