JP3159903B2 - Terminal treatment method for laminates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a laminated board having a board made of a thermoplastic synthetic resin and a skin layer adhered to one side of the board.

[0002]

2. Description of the Related Art Conventionally, laminated boards of the above type used for interior boards for vehicles and buildings, exterior boards for household tools, insoles, artificial turf, etc. have hitherto been produced by simply hitting the end thereof with a sharp cutting edge. It was used as it was pulled out or covered with a U-shaped rim on the terminal to cover the cut surface. The terminal of such a laminated board is unsatisfactory in appearance, and is not preferable except when it is laid in a frame. Also, when the synthetic resin board is made of a thin hard sheet, the cutting edge is sharp and may be deformed by the pressure of the blade, causing burrs on the cutting edge. I had to pay.

In order to correct such a drawback, the applicant of the present application has proposed a method of treating a laminated board terminal disclosed in Japanese Patent Application Laid-Open No. Hei 6-305062. According to this method, the terminals of the laminated board can be processed with a simple operation, and the appearance can be excellent, but since the cross section of the terminal is an arc shape, when the laminated boards are arranged side by side. However, there is a problem that the design is somewhat inferior in design, such as the fact that the joint is no longer bent.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for treating a laminated board, which eliminates the above-mentioned conventional disadvantages.

[0005]

[0006]

[0007]

In order to achieve the above object, the present invention provides a laminate having a thermoplastic synthetic resin board and a skin layer adhered to one surface of the board. After being fixed on the table so that the skin layer is in contact with the upper surface of the table and the end of the laminated plate is protruded from the side edge of the table by a predetermined width, the blade is disposed above the side edge of the table. By gradually lowering the hot blade having a blade apex angle of 60 to 90 ° to soften and melt the thermoplastic synthetic resin board portion around the hot blade, and then retreat the hot blade upward, Raise the vertical slide member provided adjacent to the side edge, bend the end of the laminated board that protrudes from the table, and change the thermoplastic synthetic resin board part of the end to the other laminated board body part. For thermoplastic synthetic resin boards Suggest terminal processing method of a laminated plate, characterized in that to wear.

Further, in order to achieve the above object, the present invention provides a laminate having a thermoplastic synthetic resin board and a skin layer adhered to one side of the board, wherein the skin layer is a table top. The edge of the laminate is fixed on the table so that the edge of the laminate protrudes from the side edge of the table by a predetermined width, and then the blade is disposed above the side edge of the table. The hot blade having an angle of 60 to 90 ° is gradually lowered to soften and melt the thermoplastic synthetic resin board portion around the hot blade. Then, the hot blade is retracted upward, and the hot blade is adjacent to the side edge of the table. After raising the upper and lower slide members provided by the thickness of the laminated plate from the table upper surface and bending the end of the laminated plate protruding from the table, the horizontal slide member provided on the upper surface of the upper and lower slide members, Other than the end It is moved to the layer plate main body side, and the protrusion of the end protruding above the upper surface of the vertical slide member is bent toward the back side of the laminated plate main body, and the thermoplastic synthetic resin board portion of the end is bent. Is fused to a thermoplastic synthetic resin board portion of a laminate body portion, and a method for treating a laminate terminal is proposed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing an example of the laminated plate 1, and FIG. 2 is an external perspective view thereof. In the laminated plate 1 shown here, a thermoplastic synthetic resin flat sheet 12 is integrally bonded to the bottom surface side of the concave portion 17 of the thermoplastic synthetic resin embossed sheet 11 in which a large number of cylindrical small concave portions 17 are formed. It has a board 13 made of thermoplastic synthetic resin, and a skin layer 14 made of, for example, a nonwoven fabric sheet, which is adhered to the outer surface of the flat sheet 12 on one side of the board 13.

FIG. 3 is a sectional view of an essential part showing an example of an apparatus for performing the above-described terminal processing of the laminated board 1, and shows a stage at which the terminal processing is started. In this terminal processing method, first, the laminated board 1 is set to a predetermined width from the side edge 21 extending in the vertical direction of the table 2 so that the skin layer 14 is in contact with the upper surface of the table 2 and the end 18 of the laminated board 1 It is placed on the table 2 so as to protrude. Next, the laminated board 1 is fixed on the table 2 by pressing it with the pressing plate 6 from the back side, that is, the side opposite to the side on which the skin layer 14 is provided.

On the other hand, an upper and lower slide member 4 is disposed adjacent to the side edge 21 of the table 2, and when the slide member 4 is at the standby position shown in FIG. It is in the same state. At this time, the laminated board main body 1A other than the end 18 of the laminated board 1 is
The end portion 18 of the laminated plate 1 which is placed on the upper surface of the slide plate 1 and protrudes from the table 2 is placed on the upper surface of the vertical slide member 4. The vertical slide member 4 is located near the side edge 21 of the table 2, and as shown in FIG.
It is preferable that it is positioned in contact with

Next, the hot blade 3 arranged so that the cutting edge 31 is located above the side edge 21 of the table 2, in the example shown in FIG. To gradually soften and melt the thermoplastic synthetic resin board portion of the laminate 1 from the portion where the cutting edge 31 is in contact. At this time, the end 18 of the laminate 1 and the laminate main body 1A are not completely separated. In this example, the thermoplastic synthetic resin board 13 is melted by the hot blades 3 so that the laminate main body 1 </ b> A and the end 18 are connected via the skin layer 14. That is, as shown in FIG. 4, the hot blade 3 is lowered until the cutting edge 31 reaches the skin layer 14,
Is not cut off. After that, the hot blade 3 is immediately raised and retracted above the laminate 1.

In this way, the thermoplastic synthetic resin board portion around the hot blade is softened and melted, and then the hot blade 3 is retracted upward. As described later, the apex angle of the blade of the hot blade 3 is set to 60 to 90 °.

When the hot blade 3 is retracted, the vertical slide member 4 provided adjacent to the side edge 21 of the table 2 is moved to the cylinder 4
5, the end 18 of the laminated board 1 protruding from the table 2 is moved 90 ° around the skin layer 14 side of the laminated board 1 as shown in FIG. Then, the thermoplastic synthetic resin board portion at the end 18 is fused to the thermoplastic synthetic resin board portion of the other laminated board body 1A. In this way, the melted portions of both the end portion 18 of the laminate 1 and the laminate body 1A are joined, and after the melted portion is cooled, it is taken out of the device, and as shown in FIG. The laminate 1 covered with the skin layer 14 is obtained. Vertical slide member 4
Is returned to the standby position shown in FIG. 3 again. Thus, the terminal treatment of the laminated board 1 is completed. With such a simple operation, the terminal can be covered with the skin layer 14, and a good-looking terminal structure can be obtained.

The terminal structure of the laminate 1 having the thermoplastic synthetic resin board 13 and the skin layer 14 adhered to one side of the board 13 obtained by such a processing method is shown in FIG. As can be seen from the figure, the end 18 of the laminate 1 is centered on the side of the skin layer 14, that is, its bent portion 91.
Is bent to the side of the laminated board main body 1A other than the end 18 with the base end as the base end, and the thermoplastic synthetic resin board portion of the end 18 and the thermoplastic synthetic resin board of the laminated board main body 1A The parts are fused together.

The terminal structure of the laminated plate has a good appearance because the terminal is covered with the skin layer 14, and can prevent the burr from being exposed. By arranging such laminated boards 1 side by side, the terminals have a sharp edge, and the appearance is significantly improved. In particular, as in the example shown in FIG. 6, the terminal is finished such that the outer surface 93 of the skin layer of the bent end portion 18 and the outer surface of the skin layer of the laminated board main body 1A make an angle of about 90 °. In particular, the appearance can be effectively improved, and the appearance when the laminated boards 1 are arranged side by side can be further improved.

In this embodiment, as shown in FIG. 3, the width of the end portion 18 of the laminated plate 1 protruding from the side edge 21 of the table 2 is made substantially equal to the thickness of the laminated plate 1. The upper end edge of the end 18 after the terminal treatment and the back surface of the laminated board main body 1A (the surface opposite to the side on which the skin layer 14 is provided) are flush with each other. However, in this case, when the softening and melting state of the thermoplastic synthetic resin board 13 changes due to the temperature of the hot blade 3 or its descending speed, or when the skin layer 14 contains a cushion material, the laminated board Since the diameter of the arc of the bent portion 91 (FIG. 6) between the main body 1A and the end 18 may fluctuate,
In order to make the edge of the bent end 18 coincide with the back surface of the laminated board main body 1A, the table 2 of the end 18 is tested by trial.
It is necessary to adjust the width of the protruding portion from the side edge 21. For this reason, the operation at the time of terminal processing may become somewhat complicated.

FIG. 7 is a cross-sectional view of an apparatus for processing a terminal of a laminated board which can also eliminate the above-mentioned problems. The processing method using this apparatus is a step of retracting the hot blade 3 upward except that the width of the end portion 18 of the laminate 1 protruding from the side edge 21 of the table 2 is slightly larger than in the above-described processing method. Up to this point, there is no difference from the above method.

That is, the laminated plate 1 shown in FIG.
As shown in FIG. 3, the skin layer 14 is fixed to the table 2 so that the skin layer 14 is in contact with the upper surface of the table 2 and the end portion 18 of the laminate 1 protrudes from the side edge 21 of the table by a predetermined width. 18 is placed on the upper surface of the upper and lower slide members 4 flush with the upper surface of the table, and is arranged above the side edge 21 of the table 2, preferably such that the cutting edge is located directly above the upper edge. The hot blade 3 of 60 to 90 ° is gradually lowered to soften and melt the thermoplastic synthetic resin portion around the hot blade, and then the hot blade 3 is retracted upward. FIG. 7 shows a state before the hot blade 3 is retracted upward. The hot blade 3 is retracted as shown in FIG. At the same time, the vertical slide member 4 provided adjacent to the side edge 21 of the table 2 is raised from the upper surface of the table 2 by the thickness of the laminate 1 as shown in FIG.

The upper and lower slide members 4 arranged in contact with the side edges 21 of the table 2 have their upper surfaces flush with the upper surface of the table 2 when in the standby position shown in FIG. The vertical slide member 4 is raised by the thickness of the laminated plate 1, and the end 18 of the laminated plate 1 protruding from the table 2 is bent. At this time, the width of the end portion 18 protruding from the side edge 21 of the table 2 is set to be slightly longer than the thickness of the laminate. Therefore, the upper end edge of the bent end 18 protrudes slightly above the back surface of the laminated board main body 1 </ b> A other than the end and the upper surface of the vertical slide member 4. The portion thus protruded, ie, end 1
8 is denoted by reference numeral 19 in FIG.

After bending the end portion 18 as described above,
As shown in FIG. 8, the horizontal slide member 5 provided on the upper surface of the upper and lower slide members 4 is moved to a side of the laminated board main body 1 A other than the end 18 by a pressing means (not shown),
As shown in FIG. 9, the protruding portion 19 of the end portion 18 protruding from the upper surface of the upper and lower slide member 4 is bent again to the back surface side of the laminated board main body 1A, and the thermoplastic synthetic resin board of the end portion 18 is formed. The portion is fused to the thermoplastic synthetic resin board portion of the laminate body 1A. In this way, the laminated board 1 in which the terminal is wound by the skin layer 14 as shown in FIG. 10 is obtained.

FIG. 10 also shows the terminal structure of the laminate 1 having the thermoplastic synthetic resin board 13 and the skin layer 14 adhered to one side of the board obtained by this processing method. As such, the end 18 of the laminate is
Is bent to the side of the laminate body 1A other than the end, and a thermoplastic synthetic resin board part of the end 18 and a thermoplastic synthetic resin board of the laminate body 1A. Are fused to each other, and the outer surface 93 of the skin layer of the bent end portion 18 and the outer surface of the skin layer of the laminate body 1A form an angle of about 90 °. This provides the same advantages as the terminal processing structure obtained in the above-described embodiment.

In addition, in the case of this embodiment, due to the movement of the horizontal slide member 5, the portion of the skin layer 14 of the projecting portion 19 projecting above the upper surface of the upper and lower slide member 4 becomes the rear surface of the laminated plate main body 1A. Since the terminal is further folded so as to be flush with the terminal, the terminal is more beautifully finished. Not only the outer surface 93 of the terminal but also the skin layer 1 on the back side
4, and the appearance of the terminal can be further enhanced. Further, since the projection 19 of the end 18 is pushed downward by the movement of the horizontal slide member 5 toward the table 2, the first bent portion 91, that is, the surface of the laminated board main body 1 A and the outside of the end 18. The diameter of the arc of the bent portion 91 between the surface 93 and the surface 93 becomes smaller. The radius of curvature of the terminal corner can be made smaller. Moreover, the protrusion 19
A second bent portion 92 which is a bent portion of
Since the outer surface 93 of the end portion 18 between the bent portion 91 and the bent portion 91 becomes a wide flat surface, a terminal having a more sharp edge can be obtained.

FIG. 11 shows a cross section of the hot blade 3 used in each of the above embodiments.
When the thermoplastic synthetic resin board of the laminate is melted, the heating means (not shown) is used to determine the temperature of the thermoplastic synthetic resin board within the range of 150 to 250 ° C. according to the material and thickness of each sheet. It is kept at a predetermined temperature. The apex angle α of the cutting edge 31 is 60 to 90 as described above.
Is suitable, but it is particularly preferable to be 65-85 °. When the apex angle exceeds 90 °, when the end portion 18 of the laminate 1 is bent, a gap is formed between the laminate main portion 1A and the end portion 18, and these may not be able to be brought into sufficient contact. . When the apex angle α is less than 60 °, the unsoftened portions are also pressed together, and in any case, the fusion strength is reduced.

In the case of the second embodiment in which the bending process is performed twice, the protrusion 19 projecting above the upper surface of the upper and lower slide members 4 also needs to be sufficiently softened. It is preferable that the angle β of the cutting edge 31 on the end 18 side of the apex angle α be larger than the other angle γ. When the apex angle α is 80 °, the angle β is 75 to 55 ° and the angle γ is Preferably, it is 5 to 25 °. If the angle of separation β exceeds 75 °,
However, since the area in contact with the end portion 18 of the laminate 1 becomes too large and the end portion 18 is hardly melted, the lowering speed must be slowed down, and the processing time becomes long. On the other hand, when the angle β is less than 55 °, the thermoplastic synthetic resin board portion at the end 18 may not be sufficiently softened.

As shown in FIGS. 1 and 2, the laminated board 1 used in each of the above embodiments has a thickness of, for example, 0.5 mm.
A thermoplastic synthetic resin sheet having a thickness of, for example, 0.3 to 1.5 mm is formed on the bottom side of the concave portion 17 of the embossed sheet 11 in which a large number of small concave portions 17 are formed by thermoforming from a thermoplastic synthetic resin sheet having a thickness of about 1.5 mm. The flat sheet 12 is integrally adhered to produce a thermoplastic synthetic resin board 13, and the outer surface of the flat sheet 12 is covered with, for example, a non-woven fabric, a napped cloth, a synthetic resin film or the like, or a cushion on those skins. A skin layer 14 made of a material backed is adhered.
FIG. 12 shows an example in which a skin layer 14 made of a cushion material 16 made of a polyethylene foam sheet and a nonwoven fabric sheet 15 is used.

The small recess 17 is a generally cylindrical recess having a diameter of, for example, 3-7 mm and a depth of, for example, 2-10.
mm. Therefore, the total thickness of the thermoplastic synthetic resin board 13 is about 3 to 10 mm. Small recess 17
Are arranged in a staggered or grid pattern.

Instead of forming the concave portion 17 into a cylindrical shape, the concave portion 17 may be formed into an appropriate shape such as a truncated cone, a cone, a prism, or a pyramid.

A laminated plate in which a flat sheet is adhered to the side face of the concave opening of the embossed sheet 11 can be used in the same manner. In this case, a large number of sealed hollow chambers are formed. Further, a skin layer 1 is provided on the outer surface of the flat sheet on one side of the thermoplastic synthetic resin board in which flat sheets are integrally bonded to both sides of the embossed sheet 11 on both sides of the concave opening side and the concave bottom surface.
4 can also be used. Needless to say, the skin layer 14 may be bonded to the other flat sheet. Such a board made of a thermoplastic synthetic resin is a preferable material because it is lightweight, has high compressive strength and bending strength, and has a small difference in strength in the vertical and horizontal directions.

In this way, a thermoplastic synthetic resin flat sheet is integrally bonded to at least one of the bottom surface of the concave portion and the open side surface of the concave portion of the thermoplastic synthetic resin embossed sheet in which a large number of small concave portions are formed. Any type of laminated board having a resin board and a skin layer adhered to the outer surface of a flat sheet on one side of the thermoplastic synthetic resin board can be used.

The thermoplastic synthetic resin used for the embossed sheet 11 and the flat sheet 12 constituting the thermoplastic synthetic resin board 13 is most preferably a polyolefin-based material, and the skin layer 14 is made of fibers made of the same material. If selected, the laminates 1 can all be integrated by fusion. Polypropylene is used for hard thermoplastic synthetic resin boards, and ethylene-vinyl acetate copolymer or olefin-based thermoplastic elastomer is used for soft thermoplastic boards.

The laminate 1 shown in FIG. 13 can also be used. The thermoplastic synthetic resin board 13 of the laminate 1 shown here has the same shape as that known as corrugated paper. The thermoplastic synthetic resin embossed sheet 11 in which the corrugated concave portions 17 are formed has flat sheets 12, 12 of thermoplastic synthetic resin adhered to both sides of the embossed sheet 11. A skin layer 14 is provided on one surface side of the thermoplastic synthetic resin board 13.
Is adhered, and the laminated board 1 is constituted. The shape of the concave portion 17 is not limited to a waveform, and may be a square. The thermoplastic synthetic resin board 13 is also a preferable material because it is lightweight and has high compressive strength and bending strength. However, since a slight difference in strength depending on the direction is recognized, it is necessary to consider the direction when removing the material.

Further, the thermoplastic synthetic resin board of the laminate used in the present invention is not limited to a flat sheet adhered to one side or both sides of an embossed sheet, and a honeycomb structure made of synthetic resin is used. Various materials called a honeycomb core, a honeycomb cushioning material and the like can also be used. Examples are shown below.

The thermoplastic synthetic resin board 13 shown in FIG. 14 has another embossed sheet on one side of the thermoplastic synthetic resin board shown in FIG. The sheet and the flat sheet are overlapped, eliminating the difference in strength depending on the direction. The skin layer 1 is provided on one surface side of the thermoplastic synthetic resin board 13.
The laminated plate 1 is formed by adhering 4.

The thermoplastic synthetic resin board 13 shown in FIG. 15 is obtained by welding two sheets of thermoplastic synthetic resin having a number of parallel ridges erected on the surface thereof at the top of the ridges. In this example, the directions of the ridges of both plates intersect. Such a board 13 made of thermoplastic synthetic resin
The skin layer 14 is adhered to one side of the laminate 1 to constitute the laminate 1.

The thermoplastic synthetic resin board 13 shown in FIG. 16 is composed of two thermoplastic synthetic resin plates having a large number of parallel ridges erected on the surface, and the directions of the ridges coincide with each other. As described above, although they are welded to each other at the tops, they may be integrally formed, or may be formed by bonding a square pipe or a round pipe made of thermoplastic synthetic resin between two flat sheets. The skin layer 14 is adhered to one surface side of the board 13 made of the thermoplastic synthetic resin to constitute the laminate 1.

A thermoplastic synthetic resin board 13 shown in FIG. 17 has a thin thermoplastic synthetic resin non-foamed sheet adhered to the upper and lower surfaces of a highly foamed thermoplastic synthetic resin sheet. An integrated foam sheet having a skin layer formed on the lower surface can also be used. Further, the thermoplastic synthetic resin board 13 shown in FIG. 18 is a hollow plate in which the upper and lower surfaces are pulled to form a large number of diaphragms when the intermediate layer of the foamed sheet is in a molten state. Also on the board 13 made of thermoplastic synthetic resin, a skin layer 14 is adhered to one side of the board 13 to form the laminated board 1.

[0039]

According to the terminal treatment method for a laminated board according to the first aspect, the terminal can be covered with the skin layer by a simple operation, and a good-looking terminal structure can be obtained.

According to the method for processing a laminated board according to the second aspect of the present invention, the radius of curvature of the corner of the terminal can be further reduced, so that the terminal having a good appearance and a sharp edge can be obtained.

[0041]

[0042]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a laminate used in the present invention.

FIG. 2 is a perspective view of the laminate shown in FIG.

FIG. 3 is a fragmentary cross-sectional view showing an example of an apparatus for performing terminal processing according to the present invention, and shows a start stage of terminal processing.

FIG. 4 is a cross-sectional view of a main part of the device, showing a state where the hot blade is lowered from the state of FIG. 3, and shows an intermediate stage of terminal processing.

5 is a cross-sectional view of a main part of the device, showing a state where the hot blade is retracted upward from the state of FIG. 4 and the vertical slide member is raised, and shows a final stage of the terminal processing.

FIG. 6 is a cross-sectional view showing an example of a laminated board subjected to terminal treatment in the order of FIGS. 3 to 5;

FIG. 7 is a cross-sectional view of a main part of another example of an apparatus for performing terminal processing, showing an intermediate stage of terminal processing in a state where a hot blade is lowered.

8 is a cross-sectional view of a main part of the device, showing a state where the hot blade is retracted upward from the state of FIG. 7 and the vertical slide member is raised.

9 is a cross-sectional view of a main part of the device, showing a state where the horizontal slide member has been moved from the state of FIG. 8, and shows a final stage of the terminal processing.

FIG. 10 is a cross-sectional view illustrating an example of a laminated plate that has been subjected to terminal treatment in the order of FIGS. 7 to 9;

FIG. 11 is a sectional view of a hot blade.

FIG. 12 is a cross-sectional view showing another example of a terminal-processed laminate.

FIG. 13 is a perspective view showing another example of a laminate having a thermoplastic synthetic resin board in which flat sheets are adhered to both sides of an embossed sheet.

FIG. 14 is a perspective view of a laminate having another thermoplastic synthetic resin board.

FIG. 15 is a perspective view of a laminate having yet another thermoplastic synthetic resin board.

FIG. 16 is a perspective view of a laminate having yet another thermoplastic synthetic resin board.

FIG. 17 is a perspective view of a laminate having yet another thermoplastic synthetic resin board.

FIG. 18 is a perspective view of a laminate having still another thermoplastic synthetic resin board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Laminate board 1A Laminate board main body 2 Table 3 Hot blade 4 Vertical slide member 5 Horizontal slide member 13 Thermoplastic synthetic resin board 14 Skin layer 18 End part 19 Protrusion 21 Side edge 31 Cutting edge 93 Outer surface α Apex angle

Claims (2)

(57) [Claims] 1. A laminate having a thermoplastic synthetic resin board and a skin layer attached to one side of the board ,
Make sure that the skin layer is in contact with the table top
Edge of the table so that it protrudes from the side edge of the table by a predetermined width.
After fixing on the table, the cutting edge is above the side edge of the table
And the apex angle of the blade is 60-90 °
Gradually lower the hot blades of the thermoplastic synthetic tree around the hot blades.
Soften and melt the fat board part, then retract the hot blade upward
And the top and bottom provided adjacent to the side edge of the table
Raise the slide member and stack it out of the table
By bending the ends of the plate, the thermoplastic synthetic resin board portion of this end portion, laminate, wherein Rukoto fused to other thermoplastic synthetic resin board portion of the laminate body of the Terminal processing method . 2. A board made of a thermoplastic synthetic resin, and said board
A laminate having a skin layer attached to one surface side of
Make sure that the skin layer is in contact with the table top
Edge of the table so that it protrudes from the side edge of the table by a predetermined width.
After fixing on the table, the cutting edge is above the side edge of the table
And the apex angle of the blade is 60-90 °
Gradually lower the hot blades of the thermoplastic synthetic tree around the hot blades.
Soften and melt the fat board part, then retract the hot blade upward
And the top and bottom provided adjacent to the side edge of the table
Slide member from the table top by the thickness of the laminate
Raise it and fold the end of the laminate that protrudes from the table.
After bending, the horizontal slide provided on the upper surface of the vertical slide member
Move the ride member to the side of the laminate body other than the end
Before projecting above the upper surface of the vertical slide member
Bend the protrusion at the end to the back side of the laminate body,
The thermoplastic synthetic resin board portion at the end is attached to the laminated board body portion.
Specially bonded to a thermoplastic synthetic resin board part.
A method of treating a laminated board.