JPH06316031A - Quasi-noncombustible panel - Google Patents

Abstract

PURPOSE:To prevent a hollow from being formed by melt-down of polyolefin resin of a core layer which is caused by touch of flame and to give quasi- noncombustibility in a panel having the structure of three layers wherein the sheathed sheets of aluminum are laminated and unified on both sides of the core layer constituted of polyolefin resin. CONSTITUTION:Polyolefin resin is used for a core layer 1 sandwiched between the sheathed sheets 2 of aluminum having a thickness of 0.15-0.4mm. An inorganic filler having water of crystallization is contained at 50-70% in the polyolefin resin. Thereby, when a panel is heated, the water of crystallization contained in the inorganic filler incorporated into the core layer 1 is discharged and melt-down of polyolefin resin incorporated into the core layer 1 is prevented. Further the panel is made quasi-noncombustible by controlling combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel used in many applications such as a construction board which requires a quasi-noncombustibility.

[0002]

2. Description of the Related Art A panel having a three-layer structure in which a foamed body of polyethylene resin or a non-foamed body of the same resin is provided in a core material layer, and an exterior plate made of aluminum is laminated and integrated on both sides of the core material layer. It has been conventionally known, and such a panel has been used, for example, as an indoor door material.

[0003]

In the conventional panel described above, when heated by a flame or the like, the polyethylene resin forming the core material layer sandwiched between the outer plates melts down between the outer plates on both sides. Since cavities were likely to be formed inside the core material layer, it could be damaged by a fire or operating heat of a machine such as building boards, especially interior and exterior boards, waist boards, partition boards, or covers of machines that generate heat. There is a problem in that it is difficult to use in applications where there is a high risk of being heated, and in applications where a large area panel is required.

The present invention has been made in view of the above circumstances, and by improving the characteristics of the core material layer by improving the above-mentioned conventional panel, a large area or a large area where heating is likely to occur. It is an object of the present invention to provide a panel having a three-layer structure that can withstand use in applications where the panel is required.

[0005]

A semi-combustible panel according to the present invention comprises a core material layer made of a polyolefin resin containing an inorganic filler and aluminum laminated on both sides of the core material layer. It is composed of an exterior plate and.

A semi-incombustible panel according to the invention of claim 2 is
A core material layer containing 50 to 70% of an inorganic filler having crystal water such as aluminum hydroxide or magnesium hydroxide and 30 to 50% of a polyolefin resin, and a thickness integrally laminated on both sides of the core material layer. The outer plate is made of aluminum and has a thickness of 0.15 to 0.4 mm.

[0007]

By constructing the quasi-incombustible panel according to the invention of claim 1, even if the polyolefin resin of the core material layer is heated and tries to be melted down, the melted-down inorganic material is contained in the polyolefin resin. It is prevented by the filler, and the polyolefin resin is less likely to be burned out, and voids are less likely to be formed in the core material layer.

Further, since the panel having the above structure has a sandwich structure in which a polyolefin resin core material layer is sandwiched between aluminum exterior plates, the rigidity of the polyolefin resin core material layer is not so great. The panel as a whole exhibits excellent rigidity.

Furthermore, since aluminum is used for the exterior plate, it is lightweight and excellent in workability, and it is easy to keep the appearance beautiful. Therefore, it is not only excellent in handleability such as carrying and workability in forming mounting holes, You can get a beautiful finish.

By constructing the quasi-incombustible panel according to the second aspect of the present invention, when the core material layer is heated, crystal water is released from the inorganic filler to suppress combustion and form a cavity in the core material layer. It does not occur, and quasi-noncombustibility is promoted by an aluminum exterior plate having a constant thickness.

[0011]

FIG. 1 is a partial sectional view illustratively showing a panel A according to an embodiment of the invention of claims 1 and 2.
This panel A is a panel having a three-layer structure including a core material layer 1 and exterior plates 2 and 2 which are laminated and integrated on both sides of the core material layer 1, and the core material layer 1 and the exterior plates 2 and 2 are provided. Are bonded by pressure using a one-component or two-component urethane-based or epoxy-based adhesive.

The core material layer 1 is made of a polyolefin resin containing an inorganic filler, and this polyolefin resin may be a foam or a non-foam. The use of the polyolefin resin is for the purpose of reducing the weight of the panel, and the use of the foam further promotes the weight reduction and the bending rigidity. However, in order to obtain a quasi-noncombustible panel, it is preferable to use a non-foamed material rather than a foamed material. The inorganic filler contained in the polyolefin resin is one or two selected from known inorganic substances such as calcium carbonate, magnesium hydroxide, aluminum hydroxide, calcium silicate and calcium hydroxide.
More than one kind can be used, and the blending amount is 20 to 70.
%, Preferably 50 to 70%. In particular, an inorganic substance having crystal water such as magnesium hydroxide, aluminum hydroxide or calcium silicate is preferably used as the filler. Further, a known flame retardant such as Br type, P type and antimony trioxide may be contained in the polyolefin resin in an amount of 2 to 10%. As the polyolefin resin, polyethylene, polypropylene, chlorinated polyethylene, a mixed resin of polyethylene and polypropylene and the like are used, and the compounding amount thereof is 30 to 80%, preferably 3
It is good to set it to 0 to 50%. When it is less than 30%, the force for binding the inorganic filler becomes weak and the strength of the core material layer is lowered. If it is 80% or more, quasi-noncombustibility cannot be obtained even if a flame retardant is added. 50 without flame retardant
It is necessary to keep the percentage below.

The exterior plate 2 is an aluminum plate.
This aluminum plate is preferably a plate that has passed JIS H4000 and has a thickness of 0.15 to 0.4 mm.

In the panel A having such a three-layer structure,
The inorganic filler contained in the core material layer 1 helps prevent the polyolefin resin of the core material layer 1 from being melted down when the panel A is heated. Therefore, since the polyolefin resin of the core material layer 1 contains the inorganic filler, the panel A becomes quasi-incombustible and may be heated by flames such as indoor building boards. Will be suitable for. In particular, when inorganic fillers with water of crystallization are used, these inorganic fillers release water of crystallization at 300 to 550 ° C to suppress combustion, and after decomposition they become alumina and act as heat-resistant materials, exposed to high temperatures. Since it shows noncombustibility even if it is applied, the whole core material layer is made semi-incombustible. In addition, by incorporating the above-mentioned flame retardant into the polyolefin resin of the core material layer 1, the incombustibility of the core material layer 1 is combined with the incombustibility of the inorganic filler to promote the quasi-incombustibility of the panel A. To be done. Therefore, the blending amount of the inorganic filler can be reduced, the weight of the panel A can be reduced, and the rigidity can be improved.

As described above, the content of the inorganic filler is 20 to 70%, preferably 50 to 70%.
If the content of the inorganic filler is less than 20%, the action of preventing the polyolefin resin from melting through when heated and the action of imparting incombustibility due to the release of water of crystallization tend not to be sufficiently exerted, and conversely, it is more than 70%. If it is too large, the core material layer 1 becomes too heavy and the handleability of the panel A is lowered, the mechanical strength such as bending is lowered, and the formability is also lowered. Especially, from 50
When the compounding amount is 70%, the impartation of quasi-nonflammability, weight reduction, strength and the like are kept in a good balance. The blending amount of the inorganic filler is not limited to 20 to 70%. For example, when it is desired to promote quasi-incombustibility even at the expense of handleability and moldability, the blending amount may be set to more than 70%. It is possible. The same applies to the amount of flame retardant compounded.

In order to adapt this panel A to use as a building board material such as an interior / exterior board, the total thickness is 3 mm.
It is desirable to set the degree to a certain degree or more so that even if the flame is directly hit, the situation in which the flame is too thin to break is unlikely to occur. Further, if the total thickness is suppressed to about 6 mm, good handleability and workability can be maintained. Further, the plate thickness of aluminum that is the exterior plate 2 may be set to about 0.15 mm to 0.4 mm. If the aluminum exterior plate 2 is too thin, the aluminum is rapidly weathered or oxidized due to direct contact with the flame, and the aluminum is likely to be in a tattered state at an early stage. It is desirable to set it. Further, when the aluminum exterior plate 2 is too thick, the exterior plates 2 and 2 are separated from each other by a thermal expansion / contraction difference generated between the core layer 1 and the exterior plates 2 and 2 as the panel A is heated. It peels off from No. 1 and causes a remarkable defect in appearance. From such a point of view, it is not preferable that the exterior plate 2 is made of an iron thin plate or a stainless steel plate that is not easily deformed, instead of aluminum. Therefore, the exterior plate 2 made of aluminum has a thickness of less than the above-mentioned peeling resistance, that is, about 0.4 mm or less, preferably 0.3 m.
It is desired to keep the thickness to m or less, and with such a thickness, even if there is a difference in thermal expansion and contraction rate between the core material layer 1 and the exterior plates 2 and 2, the exterior plates 2 and 2 are The core material layer 1 is deformed following the thermal expansion and contraction, and peeling hardly occurs.

As described above, in the panel A, the core material layer 1 is made of polyethylene resin containing 50 to 70% of an inorganic filler containing water of crystallization, and the exterior material 2 is made of an aluminum plate of 0.15 to 0.4 mm. Then, by setting the whole to 3 to 6 mm, quasi-noncombustibility is imparted, and the application as a building board material is expanded.

When the panel A is used for a building board material or the like, it is possible to form a baked coating film of urethane or the like on the surface of the exterior board 2, apply embossing, or perform other decoration processing. . Not only in places where there is little danger of being heated by flames such as outdoors, but also interior and exterior plates, partition plates, waist plates, face plates of counters, blinds and fences for buildings, various containers, containers, various cases, machinery It has an effect that it can be widely used for a wide range of applications such as places where there is a risk of being heated such as covers and applications requiring a large area. In addition, handling and processability,
It also has excellent impact resistance and is easy to obtain a good finish.

[0019]

Since the semi-incombustible panel according to the invention of claim 1 contains the inorganic filler in the core layer, the polyolefin resin does not melt down even when the panel is heated, and the semi-incombustible panel has It can be suitably used for required building boards and the like.

The semi-incombustible panel according to the invention of claim 2 is
Since the core material layer contains 50 to 70% of the inorganic filler and it has crystal water, when the panel is heated, the crystal water is released to suppress the combustion and to be semi-incombustible throughout the panel. Imparts sex. In addition, since aluminum, which is the exterior plate, has a thickness of 0.15 to 0.4 mm, it does not become fragile by heating or peel off from the core layer, which may cause a remarkable defect in the appearance of the panel. There is no effect.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view illustratively showing a panel A according to an embodiment of the invention of claims 1 and 2. FIG.

[Explanation of symbols]

 A panel 1 core layer 2 exterior plate

Claims (2)

[Claims] 1. A quasi non-combustible panel comprising a core material layer made of a polyolefin resin containing an inorganic filler, and an exterior plate made of aluminum laminated and integrated on both sides of the core material layer. 2. An inorganic filler containing water of crystallization such as aluminum hydroxide or magnesium hydroxide in an amount of 50 to 70%,
A core layer containing 30 to 50% of a polyolefin resin, and a thickness of 0.15 to 0.4 laminated and integrated on both sides of the core layer.
A quasi-noncombustible panel, which is formed of an exterior plate made of aluminum of mm.