JPS6036960B2 - decorative board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a decorative board having a thermosetting resin decorative surface.

Conventionally, melamine resin decorative laminates, diacrylphthalate resin decorative laminates, benzoguanamine resin decorative laminates, etc. have been known as this type of thermosetting resin decorative laminates, but these conventional decorative laminates are printed with pigment ink on titanium base paper, for example. This is then impregnated with a thermosetting resin, and then this impregnated paper and a transparent paper that has been pre-impregnated with a thermosetting resin are layered and heat-pressed onto a decorative board substrate to laminate and integrate them. It was difficult to obtain clear patterns.

This invention has been made in view of the above circumstances, and it is an object of the present invention to provide a thermosetting resin decorative board with vivid colors and a good decorative effect.

That is, the present invention has a decorative board substrate, a sublimable or heat-melting dye printed surface on one side, and a thermosetting resin coated or soaked therein, and the printed surface is attached to the decorative board. The present invention provides a decorative board comprising a transparent patterned sheet attached directly or via a thermosetting resin-impregnated paper to the decorative board substrate in a state facing the substrate side.

In this invention, the pattern sheet to be attached to the decorative board substrate is printed on transparent paper with good resin solution impregnation properties using a printing ink containing a sublimation dye or a heat-melting dye,
This transparent sheet may be a mixture of natural fibers such as cellulose pulp, thermoplastic resin fibers such as vinylon, non-woven fabrics of natural fibers or synthetic fibers (for example, rayon, vinylon, polyester resin fibers or glass fibers, or synthetic pulp). paper, etc.) may be used.

These transparent sheets become transparent by impregnating them with a thermosetting resin and applying heat pressure.The impregnated resin hardens and becomes transparent due to the heat pressure applied when pasted to the decorative board substrate. At the same time, the dye develops a vivid color. The basis weight of the transparent sheet is preferably between 12 and 100 g/. There are no particular restrictions on the heat-melting or sublimable dyes to be added to the printing ink for printing on this transparent sheet. Dyes, disperse dyes, smoke dyes, pendine soluble dyes, oxidative dyes, etc. may be used.

There are no particular restrictions on the printing method, and conventional and commonly used means can be used as appropriate. The pattern is not limited to dye alone, but may also be combined with parts printed with pigment ink. Thermosetting resins used for transparent sheets or thermosetting resins used by polymerization with transparent sheets include conventional thermosetting resins such as melamine resins, diallyl phthalate resins, benzoguanamine resins, polyester resins, phenolic resins, and epoxy resins. Those used for plastic decorative boards can be used as appropriate.

The method of coating or impregnating these resins and the amount of impregnation are also carried out in the same manner as conventional methods. A transparent sheet with a predetermined pattern printed on it is impregnated with or coated with a thermosetting resin, and then the printed surface is placed facing the decorative laminate substrate and directly polymerized, or during the process, a thermosetting resin-impregnated paper such as titanium paper or One or more sheets of kraft paper impregnated with a thermosetting resin are interposed, polymerized into a decorative board substrate, and then aged using a hot press.

When a patterned sheet is directly polymerized onto a decorative board substrate as in the former case, it is possible to make use of the fabric on the surface of the substrate to harmonize with the pattern and enhance the design effect. In addition, when a thermosetting resin-impregnated paper is interposed as in the latter case, the impregnated paper and the pattern sheet may be polymerized and aged in advance, and then attached to the decorative board substrate via an adhesive. When a pattern sheet is polymerized onto a decorative board substrate, it is preferable for the printed surface to face the substrate in view of the abrasion resistance, stain resistance, chemical resistance, and migration resistance of the pattern.

Conditions for thermoforming the polymerized pattern sheets, decorative board substrates, etc. are determined by taking into account the type of thermosetting resin, etc., and determining the temperature, pressure, and pressing time.

Generally, a high molding temperature is favorable for color development of the dye. In addition, if the color development of the dye is insufficient, the color development may be promoted by performing a heat treatment such as placing the molded product in a heating oven or the like after molding. Example 1 A transparent paper with a basis weight of 40 g/paper was gravure-printed with an ink consisting of 10 parts of water-repellent acrylic resin (30% solids) and 1 part of sublimable dye (Diacelint Pink B). The paper was immersed in an impregnating liquid having the following composition, and the amount of impregnating liquid was adjusted to be 100 g per 10 pieces of patterned paper.

[Composition of impregnation liquid]

Diallyl phthalate polymer 93 parts Diallyl phthalate monomer 7 parts Penzoyl oxide (
Catalyst) Tripartite lauric acid
3 parts triene/acetone (4/1) 15 Foundation part Next, lay this resin immersion pattern paper on the veneer with the printed side facing down, place the patch board on top and the cushioning material on the bottom, Pressing was carried out under the conditions of 0.15k9/Sakaki and a pressurization time of 20 minutes.

As a result, the diallyl phthalate resin was cured and molded, and at the same time the dye developed color, resulting in a decorative board with a bright color that harmonized with the surface of the veneer and the pattern. Example 2 The resin-impregnated patterned paper obtained in Example 1 and the basis weight 8 female/
kraft paper (phenol resin impregnated paper) was layered on plywood and press-molded under the same conditions as in Example 1.

As a result, a decorative board with bright colors as in Example 1 was obtained. Example 3 A patterned paper gravure-printed with an ink containing the same dye as in Example 1 was immersed in a solution having the following composition to obtain a resin-impregnated patterned paper.

Next, this impregnated paper was layered on the veneer and heated at 170qC, 10
It was pressed by a hot-told method under the conditions of 0k9/ground and a pressurization time of 90 minutes. In the resulting decorative board, the transparent paper became transparent and the surface of the veneer was visible, and at the same time, the dye was vividly colored, giving it a high design effect. As detailed above, the decorative laminate according to the present invention uses sublimation or heat-melting dye, and uses the heat during the molding press to develop the dye at the same time as molding, so the colors are vivid. The decorative effect is striking compared to conventional ones.

Claims (1)

[Claims] 1. A decorative laminate substrate, with a sublimable or heat-melting dye printed surface on one side, and coated or impregnated with a thermosetting resin, with the printed surface facing the decorative laminate substrate. A decorative board comprising a transparent patterned sheet adhered to the decorative board substrate directly or through thermosetting resin-impregnated paper by heat and pressure.