JP3162170B2 - Cosmetic material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material, and more particularly to a decorative material capable of expressing the "shine" of natural wood.

[0002]

BACKGROUND OF THE INVENTION Natural wood has an inherent luster, or "shine". It is made of cells that are stacked in parallel on wood, and when it is scraped with a plane, a concave inner surface group appears inside the cells, giving each cell a luster like a small concave mirror It is said to be good.
1a and 1b schematically show the state, and FIG.
When light is applied in parallel to the fiber 10 as described above, much of the light that has entered the cell comes out as specular reflection (mirror reflection), whereas when light enters the fiber at right angles. As shown in FIG. 1b, light is scattered on the cell side wall, and strong reflection does not occur. In other words, the part that illuminated (brightly lit) when light was applied to the wood surface is the part that reflects light, that is, the direction in which the light is applied and the direction of the wood fiber are aligned. ,
In addition, a portion where no light is generated (shadowed darkly) is irregularly reflected in the cell, that is, a portion in which the direction of light is different from that of the fiber.

[0003] Generally, in wavy grain and around nodes,
Because the wood fiber draws a complicated curve, the brightly lit part and the darkly shaded part slightly change due to a change in the light incident direction or a change in the position of the viewer, The characteristic shine of each piece of wood is exhibited, and the viewer is given a sense of movement of "shine". When creating a decorative material with a wood grain pattern, it is difficult to express such shine on a normally printed wood grain pattern, which makes it difficult for viewers to use natural wood and printed wood grain patterns. It is considered that it gives an unconscious distinction between the material and the cosmetic material.

[0004]

Efforts have been made to provide a decorative material having a wood grain print pattern with the above-described expression of shine to give a sense of sensation close to that of natural wood. For example, there is a method of printing using a glossy printing ink (pearl ink or the like), or a method of forming an embossed concavo-convex pattern composed of a pattern of parallel curves on a transparent resin sheet and laminating it on a substrate. (Japanese Unexamined Patent Publication No.
-175742). In the former case, in the specific direction (angle), the entire surface is illuminated, but in the other direction, no illumination is generated. There are places where shine does not occur and places where no shine occurs, and so-called illuminating movement feeling that the illuminated pattern changes due to the difference in the viewing direction or the direction of light, and the illuminated pattern does not occur. Things. In the latter case, a certain degree of shimmer can be expressed with respect to so-called vertical shimmer, such as Lauan and Mahogany, in which glossy stripes are substantially parallel to the direction of the annual ring pattern of the grain (hereinafter referred to as the direction in which the grain runs) in the present invention. However, the direction in which the glossy stripes are almost perpendicular to the direction of the annual ring pattern of the wood grain In other words, it is not possible to express shine (horizontal shine) in the direction perpendicular to the direction in which the wood grain runs, and depending on the type of wood, shine close to natural wood Was difficult to express.

[0005] That is, it is said that the cross grain and the wavy grain are deeply related to the visual characteristics of the surface of the wood, of which the fiber is meandering in a wavy manner. Thus, it is formed at a position where the fiber is obliquely cut on the surface of the material, and shine occurs as a light and shade pattern (wavy heather) in the lateral direction, and the movement of the shine is given to the viewer. However, as described above, the conventional ones are particularly insufficient in the expression of this side-light, and show a specific side-light such as maple, satin wood, sapele, bubinka, horse chestnut, maple, ash, hippo, onigiri, etc. It was not possible to make a decorative material with a wood grain pattern.

The present invention makes it possible to feel a cosmetic material having an expression of shine close to that of natural wood, and in particular, to those who see the lateral shine of natural wood and the feeling of movement thereof, which could not be solved by the conventional techniques as described above. The purpose is to obtain a cosmetic material that can be obtained.

[0007]

In order to achieve the above-mentioned object, the present invention provides at least a wood grain print pattern and an embossed concavo-convex pattern consisting of a group of wavy curves on a base sheet. Disclosed is a decorative material characterized in that the running direction of the annual ring pattern of the wood grain and the running direction of the wavy curve group are the same. The wood grain print pattern and the embossed concavo-convex pattern consisting of a group of wavy curves may be formed on different base sheets and laminated on each base sheet, or may be formed on the same base sheet. Good thing.

As the base sheet, any transparent or translucent sheet can be used without any particular limitation. Cellophane, acetate, polyethylene, polypropylene, polyester,
Polyvinyl chloride, polyvinylidene chloride, polystyrene,
Those made of polycarbonate, polyvinyl alcohol, polyamide and the like can be used. Any method known in the art for printing a grain pattern on a substrate sheet is known in the art, for example, Japanese Patent Application Laid-Open Nos.
For example, a method described in JP-A-64443 can be used.

The embossed concavo-convex pattern consisting of a group of wavy curves may be processed on the printed surface of a substrate sheet on which a wood grain pattern is printed.
As disclosed in Japanese Unexamined Patent Publication No. 7-1995, the surface may be processed on the side opposite to the printing surface. Also, as disclosed in Japanese Unexamined Patent Application Publication No. 4-64443, which is assigned to the same applicant as the present applicant, another base sheet having a grain pattern printed thereon is prepared and embossed thereon. After that, both sheets may be laminated via an appropriate bonding means. A glittering solid printing layer can be formed on the printing surface of the wood grain pattern or the surface on which the embossed uneven pattern is processed.

The embossed concavo-convex pattern composed of a group of wavy curves serves as an element for expressing the above-mentioned shine and the feeling of movement of the shine, but the group of wavy curves has a width d of the concave portion as shown in FIG.
It is preferable that the convex and concave portions have a concavo-convex shape having a width d ₂ of ₁ to 1000 μm, and these curve groups are formed by connecting plural curve units such as a sine wave curve, a cycloid curve, and an arc in parallel. Although a moving arrangement is typical, it is preferably a computerized device such as an xy plotter which is patterned as a group of mathematically expressed curves (that is, as a group of curves in which function parameters of a function curve are sequentially changed). Is used as a group of curves that can be drawn. The group of wavy curves drawn in this manner is used as an original plate, and an embossed plate is created by a usual method, for example, by corroding a copper plate using a photo-etching method. The shape of the plate may be flat or cylindrical.

Using the embossing plate, a continuous embossed pattern consisting of a group of wavy curves is processed on the above-mentioned base sheet. In the present invention, when processing the embossed pattern, the processing is performed such that the running direction of the grain of the wood grain print pattern and the running direction of the wavy curve group are substantially the same direction (see FIG. 6, where M is The wood grain pattern E indicates embossed pattern irregularities, and both of them run vertically in the figure). If the base sheet on which the grain pattern is printed is different from the base sheet on which embossing is performed, sufficient care should be taken so that the running direction of the grain after lamination is the same as the running direction of the group of wavy curves. Pay.

The following sinusoidal function curve can be given as an example of a preferred embodiment of a wave-like curve group which can be patterned by using a computer and plotted as a set of mathematically formed (functionalized) curves. That is, assuming that the amplitude is A, the wavelength is λ, and the phase is α, two sine waves represented by formulas in which one or more of the function parameters, amplitude, wavelength, and phase, and the Y-axis intercept are different. Wavelength difference of the curve,
It is composed of (n + 1) curves shown when i of a curve represented by an equation obtained by dividing the difference between the phase difference, the period difference, and the Y coordinate difference into n equals 0, 1,..., N-1, n. Such a curve group. FIG. 7 shows an example of a top view of the concavo-convex pattern obtained by embossing the curve group, and FIG. 4B is an enlarged perspective view of a part thereof.

X _O = A _O sin (2π / λ _O ) y... X _n = A _N sin (2π y / λ _N + α) + Δx... X _i = ((A _n −A _O ) i / n + A _O ) sin ｛ ((2π / λ _N -2π / λ _O ) i / n + 2π / λ _O ) y + αi / n｝ + Δxi / n The reason why such a curve group is preferable is as follows. That is, as shown in FIG. 3A, the surface of the natural woodgrain board is AA ′ in the x-axis direction of the board plane as shown in FIG. 3A.
Fig. 3 shows the optical reflection density change measured by scanning in the direction
Like b, it is represented as a function D (x) of x,
(X) is subjected to Fourier transform to obtain a spatial frequency spectrum P
(F) It is known that, when (f is a spatial frequency), a curve approximated by 1 / f (FIG. 3c) is obtained, while the time-frequency spectrum of the electrocardiogram waveform is also approximated by 1 / f. It is also known to be done. Therefore, natural wood grain patterns are more familiar to people's hearts than simple geometric patterns such as stripes, are preferred, and do not feel uncomfortable.
It is thought to be because it is in harmony with the rhythm of the ecology such as the electrocardiographic waveform having an f-type spectrum (Reference: World of Fluctuations, Toshimitsu Musha, Kodansha Co., Ltd.).

Therefore, in order to reproduce the “shine” that is familiar to the mind of the user and closer to a natural tree in the present invention,
Curve shape (period, amplitude,
It is a very preferable embodiment to modulate the phase) and the interval between the grooves so that the spatial frequency spectrum intensity P (f) of the curve group approximates 1 / f or 1 / f.

Hereinafter, some examples of specific techniques for achieving this will be described as follows. [1] A curve group in which sine waves and x = Asin (ky + B) are arranged at equal intervals Δx in the x direction is drawn by a plotter using a computer (FIG. 4A). At this point, the width change Δw of each curve is set to 0. Next, as described with reference to FIGS. 3A to 3C, while scanning the surface of an appropriate natural woodgrain board (preferably one with a clearly visible annual ring pattern) in a specific direction (eg, the x ′ direction). , The interval Δx ′ _i between autumn wood parts having a high optical density of annual rings and the width ΔWx ′ _{i of} each autumn wood part are sequentially measured.

Next, the interval Δx _i between the curves of the curve group
Is modulated by the permutation of Δx ′ _i obtained by That is, Δx _i = αΔx ′ _i Δx, where i = 1, 2, 3,... Is the order in which the grain is scanned, α is an appropriate magnification, and is the same or the same for all i. [Delta] x _i of Te is set to be constant, for example, in the range 1 to 1000 m.

Further, the concave portion width Wb _i of the curve group is modulated by ΔWx ′ _i obtained by the above equation. That is, ΔWb _i = βΔWx ′ _i where i = 1, 2, 3,... Is the order in which the grain is scanned, β is a magnification common to all i, and ΔWb _i is within a certain range. It is set to be in the range of 1 to 1000 μm.

The above process is performed by a computer, and each of x _i ,
By calculating the values of Δx _i and ΔWb _i and outputting them by an xy plotter, the curve of FIG.
The output is as shown in FIG. [2], two sets of the sequence shown below (q _n , Q _n )
make.

[0019]

Here, n = 1, 2, 3,... Is a natural number,
p _j and P _j are different or the same random numbers, respectively, and p
_j, P _j generates a pseudo-random number, for example, a computer calculation. q _n, the curve interval [Delta] x _i and ΔWb in the Q _n (1)
_{As i} , a process similar to [1]-is performed to obtain a necessary figure.

That is, Δx _i = q _j ΔWb _i = Q _j . In this case, a curve group of 1 / f fluctuation can be obtained without performing the process of scanning the natural wood grain board as in [1].

[3] Since it is known that the time-frequency spectrum of the electrocardiogram waveform is also approximated by 1 / f as described above, the heart rate frequency obtained from the electrocardiogram is used (and, if necessary, After subtracting a number and emphasizing the wide and narrow spaces), the ΔT ' _i obtained therefrom is
The same calculation is performed using the value of Δx ′ _i in [1], and this is output by an xy plotter (see the above-mentioned reference).

Further, the wavy curve used in the present invention is:
It is not limited to a sine wave, and as described above, it is basically possible to use any bounded (variable in a finite range) curved and continuous curve. To further illustrate the example, the following can be mentioned. [1], a bounded curve (function curve in which f _i (x) has a finite value) and a certain period λ, that is, f _i (x +
λ) = curve that satisfies f _i (x). Specifically, the trigonometric function s
inx, cosx, cylindrical function Jn (x) of the first kind among Bessel functions, Jacobi elliptic function sn (x, k), cn
(X, k), dn (x, k), Legendre polynomial Pn
(X), Chebyshev polynomial Tn (x), other curves sinx / x, Jn (x) / x, and the like.

[0024] [2], unbounded curve (f _i (x) is at the value of x + - curve function which diverges to infinity) at and in the case of the periodic function, a section diverging A curve that is replaced (interpolated) by a bounded function curve only in a section including the value of x that is excluded or diverges. For example, among the Bessel functions, in the case of the second-type cylindrical function Yn (X) K, since x = 0, the divergence becomes negative infinity, so the interval [0, Δx] is removed and the remaining [Δx, infinity] (Δx is a minute amount).

When y = tanx, x = π / 2 + n
Since the light diverges at π, a certain section before and after [−π / 2−Δ
x, −π / 2 + Δx], [π / 2−Δx, π / 2 + Δ
x], [3π / 2−Δx, 3π / 2 + Δx],... are replaced with straight lines (see the solid line in FIG. 5). Further, in order to more smoothly connect the tanx and the linear portion, the vicinity of the intersection is further interpolated by a quadratic curve or a cubic curve (see an enlarged portion in FIG. 5).

And the like. In addition, even if it is a bounded curve, if the value is too large and it is inconvenient in terms of plate making dimensions or gloss appearance, such an inconvenient section is interpolated with a curve or a straight line having another appropriate value. Can also be used. For any such curves,
Modulation is appropriately performed in the same manner as described above, and 1 / f
It is possible and a preferable embodiment to make the spectrum fluctuate.

[0027]

The present invention will be described below in more detail with reference to examples.

[0028]

Embodiment 1 Plotter (Roland DEGITA)
L GROUP Co., Ltd .: DPX-3500)
A3 using a 0.18 mm thick film pen
Arbitrarily expressed by the following relational expressions (i) and (ii)
X-coordinate, wave for two sinusoidal curves and arbitrary y
Curve x that divides length difference, phase difference and amplitude difference into 200 equal parts₀, X
₁, ..., x₂₀₀(iii) Draw a curve group-1 consisting of
(Corresponding to curve group A on the right side of the diagram in FIG. 7). x₀ = 20 sin (y / 21-4) +6 sin (y / 5-3) (i) x₂₀₀= 22 sin (y / 24-3) +8 sin (y / 7-2) +200 (ii)

[0029]

Next, similarly, a curve group-2 (corresponding to curve group B on the left side of the diagram in FIG. 7) obtained by equally dividing a curve represented by the following equation (iv) into 200 in the x-axis direction is shown. Draw and connect to curve group-1. x ₄₀₀ = 24 sin (y / 23-1) +7 sin (y / 6-5) +400 (iv) Then, a continuous wavy curve group is drawn by drawing a curve in which curve group-1 and curve group-2 are connected alternately. Draw and draw this figure 25
% Of the original. In addition, it is preferable that the line is thinner than the diameter of the wood fiber in the drawing drawing by the plotter, but since the pen of the plotter has a limit of thickness and it is impossible to make it in fact, draw the whole larger and then reduce it by One line was close to the thickness of the wood fiber.

The copper plate was corroded from the above-mentioned original plate by a photo-etching method to obtain an embossed plate having a groove-like uneven pattern corresponding to a group of wavy curves of the original plate having a groove depth of 35 μm. A transparent vinyl chloride sheet (W-500, manufactured by Riken Vinyl Industry Co., Ltd., thickness: 0.1 mm) with a wood grain pattern printed on the back side. Vinyl sheet (manufactured by Riken Vinyl Industry Co., Ltd .: ST-)
11, the thickness of 0.05 mm) is laminated on the front side,
On the back side of the colored vinyl chloride sheet (opposite to the surface printed with pearl solid), the embossing plate is overlapped with the running direction of the grain pattern and the running direction of the grooved uneven pattern almost in the same direction, and then heated. Embossing was applied under pressure to obtain a decorative material.

The embossed decorative material was observed from different directions. When the decorative material shown in FIG. 7 was irradiated with light from different directions L and the decorative material was observed from the direction O opposite to the irradiated light, the light was irradiated as shown in FIGS. 8, a, b and c. The “shining” (brightly shining part) was different according to the difference in the direction, and it was possible to observe the movement of the side lighting similar to the shifting of the wavy grain of the natural board. In FIG. 8A, the “irradiation” portion when light is irradiated at an angle of 150 ° with respect to the y-axis is shown as a white field 1, and the other portions are shown as solid 2. FIG.
FIGS. 4B and 4C are diagrams showing a case where light is similarly emitted from directions of 90 ° and 30 °.

That is, among the uneven patterns on the surface of the decorative material,
An area where the incident direction of the irradiation light beam and the traveling direction of the groove of the concave and convex pattern coincide (or substantially coincide) with each other is a part of the illuminated portion 1 in which light is substantially regularly reflected
, And the other region is a shadowed portion 2 that hardly reflects light.

[0034]

Example 2 A pearl pigment ink (pearl pigment is a scale particle of titanium oxide-coated mica, and a binder is vinyl chloride-vinyl acetate copolymer) is coated on a surface of a colored PVC sheet (plasticizer: 12 parts by weight of DOP) having a thickness of 100 μm. ) Was applied by gravure to form a coating film having a dry film thickness of 3 μm.

The surface layer of the colored PVC sheet on and below the pearl ink coating layer was heated and softened, pressed with the same embossing plate as in Example 1, and embossed to form wavy linear grooves. Next, an annual ring pattern of wood grain was printed on one side of a colorless transparent PVC sheet (plastic material: 12 parts by weight of DOP) having a thickness of 80 μm (however, portions other than the printed pattern are blank and can be seen through. ing).

The transparent PVC sheet and the colored PVC sheet were bonded with a transparent two-component curable urethane adhesive so that the wavy linear grooves and the annual ring pattern faced each other. that time,
The running direction of the annual rings and the direction of the grooves were the same as illustrated in FIG. When the decorative sheet obtained as described above was irradiated with light from a different direction in the same manner as in Example 1, similarly, the movement of the lateral shrinkage of the wavy grain of the natural board was the same. It was possible to observe the movement of side lighting.

[0037]

According to the present invention, by providing an embossed concavo-convex pattern consisting of a group of wavy curves running in the same direction as the running direction of the wood grain print pattern, it is possible to use a natural board having a unique lateral shine such as maple, satin wood, tochi, maple Similar feelings of lateral shimmer and shimmering movement can be reproduced on the surface of the decorative material.

[Brief description of the drawings]

FIG. 1 is a diagram showing the principle of causing natural wood to shine.

FIG. 2 is a diagram showing an example of a cross section of a group of wavy curves according to the present invention.

FIG. 3 is a view for explaining the analysis of the optical density of wood grain of natural wood.

FIG. 4 is a diagram showing a process of creating a group of wavy curves according to the present invention.

FIG. 5 is a diagram showing an example of a group of wavy curves that can be used in the present invention.

FIG. 6 is a view for explaining running directions of a grain pattern and a group of wavy curves.

FIG. 7 is a diagram showing an example of a group of wavy curves created according to the present invention.

FIG. 8 is a diagram showing a change in “shine” when light is applied to the group of wavy curves in FIG. 7 from different directions.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI // B32B 21/08 B32B 21/08 (58) Investigated field (Int.Cl. ⁷ , DB name) B44F 9/02 B21D 31 / 00 B32B 7/02 B32B 33/00 B41M 3/06 B32B 21/08

Claims (7)

(57) [Claims] Claims: 1. At least a wood grain printing pattern is provided on a substrate sheet.
And embossed concavo-convex pattern consisting of wavy curves
Running direction of the annual ring pattern of the wood grain and the group of wavy curves
A cosmetic material characterized in that the running direction is the same as the running direction . 2. The makeup according to claim 1, wherein the woodgrain print pattern and the embossed concavo-convex pattern comprising a group of wavy curves are formed on different base sheets, and the base sheets are laminated. Wood. 3. The decorative material according to claim 1, wherein the wood grain print pattern and the embossed concavo-convex pattern composed of a group of wavy curves are formed on the same base sheet. 4. The method according to claim 1, wherein the group of wavy curves is a group of function curves, and the function parameter of each curve is sequentially changed, and the interval between the curves is a group of curves that smoothly changes in the line direction. 4. The cosmetic material according to any one of items 1 to 3. 5. When the group of wavy curves is a sinusoidal function curve, and the amplitude is A, the wavelength is λ, and the phase is α, at least one of the function parameters of amplitude, wavelength, and phase is interpolated with the Y-axis intercept. I of a curve represented by an equation obtained by equally dividing the difference between the wavelength difference, the phase difference, the period difference, and the Y coordinate difference between two sine wave curves represented by the equations , N-1,
The cosmetic material according to any one of claims 1 to 4, comprising a group of (n + 1) curves shown when the transition is made to n. _{x O = A O sin (2π} / λ O) y ... x n = A N sin (2πy / λ N + α) + Δx ... x i = ((A n -A O) i / n + A O) sin {((2π _{/ λ n -2π / λ O)} i / n + 2π / λ O) y + αi / n} + Δxi / n ... 6. A wavelength difference, a phase difference, a period difference, and a Y value of two sine wave function curves in which a group of sine wave function curves is a function parameter, in which amplitude, wavelength, phase, and Y-axis intercept are all different.
6. The cosmetic material according to claim 5, comprising a (n + 1) sine wave function curve obtained by dividing the coordinate difference by n and transiting. 7. A wavelength difference, a phase difference, and a period of two sine wave function curves obtained by superimposing two or more sine wave function curves and varying all function parameters such as amplitude, wavelength, phase, and Y-axis intercept. The cosmetic material according to claim 5, comprising n + 1 sinusoidal function curves obtained by dividing the difference between the difference and the Y coordinate difference by n.