JP2021142743A - Decorative material - Google Patents

Abstract

To provide a decorative material adopting a configuration forming an uneven pattern comprising actual irregularities on the surface, capable of reproducing a design appearance of a hairline metal plate having small appearance unnaturalness, and impressing a hairline style more strongly.SOLUTION: A decorative material having a hairline style uneven pattern formed on the surface, incudes a pattern forming layer having the uneven pattern. In the pattern forming layer, a plurality of linear recesses which are linear grooves extending in one direction are arranged as the uneven pattern, and ink is arranged inside the linear recesses, and the ink includes brilliant ink.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to cosmetic materials.

There are a wide variety of design expressions in decorative materials, and among them, there are decorative materials having a hairline-like uneven pattern. The hairline is a polished eye formed for the purpose of aesthetics on the surface of the metal, and is a streak-like uneven pattern formed by polishing. Such a hairline (concavo-convex pattern) is composed of an aggregate in which a plurality of concave portions having a narrow plan view in one direction are arranged in a positional relationship in which the extending directions are parallel to or substantially parallel to each other. Therefore, the decorative material having a hairline-like uneven pattern is a decorative material formed of a material other than metal and expressing the uneven pattern imitating the hairline uneven pattern.

Conventionally, such a hairline-like decorative material has a pattern printed with a glittering ink on a colored base material, and a transparent resin (thermoplastic resin) is laminated and heated to soften it, and then embossed. It had an uneven pattern consisting of linear recesses that imitated hairlines.
In such a decorative material, since the colored base material, which is a thermoplastic resin, inevitably expands and contracts during embossing, it is difficult to synchronize (that is, register) the positions of the linear recess and the pattern, and the glitter ink. Since a thick resin (resin layer for embossing unevenness) is required on the top, it is not always sufficient to express a hairline-like pattern by reducing the brilliant effect of the brilliant ink. There wasn't.

Therefore, it has been attempted to manufacture a decorative material that imitates the appearance of a hairline uneven pattern only by printing a pattern layer that is easy to register without embossing the uneven pattern. For example, Japanese Patent Application Laid-Open No. 2005-74637 (Patent Document 1) describes a transparent resin sheet having a high gloss on the front surface, which contains a hairline pattern pattern layer with black ink on the back surface and a metal or pearl pigment foil piece on the back surface thereof. A solid layer of the entire surface of the ink (brilliant ink) is printed and formed, and a hairline pattern pattern layer is printed and formed on the front surface of the transparent resin sheet by registering the hairline pattern pattern layer with the hairline pattern pattern layer on the back surface. Disclose that.
In such a decorative material, the pattern layers of the hairline patterns on both the front and back sides of the transparent resin base material match each other (both pattern layers are aligned at the same position in the plan view), so that the appearance is poor due to the misalignment of the two pattern layers. Although it is not natural, the reproducibility (fidelity) of the design appearance of the hairline-processed metal plate surface is lower than that of forming an uneven pattern consisting of actual irregularities on the surface. Further, since the surface of the decorative material is a smooth surface, the tactile sensation of the surface is also smooth, and the tactile sensation of the hairline uneven pattern on the actual metal surface cannot be reproduced.

Japanese Unexamined Patent Publication No. 2005-74637

Therefore, in view of the above problems, the present disclosure adopts a form in which an uneven pattern consisting of actual unevenness is formed on the surface, and can reproduce the design appearance and tactile sensation of a hairline metal plate having a small appearance unnaturalness, and has a hairline tone. The challenge is to provide a cosmetic material that can give a stronger impression of the fact that it is.

One aspect of the present disclosure is a decorative material in which a hairline-like uneven pattern is formed on the surface thereof, the present invention includes a pattern forming layer having an uneven pattern, and the pattern forming layer has a linear shape extending in one direction as an uneven pattern. This is a decorative material in which a plurality of linear recesses, which are grooves, are arranged, ink is arranged inside the linear recesses, and the ink contains a brilliant ink. In addition, this ink may contain a non-brilliant colorant.

At least a part of the plurality of linear recesses may be configured to change in width as the linear recess moves in the extending direction.

At least a part of the plurality of linear recesses may be configured to change in depth as the linear recess moves in the extending direction.

Even if at least a part of a plurality of linear recesses appearing in a cross section orthogonal to the extending direction of the linear recesses are adjacent to each other and the deep linear recesses have a larger ink area. good.
Here, the linear recesses configured so that the area of the ink is larger may have higher brilliance.

According to the present invention, it is possible to obtain a decorative material that can strongly impress that both visual and tactile sensations are hairline-like.

FIG. 1 is an enlarged plan view showing a part of the surface of the decorative material 10. FIG. 2 is an enlarged view of a part of FIG. FIG. 3 is a diagram showing a part of the uneven shape of the plurality of linear recesses along the line BB of FIG. FIG. 4 is a perspective view showing a part of the decorative material 10 schematically represented for explaining the morphology of the pattern forming layer 12. FIG. 5 is a diagram illustrating one of the morphological examples of the linear recess 13. FIG. 6 is a diagram illustrating one of the morphological examples of the linear recess 13. FIG. 7 is a diagram illustrating one of the form examples of the ink unit 14. FIG. 8 is a diagram illustrating the decorative material 10'. FIG. 9 is a diagram showing a part of the shading image data (concavo-convex pattern image data). FIG. 10 is a diagram illustrating a scene in which a concave-convex pattern is formed on a mold by a laser.

Hereinafter, the present disclosure will be described based on the form shown in the drawings. The present invention is not limited to these forms. In the drawings shown below, the size and ratio of the members may be changed or exaggerated for the sake of clarity. In addition, for the sake of readability, illustrations of parts that are not necessary for explanation and reference numerals that are repeated may be omitted.

[Structure of decorative material]
FIG. 1 is an enlarged view (plan view) of a part of the decorative material 10 according to one form and viewed from the pattern forming layer 12 side.
For convenience, arrows (x, y, z) indicating directions, that is, a coordinate system, are also shown in FIGS. 1 and the following figures for convenience. Here, the xy direction is the in-plane direction of the decorative material 10, and the z direction is the thickness direction. Therefore, FIG. 1 is a view (planar view) of the decorative material 10 on the pattern forming layer 12 side, particularly from the z direction.
As can be seen from FIG. 1, the decorative material 10 of the present embodiment is formed to have an uneven pattern that forms a hairline tone in a plan view as a whole.

FIG. 2 shows an enlarged view of the portion shown by FIG. 1 in FIG. FIG. 3 shows a part of the unevenness (z direction) of the linear recess 13 in the pattern forming layer 12 along the line (x direction) shown by BB in FIG. 2 (however, FIG. 3). Is a concave-convex shape excluding the ink portion 14).
Further, FIG. 4 shows a perspective view schematically showing an enlarged part of the decorative material 10 in order to explain the configuration of the decorative material 10 in an easy-to-understand manner.
As can be seen from FIGS. 1 to 4, the decorative material 10 is configured to have a base material 11 and a pattern forming layer 12 provided on one surface of the base material 11. Therefore, in this embodiment, one surface of the base material 11 is configured to function as the pattern forming layer 12. In other words, in this embodiment, the base material 11 itself has a single-layer structure that also serves as the pattern forming layer 12. In addition, the present invention is not limited to this, and the base material 11 and the pattern forming layer 12 may be made into separate independent layers, and both layers may be laminated to form a plurality of layers.

Hereinafter, each configuration will be described in more detail.

<Base material>
The base material 11 is a sheet-like member having a function of holding the pattern forming layer 12 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 order from the one with relatively thin thickness, but in this embodiment, the difference depending on the thickness form of these base materials is not an essential matter but an important matter. No. Therefore, the essence of the present invention and the interpretation of the claims remain unchanged even if any of the terms film, sheet, and plate is appropriately read as other terms in the present specification.
Further, in a form in which the base material 11 and the pattern forming layer 12 are also used as a single layer as described later and also shown in FIG. 4, the pattern forming layer 12 itself is also the base material 11. The base material 11 also includes such a form.

The material of the base material 11 is not particularly limited as long as it has the same function as the conventionally known decorative material. For example, as the material of the base material, usually polyethylene, polypropylene, olefin-based thermoplastic elastomer, polyolefin-based resin such as ionomer, acrylic resin such as polymethylmethacrylate and polybutylmethacrylate, polyethylene terephthalate, polybutylene terephthalate, and ethylene glycol- Telephthalic acid-isophthalic acid copolymer, thermoplastic polyester resin such as polyester-based thermoplastic elastomer, polyvinyl chloride (monopolymer of vinyl chloride), vinyl chloride-vinyl acetate copolymer, ethylene-vinyl chloride copolymer, etc. Vinyl chloride resin, thermoplastic urethane resin, polycarbonate resin, ABS resin (acrylonitrile-butadiene-styrene copolymer), thermoplastic resin such as styrene resin, melamine resin, unsaturated polyester resin, epoxy resin, two-component curable type Thermoplastic resin such as urethane resin, or ionized radiation curable resin that cures monomer or prepolymer such as radical polymerization type acrylate type or cationic polymerization type epoxy type with ionizing radiation (ultraviolet rays, electron beam, etc.) Etc. are used. When the material of the base material is resin, it may be colored with a known colorant. In addition, paper, non-woven fabric, metal, wood, etc. can also be used in the form of sheets, boards, three-dimensional objects, etc. by appropriately laminating them with the above resin materials.

When the base material is colored with a known colorant, the hue of the base material due to this coloring may be configured to have a predetermined relationship with the hue of the ink portion 14 provided in the pattern forming layer 12 described later. The specific contents will be described later in the ink section 14.

The thickness of the base material is not particularly limited, but in the case of a sheet-shaped base material or a film-shaped base material, for example, the thickness is about 20 μm or more and 1000 μm or less, and in the case of a plate-shaped base material, for example, The thickness can be about 1 mm or more and 20 mm or less.

<Pattern formation layer>
The pattern forming layer 12 is provided on one surface of the base material 11 in the present embodiment and is a layer that imparts an uneven pattern to the decorative material. In the vicinity of the surface on the + z direction side), the decorative material 10 is formed to have a hairline-like uneven pattern in a plan view, and the base material 11 also serves as the pattern forming layer 12 (in other words, the base material 11 itself). The vicinity of the surface of the pattern forming layer 12 constitutes the pattern forming layer 12.). In particular, as can be clearly seen from FIG. 4, the pattern forming layer 12 includes a recess 13 and an ink portion 14 arranged inside the recess 13. Each will be described below.

{Linear recess}
As can be seen from FIGS. 1 to 4, the pattern forming layer 12 is provided with a plurality of linear recesses 13 which are linear grooves. In this embodiment, the linear recess 13 has the following configuration. By having a plurality of linear recesses 13 on the surface of the decorative material 10, it is possible to impart a hairline-like design to the decorative material 10 not only from the viewpoint of visual appearance but also from the viewpoint of tactile sensation.

In this embodiment, the linear recess 13 is formed so as to extend in parallel or substantially parallel to one direction (y direction in this embodiment). Therefore, the linear recess 13 is a linear groove (concave streak) having a length in the y direction, a width in the x direction, and a depth in the z direction. Here, the length of one linear recess 13 is not particularly limited. That is, both ends of the linear recess 13 in the length direction may be formed so as to reach the ends (edges) of the decorative material, and the other end reaches the end of the decorative material without reaching the end of the decorative material. The length may be such that both ends do not reach the edges of the decorative material. And these do not need to be any one in one decorative material 10, and may be mixed in one decorative material 10.
The term "extending substantially parallel" in one direction does not mean that the extending directions of the plurality of linear recesses 13 are all aligned in the same direction (this is a state in which they extend completely in parallel). It means that the distribution of each linear recess 13 in the extending direction is within 10 degrees in a plan view. In order to reproduce the hairline-like design appearance, it is more preferable that the distribution of each linear recess 13 in the extending direction is within 5 degrees in a plan view.

The width (size in the width direction) of the linear recess 13 is not particularly limited, and can be typically in the range of 10 μm or more and 200 μm or less. The widths of the plurality of linear recesses 13 may be the same, but may be different as shown in FIGS. 3 and 4.

Further, FIG. 5 is a diagram illustrating one form example, and shows a diagram focusing on one linear recess 13. The central view of FIG. 5 is a plan view of the linear recess 13, the lower view of FIG. 5 is an xz plan view at one end of the linear recess 13, and FIG. 5 is a plan view of the linear recess 13 at the other end. The xz plan view is shown respectively. As can be seen from FIG. 5, when paying attention to one linear recess 13, the width changes as it moves in the longitudinal direction (the direction in which the linear recess 13 extends) (the width increases and the width decreases). May be. This change may be continuous as shown in FIG. 5, may be gradual, or may be irregular. Therefore, the change in width is not limited to increasing from one side to the other side, and may change so as to increase in the middle and decrease in the middle.
Such a linear recess 13 may be included in at least a part of the decorative material 10.

The depth (size in the depth direction) of the linear recess 13 is not particularly limited, and may be, for example, in the range of 5 μm or more and 100 μm or less. The depths of the plurality of linear recesses 13 may be the same, but may be different as shown in FIGS. 3 and 4.
Further, FIG. 6 is a diagram for explaining one form example, and is a diagram focusing on one linear recess 13. The central view of FIG. 6 is a view obtained by cutting the linear recess 13 along the longitudinal direction (y direction) in the yz plane, and the left portion of FIG. 6 is the xz at one end of the linear recess 13. The plan view and the right side view of FIG. 6 represent an xz plan view at the other end of the linear recess 13. As can be seen from FIG. 6, when paying attention to one linear recess 13, the depth may change as it moves in the longitudinal direction (the direction in which the linear recess 13 extends). This change may be continuous, gradual, or irregular, as shown in FIG. Therefore, the change in depth is not limited to becoming deeper from one side to the other side, and may be changed so as to become deeper in the middle and shallower in the middle.
Such a linear recess 13 may be included in at least a part of the decorative material 10.

The cross-sectional shape of the linear recess 13 in the direction orthogonal to the longitudinal direction (y direction) (x direction) is not particularly limited, and is semicircular, semi-elliptical, triangular, quadrangular, pentagonal, hexagonal or other polygonal. It can take any shape, including irregular geometric shapes.
Among them, as shown in the upper part of FIG. 5, the ratio of the width W to the depth D (W / D) preferably satisfies the following relationship.
0 <W / D ≦ 15
As a result, the reproducibility of the hairline-like design appearance can be further enhanced. However, the depth D and the width W are set to be larger than the average value of the maximum diagonal lengths of the bright pigment particles so that the bright pigment in the bright ink is surely filled in the linear recess 13. Is preferable. For example, when the particles of the bright pigment have a polygonal prism shape whose height is smaller than the minimum diagonal lengths of the upper base and the lower base, the maximum diagonal lengths of the polygons of the upper base and the lower base are averaged with respect to all the particles. The depth D and the width W may be larger than the values obtained.

{Ink part}
The ink portion 14 is a portion made of ink containing brilliant ink, which is arranged inside the linear recess 13. Here, "brightness" means that the reflectance of light is relatively high, and the color tone (hue, lightness, or saturation) is one depending on the combination of the incident direction of the illumination light and the line-of-sight direction of the observer. (1 or more), brightness, gloss, etc. change, and the decorative material 10 exhibits a unique design as if it were a metal product.

In this embodiment, as the glitter ink of the ink unit 14, the glitter ink in which the glitter pigment is dispersed in the resin binder is applied.

Glitter pigments include mica (mica) whose surface is coated with a thin film of titanium oxide or iron oxide, shells such as pearl shells, bismuth acidified, and pearl pigments consisting of scaly foil pieces such as basic lead carbonate (pearl luster). Pigment), or scaly foil pieces of metal such as aluminum, brass, gold, silver, copper, tin, nickel, scaly foil pieces of metal-deposited resin film, and resin films with different refractive elements are laminated in multiple layers. A scaly foil piece or the like having an interfering luster can be used.
The average particle size of these brilliant pigments can be appropriately used depending on the desired brilliance, printability, etc., but usually, those having a brilliance of about 10 μm or more and 60 μm or less are preferable for brilliant expression. Here, the average particle size of the particles is a value of the volume-based median diameter (D50) measured by laser diffraction / scattering type particle size distribution measurement. The median diameter (D50) is a diameter (volume average diameter) at which the cumulative volume of the particles is half (50%) of the total when the particles are arranged in order from the smallest particle size.

Examples of the resin binder include acrylic resins such as polymethylmethacrylate and polybutylmethacrylate, cellulose-based resins such as nitrified cotton (cellulose nitrate) and cellulose acetate, thermoplastic resins such as vinyl chloride-vinyl acetate copolymers, and thermoplastic polyester resins. , Thermosetting resins such as two-component curable urethane resin, melamine resin, and thermosetting polyester resin with polyol compound as the main agent and isocyanate compound as the curing agent, acrylate-based monomer or prepolymer, epoxy-based prepolymer, An ionizing radiation curable resin or the like, which comprises a composition containing any one or more of unsaturated polyester resins and the like and is cured by cross-linking or polymerizing with ionizing radiation such as ultraviolet rays and electron beams, can be used.

The ink portion may further contain a colorant that is not brilliant (non-brilliant) and has a desired hue. The colorant is not particularly limited, and is composed of particles such as carbon black, iron black, titanium white, antimony white, zinc flower, yellow lead, titanium yellow, petal handle, cadmium red, ultramarine blue, and cobalt blue. Examples thereof include one kind of organic pigments or dyes such as inorganic pigments, quinacridone red, isoindolinone yellow, phthalocyanine blue, aniline black, azomethine azo black, and perylene black, or a colorant obtained by mixing two or more kinds thereof.
By containing a brilliant pigment and a colorant in the brilliant ink, the linear recess filled with the brilliant ink obtains a metallic luster, a pearl luster, or a similar luster due to the brilliant pigment. In addition, by expressing the hue caused by the colorant, a so-called "color metallic tone" or "color pearl tone" design appearance is exhibited.

When the glitter ink contains a colorant, the contents of the glitter pigment and the colorant can be appropriately adjusted according to the desired hairline-like appearance and design. Usually, the content of the bright pigment is in the range of 0.1 part by mass to 50 parts by mass, and the content of the colorant is in the range of 0.1 part by mass to 50 parts by mass with respect to 100 parts by mass of the resin binder. Can be done. The ratio of the glitter pigment content to the colorant content may be appropriately selected according to the desired hairline-like appearance and design, but the ratio of the glitter pigment content / colorant content is 5/95 to 95. It is in the range of / 5.

As described above, it is sufficient that the ink portion is formed by arranging the material containing the glitter ink in the linear recess. As a result, it is possible to make a decorative material that can give a stronger impression of being a hairline.

In addition to the above, the ink portion can also have the following aspects.
The brilliance of the ink portion may be set within a predetermined range. Specifically, as shown in FIG. 7, a cross section (cross section in the xz plane) orthogonal to the longitudinal direction of the linear recess 13 of the decorative material 10 is taken, and the plurality of linear recesses 13 appearing here are adjacent to each other. Consider two linear recesses 13.

Regarding the brilliance caused by the brilliant ink filled in the linear recess 13, the brilliant appearance visually recognized when the decorative material 10 is viewed in a plan view is filled per unit length in the longitudinal direction of the linear recess 13. The larger the volume of the brilliant ink filled, the greater the brilliance. The brilliant ink filling volume filled per unit length in the longitudinal direction of the linear recess 13 is proportional to the area E of the ink portion 14 in the cross section of the linear recess 13 as shown in FIG. 7. The area E is integrated in the depth direction z over the entire area of the glitter ink (filling) portion 14 (the entire filling depth D) with the width W (z) of the linear recess 13 as a function of the depth direction z. It becomes the value.
However, as in the example of FIG. 7, when the function W (z) in the depth direction of the width of the linear recess 13 is substantially the same, the area E of the ink portion 14 in the cross section of the linear recess 13 is ink. Even if it is proportional to the depth D of the portion 14, there is no problem in terms of design accuracy with respect to the actual visual appearance of the decorative material.

Further, the degree of change in the intensity of the brilliance of the decorative material 10 in the in-plane direction of the decorative material 10 in the visual appearance in a plan view (that is, whether the brilliance is uniform over the entire in-plane or the place in the in-plane). Whether the intensity of brilliance changes significantly for each) is determined by the intensity of brilliance between the two adjacent linear recesses 13 as shown in FIG. 7, that is, the ink portion 14 between the two adjacent linear recesses 13. Has a positive correlation with the area E of. The difference in the intensity of the brilliance between the two linear recesses 13 that are far apart from each other is the magnitude of the in-plane change in the brilliance in the plan view in the visual appearance even when the difference is relatively large. The impact is small.
By changing the depth of the adjacent linear recesses 13 as shown in FIG. 7, the amount of brilliant ink (pigment density) filled in the two adjacent linear recesses 13 is different, and three-dimensionally. By giving a density gradation, it is possible to express a more realistic metallic texture and texture.

In the case of the form shown in FIG. 7, the depth of one of the two adjacent linear recesses 13 (on the left side in the same figure) is D ₁ , and the depth of the ink portion 14 in this cross section is D 1. The area is E ₁ , the depth of the linear recess 13 on the other side (on the right side in the figure) is D ₂ , and the area of the ink portion 14 in this cross section is E ₂ . In the case of FIG. 7, since the function W (z) in the depth direction of the width of the linear recess 13 is the same, the linear recess 13 is deeper (in this example, the linear recess _{at the depth D 2 on the right side).} Is configured so that the area of the ink portion 14 becomes large (that is, E ₁ <E _{2 in this example).}

Furthermore, evaluation of the bright in this section can be configured to be higher luster of (D linear recess ₂ in this example) deeper also linear recess 13.
Here, since the decorative material of the present disclosure should visually recognize the appearance of the design sensually and be appreciated, the evaluator visually evaluates the brilliance of the decorative material 10, that is, light. The reflectance of the light is relatively high, and the color tone (one or more of hue, lightness, and saturation), brightness, gloss, etc. change depending on the combination of the incident direction of the illumination light and the line-of-sight direction of the observer. The magnitude of the degree is sensually evaluated.
It should be noted that such visual sensory evaluation is subjective, and there are individual differences and dependence on the evaluation environment. Therefore, when it is necessary to objectively compare and evaluate the brilliance of cosmetic materials, the evaluator shall be composed of a plurality of people with different ages, genders, occupations, hobbies and tastes, preferably 5 or more people, and the evaluation shall be made. It is appropriate to use the value obtained by quantifying and averaging by stepwise relative evaluation such as "A, B, C" and "1, 2, 3, 4, 5" as the evaluation of brilliance.

However, when quantitative evaluation of brilliance is required as a physical numerical value due to the necessity in product design and quality control, for example, the following measurement evaluation method can be applied.
(1) F.Rite measured with a MA-68II multi-angle spectrophotometer manufactured by X-Rite. Evaluation using the I value as an index.
(2) Evaluation using the "luminance" and "whiteness" obtained by the measurement and evaluation method of the brilliant coating film described in Japanese Patent No. 4152786 (Japanese Patent Laid-Open No. 2004-286672) as indexes.

When the base material 11 is colored with a colorant as the base material 11, a decorative material exhibiting various design appearances is obtained corresponding to the combination of the hue of the base material 11 and the relationship between the ink portion 14 and the color tone. be able to.
For example, there are the following forms.

(Form 1) Form in which the color difference between the base material 11 and the ink portion 14 is small Here, the fact that the color difference is small is defined by the CIE (International Commission on Illumination) in 1976, and is also adopted in JIS Z8781-5: 2013. ^{* A *} b ^{* In the} color system, the color tone of the base material 11 is (L ^* ₁₁ , a ^* ₁₁ , b ^* ₁₁ ), and the color tone of the ink portion 14 is (L ^* ₁₄ , a ^* ₁₄ , b ^* _14). )
ΔE ^* = [(L ^* _14- L ^* ₁₁ ) ² + (a ^* _14- a ^* ₁₁ ) ² + (b ^* _14- a ^* ₁₁ ) ² ] ^0.5
The color difference ΔE ^* defined as satisfies the following relationship.
ΔE ^* ≤ 3,
More preferably
ΔE ^* ≤ 2
Is.

In the case of the first form, since the color difference between the base material 11 in the decorative material 10 and the ink portion 14 filled with the glitter ink is relatively small, the surface of the decorative material is worn or scratched and filled in the linear recess 13. When a part of the ink portion 14 (brilliant ink) is lost, such wear and scratches are inconspicuous, which is a unique effect.

(Form 2) Form in which the color difference between the base material 11 and the ink portion 14 is large Form 2 is a ^{case where the color difference ΔE *} satisfies the following relationship.
ΔE ^* > 3,
More preferably
ΔE ^* > 5
Is.

In the case of the second form, since the color difference between the base material 11 in the decorative material 10 and the ink portion 14 filled with the glitter ink is relatively large, the ink portion 14 has a visual contrast with respect to the background base material 11 in appearance. big. Therefore, it has a unique effect that the design appearance of many scratches (streaks) on the surface of the metal plate can be reproduced well.

Form 2 is further divided into the following two forms (form 2-1 and form 2-2) according to the magnitude of the hue difference Δθ.
(Form 2-1) Form in which the hue difference Δθ is small In Form 2-1, in addition to the condition of ^{color difference ΔE * > 3, L *} a ^* b ^* color system L ^* a ^* b ^* three-dimensional coordinates theta ₁₁ for substrate 11 hue theta corresponding to the deflection angle theta in the _system, when the theta ₁₄ for ink unit 14, the hue difference Δθ therebetween,
Δθ = | θ ₁₄ −θ ₁₁ | ≦ 45 degrees,
More preferably
Δθ = | θ ₁₄ −θ ₁₁ | ≦ 20 degrees.

In the case of Form 2-1 the color difference between the base material 11 and the ink portion 14 in the decorative material 10 is relatively large (ΔE ^* > 3), so that the design appearance of the hairline processing on the surface of the metal plate is well reproducible. The color difference Δθ between the base material 11 and the ink portion 14 is relatively small (color difference Δθ ≦ 45 degrees). Therefore, when the surface of the decorative material is worn or scratched and a part of the ink portion 14 (brilliant ink) filled in the linear recess 13 is lost, the wear or scratch is not noticeable at first glance. Two contradictory effects are produced at the same time.
^{In the case of Form 2-1 in order to increase the color difference ΔE *} between the base material 11 and the ink portion 14 under the condition that the hue difference Δθ between the base material 11 and the ink portion 14 is relatively small, the base material is used. The color tone is designed so as to increase the difference in lightness, the difference in saturation, or the difference in lightness and saturation between 11 and the ink portion 14.

(Form 2-2) Form in which the hue difference Δθ is large In the case of Form 2-2, in addition to the color difference between the base material 11 and the ink portion 14 in the decorative material 10 being relatively large (ΔE ^* > 3). Further, the hue difference Δθ between the base material 11 and the ink portion 14 is also relatively large (hue difference Δθ> 45 degrees, for example, the base material 11 has a hue green and the ink portion 14 has a brilliant ink with a hue red). Therefore, the visual contrast between the ink portion 14 and the background base material 11 is further increased. Therefore, the design appearance reproducibility of the hairline processing on the surface of the metal plate is further improved, and a novel design appearance different from the actual hairline processed metal plate having the same hue inside and outside the linear recess can be reproduced. Play the effect of.
^{In the case of Form 2-2, the color difference ΔE *} between the base material 11 and the ink portion 14 is the ink between the base material 11 and the ink portion 14 due to the contribution that the color difference Δθ between the base material 11 and the ink portion 14 is relatively large. Since the difference in brightness and saturation from the portion 14 increases regardless of the magnitude, the difference in brightness, the difference in saturation, or the difference in brightness and saturation between the base material 11 and the ink portion 14 can be increased or decreased. Both can be selected. In this form, the difference in brightness and saturation between the base material 11 and the ink portion 14 may be appropriately designed according to the desired design appearance of the decorative material.

Further, it is preferable that the brilliant ink constituting the ink portion 14 does not exist on a portion other than the inside of the linear recess 13 (for example, a surface that becomes a relative convex portion between adjacent recesses 13). However, since there is a possibility that some materials (pigments and binders) constituting the glitter ink may remain in the manufacturing process, it is permissible to have them within such an error range. This is because the influence on the effect of the present invention is small within the range of such an error.

With the pattern forming layer 12 as described above, the decorative material for expressing the hairline can be different from the conventional one, and in particular, the decorative material having an appearance in which the characteristics of the hairline are strongly expressed can be obtained.

<Modification example>
FIG. 8 shows a diagram for explaining the decorative material 10'of the modified example. In the decorative material 10'of this example, the protective layer 15 is laminated on the decorative material 10. This protects the decorative material from contamination and scratches.

Such a protective layer 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 mentioned.
If the base material 11 and the pattern forming layer 12 alone can ensure sufficient surface durability such as stain resistance and scratch resistance in the intended application, the protective layer can be omitted.

Examples of the thermoplastic resin include acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate, polyolefin resins such as polypropylene and polyethylene, fluororesins such as polyfluorinated vinyl and polyfluorinated vinylidene, and polyethylene terephthalate (polyfluorinated resin). PET), thermoplastic polyester resin such as urethane-modified aromatic copolymerized polyester (for example, "Byron" (registered trademark) manufactured by Toyo Boseki Co., Ltd.), polycarbonate resin, vinyl chloride resin, acrylonitrile- Examples thereof include butadiene-styrene resin (ABS resin) and acrylonitrile-styrene-acrylic acid ester resin. In addition, "(meth) acrylic" means acrylic or methacryl.

The layer made of a curable resin is a layer obtained by curing the 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 the thermosetting resin include unsaturated polyester resin, polyurethane resin (including two-component curable polyurethane), epoxy resin, aminoalkyd resin, phenol resin, urea resin, diallyl phthalate resin, melamine resin, and guanamine resin. Examples thereof include melamine-urea cocondensate resin, silicon resin and polysiloxane resin. The thermosetting resin composition contains, if necessary, components involved in the curing reaction of the thermosetting resin, for example, a catalyst, a curing agent (including a cross-linking agent, a polymerization initiator, a polymerization accelerator, etc.) and the like. You may.
The ionizing radiation curable resin is a resin that undergoes a cross-linking polymerization reaction by irradiation with ionizing radiation and changes into a three-dimensional polymer structure. Ionizing radiation has energy quanta that can polymerize or cross-link molecules among electromagnetic waves and charged particle rays, and in addition to ultraviolet rays (UV) and electron beams (EB), electromagnetic waves such as X-rays and γ-rays, α Although it also includes charged particle rays such as rays and ion rays, ultraviolet rays (UV) or electron beams (EB) are usually used. Among the ionizing radiation curable resins, the electron beam curable resin can be made solvent-free, does not require a photopolymerization initiator, and has stable curing characteristics.
The ionizing radiation curable resin is, for example, one kind such as a monomer, an oligomer, or a prepolymer having a polymerizable unsaturated bond such as a (meth) acryloyl group, an epoxy group, or the like in the molecule, which can be crosslinked by irradiation with ionizing radiation. A composition containing the above can be used.

The thickness of the protective layer 15 is not particularly limited, but can be 0.1 μm or more and 20 μm or less. If it is thin, it has high durability due to bending, etc. but weak in scratch resistance, and if it is thick, it is resistant to scratches and scratches, but it is weak against deformation such as bending and cracks occur. It can be a protective layer. Therefore, it may be 1 μm or more and 10 μm or less.

[Manufacturing method of decorative material 10]
Next, an example of a method for producing a decorative material will be described using the decorative material 10 as an example. However, the method for producing the decorative material is not limited to this.
The manufacturing method described below includes a step of producing a shade image, a step of producing a block copy image, a step of producing a plate, a step of forming a pattern forming layer, and a step of filling ink.

<Process for creating a shade image>
In the step of producing a shading image, a concavo-convex pattern (hairline-like concavo-convex pattern) in a plan view to be expressed on the pattern forming layer 12 is created as a shading image consisting of large and small optical densities. For example, in this embodiment, the graphic design drawing software "Illustrator" manufactured by Adobe Systems Incorporated can be used to create shade image data having a resolution of 2540 dpi in 8 bit image shade gradation (256 gradation) in TIFF format. ..

<Process of creating block copy image>
In the process of producing the block copy image, the obtained original image is converted into a convex stripe pattern as a binary image corresponding to the density gradation image of the pattern by a conversion program from density to unevenness, that is, the plate depth of the embossed plate. The block copy depth is generated and arranged on the two-dimensional virtual plane XY plane, and the block copy image is obtained as digital data.
At that time, the minimum value of the optical density (for example, 0) corresponds to the minimum value of the plate depth data (for example, 0 μm), and the maximum value of the optical density (for example, 255) corresponds to the maximum value of the plate depth data (for example, 250 μm). ) Corresponds to the shading image data consisting of the distribution of the optical density P (X, Y) at each coordinate (X, Y) on the two-dimensional plane from the distribution of the plate depth D (X, Y) at the same coordinate. It is converted into the embossed version depth data H (X, Y).

Here, a plan view image of the pattern forming layer as shown in FIG. 9 is generated as a binary image according to the conditions for generating convex lines. In FIG. 9, the shading of the image represents the plate depth of the embossed plate (the optical density is associated with the plate depth). The line segment portion of the uneven shape generated in this way corresponds to a convex line in the decorative material. In this way, the block copy image is obtained.

<Process of making a plate>
In the step of producing the plate, an embossed plate (molding mold for decorative material) having an uneven pattern on the surface, which has a plan view shape like the decorative material of FIG. 1 and the unevenness is reversed, is produced based on the block copy image. Specifically, the manufacturing process of the uneven pattern includes the following steps (1) to (4).

(1) Metal Roll Preparation Step A metal roll 20 for embossing plate engraving as shown in FIG. 10 was prepared. The metal roll 20 is formed by plating a copper layer on the surface of a hollow iron cylinder having rotary drive shafts (shafts) 21 at both ends in the axial direction. The surface of the metal roll 20 was polished with a grindstone to roughen it, and a treatment was performed to prevent a decrease in engraving efficiency due to specular reflection of laser light for engraving.

(2) Laser light engraving process As schematically shown in FIG. 10, a concavo-convex pattern image created in the block copy image creation step on the surface of the metal roll 20 prepared in step (1) using a laser light direct engraving machine. Engrave based on the data. As a result, the surface of the decorative material has the same plan-like shape as the uneven pattern on the surface of the decorative material as shown in FIG. Form a shape.
Therefore, the shape to be provided by the uneven pattern in the embossed plate is a mode in which the uneven relationship of the uneven pattern in the above-mentioned decorative material is reversed, and can be considered in the same manner.

The metal roll 20 is driven by an electric motor via the rotation drive shaft 21, and rotates around the rotation drive shaft 21 as a central axis. The surface of the metal roll 20 is scanned by a fiber laser beam P having an oscillation wavelength of 1024 nm, a laser spot diameter of 10 μm, and an output of 360 W emitted from the laser head 22. In that case, the laser beam is switched ON-OFF (switching between irradiation and non-irradiation) according to the density value of the uneven pattern image data created in step (1), and the irradiation position is subjected to one laser beam irradiation. The evaporation of the metal forms a recess with a depth of 10 μm. In this example, scanning of the metal roll surface with the laser beam is repeated, for example, 10 times. Further, in order to prevent the evaporated metal from becoming powder and remaining or adhering to the surface of the metal roll 20, the engraving liquid T was sprayed from the engraving liquid discharge port 23 onto the laser light irradiation region on the surface of the metal roll 20. Laser irradiation is performed in this state.
At that time, for example, in the position coordinates of the image density corresponding to the plate depth of 50 μm on the uneven pattern image data, the laser beam is irradiated (ON) only for the first 5 times out of a total of 25 scans, and the remaining 20 times. The batch is controlled so that the laser beam is not irradiated (OFF) to obtain a desired depth.
The scanning of the laser beam is completed, and a desired uneven shape is formed on the surface of the metal roll 20.

(3) Electropolishing Step After cleaning the engraving liquid, electropolishing is performed to remove metal residues adhering to the surface of the metal roll 20.

(4) Chromium Plating Step After the step (3), a chrome layer having a thickness of 10 μm was formed on the surface of the metal roll by plating.

As described above, it is possible to obtain a plate (molding mold for decorative material, embossed plate in this embodiment) having an uneven shape in which the unevenness of the uneven pattern formed on the surface of the pattern forming layer 12 is inverted.

<Step of forming a pattern forming layer>
Next, in the step of forming the pattern forming layer, the decorative material 10 is obtained by embossing the base material 11 using the produced plate (embossed plate). The embossing may be performed by an appropriate known method, and is not particularly limited. A typical method of embossing is as follows, for example.
A resin sheet made of a thermoplastic resin such as a polyolefin resin is used as the base material. This base material is heated and softened, and an embossed plate is pressed against the surface of the base material to form an uneven pattern on the surface of the embossed plate on the surface of the resin sheet. Then, the resin sheet is cooled and solidified to fix the uneven pattern on the resin sheet. After that, the resin sheet having the uneven pattern is removed from the embossed plate.
Here, the various embossing methods will be further described, for example, the following methods (A) to (E).

(A) The resin sheet as the base material is heated and softened, and the embossing plate is pressed to emboss.
(B) Embossing and laminating by heat-sealing a resin sheet (base material) to be a surface sheet and a resin sheet (second base material) to be a base sheet by the heat pressure when pressing the embossed plate. Embossing is performed by the doubling embossing method, which is performed at the same time.
(C) A resin sheet (base material) to be used as a surface sheet is melt-extruded from a T-die and brought into contact with a cylinder-shaped embossed plate that also serves as a cooling roller to be embossed at the same time as the surface sheet is formed. At this time, the resin sheet (second base material) used as the base sheet inserted into the back surface side of the front surface sheet is further heat-sealed to perform doubling embossing at the same time as the film formation.
(D) As disclosed in Japanese Patent Application Laid-Open No. 57-87318, Japanese Patent Application Laid-Open No. 7-32476, etc., an uncured liquid material of an ionizing radiation curable resin is applied to the surface of a cylinder-shaped embossed plate. Further, a base sheet made of a resin sheet or the like is laminated on the base sheet and irradiated with ionizing radiation to cure the uncured liquid material to obtain a cured product. At that time, after the cured product is adhered to the base sheet, it is separated from the embossed plate to form a base material composed of the base sheet and the cured product on the base sheet, thereby embossing the base material.
(E) A plurality of impregnated papers obtained by impregnating paper such as titanium paper with an uncured product of a thermosetting resin such as melamine resin on a backing material such as core paper or wood plywood. By hot-press molding the layers, each layer is laminated and integrated to produce a thermosetting resin decorative material. At that time, by inserting an embossing plate on the surface side of the impregnated paper, when the thermosetting resin is impregnated and cured to form a decorative material, the surface is embossed at the same time as hot pressing.

A thermoplastic resin is typically used as the material of the base material used in the embossing methods (A) to (C), and the material of the base material used in the embossing method of (D) is typically used. An ionizing radiation curable resin is used, and a thermosetting resin is typically used as the material of the base material used in the embossing method (E).

<Ink filling process>
In the step of filling the ink, the linear recess 13 formed on the surface of the base material 11 is filled with the glittering ink to form the ink portion 14. This is to supply the ink (uncured state) of the material to be the ink portion 14 to the surface of the base material 11 on the side where the linear recess 13 is formed, and scratch (wipe) the ink with a doctor blade. To be done by. As a result, excess ink can be removed and the ink can be pushed into the linear recess 13. Then, the doctor blade is moved in parallel with the direction (y direction) in which the linear recess 13 extends. That is, this makes it possible to easily form the shape of the ink portion 14 as described above.
Then, the decorative material 10 is obtained by curing the ink by an appropriate method.

The decorative material 10 can be obtained as described above.

[Use of decorative materials]
The use of the decorative materials described above is not particularly limited, but for example, interior materials for buildings such as walls, floors and ceilings, exterior materials such as exterior walls, roofs, gates, walls and fences of buildings, doors and window frames. , Door frames and other fittings, peripheral edges, skirting boards, handrails and other fittings or surface materials for construction members, TV receivers, refrigerators and other home appliances, and copying machines and other office equipment housing surface materials, porcelain, cupboards, etc. , Surface materials for furniture such as desks and dining tables, surface materials for containers such as boxes, glass bottles and resin bottles, interior materials or exterior materials for vehicles such as automobiles and railroad vehicles, and transport machines such as ships and aircraft.

10, 10'decorative material 11 base material 12 pattern forming layer 13 linear recess (concave and convex pattern)
14 Ink part

Claims (6)

A decorative material with a hairline-like uneven pattern formed on the surface.
The pattern forming layer having the uneven pattern is provided, and the pattern forming layer is provided.
In the pattern forming layer, a plurality of linear recesses, which are linear grooves extending in one direction as the uneven pattern, are arranged.
A decorative material in which ink is arranged inside the linear recess, and the ink contains a brilliant ink. The decorative material according to claim 1, wherein at least a part of the plurality of the linear recesses changes in width as the linear recesses move in the extending direction. The decorative material according to claim 1 or 2, wherein at least a part of the plurality of the linear recesses changes in depth as the linear recesses move in the extending direction. In at least a part of the plurality of linear recesses appearing in the cross section orthogonal to the extending direction of the linear recess, the area of the ink is larger in the deep linear recesses in the adjacent linear recesses. The decorative material according to any one of claims 1 to 3, which is configured in the above. The decorative material according to claim 4, wherein the linear concave portion having a larger area of the ink has higher brilliance. The decorative material according to any one of claims 1 to 5, wherein the ink also contains a non-brilliant colorant.

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