JPH07207829A - Lightweight panel for building - Google Patents

Abstract

PURPOSE:To provide a building panel that is lightweight while being strong in compressive strength and producible at low cost. CONSTITUTION:A corrugated board sheet 3 is made up by sticking linerboards 2 to both sides of a corrugated medium 1 that is processed to bear corrugations and chevrons, and a plurality of such corrugated board sheets are stuck together so that the corrugations and chevrons can be arranged in the same direction Then, panels 5 are made with cutting applied in the direction showing a section in which the corrugations and chevrons are visible, and plied paper 7, with a decorative sheet 6 stuck thereto, is stuck at least to one side of each of the panels 5 so that the decorative sheet 6 comes to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel for building materials, and more particularly to a lightweight building material panel suitably used for interior doors, door end plates (face materials), ceiling materials and the like.

[0002]

2. Description of the Related Art Conventionally, as a lightweight building material panel of this type, an upper surface of a core material layer made of corrugated board formed by laminating and adhering a plurality of corrugated sheets having mutually adjacent corrugated sheets with the corrugations of adjacent sheets orthogonal to each other. On the lower part of the core material layer, paper is laminated and bonded on the front and back sides, and the bonded metal foil is fixed on the lower part of the core layer. Ceiling material
3536), or a composite flooring material in which a honeycomb structure is used as a core material, frame materials are arranged on the four circumferences of the core material, and thin plate materials are integrally adhered to both front and back surfaces (Actual development Shokai). 57
-198231).

[0003]

The former ceiling material described in the prior art is one in which a plurality of corrugated cardboard sheets are made orthogonal to each other, but the warpage and the compression strength are insufficient. In addition, the latter composite flooring material uses an expensive honeycomb structure, which has improved compressive strength but is expensive, and therefore the disadvantage that the surface material is difficult to bond and the productivity is poor has not been solved. It was

The present invention has been made in view of the above problems, and an object thereof is to achieve light weight (specific gravity 0.3 to 0.6, preferably 0.4 to
0.5), to provide a building material panel having compressive strength and low manufacturing cost.

[0005]

In order to achieve the above object, in the lightweight building material panel of the present invention, a corrugated cardboard base paper such as liner paper is stuck on both sides of a corrugated or chevron-shaped core. The above-mentioned decorative sheet is formed by laminating a plurality of corrugated cardboard sheets so that the corrugations or chevrons are in the same direction, and cutting the panel so that the corrugations or chevrons can be seen in the cross section, at least one surface of which the decorative sheet is pasted. The feature is that they are attached so that they face outward.

The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a manufacturing process of a lightweight building material panel of the present invention. To explain from the top of FIG. 1, a plurality of corrugated cardboard sheets 3 having corrugated cores 1 sandwiched between corrugated cardboard base papers 2 on both sides of the corrugated core 1 are laminated so that the corrugations are in the same direction. Panel 5 (cutting width is 0.5
It is generally about cm to 20 cm. ) The light-weight building material panel 8 of the present invention is prepared by laminating the interleaving paper 7 to which the decorative sheet 6 is attached so that the decorative sheet 6 faces outward.
Is manufactured.

As the core 1, a core raw paper used for general corrugated board is processed into a corrugated shape or a chevron shape by a corrugating machine. Depending on the thickness, A
Although there are steps, B steps, E steps, etc., an appropriate one is used for each corrugated board sheet. If necessary, the core raw paper may be flame-retarded with an organic phosphoric acid-based flame retardant, and may be treated with paraffin, vinylidene chloride, or vinyl chloride for the purpose of improving water resistance, or strengthened. As the above, an emulsion, a urea resin, a melamine resin, or the like may be impregnated and cured, and further, antifungal treatment including an adhesive may be performed. As the cardboard base paper (liner) 2,
Various liner papers, kraft papers, coated cardboards and the like generally used for corrugated board, which have been subjected to the same treatment as described above as needed, are used. These core 1 and liner 2
As the adhesive used for bonding, the starch-based adhesive used in general corrugated board is not preferable from the viewpoint of water resistance, and a vinyl acetate-based emulsion is suitable in the present invention. The same applies to the bonding of corrugated board sheets.

[0008] As the interleaving paper 7, generally used white cardboard, chip cardboard, kraft paper, etc. are used. In order to increase the water resistance, a plurality of laminating machines are laminated with a vinyl acetate emulsion adhesive. It is made by pasting together. The decorative sheet 6 is also formed as a surface layer of the interleaving paper by this laminating machine.

The decorative sheet 6 includes decorative paper, coated paper, printed decorative paper, kraft paper with a printed pattern, paper such as thin paper, vinyl chloride, vinylidene chloride, polyamide, polyester terephthalate, polyolefin, acrylic, etc. A synthetic resin sheet having water resistance and moisture resistance is used. Further, vinyl chloride / flame-retardant paper such as wallpaper, a composite sheet of decorative paper and synthetic resin, such as printed coated paper / polyethylene (or polypropylene), may be used. Particularly when forming a woodgrain panel, it is preferable to use a wiping sheet made of vinyl chloride. When strength and surface strength are required depending on the application, it is effective to combine an aluminum foil with a synthetic resin decorative sheet. A vinyl acetate emulsion is generally used as the adhesive for attaching the synthetic resin decorative sheet to the slip sheet, and a vinyl chloride / vinyl acetate emulsion is suitable for the vinyl chloride sheet.

[0010]

The light-weight building material panel of the present invention having the above-mentioned structure has a plurality of corrugated boards in which liner paper or the like is stuck on both sides of a corrugated or chevron-shaped core, and the corrugated or chevron shape is in the same direction. By laminating so that the at least one surface of the panel cut so that the corrugated or chevron can be seen in the cross section, the decorative sheet is pasted so that the decorative sheet faces outward. It has high strength against bending in any direction. Furthermore, it effectively acts against warpage and twisting due to changes in temperature and humidity, and maintains smoothness. Further, if a decorative sheet made of a synthetic resin is used, even more excellent waterproofness and moistureproofness are exhibited.

[0011]

EXAMPLES Examples of the lightweight building material panel of the present invention will be specifically described below with reference to the drawings.

(Example 1) Coated paper (decorative sheet 6, 30 g / m 3) having a wood grain print is used by using a known interleaving machine for laminating and integrating a plurality of base papers with a vinyl acetate emulsion (adhesive). ^3. DAISEK manufactured by Dai Nippon Printing Co., Ltd. is laminated with liner paper (interleaving paper) to produce a decorative interleaving paper 7 having a total thickness of 0.5 mm.

Reinforced type MMS 200 g as core raw paper
/ M ² (Honshu Paper Co., Ltd.), corrugated corrugating machine for corrugated cardboard is used to process step A (step height 2.5 mm) to form a corrugated core 1, and as a corrugated cardboard base paper 2, a liner paper of 280 g / m ² is used. A vinyl acetate emulsion adhesive (Ricabond AC-315, manufactured by Chuo Rika) is attached to both sides of the core to form a corrugated board, and a corrugated board sheet having a thickness of 5.0 mm is manufactured.

Prepare 250 corrugated cardboard sheets 3,
A vinyl acetate emulsion adhesive (Rikabond AC-315, manufactured by Chuo Rika) was applied between them with a roll coater in an amount of 50 g / m ² and then overlapped so that the corrugated directions of the corrugated cardboard sheets coincide with each other. Combine and leave overnight with a load of 50 kg / m ² . As a result, a panel having a thickness of 1250 mm was obtained. This was cut into laminated layers so that a wavy shape could be seen in the vertical direction, and a panel 5 having a thickness of 8 mm was obtained.

An adhesive (Rikabond AC-315, manufactured by Chuo Rika Co., Ltd.) was applied on the back surface of each of the two interleaving sheets described above by a roll coater in an amount of 50 g / m ² , and the panel 5 was cut.
On both sides, a load of 100 kg / m ² was applied, and the mixture was left to stand overnight and dried to obtain a 9 mm thick lightweight building material panel 8 (specific gravity 0.42) with wood grain patterns on the front and back. After sufficiently drying this lightweight building material panel, as shown in FIG. 2, the interior door 10 was manufactured by incorporating it into a four-way frame 9 for doors made of a wood-based base material as a mirror plate. There was no such thing and it was cheap in cost.

(Example 2) A multi-layered kraft paper was manufactured as a slip sheet using a known slip sheet machine in which a plurality of base paper sheets were laminated and integrated with a vinyl acetate emulsion (adhesive), and then wood grain printing was performed. The vinyl chloride wiping sheet thus obtained is laminated with the multilayer kraft paper (interleaving paper) to produce a decorative interleaving paper 7 having a total thickness of 0.8 mm.

Reinforced type MMS 200 g as core raw paper
/ M ² (Honshu Paper Co., Ltd.), corrugated corrugating machine for corrugated cardboard is used to process step A (step height 2.5 mm) to form a corrugated core 1, and as a corrugated cardboard base paper 2, a liner paper of 280 g / m ² is used. A vinyl acetate emulsion adhesive (Ricabond AC-315, manufactured by Chuo Rika) is attached to both sides of the core to form a corrugated board, and a corrugated board sheet having a thickness of 5.0 mm is manufactured.

Prepare 200 corrugated cardboard sheets 3,
A vinyl acetate emulsion adhesive (Rikabond AC-315, manufactured by Chuo Rika) was applied between them in an amount of 50 g / m ² by a roll coater, and then the corrugated sheets were superposed so that the corrugated directions were the same. Combine and leave overnight with a load of 50 kg / m ² . As a result, a panel having a thickness of 1000 mm was obtained. This was cut into laminated layers so that a wavy shape could be seen in the vertical direction to obtain a panel 5 having a thickness of 10 mm.

An adhesive (Rikabond AC-315, manufactured by Chuo Rika Co., Ltd.) was applied to the back surface of each of the two interleaving paper sheets described above by a roll coater in an amount of 50 g / m ² , and the panel 5 was cut.
And was left to dry overnight with a load of 100 kg / m ² applied, and a 9 mm-thick lightweight building material panel 8 (specific gravity 0.46) having wood grain patterns on the front and back was obtained. After fully drying this lightweight building material panel, as shown in FIG. 2, the interior door 10 was manufactured by incorporating it as a mirror plate in the four-way frame 9 for doors made of a wood-based material, and it was also excellent in waterproofness and moisture resistance. On top of that, we were able to make a product that is lightweight, has no problem in strength, and is cheap in cost.

[0020]

As described above, the lightweight building material panel of the present invention has a corrugated or chevron-shaped core and sandwiches corrugated cardboard on both sides of the corrugated core. And a decorative sheet is laminated on at least one surface of a panel that is cut so that a wavy shape or a chevron can be seen in a cross section, and the decorative sheet is laminated outward. Therefore, while being lightweight, it has strength, and the manufacturing cost can be kept low as compared with the conventional one.

[Brief description of drawings]

FIG. 1 (a), (b), (c), (d),
(E), (f) is explanatory drawing which shows the manufacturing process of the lightweight construction material panel which is an Example of this invention.

FIG. 2 is a front view showing an interior door using the lightweight building material panel of the present invention.

[Explanation of symbols] 1 Core 2 Corrugated base paper 3 Corrugated cardboard sheet 4 Multi-layer corrugated cardboard sheet 5 Cut panel 6 Decorative sheet 7 Interleaf paper 8 Lightweight building material panel 9 Four-way frame for door

Claims (1)

[Claims] 1. A plurality of corrugated cardboard sheets 3 each having a corrugated or chevron-shaped processed core 1 sandwiched therebetween and a corrugated cardboard base paper 2 stuck on both sides thereof, and the corrugated or chevron-shaped sheets are stuck in the same direction. A lightweight building material characterized in that an interleaving paper 7 to which a decorative sheet 6 is adhered is adhered to at least one surface of a panel 5 cut so that a corrugated shape or a chevron can be seen so that the decorative sheet 6 faces outward. panel.