JPH0617493A - Heat and sound insulating panel - Google Patents

Abstract

PURPOSE:To exert the excellent heat insulation property and sound insulation property by partitioning the space into multiple spaces with two surface plates and a core material having a honeycomb structure or a corrugate structure, and filling synthetic resin foam grains into the spaces. CONSTITUTION:A heat and sound insulating panel is constituted of a core material having a honeycomb structure or a corrugate structure and two surface plate, and thermoplastic foam grains having an independent foam structure are filled into multiple spaces formed by the surface plates and a frame of the core material. The bulk density of the grains is properly selected in view of the compression strength and heat insulation property according to the intended purpose, or different kinds of foam grains are mixed, or fine voids are formed between adjacent grains into a porous structure, and the required sound absorbing performance is exerted. The grains are stuck together into the water-permeable or air-permeable state as required to form fine holes between the grains.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating and sound insulating panel. More specifically, the present invention relates to a lightweight and thin heat insulating and sound insulating panel used for building materials such as partition walls and doors having excellent heat insulating performance and sound insulating properties.

[0002]

2. Description of the Related Art Conventionally, most of the panels conventionally used for construction have mainly pursued either a heat insulating function or a sound insulating function. The synthetic resin foam with a closed cell structure was the best core material to improve the heat insulation function, but the sound insulation function was insufficient. In order to improve the sound insulation function, porous sound-absorbing material such as glass wool or urethane foam with an open-cell structure is used as the core material, and the thickness is made large to improve the functions of heat insulation and sound absorption. It was

Further, a porous sound absorbing material has a low low frequency sound absorption coefficient, and it is difficult to express its superiority to a hollow panel without a core material, and further, a reduction in transmission loss due to a resonance phenomenon due to a surface plate is observed. Met. There is a method of increasing the areal density from the mass law in order to enhance the sound insulation function, but it is a very heavy panel and inferior in practicality in order to exert a sufficient effect.

[0004]

SUMMARY OF THE INVENTION The present invention provides a heat insulating and sound insulating panel that overcomes the problems of the prior art and is lightweight and thin and has excellent heat insulating performance and sound insulating performance that is practically excellent as a building material. To provide.

[0005]

Means for Solving the Problems The above-mentioned problems are composed of two surface plates and a core material, and the core material has a honeycomb structure or a corrugated structure, and it is preferable that the synthetic resin foamed particles be present in the space of the core material. It is solved by an insulating and sound insulating panel characterized by being filled with. That is, the present invention is a heat-insulating sound-insulating panel comprising two surface plates and a core material, and synthetic resin foam particles are filled in the space of the core material.

The present invention will be described below. In the present invention, the synthetic resin foamed particles to be filled in the space of the core material is a thermoplastic resin and is not particularly limited in its kind, but is usually a polystyrene type, a polyolefin type, or a polyvinylidene chloride type. It is a foamed resin particle having a closed cell structure. The bulk density of the particles is appropriately selected from the viewpoints of compressive strength, heat insulation performance, and economy according to the purpose of use, but from the viewpoint of heat insulation performance, which is the main purpose of the present invention, usually 15 to 100 kg / m ³ is preferable.
Of course, different types of foamed particles, for example, particles having different apparent densities or particles of different materials can be mixed and used from the viewpoint of sound insulation characteristics and heat insulation performance. When more excellent heat insulating performance is required, it is particularly preferable to use expanded resin particles using hydrochlorofluorocarbon and a vinylidene chloride resin containing a fluorocarbon or other fluorocarbon compound as a foaming agent as a base resin.

The particle size of the expanded resin particles is not particularly limited, but particles of 0.3 to 5 mm can usually be used. The expanded particles filled in the space of the core material have a porous structure in which minute voids are formed between adjacent expanded particles, and sound absorption performance is expressed, so that the voids are made fine and numerous. It is also possible to select an appropriate particle size distribution for In addition, due to the resonance phenomenon caused by the foamed particles, the acoustic energy may be converted into vibration energy to enhance the sound absorbing effect. Therefore, the particle diameter is preferably about 0.3 to 2 mm.

The expanded particle group filled in the space in the core material may be in a state where the adjacent expanded particles are only in physical contact with each other, that is, in a state where they are not bonded to each other.
It is preferable that adjacent foamed particles are bonded to each other from the viewpoint of exhibiting structural strength as a panel and improving workability during manufacturing. As the adhesive used for this adhesion,
General-purpose adhesive such as vinyl acetate emulsion, polyvinyl alcohol solution, solvent solution of synthetic resin / rubber, epoxy adhesive, etc. can be used. It is preferable to be in a ready state.

The surface plate used in the present invention may be a commonly used one, such as phenol, melamine, epoxy,
There are decorative plywood such as polyester resin, wood board such as plywood, resin board such as acrylic and vinyl chloride, gypsum board, metal plate such as aluminum and steel plate. The core material of the present invention preferably has a honeycomb structure or a corrugated structure. Specifically, as shown in FIGS. 1A and 1B, the space formed by the surface plate and the frame is partitioned into a plurality of spaces by the core material.

The material of the core material is a resin such as acrylic or vinyl chloride, rubber, aluminum, steel, or paper, and
There are honeycomb plates and corrugated plates made of synthetic resin foam having a closed cell structure. In particular, when the space is partitioned so as to have a plurality of opening areas, sound absorption is exhibited, and it is particularly effective in the low and middle frequency range. Further, the core material having a honeycomb structure is preferable in view of the object of the present invention from the viewpoint that the sound absorbing property is influenced by the opening area thereof, and therefore the selection can be freely made according to the purpose. Further, in order to improve the heat insulation performance, a honeycomb or corrugated core material made of a synthetic resin foam is particularly preferable.

[0011]

EXAMPLES Examples of the heat insulating and sound insulating panel of the present invention will be described in detail below, but the invention is not limited thereto.

[0012]

Example 1 Two aluminum plates (thickness 0.4 mm) were used as the surface plates, and the cell size (distance x in FIG. 1A) was 50 m.
m, the thickness of the core material (distance y in FIG. 1A) is 30 m
A panel made of a paper honeycomb of m as a core material and a frame body around four sides was prototyped. The inside of each cell of the core material is filled with foamed resin particles having an average particle diameter of 1.8 mm and a bulk density of 40 kg / m ³ . The foamed particles have a closed-cell structure in which the base resin is a vinylidene chloride resin, and the gas contains hydrochlorofluorocarbon gas. Since the surface of the expanded beads is pre-coated with an epoxy adhesive and then filled in the cells of the honeycomb core material, the adjacent expanded beads are in a state of being adhered to each other. A perspective view of this panel is shown in FIG.
Table 1 shows the results of evaluation of the heat insulation performance, sound absorption performance, and bending characteristics of this panel by the following evaluations.

[0013]

Comparative Example 1 A panel having the same structure as that of Example 1 except that the space in the core material was not filled with foamed particles, that is, a panel including a surface plate, a paper honeycomb core material, and a frame body around four sides was manufactured. The sound absorption performance, heat insulation performance, and bending characteristics of this panel were evaluated, and the results are shown in Table 1.

[0014]

[Comparative Example 2] The same surface plate as that of Example 1 and a frame body around the four sides, and a bulk density of 24 kg in a hollow portion formed by these
/ M ³ of glass wool material was paneled. The sound absorption performance, heat insulation performance, and bending properties of this panel were evaluated, and the results are shown in Table 1. [Evaluation Method] 1 Sound Absorption Performance The normal incident sound absorption coefficient is measured according to JIS A1405.

Sound absorption coefficient at frequencies of 500 and 200 Hz is 40% or more ∘ 40 to 20% ∘ Δ 20% or less ∘ × Three-level evaluation.

2 Adiabatic performance The thermal conductivity is measured according to JIS A1412. Thermal conductivity at an average temperature of 25 ° C. is 0.035 kcal / mh ° C. or higher ... × 0.035 to 0.028 〃 ・ ・ ・ ○ 0.028 〃 or lower ・ ・ ・ ◎ It is a three-level evaluation.

3 Bending Property A bending test is performed according to JIS A1414. Distance between fulcrums (L) is 1200mm, L / 4 from fulcrum
By 2-line bending test at points. The test piece is a panel without a frame. The amount of deflection when a load of 50 kg is applied is 10 mm or less .... ○ 10 to 15 mm .... △ 15 mm or more.

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

Example 2 A panel having the same structure as in Example 1 was prototyped except that the paper corrugated core shown in FIG. 1B was used as the core material. The cross-sectional dimensions of the core material are the pitch of the peaks and valleys (Fig. 1 (b)
Is 30 mm, the gap (w distance in FIG. 1B) is 10 mm, and the thickness of the core material (y distance in FIG. 1B) is 30 mm.

The sound absorbing performance, heat insulating performance and bending characteristics of this panel were evaluated, and the results are shown in Table 2.

[0022]

[Example 3] Table 2 shows the expanded particles to be filled in the space of the core material.
A panel was manufactured in the same manner as in Example 2 except that the panel shown in FIG. The sound absorption performance, heat insulation performance, and bending property of the panel are evaluated, and the results are shown in Table 2.

[0023]

EFFECTS OF THE INVENTION The panel of the present invention has excellent heat insulation performance because the foamed resin particles having a closed cell structure are filled in close contact with each other in the inner space of the core material. Since the holes are formed and the front and back of the core material are communicated irregularly, it also has excellent sound absorption characteristics. That is, the present invention can provide a high-performance panel suitable for a lightweight and thin structure having both heat insulation and sound insulation.

[Brief description of drawings]

FIG. 1 is a schematic view showing a core material having a honeycomb structure (a) and a corrugated structure (b) of the present invention.

FIG. 2 is a schematic view showing a state in which foamed resin particles are closely contacted and filled in the inner space portion of the core material of the present invention.

[Explanation of symbols]

x cell size (distance between mutually parallel walls of honeycomb) y core material thickness z corrugated plate pitch between peaks and troughs w distance between adjacent corrugated plates

Claims (2)

[Claims] 1. A heat-insulating sound-insulating panel comprising two surface plates and a core material, wherein the space of the core material is filled with synthetic resin foam particles. 2. The heat insulating and sound insulating panel according to claim 1, wherein the core material has a honeycomb structure and a corrugated structure partitioned into a plurality of spaces.