JPS63239496A - Sound isolating laminate - 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 insulating laminate suitable for partitions, doors, etc.

Conventional technology Panels made by laminating plywood or plastic plates on both sides of a core material such as a paper, plastic or metal honeycomb core are lightweight and can be cut to the appropriate size depending on the location of use. Because it can be used as a frame material and is low cost, it has been widely used as a structural material for doors, 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 is large in the high frequency range around kHz, and there is a strong demand for improvement of the number sound insulation deficit in the frequency range in this sound transmission loss curve.

Problems to be Solved by the Invention The inventor used a honeycomb core or the like as the 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 to solve problems The sound insulation laminate according to the present invention has a density of 60 k8/m3 or more.

A honeycomb core or similar structural core material with a thickness of 15 m or more is placed on both sides of a high-density glass wool board with a thickness of 9 mm or more, and asphalt or mortar is applied from the core opening of the core material. , or l chosen from plaster
The filling area of the partially weighted material is 25 to 7 of the surface area.
Core material filled to account for 5%, density 1,5K
Soft polymer sheet of g/m2 or more and thickness 1.51
It is characterized by having 1111 or more pieces of plywood laminated in this order.

One embodiment of the present invention will be described based on the drawings. FIG. 1 shows a cross-sectional view perpendicular to the board surface of the present sound insulation laminate, with a density of 9.
A hexagonal cylindrical honeycomb core core material (2) made of kraft paper with a thickness of 25m5+ was laminated with an appropriate adhesive on both sides of a high-density glass wool board (1) with a weight of 6 kg/m3 and a thickness of 12+ stories. The upper part of the opening surface of the honeycomb core is filled with plaster as a partial weighting material (3), which hardens to cover the surface of the honeycomb core.

Further, a soft polymer sheet (4) is adhesively laminated thereon using an appropriate adhesive, and a plywood (5) is adhesively laminated on the surface.

As high-density glass wool, the density is 60 kg/m3
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 9 to B degrees for handling purposes. Of course, a sound absorbing board such as rock wool with similar performance may be used instead of glass wool.

In addition, honeycomb cores (which are laminated on both sides of glass wool)
As for 2), a kraft paper with specifications for general building materials is used, and a thickness of about 25III is preferable for handling. Similar structure instead of honeycomb core,
For example, it is possible to use a structural core material similar to a honeycomb core, such as one in which corrugated boards are laminated continuously in the direction perpendicular to the board surface, or a structural material in which a continuous cylindrical aggregate is used instead of a hexagonal honeycomb. can. As the partial filler (3) to be filled from the opening surface of each honeycomb core, in addition to the above-mentioned plaster, asphalt and concrete mortar can also be used. In this method of filling the partially molded material, a continuous area on the core surface may be filled, or it may be filled in a scattered manner in blocks.

In this case, it is necessary that the single or total filling area is in the range of 25 to 75% of the total surface area of the core material. If the filling area is outside this range, the sound insulation loss caused by the disproportionality of the surface density, which will be described later, will be leveled out.

The decentralization effect will be poor. In addition, the filling with the partially weighted material is the total surface density of the soft polymer sheet and plywood that are MtNed on the surface of the core material, and the area filled with the partially weighted material is 1% of the area that is not filled with the material. .It must be at least twice as large. This is because if this areal density ratio is less than 1.2, the desired effect of improving sound insulation defects cannot be obtained.

Next, the soft polymer sheet (4) laminated on the core material is made of, for example, a soft blended vinyl chloride compound, inorganic heavy powder, etc.
Easy to handle as it is made by kneading lead powder, iron powder, iron oxide powder, barium sulfate powder, etc. and forming it into a sheet.

It is a material with excellent sound insulation properties, and in the present invention, a material with an areal density of 1.5 kg/m2 or more and a thickness of l
It is preferable for handling to be close. If the areal density is less than the above, the sound insulation properties will be poor, and the thickness will be too thick to obtain the same sound insulation effect, which is not preferable because the handleability will be poor.

On the soft polymer sheets are plywood (5) and (5), respectively.
are laminated with adhesive. The thickness of the plywood (5) must be 1.5 mm or more; if the thickness is less than 1.5 mm, the formed panel will have poor mechanical strength such as impact strength.

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

Function: In the present invention, (a) soft polymer sheets are arranged on both sides of the high-density glass wool at appropriate intervals, thereby forming a double wall that is effective for soundproofing. (b) High-density glass wool is inserted as a sound absorbing material in the middle. (C) Solid sound propagation is suppressed by elastic glass wool and soft polymer sheet. Furthermore, as (d), the applicant has filed Japanese Patent Application No. 58-115192 "Sound Insulating Structure"
As disclosed in 2007, a panel board is composed of multiple regions with different natural frequencies, and the areal density of the board material is varied so that each region exhibits different acoustic behavior from the others, and furthermore, it is possible to reduce the amount of transmitted sound due to sound insulation defects. In order to suppress the sound insulation loss level, the sound insulation loss frequencies of each part of the area are separated appropriately, and the transmitted energy is also reduced to a level corresponding to the area of each part, thereby achieving the dispersion and leveling of the sound insulation loss.

In this way, an acoustic reinforcement effect is achieved, and the synergistic effect of the soft polymer sheet and the sound absorbing material increases the light weight of the honeycomb core.
This provides excellent soundproofing properties without significantly impairing flexibility and size flexibility.

EXAMPLES Below, the soundproofing effect of the laminate of the present invention will be specifically explained using examples and comparative examples.

Example 1 One side of a rectangular honeycomb core made of kraft paper for general construction materials measuring 8 m x 0.9 m has an areal density of 3.5 k3/l1.
2. Soft polymer sheet with a thickness of 1 mm (Zeon Kasei Co., Ltd.)
Sandam S-10) is laminated on top of the
2 kg of gypsum plaster was dripped onto the sample surface (1.8 m x 0.9 m) as a partial weighting material from each core surface (opening 11). The filling area was set to be 50% of the core surface area. This has a density of 96 kg/m3. A sound insulation structure was produced by adhesively laminating both sides of high-density glass wool of 12 thicknesses.

As a result of calculation, the total areal density of the soft polymer sheet and plywood in the part filled with the partially weighted material is 7.
, 1 kg/m2, which was 1.5 times as much as 4,6 kg/m2 in the part not filled with the partial weighting material.

Comparative Example 1 As shown in Fig. 2 (A), a panel was formed by laminating the same soft sound insulating sheet and the same plywood used in the example on both sides of a honeycomb core made of the same material as in Example 1 and having a thickness of 501 WI11. did.

Comparative Example 2 As shown in FIG. 2(B), the density was 96 kg/3. A 25 mm honeycomb core made of kraft paper for general building materials was laminated on both sides of a high-density glass wool having a thickness of I2n+m, and a 2 mm thick plywood was adhesively laminated on the upper surface of each core to produce a sound insulation structure.

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 (Comparative example 1), and curve C (Comparative example 2) in FIG. As can be seen from the results, the sound insulation laminate according to the present invention exhibits an excellent sound insulation effect, particularly an effect of significantly improving sound insulation defects, even though the honeycomb core is used.

Effects of the Invention According to the present invention, it is possible to retain the advantages of using a honeycomb core or similar structural core material, and to greatly improve the soundproofing performance, which was a disadvantage thereof. 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 structure 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 structure 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)...Honeycomb core. (3)...partially weighted material, (4)...soft polymer sheet. (5)...Plywood.

Claims (1)

[Claims] 1. A honeycomb core or similar structural core material with a thickness of 15 mm or more is placed on 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, and the core material is Asphalt, mortar,
or 1 partially weighted material selected from plaster,
A core material filled so that its filling area occupies 25 to 75% of the surface area, a soft polymer sheet with a density of 1.5 kg/m^2 or more, and plywood with a thickness of 1.5 mm or more are laminated in this order. A sound insulating laminate that is characterized by its ability to