JPS63239497A - Sound isolating composite - 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 sound insulation composite suitable for partitions, doors, etc.

Conventional technology Panels are made by laminating plywood or plastic plates on both sides of a core material such as a paper, plastic or metal honeycomb core, and are lightweight and can be cut into appropriate sizes depending on the location of use. The material is widely used for door installation due to its availability and low cost.

It has been used as a structural material for partitions, etc.

However, panels with core materials such as honeycomb cores have low sound insulation performance, and it is necessary to improve them.
Sound transmission in a high frequency region around kHz is an arrow, and there is a strong demand for improvement of the sound insulation deficiency in this frequency region in this sound transmission loss curve.

Problems to be Solved by the Invention The inventor used a honeycomb core or the like as a core material, and while maintaining its excellent lightness and flexibility in size, it also improved its sound insulation properties and improved the lack of sound insulation. After conducting various studies on the structure of the laminate, the present invention was completed.

Means for Solving the Problems The sound insulation composite according to the present invention has a high-density glass wool board with a density of 60 kg/n+' or more and a thickness of 9 mm or more.
Ml of soft polymer sheets with areal densities of 1 and 5 kg/m2 or more, respectively! ii) and dispersion and lamination, with the total laminated area being 25 to 75% of the surface area of the glass wool board,
A thickness l on the flexible polymer sheet. It is characterized by laminating in this order plywood with a thickness of 501111 or more, a honeycomb core or a similar structural core material, and plywood with a thickness of 1.5Il1m or more.

One embodiment of the present invention will be explained based on the drawings. Fig. 1 shows a cross-sectional view perpendicular to the board surface of the present sound insulation composite, with a density of 6
On both sides of a high-density glass wool plate (1) with a density of 0 kg/m3 or more and a thickness of 9 mm or more, a soft polymer sheet with an areal density of 1,5 kg#w2 or more (2) (vinyl chloride resin filled with iron oxide powder) Polymer sheets) are laminated. On the outside of the above-mentioned soft polymer sheet (2), plywood (3) with a thickness of 1.5 mm or more, honeycomb core or similar structural core material (
4) and plywood (5) with a thickness of 1.5 mm or more are adhesively laminated using adhesives suitable for each to form a composite board.

The density of the high-density glass wool board (1) is 60 kg.
/1113 or more, and if it is less than this, the sound insulation effect, which is the object of the present invention, will be poor, the thickness will become unnecessarily thick, and the rigidity will also decrease, which is not preferable.

The thickness of the high-density glass wool is preferably about 9 to 10 mm for handling purposes. Of course, a sound absorbing board such as rock wool with similar performance may be used instead of glass wool.

The soft polymer sheet (2) is made of, for example, vinyl chloride compound, inorganic heavy powder, lead powder, iron powder, or iron oxide powder.

It is made by kneading barium sulfate powder etc. and forming it into a sheet.
It is a material with excellent handling properties and sound insulation properties, and the resin material is not limited to vinyl chloride.

In the present invention, the soft polymer sheet (2) has an areal density of 1
．． A thickness of 53/m2 or more is used, and a thickness of about 11 is preferable for handling. If the area density is less than the above, the sound insulation properties will be poor, and in order to obtain the same sound insulation effect, the thickness will be thicker, resulting in poor handling. Furthermore, the combined areal density ratio of the laminated portion of the soft polymer sheet and the non-laminated portion of the composite plate must be 1.2 or more, as will be described later. Furthermore, the flexible polymer sheets can be laminated in various ways, such as by distributing a plurality of rectangular plates at appropriate intervals, or by stretching them as a band-like plate between the edges of glass wool plates. In this case, the total laminated area of the soft polymer sheets is 25% of the surface area of the high-density glass wool board.
% or more and 75% or less, and outside this range, the effect of improving sound insulation defects in the low frequency range and high frequency range in the frequency-sound transmission loss curve will be poor, as will be explained in the section on effects below.

Plywood (3) and plywood (5) must have a thickness of 1.5 IIm or more; if the thickness is less than 1.51 mm, the formed panel will have poor mechanical strength such as impact resistance. It is.

Note that instead of plywood, a hard synthetic resin board with excellent impact resistance, such as a synthetic resin board made from a polymer obtained by graft polymerizing vinyl chloride to an ethylene-vinyl acetate copolymer, can also be used.

In addition, the honeycomb core (4) is made of kraft paper and has specifications for general construction materials, and has a thickness of 25 mm.
It is preferable for handling. Instead of a honeycomb core, there are other materials similar to the honeycomb core, such as those with similar structure and performance, such as those with a shape in which corrugated boards are laminated continuously in the direction perpendicular to the board surface, and structural materials with a continuous cylindrical aggregate instead of a hexagonal honeycomb. Structural core materials may also be used.

Function: In the composite board of the present invention having the above-mentioned configuration, (a) high-density glass wool is at the center, and soft polymer sheets, plywood, etc. are arranged on both sides, thereby forming a double wall that is effective for soundproofing. has been done. (b) High-density glass wool, which is excellent as a sound absorbing material, is inserted in the middle. (C) Solid-state sound propagation is suppressed by high-density glass wool and a soft polymer sheet. Furthermore, as (d), the applicant filed a patent application No. 58-1151.
As disclosed in No. 92 "Sound Insulating Structure", the flexible polymer sheets are arranged so that the panel board is composed of regions with different natural frequencies and each region exhibits a different acoustic behavior than the others, and the areal density is Since the area with large area is 25 to 75% of the whole, and the area density ratio is different from other areas by 1°2 or more, the sound transmission energy is reduced to a level corresponding to the area of each part, and sound insulation defects are dispersed. , leveling is achieved.

In this way, an acoustic reinforcing effect is achieved, and the synergistic effect of the soft polymer sheet and the sound-absorbing material provides excellent soundproofing properties without significantly impairing the lightness and size flexibility of the honeycomb core.

Examples Below, examples of the sound insulation effect of the sound insulation composite according to the present invention are shown.
This will be explained in detail using a comparative example.

Example density: 96 kg/n+3. Thickness: 12cm x 180cm
Both sides of high-density glass wool with a size of 90en+ are coated with an areal density of 3.5 kg/m2. Thickness 1■ 30cwX 3
A 0 cm soft polymer sheet (manufactured by Zeon Kasei Co., Ltd., Sandum S-10) was laminated in a houndstooth pattern between both lateral edges of the glass wool plate with an interval of 30 cm, and further on top of that was a 180 cn+X 90c11 sheet. Thickness 21III1
A sound insulation composite was produced by adhering and laminating plywood No. 1, a honeycomb core material made of kraft paper of the same size for building materials with a thickness of 25 rtim, and plywood with a thickness of 2 mva in this order.

In addition, the soft polymer sheet laminated portion has a surface area of 5% of the composite surface area.
0%, the calculated total areal density of the soft polymer sheet and metal plate in the laminated part is 4.6 k3/m2, and the areal density in the non-laminated part is 1.1 kg/m2, and! The surface density ratio between the IN surface and the non-In layer surface was 4.2.

Comparative Example l As shown in FIG. 2 (A), the soft polymer sheet and plywood used in the example were placed on both sides of a honeycomb core core material of the same size and thickness of 50 mm as in Example 1. A panel was formed by laminating the entire surface of the honeycomb core.

Comparative Example 2 As shown in Figure 2 (B), 2nu++ thick plywood (
A composite panel was prepared in which two panels obtained by laminating 5) were arranged with an air layer of 12 mm+ in thickness in between.

Sound transmission loss was measured for each of the above panels in accordance with JIS A 1416 r "Method for Measuring Sound Transmission Loss in a Reverberation Room." The results are shown in curve A (example), curve B (comparison f9+11), and curve C (comparative example 2) in FIG. From FIG. 3, the sound insulation composite according to the present invention shows an excellent sound insulation effect, especially a significant sound insulation deficiency improvement effect, while using a honeycomb core.

Effects of the Invention According to the present invention, it is possible to retain the advantages of using a honeycomb core or a similar structural core material, and to greatly improve the soundproofing properties despite its disadvantages, and to provide an indoor partition panel,
It is extremely useful as a component for doors, concrete wall interior materials, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the sound insulation composite according to the present invention, FIGS. 2(A) and 2(B) are sectional views of each panel of Comparative Example 1 and Comparative Example 2, and FIG. 3 is a sectional view of the sound insulation composite according to the present invention. It is a drawing which shows the relationship between the center frequency and sound transmission loss of each panel of a comparative example. (1)...High-density glass wool, (2)...Soft polymer sheet, (3), (5)...Plywood, (4)...
・Honeycomb core, (6)...air layer.

Claims (1)

[Claims] 1.A surface density of 1.5 kg is applied to both sides of a high-density glass wool board with a density of 60 kg/m^3 or more and a thickness of 9 mm or more.
/ m^2 or more of soft polymer sheets are dispersed and laminated at a distance from each other, the total area of the lamination is 25 to 75% of the surface area of the glass wool board, and a thickness of 1.5 mm is placed on the soft polymer sheets.
A sound insulation composite made by laminating plywood with a thickness of 1.5 mm or more, a honeycomb core or similar structural core material, and plywood with a thickness of 1.5 mm or more in this order.