JPH05318992A - Woodgrained embossing plate, its manufacture, and woodgrained decorative sheet - Google Patents

Abstract

PURPOSE:To provide a woodgrained embossing plate which repersents sharply a woodgrained fibrous material, a manufacturing method for obtaining easily the woodgrained embossing plate, and a woodgrained decorative sheet wherein details of the fibrous material or the like are sharply represented. CONSTITUTION:An embossing plate 1 is constructed as follows; a parallel line group line groove 3 of 1-50mum in a width of a depressed part, 1-50mum in an interval of the depressed part, and 0.5-30mum in a depth of the depressed part is provided on all surfaces or partially by a mechanical engraving; thereafter, the depressed part 4 corresponding to a surface irregularity which a natural graining has is formed so that a flow direction of the woodgrain becomes a line direction of the abovementioned parallel line group like groove. An irregularity corresponding to the surface irregularity shape of the embossing plate is formed on a surface of a decorative sheet base material to make a woodgrained decorative sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a woodgrain embossing plate, a method for producing the woodgrain embossing plate, and a woodgrain decorative material such as a decorative sheet which is a product manufactured using the woodgrain embossing plate.

[0002]

2. Description of the Related Art In order to give a natural wood-like texture by sticking to the surface of building materials, furniture, etc., the surface of the base material is provided with irregularities on the surface of natural wood or a pattern of wood grain is formed by printing. The sheet is widely used as a woodgrain decorative sheet. Conventionally, as a method for producing a woodgrain decorative sheet having this wood grain unevenness, a method using an embossed plate formed with unevenness corresponding to the surface unevenness of the wood grain decorative sheet, and obtaining the uneven shape of the embossed plate on the surface of the base material It has been known.

In order to bring the design of this decorative material closer to the tone of natural wood grain, for example, in order to reproduce fine irregularities such as natural wood grain conduits and annual ring patterns on the surface of the embossed plate,
Using photographic film, etc. that took natural wood grain as the original plate,
A method is used in which a resist layer is formed on the surface of a plate material of an embossed plate and then the plate material is etched to form an uneven pattern.

[0004]

However, when the embossing plate is manufactured by the above-mentioned conventional method, it is difficult to accurately form the concave shape into a desired shape because side etching occurs in the etching process. , There was a problem that it was not possible to delicately express the fine line part. In order to solve such a problem, there is a so-called two-step etching method in which the etching is divided into two steps. However, since the shape in the depth direction cannot be arbitrarily controlled by etching, the fiber quality of the wood grain is sharp. It was difficult to express. Therefore, in the conventional woodgrain embossed plate, there is no one in which the fiber quality of the wood grain is sharply expressed, and there is no one in which the fine line of the fiber quality is sufficiently expressed even in the woodgrain tone decorative material.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and a wood grain embossing plate in which the fiber quality of wood grain is sharply expressed and a manufacturing method for easily obtaining the wood grain embossing plate, Another object of the present invention is to provide a woodgrain decorative material in which details such as fiber quality are sharply expressed.

[0006]

In the woodgrain embossing plate of the present invention, the width of the recesses is 1 to 50 μm and the interval between the recesses is 1 to 50 μm.
m, and the parallel line group grooves having a depth of the recess of 0.5 to 30 μm are formed entirely or partially on the surface of the plate material by mechanical engraving, laser engraving, or electron beam engraving, and then natural wood grain is formed on the surface of the plate material. It is characterized in that the concave portions corresponding to the surface irregularities of are formed so that the flow direction of the wood grain is the line direction of the parallel line group grooves.

In the method for producing a woodgrain embossing plate of the present invention, parallel line group grooves having a recess width of 1 to 50 μm, a recess interval of 1 to 50 μm and a recess depth of 0.5 to 30 μm are formed on the surface of the plate material. It is characterized in that after being provided entirely or partially by mechanical engraving, laser engraving, or electron beam engraving, recesses corresponding to the surface irregularities of the natural wood grain are formed on the surface of the plate material by etching.

The wood grain decorative material of the present invention has a concave width of 1 to 50.
μm, the interval between the recesses is 1 to 50 μm, the depth of the recesses is 0.5 to
After forming parallel line group grooves of 30 μm on the surface of the plate material by mechanical engraving, laser engraving, or electron beam engraving, the concave portions corresponding to the surface irregularities of the natural grain are parallel to the flow direction of the grain. It is characterized in that an embossing plate formed so as to be in the line direction of the line group groove is used, and unevenness corresponding to the surface unevenness of the embossing plate is formed on the surface of the decorative material base material.

[0009]

The present invention will be described in detail below with reference to the drawings.
The drawings show examples of the present invention, and FIG. 1 is an explanatory view showing an example of a method for producing an embossing plate of the present invention.

The embossing plate 1 of the present invention is as shown in FIG.
On the surface of the plate material 2, parallel line group grooves 3 having a width W of the recesses of 1 to 50 μm, an interval K of the recesses of 1 to 50 μm and a depth D of the recesses of 0.5 to 30 μm [FIG. As shown in FIG. 3C, the recesses 4 corresponding to the surface irregularities of the natural wood grain board are formed on the parallel line group grooves 3.

To manufacture the embossing plate 1 of the present invention, first, the parallel line group grooves 3 are formed by mechanical engraving, electron beam engraving, or laser engraving. In the case of mechanical engraving, engraving with a cutting tool can be performed, and the material of the cutting tool can be selected from known materials such as diamond (gold stone) and special steel, and the shape of the tip of the cutting tool can be arbitrarily selected. The cross-sectional shape of the cutting tool is preferably a semicircle, a semi-ellipse, an isosceles triangle, or the like in terms of design. Further, in the case of a cylindrical plate material, mechanical engraving can be performed by engraving with a lathe. Further, in the case of laser engraving, a desired portion of the plate material 2 is evaporated by the thermal energy generated by the focused laser light. As the laser light source, carbon dioxide laser, YAG
Select an appropriate output and type from high-power lasers such as lasers and ruby lasers according to the application. To engrave the parallel line group grooves, the plate material 2 is fixed and the focused laser beam is scanned, or the plate material 2 is moved with respect to the fixed focused laser beam. And (in the case of a cylindrical plate material, for example, while rotating around the shaft, feed in the axial direction),
A groove as shown in FIG. 2A is engraved.

The plate material 2 may have either a flat plate shape or a cylindrical shape (cylindrical shape), and the material thereof is a metal such as iron or copper. Further, a hollow iron core or the like whose surface is plated with copper may also be used.

FIG. 2 is an explanatory view schematically showing an example of parallel line group grooves, and the parallel line group grooves 3 when a cylindrical plate material is used, for example, as shown in FIG. For example, a spiral continuous straight line may be used, or a discontinuous line group may be formed so that one line is formed on one circumference as shown in FIG.

Next, an uneven portion 4 corresponding to the uneven surface of the wood grain board is formed from above the parallel line group grooves.
The concave portions 4 on the plate surface have the same shape as the concave and convex portions of the final product, that is, the decorative material, and have reverse concave and convex portions. The parallel line group groove 3 is shown in FIG.
As shown in (c), the lines of the parallel-line group groove 3 with respect to the flow direction X of the convex portion 4 (that is, the concave portion on the decorative material) corresponding to the irregularities of the natural wood grain on the plate surface. Direction
Form so that they are in the same direction. In the present invention, only the concave portion on the plate surface corresponding to the convex portion of the decorative material is processed by the photo-corrosion method or the like. The convex portion on the plate surface corresponding to the concave portion of the decorative material is in a state where the parallel line group grooves 3 are formed.

The convex portions 4 on the plate surface include, for example, the following. Conduit groove, spring material with uneven surface of floating wood grain board, which leaves hard autumn parts of annual rings as convex parts by polishing process, and soft spring parts are made into concave parts.

As a method of forming the concave portion 4 on the plate surface which should correspond to the convex portion of the natural wood grain, the following means can be mentioned. 1) Extracting only the concave-concave-shaped portion on the plate surface as a photographic original plate (by a known photoengraving method such as printing engineering processing, manual correction, digital image processing), and a known photocorrosion method on the surface of the plate material. 2) A concave part is formed on the surface of the natural wood grain board with a silicone resin or the like, a mill is formed by electroforming based on the mold, and parallel line group grooves are formed on the surface using the mill. A well-known electroforming mill method for forming recesses on the surface of a plate material by milling 3) Others

FIG. 1 shows an example of the photocorrosion method of 1) above. As shown in FIG. 4B, a resist layer 5 is formed, the dotted line portion 6 is removed by etching, and the resist layer 5 is peeled off to obtain a woodgrain embossing plate 1 [FIG. .. The wood grain embossing plate in which the surface unevenness of the wood grain board is formed on the surface of the plate material in which the parallel line group grooves 3 are formed can be used as it is, and the surface is further plated with chrome as a protective layer. Etc. may be applied to form the plating layer.

FIG. 3 is a cross-sectional view of an essential part showing an example of a decorative material manufactured using the embossing plate of the present invention. The wood grain decorative material 10 of the present invention uses the above-mentioned wood grain embossing plate to shape the surface shape of the embossing plate on the surface of the decorative material substrate 11 as shown in FIG. Are formed.

Well-known embossing is used as a means for forming an uneven shape corresponding to the surface uneven shape of the embossing plate on the surface of the decorative material substrate. This is a method of forming an uneven shape of an embossing plate on the surface of the decorative material base material 11 by heat or pressure, and a press embossing machine such as a flat plate press or a roll embossing machine is used. In the roll embossing method, the unevenness of a cylindrical embossing plate is shaped by heat and pressure. The heating and pressurizing conditions of the material differ depending on the thermocompressive behavior of the substrate, but in the case of ordinary thermoplastic resins, the embossing plate is heated to an appropriate temperature between the softening point or heat distortion temperature and the melting point or melting temperature. Press to shape and then cool to fix the shape. As a heating method, known methods such as infrared irradiation, warm air blowing, heat conduction from a heating roller, and dielectric heating are used.

The wood grain decorative material of the present invention may be formed by providing a printed pattern 14 as shown in FIG. 3 or by bonding a decorative material base material to another base material 12 or the like.

Examples of the base material for the decorative material include thermoplastic resin such as polyvinyl chloride, acryl, polypropylene, ABS, polystyrene, and thermosetting resin-impregnated paper.

As the thermosetting resin for the impregnated paper, melamine resin, diallyl phthalate resin, guanamine resin, polyester resin, phenol resin and the like are used. The processing method is, for example, when diallyl phthalate resin-impregnated paper is used, the thermosetting resin-impregnated paper is sequentially stacked on the plate-shaped substrate, and the conditions are 140 to 150 ° C., 15 kg / cm ² , and about 10 minutes. It is manufactured by heating and pressing.

Next, the present invention will be described in more detail with reference to specific examples of the present invention. [Example 1] First, a spiral parallel line-shaped groove was machine-engraved on the surface of a cylinder roll having a circumference of 620 m / m in which a copper plating layer having a thickness of 3 m / m was applied to the surface of a cylindrical iron core. 60
It was provided at intervals of μm. The parallel-line group groove has a semicircular cross section as shown in FIG. 1, and D = 20 μm, W = 40 μm, K = 2.
It was 0 μm. Next, after coating and forming a negative photosensitive resist layer on the entire surface of the cylinder roll in which the spiral parallel line group grooves are formed, a pattern photo master plate for etching of a floating cedar wood grain pattern (annual ring pattern The autumn material part is exposed to light and developed, and all the parts except the autumn material part are coated with resist, and then etched with ferric chloride to a depth of 100 μm for etching to remove the resist layer and further to the surface. As a protective layer, chromium plating was applied to a thickness of 6 μm to obtain a wood grain embossing plate.

[Example 2] A colored vinyl chloride sheet (Riken Vinyl Industry: W-500) having a thickness of 0.1 m / m and having a wood grain pattern formed by gravure printing on a surface, and a transparent vinyl chloride sheet (Riken Vinyl Industry: W-500) was laminated and doubling embossing was performed using the wood grain embossing plate of Example 1 to form wood grain unevenness on the surface, and then wiping processing was performed on the recessed portion to obtain a wood grain decorative sheet. The obtained woodgrain decorative sheet had realistic wood grain unevenness in which even fine line parts such as fiber of wood grain were sharply expressed.

[0025]

As described above, in the wood grain embossing plate of the present invention, the concave portions of the thin parallel line group grooves are formed by mechanical engraving, laser engraving, or electron beam engraving, and then the concave portions corresponding to the natural grain are formed. By adopting a configuration in which the flow direction of (3) is provided in the line direction of the parallel line group groove, the fiber material of the wood grain is expressed by the parallel line group groove, and the thin line portion is sharply expressed. Further, according to the method for manufacturing a woodgrain embossing plate of the present invention, it is possible to easily and reliably manufacture the embossing plate in which even the fine line portion is sharply expressed. Especially the conventional 2
Compared with the step etching method, the fine line portion can be expressed finely without being crushed by the side etching. INDUSTRIAL APPLICABILITY The wood grain decorative material of the present invention is excellent in design because the fine line portion such as the fiber material of the wood grain is sharply expressed and has a realistic texture of the wood grain.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a method for producing a woodgrain embossing plate of the present invention.

FIG. 2 is an explanatory diagram showing an aspect of an embossing plate that schematically shows parallel line group grooves.

FIG. 3 is a sectional view of an essential part showing an example of a wood grain decorative material of the present invention.

[Explanation of symbols]

1: Wood grain embossing plate 2: Plate material 3: Parallel line group grooves 4: Recesses corresponding to unevenness of natural wood grain 10: Wood grain decorative material 11: Decorative material base material 13: Embossed plate surface shape Uneven pattern of wood grain

Claims (3)

[Claims] 1. The width of the recesses is 1 to 50 μm, and the interval between the recesses is 1.
After forming parallel line group grooves having a depth of ˜50 μm and a recess depth of 0.5 to 30 μm on the surface of the plate material by mechanical engraving, laser engraving, or electron beam engraving, the surface of the plate material is natural. A wood grain embossing plate, characterized in that recesses corresponding to the surface irregularities of the wood grain are formed such that the flow direction of the wood grain is the line direction of the parallel line group grooves. 2. The width of the recesses is 1 to 50 μm, and the interval between the recesses is 1.
After forming parallel line group grooves having a depth of ˜50 μm and a recess depth of 0.5 to 30 μm on the surface of the plate material by mechanical engraving, laser engraving, or electron beam engraving, the surface of the plate material is natural. A method for producing a woodgrain embossing plate, characterized in that a concave portion corresponding to the surface unevenness of the wood grain is formed by etching. 3. The width of the recesses is 1 to 50 μm, and the interval between the recesses is 1.
〜50μm, 0.5 ~ 30μm deep recessed parallel line group groove on the surface of the plate material by mechanical engraving, laser engraving, or electron beam engraving on the whole or part, then the surface irregularities of the natural wood grain Using an embossing plate formed by forming the corresponding recesses so that the flow direction of the wood grain is the line direction of the parallel line group-like groove, the unevenness corresponding to the surface unevenness of the embossing plate is formed on the surface of the decorative material substrate. A wood grain decorative material characterized by being shaped.