JPH10266404A - Fire-resistant panel reinforced with spiral metal wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the cracking of a core material at the time of a fire, increase strength, make a panel lightweight, and improve the fire resistance by inserting a spiral metal wire into a resin foaming body blended with an inorganic flame retarder and filled between metal face plates. SOLUTION: A nonflammable resin foaming body 1 such as resol resin phenol foam is pinched between metal face plates 2, 3 made of a zinc-plated steel sheet to form a heat-resistant panel. A spiral metal wire 4 is inserted into the nonflammable resin foaming body 1 to form a fire-resistant core material having strong bending strength. The occurrence of cracks on the panel is suppressed when the face plates 2, 3 are heated and deformed and the foaming body 1 is carbonized at the time of a fire. The fire-resistant time of the panel is extended, and the fire resistance can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire-resistant panel which is filled with foam between metal face plates and has excellent appearance, strength, light weight and fire resistance.

[0002]

2. Description of the Related Art Conventionally used fireproof panels include lightweight panels made of foamed concrete, panels formed by sandwiching a core made of foamed synthetic resin with a metal plate, and foamed synthetic materials containing a foamed lightweight aggregate such as perlite. There is a panel in which a resin core material is sandwiched between metal plates. For example, N
a panel in which a polyisocyanurate foam is sandwiched between metal plates coated with a ₂ O, B ₂ O _3, etc. (JP-A-53-27223); A sandwich panel in which a refractory layer, a non-combustible plate and the like are laminated (Japanese Patent Application Laid-Open No. 55-90352), a sandwich panel in which a phosphate cement foam is injected between face materials, and the like (Japanese Patent Application Laid-Open No. 6-138551) are known. ing.

[0003]

Panels made of foamed concrete are excellent in fire resistance, but are quite heavy, and require large equipment for construction. In addition, since the concrete is exposed on the surface, a finish painting is required after the construction and the like, so that the construction period becomes long. A metal panel sandwiched with a foam synthetic resin core material,
Light weight, but poor heat resistance and fire resistance. That is, when heated by a flame, the metal plate swells and deforms, causing a crack in the core material, and has a disadvantage that the cracked core material easily falls into a gap between the metal plate and the resin deformed by thermal expansion. . Further, in the case of the core material containing the foamed lightweight aggregate, the adhesive strength to the face material is locally reduced, and the bending strength of the panel is reduced. Moreover, if the net is to be inserted at a predetermined height in the panel during the manufacture of the fireproof panel, it is necessary to separately insert a spacer for regulating the position of the net, which complicates the operation. The present invention has been devised to solve such a problem. By inserting a spirally shaped metal wire, large cracks in the core can be suppressed, and the appearance, strength, lightness and lightness can be reduced. An object of the present invention is to provide a fireproof panel excellent in fire resistance.

[0004]

The fireproof panel of the present invention comprises:
In order to achieve the object, a resin foam containing an inorganic flame retardant, a spiral metal wire inserted inside the resin foam, and a metal face plate bonded to both surfaces of the resin foam are used. It is characterized by having.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fireproof panel according to the present invention has a structure in which a resin foam 1 is sandwiched between metal face plates 2 and 3 as shown in FIG. Metal face plate 2,3
, A metal plate having a plate thickness of 0.2 to 2.0 mm is used.
Specifically, various surface-treated steel sheets, Zn-plated steel sheets, Zn
-Al plated steel sheet, Al plated steel sheet, Cu plated steel sheet,
There are an Al plate and a painted Al plate. Generally, it is a flat metal plate, but a metal plate having improved design and strength by embossing or bending by a roll forming machine or the like can also be used. As the resin foam 1, a foamed resin such as urethane foam, isocyanurate foam, and phenol foam is used. Among them, a phenol foam resin foam having excellent flame retardancy is preferable. The phenol foam is classified into a resol resin type and a novolak resin type, and the resin foam 1 for a fireproof panel is preferably a resol resin type.

[0006] The foaming resin includes phenolsulfonic acid,
Hardeners such as organic sulfonic acids such as p-toluenesulfonic acid, xylenesulfonic acid and benzenesulfonic acid; volatile oils such as petroleum ether, naphtha, pentane and hexane;
Blowing agents such as low-boiling hydrocarbons such as methylene chloride, carbon tetrachloride, trichloroethane, fluorotrichloromethane, and trifluorotrichloromethane; polyoxyethylene nonylphenyl ether; polyoxyethylene lauryl ether; polyoxyethylene sorbitan stearate; A foaming agent such as a nonionic surfactant such as oxyethylene castor oil fatty acid ester and polyoxyethylene dimethyl silicon is appropriately added. Resol resin foam
By adding a foaming agent, a foaming agent, etc. to a resole resin obtained by reacting phenol and formaldehyde under an alkaline catalyst to prepare a resole resin compound, and foaming and curing the resole resin compound with the above-described curing agent. Manufactured.

In the production of the resin foam 1, a powdery inorganic flame retardant having water of crystallization is blended into the resin compound. As the inorganic flame retardant, aluminum hydroxide, magnesium hydroxide, gypsum, borax, boric acid, zeolite, aluminum phosphate and the like are used. The added flame retardant exhibits an endothermic effect due to thermal decomposition near the thermal decomposition temperature of the resin, and exhibits a diluting effect with a large amount of nonflammable gas such as water vapor generated during decomposition to suppress resin combustion. I do. The powdered inorganic flame retardant having water of crystallization is preferably blended in an amount of 5 parts by weight or more based on 100 parts by weight of the resin in order to obtain a predetermined fire resistance. When the amount of the flame retardant is less than 5 parts by weight, the fire resistance is poor. However, 150
When a large amount of flame retardant exceeding part by weight is blended, the liquid viscosity of the resol resin compound is significantly increased. As a result, the foaming behavior may be adversely affected, and the resin may not foam.

The resin foam 1 has a helical metal wire 4 inserted therein to become a refractory core material. The spiral metal wire 4 improves the bending strength of the refractory core material, and the resin foam 1 that is easily generated when the heated resin foam 1 is decomposed and contracted.
Suppress cracks. As the spiral metal wire 4, a wire having a thickness in the range of 0.4 to 4 mm is used. In consideration of workability, weight, rigidity, etc., a wire having a thickness of 0.8 to 1.5 mm is preferable, and the helical diameter D is adjusted within a range from half the thickness of the panel core material to the same thickness. If the helical diameter D is thicker than the panel core material, the helical metal wire 4 is crushed or a large force is required for installation when the upper plate is applied and installed to a predetermined thickness. On the other hand, when the helical diameter D is less than half the thickness of the panel core, the effect of preventing cracking of the refractory core caused by heating decreases.

The spiral pitch P of the metal wire 4 is shorter than the thickness of the panel to be used, and is preferably 5 mm or more.
When the helical pitch P is longer than the panel thickness, the effect of preventing cracking of the refractory core material caused by heating decreases.
On the other hand, when the helical pitch P is smaller than 5 mm, there is a tendency that foaming of the foamable resin is hindered. The spiral metal wire 4 may be inserted in the width direction of the refractory panel, but is preferably in the longitudinal direction of the refractory panel in consideration of continuous production. The spiral metal wire 4 can be inserted into the resin foam 1 without the need for a spacer or the like for regulating the insertion height because of the spiral shape. The number of spiral metal wires 4 to be inserted is preferably an amount that sufficiently fills the inside of the fireproof panel. Further, as shown in FIG. 2 in which the refractory panel is viewed from a direction perpendicular to FIG. 1, it is preferable to insert a plurality of spiral metal wires 4 so as to overlap each other by about a quarter.

[0010]

【Example】

Example: A resole resin (BRL257Z manufactured by Showa Polymer Co., Ltd.) was used as a core material. Resol resin 10
0 parts by weight of a curing agent (ARL manufactured by Showa Polymer Co., Ltd.)
013) 23 parts by weight, aluminum hydroxide 60 parts by weight,
60 parts by weight of boric acid were added, and the mixture was mixed and stirred to prepare a foamable resin compound. As the spiral metal wire 4, a Zn-plated wire having a diameter of 1 mm was formed with a spiral diameter D =
What was formed into a spiral shape having a spiral pitch of 68 mm and a spiral pitch P of 10 mm was used. A helical metal wire 4 was arranged inside one metal face plate 2 serving as a bottom plate, filled with a foamable resin compound, and the other metal face plate 3 was covered. And 6
By heating to 0 ° C. for 15 minutes, the filled resin was foamed to produce a fireproof panel having a length of 500 mm, a width of 500 mm, and a thickness of 35 mm. Comparative Example: A refractory panel was manufactured under the same conditions as in the example without inserting a spiral metal wire.

[0011] Several pieces of the obtained fireproof panels were used according to JIS A1.
A fire resistance test was carried out in accordance with 304 "Fire resistance test method for building structures", and the temperature reached to the back side of the panel was measured using the carbonization start temperature of wood of 260 ° C as the evaluation temperature. As can be seen from the measurement results of FIG. 3, in the fireproof panel of the comparative example in which the spiral metal wire 4 was not inserted, the back surface temperature was 260 ° C. in about 58 minutes.
Exceeded. On the other hand, in the fireproof panel of the embodiment in which the spiral metal wire 4 was inserted, the rear surface temperature was 260 ° C. in 75 minutes.
, Which indicates that it has excellent fire resistance. Each panel after the fire resistance test was disassembled, and the phenol foam used as the core material was examined for deterioration. In the fireproof panel of the comparative example, as shown in FIG. 4, a large crack 5 was generated in the core material, and it is considered that the fireproof time was reduced due to this. On the other hand, in the fireproof panel of the example, although cracks 5 occurred as shown in FIG. 5, none of them was small and no large crack was detected. This also indicates that the fireproof panel of the present invention exhibits excellent fire resistance.

[0012]

As described above, in the fireproof panel of the present invention, the helical metal wire is inserted into the resin foam to reinforce the core. Generation of a large crack is suppressed. As a result, the fire resistance time is prolonged, and it can be used as a building material for various buildings and structures requiring fire resistance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a refractory panel according to the present invention as viewed from the side of a spiral metal wire.

FIG. 2 is a cross-sectional view of a fireproof panel according to the present invention as viewed from a longitudinal direction of a spiral metal wire.

FIG. 3 is a graph showing the effect of the insertion of a spiral metal wire on the improvement of fire resistance.

FIG. 4 is a cross-sectional view showing that a large crack has occurred in a core material after performing a fire resistance test on a fire resistant panel into which no spiral metal wire is inserted.

FIG. 5 is a cross-sectional view showing that no large cracks have occurred in a core material after a fire resistance test of a fireproof panel into which a spiral metal wire is inserted.

[Explanation of symbols]

1: Foam made of resin 2, 3: Metal face plate 4:
Spiral metal wire 5: Crack D: Spiral diameter P: Spiral pitch

Claims (1)

[Claims] 1. A resin foam containing an inorganic flame retardant, a spiral metal wire inserted inside the resin foam, and a metal face plate bonded to both surfaces of the resin foam. Fireproof panel reinforced with spiral metal wire.