JP7338199B2 - decorative material - Google Patents

Description

The present invention relates to a decorative material.

There are a wide variety of design expressions in decorative materials, but for example, as described in Patent Document 1 and Patent Document 2, by providing a large number of parallel line-shaped uneven patterns, the intensity of the light rays reflected on the surface, that is, the glossiness However, there is a technique for giving a unique appearance texture that changes according to the combination of the incident angle of the illumination light and the viewing direction of the observer.

For example, as described in Patent Literature 1 and Patent Literature 2, it is possible to express the luster of the surface (wood grain) of the wood by forming a multitude of parallel line-shaped uneven patterns.

Japanese Patent Publication No. 7-22989 JP-A-4-125199

In recent years, there has been a demand for further diversification of design expression, and in the design expression of more delicate concave-convex patterns, there is a demand for imparting a high tactile sensation to the decorative material as well as a visually excellent concave-convex feeling.

SUMMARY OF THE INVENTION An object of the present invention is to provide a decorative material having an uneven pattern formed on its surface and having a visually excellent texture and a high tactile sensation.

The present inventors have made earnest studies to solve the above problems. As a result, in the decorative material having an uneven pattern formed on the surface, the uneven pattern has a form in which a plurality of convex portions and a plurality of concave portions are alternately arranged, and the plurality of convex portions are arranged at two relatively high heights. After arranging a plurality of relatively low protrusions between the protrusions, the height difference between the relatively high protrusions and the relatively low protrusions is set to a predetermined value or more, and the two relatively high protrusions are arranged. It has been found that by setting the pitch of the projections to a value equal to or greater than a predetermined value, the textured pattern of the decorative material can provide a visually excellent unevenness and a high tactile sensation.

The present invention is an invention completed by further studies based on these findings.

That is, the present invention provides inventions in the following aspects.
Section 1. A decorative material having an uneven pattern formed on its surface,
The uneven pattern is a form in which a plurality of protrusions and a plurality of recesses are alternately arranged,
The plurality of protrusions are arranged with a plurality of relatively low protrusions between two relatively high protrusions,
The height difference between the relatively high convex portion and the relatively low convex portion is 5 μm or more,
The decorative material, wherein the pitch of the two relatively tall projections is 1000 μm or more.
Section 2. Item 2. The decorative material according to Item 1, wherein the pitch of the relatively low convex portions is 500 μm or less.
Item 3. Item 3. The decorative material according to item 1 or 2, wherein the width of the relatively high convex portion is 50 μm or more and 250 μm or less.
Section 4. 4. The decorative material according to any one of Items 1 to 3, wherein the width of the relatively low convex portion is 50 μm or more and 500 μm or less.
Item 5. Item 5. The decorative material according to any one of Items 1 to 4, wherein the height of the relatively high projections is 10 μm or more and 50 μm or less.
Item 6. 6. The decorative material according to any one of items 1 to 5, wherein the number of relatively low protrusions arranged between the two relatively high protrusions is 1 or more and 10 or less.
Item 7. A region in which a plurality of relatively low protrusions are arranged between the two relatively high protrusions constitutes a group of design A,
Item 7. The decorative material according to any one of Items 1 to 6, wherein a plurality of the designs A are provided to form a design B comprising the uneven pattern as a whole.
Item 8. Item 8. The decorative material according to any one of Items 1 to 7, wherein the uneven pattern is parallel lines.

ADVANTAGE OF THE INVENTION According to this invention, the uneven|corrugated pattern is formed in the surface, and it can provide the decorative material provided with the visually excellent unevenness|corrugation feeling and the high touch.

2 is a schematic diagram showing a part of the surface of the decorative material 10; FIG. FIG. 2 is a schematic diagram showing a part of the cross section of the decorative material 10; 3 is a schematic diagram showing a part of the surface of the decorative material 20. FIG. 3 is a schematic diagram showing a part of the surface of the decorative material 30. FIG. 4 is a graph showing the results of measuring the height information of the uneven pattern of the decorative material produced in Example 1 using a laser microscope. 4 is a graph showing the results of measuring the height information of the uneven pattern of the decorative material produced in Example 2 using a laser microscope. 4 is a graph showing the results of measuring the height information of the uneven pattern of the decorative material manufactured in Comparative Example 1 using a laser microscope.

The decorative material of the present invention is a decorative material having an uneven pattern formed on its surface. The concave-convex pattern of the decorative material of the present invention has a form in which a plurality of convex portions and a plurality of concave portions are alternately arranged, and the plurality of convex portions are arranged between two relatively high convex portions. A plurality of portions are arranged, a height difference between a relatively high protrusion and a relatively low protrusion is 5 μm or more, and a pitch between the two relatively high protrusions is 1000 μm or more. and The decorative material of the present invention having such a structure exhibits a visually excellent unevenness feeling and a high tactile sensation due to a combination of a plurality of convex portions and concave portions having different heights. BEST MODE FOR CARRYING OUT THE INVENTION The decorative material of the present invention will be described in detail below with reference to the drawings.

In this specification, the numerical range indicated by "-" means "more than" and "less than". For example, the notation of 2 to 15 mm means 2 mm or more and 15 mm or less.

FIG. 1 is a schematic diagram (plan view) of a part of the decorative material 10 according to the first embodiment, which is enlarged and viewed from the pattern forming layer 12 side. Directional arrows (x, y, z) are also shown as necessary in FIG. 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. FIG. 1 is a diagram of the decorative material 10 viewed from the pattern forming layer 12 side, particularly from the z direction.

Moreover, the cross-sectional shape of the decorative material 10 is shown in the schematic diagram of FIG. This cross section is taken along the line x1-x2 in FIG. 1, and is the thickness direction (z direction) perpendicular to the direction (y direction) in which the ridge lines of the protrusions _13A and _13B described later extend. Cross section.

As can be seen from FIGS. 1 and 2, the decorative material 10 comprises a base material 11 and a pattern forming layer 12 on one surface of the base material 11 .

The base material 11 is a sheet-like member having a function of imparting strength to the decorative material 10 .

As the base material 11, the same base materials for conventionally known cosmetic materials can be applied, and the material is not particularly limited. For example, the material of the substrate is generally polyolefin resin such as polyethylene, polypropylene, olefin thermoplastic elastomer, ionomer, etc., acrylic resin such as polymethyl methacrylate, polybutyl methacrylate, etc., thermoplastic resin such as polyethylene terephthalate, polybutylene terephthalate, etc. Thermoplastic resins such as polyester resins, thermoplastic urethane resins, vinyl chloride resins, ABS resins (acrylonitrile-butadiene-styrene copolymer), styrene resins, melamine resins, unsaturated polyester resins, two-component curable urethane resins, etc. A curable resin, or an ionizing radiation curable resin such as a radical polymerization type acrylate type or a cationic polymerization type epoxy type which is cured by ionizing radiation (ultraviolet rays, electron beams, etc.) is used. In addition, when the material of the base material is a resin, it may be colored with a known coloring agent. In addition, paper, non-woven fabric, metal, wood, ceramics such as porcelain and glass, cement, stone, etc. can also be used in the form of sheets, plates, three-dimensional objects, etc., and can be appropriately laminated with the above resin material.

The thickness of the base material 11 is not particularly limited. , the thinnest portion can be about 1 mm or more and 20 mm or less.

The pattern-forming layer 12 is a layer located on one side of the base material 11 and is a layer that forms an uneven pattern of the decorative material 10 . The pattern forming layer 12 preferably constitutes a part of the substrate 11 , but may be laminated on the substrate 11 . The mode in which the pattern forming layer 12 constitutes a part of the base material 11 can be formed by subjecting the base material 11 to embossing as described later. In this embodiment, the pattern forming layer 12 has the following configuration.

As shown in FIGS. 1 and 2, in this embodiment, the pattern forming layer 12 is formed by alternately arranging a plurality of convex portions _13A and _13B and a plurality of concave portions 14. As shown in FIG. As shown in FIG. 1, in this embodiment, the plurality of protrusions _13A and _13B have a shape extending linearly when the decorative material is viewed from above. forming In the decorative material of the present invention, the shape of the projections _13A and _13B is not limited to a linear shape. , or other shapes.

As shown in FIG. 2, in this embodiment, the plurality of protrusions are relatively high between two relatively high protrusions _13A (sometimes simply referred to as "protrusions _13A "). It has a shape in which a plurality of low convex portions 13 _B (sometimes simply referred to as “convex portions 13 _B ”) are arranged. That is, the plurality of protrusions forming the uneven pattern of the decorative material includes two protrusions _13A provided via the plurality of protrusions _13B . In FIG. 2, six protrusions _13B are arranged between two protrusions _13A . In addition, as shown in the schematic diagram of FIG. 1, the uneven pattern may have a portion where a plurality of protrusions _13A are adjacent to each other.

As shown in the schematic diagram of FIG. 1, in the decorative material 10 of the present embodiment, a plurality of relatively low convex portions _13B are arranged between two relatively high convex portions _13A (Fig. 1 ) constitutes a single design A, and by providing a plurality of designs A, a design B consisting of an uneven pattern is formed as a whole. The uneven pattern shown in FIG. 1 is parallel lines. More specifically, a design A formed by a plurality of linearly extending ridges extending in one direction (x-direction) and a plurality of linearly extending linearly extending in the other direction (y-direction) orthogonal to the one direction. An uneven pattern (design B) is formed by regularly arranging a plurality of designs A formed by protruding filaments. The length by which the protruding filaments extend is not particularly limited, and can be appropriately determined according to need. Further, the direction in which the ridges extend is not limited to that shown in FIG. 1, and can be appropriately determined according to the intended design. The line-shaped uneven pattern shown in FIG. 1 is composed of a combination of a large number of parallel straight lines, but the line-shaped uneven pattern is composed of, for example, a combination of a large number of parallel curved lines. It can be anything that exists.

The size of the area that forms the collective design A is not particularly limited, and can be appropriately set according to the overall design to be given to the decorative material. As a specific example of the size of the area forming a group of designs A, for example, the area is about 1 to 100 mm ² .

In this embodiment, the height difference between the convex portions 13 _A and 13 _B (height H _A of the convex portion 13 _A −height H _B of the convex portion 13 _B ) is 5 μm or more. From the viewpoint of more suitably enhancing the visual unevenness of the decorative material and the tactile sensation based on the unevenness, the height difference between the convex portions _13A and _13B is preferably about 5 to 30 μm, more preferably about 10 to 30 μm. , more preferably about 15 to 30 μm. In addition, when the height of two relatively high convex parts _13A differs, let the height of the higher one be the height of the convex part _13A . Similarly, when there are a plurality of relatively low protrusions 13 _B between two protrusions 13 _A and the plurality of protrusions 13 _B are different, the height of the highest protrusion is 13 _B height. The height difference between the projections _13A and _13B is also calculated from the height values of the projections _13A and _13B identified in this way. Similarly, for the widths W _A and W _B of the protrusions _13A and 13B, the largest width _is adopted.

Moreover, in this embodiment, the pitch P _A between the two relatively tall projections 13 _A is 1000 μm or more. From the viewpoint of more suitably enhancing the visual unevenness of the decorative material 10 and the tactile sensation based on the unevenness, the pitch P _A of the two convex portions 13 _A is preferably about 1000 to 10000 μm, more preferably about 1000 to 5000 μm. It is preferably about 1200 to 2500 μm. As shown in FIG. 2, the pitch P _A between the two protrusions _13A is the length of a straight line connecting the centers of the protrusions _13A in the width direction.

The pitch P _B of the plurality of relatively low protrusions 13 _B positioned between the two relatively high protrusions 13 _A is such that the pitch P _A of the two protrusions 13 _A is 1000 μm or more, In addition, the thickness is not particularly limited as long as the convex portion _13B is arranged between the two convex portions _13A . Below, it is more preferably about 100 to 400 μm, still more preferably about 150 to 400 μm. As shown in FIG. 2, the pitch _PB of the protrusions _13B is the length of a straight line connecting the centers of the adjacent protrusions _13B in the width direction. When three or more protrusions _13B are arranged, it is preferable that the protrusions _13B are arranged at approximately equal intervals.

The pitch P _AB between the convex portion _13A and the adjacent convex portion _13B is not particularly limited. It is preferably 500 μm or less, more preferably about 100 to 400 μm, still more preferably about 150 to 400 μm. The pitch P _AB between the convex portion _13A and the adjacent convex portion _13B is, as _shown in FIG _. is the length of the straight line connecting Pitch P _B and pitch P _AB are preferably substantially the same. That is, it is preferable that the plurality of convex portions 13 _B and the two convex portions 13 _A sandwiching them are arranged at approximately equal intervals.

The width W _A of the relatively high protrusions 13 _A is not particularly limited, but is preferably about 50 to 250 μm, more preferably about 50 to 250 μm, from the viewpoint of more preferably enhancing the visual unevenness of the decorative material and the tactile sensation based on the unevenness. About 50 to 200 μm, more preferably about 50 to 150 μm. The width W _A of the convex portion 13A is the width at the central portion in the height direction ₍ z direction) of the convex portion _13A .

In addition, the width W _B of the relatively low convex portion 13 _B is not particularly limited, but from the viewpoint of more suitably enhancing the visual unevenness of the decorative material and the tactile sensation based on the unevenness, it is preferably about 30 to 250 μm, and more It is preferably about 30 to 200 μm, more preferably about 30 to 150 μm. The width W _B of the convex portion 13 _B is the width at the central portion of the convex portion 13 _B in the height direction (z direction).

The relatively high height H _A of the convex portion 13 _A is not particularly limited as long as the height difference between the convex portion 13 _A and the convex portion 13 _B is 5 μm or more. From the viewpoint of more suitably enhancing the tactile sensation, the thickness is preferably about 8 to 50 μm, more preferably about 10 to 50 μm, even more preferably about 20 to 50 μm, particularly preferably about 30 to 50 μm. Moreover, the heights H _A of the two protrusions 13 _A sandwiching the plurality of protrusions 13 _B are preferably substantially the same, and specifically, the height difference is preferably 5 μm or less.

The relatively low height H _B of the convex portion 13 _B is not particularly limited as long as the height difference between the convex portion 13 _A and the convex portion 13 _B is 5 μm or more. From the viewpoint of more suitably enhancing the tactile sensation, it is preferably about 2 to 35 μm, more preferably about 3 to 35 μm, even more preferably about 5 to 30 μm, even more preferably about 10 to 30 μm, particularly preferably about 15 to 30 μm. be done. Moreover, it is preferable that the heights H _B of the plurality of protrusions 13 _B sandwiched between the two protrusions 13 _A are substantially the same _. It is preferable that the height difference of _B is 5 μm or less.

H _A /W _A (also referred to as an aspect ratio), which is the ratio of the height H _A to the width W _A of the relatively high convex portion 13 _A , is preferably about 0.05 to 1.0, more preferably It is about 0.08 to 0.7, more preferably about 0.1 to 0.7, more preferably about 0.2 to 0.7, particularly preferably about 0.3 to 0.7. If the aspect ratio is too large, the difficulty of manufacturing the mold (such as an embossing plate, which will be described later) will increase, and stress will concentrate on the convex portion _13A when an external force is applied to the mold and the decorative material, causing damage. becomes easier. Therefore, the aspect ratio is usually 1.0 or less, preferably 0.7 or less.

H _B /W _B (also referred to as an aspect ratio), which is the ratio of the height H _B to the width W _B of the relatively low convex portion 13 _B , is preferably about 0.03 to 1.0, more preferably It is about 0.04 to 0.5, more preferably about 0.1 to 0.5, particularly preferably about 0.2 to 0.5.

The number of relatively low projections _13B arranged between two relatively high projections _13A is not particularly limited, but it is possible to make the visual unevenness of the cosmetic material and the tactile sensation based on the unevenness more noticeable. It is preferably about 1 to 10, more preferably about 3 to 7, still more preferably about 5 to 7, from the viewpoint of suitably increasing it.

The cross-sectional shape of the projections _13A and _13B of this embodiment is substantially rectangular, but the cross-sectional shape is not limited to this and may be another form. For example, a trapezoid, a shape with a semi-circular tip, and a shape with an R formed at the outside corner can be mentioned, and it is possible to change them as appropriate. At this time, as for the width of the convex portion, the width at the center in the height direction is defined as the width of the convex linear portion as described above. The same applies to the second mode and the like, which will be described later.

As a material for forming the pattern forming layer 12, a normal material used for decorative materials can be appropriately used. The pattern forming layer 12 is made of the same material as the base material 11 if the base material is heated and softened to press the mold (embossing plate). In addition, if the pattern forming layer 12 is laminated on the base material 11 as a separate layer from the base material 11, from the viewpoint of curing the melted composition after molding, the same as the base material 11 prepared separately from the base material 11. of resin can be used.

The convex portions 13 _A and 13 _B shown in the present embodiment are in a form in which the ridgeline extends linearly (protrusive line portion), but the present invention is not limited to this, and may can be set. Specifically, in a plan view of the decorative material, the convex portion has a curved or wavy shape such as a parabola, a hyperbola, a sine wave curve, a hyperbolic sine function curve, an elliptic function curve, and a cycloid curve in the direction in which the ridge extends. It can also be made to have other forms such as a shape, or it can be a combination of a plurality of forms.

FIG. 3 shows a diagram showing the second embodiment. In the second embodiment, the projections 23 _A and 23 _B have a dotted shape in plan view of the decorative material 20 . Except that the projections 23 _A and 23 _B are dot-shaped, the pitch, width, height, arrangement, manufacturing method, etc. of the projections 23 _A and 23 _B of the decorative material 20 are the same as those described in the first embodiment. The shape can be the same, and the cross section can also be expressed as shown in FIG. In the second embodiment, the area surrounded by the dashed line in FIG. 3 constitutes a group of designs A', and as a whole forms a design B' consisting of an uneven pattern.

FIG. 4 shows a diagram showing the third embodiment. In the third embodiment, the uneven pattern formed by the projections _33A and _33B is parallel lines. More specifically, a hairline design is formed by a plurality of protruding filaments linearly extending in one direction (y direction). The pitch, width, height, arrangement, manufacturing method, etc. of the projections 33 _A and 33 _B of the decorative material 30 can be the same as those of the first embodiment. The line-shaped uneven pattern shown in FIG. 4 is also composed of a combination of a large number of parallel straight lines as in FIG. It may be configured by a combination of

The decorative materials shown in the first to third embodiments are preferably formed by, for example, embossing the base material 11 made of a thermoplastic resin sheet by heating and softening it and pressing it against an embossing plate. can be done. As a result, for example, in the first embodiment, the surface of the base material 11 is patterned by the pattern forming layer 12 including the projections 13 _A and 13 _B and the recesses 14 having desired uneven shapes. In these forms, no additional pattern layer is provided, but even if the base material 11 is transparent, by laminating it on another material, the pattern of the other material can be used for surface decoration. can be done. Further, the substrate 11 may be appropriately colored with a coloring agent such as brown or gray. In this case, the substrate itself becomes the pattern layer.

A pattern layer, a primer layer, a surface protective layer, and the like may be laminated on the pattern forming layer 12 side of the substrate 11 . Moreover, the base material 11 may be configured by a laminate in which at least one layer such as a pattern layer, a primer layer, and a surface protective layer is laminated on a base material layer. The base material 11 is preferably composed of a laminate in which at least a base material layer, a pattern layer, a primer layer, and a surface protective layer are laminated in this order.

For example, when the substrate 11 is composed of a laminate in which at least a substrate layer, a pattern layer, a primer layer, and a surface protective layer are laminated in this order, the pattern layer and the primer layer are formed on the substrate layer. , a surface coating layer, etc. are laminated and embossed to obtain a decorative material in which the pattern forming layer 12 is formed on the substrate 11 .

The material and thickness of the base material layer can be the same as those described for the base material 11 .

The pattern layer is formed, for example, by printing various patterns using ink and a printing machine. The pattern formed by the pattern layer is not particularly limited. Patterns such as imitation fabric patterns, tiling patterns, and brickwork patterns can be mentioned, and patterns such as marquetry and patchwork that combine these can also be mentioned. These patterns are formed by multi-color printing using the usual process colors of yellow, red, blue, and black. It is formed.

As the pattern ink used for the pattern layer, one obtained by appropriately mixing a binder with a coloring agent such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, or the like is used. The binder is not particularly limited, and examples thereof include polyurethane resins, vinyl chloride-vinyl acetate copolymer resins, mixed resins of vinyl chloride-vinyl acetate copolymers and acrylic copolymers, and chlorinated polypropylene. resins, acrylic resins, polyester resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins, and the like. These resins may be used singly or in combination of two or more.

The coloring agent is not particularly limited, and examples thereof include inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine blue, and cobalt blue, and quinacridone red. , isoindolinone yellow, phthalocyanine blue, and other organic pigments or dyes; metallic pigments, such as aluminum and brass, made of scale-like foil; titanium dioxide-coated mica; ) pigments and the like.

Although the thickness of the pattern layer is not particularly limited, it is, for example, about 1 to 30 μm, preferably about 1 to 20 μm.

The surface protective layer is a layer provided to improve the scratch resistance and weather resistance of the decorative material. The surface protective layer can be formed using a thermoplastic resin, a thermosetting resin, an ionizing radiation-curable resin, or the like. Among these, the surface protective layer is preferably formed of a cured product of an ionizing radiation-curable resin composition. The ionizing radiation-curable resin used for forming the surface protective layer is a resin that crosslinks and cures when exposed to ionizing radiation. A suitable mixture of at least one of prepolymers, oligomers, monomers, and the like. Here, the ionizing radiation means, among electromagnetic waves or charged particle beams, those having energy quanta capable of polymerizing or cross-linking molecules, and usually ultraviolet rays (UV) or electron beams (EB) are used. ray, electromagnetic waves such as γ-rays, charged particle beams such as α-rays and ion beams. Among ionizing radiation curable resins, electron beam curable resins can be solvent-free, do not require a photopolymerization initiator, and provide stable curing properties, making them suitable for forming a surface protective layer. used.

Although the thickness of the surface protective layer is not particularly limited, it is, for example, 5 to 20 μm, preferably 5 to 10 μm, from the viewpoint of improving the scratch resistance and weather resistance of the decorative material.

The primer layer is a layer provided so as to come into contact with the surface protective layer, if necessary, for the purpose of improving the adhesion between the surface protective layer and the underlying layer.

Examples of the primer composition constituting the primer layer include urethane resin, (meth)acrylic resin, (meth)acrylic-urethane copolymer resin, vinyl chloride-vinyl acetate copolymer, polyester resin, butyral resin, chlorinated polypropylene, A resin containing chlorinated polyethylene or the like as a binder resin is preferably used, and these resins can be used singly or in combination of two or more. Among these, urethane resins, (meth)acrylic resins, and (meth)acrylic-urethane copolymer resins are preferred.

Although the thickness of the primer layer is not particularly limited, it is, for example, about 0.5 to 20 μm, preferably 1 to 5 μm.

Further, for example, a configuration in which a pattern layer is formed on the back side of the base material 11 can be employed. In order to produce a decorative material having such a structure, for example, a transparent resin sheet is used as the substrate 11 so that the pattern layer can be seen through, and the pattern layer is printed on the back side of the substrate 11. After that, embossing may be performed by heating and softening and pressing the embossed plate on the front side.

Further, another base material can be laminated on the side of the pattern layer opposite to the side on which the pattern forming layer 12 is arranged. In order to produce a decorative material having such a structure, a pattern layer is printed on the front side of a base material made of a colored opaque thermoplastic resin sheet as a base sheet. A substrate made of a transparent thermoplastic resin sheet to be made into a sheet may be laminated by heat fusion using the doubling embossing method, and at the same time, a desired pattern may be embossed on the surface of the substrate.

Applications of the decorative materials described above are not particularly limited, but examples include interior materials for buildings such as walls, floors, and ceilings; exterior materials for exterior walls, roofs, gates, fences, and fences; Fittings such as frames, doors, and door frames; surface materials for fixtures such as rims, baseboards and handrails; surface materials for housings of home electric appliances such as TV receivers and refrigerators; surface materials for furniture such as chests of drawers; , surface materials for containers such as resin bottles, interior or exterior materials for vehicles, interior or exterior materials for ships, and the like.

The method for producing the decorative material of the present invention is not particularly limited as long as the predetermined uneven pattern is formed. The pattern forming layer forming the uneven pattern can be suitably formed using a mold such as an embossing plate. That is, a decorative material can be obtained by embossing a base material using a plate (embossing plate) prepared to form a predetermined uneven pattern.

Embossing may be performed by any suitable known method, and is not particularly limited. A representative method of embossing is, for example, as follows. A resin sheet made of a thermoplastic resin as described above is used as the base material. This base material is heated and softened, and an embossing plate is pressed against the surface of the base material to form the uneven pattern on the surface of the embossing 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 on which the uneven pattern is formed is released from the embossing plate. Here, various embossing methods will be further explained, 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 by heat-sealing a resin sheet (base material) that serves as a surface sheet and a resin sheet (second base material) that serves as a base sheet by heat and pressure when the embossing plate is pressed. and are simultaneously embossed by a doubling embossing method.

(C) A resin sheet (base material) to be used as a surface 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 forming the surface sheet. At this time, a resin sheet (second base material) inserted into the back side of the top sheet and used as a base sheet is heat-sealed to perform doubling embossing at the same time as film formation.

(D) As disclosed in JP-A-57-87318, JP-A-7-32476, etc., the surface of a cylindrical embossing plate is coated with an uncured liquid of an ionizing radiation curable resin. Further, a base sheet made of a resin sheet or the like is superimposed thereon, and ionizing radiation is irradiated to cure the uncured liquid material to obtain a cured material. At that time, after the cured product is adhered to the base sheet, the mold is released from the embossing plate to form a substrate comprising the base sheet and the cured product on the base sheet, thereby embossing the substrate.

(E) Impregnated paper obtained by impregnating paper such as titanium paper with uncured material of 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 A thermosetting resin decorative material is produced by laminating and integrating each layer by hot-press molding the layers. At that time, by inserting an embossing plate on the surface side of the impregnated paper, the thermosetting resin is impregnated and hardened to form a decorative material, and the surface is embossed simultaneously with the hot press.

Thermoplastic resins are typically used as the material for the base material used in the embossing methods (A) to (C), and the material for the base material used in the embossing method (D) is typically Typically, an ionizing radiation curable resin is used, and a thermosetting resin is typically used as the substrate material used in the embossing method (E).

EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples. However, the invention is not limited to the examples.

<Examples 1 and 2 and Comparative Example 1>
An embossing plate (having a shape opposite to the uneven pattern of the decorative material) for forming uneven patterns as shown in the schematic diagrams of FIGS. 1 and 2 was prepared, and each decorative material was manufactured by the method described later. The embossed plate was produced by plating the surface of a metal roll (made of iron) with copper, etching it and then plating it with chromium to form an uneven pattern that is the reverse of the uneven pattern formed on the decorative material. For Examples 1 and 2 and Comparative Example 1, the surface pattern of each embossing plate was designed with the goal that the uneven shape formed on the decorative material would be as follows.

In Example 1 _, for a group of designs _A shown in the schematic diagram of _{FIG .} is about 20 μm, the width W _A of the convex portion 13 _A is about 75 μm, the width W _B of the convex portion 13 _B is about 50 μm, the pitch P _A of the convex portion 13 _A is about 1400 μm, and the pitch P _B of the convex portion 13 _B is about 200 μm, and the pitch P _AB between the projections 13 _A and 13 _B is approximately 200 μm. Further, in the group of designs A, the convex portions _13A and the convex portions _13B constitute mutually parallel convex filamentary portions, each having a length of about 3000 μm. Six protrusions 13B are arranged between the two protrusions _13A . The area of each design A was about 4.2 mm ² , and the distance between each design A was about 200 μm.

In Example 2, for a group of designs _{A shown} in the schematic diagram of _{FIG .} is about 4 μm, the width W _A of the convex portion 13 _A is about 100 μm, the width W _B of the convex portion 13 _B is about 90 μm, the pitch P _A of the convex portion 13 _A is about 1400 μm, and the pitch P _B of the convex portion 13 _B is about 200 μm, and the pitch P _AB between the projections 13 _A and 13 _B is approximately 200 μm. Further, in the group of designs A, the convex portions _13A and the convex portions _13B constitute mutually parallel convex filamentary portions, each having a length of about 3000 μm. Six protrusions 13B are arranged between the two protrusions _13A . The area of each design A was about 4.2 mm ² , and the distance between each design A was about 200 μm.

_In Comparative Example _{1 ,} for a group of designs A _shown in the schematic diagram of _FIG . The widths W _A and _{W B} of 13B are the same about 25 μm, the pitches P A and P _B of the projections 13 _A and 13 _B are the same about 200 μm, and the pitch P between the projections 13 _A and 13 _B is set _{. AB} was about 200 μm. Further, in the group of designs A, the convex portions _13A and the convex portions _13B constitute mutually parallel convex filamentary portions, each having a length of about 3000 μm. Six protrusions _13B are arranged between two protrusions _13A . The area of each design A was about 4.2 mm ² , and the distance between each design A was about 200 μm.

Next, as a base layer, a pattern layer (1 μm thick) made of ink containing a coloring agent and a vinyl chloride-vinyl acetate copolymer is provided on one side of an ABS sheet (500 μm thick, 300 mm long, 300 mm wide). ), acrylic polyol, and a primer layer (1 μm thick) made of a urethane resin reacted with hexamethylene diisocyanate were laminated in this order. Next, the substrate layer is heated and softened at 180° C., and each embossing plate is pressed against the surface on which the pattern layer and the primer layer are laminated, and the entire surface of one side of the substrate layer is coated with the embossing plate surface. A concavo-convex pattern was formed. Next, the substrate layer was cooled and solidified to fix the uneven pattern on the substrate layer. Next, the substrate layer on which the uneven pattern is formed is released from the embossing plate, and the entire surface of the side on which the uneven pattern is formed is coated with a resin composition containing a polycarbonate-based bifunctional urethane acrylate. A surface protective layer (having a thickness of 5 μm at the protrusions _13A ) was formed by curing the resin composition by irradiating rays, and each decorative material having an uneven pattern on the surface was obtained. FIG. 5 (Example 1 ), FIG. 6 (Example 2), and FIG. 7 (Comparative Example 1). Further, the height H _A of the convex portion 13 _A read from the graph is [1], the height H _B of the convex portion 13 _B is [2], the width W _A of the convex portion 13 _A is [3], and the convex portion 13 The width W _B of _B is [4], the pitch P _A of the convex portion 13 _A is [5], the pitch P _B of the convex portion 13 _B is [6], and the pitch P _AB of the convex portion 13 _A and the convex portion 13 _B is [7], and the height difference H _A -H _B between the projections 13 _A and 13 _B is shown in each figure as [8].

<Evaluation of visual unevenness>
For each of the decorative materials obtained in Examples 1 and 2 and Comparative Example 1, the uneven pattern on the surface was observed with the naked eye, and the visual unevenness was evaluated according to the following criteria. Table 1 shows the results.
A: When the pattern is viewed from directly above, the pattern is clearly visible B: When viewed from directly above, it looks slightly thinner than A, but when viewed from an angle, the pattern is clearly visible C: Directly above, and When viewed from an angle, the pattern is thin and cannot be seen clearly.

<Evaluation of unevenness by tactile sensation>
For each of the decorative materials obtained in Examples 1 and 2 and Comparative Example 1, the rugged pattern on the surface was touched with a finger, and the tactile ruggedness was evaluated according to the following criteria. Table 1 shows the results.
A: Unevenness is clearly felt when stroked once. B: Unevenness is felt when stroked several times. C: Unevenness is hardly felt even when stroked many times.

Reference Signs List 10, 20, 30 Decorative material 11 Base materials 12, 22, 32 Pattern forming layers _13A , _23A , _33A Relatively high convex portions _13B , _23B , _33B Relatively low convexes Parts 14, 24, 34... Recesses

Claims (8)

A decorative material having an uneven pattern formed on its surface,
The decorative material includes at least a base material,
In the decorative material, the pattern forming layer located on one side of the base material forms the uneven pattern,
The pattern forming layer constitutes a part of the base material,
The uneven pattern is a form in which a plurality of protrusions and a plurality of recesses are alternately arranged,
The plurality of protrusions are arranged with a plurality of relatively low protrusions between two relatively high protrusions,
The height difference between the relatively high convex portion and the relatively low convex portion is 5 μm or more,
The pitch of the two relatively high protrusions is 1000 μm or more,
The decorative material , wherein the relatively high protrusions have a height of 10 μm or more and 50 μm or less . 2. The decorative material according to claim 1, wherein the pitch of said relatively low projections is 500 [mu]m or less. The decorative material according to claim 1 or 2, wherein the width of the relatively high convex portion is 50 µm or more and 250 µm or less. The decorative material according to any one of claims 1 to 3, wherein the width of the relatively low convex portion is 50 µm or more and 500 µm or less. The decorative material according to any one of claims 1 to 4, wherein the height of the relatively high projections is 20 µm or more and 50 µm or less. The decorative material according to any one of claims 1 to 5, wherein the number of relatively low protrusions arranged between the two relatively high protrusions is 1 or more and 10 or less. . A region in which a plurality of relatively low protrusions are arranged between the two relatively high protrusions constitutes a group of design A,
The decorative material according to any one of claims 1 to 6, wherein a plurality of said designs A are provided to form a design B comprising said uneven pattern as a whole. The decorative material according to any one of claims 1 to 7, wherein the uneven pattern is parallel lines.