JPH10231580A - Laminated panel, and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a laminated panel in a relatively compact device in manufacturing the laminated panel comprising hard surface plates applied on both surfaces of foam resin layers. SOLUTION: In a laminated panel manufacturing method, hard surface plates 12 are displeased on both surfaces, having plural foam resin layers 11a-11d between them, and the surface plates 12 and the foam resin layers 11a-11d are jointed with each other. In this case, one layer of the foam resin layer 11a is jointed with the surface layer 12, to form a surface material preliminarily, two of the surface materials are disposed to face the foam resin layers 11a, 11d to each other, the other foam resin layers 11b, 11c are disposed between them, they are heated and pressurized from the outside of the surface members, and the foam resin layers 11a, 11d which are preliminarily jointed with the surface plate 12 and the foam resin layers 11b, 11c between the surface members are formed by this heat, and pressure is also applied in foaming of the foam resin layers 11a-11d, thereby the foam resin layers 11a-11d are jointed with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated panel and a method of manufacturing the same, and more particularly to a lightweight and excellent heat insulating laminated panel which can be used for, for example, interior panels of buildings and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a laminated panel formed by sandwiching a foamed resin material such as styrene foam between two thin metal plates in a sandwich shape is extremely light in structure.
Moreover, since it has excellent heat insulation properties, it is used as various building materials such as wall materials for unit baths.

[0003]

In a conventional laminated panel of this type, one styrofoam plate having a predetermined thickness and size is prepared in advance, and a face plate made of a thin metal plate is provided on both sides with an adhesive or the like. It was formed by bonding. That is,
In such a conventional laminated panel, a styrene foam plate having a predetermined size is prepared in advance, and a face plate is attached to both sides of each styrene foam plate.

[0004] As a result, the productivity is extremely low, and the production cost is inevitably high, which has caused the price of products using such laminated panels to rise. The method currently considered when continuously manufacturing such a laminated panel is to add a blowing agent which decomposes at a specific temperature to generate a gas to the thermoplastic resin, and adds it to a temperature at which the blowing agent decomposes. A method of heating to a temperature of or a method of physically injecting a gas as a high-pressure gas, melting and kneading with an extruder, extruding in the form of a foamed sheet, passing this between, for example, paired metal rolls, cooling, This is a method in which a sheet made of a thin metal plate is simultaneously attached to both sides of the sheet while forming the sheet.

[0005] However, if a metal sheet as a face plate is to be bonded to a foam sheet that is still foaming, the foam sheet is foaming and expands in the thickness direction.
It is very difficult to completely match the surface speed of the foam sheet with the moving speed of the metal plate superimposed thereon. In particular, when used as a building material such as a wall material for heat insulation, the thickness of the foamed sheet is relatively large, so that the sheet surface during foaming exhibits a very complicated behavior.

As a result, even if a face plate is bonded to the surface of the foamed sheet in such a state, the adhesion between the two can be uneven,
There have been problems that the joining strength is remarkably reduced and the flatness is deteriorated. If the metal sheet is continuously bonded to both surfaces after the foaming of the foam sheet is completely completed, the total length of the manufacturing apparatus for that purpose becomes very long, and it is difficult to install it in a factory, for example. This would require a significantly larger footprint.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. When manufacturing a laminated panel in which a hard face plate is bonded to both sides of a foamable resin layer, a relatively small size is required. It is an object of the present invention to provide a laminated panel which can be efficiently manufactured by an apparatus and a method of manufacturing the same.

[0008]

The present invention is a laminated panel, and has the following structure to solve the above-mentioned technical problem. That is, the laminated panel of the present invention is constituted by a hard face plate disposed on both surfaces and a plurality of foamable resin layers sandwiched between the two face plates, and the face plate and the plurality of foamable resin layers. The layers are joined to one another.

The laminated panel according to the present invention comprises the above-mentioned essential components, but is realized even when the following components are further added to the components. With the additional component, a reinforcing sheet is interposed between the face plate and the foamable resin layer on which the face plate is laminated, and the face plate, the reinforcing sheet, and the foamable resin layer are joined to each other. It is characterized by the following. In the invention having the above-mentioned respective features, it is also preferable that at least one of the plurality of foamable resin layers has a different expansion ratio from the other foamable resin layers.

In such a laminated panel, the material of the face plate as a constituent element thereof is a thermoplastic resin such as vinyl chloride, polyethylene, nylon, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, and a mixture thereof. Thermosetting resin such as melamine resin, acrylic resin, epoxy resin, etc.
Other organic materials including veneer and wood, aluminum,
Examples include a steel plate and a metal containing titanium.

The foamable resin layer is preferably made of a material containing polystyrene, polyethylene terephthalate, polycarbonate, polybutylene terephthalate, a cloth impregnated with phenol, and a cloth impregnated with urethane, and the reinforcing sheet has high surface rigidity. It can be formed of a microfoamed or non-foamed plastic material. Glass fibers, inorganic fillers, resin fillers and the like can be added to and mixed with the above-mentioned thermosetting resin materials such as melamine resin, acrylic resin and epoxy resin.

Further, the present invention is a method for manufacturing a laminated panel, and has the following configuration to solve the above-mentioned technical problem. That is, the present invention provides a method for manufacturing a laminated panel in which hard face plates are arranged on both surfaces, a plurality of foamable resin layers are interposed therebetween, and the face plate and the plurality of foamable resin layers are joined to each other. And forming a surface material in advance by bonding the foamable resin layer to the face plate, and arranging the two surface materials so that the foamed resin layer faces each other, and at least one other material therebetween. A step of disposing a foamable resin layer, heating and pressing from the outside of the surface material, and a foamable resin layer previously bonded to the face plate by this heating and a foamable resin layer disposed between the surface materials. During the foaming of the foamable resin layer, by joining and fusing the foamable resin layers to each other with the help of the applied pressure.

In the method for manufacturing a laminated panel according to the present invention, the foamable resin layer pre-joined to the face plate and the foamable resin layer disposed between the surface materials are both pre-foamed. It is also preferable that the foamed layer is a foamed layer, and the foamed resin layer is sandwiched between the two surface materials so that the foamed resin layer is subjected to secondary foaming and joined to each other. In this case, it is preferable to use a polystyrene resin as the foamable resin layer.

In the method for manufacturing a laminated panel according to the present invention, the foamable resin layer pre-joined to the face plate and the foamable resin layer disposed between the surface materials may be a thermosetting foamable resin layer. It is a resin layer, and it is also possible to form a foam by heating the thermosetting foamable resin layer between the two surface materials so as to join them together. In this case, a phenol-impregnated cloth or a urethane-impregnated cloth can be used as the thermosetting foamable resin layer.

Further, according to the method for manufacturing a laminated panel of the present invention, it can be manufactured continuously. That is, the present invention provides a method for manufacturing a laminated panel in which hard face plates are arranged on both surfaces, a plurality of foamable resin layers are interposed therebetween, and the face plate and the plurality of foamable resin layers are joined to each other. In the same manner as the sheet-like face plate wound on a roll, the sheet-like foaming resin layer is unwound, and an adhesive is interposed therebetween to continuously join the sheet-like foam material layers. Is formed, and this is wound around a roll, and the two surface material sheets wound around the respective rolls are fed out in parallel with the foamed resin layer facing each other, and are wound around another roll in the meantime. A process in which a foamable resin sheet is fed out and sandwiched, and heated while being transported while being sandwiched between two endless belts which face each other at an interval and whose mutual interval on the outlet side is larger than that on the inlet side. And a step of foaming a foamable resin layer pre-joined to the face plate and a foamable resin layer disposed between the surface materials by this heating, wherein two steps are performed during the foaming of the foamable resin layer. The foaming resin layers are joined to each other with the help of the clamping force by the endless belt.

In the method for manufacturing a laminated panel according to the present invention, as the surface material, a reinforcing sheet is interposed between the face plate and the foamable resin layer previously bonded to the face plate in a mutually bonded state. It can also be configured. And
When manufacturing a laminated panel by these manufacturing methods, as the face plate, a thermoplastic resin such as vinyl chloride, polyethylene, nylon, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, and a mixture thereof, melamine resin, acrylic resin, epoxy resin,
And other organic materials including veneer and wood, and metals including aluminum, steel plate and titanium. Glass fibers, inorganic fillers, resin fillers and the like can be added to and mixed with the above-mentioned thermosetting resin materials such as melamine resin, acrylic resin and epoxy resin.

Further, as the foamable resin layer, a foamable resin material including polystyrene, polyethylene terephthalate, polycarbonate, polybutylene terephthalate, phenol-impregnated cloth, and urethane-impregnated cloth can be used. A plastic material or the like having high surface rigidity can be used.

According to the laminated panel of the present invention, by forming a plurality of foamable resin layers between the hard face plates arranged on both surfaces, the face plate and one relatively thin foamable resin layer are formed. In advance, a surface material is prepared, and a method of arranging one or more foamable resin layers between the surface materials and bonding them together can be adopted.
Even if it is manufactured continuously, it is possible to obtain a laminated panel having a high bonding strength without occurrence of uneven bonding.

Further, according to the method of manufacturing a laminated panel of the present invention, a foaming resin layer is bonded to a face plate in advance to form a surface material, and the two surface materials are directly or directly interposed between the two surface materials. The surface material is joined during the foaming of the foamable resin layer between the face plates even if a product with a relatively thick foamable resin layer between the face plates is manufactured because the foamable resin layer is sandwiched and joined. Because you can
This type of laminated panel can be manufactured without requiring a large-sized device.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a laminated panel according to the present invention. FIG. 1 schematically shows a laminated panel 10 according to one embodiment of the present invention. This laminated panel 10
Are four foamable resin layers 11a, 11b, 11c, 11
d are laminated and bonded to each other, and a face plate 12 made of a thin metal plate is bonded to both surfaces of a laminated core material C composed of these four foamable resin layers 11a to 11d with an adhesive resin or the like. .

In such a laminated panel 10, the reinforcing sheet 13 can be interposed between each face plate 12 and the surface of the laminated core material C on which it is laminated. Of course, even when the reinforcing sheet 13 is interposed,
Each reinforcing sheet 13 and the outer foamable resin layers 11a and 11d of the face plate 12 and the laminated core C are joined to each other by an adhesive resin or the like.

In such a laminated panel 10, the material of each face plate 12, which is a component thereof, is a thermoplastic resin such as vinyl chloride, polyethylene, nylon, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, and a mixture thereof. Thermosetting resin such as melamine resin, acrylic resin, epoxy resin, etc.
Other organic materials including veneer and wood, aluminum,
Examples include a steel plate and a metal containing titanium. Glass fibers, inorganic fillers, resin fillers and the like can be added to and mixed with the above-mentioned thermosetting resin materials such as melamine resin, acrylic resin and epoxy resin.

Further, as the plurality of foamable resin layers 11a to 11d constituting the laminated core material C, it is preferable to use a foamable resin material including polystyrene, phenol-impregnated cloth, and urethane-impregnated cloth. Can be formed of a plastic material or the like having high surface rigidity. In this laminated panel 10, at least one of the plurality of foamable resin layers 11a to 11d may have a different expansion ratio from the other foamable resin layers.

Next, a method of manufacturing the laminated panel 10 will be described. In the method for manufacturing a laminated panel according to one embodiment of the present invention, first, the surface material 14 is previously formed as shown in FIG. This surface material 14 is the face plate 12
And a primary foamed or unfoamed foamable resin sheet 11a (or 11d).

The surface material 14 is fed out of the metal sheet 12 wound around the roll 20 to form a pair of pressing rollers 2.
1a and 21b, and the unfoamed foamable resin sheet 11a (or 11d) wound around the roll 22 is unreeled and passed between the above-described pressure rollers 21a and 21b so as to overlap the metal sheet 12. Let it.

At this time, an adhesive resin film 15 functioning as an adhesive is provided between the metal sheet 12 and the unfoamed foamable resin sheet 11a (or 11d) by an extractor 23.
From the extraction nozzle 23a. Examples of the material of the adhesive resin film 13 include modified polyolefin, modified vinyl acetate, and nylon.

As described above, the adhesive resin film 15 is interposed between the metal sheet 12 and the non-foamed foamable resin sheet 11a (or 11d) so that a pair of pressure rolls 21 are formed.
a and 21b while heating and pressurizing, the unfoamed foamable resin sheet 11a (or 11
d) strongly adheres to the surface of the metal sheet 12 by the action of the adhesive resin film 15 while foaming. The temperature applied at this time depends on the non-foamed foamable resin sheet 11a (or 1).
1d) is a temperature at which primary foaming does not completely occur and remains in a primary foaming state.

As a result, the foamable resin sheet 11a (or 11d) in the primary foaming state, which is strongly bonded to the surface of the metal sheet 12, retains considerable flexibility, and the surface material 14 formed thereby is wound. It is wound up on a take-up roll 24 and stored. Next, as shown in FIG. 3, the two rolls 24 each wound with the surface material were set at an interval in the vertical direction, and the foamable resin sheets 11 b and 11 c in a primary foamed state were wound up. The roll 25 is set during this time.

Then, from each of the rolls 24 and 25, the surface material 1
4 and the primary foamed resin sheets 11b and 11c are fed out and overlapped with each other, and a pair of pressure-less endless belts 27a and 27b are passed between a pair of guide rollers 26a and 26b.
Is sandwiched between the pair of belts of the molding device 27 including At this time, when the two surface materials 14 wound around the two rolls 24 are unreeled from the rolls, the two rolls 24 are bonded to the primary foamed resin sheet 1 joined to the metal sheet 12.
It is necessary that 1a and 11d are set to face each other.

By the way, the two surface materials 14 unwound from the rolls 24 and 25 and the primary foamed resin sheets 11b and 11c disposed therebetween are formed by guide rollers 26a and
26b, they are superimposed on each other and subsequently sandwiched between a pair of clamping endless belts 27a, 27b.
The endless belt 27a, 2
As is clear from FIG. 3, 7b is arranged so that its interval gradually increases in the feed direction.

A large number of heating rods 28 are arranged and fixed inside the looped endless belts 27a and 27b along and across the surface material contact side belt portion. . The heating rod 28 is heated so as to be temperature-adjustable by a suitable known means.

Accordingly, the two surface members 24 sandwiched between the pair of sandwiching endless belts 27a and 27b and the primary foamed resin sheets 11b and 11c between them are heated by the heating rod 28 during their movement. In response, the primary foamed resin sheets 11a and 11d of the surface material 24 and the primary foamed resin sheets 11b and 11c therebetween have secondary foaming.
Also, hot air of 100 to 200 ° C. can be blown from the heating heat blower 30 to improve the accuracy of foaming and joining.

Each of the primary foamed resin sheets 11a to 11d is
The secondary foam and the pressing force received from the endless belts 27a and 27b are melt-bonded and integrated with each other to form a long laminated panel. Endless belt 27a,
The long laminated panel protruding from between 27b is set to a predetermined thickness by the thickness control belt device 40 as shown in FIG.

The thickness control belt device 40 includes a pair of endless belts 40 facing each other similarly to the molding device 27.
a, 40b, a number of cooling rolls 41 are arranged and fixed inside the loop-shaped endless belts 40a, 40b along and across the surface material contact side belt portion. I have. The thickness of the laminated panel is controlled by such a thickness control belt device 40, and when the laminated panel is cooled to a predetermined temperature at the same time, the laminated panel is cut to a desired length by a cutting device 29 such as a saw (saw blade).

In the method for manufacturing a laminated panel according to the above-described embodiment, the low foam resin sheet 11a (11d) which has been subjected to primary foaming (preliminary foaming) is joined to the face plate 12 to form the surface material 14 in advance. Between one surface material 14
Next foamed (prefoamed) low foamed resin sheet 11b, 1
The first foamed resin sheets 11a to 11d were caused to undergo secondary foaming by being heated by sandwiching 1c therebetween so as to be integrated. In such a case, polystyrene, polyethylene terephthalate, polycarbonate, or the like can be used as the secondary foamed resin material.

In the method for manufacturing a laminated panel according to another embodiment of the present invention, the foamable resin sheet 11a (or 11d) previously bonded to the face plate 12 and the foamable resin sheet Both 11b and 11c may be thermosetting foamable resin sheets.

In this case, by heating the thermosetting foamable resin sheets 11b and 11c between the two surface materials 14, all foams including the unfoamed foamable resin sheets previously bonded to the face plate are heated. Resin sheet 11a-1
1d foams and joins each other. Such a thermosetting foamable resin sheet includes a phenol-impregnated cloth,
It is preferred to use urethane impregnated cloth.

Furthermore, in the method for manufacturing a laminated panel in each of the above-described embodiments, the reinforcing sheet 13 is used as a component of the surface material 14 with the face plate 12 and the foamable resin layer 11a or 1a.
1d, the reinforcing sheet 13 is attached to the face plate 12 in a separate process in advance, or the reinforcing sheet 13 and the face plate 12 fed out from the rolls 20 and 22 in the facing material forming apparatus shown in FIG. Resin layer 11a (or 1)
During 1d), the reinforcing sheet 13 can be simultaneously and continuously inserted.

In this case, the adhesive resin film 15 functioning as an adhesive is provided between the face plate 12 and the foamable resin layer 11a (or 11d) on both sides of the reinforcing sheet 13.
It is needless to say that it is necessary to arrange Of course, an adhesive may be applied to both sides of the reinforcing sheet 13 in advance, or the adhesive resin film 15 may be bonded in a laminated state in advance.

FIG. 4 shows another surface material forming apparatus different from FIG. 2 for forming the surface material 14 in the method for manufacturing a laminated panel of the present invention. In the surface material forming apparatus shown in FIG. 4, while the face plate 12 wound around the roll 20 is being unwound, the face plate 12 is brought into contact with the rotating adhesive application roller 50, and the unfoamed or 1 The foamed resin sheet 11a (or 11d) in the next foamed state is fed out from the roll 22, and a pair of pressing rollers 51a,
1b, is superimposed on the face plate 12 on the side where the adhesive is applied,
Next, it is dried by a dryer 52, wound up by a take-up roll 24, and stored. Thereafter, a laminated panel is formed as described with reference to FIG.

The adhesive application roller 50 is installed so that its lower part is immersed in the liquid adhesive 54 contained in the container 53, and rotates in the direction opposite to the moving direction of the face plate 12 as indicated by an arrow 55. Have been allowed. Liquid adhesive 54
When using such an apparatus for applying to the face plate 12,
As the adhesive 54, for example, an epoxy resin, a urethane resin, an acrylic resin, or the like can be used.

When the above-described laminated panel 10 is used as a building material, the metal material, synthetic resin material, or natural material used as the face plate 12 is formed with a thickness as shown in the following table. Is preferred.

[Table 1]

[0043]

[Table 2]

[0044]

[Table 3]

[0045]

As described above, according to the laminated panel of the present invention, by forming a plurality of foamable resin layers between the hard face plates disposed on both surfaces, the laminate panel can be relatively compared with the face plate. A surface material is prepared by laminating a thin foaming resin layer in advance, and one or more foaming resin layers are further arranged between two surface materials or between the surface materials to mutually Since the bonding method can be adopted, even if it is manufactured continuously, there is no occurrence of uneven bonding between the panels, and a laminated panel having high bonding strength can be obtained.

Further, according to the method of manufacturing a laminated panel according to the present invention, a foaming resin layer is bonded to a face plate in advance to form a surface material, and one or more foaming resin layers are sandwiched between two face plates. Even when manufacturing a product in which the foamable resin layer between the face plates is relatively thick,
Since the face plates can be joined during the foaming of the foamable resin layer between the face plates, this type of laminated panel can be manufactured without requiring a large-sized device.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a laminated panel according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing a state in which surface materials are continuously formed in the method for manufacturing a laminated panel according to one embodiment of the present invention.

FIG. 3 illustrates a method for manufacturing a laminated panel according to an embodiment of the present invention, in which a surface material formed by the method shown in FIG.
It is sectional drawing which shows roughly the process of making a foaming resin sheet and carrying out secondary foaming, and manufacturing a laminated panel continuously.

FIG. 4 is a cross-sectional view schematically showing a continuous formation process of a surface material in a method of manufacturing a laminated panel according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Laminated panel 11a Foamable resin layer 11b Foamable resin layer 11c Foamable resin layer 11d Foamable resin layer 12 Face plate (metal sheet) 13 Reinforcement sheet 14 Surface material 15 Adhesive resin film 20 Roll 21a Nipping roller 21b Nipping roller Reference Signs List 22 Roll 23 Extractor 23a Extraction nozzle 24 Take-up roll 25 Roller 26a Guide roller 26b Guide roller 27 Forming device 27a Endless belt 27b Endless belt 28 Heating rod 29 Saw (saw blade) 30 Heating heat blower 40 Thickness control belt device 40a Endless Belt 40b Endless belt 41 Cooling roll 50 Adhesive coating roller 51a Press roller 51b Press roller 52 Dryer 53 Container 54 Liquid adhesive

Claims (12)

[Claims] 1. A hard face plate disposed on both surfaces and a plurality of foamable resin layers sandwiched between two face plates, wherein the face plate and the plurality of foamable resin layers are mutually A laminated panel characterized by being joined. 2. A reinforcing sheet is interposed between the face plate and the foamable resin layer on which the face plate is laminated, and the face plate, the reinforcing sheet, and the foamable resin layer are joined to each other. The laminated panel according to claim 1, wherein 3. The laminated panel according to claim 1, wherein at least one of the plurality of foamable resin layers has a different expansion ratio from the other foamable resin layers. 4. The face plate is formed of a sheet formed of any one of a thermoplastic resin, an organic material including a veneer and wood, and a metal formed of aluminum, a steel plate and a metal including titanium, and the foamable resin layer is formed of polystyrene. 4. The reinforcing sheet is made of a foamable resin material including polycarbonate, polyethylene, polybutylene terephthalate, phenol-impregnated cloth, and urethane-impregnated cloth, and the reinforcing sheet is formed of a plastic material having high surface rigidity. 3. The laminated panel according to item 1. 5. A method for producing a laminated panel in which a hard face plate is disposed on both surfaces, a plurality of foamable resin layers are sandwiched between the hard face plates, and the face plate and the plurality of foamable resin layers are joined to each other. A step of bonding the foamable resin layer to the face plate to form a surface material in advance; and arranging the two surface materials so that the foamed resin layer faces each other, and at least one other member therebetween. A step of disposing a foamable resin layer, heating and pressing from the outside of the surface material, and a foamable resin layer previously bonded to the face plate by the heating and a foamable resin layer disposed between the surface materials. And a step of bonding the foamable resin layers to each other with the help of the applied pressure during the foaming of the foamable resin layer. 6. The foamable resin layer which is disposed between the foamable resin layer previously bonded to the face plate and the surface material,
The low-foaming layer which has been pre-foamed together, and is formed by secondary foaming by heating with the foamable resin layer sandwiched between the two surface materials, and is joined to each other. Of manufacturing a laminated panel. 7. The method according to claim 6, wherein the foamable resin layer is made of a polystyrene resin, polyethylene terephthalate, polybutylene terephthalate, or polycarbonate. 8. The foamable resin layer pre-joined to the face plate and the foamable resin layer disposed between the surface material,
Both are thermosetting foamable resin layers, and are foamed by heating with the thermosetting foamable resin layer sandwiched between the two surface materials to be joined to each other. 6. The method for producing a laminated panel according to 5. 9. The method according to claim 8, wherein the thermosetting foamable resin layer comprises a phenol-impregnated cloth and a urethane-impregnated cloth. 10. A method of manufacturing a laminated panel in which a hard face plate is disposed on both surfaces, a plurality of foamable resin layers are interposed therebetween, and the face plate and the plurality of foamable resin layers are joined to each other. Along with the sheet-like foaming resin layer being unwound similarly to the sheet-like face plate wound on a roll, an adhesive is interposed therebetween to continuously join the sheet-like foaming material to form a sheet-like surface material. Forming and winding this on a roll, and feeding the two surface material sheets wound on the rolls in parallel with the foamed resin layer facing each other, and while the foaming resin layer is wound on another roll, Feeding and sandwiching the conductive resin sheet, and heating while transporting while sandwiching the two endless belts, which are opposed to each other at an interval and the mutual interval on the outlet side is set to be larger than that on the inlet side. Foaming a foamable resin layer pre-joined to the face plate and a foamable resin layer disposed between the surface materials by the heating, wherein the foaming resin layer has two endless foams during the foaming. A method for manufacturing a laminated panel, comprising joining these foamable resin layers to each other with the help of a clamping force by a belt. 11. The surface material, wherein a reinforcing sheet is interposed between the face plate and the foamable resin layer pre-joined thereto in a joined state.
The method for producing a laminated panel according to any one of 6, 8, and 10. 12. The thermosetting resin such as a thermoplastic resin such as vinyl chloride, polyethylene, nylon, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, and a mixture thereof, a melamine resin, an acrylic resin, and an epoxy resin; This thermosetting resin is composed of a material formed by adding and mixing glass fiber, inorganic filler, resin filler, etc., an organic material including veneer and wood, or a sheet formed of aluminum, steel plate and metal including titanium. Further, the foamable resin layer is formed of any of materials including polystyrene, polyethylene terephthalate, polycarbonate, polybutylene terephthalate, a phenol-impregnated cloth, or a urethane-impregnated cloth, and further, the reinforcing sheet is a fine foam having a high surface rigidity. There The laminated panel according to claim 11, wherein the laminated panel is formed of a non-foamed plastic material or the like.