JPS5931454B2 - sandwich panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a sandwich panel using a honeycomb structure as a core material.

Generally, honeycomb structures are known as lightweight structures with relatively high mechanical strength, and are widely used as construction members.

However, since the honeycomb structure has extremely large voids, it has poor heat insulation properties and can only be expected to have low performance, which is hardly a problem in terms of fire protection. Further, the conventional bonding structure between the honeycomb structure and the plate material had a disadvantage of lacking adhesive strength because the contact area was small. In addition, this fixing work is extremely complicated and requires precision, which is a major cause of high costs. One objective of the present invention is to
Even if there are dimensional deviations between each member due to manufacturing errors, etc., this can be fully absorbed, and the fixing work can be made more efficient by using a foamed structure that serves as insulation and has already been bonded to ensure proper adhesion. In addition to improving the yield, another purpose is to incorporate a foamable inorganic material that forms an inorganic foam layer at high temperatures into the heat insulating and adhesive layer, as well as to improve the fireproofing performance of the honeycomb structure, which lacks fire resistance. To obtain a sandwich panel which is filled with an inorganic foam layer and has outstanding fire resistance. Furthermore, the main purpose was to provide a foam layer and an inorganic foam layer to replace conventional panels that lack heat and sound insulation properties.
The object of the present invention is to obtain a sandwich panel in which the above performance is greatly improved by filling the hollow portions of a honeycomb structure with fireproof particles. EMBODIMENT OF THE INVENTION Below, the sandwich panel (hereinafter simply referred to as a panel) according to the present invention will be explained in detail using the drawings.

That is, the present invention has two parts, one of which is a panel as shown in FIG. 1, and the other a panel as shown in FIG. To explain further, in the figure, 1 is a honeycomb structure (hereinafter simply referred to as honeycomb) made of asbestos paper.
It is made of one type of metal thin plate, ceramic paper, etc., and mainly functions as a member for storing a core material, an inorganic foam layer (described later), and fireproof granules. Reference numeral 2 denotes a plate member which is integrally fixed to the opening surface of the honeycomb 1 via a heat insulating and adhesive layer 3, and is made of noncombustible materials such as barbed metal plates, plasterboards, calcium silicate plates, and asbestos paper. It consists of one or more types.

In addition, a heat insulating and adhesive layer (hereinafter simply referred to as foam) 3
The gap between the honeycomb 1 and the plate member 2 is shaped to have the thickness of a foam layer instead of the conventional film-thick adhesive layer. Moreover, the foam 3 bulges out toward the hollow part 4 as shown in the figure except for the part where the honeycomb 1 is present, and is mainly used for adjusting the gap between the honeycomb 1 and the plate member 2, bonding between the two members, It contains a heat insulating layer and a foamable inorganic material 5 and functions as a fireproof layer.
To explain further, the foam 3 is made of a foamable synthetic resin, such as one of polyurethane foam, polyisocyanurate foam, epoxy foam, area foam, and phenol foam. Hey...
When forming the foam 3, the raw material is discharged onto the plate member 2, and is fixed together through self-adhesion during reaction and foaming, and the foam is also formed. Furthermore, the foam 3 protects the foamable inorganic material 5 from water and moisture, and is useful for maintaining fireproof performance over a long period of time. In addition, the foamable inorganic material 5 is mixed in the foam structure of the foam 3, and mainly forms an inorganic foam layer under high heat to protect the foam 3 from high heat and improve the fire resistance of the panel itself. This is what we aim to do. Examples of the foamable inorganic material 5 include sodium silicate, sodium metasilicate, Tsuda orthosilicate,
Sodium metaborate, (2, 4, 5, 6, 8) sodium borate,
(1st, 2nd, 3rd) It consists of one type of sodium phosphate, a mixture of these two types, etc. Furthermore, the foamable inorganic material 5 has the general formula XNa2O・YB2O3・
When expressed as ZH2O, 0.25≦x/y≦1.50
, 0.8(x+y)≦X≦5(x+y) is also considered to be effective. As a specific example, 80g of boron oxide
, 70 g of sodium hydroxide and 162 g of water are mixed and stirred to form a product. 6 is an inorganic foamed grain (hereinafter simply referred to as foamed grain) and honeycomb 1
It fills the sealed hollow part 4 formed between the foam 3 and the foam 3, and mainly functions as a sound insulating material, a heat insulating material, a fireproof material, and a reinforcing material.

Specific examples thereof include pearlite particles, bubble gas particles, shirasu balloons, calcined vermiculite, and other artificial aggregates, which are made of particles that are relatively lightweight. Of course, it is not limited to just one of these types, but you can also mix and fill several types,
It is possible to fill the hollow portion 4 by mixing foam particles 3 having different particle sizes.

7 is a fireproof granule, and 1 of the foamable inorganic material 5 is filled in the internal void of the foamed granule 6.
When exposed to high heat, it releases moisture and gradually foams to form an inorganic foam layer.Finally, it becomes foam particles 6 as aggregate in the foam layer. It functions in the same way.

Next, an example of a method for manufacturing a panel according to the present invention will be described. Two typical methods for manufacturing the above-mentioned panel are a continuous method and a patch method using a mold.

Therefore, an explanation will be given here using the case of the so-called patch method as an example. First, lay asvenut paper on the bottom mold.
Next, a polyol (including a blowing agent, a foam stabilizer, and a catalyst) and a polyisocyanate are mixed by a one shot method, and then a foamable inorganic material 5, for example, 150 meshes of borax is mixed therein, and the raw material is mixed into the plate member 2. , e.g., onto asbestos paper. The honeycomb 1 is placed on top of this with the opening side facing down, and the hollow part 4 of the honeycomb 1 is filled with foam particles 6, for example, pearlite particles with a particle diameter of 3 mmφ, and then asbestos paper is placed in the same manner as above. The raw material is discharged and stacked so that the raw material is in contact with the other open surface of the honeycomb 1, an upper mold is placed on the honeycomb 1, and the honeycomb is cured at 70° C. for a certain period of time. As described above, the sandwich panel according to the present invention exhibits excellent heat insulation and heat retention properties because the foam is interposed between the honeycomb and the plate member.

In addition, since the honeycomb and plate members were fixed with a foamable synthetic resin raw material that also serves as adhesive and changes from liquid to foam, moldability is improved.
It has good processability and workability, can easily absorb manufacturing errors in each member, has high bioacidity, and is inexpensive. Furthermore, since the hollow part formed by such a constituent material is filled with foam particles and fireproof particles, it has fire resistance, sound insulation, and heat insulation properties, and has a light specific gravity, so it does not impair the characteristics of the honeycomb. It has the characteristic that mechanical strength can be improved without using it. In addition, in the event of a fire, the foamable inorganic material inside the foam foams to form an inorganic foam layer, and then there is a fireproof layer made of foam particles in the center, so it provides sufficient insulation even under high heat. It has characteristics that can protect the panel.

[Brief explanation of drawings]

FIGS. 1 and 2 are longitudinal sectional views showing an enlarged part of the sanderch panel according to the present invention. 1... Nicum structure, 2... Plate member, 3... Heat insulation/adhesive layer, 4... Hollow part, 5... ...Expansible inorganic material, 6...Inorganic foam granules, 7...Fireproof granules.

Claims (1)

[Scope of Claims] 1. A non-combustible plate member is brought into contact with both open faces of the honeycomb structure, and a heat insulating and adhesive layer made of synthetic resin foam is interposed between the both open faces and the plate member to integrate the honeycomb structure. In the sandwich panel, a foamable inorganic material that forms an inorganic foam layer at high temperature is mixed in the heat insulation/adhesive layer, and a hollow part formed between the honeycomb structure and the heat insulation/adhesive layer is mixed. A sandwich panel characterized by being filled with inorganic foam particles. 2. A sandwich panel in which a non-combustible plate member is brought into contact with both opening surfaces of a honeycomb structure, and a heat insulating and adhesive layer made of synthetic resin foam is interposed between the opening surfaces and the plate member. A foamable inorganic material that forms an inorganic foam layer under high temperature is mixed in the heat insulation/adhesive layer, and inorganic foam particles and inorganic foam are mixed in the hollow portion formed between the honeycomb structure and the heat insulation/adhesive layer. A sandwich panel characterized in that the internal gaps of the grains are filled with a mixture of fireproof grains impregnated with the foamable inorganic material.