JPS6049427B2 - Method for manufacturing laminate decorative board and decorative sheet used therein - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a laminated decorative board and a decorative sheet used therein. This eliminates the drawback that when laminating with adhesive, the surface of the decorative board obtained by assorting is not smooth due to partial accumulation of adhesive, traces of the adhesive application roll, etc., and the product value is reduced. The present invention relates to a method for providing a decorative board with a smooth surface and a decorative sheet used therein.

One of the commonly used methods for obtaining laminated decorative boards is to apply an adhesive such as an emulsion adhesive or water-soluble adhesive to a substrate such as plywood, particle board, or hardboard, and then apply a PVC decorative film. A method is known in which a decorative board is obtained by laminating decorative films such as the following by overlapping each other and applying pressure.

On the other hand, decorative boards with mirror-finished surfaces are also known, and in the case of such mirror-finished decorative boards, even the presence of slight irregularities on the surface impairs the surface design, so the commercial value is extremely high. It will drop.

Since the lamination method described above is a relatively simple process, it is preferable that the mirror-finished decorative board can also be produced by the lamination method, but in reality, such a normal lamination method is not used. The reason lies in the following points. First of all, it is very difficult to uniformly apply adhesive to the surface of a board with a normal size (for example, 3 x 6 feet), and therefore, it is difficult to apply adhesive uniformly to the surface of the board. Due to the nature of the product, the design quality of the mirror surface of the product deteriorates. The second reason is that even if the adhesive can be applied uniformly on the substrate, when laminating the decorative sheet on the substrate, there are problems such as the pressure of the laminating roll, unevenness on the surface of the substrate, expansion and contraction of the decorative sheet, and the thickness of the decorative sheet. Due to non-uniformity of thickness or the mutual effect of these, areas where a large amount of adhesive has accumulated are scattered (this phenomenon is called adhesive accumulation), and the surface of the product is One problem is that the design of the mirror surface is impaired.

An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a laminated decorative board whose mirror surface design is not impaired even by the above-mentioned ordinary lamination method. .

FIG. 1 is an explanatory diagram of an example of the adhesive surface of the decorative sheet of the present invention, in which a plurality of parallel or substantially parallel grooves 2 are formed on the surface (adhesive surface) on which the decorative sheet 1 is adhered to the substrate via an adhesive. It is being carried out.

FIG. 2 is an explanatory enlarged cross-sectional view of the decorative sheet of FIG. 1 when viewed from a cut surface taken along line A-A.

The grooves 2 are parallel or approximately parallel as shown in FIG. 1, and are made only on the adhesive surface, leaving the surface smooth. The grooves 2 may be continuous as shown in FIG. 1, or may be partially discontinuous, or may be straight or curved.

The arrow in FIG. 1 indicates the lamination direction, and in this case, the grooves 2 are formed parallel to the lamination direction.
The grooves 2 may be formed parallel to the laminating direction as shown in FIG. 1, or may be formed obliquely to the laminating direction as shown in FIG.

The decorative sheet 1 is made of vinyl chloride resin, ABS resin, styrene resin, etc., a film made of these resins mixed with an inorganic substance such as pigment, or a single film of these. Alternatively, it is preferable to use a composite material, and vinyl chloride resin is particularly preferable.

The depth of groove 2 is approximately 0.03 to 0.5TfUn1 width is approximately 0.03 to 0.5.
3-1.5? Also suitable are the ranges of .

Further, it is preferable that the distance between the grooves is in the range of 0.3 to IOTrOn. It is 0.03m deep
! If the width is less than n, or the width is less than 0.3Tf1m, or the interval is more than 1, it will not be possible to prevent the adhesive from pooling, and if the depth is more than 0.5, or the width is 1.5T!
This is because if the spacing is more than Un or less than 0.5wn, the decorative sheet will be dented in the groove portion, making it difficult to keep the surface of the decorative board smooth. The grooves 2 can be formed by pressing an embossing plate or an embossing roll onto the decorative sheet.

The decorative sheet 1 on which the grooves 2 have been formed in this way is
As shown in the figure, after the adhesive 4 is applied to the substrate 3, the substrates 3 are overlapped and pressed by a laminating roll 5 to form a film in the direction of the arrow.

The arrow in FIG. 4 indicates the lamination direction, similar to the arrow j in FIG. 1 or 3, and ? Lamination is performed in a direction parallel or oblique to the flow direction of the groove 2.

The substrate 3 may be in the form of a plate such as plywood, particle board, hardboard, metal plate, or plastic plate, but may also be in the form of a film.

As the adhesive 4, any desired adhesive can be selected and used, and the most suitable adhesive may be used depending on the material to be laminated, and it may be an emulsion adhesive, a water-soluble adhesive, or the like.

FIG. 5 is an explanatory cross-sectional view of the decorative board thus obtained.
In the present invention, since grooves are provided on the adhesive surface of the decorative sheet, the phenomenon of adhesive pooling in the conventional lamination method occurs in the grooves that have been provided in advance, and therefore the surface of the decorative sheet is This makes it possible to produce mirror-finished decorative laminates using the lamination method, which was previously considered difficult, without the effects of adhesive buildup. Furthermore, since the lamination is carried out in a direction parallel or oblique to the flow direction of the grooves, pooling can be easily escaped compared to when the grooves are provided at right angles to or at an angle close to the flow direction of the grooves.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of an example of the adhesive surface of the decorative sheet of the present invention, FIG. FIG. 4 is an explanatory view of another example of the adhesive surface of the decorative sheet of the invention, FIG. 4 is an explanatory view of the lamination process, and FIG. 5 is an explanatory cross-sectional view of the decorative board obtained by the method of the invention.

1... Decorative sheet, 2... Groove, 3...
...Substrate, 4.Adhesive, 5..Lamination roll.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a decorative board by applying an adhesive to a substrate, overlapping decorative sheets and laminating by applying pressure, wherein only the adhesive surface of the decorative sheet has a depth of 0.
．． A plurality of parallel or nearly parallel grooves of 0.3 to 0.5 mm, width of 0.3 to 1.5 mm, and an interval of 0.5 to 10 mm between the grooves are provided, and A method for manufacturing a laminated decorative board, characterized in that the decorative sheet is laminated on the substrate from a parallel or oblique direction. 2 The depth is 0.03 to 0.5 only on the adhesive surface of the decorative sheet.
mm, width 0.3-1.5mm, distance between grooves 0
．． Having multiple parallel or approximately parallel grooves of 2 to 10 mm,
A decorative sheet for lamination, characterized in that the opposite side is smooth. 3. The decorative sheet for lamination according to claim 2, wherein the grooves on the back surface are formed in a direction parallel or oblique to the lamination direction.