JP2019177597A - Decorative material and method for manufacturing decorative material - Google Patents

Abstract

To provide a decorative material having fingerprint resistance, which makes traces of fingerprints less visible regardless of types of materials.SOLUTION: A decorative material having a rugged pattern formed on the surface is provided, which includes a substrate and a linear groove part having a plurality of recessed lines arranged on a surface of the substrate. The recessed line has a finite length and a curved portion in a plan view, and the plurality of recessed lines in the linear groove part have a pattern showing a fingerprint resistance represented by a color difference ΔE of 1.50 or less.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a decorative material, and more particularly to a decorative material in which fingerprints are not noticeable (has fingerprint resistance).

  Cosmetic materials are widely used as surface decoration materials such as furniture and building materials. For example, Patent Document 1 discloses a technique related to a decorative material using a melamine resin. A cosmetic material made of a melamine resin has advantages such as excellent heat resistance, weather resistance, stain resistance, and the like, and is characterized by good productivity.

JP 58-197053 A

  However, cosmetic materials made of these melamine resins have a problem that fingerprint traces are conspicuous when touched by hand, and fingerprint resistance is low. In particular, the tendency is remarkable in the so-called low gloss matte surface decorative material formed by forming fine irregularities such as satin and grain on the surface.

  Although it is possible to make the traces of fingerprints inconspicuous by changing the material of the decorative material to a resin other than melamine resin (improving fingerprint resistance), the productivity decreases with any material There are problems such as.

  Accordingly, an object of the present invention is to provide a cosmetic material having fingerprint resistance, in which fingerprint traces are not noticeable regardless of the type of material. Moreover, the manufacturing method of this decorative material is provided.

  One aspect of the present invention is a decorative material having irregularities formed on the surface, and has a base material and a linear groove portion in which a plurality of concave wire strips are arranged on the surface of the base material. Has a finite length in plan view, has a curved portion, and a plurality of concave stripes in the linear groove portion has a pattern in which fingerprint resistance represented by a color difference ΔE is 1.50 or less. It is a cosmetic material.

Here, the color difference ΔE means “color difference ΔE ^* _ab in the L ^* a ^* b ^* color space”.
And, the index of “fingerprint resistance represented by color difference ΔE” is the surface after a cosmetic material using melamine resin is prepared, one drop of oleic acid is dropped on the surface, and then wiped 10 times with a waste cloth. It means that fingerprint resistance is expressed by a color difference ΔE from the surface before dropping. Therefore the colors in the L ^* a ^* b ^* color space of the surface before dropping the oleic acid was dropped oleic acid with colors in L ^* a ^* b ^* color space of the surface after dry wiping as described above The distance is ΔE (ΔE ^* _ab ).

  You may comprise so that the several concave filament of a filament groove part may have a Turing pattern.

  Moreover, a base material and a linear groove part can also be comprised so that a melamine resin may be included.

  Another aspect of the present invention is a method for manufacturing the above-described cosmetic material, the step of forming grayscale image data of a pattern of concave stripes to be represented on the cosmetic material, and a concave line based on the grayscale image data A step of producing a plate having the same concave line stripe pattern as the stripe pattern, and a step of producing a shaped sheet by applying and curing ink on the side of the produced plate provided with the concave line stripe; And a step of laminating a shaped sheet on a sheet impregnated with resin and heat-molding while applying pressure, and a method for producing a cosmetic material.

  ADVANTAGE OF THE INVENTION According to this invention, the cosmetics from which the trace of a fingerprint is not conspicuous irrespective of the material to be used can be provided.

FIG. 1 is an enlarged plan view showing a part of the surface of the decorative material 10. FIG. 2 is a perspective view showing a part of the decorative material 10 schematically illustrated for explaining the surface of the decorative material 10. FIG. 3 is a diagram illustrating an example of the form of the concave line strip 13. FIG. 4 is a diagram for explaining another example of the shape of the concave line 13. FIG. 5 is a diagram for explaining another example of the form of the concave line 13. FIG. 6A to FIG. 6D are diagrams for explaining another example of the shape of the concave line 13. FIG. 7A and FIG. 7B are diagrams for explaining an example of the form of arrangement of adjacent concave line strips 13. FIG. 8 is a diagram for explaining the plate 20. FIG. 9 is an enlarged plan view showing a part of the surface of the decorative material of the comparative example.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to these forms. In the drawings shown below, the size and ratio of members may be changed or exaggerated for easy understanding. In addition, for ease of viewing, illustrations of parts unnecessary for description and repetitive symbols may be omitted.

FIG. 1: is the figure (plan view) which expanded a part of the cosmetics 10 concerning one form, and planarly viewed from the linear groove part 12 side. For convenience, FIG. 1 also shows arrows (x, y, z) representing directions, that is, coordinate systems. Here, the xy direction is the in-plane direction of the surface of the decorative material 10, the z direction is the thickness direction, and is also the normal direction of the xy plane representing the spread in the in-plane direction of the decorative material. Accordingly, FIG. 1 is a view of the decorative material 10 as viewed from the z direction on the linear groove portion 12 side. Note that, as shown in FIG. 1, observing a cosmetic material from the thickness direction (z direction) of the cosmetic material is also referred to as a plan view and a diagram illustrating the plan view is also referred to as a plan view.
As can be seen from FIG. 1, in the decorative material 10 of this embodiment, irregularities due to the linear groove portions 12 are formed on the surface side that can be touched by human eyes and hands.

  FIG. 2 is a perspective view schematically showing a part of FIG. 1 extracted and enlarged. As can be seen from FIGS. 1 and 2, the decorative material 10 includes a base material 11 and a linear groove portion 12 formed on one surface of the base material 11.

  Hereinafter, each configuration will be described in more detail.

The base material 11 is a sheet-like member that serves as a basis for the linear groove portion 12 and has a function of imparting strength to the decorative material 10. Since the base material 11 should just have a function similar to a conventionally well-known decorative material, the material is not specifically limited. For example, as a material of the base material, polyethylene, polypropylene, olefinic thermoplastic elastomer, polyolefin resin such as ionomer, acrylic resin such as polymethyl methacrylate and polybutyl methacrylate, thermoplastic polyester resin such as polyethylene terephthalate and polybutylene terephthalate , Thermoplastic urethane resins, vinyl chloride resins, ABS resins (acrylonitrile-butadiene-styrene copolymers), thermoplastic resins such as styrene resins, melamine resins, unsaturated polyester resins, thermosetting properties such as two-component curable urethane resins Resin or ionizing radiation curable resin that is cured with ionizing radiation (ultraviolet ray, electron beam, etc.) such as radical polymerization type acrylate type or cationic polymerization type epoxy type can be used. In addition, when the material of a base material is resin, you may color with a well-known coloring agent.
In addition, paper, non-woven fabric, metal, wood and the like can be used by appropriately laminating with the above resin material in the form of a sheet, a plate, a three-dimensional object or the like.
Thus, the anti-fingerprint property can be improved in the decorative material 10 regardless of the material used.

Among these, the composition of a so-called melamine resin cosmetic material obtained by impregnating paper with an uncured liquid composition of melamine resin, which has been conventionally used from the viewpoint of heat resistance, weather resistance, and productivity. The base material which consists of can be used preferably. The layer structure of a general melamine resin decorative material includes the following layer structure and manufacturing method. Basis weight 50 g / m ² to 250 g / impregnated with uncured composition phenolic resin m ² kraft paper core sheet piled about two to five sheets comprising, are visually exposed on the surface side (in use superimposing a basis weight 50g / m ² ~250g / m ² of titanium paper impregnated with uncured composition melamine resin side) (paper and混抄titanium dioxide particles as a white hiding pigment), further the surface superimposing the overlay paper impregnated with uncured composition melamine resin basis weight 15g ^/ m ² ~50g / m 2 of about α cellulose pulp paper. Then, the laminated material is heated and pressurized to cure each uncured composition and to obtain a laminate in which the layers are bonded and integrated. Such a laminate is a melamine resin decorative material. According to the decorative material 10 in which the linear groove portion 12 of the present invention is formed on the surface of the base material 11 having such a melamine resin decorative material structure, it is possible to improve fingerprint resistance even if a melamine resin is used as a material. is there.

  Although there is no restriction | limiting in particular in the thickness of a base material, in the case of a sheet-like base material or a film-like base material, for example, thickness is 20 micrometers or more and about 1000 micrometers or less, and in the case of a plate-shaped base material, for example, 1 mm or more and 20 mm or less Something can be used.

  The linear groove portion 12 is formed on one surface of the base material 11 and imparts fingerprint resistance to the surface of the decorative material 10. The linear groove part 12 is provided with the following forms by this form.

As can be seen from FIG. 1 and FIG. 2, the linear groove portion 12 is configured by an infinite number of the plurality of concave linear stripes 13. A fingerprint resistant function is imparted to the decorative material 10 by the infinite number of the concave line strips 13 arranged.
In addition, by arranging innumerable concave filaments 13 on the surface in this way, the concave filaments 13 can diffusely reflect incident light, thereby forming a so-called matte surface. Among conventional cosmetics with matte surface irregularities such as satin and sand, especially those using melamine resin, fingerprint marks are conspicuous on such matte surfaces, and fingerprint resistance is low. It was a problem. On the other hand, according to the decorative material 10 of this embodiment, the fingerprint resistance can be improved even on the matte surface by the line groove portion 12 specific to the present invention. The matte evaluation can be performed by measuring the gloss of a cosmetic material shaped using a shaped sheet using a gloss meter (60 degrees, measuring instrument BYK Gardner, Micro Gloss).

About the form and arrangement | positioning of the several recessed wire 13 comprised in the wire groove part 12, what is necessary is just to be comprised so that it may have fingerprint resistance. That is, fingerprint resistance is improved by providing a plurality of concave line strips 13.
Here, the fingerprint resistance means the conspicuousness of the fingerprint trace, and the fingerprint trace becomes inconspicuous due to the fingerprint resistance. As a specific index of fingerprint resistance, evaluation is performed using a color difference ΔE, and ΔE should be 1.5 or less. When ΔE is 1.0 or less, fingerprint resistance is good, and ΔE is 0.2 or less. Can be evaluated as having high fingerprint resistance.
Here, the color difference ΔE means “color difference ΔE ^* _ab in the L ^* a ^* b ^* color space”, and the fingerprint resistance index represented by the color difference ΔE is a cosmetic material using melamine resin. It means that the color difference ΔE (ΔE ^* _ab ) between the surface after dropping one drop of oleic acid on the surface and then dry-wiping with a waste cloth 10 times and the surface before dropping is expressed fingerprint resistance. Therefore the colors in the L ^* a ^* b ^* color space of the surface before dropping the oleic acid was dropped oleic acid with colors in L ^* a ^* b ^* color space of the surface after dry wiping as described above The distance is ΔE (ΔE ^* _ab ). Such a color difference measurement can be obtained, for example, by Konica Minolta, Inc., a spectrocolorimeter CM-370, or the like.

  The form of the concave line 13 for having such fingerprint resistance is a line groove having a finite-length curved segment as can be seen from FIG. The top view which paid its attention to the example of the one concave wire 13 in FIG. 3 was represented. The linear groove portion 12 is formed as an aggregate in which countless concave linear stripes 13 are arranged.

And from a viewpoint of improving fingerprint resistance more, it is preferable that a concave line has the following forms.
The width W is the shortest distance among the straight lines connecting the edges of the concave line on the opposite side from the edge of the concave line, passing through the deepest point of the concave line, in plan view. The width W is preferably 1 μm or more and 100 μm or less, and more preferably 1 μm or more and 25 μm or less.
Depth F is Rz (JIS B 0601-2001, measuring equipment: two-dimensional, three-dimensional surface roughness measuring instrument, Ryoko Co., Ltd.) when measured with a surface roughness measuring instrument. The depth F is preferably 1 μm or more and 100 μm or less, more preferably 5 μm or more and 50 μm or less.
The radius of curvature R is an average of five concave lines measured by measuring ten curved parts per concave line. The curvature radius R is preferably 1 μm or more and 50 μm or less, and more preferably 1 μm or more and 25 μm or less.
The length L is preferably 1 μm or more and 500 μm or less, more preferably 1 μm or more and 250 μm or less.

  As described above, the concave line 13 has a finite length and a curved portion having a predetermined width W (with a width W> 0). However, for example, the concave line 13 as shown in FIGS. 4 and 5 may be included.

The concave line 13 shown in FIG. 4 is a so-called corrugated shape, and includes a single pole portion 13a (corresponding to a maximum point or a minimum point in the curve) having an inclination of 0, and a pole portion different from the pole portion 13a. It is an example extended with 13b. Such a corrugated concave line 13 may be included.
The preferable range of the length, width, depth, and radius of curvature of the corrugated concave line 13 is as described in the concave line 13 shown in FIG.

The concave line 13 shown in FIG. 5 has a branch, and is an example having a first branch 13d and a second branch 13e from one base 13c. A concave line 13 having such a branch may be included.
The preferable ranges of the width, the height, and the radius of curvature of the concave line 13 having a branch are as described in the concave line 13 shown in FIG. On the other hand, as for the length of the concave line 13 having a branch, the total length of the base 13c and the first branch 13d and the total length of the base 13c and the second branch 13e are shown in FIG. It is preferable that it is the range demonstrated with the concave-line strip 13.

Further, the shape of the concave line 13 in plan view is a closed curve 13f such as a circle, an ellipse, a polygon with rounded corners (curvature radius> 0) as shown in FIG. May be included. The closed curve 13f has a width W according to the above example.
FIG. 6A shows an example of a closed curve 13f that is rounded in the vicinity of the vertex and is formed of a polygon or the like, and FIG. 6B is an example of a closed curve 13f that is formed of an ellipse. Such closed curve, the interior (inside) more diameter larger closed curves 13f ₂ as shown in FIG. 6 (c), may also be included a small closed curve 13f ₁ of more diameters. Further, as shown in FIG. 6D, the closed curve 13f may be accompanied by an open curve 13g having a larger diameter adjacent to the outside thereof.
The shape of the concave line 13 in plan view may be a shape in which a part of a closed curve is notched as shown by 13 g in FIG. Or although illustration is abbreviate | omitted, the planar view shape of the concave line 13 has the shape which made the concave line strip of the shape as illustrated in FIG. 6 meander in planar view, or bent it into zig zag (zig zag) May be included.

The indented line 13 as described above is arranged innumerably on the surface of the base material 11 to form the line groove portion 12. The arrangement of the plurality of concave line strips 13 in the line groove section 12 may be any layout that can have fingerprint resistance as described above.
The specific form for that is not particularly limited, but as an example, the interval between the adjacent concave stripes 13 is preferably 1 μm or more and 70 μm or less, and more preferably 1 μm or more and 30 μm or less. .

FIG. 7A and FIG. 7B show examples of the mode of the adjacent concave line 13.
FIG. 7A shows an example in which two curved concave line strips 13 are arranged so that their bending directions are aligned. In such a case, it is preferable that the most separated distance indicated by G in FIG.
FIG. 7B shows an example in which two curved concave line strips 13 have different bending directions, and are arranged such that the tips enter into the space due to the bending. Even in such a case, it is preferable that the most distant distance as indicated by G in FIG.

Moreover, when it sees as a whole about the form and arrangement | positioning of the several concave line 13 of the line groove part 12, it can also consider as follows. That is, the form and arrangement of the plurality of concave line strips 13 included in the line groove portion 12 can be formed by a so-called Turing pattern.
A Turing pattern is a spatial pattern that occurs spontaneously in a reaction-diffusion equation system.

Here, u is the concentration of so-called active agent, v is the concentration of so-called inhibitors, D _u is the diffusion coefficient of the active agent u, D _v is the diffusion coefficient of the inhibitor v, f (u, v) and g ( u, v) is a function of the variables u, v.
This equation is originally an expression representing the amount of increase / decrease in the concentration u of the active factor involved in positive feedback of various chemical reactions and the concentration v of the inhibitory factor involved in negative feedback. The first term on the right side of the above formula is called a reaction term, and is a term that determines the amount of generation / degradation of the active factor and inhibitory factor by the ratio of the concentration (u, v) of the active factor and inhibitory factor. The second term is called a diffusion term, and is a term that determines the amount of the active factor or inhibitory factor that moves due to the diffusion phenomenon.

This reactive diffusion equation generates various patterns in the plane (u, v) according to the diffusion coefficients D _u , D _v , functions f (u, v), g (u, v), and boundary conditions. It is known that Such a pattern is called a Turing pattern.

The planar view shape of the plurality of concave line strips 13 constituting the line groove portion 12 on the surface of the decorative material is defined by a diffusion coefficient D _u , D _v , a function f (u, v), g (u, v), and a boundary condition. The width (W), the length (L), the curvature radius (R), and the distance of the concave line 13 in plan view are specified and the dimensions (pattern enlargement / reduction magnification) are defined so as to fall within the preferable range, In addition, by setting the depth F to a pattern defined in the above preferred range (hereinafter also referred to as “specific Turing pattern”), the linear groove portion 12 composed of the concave linear stripe 13 is formed on the surface. The decorative material provided can sufficiently exhibit the effects of the present invention.

  According to the cosmetic material 10 described above, fingerprint resistance can be improved regardless of the material used for the cosmetic material. For example, even when a melamine resin is used as a material, it has excellent fingerprint resistance.

  Moreover, according to the above-mentioned linear groove part 12, the surface of a makeup | decoration material can also be provided with the characteristic of matte. Thus, even a matte surface has fingerprint resistance.

  The use of the decorative material described above is not particularly limited, but for example, interior materials for buildings such as walls, floors, ceilings, exterior walls of buildings, roofs, gates, fences, fences, and other exterior casing materials, doors, windows Frames, doors, door frames and other fittings, surrounding materials, surface materials for construction materials such as skirting boards and handrails, surface materials for housings of home appliances such as TV sets and refrigerators, furniture such as desks, dining tables and baskets Surface materials, boxes, surface materials for containers such as resin bottles, interior materials or exterior materials for vehicles and the like, interior materials or exterior materials for ships, and the like.

Next, manufacturing method S10 which is an example of the manufacturing method of a cosmetic material is demonstrated. However, the method of manufacturing the decorative material is not limited to this.
The cosmetic material manufacturing method S10 of this example includes a pattern creating step S11, a plate making step S12, a shaped sheet creating step S13, and a shaping step S14. Hereinafter, each step will be described. In addition, in this example, the form and arrangement | positioning of the concave filament 13 of the filament groove part 12 are demonstrated by the example formed with a Turing pattern.

<Pattern creation step S11>
In the pattern creating step S11, a specific Turing pattern to be expressed in the linear groove portion 12 is formed by numerical simulation to create pattern data, which is stored as digital data in a storage device.

<Plate making process S12>
In the plate making step S12, a plate (for a shaped sheet) having the same unevenness on the surface as the unevenness (height of the height) formed on the linear groove portion 12 of the decorative material based on the Turing pattern obtained in the pattern creating step S11. Mold). And specifically, the manufacturing process of unevenness includes the following steps (1) to (5).

(1) Gray image data creation step Digital gray image data corresponding to the planar pattern of the concave line 13 constituting the line groove portion 12 is created. The grayscale image data is data in which the image density is associated with each coordinate of the metal roll surface described later. Here, the grayscale image data can be created with a resolution of 2540 dpi in 8-bit image grayscale (256 grayscales) in the TIFF format using the planar view pattern obtained in the pattern creation step S11.

(2) Metal Roll Preparation Step In parallel with the step (1), a metal roll 20 for plate engraving as shown in FIG. 8 is prepared. The metal roll 20 is formed by plating a copper layer on the surface of a hollow iron cylinder having rotational drive shafts (shafts) 21 at both axial ends. The surface of the metal roll 20 is polished and roughened with a grindstone, and a process for preventing a decrease in engraving efficiency due to mirror reflection of the engraving laser beam is performed.

(3) Laser beam engraving step As schematically shown in FIG. 8, the surface of the metal roll 20 prepared in step (2) is converted into grayscale image data created in step (1) using a laser beam direct engraving machine. Engraving based on. As a result, a concavo-convex shape having the same planar view shape as the concavo-convex surface of the decorative material as shown in FIG.
Therefore, the shape which the unevenness | corrugation in a plate should be equipped with is the same aspect as the uneven | corrugated relationship of the unevenness | corrugation in an above-described decorative material.

The metal roll 20 is driven by an electric motor through the rotation drive shaft 21 and rotated around the rotation drive shaft 21 as a central axis. Oscillation wavelength 1024nm emitted from the laser head 22, the laser spot diameter 10 [mu] m, to scan the entire surface of the metal roll 20 in the fiber laser light _{L A} output 600W. At that time, the laser beam is switched on and off (switching between irradiation and non-irradiation) according to the density value of the grayscale image data created in the step (1), and the irradiation position is a metal by one laser beam irradiation. A recess having a depth of 10 μm is formed by evaporating. The scanning with respect to the metal roll surface by such laser light is repeated 10 times. Further, in order to prevent the evaporated metal from becoming a 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 light irradiation is performed in the state.
At that time, for example, in the position coordinates of the image density corresponding to the plate depth of 50 μm on the data, the laser light is irradiated (ON) only for the first five times out of the total of 10 scans, and the remaining 5 times are used. Control is performed so that the laser beam is not irradiated (OFF).
The scanning of the laser beam is completed, and a desired uneven shape is formed on the surface of the metal roll 20.

(4) Electropolishing Step After the engraving liquid is washed, electrolytic polishing is performed to remove metal residues attached to the surface of the metal roll 20.

(5) Chrome plating step After step (4), a chromium layer having a thickness of 10 μm is formed on the surface of the metal roll by plating.

  As described above, a plate (shaped sheet forming mold) having the same uneven shape as the unevenness formed on the surface of the linear groove portion 12 on the surface can be obtained.

<Shaping sheet production process S13>
In the shaping sheet preparation step S13, the easy-bonding surface of the biaxially stretched PET film is coated using a plate prepared with a coating ink containing an ionizing radiation curable acrylate monomer, and the coating ink is irradiated with ultraviolet rays. The shaped sheet is prepared by curing by performing the above.
Thereby, the shaping sheet | seat which equips the surface with the uneven | corrugated shape opposite to the unevenness | corrugation formed in the surface of the linear groove part 12 can be obtained. Although the unevenness | corrugation formed here is an unevenness | corrugation opposite to the unevenness | corrugation by the concave line 13 of the linear groove part 12, the form and arrangement | positioning can be considered similarly to the above.

<Shaping process S14>
The shaping step S14 is performed as follows.
First, a titanium paper base paper is impregnated with a liquid uncured composition of a thermosetting resin containing a melamine formaldehyde resin so that the uncured composition becomes a predetermined ratio when dried using an impregnation apparatus, and then dried. By doing so, an impregnated decorative sheet is obtained.
Next, this impregnated decorative sheet is laminated on a phenolic resin impregnated core paper impregnated with a resin liquid made of phenol resin in kraft paper, and the shaped sheet prepared on the impregnated decorative sheet thus prepared is shaped. Lamination is performed such that the printing surface of the sheet is in contact with the printing surface of the impregnated decorative sheet.
The laminate thus formed is sandwiched between two metallic mirror plates, and heat-molded under conditions of a predetermined temperature and time while applying pressure using a hot press machine, and the uncured composition Heat cure. Thereby, the cured resin layer containing a melamine resin is formed.
Finally, the decorative sheet 10 is obtained by peeling the shaped sheet from the cured resin layer.

  A cosmetic material was produced according to the cosmetic material 10 and the manufacturing method S10, and it was set as an example. Moreover, the decorative material which does not have a linear groove part was produced, and it was set as the comparative example.

[Shape and Production of Example Cosmetic Material]
The cosmetics according to Example 1 and Example 2 are as shown in FIG. 1 in plan view. The concave line of the linear groove provided in the decorative material is shaped and arranged by a Turing pattern.
Such a decorative material was produced as follows.

A Turing pattern was created following the pattern creation step S11 to obtain specific Turing pattern data. This specific Turing pattern is a numerical simulation, "Simple reaction-diffusion cellular automaton model generating Turing pattern and its integrated circuit", Yohei Suzuki, Takahiro Takayama, Motoike N. This is a pattern obtained by simulation using an improved reaction-diffusion equation of the young model proposed on page 3 of Ikuko, IEICE, and IEICE Technical Report.
In the reaction-diffusion equation, the ratio D _{v /} D _u of the diffusion coefficient D _v of the diffusion coefficient of the active agent u D _u and inhibitor v 6, and the Turing pattern to generate an offset C of the sigmoid function as 0.

  Next, for the same pattern, the dimension data includes a width W of 10 μm to 20 μm, a length L of 5 μm to 100 μm, a radius of curvature R of 1 μm to 50 μm, and an interval between adjacent concave stripes of 20 μm or more. The magnification of the pattern was adjusted so that it was distributed in a range of 30 μm or less. Thus, the plane view pattern data which exhibits the specific Turing pattern of the line groove part 12 comprised from the concave line 13 was created.

  Next, a plate for a shaped sheet was prepared following the plate preparation step S12.

Next, a shaped sheet was produced following the shaped sheet production step S13. Specifically, it is as follows.
A 50 μm thick PET film (Cosmo Shine (registered trademark) A4100 (50 μm) manufactured by Toyobo Co., Ltd.) was prepared.
In addition, ionizing radiation curable monomer (Toagosei Co., Ltd., Aronix (registered trademark) M350) 100 parts by mass, reactive silicone (Shin-Etsu Chemical Co., Ltd., X-22-164B) 2 parts by mass, silica (Fuji Silysia Chemical) A coating ink containing 5 parts by mass of Silicia 450, manufactured by Co., Ltd. and 50 parts by mass of ethyl acetate was also prepared.
The prepared coating ink is applied to the easy-adhesive surface of the PET film using the prepared plate, irradiated with an electron beam of 5 Mrad at an acceleration voltage of 165 kV, and cured to obtain a shaped sheet. It was.

Next, a cosmetic material according to the example was obtained following the shaping step S14. Specifically, it is as follows.
First, a liquid uncured composition of a thermosetting resin comprising 60 parts by mass of melamine formaldehyde resin, 35 parts by mass of water, and 5 parts by mass of isopropyl alcohol was prepared.
The uncured composition was impregnated on the titanium paper base paper using an impregnation apparatus. At this time, the uncured composition was impregnated so as to have a ratio of 80 g / m ² (when dried) when dried. And this was dried and the impregnation decorative sheet was obtained.

Next, this impregnated decorative sheet was laminated on three sheets of phenol resin-impregnated core paper (Ota Sangyo Co., Ltd., Ota Core) having a basis weight of 245 g / m ² in which a kraft paper was impregnated with a resin liquid composed of a phenol resin.
Further, the shaped sheet produced on the impregnated decorative sheet was laminated so that the printed surface of the shaped sheet was in contact with the printed surface of the impregnated decorative sheet.
Thereafter, the formed laminate is sandwiched between two mirror plates, and heat molded using a hot press machine at a pressure of 100 kg / cm ² and a molding temperature of 150 ° C. for 10 minutes, and the uncured composition is heated. A cured resin layer containing a melamine resin was formed by curing.

  Finally, the decorative sheet according to the example was obtained by peeling the shaped sheet from the cured resin layer.

[Shape and Production of Comparative Cosmetic Material]
The decorative material of the comparative example produced the shaping sheet using what is called a blast mat | matte film which does not have a linear groove part. Then, with this shaped sheet, a decorative material was obtained in the same manner as the decorative material of the example. FIG. 9 shows an enlarged plan view of a part of the decorative material according to the comparative example. FIG. 9 is the same viewpoint and scale as FIG.

[Evaluation methods and results]
Measure the length L, width W, depth F, radius of curvature R, and spacing of the concave streak by the method described above, and quantitatively evaluate the gloss of the decorative material, the visual fingerprint resistance, and the fingerprint resistance by the color difference ΔE. Went. Table 1 shows the results.
Here, “length”, “width”, “radius of curvature”, and “interval” were measured using an optical microscope VHX-6000 manufactured by Keyence Corporation. The “depth” was measured using a two-dimensional and three-dimensional surface roughness measuring instrument manufactured by Ryoko Co., Ltd. In addition, “length”, “width”, “depth”, “curvature radius”, and “interval” are 5 shaped sheets of each level (Example 1, Example 2, Comparative Example), 10 points were measured from the shape sheet, and the total number of data was N = 50.
“Gloss” was measured with a gloss meter (60 °, measuring instrument BYK Gardner, Micro Gloss).
“Fingerprint resistance (visually)” means “◎” when the surface of the decorative material is touched with a finger and visually observed to have high fingerprint resistance, “◯” when it has fingerprint resistance, and fingerprint resistance. The case where the value was low was set as “x”.
“Fingerprint resistance (colorimetric ΔE value)” was obtained by measuring ΔE ^* _ab with Konica Minolta, Inc., a spectrocolorimeter CM-370 as described above.

  As can be seen from the results, the cosmetic materials according to Examples 1 and 2 are excellent in fingerprint resistance both visually and quantitatively.

DESCRIPTION OF SYMBOLS 10 Cosmetic material 11 Base material 12 Line groove part 13 Concave line

Claims (4)

A cosmetic material with irregularities formed on the surface,
A substrate, and a linear groove portion in which a plurality of concave filaments are arranged on the surface of the substrate;
The concave line has a finite length in plan view and has a curved portion,
A cosmetic material in which the plurality of concave filaments of the filament groove portion have a pattern in which fingerprint resistance represented by a color difference ΔE is 1.50 or less.   The decorative material according to claim 1, wherein the plurality of concave filaments of the filament groove part have a Turing pattern.   The said base material and the said linear groove part are cosmetics of Claim 1 or 2 which comprises a melamine resin. A method for producing the cosmetic material according to any one of claims 1 to 3,
Forming grayscale image data of the pattern of the concave stripes to be represented on the decorative material;
Producing a plate having the same concave line pattern as the concave line pattern based on the grayscale image data;
A step of preparing a shaped sheet by applying and curing ink on the side of the prepared plate provided with the concave filaments; and
Laminating the shaped sheet on a sheet impregnated with resin and thermoforming it while applying pressure.