JPH1146876A - Top board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a top plate by which a decorative laminated sheet can be recycled, and which is superior in the water resistance, and effectively used as the top plate for a steel desk, and the top plate for a sink cabinet, a lavatory dressing table or the like, by forming the top plate by integrally laminating the paper impregnated with thermosetting resin, the waterproof converted paper, an adhesive agent and a core material successively by a surface with this order. SOLUTION: A decorative laminated plate to be adhered to a core maternal with an adhesive agent 3, is formed by integrally laminating a paper impregnated with thermosetting resin 1, and a waterproof converted paper 2. Concretely the top plate is formed by integrating the overlay paper impregnated with thermosetting resin 10, the pattern paper impregnated with resin 11, the core paper impregnated with resin 12 and the water-proof converted paper 2 by heat pressure molding to prepare a decorative laminated sheet of which a surface is the paper impregnated with thermosetting resin 1, and a rear surface is the water-proof converted paper 2, and adhering the same to a core material 4 such as a steel-plate or the like, or a base for top plate such as a plywood or the like by utilizing the adhesive agent 3. The coated paper prepared by coating the sizing agent-containing paper of 30-150 g/m<2> of basic weight, or the like with a thermoplastic resin emulsion or the like, can be preferably used as the water-proof converted paper 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recyclable top plate.

[0002]

2. Description of the Related Art Conventionally, a thermosetting resin decorative board such as a melamine decorative board or a polyester decorative board is pasted on a core material surface such as a steel sheet or a plywood with an adhesive such as a rubber-based or vinyl acetate-based emulsion. The top plate is used as a top plate for steel desks, top plates such as sinks and vanities, and counters for stores.

[0003]

However, even if the surface of the thermosetting resin decorative board is replaced due to scratches on the surface during use for a long period of time, resulting in poor surface smoothness or outdated fashion. It cannot be peeled off and must be disposed of in the state of products such as steel desks, sinks and vanities, or only the top plate needs to be replaced and used, which is a problem in terms of effective use of resources. was there.

[0004] An object of the present invention is to provide a top plate capable of easily peeling off a thermosetting resin decorative plate bonded to the surface of a core material and newly bonding another thermosetting resin decorative plate. It is in.

[0005]

According to a first aspect of the present invention, there is provided a top plate comprising a thermosetting resin-impregnated paper, a water-resistant paper, an adhesive and a core material laminated and integrated in this order from the surface. is there.

A second aspect of the present invention is a coated paper in which the water-resistant processed paper is formed by applying a thermoplastic resin emulsion or a rubber latex to a sizing agent-added paper or a fluororesin-impregnated paper having a basis weight of 30 to 150 g / m ^2. A top plate according to claim 1.

Hereinafter, the present invention will be described with reference to the drawings of embodiments. FIG. 1 is a sectional view showing the structure of the top plate of the present invention, and FIG.
Shows a sectional view of the structure of a conventional top plate.

[0008] In the top plate of the present invention, the decorative plate bonded to the core material 4 with the adhesive 3 is obtained by laminating and integrating a thermosetting resin-impregnated paper 1 and a water-resistant paper 2. As a manufacturing method, for example, an overlay paper made of thin paper is impregnated with a thermosetting resin for a decorative board such as a melamine resin, a diallyl phthalate resin, or an unsaturated polyester resin, and the thermosetting resin-impregnated overlay obtained by drying. A paper 10 and a pattern (pattern) paper formed by printing a desired color or pattern are impregnated with a thermosetting resin for a decorative board as described above, and then dried by drying. If necessary, kraft paper may be impregnated with a phenolic resin or the resin for decorative board described above and dried to form a thermosetting resin-impregnated core paper 12.
And a hot-press molding by laminating the water-resistant paper 2 on the back surface via the intermediate layer.

Here, as the water-resistant paper 2, the sizing agent-added paper, that is, the sizing agent such as rosin, gelatin, starch, synthetic resin, etc. is mixed with pulp or coated on the surface of the paper to prevent the ink from bleeding. It has water and oil resistance, such as size paper with improved paper surface and fluorine resin impregnated paper, paraffin paper, parchment paper, etc.
The resin for the decorative board is hardly impregnated, and has a basis weight of 30 to 150 g.
/ m ^{2, which is} a thin processed paper with improved inter-sheet strength and water resistance.

[0010] Among them, a sizing agent-added paper having a basis weight of 30 to 150 g / m ² or a fluororesin-impregnated paper is used as a base material, and an acrylic emulsion, a methyl butadiene rubber (MBR) emulsion, an ethylene- A special coated paper (coated paper) coated with 10-30 g / m ^{2 of a} thermoplastic resin emulsion such as a vinyl acetate copolymer (EVA) emulsion or a fluororesin or a rubber latex is used as a water-resistant treated paper.
The resin does not ooze out of the resin-impregnated core paper during hot-press molding, the paper quality is maintained, and the adhesive is well-adhered, so that the adhesiveness is good. In addition, the post-form workability in which the decorative board is bent while being heated is excellent, and even if the radius of curvature is reduced, cracks and insufficient adhesion are less likely to occur.

The top plate of the present invention comprises, for example, a thermosetting resin-impregnated overlay paper 10 and a resin-impregnated pattern paper 1 as described above.
1. The resin-impregnated core paper 12 and the water-resistant paper 2 are laminated and integrated by heating and pressing using a normal hot platen hot press or continuous hot-pressing machine, and the surface is impregnated with a thermosetting resin. Adhesive processing using a glue 3 on a core 4, for example, a top plate base made of steel plate, plywood, particle board, silica board, etc., using a paper 1 as a decorative board made of water-resistant paper 2 on the back side. Can be obtained by Also,
At the time of manufacturing the decorative board, the adhesive 3 may be applied to the core material 4 and then obtained by simultaneous molding.

The adhesive 3 is not particularly limited, and may be an emulsion of a thermoplastic resin such as a vinyl acetate resin or an acrylic resin, an organic solvent type, a synthetic rubber latex such as a chloroprene type or a styrene butadiene type, or an organic solvent. Mold, condensation type resin such as urea resin and phenol resin, addition polymerization type resin such as urethane type resin and epoxy type resin, S
There are hot-melt resins made of IS, SEBS, EVA, etc., which can be used arbitrarily from commercially available adhesives depending on the properties of the core material and required performance.

[0013]

The top plate of the present invention is laminated and integrated in the order of thermosetting resin-impregnated paper 1, water-resistant paper 2, adhesive 3 and core material 4 from the surface. Has the same hardness, heat resistance and chemical resistance as.

As described above, when replacing the thermosetting resin decorative board on the surface due to abrasion or the like, a blade or the like is inserted into the water-resistant paper 2 so that the portion of the thermosetting resin-impregnated paper 1 is removed. Can be easily peeled off.

Thereafter, in order to newly attach another thermosetting resin decorative board, the adhesive 3
The replacement work (recycling) is completed by applying a decorative sheet thereon.

In the bonding process, the backside sanding is necessary when the conventional backside is made of a thermosetting resin-impregnated paper. However, in the present invention, the backside sanding is required for the processed paper having a good affinity with the adhesive. Adhere well without it.

[0017]

EXAMPLE A decorative plate used for a top plate was manufactured as follows. Example 1 Kraft paper was impregnated with a phenol resin initial condensate aqueous solution on coated paper obtained by applying an acrylic emulsion to a sizing agent-added paper having a basis weight of 70 g / m ^{2 at} a solid resin content of 20 g / m ^2. , A resin-impregnated core paper made of three dried core papers, and a resin-impregnated pattern paper and a resin-impregnated overlay paper each impregnated with an aqueous solution of the initial shrinkage of melamine resin.
The sheets are laminated one after another, inserted into a hot press sandwiched between plating plates, heated and pressed at 150 ° C. and 100 kg / cm ^{2 for} 30 minutes, cooled to 40 ° C. and depressurized. The decorative board of Example 1 was obtained by laminating and integrating water-resistant paper (coated paper) on the back surface of the thermosetting resin-impregnated paper used for the board.

Comparative Example 1 The decorative board of Comparative Example 1 (conventional example) consisting of the back surface of a thermosetting resin-impregnated paper was prepared in the same manner as in Example 1 except that the coated paper (waterproof paper) was not used. Veneer).

Comparative Example 2 In Example 1, a basis weight of 1 for core paper was used instead of coated paper.
The decorative board of Comparative Example 2 was formed in the same manner except that kraft paper (unimpregnated paper) of 50 g / m ² was used, and the unimpregnated paper was laminated and integrated on the back surface of the thermosetting resin-impregnated paper.

Next, a steel plate having a thickness of 1 mm serving as a core material of a top plate for a steel desk is coated with a solvent-type chloroprene-based adhesive, Aika Aibon RC-ET (manufactured by Aika Kogyo Co., Ltd.).
About 150 g / m ² on the surface coated with about 150 g / m ² , and on the back of each decorative board of Example 1 and Comparative Examples 1 and ^2.
The coated surface was attached to form a top plate.

The recyclability and water resistance of each decorative plate bonded to the surface of each top plate were measured as follows, and the results are shown in Table 1.

1. Recyclability possible or not Water-resistant paper layer, adhesive layer, between top plate core material and decorative board
A blade was inserted into one of the unimpregnated layers, and those with a decorative board that could be easily peeled off were acceptable, while those that could not be removed were not.

2. Good and bad water resistance After the top plate was immersed in water for 24 hours, there was no problem when there was no abnormality, and when there was a peeled part near the adhesive layer, it was bad.

[0024]

[Table 1]

[0025]

As is clear from Table 1, the top plate of the present invention is capable of recycling a decorative plate and has excellent water resistance, whereas the conventional top plate with a decorative plate has poor recyclability. . In addition, the one in which unimpregnated paper is added to the back of the decorative board has good recyclability but poor water resistance.

Therefore, the top plate of the present invention is useful as a top plate for a steel desk, a top plate such as a sink or a vanity table, and a counter for a store.

[Brief description of the drawings]

FIG. 1 is a structural sectional view of a top plate according to the present invention.

FIG. 2 is a cross-sectional view of a configuration of a conventional top plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermosetting resin impregnated paper 2 Water resistant paper 3 Adhesive 4 Core material 10 Resin impregnated overlay paper 11 Resin impregnated pattern paper 12 Resin impregnated core paper

Claims (2)

[Claims] 1. A top plate characterized in that a thermosetting resin-impregnated paper, a water-resistant paper, an adhesive and a core material are laminated and integrated in this order from the surface. 2. A water-resistant paper having a basis weight of 30 to 150 g / m ^2.
The top plate according to claim 1, wherein the top plate is a coated paper obtained by applying a thermoplastic resin emulsion or rubber latex to a sizing agent-added paper or a fluororesin-impregnated paper.