JP7402600B2 - Decorative material - Google Patents

Description

The present invention relates to a decorative material, and more particularly, to a decorative material having a texture different from conventional ones.

There are a wide variety of design expressions in decorative materials, but for example, as described in Patent Document 1 and Patent Document 2, the cleavage plane of the stone and the uneven pattern of the wall surface shape of the trowel marks made by plastering such as cement and plaster are expressed on the surface. There are decorative materials.

Such decorative materials are often produced by pressing an embossing plate, which has an uneven pattern that is the inverse of the uneven pattern on the surface of the decorative material, onto the surface of the base material to shape it. The etching process forms irregularities on the surface. It is said that this allows for detailed expression.

Utility Model Publication No. 61-100595 Japanese Patent Application Publication No. 2003-211816

On the other hand, in the field of decorative materials, there has been a diversification of tastes in recent years and a demand for newer visual and tactile surface forms, and from this perspective, we provide decorative materials that express higher value-added design appearance and tactile sensation. It is desired to do so.

Therefore, an object of the present invention is to provide a decorative material that provides a texture different from that of the past, and in particular has a structure that is different from that of the past in terms of visual appearance, tactile sensation, or both visual and tactile aspects.

The inventor studied decorative materials that imitate the surface irregularities of conventional stone cleavage surfaces and wall shapes (trowel marks, etc.) created by plastering such as cement and plaster. It was found that the surface is monotonous because there are only two gradations, high and low, or there is only one type of slope even if there is a slope. Based on this knowledge, the present invention was completed by embodying a visually and tactilely different pattern form. The present invention will be explained below.

One aspect of the present invention is a decorative material having an uneven pattern formed on its surface, the decorative material having a base material and an uneven pattern formed on one side of the base material, the uneven pattern forming the uneven pattern. The part has a first slope and a second slope, and one end of the first slope and one end of the second slope are connected, so that the top of the convex part forms a ridgeline, and the first slope When the angle between the plane and the sheet surface (P _Sheet ) is the inclination angle θ ₁ and the angle between the second inclined surface and the sheet surface (P _Sheet ) is the inclination angle θ ₂ , the unevenness is such that θ ₁ <θ ₂ It is a decorative material that includes patterns.

Further, when the surface roughness of the first inclined surface in the ridge line portion is Ra ₁ and the surface roughness of the first inclined surface in the valley line portion of the recess adjacent to the ridge line is Ra ₂ , Ra ₁ > Ra ₂ . It may be configured as follows.
Here, the surface roughness Ra (μm) means the arithmetic mean roughness according to JIS B 0601-2001.

A pattern layer may be further laminated on the base material. Further, a transparent protective layer may be further laminated on the base material or the pattern layer.

Further, depending on the shape in which the ridge lines extend, the ridge lines can be configured to form a trowel-like pattern.

Furthermore, depending on the shape in which the ridge lines extend, the ridge lines may form a stone-like pattern.

The pattern layer may be configured to have a stone-like pattern.

According to the decorative material of the present invention, the height gradation of the uneven pattern is more diverse than before, and a decorative material with a pattern that visually and tactilely expresses a different design appearance than before has been realized. It becomes possible to do so.

FIG. 1 is an enlarged plan view of a part of the surface of the decorative material 10. As shown in FIG. FIG. 2(a) is a sectional view of the decorative material 10, and FIG. 2(b) is an enlarged view of a part of FIG. 2(a). FIG. 3 is a diagram illustrating θ ₁ and θ ₂ in an uneven pattern made up of a first inclined surface and a second inclined surface that constitute an uneven pattern of a decorative material. FIG. 4(a) is a plan view illustrating the relationship between the surface roughness at the ridge line portion and the valley line portion, and FIG. 4(b) is a sectional view illustrating the relationship between the surface roughness at the ridge line portion and the valley line portion. FIG. 5 is a sectional view of the decorative material 20. FIG. 6 is a perspective view of a portion of the decorative material 30. 7(a) is a plan view of the decorative material 40, and FIG. 7(b) is a perspective view of a portion of the decorative material 40. FIG. 8 is a diagram illustrating a situation in which unevenness is formed on a mold using a laser. FIG. 9 is an example of an embossing plate, and is a plan view of a part of the embossing plate for producing the decorative material 40. FIGS. 10(a) and 10(b) are diagrams illustrating other examples of the layer structure of the decorative material 10. FIG. 11 is an enlarged plan view of the measurement portion of the decorative material of the example.

Hereinafter, the present invention will be explained based on the form shown in the drawings. However, the present invention is not limited to these forms. In the drawings shown below, the sizes and proportions of members may be changed or exaggerated for ease of understanding. Further, for ease of viewing, illustrations of parts unnecessary for the explanation and repetitive symbols may be omitted.

FIG. 1 is an enlarged view (plan view) of a part of the decorative material 10 according to the first embodiment, viewed from the uneven pattern side. For convenience, arrows (x, y, z) indicating directions, that is, a coordinate system are also shown in FIG. Here, the xy direction is the in-plane direction of the decorative material 10, and the z direction is the thickness direction, that is, the normal direction to the in-plane direction (xy plane). Therefore, FIG. 1 is a view of the decorative material 10 viewed from the z direction, which is the uneven pattern side.
As can be seen from FIG. 1, the decorative material 10 of this embodiment has an uneven pattern on the surface of a wall coated by a plasterer using cement, wall clay, plaster, etc., processed with a trowel or the like.

FIG. 2(a) shows a cross section in the thickness direction of the decorative material 10 along the line IIa-IIa in FIG. 1 (ie, a surface cut along one plane parallel to the zx plane). This figure is a cross section cut in a straight line across the ridgeline 13a formed by the top of the convex portion 13 of the uneven shape of the base material 11. Such a cross section may be referred to as a main cutting surface.
Also, in FIG. 2(b), which is a part of FIG. 2(a), attention is paid to the vicinity of the ridgeline 13a formed by the top of one convex portion 13 and the valley line 14a formed by the bottom of one concave portion 14. An enlarged figure is shown.

As can be seen from FIGS. 1 and 2, the decorative material 10 of this embodiment has an uneven shape in which convex portions 13 and concave portions 14 are repeated on its surface, and ridge lines 13a formed by the tops of convex portions 13 and concave portions 14. The trough line 14a formed by the trough bottom expresses a three-dimensional uneven pattern similar to the trowel marks made by a plasterer.

Specifically, the decorative material 10 has a base material 11, and one surface of the base material 11 has an uneven pattern consisting of convex portions 13 and concave portions 14. Each configuration will be explained in detail below.

The base material 11 is a member that has a function of carrying an uneven pattern and imparting strength to the decorative material 10. The form of the base material 11 may be a film, a sheet, or a plate. Generally, they are called films, sheets, and plates in descending order of thickness, but in this form, the differences in thickness of these base materials are not essential matters, but are important matters. do not have. Therefore, in this specification, the essence of the present invention and the interpretation of the claims will remain unchanged even if any of the terms film, sheet, and plate are read as other terms as appropriate.

The material of the base material 11 is not particularly limited as long as it has the same function as a conventionally known decorative material. For example, the base material usually includes polyolefin resins such as polyethylene, polypropylene, thermoplastic olefin elastomers, and ionomers, acrylic resins such as polymethyl methacrylate and polybutyl methacrylate, and thermoplastics such as polyethylene terephthalate and polybutylene terephthalate. Polyester resin, thermoplastic urethane resin, vinyl chloride resin, ABS resin (acrylonitrile-butadiene-styrene copolymer), thermoplastic resin such as styrene resin, melamine resin, unsaturated polyester resin, two-component curable urethane resin, epoxy resin or ionizing radiation-curable resins that are cured by ionizing radiation (ultraviolet rays, electron beams, etc.) using monomers or prepolymers such as radical polymerization type acrylate type or cationic polymerization type epoxy type. used. In addition, when the material of the base material is resin, it may be colored with a known coloring agent. In addition, paper, non-woven fabric, metal, wood, etc. can also be used in the form of sheets, plates, three-dimensional objects, etc., laminated with the resin material as appropriate.

The base material 11 may be paper, or a fiber sheet such as a nonwoven fabric, woven fabric, or knitted fabric made of synthetic resin or glass fibers, and may be coated with melamine resin, phenol resin, urethane resin, epoxy resin, unsaturated polyester resin, or diallyl phthalate. It is also possible to use a composite material impregnated with a thermosetting resin such as resin and cured (so-called thermosetting resin decorative material, FRP, etc.).

There is no particular restriction on the thickness of the base material, but in the case of a sheet-like base material or a film-like base material, for example, the thickness is about 20 μm or more and 1000 μm or less, and in the case of a plate-like base material, the thickness is, for example, about 1 mm or more and 20 mm or less. Things can be used.

As can be seen from FIGS. 2(a) and 2(b), the uneven pattern is formed by repeating the convex portions 13 and the concave portions 14.
The convex portion 13 is formed by connecting one end of the first slope 15 and one end of the second slope 16 at the top, and this top forms a ridgeline 13a. On the other hand, the recessed portion 14 is formed by connecting the other end of the first inclined surface 15 and the other end of the second inclined surface 16 at a valley bottom, and this valley bottom forms a valley line 14a. As a result, convex portions 13 and concave portions 14 are alternately repeated, and ridge lines 13a and valley lines 14a are alternately repeated.
The ridge line 13a and the valley line 14a extend in a predetermined shape in the in-plane direction of the sheet, resulting in a form having a desired pattern. In this embodiment, as shown in FIG. 1, the ridge lines 13a and the valley lines 14a extend to create a pattern similar to a plasterer's trowel marks.

Here, as shown in FIG. 2(b), the first inclined surface 15 is in the sheet surface inward direction of the sheet surface P _Sheet (P ² _Sheet shown in FIG. 2(b)), that is, in FIG. has an inclination angle of θ ₁ with respect to a direction parallel to the xy plane or a virtual plane parallel thereto. On the other hand, the second inclined surface 16 has an inclination angle of θ ₂ with respect to a direction parallel to the in-plane direction of the sheet surface P _Sheet , as shown in FIG. 2(b). In this figure, the cross section in the in-plane direction of the sheet is indicated by a dotted line extending parallel to the x direction.
Hereinafter, the angle formed by the seat surface and the first inclined surface 15 will be referred to as the inclination angle θ ₁ of the first inclined surface 15 or the inclination angle θ ₁ for short. Further, the angle formed between the seat surface and the second inclined surface 16 is referred to as the inclination angle θ ₂ of the second inclined surface 16 or the inclination angle θ ₂ for short. Furthermore, the inclination angle θ ₁ and the inclination angle θ ₂ are also collectively referred to as the inclination angle or the inclination angles θ ₁ and θ ₂ .

Here, the "sheet surface P _Sheet " refers to a surface representing a direction in which the decorative material extends (spreads) within a plane when viewed as a whole. In the case of ordinary decorative materials, the envelope surface of the surface of the uneven pattern is often smoothed by the least squares method or the like to become a flat surface. In this case, a plane obtained by smoothing the envelope surface and any plane parallel thereto correspond to the sheet surface. In addition, as shown in FIG. 2(b), when the surface of the decorative material opposite to the uneven pattern (the so-called back surface) is a smooth plane, the surface opposite to the uneven pattern of the decorative material is smoothed and Any parallel surface can be used as the sheet surface.
In addition, if the surface obtained by smoothing these envelope surfaces or the surface obtained by smoothing the opposite surface of the uneven pattern is a non-planar surface represented by a curved surface, such once smoothed envelope surface or once smoothed opposite surface, Furthermore, the surface flattened by the least squares method or the like is defined as the sheet surface.

In the present invention, a sheet surface P _Sheet that serves as a measurement standard for defining the inclination angle is selected as a sheet surface that intersects both the first and second inclined surfaces 15 and 16. Among them, the influence of the difference in the angle of inclination between the first inclined surface 15 and the second inclined surface 16 on the visual sense and tactile sensation is greatest near the ridgeline 13a (top), so the inclination angle θ ₁ and the inclination angle θ ₂ It is preferable to select a surface close to the ridgeline 13a as the sheet surface P _Sheet , which is the measurement standard for defining the sheet surface P Sheet. Taking this point into consideration, the sheet surface P _Sheet to be used as the measurement standard for defining the inclination angle is selected as shown in (1) to (6) below, and the inclination angle θ ₁ and inclination angle θ ₂ are obtained.

(1)
First, regarding the specific convex portion 13 whose inclination angle θ ₁ and inclination angle θ ₂ are to be measured, the extending distance L in the sheet surface direction between the first inclined surface 15 and the second inclined surface 16 is determined. _The shorter distance L _short ( ₌ min( _{L 15} , L ₁₆ )). Here, min(a, b) is an operator that selects the smaller of the two numbers a and b. In the case of FIG. 2(b), since L _short =min(L ₁₅ , L ₁₆ )=L ₁₆ , the second inclined surface 16 is selected.

(2)
Next, the magnitude relationship between L _short and 4/3 mm=1.33333...mm will be clarified. The effective number of actual measurements is 4/3 mm, but it is sufficient to set it to 1.3 mm in consideration of the measurement accuracy with a general-purpose measuring device and the discrimination threshold for visual and tactile difference detection.

(3)
Based on the clarified size relationship, a specific sheet surface P ² _Sheet , which is a sheet surface that intersects both surfaces of the first inclined surface 15 and the second inclined surface 16, is determined as P ² _Sheet in FIG. 2(b). Choose. Specifically, it is done as follows.
(3-1) When L _short >4/3mm (≒1.3);
Starting from the ridgeline 13a, from there in the in-plane direction of the sheet (in the x direction in the same figure), intersect both surfaces of the first inclined surface 15 and the second inclined surface 16 at a distance of 1 mm from the ridgeline in the in-sheet-plane direction. The sheet surface to be set is the specific sheet surface.
(3-2) When L _short ≦4/3mm (≒1.3);
From the ridge line 13a as a starting point, from there in the in-plane direction of the sheet (in the x direction in the figure), (1/4)×L _short ≦distance in the in-sheet plane direction from the ridge line ≦ (3/4)×L _short In this case, the sheet surface that intersects both surfaces of the first inclined surface 15 and the second inclined surface 16 is defined as a specific sheet surface.

(4)
A triangular prism composed of the first inclined surface 15, the second inclined surface 16, and the specific sheet surface P ² _Sheet is defined as the triangular prism in the main cutting plane of the ridge line 13a (in the figure, the zx plane or a plane parallel to this). Find a triangle formed by the intersection of and the orthogonal plane.

(5)
Then, the interior angle formed by the base of the triangle corresponding to the specific sheet surface P ² _Sheet and the side corresponding to the first inclined surface 15 is defined as the inclination angle θ ₁ of the first inclined surface 15 . Similarly, the interior angle formed by the base of the triangle corresponding to the specific sheet surface P ² _Sheet and the side corresponding to the second slope 16 is defined as the slope angle θ ₂ of the second slope 16 .

(5-1)
The above is the case when the first inclined surface 15 and the second inclined surface 16 are flat (straight in the main cutting plane) as shown in FIG. 2, and the ridgeline 13a is straight (this form is not shown).

(5-2)
On the other hand, in an actual uneven pattern, at least one of the first inclined surface 15 and the second inclined surface 16 is non-planar (non-linear in the main cut plane as shown in FIG. 2) in at least a partial region. In fact, there are many. Therefore, in the case of such a non-planar surface, consider the following.
At that time, if either the first inclined surface 15 or the second inclined surface 16 has minute irregularities on the surface and becomes a rough surface, the rough surface is smoothed by an appropriate method such as the least squares method. seek. In this case, the surface obtained by smoothing the first inclined surface 15 is referred to as a smoothed first inclined surface 15S, and the surface obtained by smoothing the second inclined surface 16 is referred to as a smoothed first inclined surface 16S. Based on the properties of the first smoothed slope surface 15S and the second smoothed slope surface 16S, the following can be further considered.

(5-2-1)
When the smoothed first inclined surface 15S or the smoothed first inclined surface 16S is a flat surface, the inclination angle is determined in the same manner as in the case where the above-mentioned sloped surface is a flat surface for the smoothed sloped surface 15S or 16S. Find θ ₁ or θ ₂ .

(5-2-2)
On the other hand, when either the smoothed first inclined surface 15S or the smoothed first inclined surface 16S is a non-planar surface such as a curved surface, the following procedure is performed.
(5-2-2a)
Regarding the smoothed first inclined surface 15S or the smoothed second inclined surface 16S, which are non-planar, as shown in FIG. Connect and find the plane perpendicular to the main cutting plane. In the main cutting plane as shown in FIG. 3, this corresponds to drawing a straight line connecting a point corresponding to the ridge line 13a and a point corresponding to the valley line 14a. These are called a flattened first smoothed slope 15P and a flattened second smoothed slope 16P.
(5-2-2b)
Thereafter, the first smoothed slope 15S or the second smoothed slope 16S, which are non-planar, are replaced with the flattened first smoothed slope 15P or the flattened second smoothed slope 16P. Thereafter, the inclination angle θ ₁ or θ ₂ is determined in the same manner as in the case where the inclined surface is a flat surface.

(6)
Next, the presence or absence of distribution in the in-plane direction of the sheet in the uneven pattern is confirmed, and the inclination angle is determined. In this case, consider the following depending on the characteristics of the inclination angle in the uneven pattern.

(6-1)
If the inclination angle θ ₁ of the first inclined surface 15 and the inclination angle θ ₂ of the second inclined surface 16 in the uneven pattern have the same value throughout the sheet surface, then at any point in the uneven pattern The values of the inclination angle θ ₁ and the inclination angle θ ₂ may be used as the inclination angle θ ₁ and the inclination angle θ ₂ that represent the uneven pattern.

(6-2)
On the other hand, if the inclination angle θ ₁ of the first inclined surface 15 and the inclination angle θ ₂ of the second inclined surface 16 in the uneven pattern differ depending on the location within the sheet surface, the following will be done.
(6-2a)
First, an arbitrary part of an arbitrary ridge line 13a in the uneven pattern is selected. The values of inclination angle θ ₁ and inclination angle θ ₂ are determined by the method described above for 10 arbitrary different locations in the selected portion of the ridgeline, and the average value of the 10 points is used to determine the value of the selected portion of the ridgeline. Let the inclination angle θ ₁ and the inclination angle θ ₂ be.
(6-2b)
Next, an arbitrary part of another arbitrary single ridgeline in the uneven pattern is selected, and the inclination angle θ ₁ and the inclination angle θ ₂ of the selected part of the ridgeline are similarly determined as the 10-point average value.
(6-2c)
In this measurement, if about 5 to 10 selected parts of the plurality of ridge lines are aligned to the extent that it is judged that the variance of the 10-point average value of the slope angle θ ₁ and the slope angle θ ₂ is sufficiently converged, the 10 The point average value can be considered to have converged.
(6-2d)
After that, the 10-point average value of the obtained number of inclination angles θ ₁ and inclination angle θ ₂ is further averaged for each inclination angle θ ₁ and inclination angle θ ₂ , and the inclination of the uneven pattern is calculated. Let it be the value of angle θ ₁ and inclination angle θ ₂ .

According to (1) to (6) above, the specific sheet surface P ² _Sheet to be used as the measurement standard for defining the inclination angle is selected, and the inclination angle θ ₁ and the inclination angle θ ₂ are obtained.

In this embodiment, the relationship is θ ₁ <θ ₂ . This avoids monotony due to the limited height gradation of the concavo-convex pattern as in the past, and provides a decorative material with a rich appearance that is more similar to the trowel marks on cement, plaster, etc. made by actual plasterers. This makes it possible to reduce the appearance of discomfort. In addition, from the same point of view as the tactile sensation, it is a decorative material that is different from previous ones.

Although the specific magnitudes of the inclination angle θ ₁ and the inclination angle θ ₂ are not particularly limited, the inclination angle θ ₁ is preferably greater than 0° and less than or equal to 10°. Further, the inclination angle θ ₂ is preferably greater than 10° and less than 80°.
Furthermore, although the difference between the tilt angle θ ₁ and the tilt angle θ ₂ is not particularly limited, the larger the difference, the greater the effect from the viewpoint of visual perception and tactile sensation. Preferably, the difference is 5° or more and 70° or less.

Here, the interval between adjacent convex portions 13 (corresponding to the sum L ₁₅ +L _{16 of the lengths of the orthogonal projections of both inclined surfaces 15 and 16} on the sheet surface P _sheet in FIG. 2(b)) is the pattern to be expressed. There is no particularly preferable range because the size varies depending on the size, and the size necessary for expression can be set as appropriate, and the size may be regular or irregular. However, from the viewpoint of reproducing the appearance of normal trowel-like and stone-like uneven patterns, it is preferable that the interval between the convex portions 13 is in the range of 5 mm or more and 200 mm or less.
The difference in the thickness direction (z direction) between the ridge line 13a and the valley line 14a shown by _H1 in FIG. It is determined by the angle θ ₂ and the interval between the convex portions 13 . Among these, in terms of sufficient visibility of the pattern formed on the decorative material, design appearance, and tactile reproducibility, it is generally preferable to have a large height difference. However, on the other hand, from the viewpoint of ease of forming the uneven pattern on the base material 11, it is generally preferable that the height difference is small. That is, in general, as the difference in height increases, it becomes more difficult to manufacture the plate and to faithfully form the uneven pattern of the plate onto the base material. In addition, the minimum thickness of the base material on which the uneven pattern can be formed also increases. Therefore, from the viewpoint of achieving both reproducibility of the design appearance and ease of shaping, the height difference _H1 is preferably about 1 μm or more and 1000 μm or less.

In the first form, a fan finish pattern created by a plasterer's trowel marks is exemplified as an uneven pattern. However, in the present invention, the trowel mark surface unevenness pattern formed on the finished surface of cement, plaster, wall clay, etc. by plastering work, typified by the unevenness pattern such as so-called stucco finish, trowel finish, fan finish, etc. It is possible to simulate the uneven pattern of the cleavage plane on the surface of a polycrystalline stone plate such as the like, or the surface uneven pattern of the fractured surface of various stone plates such as limestone, marble (crystalline limestone), and sandstone.
Further, the uneven pattern expressed in the present invention does not necessarily have the same uneven shape or structure as the actual uneven pattern. In short, the present invention only needs to be configured so that the viewer can perceive the same design appearance and/or tactile sensation as the uneven pattern to be expressed.

Furthermore, it is preferable that the uneven pattern is configured as follows. Diagrams for explanation are shown in FIGS. 4(a) and 4(b). FIG. 4(a) is an enlarged plan view of the range indicated by IVa in FIG. 1, and FIG. 4(b) is a sectional view taken from the same viewpoint as FIG. 2(b).
As shown in A, the surface roughness Ra in a linear range of a predetermined length in the direction along the ridge line 13a at a portion of the first inclined surface 15 in the uneven pattern near the ridge line 13a is defined as _Ra1 .
In addition, as shown in B, in the uneven pattern, a ridge line 13a close to A and an adjacent valley line 14a are sandwiched between the first inclined surface 15 at a portion close to the valley line 14a in the direction along the valley line 14a. Let _Ra2 be the surface roughness Ra in a linear range of a predetermined length.
The relationship between Ra ₁ and Ra ₂ is preferably Ra ₁ >Ra ₂ . That is, regarding the first inclined surface 15 having a relatively gentle slope, it is preferable that the ridge line side (near the ridge line 13a) is relatively rougher than the valley side (near the valley line 14a). This results in a visually different product from a gloss standpoint, as well as a tactile feel. In particular, when expressing the appearance and feel of the uneven pattern on the surface of trowel marks in plastering, or the uneven pattern on the cleavage plane of the surface of a polycrystalline stone plate, it is possible to achieve an effective and rich expression.

Here, the surface roughness Ra ₁ and Ra ₂ are measured as follows.
As in the case of the inclination angle θ ₁ of the first inclined surface 15 and the inclination angle θ ₂ of the second inclined surface 16, the difference in surface roughness has the greatest influence on visual and tactile sensations near the ridgeline 13a (top). Therefore, it is preferable to select a surface close to the ridgeline 13a as the measurement reference for surface roughness Ra ₁ and Ra ₂ . However, the inclination angle and surface roughness have slightly different effects on visual perception and tactile sensation. In consideration of this point, the measurement positions and measurement conditions for surface roughness Ra ₁ and Ra ₂ are selected as follows. Note that the surface roughness Ra (μm) here means the arithmetic mean roughness according to JIS B 0601-2001.

As described above in the explanation of the measurement of the inclination angle θ ₁ and the inclination angle θ ₂ , in the surface roughness measurement site, the extending distance in the sheet surface direction of the first inclined surface 15 and the second inclined surface 16 The shorter distance L _short is determined from L ₁₅ to L ₁₆ (corresponding to the length in the oblique direction of the orthogonal projection of the inclined surface onto the sheet surface P _Sheet shown in FIG. 2(b)).

In the case of L _short >4 mm, the surface roughness Ra ₁ of the portion of the first inclined surface 15 close to the ridge line 13a is determined by the distance (L _A ) from the ridge line 13a within 2 mm on the first inclined surface 15. A value measured on a straight line in the area with a measurement length L _C of 4 mm and a cutoff value of 0.8 mm.
On the other hand, regarding the surface roughness Ra ₂ of the portion of the first inclined surface 15 near the valley line 14a, on the first inclined surface 15, the straight line in the area within a distance (L _B ) from the valley line 14a is 2 mm. , the measurement length _LD is 4 mm, and the cutoff value is 0.8 mm.

In the case of L _short ≦4 mm, regarding the surface roughness Ra ₁ of the portion of the first inclined surface 15 close to the ridgeline 13a, the distance (L _A ) from the ridgeline 13a on the first inclined surface 15 is L _A Measurement was performed on a straight line in the area of ≦(1/2)×L _short , more preferably L _A ≦(1/4)×L _short , with a measurement length L _C of 4 mm and a cutoff value of 0.8 mm. value.
On the other hand, regarding the surface roughness Ra ₂ of the portion of the first inclined surface 15 near the valley line 14a, on the first inclined surface 15, the distance (L _B ) from the valley line 14a is LB _≦ (1/2 )×L _short , more preferably, a value measured on a straight line in the region of L _B ≦(1/4)×L _short with a measurement length L _D of 4 mm and a cutoff value of 0.8 mm.

Although the specific sizes of Ra ₁ and Ra ₂ are not particularly limited, it is preferable that Ra ₁ is 0.02 μm or more and 20 μm or less. Further, Ra ₂ is preferably 0.005 μm or more and 5 μm or less.
Furthermore, although the difference between Ra ₁ and Ra ₂ is not particularly limited, the larger the difference, the greater the effect from the viewpoint of visual perception and tactile sensation. Preferably, the difference is at least 0.02 μm, more preferably at least 0.5 μm, even more preferably at least 5 μm.

FIG. 5 shows a diagram illustrating the second form of the decorative material 20. FIG. 5 is a diagram from the same viewpoint as FIG. 2(a). In addition, here, the same components as the decorative material 10 of the first embodiment are given the same reference numerals, and the description thereof will be omitted.
In the decorative material 20, a pattern forming layer 12, a pattern layer 21, and a transparent protective layer 22 are further laminated on the structure of the decorative material 10.
The pattern forming layer 12 is a layer that is laminated on one surface of the base material 11 and imparts a pattern to the decorative material, and in this embodiment has a predetermined uneven shape to form an uneven pattern. If the base material 11 itself has the ability to form an uneven pattern (receptivity to an uneven pattern), as described above, the uneven pattern can be formed directly on the base material 11 without providing the pattern forming layer 12 separately from the base material 11. A form that forms a pattern may be adopted.

The pattern layer 21 is a layer on which a pattern (design) is applied, and is laminated on the first inclined surface 15 in this embodiment.
Specific patterns in the pattern layer 21 include woodgraining, an ironwork pattern such as a stucco finish, a fan finish, etc., and a stone pattern such as a cleavage surface or a fractured surface of a rock plate such as granite, marble, or sandstone. Various patterns, color patterns, photographs, paintings, drawings or geometric patterns, fabrics such as various fabrics and non-woven fabrics, genuine leather, artificial leather, grained resin, etc. can be placed here without particular limitation. be able to. For example, if the pattern forming layer 12 forms a pattern with a predetermined expression (in this embodiment, a trowel-like pattern), the pattern can be made to match this pattern. In this case, the pattern may be a pattern that matches the unevenness of the pattern forming layer 12, or may be a pattern different from the unevenness of the pattern forming layer 12.
Such a design of the pattern layer 21 can be formed using an ink layer formed by printing such as gravure printing, silk screen printing, and inkjet printing.

The ink constituting the pattern layer 21 may be appropriately selected from known inks depending on the color tone of the pattern and required physical properties. As the binder resin for the ink, for example, acrylic resin, vinyl chloride-vinyl acetate copolymer, cellulose resin, urethane resin, polyester resin, etc. can be used singly or in combination of two or more.
Colorants (pigments, dyes, etc.) include, for example, white colorants such as titanium white and zinc white, black colorants such as carbon black, iron black, and azomethine azo pigments, yellow lead, titanium yellow, and polyazo pigments. Yellow colorants such as yellow, isoindolinone yellow, nickel azo complex, red colorants such as Bengara, cadmium red, polyazo red, quinacridone red, blue colorants such as ultramarine blue, cobalt blue, phthalocyanine blue, aluminum, brass, etc. Colorants such as metallic pigments made of flaky foil pieces, mica coated with titanium dioxide, pearlescent pigments made of flaky flakes of basic lead carbonate, etc. can be used.
In addition, appropriate amounts of various additives such as plasticizers, surfactants, heat stabilizers, ultraviolet absorbers, light stabilizers, and lubricants can be added as necessary.

The transparent protective layer 22 is a layer that protects the pattern layer 21 and the pattern forming layer 12 from contamination, scratches, etc., and can be made of transparent resin, transparent glass, or the like.
When a transparent resin is used, for example, a layer made of a thermoplastic resin or a cured resin can be used.
Note that if sufficient surface durability such as stain resistance and scratch resistance can be secured for the intended use with only the base material 11, pattern forming layer 12, and pattern layer 21, the transparent protective layer 22 may be omitted. be able to.

Examples of thermoplastic resins include acrylic resins such as polymethyl (meth)acrylate and polyethyl (meth)acrylate, polyolefin resins such as polypropylene and polyethylene, fluororesins such as polyvinyl fluoride and polyvinylidene fluoride, and polyethylene terephthalate ( PET), polybutylene terephthalate (PBT), polyester resins such as polyethylene naphthalate (PEN), polycarbonate resins, vinyl chloride resins, acrylonitrile-butadiene-styrene resins (ABS resins), acrylonitrile-styrene-acrylic acid ester resins, etc. Can be mentioned. Note that "(meth)acrylic" means acrylic or methacryl.

The layer of cured resin is a layer obtained by curing a curable resin composition, and the curable resin composition is a composition containing a curable resin. Examples of the curable resin composition include a thermosetting resin composition containing a thermosetting resin, an ionizing radiation curable resin composition containing an ionizing radiation curable resin, and the like.
Examples of thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curing polyurethanes), epoxy resins, aminoalkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, Examples include melamine-urea cocondensation resin, silicone resin, and polysiloxane resin. The thermosetting resin composition may contain components involved in the curing reaction of the thermosetting resin, such as a catalyst and a curing agent (including a crosslinking agent, a polymerization initiator, a polymerization accelerator, etc.), as necessary. It's okay.
An ionizing radiation-curable resin is a resin that undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation and changes into a three-dimensional polymer structure. Among electromagnetic waves and charged particle beams, ionizing radiation has energy quantum capable of polymerizing or crosslinking molecules, and in addition to ultraviolet (UV) and electron beams (EB), electromagnetic waves such as X-rays and γ-rays, α It includes charged particle beams such as ion beams and ion beams, but ultraviolet rays (UV) or electron beams (EB) are usually used. Among ionizing radiation curable resins, electron beam curable resins can be made solvent-free, do not require a photopolymerization initiator, and can provide stable curing characteristics.
Examples of the ionizing radiation-curable resin include monomers, oligomers, or prepolymers having polymerizable unsaturated bonds such as (meth)acryloyl groups, epoxy groups, etc. in the molecule that can be crosslinked by irradiation with ionizing radiation. Compositions containing the above can be used.

Although the thickness of the transparent protective layer 22 is not particularly limited, it is preferably 0.1 μm or more and 20 μm or less. If it is thin, it will have high durability against bending, etc., but it will have poor scratch resistance.If it is thick, it will be strong against scratches and scratches, but it will be weak against deformation due to bending, etc., and cracks will occur. Therefore, by keeping the thickness within the above range, a good balance can be achieved. It can be a transparent protective layer 22. More preferably, it is 1 μm or more and 10 μm or less.

The decorative material 20 described above also has the same effect as the decorative material 10, especially when the angle of inclination satisfies the relationship θ ₁ <θ ₂ .

FIG. 6 shows a diagram illustrating a decorative material 30 according to a third embodiment. FIG. 6 is a perspective view showing a portion of the decorative material 30 cut out around one ridgeline 33a and a valley line 34a.
The decorative material 30 of this embodiment has a pattern forming layer 32 having a stone-like pattern. This pattern forming layer 32 also has a stone-like appearance in the direction in which its ridge lines 33a and valley lines 34a extend, following the pattern forming layer 12.
This pattern forming layer 32 also has a first inclined surface 35 and a second inclined surface 36 following the pattern forming layer 12 to form a ridgeline 33a and a valley line 34a, and the first inclined surface 35 has a second inclined angle. It has an uneven shape so that the angle of inclination is smaller than the angle of inclination of the inclined surface 36. Further, the relationship between the surface roughness near the ridge line 33a and the surface roughness near the valley line 34a is formed so that the surface roughness near the ridge line is larger than the surface roughness near the valley line, following the pattern forming layer. It is preferable that
Unlike conventional methods, this avoids monotonous expression, and it is possible to obtain a decorative material with a rich appearance that is closer to the actual stone grain with less discomfort. In addition, it is a decorative material that is different from previous ones from a tactile perspective.

In the decorative material 30, the pattern forming layer 32 also serves as a base material, and on one side of the single layer of the pattern forming layer 32 is a pattern layer 31 that expresses the designed appearance of the wall surface using colored plaster consisting of shading of colored ink. It has a structure in which the transparent protective layer is omitted.
In this embodiment, the pattern of the picture layer is a stone-grain pattern consisting of a colored ink layer in which the color tone is distributed in gradations of light and light within the plane, and has a design appearance that matches the uneven pattern of the arrowhead pattern. Applied. In addition, also in this embodiment, the uneven pattern of the pattern forming layer 32 and the pattern of the pattern layer may be different.

FIG. 7 shows a diagram illustrating a decorative material 40 according to a fourth embodiment. 7(a) is a plan view of the decorative material 40 corresponding to FIG. 1, and FIG. 7(b) is a perspective view showing a part of the decorative material 40.
As can be seen from FIGS. 7(a) and 7(b), the decorative material 40 of this embodiment is an example in which the base material 11 has a stone-like uneven pattern on one surface. With this uneven pattern, a stone grain effect is expressed in the direction in which the ridge lines 43a and valley lines 44a extend, following the trowel pattern of the uneven pattern of the decorative material 10.
The uneven pattern of the decorative material 40 also has a first inclined surface 45 and a second inclined surface 46 following the uneven pattern of the decorative material 10 to form a ridge line 43a and a valley line 44a, and the slope of the first inclined surface 45 It has an uneven shape such that the angle is smaller than the angle of inclination of the second inclined surface 46. Further, the relationship between the surface roughness near the ridge line 43a and the surface roughness near the valley line 44a also follows the uneven pattern of the decorative material 10, so that the surface roughness near the ridge line is larger than the surface roughness near the valley line. It is preferable that it be formed.
Also in this embodiment, an uneven pattern is formed on one side of the base material 11, and on one side of this uneven pattern, a picture (not shown) expressing the external design of a wall surface using colored plaster made of light and shade of colored ink is formed. layer, but the transparent protective layer is omitted.
This avoids the conventional monotonous expression and allows a decorative material with a rich appearance closer to the actual stone grain to be obtained. In addition, it is a decorative material that is different from previous ones from a tactile perspective.

Next, an example of a method for manufacturing the decorative material 10 will be explained. However, the method for manufacturing the decorative material 10 is not limited to this.
The manufacturing method described below includes a step of creating a master image, a step of creating a plate, and a step of forming an uneven pattern.

In the process of creating a block image, the pattern to be expressed on the surface of the base material 11 in plan view is obtained as an image density (shade), and this is used as the block image. It is preferable that the block image is digital data, so if it is not digital data, the manuscript itself, such as a plastered surface such as stone or ironwork, or a photograph of the manuscript can be read with a scanner and converted using an AD conversion method. , pixels are arranged in a two-dimensional coordinate plane (x, y), and digital data is obtained in which each pixel is associated with a unique density value. Furthermore, if the pattern was designed from the beginning using digital data using CAD or the like, that digital data can be used.
Now you can obtain the block image as digital data.

In the step of creating this block image, a linear binary image pattern is generated in the continuous tone density image based on the obtained continuous tone density image of the pattern, and a linear binary image pattern is generated in the continuous tone density image. The pixels are arranged so that some of the pixels constitute the ridge line or the valley line, and the ridge line and valley line in the draft image are obtained as digital data.

Specifically, for example, the following method is used. However, the present invention is not limited to decorative materials obtained by the method described below.
That is, the rate of change in image density as the position coordinate increases in each direction within the plane is calculated. Then, the pixel at the maximum point where the image density changes from increasing to decreasing as the coordinate increases is defined as a pixel on the edge line 13a. Furthermore, the pixel at the minimum point where the image density changes from decreasing to increasing as the coordinate increases is defined as the pixel of the valley line 14a.
By performing such processing on each pixel of the continuous tone density image, image data having lines corresponding to the ridge lines 13a and valley lines 14a in the continuous tone density image is obtained.

In the image data, the density value increases as the point corresponding to the ridge line 13a is gradually approached in a direction orthogonal to the line corresponding to the ridge line 13a in the two-dimensional coordinate plane, and The image data has the characteristic that the density value is maximum, and the density value decreases as it gradually departs from the point corresponding to the ridge line 13a.
Further, in the image data, the density value decreases as the point corresponding to the valley line 14a is gradually approached in a direction orthogonal to the line corresponding to the valley line 14a in the two-dimensional coordinate plane. The image data has the characteristic that the density value becomes minimum at the point corresponding to the valley line 14a, and increases as the density value gradually departs from the point corresponding to the valley line 14a.

Next, in the uneven pattern desired for the decorative material to be manufactured, the angle formed by the inclination angle θ ₁ of the first inclined surface 15 and the second inclined surface 16 is determined as follows with respect to the inclination angle θ ₂ of the second inclined surface 16: θ ₁ <θ The design value of the area ratio σ of the area satisfying the relationship ₂ to the total area of the decorative material is set to a desired value.

Next, in the continuous tone density image processed as described above, the difference in density gradient before and after the edge line 13a is calculated, and the difference in the average density gradient in the areas on both sides of the edge line 13a is confirmed.
Specifically, the concentration value at each position coordinate is determined while gradually advancing a predetermined distance toward the ridge line 13a in a direction orthogonal to the ridge line 13a, and the average concentration gradient along the advancing path and distance is calculated. When the valley line 14a and the ridge line 13a are adjacent to each other, the predetermined distance is the distance from the adjacent valley line 14a to the ridge line 13a. Further, while moving forward from the ridge line 13a toward the adjacent valley line 14a along the forward path, the concentration value at each position coordinate is determined, and the average concentration gradient along the forward path and distance is calculated.

Next, the average density gradients on both sides of the specific pixel on the specific edge line 13a along the forward path are compared. Such processing is performed for each pixel on each edge line 13a.

Next, in the continuous tone density image, among the pixels on all the edges 13a, the length of the portion of the edge line 13a that satisfies the condition that the average density gradients on both sides of the edge line 13a are different is calculated for the entire area of the continuous tone density image. An integral value S is obtained by integrating over the area.
Next, the integral value S and the area ratio σ set as a design value are compared. Then, whether or not the errors between the two have converged within a preset tolerance range e, that is,
|(S-σ)／σ|≦e
Check whether the conditions are satisfied.
If this has converged, the creation of the block image is finished. On the other hand, if it has not converged, the density of each pixel in the continuous tone density image is corrected so that it converges.

The line segment of the ridge line generated in this way corresponds to the ridge line of the decorative material, and the area from the ridge line to the adjacent valley line on one side selected by the block image creator is assigned to the first slope, and the area up to the adjacent valley line on the other side is assigned to the second slope.

In the process of making a plate, a shading image (shading of density values) of a pattern in a planar view is converted into a plate depth based on a master image to create a reverse undulating pattern of unevenness (high and low height). An embossed version (molding mold for decorative material) is made on the surface.
Specifically, the manufacturing process of the uneven pattern consists of the following steps (A) to (E).

[(A) Gradation gradation image creation process]
Grayscale image data corresponding to the uneven pattern of FIG. 1 obtained above is obtained. This grayscale image data is also called uneven pattern image data.

[(B) Metal roll preparation process]
In parallel with the above step (A), a metal roll 70 for embossing plate engraving as shown in FIG. 8 is prepared. The metal roll 70 is formed by plating a copper layer on the surface of a hollow iron cylinder having rotation drive shafts 71 at both ends in the axial direction. The surface of the metal roll 70 is polished with a grindstone to make it rough, thereby preventing a decrease in engraving efficiency due to specular reflection of the engraving laser beam.

[(C) Laser light engraving process]
As schematically shown in FIG. 8, a laser beam direct engraving machine is used to engrave the surface of the metal roll 70 prepared in step (B) based on the uneven pattern image data created in step (A). As a result, an uneven pattern is formed on the surface, which is the same shape in plan view as the uneven pattern on the surface of the decorative material, as shown in FIG. .
Therefore, the shape that the uneven pattern on the embossing plate should have is a form in which the uneven relationship of the above-mentioned uneven pattern on the decorative material is reversed, and can be considered in the same way.

The metal roll 70 is driven by an electric motor via its rotary drive shaft 71, and rotates about the rotary drive shaft 71 as a central axis. The entire surface of the metal roll 70 is scanned with a fiber laser beam L emitted from the laser head 72 with an oscillation wavelength of 1024 nm, a laser spot diameter of 10 μm, and an output of 600 W. At that time, the laser beam is switched ON and OFF (switching between irradiation and non-irradiation) according to the density value of the uneven pattern image data created in step (A), and the irradiation position is irradiated with a single laser beam. A recess with a depth of 10 μm is formed by evaporating the metal. The scanning of the surface of the metal roll with the laser beam is repeated 10 times. In addition, in order to prevent the evaporated metal from becoming powder and remaining or adhering to the surface of the metal roll 70, the engraving liquid T was sprayed from the engraving liquid outlet 73 onto the laser beam irradiated area on the surface of the metal roll 70. Laser light irradiation is performed in this state.
At that time, for example, at the position coordinates of the image density corresponding to a plate depth of 50 μm on the uneven pattern image data, the laser light is irradiated (ON) for only the first 5 scans out of a total of 10 scans, and the remaining 5 scans are For batches, the laser light is controlled to be non-irradiated (OFF).

In converting the image density on the uneven pattern image data corresponding to each position coordinate on the metal roll 70 to the plate depth to be engraved, first, the distribution of the desired plate depth (as a design target) on the embossing is Determine the width (maximum plate depth - difference design plate depth, which corresponds to the maximum height difference on the surface of the decorative material obtained after embossing). After this, the engraving control program of the laser beam direct engraving machine is set so that the distribution width of image density on the uneven pattern image data corresponds to the distribution width of plate depth.
Specifically, with respect to the image density on the uneven pattern image data, if a part with a large image density corresponds to a part with a large plate depth, the maximum density should be the maximum plate depth (maximum engraving amount), or the minimum Program the density to correspond to the minimum plate depth (minimum engraving amount).
The scanning of the laser beam is completed, and a desired uneven shape is formed on the surface of the metal roll 70.

[(D) Electric field polishing process]
After cleaning the engraving liquid, electrolytic polishing is performed to remove metal residues attached to the surface of the metal roll 70.

[(E) Chrome plating process]
After step (D), a chromium layer with a thickness of 10 μm is formed on the surface of the metal roll by plating.

As described above, it is possible to obtain a plate (a mold for decorative material, in this embodiment, an embossed plate) having on its surface an uneven shape in which the uneven pattern formed on the surface of the base material 11 is reversed. FIG. 9 shows a plan view of a part of the embossing plate thus obtained. This embossing plate is an embossing plate for molding the decorative material 40 described above.

Next, in a step of forming an uneven pattern, the decorative material 10 is obtained by embossing the base material 11 using the prepared version (embossing version). Embossing may be performed by any suitable known method and is not particularly limited. For example, typical embossing methods are as follows.
A resin sheet made of thermoplastic resin such as polyolefin resin is used as the base material. This base material is heated and softened, and an embossing plate is pressed onto the surface of the base material to form an uneven pattern on the surface of the embossing plate on the surface of the resin sheet. The resin sheet is then cooled and solidified to fix the uneven pattern on the resin sheet. Thereafter, the resin sheet with the uneven pattern formed thereon is released from the embossing plate.
Here, to further explain various embossing methods, there are, for example, the following methods (a) to (e).

(a) A resin sheet serving as a base material is heated and softened, and an embossing plate is pressed to perform embossing.
(b) Embossing and lamination can be achieved by heat-sealing the resin sheet (base material) that will serve as the top sheet and the resin sheet (second base material) that will serve as the base sheet using heat pressure when pressing the embossing plate. Embossing is performed using the doubling embossing method, which is performed at the same time.
(c) A resin sheet (base material) to be used as a top sheet is melt-extruded from a T-die, brought into contact with a cylindrical embossing plate that also serves as a cooling roller, and embossed at the same time as the top sheet is formed. At this time, a resin sheet (second base material) serving as a base sheet inserted into the back side of the topsheet is further heat-sealed to perform doubling embossing at the same time as film formation.
(d) As disclosed in JP-A-57-87318 and JP-A-7-32476, an uncured liquid material of ionizing radiation-curable resin is applied to the surface of a cylindrical embossing plate. Further, a base sheet made of a resin sheet or the like is superimposed thereon, and ionizing radiation is irradiated to harden the uncured liquid material to form a cured product. At that time, after adhering the cured product to the base sheet, it is released from the embossing plate to form a base material consisting of the base sheet and the cured product on the base sheet, and the base material is embossed.
(e) Impregnated paper such as titanium paper impregnated with an uncured thermosetting resin such as melamine resin is placed on a backing material such as core paper or wood plywood, and a plurality of these are placed. The layers are laminated and integrated by hot press molding to produce a thermosetting resin decorative material. At this time, an embossing plate is inserted into the surface side of the impregnated paper, and when the thermosetting resin is impregnated and cured to form a decorative material, the surface is embossed simultaneously with hot press.

Note that thermoplastic resin is typically used as the material for the base material used in the embossing methods (a) to (c), and thermoplastic resin is typically used as the material for the base material used in the embossing method (d). An ionizing radiation-curable resin is used in (e), and a thermosetting resin is typically used as the material for the base material used in the embossing method (e).

The decorative material 10 can be obtained as described above.

Next, a modification of the decorative material 10 will be described. The layer structure is shown in FIG. 10(a) and FIG. 10(b).

The decorative material 10' having the structure shown in FIG. 10(a) has a decorative layer 11a formed on the back side of the base material 11. To produce the decorative material 10' having such a configuration, for example, a transparent resin sheet is used as the base material 11 so that the decorative layer 11a can be seen through, and the decorative layer is placed on the back side of the base material 11. After forming 11a by printing, embossing may be performed by heating and softening and pressing the embossing plate against the front surface.

The decorative material 10'' having the structure shown in FIG. 10(b) is different from the structure shown in FIG. This is an example in which another base material 11b is laminated. In order to produce the decorative material 10'' having such a structure, the decorative layer 11a is printed on the front side of the base material 11b made of a colored opaque thermoplastic resin sheet, which is used as the base sheet. A base sheet and a base material 11 made of a transparent thermoplastic resin sheet serving as a top sheet may be laminated by heat fusion using a doubling embossing method, and at the same time, a desired uneven pattern may be embossed on the surface of the base material 11.

There are no particular restrictions on the uses of the decorative materials described above, but examples include interior materials for buildings such as walls, floors, and ceilings, exterior materials for buildings such as exterior walls, roofs, gates, fences, and fences, doors, and windows. Surface materials for fittings such as frames, doors, door frames, edges, baseboards, handrails, etc., surface materials for housings of home appliances such as television receivers, refrigerators, and office equipment such as copying machines, chests of drawers, etc. surface materials for furniture, boxes, containers such as resin bottles, interior materials or exterior materials for vehicles, interior materials or exterior materials for ships, etc.

In the example, the inclination angle θ ₁ of the first inclined surface and the inclination angle θ ₂ of the second inclined surface were measured for a decorative material produced following the example of the decorative material 10. Furthermore, the surface roughness Ra ₁ of the ridge line portion and the surface roughness Ra ₂ of the valley line portion were measured. FIG. 11 shows a partially enlarged plan view of the decorative material in the example. Of these, the parts surrounded by P and Q were the measurement targets.

<Shape of decorative material>
The decorative material produced in the example used a single-layer base material having a thickness of 300 μm and consisting of a sheet of white polyvinyl chloride containing 20 parts by mass of a plasticizer to which a white pigment made of titanium dioxide particles was added. It is.
This is formed by forming, on the surface of one side thereof, an uneven pattern having the characteristics of the uneven shape shown in FIG. 11 in plan view and shown in Table 1 by the above-mentioned manufacturing method.

<Measurement of θ ₁ and θ ₂ >
θ ₁ and θ ₂ were measured by inputting a three-dimensional shape using a three-dimensional measuring instrument (Keyence Corporation, VR-3000) and following the method described above.

<Measurement of Ra ₁ and Ra ₂ >
Ra ₁ and Ra ₂ were measured as described above by inputting the three-dimensional shape using a three-dimensional measuring device (Keyence Corporation, VR-3000).

<Results>
The results shown in Table 1 above were obtained.

A decorative material having such an aspect could be obtained. This resulted in a decorative material with a different texture from the visual and tactile viewpoints.

10 Decorative material 11 Base material 12 Pattern forming layer 13 Convex portion 13a Ridge line 14 Concave portion 14a Valley line

Claims (6)

A decorative material with an uneven pattern formed on its surface,
comprising a base material and an uneven pattern formed on one side of the base material,
The convex portion forming the uneven pattern has a first slope and a second slope, and one end of the first slope and one end of the second slope are connected, so that the convex portion has a first slope and a second slope. The top portion forms a ridgeline, the difference in height thereof is 1 μm or more and 1000 μm or less, and the adjacent convex portions are arranged with an interval of 5 mm or more and 200 mm or less,
When the angle between the first inclined surface and the seat surface is an inclination angle θ ₁ and the angle between the second inclined surface and the seat surface is an inclination angle θ ₂ , θ ₁ is greater than 0° and less than or equal to 10°, θ ₂ is greater than 10° and less than 80°, and θ ₁ <θ ₂ , including the uneven pattern in which the difference is 5° or more and 70° or less ,
When the surface roughness of the first slope in the ridgeline portion is Ra ₁ and the surface roughness of the first slope in the valley line portion of the recess adjacent to the ridgeline is Ra ₂ , Ra ₁ >Ra ₂ . be,
Decorative materials. The decorative material according to claim 1, further comprising a pattern layer laminated on the base material. The decorative material according to claim 1 or 2, further comprising a transparent protective layer laminated on the base material or the pattern layer. 4. The decorative material according to claim 1, wherein the ridge lines form an trowel-like pattern due to the extending shape of the ridge lines. The decorative material according to any one of claims 1 to 3, wherein the ridge lines form a stone grain pattern due to the shape in which the ridge lines extend. The decorative material according to claim 2 or 3, wherein the pattern layer has a stone-like pattern.

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