JPS5951909B2 - Manufacturing method of melamine decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a melamine decorative board with a three-dimensional sense, and is characterized by using linter paper printed with transparent ink with good penetration as pattern paper, To provide a method for manufacturing a melamine decorative board full of three-dimensional sensation by molding.

The present invention will be described in detail below. A thick paper, preferably 800 g.
Ink is penetrated shallowly or deeply into linter paper with a weight of 0 g/m2 or more, and a three-dimensional pattern is printed as shown in Figure 1.
A melamine resin-impregnated patterned paper with a linter paper base is prepared by impregnating and drying a highly transparent melamine resin to a resin impregnation rate (solid resin adhesion rate to paper) of 40 to 240% by weight using a known method. do.

The structure of the resin-impregnated paper in the method for manufacturing a decorative board of the present invention is as shown in FIG. It consists of a structure in which layers are sequentially stacked (FIG. 2) or a structure in which the overlay layer 3 is removed (FIG. 3).

The overlay layer 3 is made by a known method of impregnating α-cellulose-based transparent paper with a weight of around 25 g/m2 or resin-impregnated ceramic transfer base paper with good transparency after pressing, and drying it with a melamine-based resin with excellent transparency. This is a well-known overlay paper that is used especially when the printed pattern is worn away under harsh conditions.

Next, the pattern layer 4 is constructed by laminating one or more sheets of melamine resin-impregnated pattern paper with a linter paper base prepared as described above, but the total weight of the linter paper must be 80 g/m or more, If it is less than 80 g/m2, the three-dimensional effect will be poor and the effect of the present invention will be halved. The appropriate resin impregnation rate is 40 to 240% by weight; if it is less than 40%, the surface after hot-press molding tends to become opaque; if it is 240% or more, the resin tends to ooze out during hot-press molding. Next, the barrier layer 5 is used to make the printed translucent layer appear more effectively, and is made of opaque titanium paper or the like impregnated with melamine-based phenolic resin and dried. By using a board printed with seven single colors or a pattern that harmonizes with the hue pattern, a decorative board with even more three-dimensionality can be obtained. Next, the core layer 6 is a base material layer used in ordinary decorative boards, and is made of kraft paper impregnated with a phenolic resin, and one or more sheets of the core layer are used, increasing or decreasing the thickness as desired depending on the thickness of the molded product. Next, the backing paper 7 is used as necessary to prevent the decorative board from warping after hot-press molding. Here, in the present invention, the composition weight ratio of the melamine resin-impregnated paper layer which becomes the overlay layer 3 and the pattern layer 4 is 45% or less, and the composition of the phenol resin-impregnated paper layer which becomes the back layer consisting of the core layer 6. It is preferable that the weight ratio is 55% or more.

That is, if the melamine resin-impregnated paper layer exceeds 45%, the crack resistance of the melamine decorative board after molding will be significantly reduced, causing a practical problem. For example, after adhering the melamine decorative board obtained according to the present invention to a 20 m/m thick plywood board with a urea adhesive,
As a result of the test, no elongation of cracks was observed in decorative laminates with a composition weight ratio of paper impregnated with melamine resin of 40% or less, whereas elongation of cracks in decorative laminates with melamine resin-impregnated paper of 50% or more was 10 m/m. I grew more than that and got a failing result. As the patterned paper for the translucent layer used in the present invention, other natural fiber patterned papers can be used in terms of heat resistance and transparency, but Linta paper is the best in terms of transparency. It was confirmed.

Furthermore, in order to more effectively bring out the three-dimensional effect of the decorative board, which is a feature of the present invention, it is possible to make the surface of the molded product uneven or change its gloss during hot-press molding.

Next, the present invention will be explained by examples.

Example 1 Resin-impregnated patterned paper was obtained by adhering 160 g/M2 of melamine resin to a patterned printed paper in which a marble pattern was three-dimensionally printed on a 150 g/M2 piece of linter paper with transparent ink having good permeability.

Next, melamine resin was applied to 100g/M2 white titanium paper.
A barrier paper to which 0 g/M2 was attached was prepared. Next 19
60g/M of phenolic resin on 0g/M2 kraft paper
Kraft impregnated paper for the core layer was prepared. Next, add 3 pieces of kraft impregnated paper from the bottom of each prepared impregnated paper,
Layer one barrier paper and one resin-impregnated patterned paper in order.
The composition weight ratio of the melamine resin layer and the phenolic resin layer is 4
Using a stainless steel mirror plate as a backing plate, the molding temperature was 140℃ and the molding pressure was 80k.
g/Cm2 and a molding time of 30 minutes, the molded product was hot-pressed and then cooled and decompressed to obtain a decorative board. The obtained decorative board had excellent crack resistance and a three-dimensional effect that reproduced the personality of natural marble.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a piece of linter paper printed with transparent ink, and FIGS. 2 and 3 are configuration diagrams of a decorative board. 1...Rinter base paper, 2...Design with transparent ink, 3...Overlay layer, 4...
・・・Resin-impregnated patterned paper made of linta paper, 5...
... Barrier layer, 6 ... Core layer, 7 ...
...Backing layer.

Claims (1)

[Claims] 1. A linter paper with a pattern printed with transparent ink, a patterned paper impregnated with melamine resin as a surface layer, and a barrier layer and a core layer are combined and integrated by thermo-pressure molding. A manufacturing method for melamine decorative board. 2. The method for producing a melamine decorative board according to claim 1, wherein the linter paper is a patterned paper with a weight of 80 g/m^2 or more and a melamine resin impregnation rate of 40 to 240% by weight.