JPS59454A - Sound-proof interior panel - 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] The present invention relates to a soundproof interior material.

In hotels and condominiums, the transmitted sounds of conversations from neighboring rooms and the solid sounds generated when people walk around or children jump in rooms on the upper floors are noise problems that impair livability.

When we consider the causes of such noise, all of them are caused by vibration. In other words, solid sounds from rooms on the upper floor, such as people walking or children, can be pronounced and transmitted as solid sounds. On the other hand, in order to improve the sound insulation performance of walls, it is effective to increase the vibration damping performance of wall materials and reduce vibrations. In addition, G, which is widely used as a construction method for attaching gypsum board to walls as an interior material,
There is the L method, but it has the drawback that vibrations caused by sound pressure excitation vibrate the interior material of the wall, reducing the sound insulation performance.

Conventionally, gypsum boards have been used in large quantities as interior ceiling and wall materials for buildings such as those mentioned above.However, interior materials for buildings are subjected to vibrations of a wide range of frequencies from low to high frequencies. Among these, the low frequency component around 100 H2 becomes a problem, and ordinary gypsum board has little sound insulation and distribution effect and is not effective.

The loss coefficient of such soundproof interior material is 0.051.
The above is desirable.

The present inventors focused on the fact that the vibration caused by the sound pressure excitation causes the wall interior material to vibrate, and after pasting a distribution material on the surface of the gypsum board, as a result of various studies, the drawbacks of gypsum board as a gypsum interior material were solved. The present invention was achieved by discovering that an excellent soundproof interior panel that solves the above problems can be obtained.

According to research conducted by the present inventors, the following materials were found to be optimal as vibration damping materials to be attached to gypsum boards.

That is, the elastic modulus (E') of gypsum board is usually 1.8
2. I Although it is more desirable, it is desirable that it be at least 0.2 or more.

Furthermore, in order to use it as an interior material, it is necessary to have flame retardancy.

The damping material used in the present invention may be any ordinary rubber-based or plastic-based damping material as long as it satisfies the above conditions, but a preferred example is a copolymer of vinyl chloride and vinyl acetate 100. 40 to 80 parts by weight of dioctyl 7 tallate and tricresyl phosphate as plasticizers
iii. There is one in which mica is blended in an amount ranging from 50 to 250 parts by weight, and aluminum hydroxide is further blended in an amount of 50 to 260 parts by weight. As a copolymer of vinyl chloride and vinyl acetate, the ratio of vinyl chloride to vinyl acetate is 70=
80 to 9585 is preferred.

The soundproof interior board of the present invention can be formed by molding the above-mentioned vibration damping material into a sheet shape and attaching it to one side of a gypsum board. It can be determined from both sides of the required flame retardant performance. Normally, gypsum boards are often 9 to 12 ms thick, but in order to satisfy the damping performance at the above damping rate, the thickness of the damping material is preferably 0.5 ms or more.

It is preferable that the gypsum board to which the vibration damping material is attached has a loss coefficient of at least 0.05 or more, particularly 0.1 or more. ・6 The interior board of the present invention has the above-mentioned distribution material on one side of the gypsum board as described above. However, those with paper pasted on the surface of the damping material are particularly preferred for use in the CL method. In other words, in many cases, the distribution materials are made of rubber or plastic, and do not have sufficient adhesion performance with the adhesive used in the GL construction method, which is mainly made of gypsum and is pasted in a dango-like manner on the concrete surface of the building. This adhesive performance can be improved by gluing. As a result of the studies conducted by the present inventors, the adhesive strength between the surface material of the gypsum board and the gypsum board was approximately 1.5'9/cm" in terms of tensile adhesive force. This condition can be met by either adhesive or emulsion adhesive.

Figures 1 and 2 are side views of the interior board of the present invention. Figure 1 shows an example in which no paper is pasted on the interior board, Figure 2 shows an example in which paper is pasted, and 1 shows the interior board made of plaster. board, 2 is a damping material, and 8 is a surface paper.

Next, the present invention will be further explained with reference to Examples and Comparative Examples.

Examples 1-8. Comparative Example 1-2 Five types of damping materials with a thickness of about 0.6 having the composition, elastic modulus (E'), and loss coefficient shown in Table 1 were prepared, and Example 1 was prepared for each.
~8. The distribution materials of Comparative Examples 1 and 2 were used, and each distribution material was pasted onto a 12 mm thick gypsum board to obtain a distribution treated gypsum board as an interior board. Width 21) 1111. A measurement sample with a length of 500 mm was prepared and the loss coefficient was measured. The results are shown in Table 1. The measurement was performed using an automatic vibration analyzer manufactured by Akashi Seisakusho, and was measured using the half width at the resonance point.

Example 4 150 parts by weight of vinyl chloride-vinyl acetate copolymer
parts by weight of mica, 200 parts by weight of aluminum hydroxide 7
By blending 0 parts by weight of dioctyl phthalate, vibration damping materials having six different thicknesses shown in Table 2 were prepared.

Each damping material was pasted onto a 12 mm thick gypsum board to form a damping treated gypsum board. The loss coefficient was measured in the same manner as in Example 1, and the results are also listed in Table 2. The damping material's E' at 20°C is 6 x 108 = 97 cm.
9, tan δ is 0.451 ().

As described above, it is clear that the interior board of the present invention has extremely excellent soundproofing performance that satisfies the interior material by attaching a specific damping material to one side of the gypsum board.

[Brief explanation of the drawing]

1 and 2 are side views of a soundproof interior panel according to an example of the present invention, respectively. 1... Gypsum board 2... Vibration damping material 8... Surface paper. Patent applicant Brideston Tire Co., Ltd. Figure 1

Claims (1)

[Claims] L One side of the gypsum board, Q, has a thickness of 5111 or more, and has an elastic modulus of 2 x 108 9/c at 100 Hz.
A soundproof interior board comprising a flame-retardant damping material having a loss coefficient of 0.2 or more and a loss coefficient of 0.2 or more. λ The soundproof interior board according to claim 1, which uses an allocation material with paper pasted on the surface.