JPS6132749Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fire-resistant insulation panel that is useful for buildings and structures, particularly in heat-insulating and fire-resistant parts.

Recently, thermal insulation structures are being encouraged and introduced in various fields in order to save energy. Particularly in the field of architecture, its introduction is being rapidly carried out. but,
The Building Standards Law imposes various regulations on base materials used as building materials, such as requiring the use of quasi-incombustible base materials for fireproof structures and non-combustible materials for high-rise buildings. On the other hand, in terms of heat insulation properties, synthetic resin foams, among other well-known base materials, for example, polyurethane foam (density 40Kg/m ³ ),
It shows a thermal conductivity of 0.025Kg/m・h・℃, and cement mortar shows 1.3kcal/m・h・℃. As is clear from this, there is a very large difference in thermal insulation performance. Therefore, synthetic resin foams are now often used as building materials. However, most synthetic resin foams lack fire retardant properties and heat resistance, and even if they do have provisional fire retardant properties, there is a need for major improvements in terms of cracking and brittleness for use as core materials in building materials. Ta.

Therefore, some panels with a composite structure in which a thin metal plate (for example, a colored steel plate) and a fire-resistant and heat-insulating phenol foam are integrated are being put into practical use.
However, in panels with a composite structure in which colored steel sheets and phenol foam, etc. are directly injected (without adhesive), so-called in-situ foaming, and integrated,
○Because the form is brittle, cohesive failure occurs in the form at the boundary between the metal substrate and the form. ○B It is difficult to spread the foam raw material evenly on the metal substrate. That is, since the viscosity of the raw material increases rapidly from a liquid state, it becomes difficult to distribute the raw material evenly in a thin film form in a liquid state. C) It was impossible to form a skin layer of uniform density because the reaction state of the foam raw material in contact with the metal substrate was non-uniform. ○Niform itself is brittle and lacks elasticity, so it cannot follow external forces and deformation, and these deformations have the disadvantage of appearing as cracks in the form.Overall, this results in a lack of adhesive strength between the metal substrate and the form. There was a lack of strength due to the brittleness of the foam, and a corresponding weakness in fire resistance. To explain further, ○B is between a member with a high elastic modulus (105 to 106 Kg/cm ² ) such as a metal plate and a rigid adhesive layer at the contact area of the synthetic resin foam with the metal plate. The adhesive layer is unable to follow the elastic deformation of the metal, and as a result, the internal stress of the adhesive layer cannot be alleviated, leading to high stress concentration at the bonded portion and failure. ○B and ○C are due to the fact that the adhesive strength differs depending on the contact area between the adhesive layer and the adherend (metal plate).

In other words, the cell structure of phenol foam etc. forms a large air layer between the metal substrate and the foam, which results in a significant reduction in the adhesion area. This results in areas where the foam has not adhered between the synthetic resin foams. Therefore, the formation of a firm skin layer will not be achieved. Furthermore, fire-resistant synthetic resin foams undergo a rapid polymerization reaction, the viscosity of the raw material is higher than that of other synthetic resin foams, and the foam itself is brittle, so it is difficult to resist the effects of simple shocks. It is presumed that this is also directly transmitted to the adhesive layer of the foam, and that it cannot be absorbed in this area, leading to destruction.

In order to eliminate these drawbacks, the present invention incorporates this foam between the metal substrate and the synthetic resin foam, and provides cushioning properties, flexibility, and a through gap through which the synthetic resin foam raw material passes. It is structured so that a glass fiber non-woven fabric with the above non-woven fabric is integrally interposed, and the synthetic resin foam that has passed through the non-woven fabric fixes the metal substrate together, mainly without impairing the heat insulation properties of the synthetic resin foam. It also acts usefully as an adhesive and a core material, and can also be used as a cushioning material between a metal substrate and a synthetic resin foam, a crack prevention material for a synthetic resin foam, a reinforcing material, and a part of a synthetic resin foam. To provide a fireproof heat insulating panel in which the synthetic resin foam acts as a useful adhesive and the synthetic resin foam does not crack under high heat.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fireproof insulation panel (hereinafter simply referred to as a panel) according to the present invention will be described in detail below with reference to the drawings. Fig. 1 is an explanatory diagram showing a panel in which a metal substrate is provided only on one side of a synthetic resin foam. 1 is a metal substrate, which is made of surface-treated steel plate, aluminum plate, stainless steel plate, etc. This material is formed into a flat plate or a gutter shape depending on the purpose. The above-mentioned surface-treated steel sheets include galvanized steel sheets, metal crimped steel sheets, chemical conversion treated steel sheets, inorganic coated steel sheets, organic coated steel sheets, organic laminated steel sheets, organic film sprayed steel sheets, and the like. Reference numeral 2 is a synthetic resin foam made of a material that exhibits slight dimensional deformation at least at high temperatures, forms a carbonized layer, and functions as a heat insulating layer at high temperatures and in normal conditions. Specific examples include phenolic resin foam (phenol foam), polyisocyanurate foam, etc.
In particular, this foam is obtained by molding a resin raw material into an in-situ foam. 3 is a glass fiber nonwoven fabric, which is a nonwoven fabric made of fibers, and has a net-like physical structure with about 50% or more of through-gaps between the fibers;
Moreover, it has a thickness of about 0.1 to 3 mm and has cushioning properties. To explain further, the nonwoven fabric 3 is brought into contact with the back surface of the metal substrate 1 in a state where the synthetic resin foam raw material is passed through and the reaction system of the foam raw material is made uniform to strengthen the adhesive force and to strengthen the adhesive force between the metal substrate 1. It also functions as a cushion material that absorbs the elastic deformation of the synthetic resin foam 2 so that it is not directly transmitted to the synthetic resin foam 2. In addition, the glass fiber nonwoven fabric 3 incorporates the glass fiber nonwoven fabric 3 into the synthetic resin foam 2 by passing the synthetic resin foam raw material, and also makes the reaction system of the foam raw material almost uniform, and the through-holes of the glass fibers are Since the reaction of the raw material that has passed has been accelerated, it comes into contact with the metal substrate 1 with uniform properties and forms a uniform skin layer, thereby greatly improving adhesive strength. For example, glass fiber nonwoven fabric 3 (thickness 3mm, 260g/
^m2 , porosity 50%) JIS-A-
Test by 1613 (phenol foam adhesive strength)
0.9Kg/cm ² with non-woven fabric, 0.1Kg/cm 2 with non-woven fabric.
^cm2 , and a large difference was observed. In addition, the failure when the glass fiber nonwoven fabric 3 was used was cohesive failure, and in the comparative example, it was interfacial failure.

Next, to briefly explain the manufacturing method of the panel according to the present invention, first, for example, a colored iron plate (flat plate) is placed on the lower mold, a glass fiber non-woven fabric is laid on this, and a phenolic resin (1 mole of phenol) is placed on this. On the other hand, 37% formalin was blended at a ratio of 1.6 mol, and the pH was adjusted to 5 using other well-known means, and 100 parts by weight of a stable resol type phenolic resin initial condensate), 3 parts of surfactant (silicon), and a blowing agent. (Dyclone Solvent), coloring agent (this is called Part A), and hardening agent (50% toluene sulfonic acid).
Aqueous solution) is mixed with 40 parts by weight (this is called liquid B) and discharged. An upper mold was placed on top of it and heated to foam and harden. When the panel obtained in this manner was cut and observed, it was found that the phenolic resin passed through the voids in the glass fiber nonwoven fabric 3 and filled the voids in the glass fiber nonwoven fabric 3 with phenol foam, as shown in an enlarged view in FIG. At the same time, a high-density thin film-like skin layer with excellent adhesive strength was formed between the metal substrate 1 and the phenol foam 2. This is because the formation of the skin layer and the wetting of the metal substrate 1 and the phenol foam 2 raw material were good. In addition, even if an external force is applied to the metal substrate 1, the phenol foam 2 is difficult to crack, and even if the metal substrate 1 side is exposed to high heat (900°C for 10 minutes), there is no crack on the back side of the phenol form 2. It was something I couldn't reach.

What has been described above is only one embodiment of the present invention.
For example, as shown in Figure 3a, the same structure as above is provided on both sides of the synthetic resin foam, or as shown in Figure 3b, waterproof paper such as asphalt felt or synthetic resin film, or a glass fiber nonwoven fabric similar to that described above is provided. It is also possible to provide one. Furthermore, as shown in FIG. 3c, the metal substrate 1 can be formed into a gutter shape and the panel structure according to the present invention can be formed therein. Although not shown, it is also possible to produce a panel by discharging phenolic resin onto the glass fiber nonwoven fabric 3 under tension, foaming and curing it, and taking it out after sufficient curing.

As mentioned above, according to the panel according to the present invention,
By using a special glass fiber non-woven fabric, we can solve the problem of bonding between phenol foam, etc., which lacks adhesive properties, and metal substrates, all at once by relieving the wetting and internal stress necessary for bonding.
At the same time, since the constituent materials are integrated, the mechanical strength of the panel is improved and the adhesive force between the constituent members is strengthened. Even when the metal plate expands and contracts, the adhesive layer follows and expands and contracts. Therefore, it has the characteristics of greatly improved fracture, peeling, splitting, and shearing.

[Brief explanation of drawings]

The first is an explanatory view showing one embodiment of the fireproof heat insulating panel according to the present invention, the second is an explanatory view showing an enlarged part of the panel, and the third a to c are longitudinal sectional views showing other embodiments. be. 1...Metal substrate, 2...Synthetic resin foam, 3
...Glass fiber non-woven fabric.

Claims (1)

[Scope of utility model registration request] metal substrate and polyisocyanurate foam,
A nonwoven fabric made of fibers between a synthetic resin foam that forms a carbonized layer under high heat, such as phenol foam, which functions as a core material and adhesive. A glass fiber nonwoven fabric that has through-spaces between the fibers and also has cushioning properties. The voids were filled with synthetic resin foam and fixed together, and the synthetic resin foam passed through the glass fiber nonwoven fabric was integrally formed as a high-density adhesive layer between the glass fiber nonwoven fabric and the metal substrate. A fireproof insulation panel characterized by: