JPS5844474B2 - It's a good idea to have a good time. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses decorative thin veneer or decorative impregnated paper laminated on plywood molded from a fibrous material as a material, and uses the surface of the decorative board as a material for high-class furniture, doors, cabinets, side panels, etc. Decorative boards that reveal elaborate three-dimensional carving patterns with a calm elegance and a variety of changes, such as those seen in so-called molding panels used to decorate boards, bookshelves, etc., are made using traditional methods that are complicated but require skill. Without using manual mold processing technology, only by pressure molding method using pattern mold,
The present invention relates to a method that is technically easy and economically advantageous.

The above-mentioned molding panel is manufactured by cutting the surfaces of the member according to the desired design, for example, by using a three- or four-sided automatic plane machine,
It is already known that it can be manufactured by mold cutting using mechanical tools such as single-axis or multi-axis chamfering machines, router machines, wood milling machines, etc., as well as manual operations.

However, in order to obtain a three-dimensional engraved pattern corresponding to a desired design using such conventional mold cutting technology, not only is the type of tree that can be used as the material restricted, but also a finishing coat is usually applied after molding. However, in that case, depending on the type of material used, the final coating may reduce the value of the material, and furthermore, complex and elaborate three-dimensional patterns are required when processing the mold. In such cases, a large proportion of manual operations are required and skill is required, making it extremely inefficient.

The method of manufacturing a decorative board with a permanent three-dimensional carved pattern according to the present invention is a method proposed to overcome the difficulty and complexity of conventional mold operations as described above. Made of decorative thin veneer or decorative impregnated paper laminated on plywood made of high-quality material - L, without losing the beauty of natural precious wood of decorative thin veneer, or the complex beautiful pattern of decorative impregnated paper. We have succeeded in providing a new decorative board in which a three-dimensional sculptural pattern consisting of a desired design can be precisely realized by utilizing only the pattern mold and heat pressing operation.

That is, the technical configuration of the present invention is to expose the rough fiber surface on the surface layer of plywood formed from a fibrous material, and then apply and impregnate the ridged surface with a solution or emulsion of a polymeric substance that can be cured by heat. If necessary, substantially only the solvent in the solution or emulsion is scattered without curing, and then a decorative thin veneer or decorative impregnated paper is placed on top of the adhesive impregnated sheet, and after temporary adhesion, Prepared laminate Q) At least the entire surface of the laminate is surrounded by a thermoplastic film having a film-forming ability through subsequent heat pressing, and then before the above-mentioned soaking and hardening of the adhesive. The laminated decorative thin veneer or decorative impregnated paper side is brought into contact with a patterned surface provided with a three-dimensional sculptural pattern and then hot pressed.

The plywood that forms the material of the decorative board with a three-dimensional sculptural pattern on its surface provided by the present invention is mainly a plate-like material such as particle board, chipboard, or artificial wood, or hard fiberboard or nonwoven fabric. , fiberboard,
Adopted from plate-shaped fiber molded bodies such as pressed felt.

Although the thickness is not particularly limited, generally a thickness of 10 to 20 mm is not only easy to handle during the subsequent heat compression molding, but also the molded product can be used in a wide range of applications. It is.

In addition, all of the base plates made of these selected fibrous materials have their surfaces phase-inverted, in other words, those in which fine short fibers forming the fibrous material are clustered on the surface are used.

Therefore, the fiber-formed body as exemplified above originally has a phase change surface on its surface and can be used as is, but in the case of a plate-like body lacking a phase change surface as exemplified above, it is necessary to Processing means such as cutting the relatively smooth surface to expose the fine short fibers and phase invert them are taken.

Of course, such processing means can also be applied to the fibrous material when it is necessary to expose the rough surface to a larger extent.

The moisture content of the plywood thus selected is an important factor that influences the product value of the decorative laminate, which is the object of the present invention, and is preferably adjusted to within a range of 8 to 13%.

In the present invention, a solution or emulsion consisting of a composition containing a heat-curable polymer substance is applied to the surface layer of the plywood in advance to impregnate it.
Examples of the polymeric substances include urea formalin resin, melamine formalin resin, thermosetting acrylic resin, phenol resin, resolmin resin, epoxy resin, diallylphthale-1 resin, natural rubber, styrene butadiene resin,
Butadiene acrylonitrile rubber and the like are used alone or in combination.

Impregnation is carried out by applying a solution or emulsion of a composition containing these polymeric substances using means such as brushing, spray roll coater, spreader, or the like.

In this coating/impregnating operation, technical attention must be paid especially to the thickness of the impregnated surface layer.

This is determined by the depth and shape of the pattern of the mold with the three-dimensional sculptural pattern used for the subsequent heat pressing, but generally the surface layer of the plywood corresponds to the 1st to 3rd section. Care must be taken to ensure that it is evenly distributed.

What is important for history is that the solution or emulsion containing the heat-curable polymer substance impregnated into the surface layer of the plywood is kept at room temperature to 30"C for 30 minutes without being immediately heat-cured. Substantially all of the solvent or water contained in the solution or emulsion must be evaporated by leaving the solution or emulsion for 48 hours.

Then, in the present invention, a decorative thin flat plate or decorative impregnated paper is temporarily adhered onto the plywood having the surface layer impregnated with an uncured polymeric substance as described above via an adhesive impregnated sheet provided on the surface layer.

The temporary adhesion is left as it is for 2 to 3 hours at room temperature with low strength [1
This is done by leaving it under pressure and drying it to the touch.

Note that the adhesive impregnated sheet refers to a base material impregnated with an impregnating agent such as natural rubber, synthetic rubber, or synthetic resin that can be cured by heat.

In this case, the base material is selected from paper, fabrics, and fabrics such as small woven fabrics.

The impregnating agents that can be impregnated into these base materials include:
For example, one or more of natural rubber or synthetic rubber such as styrene-butadiene rubber, nitrile rubber, polybutadiene, and polychloroprene, polyester resin, hardened acrylic resin, arylphthalate resin, epoxy resin, and phenol resin. Applicable.

In addition, this adhesive impregnated sheet can be used in cases where it is desired to faithfully reproduce delicate and elaborate engraved patterns during heat pressing using a mold with three-dimensional engraved patterns in the subsequent process. As the impregnating resin, a thermosetting acrylic resin (a copolymer of methylolated methacrylamide or methylolated amide that provides a functional side chain to styrene, methacrylic ester, acrylic ester, acrylonitrile, etc.) is used as the impregnating resin. The purpose can be achieved by using a base material impregnated with the added composition to a fat content of 75 to 80%.

The decorative thin veneers referred to in the present invention are oak, elm, sakshi,
Steamed flitches made of domestic materials such as Shioji, or imported materials such as teak, walnut, rosewood, zebrawood, and mahogany are sliced into thin pieces using a slicer to a thickness of approximately 0.2 to Q.7 mm, preferably 0.2 to Q.7 mm. 25-0
35 It means so-called veneer boards with grains such as straight grain, cross grain, board grain, heather, and lumps.

The moisture content of these cut decorative thin veneers varies depending on the type of impregnating agent for the surface layer of the plywood or the type of adhesive on the plywood, but if the impregnating agent is a material such as epoxy resin, it will be around 50%. However, in the case of materials such as diallyl phthalate, it must be adjusted to about 10%, but generally it is around 8 to 50%. For example, this is one of the factors that provides a decorative board with a faithfully reproduced pattern.

On the other hand, the decorative impregnated paper used in place of the decorative thin veneer is a base paper made of a thermosetting synthetic resin alone or a composition in which a thermoplastic synthetic resin is blended with sulfide pulp, 1-noyon pulp, etc. Patterned paper with wood grains and patterns printed on it impregnated with oil, and has an oil content of 45 to 70.
A commercially available product having a thickness of 2 to 5 mils is used.

In the case of manufacturing such commercially available decorative impregnated paper, impregnating resins include phenol resin, diallyl phthalate resin, melamine resin, unsaturated polyester resin, epoxy resin, guanamine resin, thermosetting acrylic resin, methacrylic acid ester, etc. It is known that
When it is necessary to faithfully reproduce a delicate and elaborate engraved pattern during hot pressing of a mold provided with a three-dimensional engraved pattern in the subsequent process of the present invention, diallyl phthalate is used as the impregnating resin. A composition in which a thermosetting acrylic resin (a copolymer of methylolated methacrylamide or methylolated amide that provides a functional side chain to styrene/methacrylic acid ester, acrylic acid ester, acrylonyl l-IJ, etc.) is added to the resin. The goal was achieved by using a base paper impregnated with oil to a fat content of 75 to 80%.

The laminate consisting of plywood and decorative thin veneer or decorative impregnated paper that has been temporarily bonded as described above is then coated with a polyester film or polypropylene film on the entire surface or at least on the surface of the decorative thin veneer or decorative impregnated paper. It is surrounded by a thermoplastic film, such as polyethylene film, polyamide film, etc., which has the ability to form a film by subsequent heat pressing.

As a result, it does not have cushioning properties, slipperiness, mold flow, etc. that are adverse to the mold during hot pressing, and has a good mold release effect, making the hot pressing work easier and mold The molded product of the present invention has the effect of always having a constant mold pattern with high fidelity.

Note that these thermoplastic films may be surrounded using an adhesive.

Thereafter, the laminate is placed on a mold having a three-dimensional engraved pattern corresponding to the desired design, which is placed on a hot press.
A decorative thin veneer or decorative impregnated paper is placed in direct contact and heat-pressed.

The working conditions for heat pressing are not necessarily constant depending on the type of polymeric substance impregnated into the surface layer of the plywood, but generally 9.
The standard may be 0 to 170°G, 70 to 250 kg/, 71 to 5 minutes.

Due to such heat pressing, the decorative thin veneer or decorative impregnated paper that comes into contact with the engraved surface of the mold, together with the resin-impregnated surface layer of the plywood, deforms against the engraved surface of the mold, resulting in a number of A decorative board is obtained in which the engraved pattern is transferred and permanently fixed, and the engraved pattern of the present invention is fully expressed.

Next, examples of the present invention will be shown.

A plywood board made of particle board with a moisture content of 12% and a thickness of 15Tt11 was prepared, its surface was cut to expose the phase change surface where fine short fibers were crowded, and an impregnating resin having the following composition was applied to the surface layer corresponding to 2TtrIL. Apply multiple coats with a spreader to impregnate.

Examples of blending resins for impregnation (1) 100 parts by weight of diallyl phthalate furopolymer 10 parts by weight of diallyl phthalate 1 Hemotsmer After impregnation, the resin was allowed to stand for about 30 minutes to volatilize the solvent, and then an impregnated adhesive sheet was layered.

The adhesive impregnated sheet contains diallyl phthalate 100 on the base paper.
10 parts by weight of diallyl phthalate monomer, 3 parts by weight of benzoyl peroxide, 5 parts by weight of trichloroethane
It is obtained by impregnating it in an impregnating solution consisting of 0 parts by weight.

Next, separately prepared moisture content of 13% between thickness 0 and 3
Decorative thin veneers obtained from mahogany materials adjusted to urge

Next, the laminate consisting of the plywood and decorative thin veneer, temporarily bonded as described above, is surrounded by a polyester film via an adhesive, and then this material is pressed into a press-L using a hot press. The decorative thin veneer is placed in direct contact with the film in a mold engraved with the desired design, and heat-pressed at 130°C, 1100kg/Cil, for 3 minutes, making it waterproof and moisture resistant. sex,
It is possible to produce a decorative board with a permanent carved pattern that has excellent weather resistance, heat resistance, abrasion resistance, chemical resistance, etc.

Note that the polyester film is peeled off from the surface of the obtained decorative board after molding or during use of the decorative board.

Claims (1)

[Claims] 1. After exposing the rough fiber surface on the surface layer of plywood formed from a fibrous material, the ridge surface is impregnated with a solution or emulsion of a polymeric substance that can be cured by heat,
Without curing, if necessary, substantially only the solvent in the solution or emulsion is dispersed, and then a decorative thin veneer or decorative impregnated paper is layered via an impregnated sheet for installation, and after temporary adhesion, the product is prepared in this way. At least the entire surface of the laminate is surrounded by a thermoplastic film capable of forming a film by subsequent heat pressing, and then, before the impregnation and curing of the adhesive, the surrounding laminated makeup is A method for producing a decorative board with a permanent three-dimensional carved pattern, characterized by bringing a thin veneer or decorative impregnated paper side into contact with a pattern surface provided with a three-dimensional carved pattern and heat-pressing it.