JP2566446Y2 - Thermal insulation panel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel suitable for forming a chamber used in a high-temperature state, such as a prefabricated test chamber, a prefabricated drying chamber, or a prefabricated hot chamber of an environmental test chamber. Things.

[0002]

2. Description of the Related Art Conventionally, as this kind of heat insulating panel, an integral sandwich panel provided with a heat insulating layer made of an injected and foamed urethane resin foam is provided between a pair of opposed metal surface plates. Widely known. In particular, as a high-temperature insulation panel, a panel in which glass wool, rock wool, or the like is filled between a pair of metal surface plates has been known.

[0003]

However, in the former conventional heat insulating panel having a heat insulating layer made of a urethane resin foam, the foam is deteriorated when heated to a high temperature due to the characteristics of the urethane resin foam. As a result, the dimensional stability is deteriorated, and the urethane resin foam and the surface plate are so-called plane-bonded, and the bonding strength is originally too strong, for example, there is a void (void-like defect) on the bonding surface. For this reason, when heated to a high temperature of 100 ° C. or more, for example, there is a problem that embrittlement starts in the urethane resin foam portion bonded to the surface plate and eventually peels off from the surface plate.

[0004] In the latter conventional heat-insulating panel filled with glass wool or rock wool, there is a problem that the filler itself has no strength and cannot be used as an integral heat-insulating panel.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a heat insulating air layer using a honeycomb material between a metal surface plate and a heat insulating layer made of a resin foam. Air insulation and resin foam insulation;
An object of the present invention is to provide an integral heat insulating panel that can reliably use heat even at a high temperature of 100 to 150 ° C. by reliably intercepting heat from a high-temperature chamber by combining two heat insulating functions.

[0006]

According to the present invention, in order to achieve the above object, a honeycomb material is provided on the inside of a first surface plate of a pair of metal surface plates arranged opposite to each other. A heat insulating layer formed of a resin foam which is joined with a face plate at a required interval and is injected and foamed between the honeycomb material and the second surface plate so that a heat insulating air layer is left inside the honeycomb material; The gist is a heat insulating panel provided with.

[0007] The surface plate is made of a metal plate such as a stainless steel plate, an aluminum plate (including an aluminum alloy plate) or a synthetic resin-coated steel plate.

[0008] The honeycomb material is made of, for example, aluminum foil or heat-treated paper. The honeycomb material is provided on the inside of the first surface plate with an appropriate adhesive such as an epoxy adhesive. And are firmly joined.

The heat insulating layer is formed by injecting a foaming resin such as a foaming polyurethane resin or a foaming phenol resin between the honeycomb material and the second surface plate so that a heat insulating air layer is left inside the honeycomb material. It is formed by firing.

[0010] By injection foaming, a part of the resin foam enters the cells of the honeycomb material and is entangled with the honeycomb material, so that the adhesive does not peel off and the strength is sufficiently large. In addition, the heat insulation layer made of resin foam,
It is firmly bonded to the honeycomb material and the second surface plate by so-called self-adhesion. The joint surface of the heat insulating layer on the second surface plate side is disposed outside the high-temperature storage, that is, on the low-temperature side.

[0011] The honeycomb material has a cell size such that the foamed resin component that has entered the cells of the honeycomb material does not reach the inner surface on the second face plate side during the injection and foaming of the foamable synthetic resin. Is about 10 to 20 mm, and the thickness of the honeycomb material is 2 to 4 times the cell size, and 1 mm of the panel thickness.
/ 2 or less.

If the thickness and the cell size of the honeycomb material are each 20 mm or less, the convection phenomenon of air does not occur in the heat insulating air layer formed inside the honeycomb material, and the honeycomb material exhibits excellent heat insulating properties. .

[0013]

According to the heat insulating panel, the honeycomb material is joined to the inside of the first surface plate to form a heat insulating air layer inside the honeycomb material, and injected between the honeycomb material and the second surface plate. A heat insulating layer made of a foamed resin foam is provided, and when assembling a high-temperature chamber with this heat insulating panel,
The honeycomb material side is the high temperature side, that is, the inside of the refrigerator. Thereby, even when the inside of the high-temperature chamber is at a high temperature of, for example, 100 to 150 ° C., the air-insulating layer of the honeycomb material and the heat insulation by the resin foam are combined to use the two heat-insulating functions to combine the heat from the high-temperature chamber. Heat can be reliably shut off, for example, the temperature at the interface between the heat insulating layer made of foamed polyurethane and the honeycomb material can be reduced to 100 ° C. or less, and the heat insulating layer made of urethane resin foam has stable performance. Can be maintained, and the thermal insulation layer is deteriorated by heat (brittleness)
And the peeling phenomenon between the surface plate and the heat insulating layer made of the resin foam can be prevented beforehand.

[0014]

Next, an embodiment of the present invention will be described with reference to the drawings.

In the drawing, a heat insulating panel (3) includes a honeycomb material (5) inside a first surface plate (1) of a pair of stainless steel surface plates (1) and (2) arranged opposite to each other. Is the second surface plate
(2) is joined with an adhesive at a required interval,
A frame (4) is arranged between the peripheral edges of both face plates (1) and (2).

A foamable polyurethane resin material is injected and foamed into a space formed between the first and second front plates (1) and (2) and the frame (4) at the periphery thereof. A heat insulating layer (7) made of a resin foam is provided between the honeycomb material (5) and the second face plate (2), and the honeycomb material (5)
The air layer for heat insulation (6) is left inside.

As the frame (4), a molded article made of heat-resistant resin such as polycarbonate, polypropylene containing calcium carbonate, heat-resistant polyvinyl chloride, fluorine resin, polyamide, polysulfone, polyethersulfone, etc. is used.

[Specific Test] First and second surface plates (1) and (2) made of a stainless steel plate having a thickness of 1.0 mm are arranged to face each other, and the inner surface of one of the first surface plates (1). And a cell size of about 10 mm and a thickness of about 2
A 0 mm honeycomb material (5) was adhered with an epoxy-based adhesive, and a heat-resistant polyvinyl chloride frame (4) was placed inside the periphery of both surface plates (1) and (2) (see FIG. 2). . Then, a polyurethane resin was injected and foamed between the honeycomb material (5) and the other second surface plate (2) to form a heat insulating layer (7) having a thickness of about 80 mm, thereby obtaining a heat insulating panel (3). (See FIG. 1). Thermal insulation panel
(3) The total thickness was about 100 mm.

Then, a high temperature chamber was assembled using the heat insulating panel (3), and at this time, the honeycomb material (5) side was set to the high temperature side, that is, the inside of the chamber. When the high-temperature chamber was kept at 130 ° C., the heat from the high-temperature chamber was cut off due to the presence of the heat insulating air layer (6) of the honeycomb material (5), and the heat insulating layer (7) made of foamed polyurethane and the honeycomb material ( The temperature at the interface with 5) becomes 95 ° C., and the heat insulating layer (7) made of the resin foam is
Stable performance was maintained, and deterioration (brittleness) of the heat insulating layer (7) due to heat was prevented. The temperature on the outer surface of the second surface plate (2), that is, the temperature on the outside of the high-temperature storage was 20 ° C.

[0020]

As described above, the heat insulating panel according to the present invention has a honeycomb material between the inside of the first surface plate and the second surface plate among the pair of metal surface plates arranged in an opposed manner. A heat insulating layer made of a resin foam injected and foamed so as to leave an air layer for heat insulation inside the honeycomb material is provided between the honeycomb material and the second surface plate at a required interval. In assembling a high-temperature chamber with the heat insulating panel of the present invention, if the honeycomb material side is the high temperature side, that is, the inside of the chamber, even if the high temperature chamber is at a high temperature of, for example, 100 to 150 ° C., it is formed using the honeycomb material. Air insulation by the air layer for insulation, and insulation by resin foam,
Due to the two heat insulating functions, heat from the high-temperature chamber is reliably shut off, and the temperature at the interface between the heat insulating layer made of resin foam and the honeycomb material can be reduced to 95 ° C. or less, and the heat insulating layer made of resin foam Can maintain a stable performance. Therefore, it is possible to prevent the heat insulating layer from being deteriorated (brittle) due to heat and to prevent a peeling phenomenon between the surface plate and the heat insulating layer made of the resin foam.

[Brief description of the drawings]

FIG. 1 is a partially omitted cross-sectional view of a product of the present invention.

FIG. 2 is an enlarged perspective view of a main part in a manufacturing process of the heat insulating panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st surface plate 2 2nd surface plate 3 Heat insulation panel 4 Frame 5 Honeycomb material 6 Air layer for heat insulation 7 Heat insulation layer made of resin foam

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display F16L 59/06 F16L 59/06

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of metal surface plates arranged opposite to each other
(1) Honeycomb material (5) inside the first face plate (1) of (2)
Are joined to the second face plate (2) at a required interval,
Between the honeycomb material (5) and the second face plate (2), the honeycomb material
(5) A heat insulating panel provided with a heat insulating layer (7) made of an injection-foamed resin foam such that an air layer (6) for heat insulating is left inside.