JPH106419A - Double-layered panel made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-layered panel made of a synthetic resin used in a wall surface or roof surface of a building. SOLUTION: In this double-layered panel made of a synthetic resin wherein wall members 2 are formed between two upper and lower skin layers 1, the wall members 2 respectively cross each other and independent hollow chambers 3 are formed between the wall members 2 crossing each other and the skin layers 1 and, since the hollow chambers 3 are independent, heat insulating effect is high and no contaminant enters the hollow chambers 3 and, since two upper and lower skin layers 1 are held by the wall members arranged in two directions, even if this double-layered panel is bent in any direction, sufficient yield strength is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin multi-layer plate used for walls and roofs of buildings and the like.

[0002]

2. Description of the Related Art Conventionally, as a hollow synthetic resin multilayer plate having an air layer between the front and back skin layers, a plurality of parallel walls are formed between the front and back skin layers along the extrusion direction by extrusion molding. In some cases, a hollow chamber was formed between the wall and the skin layer. This kind of synthetic resin multi-layer board has a hollow space formed inside, so it has higher heat insulation than single board, and the front and back skin layers are connected by a wall over a long direction. Therefore, it had sufficient strength against bending stress in the longitudinal direction.

Japanese Patent Laid-Open Publication No. Hei 3-32829 discloses a honeycomb plate structure in which honeycomb plates are laminated inside, and a large number of minute through holes are formed in an outer plate adhered to one surface of the honeycomb plate. A honeycomb plate structure characterized by being perforated has been proposed. Since this honeycomb plate has a large number of small through holes formed in its outer plate, there is no residual organic solvent when the outer plate and the honeycomb core are bonded, so that long-term reliability can be obtained structurally. It has an effect.

[0004]

However, in the above-mentioned synthetic resin multilayer body, since the hollow chambers are continuous and the ends thereof are open, there is a flow of air or convection. Even if the heat insulation effect is not enough, even if terminal treatment is performed by covering both ends of this synthetic resin multilayer body with caps etc.,
When the terminal treatment is incomplete, there is a problem that dirt enters the hollow chamber and it is difficult to clean the inside.
Further, there is a problem in that although it has sufficient strength against bending stress in the longitudinal direction, it does not have sufficient proof stress against bending stress in the width direction.

In the honeycomb core proposed in Japanese Patent Application Laid-Open No. 3-32829, minute through holes are formed in one of the outer plates, so that dirt and the like enter through the minute holes and become hollow. There is a problem that dirt easily accumulates in the room and the strength of the outer panel is slightly inferior. Moreover, since the outer plate and the honeycomb plate are bonded to each other, it is difficult to obtain a multilayer plate having high transparency.

Accordingly, the present inventor has conducted intensive studies in view of the conventional drawbacks, and as a result, has invented a synthetic resin multilayer body which is hardly stained inside and has sufficient strength against bending stress in any direction. Was.

[0007]

According to a first aspect of the present invention, there is provided a synthetic resin multilayer board having a wall formed between two upper and lower skin layers. Are formed as walls intersecting with each other, and the intersecting walls and the hollow layers are formed between the skin layers, and the hollow chambers are independent of each other. Since the upper and lower skin layers are held by the bidirectional walls without entering the interior of the hollow chamber, they have sufficient strength against bending in any direction.

Further, the synthetic resin multilayer body according to the second aspect of the present invention is formed by extruding a skin layer and a wall body before curing the extruded resin, and continuously forming and manufacturing the same. In addition, the skin layer and the wall are completely integrated, so that it is possible to more completely prevent invasion of dirt into the inside of the multilayer body. or,
Since it is manufactured without using an adhesive or the like, there is no need to take measures against the residual solvent, and since continuous molding is used, high productivity can be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of an embodiment of the synthetic resin multilayer body of the present invention. Skin layer 1 and skin layer 1
Are connected by a large number of wall bodies 2 connected between the skin layers to form a multilayer body having an appropriate thickness. This wall 2
Are formed so as to intersect each other between the skin layer 1 and the inner wall of the skin layer 1, and when the bending stress is applied to the skin layer 1, the skin layer 1
And the skin layer 1 work integrally, and both the section modulus and the second moment of area are made large. Also, wall 2
The hollow chamber 3 formed by the skin layer 1 is provided independently of each other, so that the heat insulating property is high and dirt and the like do not enter the hollow chamber.

The multilayer body of the present invention comprises polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS resin,
It is generally manufactured continuously by extrusion molding from a thermoplastic resin such as polycarbonate and acrylic resin, but it is preferable to use polycarbonate or acrylic resin having excellent transparency and high rigidity.

In the multilayer body of the present invention, the wall body 2 and the skin layer 1 are separately extruded by using two extruders by extrusion molding, and are united at the nozzle tip. The skin layer 1 is formed by forming to have smoothness. Granted. The skewed portion of the wall 2 is formed by extrusion molding while reciprocating the mold in the horizontal direction.

As another method for producing the synthetic resin multilayer body, air is intermittently injected from a plurality of nozzles alternately to extrude the synthetic resin while alternately producing independent hollow chambers. It may be produced by forming upper and lower skin layers.

[0013]

As described above, the synthetic resin multilayer body according to the first aspect of the present invention is a synthetic resin multilayer board in which a wall is formed between two upper and lower skin layers. Are formed as walls intersecting with each other, and independent hollow chambers are respectively formed between the intersecting wall bodies and the skin layers.The hollow chambers are independent of each other, so that the heat insulating effect is high, and the dirt is hollow. Since the upper and lower skin layers are held by walls in different directions without entering the interior of the room, they have sufficient strength against bending in any direction.

Further, the synthetic resin multilayer body according to the second aspect of the present invention is formed by extruding the skin layer and the wall body integrally before the extruded resin is cured, and is continuously formed and manufactured. In addition, the skin layer and the wall are completely integrated, so that it is possible to more completely prevent invasion of dirt into the inside of the multilayer body. or,
Since it is manufactured without using a solvent, there is no need to take measures against residual solvent, and the junction between the skin layer and the wall pair is uniform and has high transparency. Further, continuous molding enables high productivity to be obtained. For roofing materials that require high transparency and high rigidity, high rigidity can be obtained irrespective of the stress direction, and high transparency face materials that cannot be obtained with conventional multilayer boards and honeycomb boards can be obtained. Since no dirt enters the interior, high transparency is maintained only by cleaning the outer surface for a long period of time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a synthetic resin multilayer plate of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Skin layer 2 Wall 3 Hollow chamber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:60

Claims (2)

[Claims] 1. A synthetic resin multi-layer board in which a wall is formed between two upper and lower skin layers, wherein the walls are formed as mutually intersecting walls, and the intersecting wall and the skin layer are interposed. , Each having an independent hollow chamber formed therein. 2. The synthetic resin multilayer plate according to claim 1, wherein the skin layer and the wall are integrated and formed continuously by extrusion molding before curing of the extruded resin.