JP3153005B2 - Method for manufacturing veneer having embossed texture due to unevenness and deep painting feeling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a method for producing a veneer having an embossed texture and a deep coating feeling used as a surface finishing decorative material for various building materials and furniture.

[0002]

2. Description of the Related Art A veneer made of a thin wooden plate peeled off to a thickness of about 0.2 to 1.0 mm is mainly used as a decorative material for furniture, light electric cabinets, housing materials, partition materials, store interior materials and the like. By applying the colored transparent coating a plurality of times, a deep high-grade coating feeling is imparted.

[0003]

As described above, in order to obtain a deep, high-grade painting feeling, it is necessary to repeatedly perform complicated painting, which is troublesome.
Further, after the veneer is attached to a predetermined base material, the surface of the veneer is coated, and has a drawback such that an embossed texture due to unevenness cannot be expressed.

On the other hand, the present invention provides a method for obtaining a veneer having an embossed texture on the surface and having a deep coating feeling without going through a coating step.

[0005]

The above object can be attained by the method of the present invention for producing a veneer having an embossed texture due to unevenness and a deep coating feeling according to the present invention.

That is, the method of the present invention for producing a veneer having an embossed texture due to the unevenness and a deep coating feeling is characterized in that a transparent or translucent thermoplastic is provided on the surface of the veneer or a veneer having a backing material laminated on the back surface. The resin film is placed via a transparent or translucent hot melt type adhesive layer, and in a state where the transparent or translucent thermoplastic resin film surface is in contact with an embossed plate having irregularities, By hot-pressing this between hot plates, the hot-melt type adhesive layer is caused to flow, and a recess is formed from the transparent or translucent thermoplastic resin film surface to the adhesive layer. Become. According to a second aspect of the present invention, in the method for manufacturing a veneer having an embossed texture due to the unevenness according to the first aspect of the invention and a deep coating feeling, the transparent or translucent thermoplastic resin film is formed on the surface of the film. It consists of using a film having a surface protective layer made of a curable resin. According to a third aspect of the present invention, in the method for manufacturing a veneer having the embossed texture due to the unevenness according to the first or second aspect of the invention and a deep painting feeling, the transparent or translucent adhesive layer is formed by hot melt. Formed by a type of adhesive. Different

In the method for producing a veneer having an embossed texture by irregularities and a deep coating feeling according to the present invention, the transparent or translucent thermoplastic resin film is coated on the surface of a curable resin. It is preferable to use a film having a protective layer.

[0008] In the method of the present invention having the above structure, the veneer used for bonding to the transparent or translucent thermoplastic resin film has a thickness of 0.1 to 1.0 mm, preferably about 0.1 to 0.3 mm. belongs to. As the wood for the veneer, it is preferable to select and use a wood with a high grain design from ordinary woods such as cedar, cypress, zelkova, pine, oak, paulownia, teak and ash.

Further, a veneer made of a veneer obtained by laminating a plurality of veneers with an adhesive and then pressing the laminated veneer and slicing the assembled flitch from an arbitrary direction may be used.

[0010] As the veneer, those subjected to a coloring treatment, those provided with a pattern printing layer or a transparent coloring layer, and those laminated with a base material for a decorative material such as a thermosetting resin-impregnated paper on the back surface are used. Further, if necessary, the resin may be subjected to a water resistance treatment, an impregnation treatment with a polyester resin for improving the strength between layers, or the like.

The backing material laminated as necessary on the back surface of the veneer is made of paper, nonwoven fabric, knit, woven fabric, etc., and functions as a reinforcing material for the veneer, preventing cracks of the veneer, It facilitates handling.

On the back surface of the veneer, a cosmetic made of thermosetting resin such as diallyl phthalate resin, benzoguanamine resin, phenol resin, melamine resin, unsaturated polyester resin, epoxy resin, urethane resin, etc. When the base material is laminated, the rigidity of the veneer having the embossed texture and the deep coating feeling obtained by the unevenness obtained by the method of the present invention becomes particularly good. When the decorative material base material made of the resin-impregnated paper is applied to the back surface of the veneer, it is not necessary to use a special adhesive between the decorative material base material and the veneer.

[0013] In addition to the aforementioned thermosetting resin-impregnated paper, the decorative material base material laminated on the back surface of the veneer may be
For example, woody base materials such as wood, plywood and particle board, gypsum base materials such as gypsum board and gypsum slag board, fiber cement boards such as pulp cement board, asbestos slate board, asbestos cement board and wood chip cement board, GRC A metal foil or sheet made of concrete, iron, aluminum, copper, or the like, or a composite sheet obtained by combining two or more of these can be used. When a decorative material substrate other than the above-described resin-impregnated paper is used, the decorative material substrate and the veneer are, for example, vinyl acetate, ethylene / vinyl acetate, urethane, epoxy, Adhered with urea-based, acrylic-based, rubber-based adhesives, etc.

The transparent or translucent thermoplastic resin film placed on the surface of the veneer via a transparent or translucent hot-melt type adhesive layer is colorless or gravure, offset, letterpress, silk screen, etc. Any of a film having a pattern printing layer or a transparent coloring printing layer formed by front printing or back printing may be used, and may have a thickness of 0.03 to 1.0 mm, preferably 0.1 to 0.
Thermoplastic resin film of about 5 mm, for example, polyvinyl chloride, ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, polyethylene, polypropylene, polyvinylidene chloride, polyethylene terephthalate, polycarbonate, polyamide, polystyrene, polyvinyl alcohol, etc. Is used.

In order to improve the surface properties, etc.,
A composite sheet obtained by doubling another thermoplastic resin film, a composite film provided with a resin coat layer, and the like are also used.In particular, coloring, formation of a print layer, formation of a surface protective layer, and the like are easy, and A polyvinyl chloride film having a thickness of about 50 to 300 μm is preferable from the viewpoint that bending workability can be obtained.

A transparent or translucent thermoplastic resin film which is brought into contact with the surface of the veneer via a transparent or translucent hot-melt type adhesive layer, as a pattern printing layer which matches the grain of the veneer. When using a resin film that is formed by front-side printing or back-side printing, the natural woodgrain design by the veneer and the design of the printing layer in the thermoplastic resin film described above are synergistic,
For example, in the case of a veneer made of inexpensive wood, a high-grade feeling can be given, and in the case of a veneer made of high-grade wood, there is an advantage that a more luxurious feeling is given.

A transparent or translucent thermoplastic resin film having a surface protective layer of a curable resin used in the invention of claim 2 is formed on the side opposite to the surface to be bonded to the veneer. For example, a cured layer made of a thermosetting resin or an ionizing radiation curable resin having a thickness of 0.5 to 200 μm, preferably about 1.0 to 100 μm.

This surface protective layer is formed on the surface of a transparent or translucent thermoplastic resin film by, for example, roll coating,
Curtain flow coat, wire bar coat, reverse roll coat, gravure coat, gravure reverse coat, air knife coat, kiss coat, blade coat,
The coating layer formed by smooth coating, comma coating, rod coating, spray coating, offset gravure coating, or the like is formed by heat curing or ionizing radiation curing. In addition, the accuracy of the thickness of the coating layer,
A coating method using gravure coating, reverse roll coating, offset gravure coating, or the like is preferred because the coating layer has excellent surface smoothness and the like.

The coating layer may be cured by ionizing radiation by, for example, irradiating a light source with ultraviolet light from an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a black light lamp, a metal halide lamp, or a Cockloft-Walton type. , Handicap type, resonant transformer type,
100 to 1000 Ke by various electron beam accelerators such as insulating core transformer type, linear type, dynamitron type, high frequency type
V, preferably by irradiation with an electron beam having an energy of 100 to 300 KeV.

As the surface protective layer made of the ionizing radiation-curable resin, a mixed resin composition of a prepolymer, oligomer, and / or monomer having a polymerizable unsaturated bond or an epoxy group in a molecule is used.

Specific examples of the prepolymers and oligomers include unsaturated polyesters such as condensates of unsaturated dicarboxylic acids and polyhydric alcohols, polyester methacrylates, polyether methacrylates, polyol methacrylates, and melamine methacrylates. Methacrylates, acrylates such as polyester acrylate, epoxy acrylate, urethane acrylate, polyether acrylate, polyol acrylate, and melamine acrylate are used. Further, specific examples of the monomer include styrene-based monomers such as styrene, α-methylstyrene, methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate, butoxyethyl acrylate, butyl acrylate, and acryl. Acrylates with methoxybutyl acrylate, phenyl acrylate, etc., methacrylates with methyl methacrylate, ethyl methacrylate, propyl methacrylate, methoxyethyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate, etc., acrylic acid-2 -(N, N-diethylamino) ethyl, 2- (N, N-dimethylamino) ethyl methacrylate, 2- (N, N-dibenzylamino) ethyl acrylate, 2- (N, N -Dimethylamino) methyl, acrylic acid-2- Substituted amino alcohol esters of unsaturated acids with N, N-diethylamino) propyl, etc., unsaturated carboxylic acid amides with acrylamide, methacrylamide, etc., ethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, 1,6 -Diacrylate compounds such as hexanediol diacrylate, diethylene glycol diacrylate, and triethylene glycol diacrylate; polyfunctional compounds such as dipropylene glycol diacrylate, ethylene glycol acrylate, propylene glycol dimethacrylate, and diethylene glycol dimethacrylate; trimethylolpropanetri Thioglycolate, trimethylolpropane trithiopropylate, pentaerythritol Rutetorachioguri
R> a polythiol compound having two or more thiol groups in a molecule by Cole or the like. In the case of a surface protective layer made of an ionizing radiation-curable resin, usually, a mixed composition of 5 to 95% by weight of the above prepolymer or oligomer and 95 to 5% by weight of a monomer and / or polythiol compound. Things are used.

The surface protective layer made of the ionizing radiation-curable resin is preferably made of a methacrylate-based resin or a urethane acrylate prepolymer since the embossing formed on the surface protective layer becomes faithful to the unevenness of the embossing plate. Is preferred.

Further, when the surface protective layer of the ionizing radiation-curable resin is cured by irradiation with ultraviolet rays, for example, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime ester,
A photopolymerization initiator such as tetramethylmeuram monosulfide and thioxanthone; and a photosensitizer added as necessary, for example, a photosensitizer such as n-butylamine, triethylamine, tri-n-butylphosphine, and the like. Is of course added.

A transparent or translucent hot-melt type adhesive layer is interposed between the veneer and the transparent or translucent thermoplastic resin film laminated on the surface of the veneer. The adhesive strength between the thermoplastic resin film and the thermoplastic resin film is increased, and the concavities and convexities of the embossing plate are faithfully reproduced, and the embossed concave portion having a sufficient depth is formed.

The transparent or translucent hot-melt type adhesive layer interposed between the veneer and the transparent or translucent thermoplastic resin film laminated on the surface of the veneer may be made of, for example, ethylene / vinyl acetate copolymer. Merging, polyvinyl acetate, vinylidene chloride copolymer, polyvinyl acetal,
It is made of polyvinyl butyral, polyolefin, polyester, or the like, and is applied by, for example, an extrusion coating method or the like, and an anchor surface is applied to an adhesive surface as needed.

Since the transparent or translucent adhesive layer interposed between the veneer and the transparent or translucent thermoplastic resin film laminated on the surface of the veneer is a hot melt type adhesive layer. In addition, the flow of the adhesive layer in the hot pressing process is improved. Thus, the shape of the concave portion formed by the convex portion of the embossing plate in the hot press process becomes faithful. This is remarkable when the thickness of the transparent or translucent thermoplastic resin film laminated on the veneer is large, or when the embossed concave portion having a large depth is formed.

In the case of an embossing plate that comes into contact with the surface of the transparent or translucent thermoplastic resin film, that is, in the case of a thermoplastic resin film having a surface protective layer, it comes into contact with the surface of the surface protective layer of the thermoplastic resin film. The embossing plate to be used is, for example, an embossing plate having irregularities by an etching method, an electroforming method, or the like, a mat finish embossing plate, or the like.

In the method of the present invention, a transparent or translucent thermoplastic resin film and a transparent or translucent hot melt type adhesive layer are provided on the surface of a veneer or a veneer having a backing material laminated on the back surface. In the state where the transparent or translucent thermoplastic resin film surface is in contact with an embossing plate having irregularities, the condition of the heat pressure when hot-pressing this between hot plates is as follows: It is determined according to the type of the veneer to be interposed, the type of the thermoplastic resin film, the type of the hot melt type adhesive layer interposed between the veneer and the thermoplastic resin film, and the like.

At the time of this hot pressing, air pockets are not generated in the concave portions on the surface of the veneer plate, and faithful concave portions corresponding to the convex portions of the embossing plate are sharply formed on the surface. So-called hot-cold molding, in which the adhesive strength between the thermoplastic resin film and the like is sufficient, and then cooling while applying pressure after hot pressing, that is, a veneer, a transparent thermoplastic resin film, and an embossed plate Is preferably heated and pressed between hot plates, cooled to room temperature while maintaining the pressurized state, and then the embossing plate is removed.

[0030]

According to the method of the present invention, a transparent or translucent thermoplastic resin film and a transparent or translucent hot melt type adhesive layer are formed on the surface of a veneer or a veneer having a backing material laminated on the back surface. In the state where the embossing plate having irregularities is brought into contact with the transparent or translucent thermoplastic resin film surface, the hot-melt type adhesive is pressed by hot pressing between the hot plates. While the layer is made to flow, it consists of forming a concave portion reaching from the transparent or translucent thermoplastic resin film surface to this adhesive layer, without performing complicated painting repeatedly, and in a separate step. Without embossing process, the shape is faithful to the convex part of the embossing plate, and the embossed texture and the deep coating of the concave and convex due to the deep concave part Veneer with a door is obtained.

In the method of the present invention, the veneer adhered to a predetermined base material can be used as a hot-pressed material, and can be finished in a sheet shape. It can be used as a surface cosmetic material to be obtained.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete structure of a method for producing a veneer having an embossed texture by irregularities and a deep coating feeling according to the present invention will be described below with reference to examples.

[Example 1] In FIG.
2mm vinyl chloride resin film "RIKEN VINYL INDUSTRY
Co., Ltd .: After forming a coating layer of UV curable resin "Dainichi Seika Co., Ltd .: SEIKA BEAM XD-520" on the surface of "W-500" 2, this is cured by irradiation with ultraviolet light, and the curable resin is used. A transparent thermoplastic resin film having the surface protective layer 3 was obtained.

Subsequently, a hot-melt type adhesive “Takeda Pharmaceutical Co., Ltd .: Takemelt” is applied to the back surface of the transparent thermoplastic resin film 2 made of the vinyl chloride resin film, and an adhesive having a thickness of 100 μm is applied. Layer 4 was formed.

On the other hand, a backing material 6 made of a nonwoven fabric having a basis weight of 40 g / m ² "Toray Co., Ltd .: Axter" is coated on the back surface of a veneer 5 made of oak material having a thickness of 0.15 mm with an emulsion adhesive "Chuo Rika Kogyo Co., Ltd." Co., Ltd .: Attached using AC-500 "7.

Thereafter, a transparent thermoplastic resin film 2 made of a vinyl chloride resin film having a surface protective layer 3 made of a curable resin is placed on the surface of the veneer 5 to which the backing material 6 is adhered. 5 and the hot-melt type adhesive layer 4 on the back surface of the transparent thermoplastic resin film 2 are overlapped so as to be in contact with each other. A metal embossing plate having a tone-like unevenness is overlaid, and then a cushion material is abutted thereon and below, and heated at 135 ° C. and 50 kg / cm ² between the upper and lower press hot plates. And hot pressing for 15 minutes under pressure conditions.

Next, the laminate is cooled to room temperature while maintaining the above-mentioned pressurized state, the pressure is released, and the laminate is taken out from the press machine. From the veneer 1 having texture and deep painting feeling, that is, from the surface protective layer 3 on the surface of the transparent thermoplastic resin film 2 to the thermoplastic resin film 2 to the hot melt type adhesive layer 4 A veneer plate 1 having an embossed texture due to the unevenness caused by the reaching concave portion and a deep coating feeling was obtained.

[0038]

According to the present invention, a transparent or translucent thermoplastic resin film is provided on the surface of a veneer or a veneer having a backing material laminated on the back surface, and a transparent or translucent hot melt type adhesive layer. After pressing the embossing plate having irregularities on the transparent or translucent thermoplastic resin film surface, and then pressing it between hot plates, the hot melt type adhesive Along with flowing the layer, a concave portion extending from the transparent or translucent thermoplastic resin film surface to the adhesive layer is formed, and the concave portion having a shape faithful to the convex portion of the embossing plate and having a depth is formed. The veneer having the embossed texture of the concavo-convex pattern and the deep coating feeling can be accurately manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional end view schematically showing a laminated state of a veneer having an embossed texture due to unevenness and a deep coating feeling obtained by a method according to one embodiment of the present invention.

[Explanation of symbols]

1: Veneer having embossed texture due to unevenness and a deep painting feeling 2: Transparent thermoplastic resin film 3: Surface protective layer 4: Hot-melt type adhesive layer that is transparent or translucent 5: Veneer 6: Back Upholstery

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B32B 1/00-35/00

Claims (2)

(57) [Claims] 1. A transparent or translucent thermoplastic resin film and a transparent or translucent hot melt tie on the surface of a veneer or a veneer having a backing material laminated on the back surface.
Placed through the adhesive layer of the flop, further wherein a transparent or conditions the embossing plate having an uneven thermoplastic resin film surface of the translucent was abutment, which hot-pressing at hot plate
Fluidizes the hot melt type adhesive layer.
And the transparent or translucent thermoplastic resin
Method for producing a veneer and a coating sense of embossing texture and depth due to the unevenness, wherein the this <br/> forming recesses extending from Lum surface to the adhesive layer. 2. The transparent or translucent thermoplastic resin film has a surface protective layer made of a curable resin on the surface of the film. A method for producing a veneer having: