JPH0939192A - Makeup sheet - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a decorative stone-grain-, wood-grain- or cloth-tone decorative sheet that reproduces a three-dimensional natural stone, wood- or cloth-like shine and is excellent in design. The purpose is to provide. SOLUTION: A glitter layer and a pattern layer are printed in this order on one surface of a thermoplastic resin film, and an embossing plate is used on the printing surface of this printing film to form parallel lines or parallel lines. After embossing the uneven pattern of the groove group
By bonding a transparent or translucent thermoplastic resin film to the embossed surface by heat fusion with a hot press, the boundary surface between the thermoplastic resin film and the embossed pattern layer and the transparent or translucent thermoplastic resin film and the embossed surface On the boundary surface of the pattern layer, an embossed pattern of parallel-lined groove groups consisting of parallel curve groups or parallel straight line groups is formed, and the cross section of the embossed shape formed on the boundary surface,
A decorative sheet having a rectangular wave with rounded corners and a smooth periodic function curve or pseudo-periodic function curve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a three-dimensional effect such as natural stone, wood or cloth, and has a pattern-like gloss or luster that changes in luster in a pattern depending on the light source or the direction of the observer's line of sight. The present invention relates to a decorative sheet with improved shine by embossing in order to reproduce the texture or texture.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Laid-Open No. 57-157756, an upper base sheet having a transparent synthetic resin film having a desired pattern on its back surface and a pearl solid layer on the pattern, The transparent synthetic resin film is heated to a temperature at which it softens, and immediately after heating, the upper base sheet is overlaid on the uneven surface of the lower base sheet made of a colored synthetic resin film having irregularities on its pearl solid layer side. There is a method for producing an embossed decorative sheet, which comprises simultaneously laminating and embossing the non-laminated surface of the upper base sheet for the purpose of adjusting gloss.

[0003]

However, a desired pattern is formed on the back surface of a transparent synthetic resin film as disclosed in JP-A-57-157756, and a pearl solid layer is formed on the pattern. The upper base sheet is heated to a temperature at which the transparent synthetic resin film softens, and immediately after heating, the upper base sheet is formed on the uneven surface of the lower base sheet made of a colored synthetic resin film having irregularities on the surface of the pearl solid layer. In the method for manufacturing an embossed decorative sheet, which is characterized in that the non-laminated surface of the upper base sheet is subjected to embossing for the purpose of adjusting gloss at the same time as stacking with the sides facing each other, endless winding such as doubling is used. Therefore, when the synthetic resin film is heated, an element called tension is added, and the uneven shape disappears, resulting in a three-dimensional shape. There is a disadvantage that can not be obtained the can.
In addition, a particular problem is that the embossed plate manufactured by a normal manufacturing process such as engraving and corrosion has a cross-sectional shape of a groove group that has square waves such as rectangular waves. The uneven shape of the uneven pattern for obtaining the cross-sectional shape of the glittering solid layer that reflects light has a rectangular wave and is angled,
Unlike natural wood, stone, and cloth, the luster was not sufficiently effective.

The present invention solves these problems and is excellent in design, which is not seen in the conventional decorative sheet, and reproduces the shining like natural stone, wood, or cloth, and is beautiful with a realistic feeling. The purpose is to provide a decorative sheet.

[0005]

In order to achieve the above object, the following inventions have been made. (Claim 1) A glittering layer and a pattern layer are printed in this order on one surface of a thermoplastic resin film, and an embossing plate is used on the printing surface of this printing film to form parallel curve groups or parallel straight line groups. After embossing the concavo-convex pattern of the linear groove group,
By bonding a transparent or translucent thermoplastic resin film to the embossed surface by heat fusion with a hot press, the boundary surface between the thermoplastic resin film and the embossed pattern layer and the transparent or translucent thermoplastic resin film and the embossed surface On the boundary surface of the pattern layer, an embossed pattern of parallel-lined groove groups consisting of parallel curve groups or parallel straight line groups is formed, and the cross section of the embossed shape formed on the boundary surface,
A decorative sheet having a rectangular wave with rounded corners and a smooth periodic function curve or pseudo-periodic function curve. (Claim 2) An embossing plate is used on one side of a transparent or translucent thermoplastic resin film to emboss a concavo-convex pattern of parallel-curve groups or parallel-line groove groups consisting of parallel straight-line groups, and then another heat On one side of the plastic resin film, a glitter layer,
By printing in the order of the pattern layer, the printed surface of this printed film is heat-fused to the embossed surface by heat-bonding to bond the thermoplastic resin film to the boundary surface of the embossed pattern layer and transparent or translucent. An embossed pattern of parallel linear grooves or parallel linear grooves formed on the boundary surface between the thermoplastic resin film and the embossed pattern layer, which crosses the embossed shape formed on the boundary surface. A decorative sheet, characterized in that the surface has a shape in which the corners of a rectangular wave are rounded and has a smooth periodic function curve or a pseudo periodic function curve. (Claim 3) The glitter layer is formed of an ink layer containing a glitter pigment, and the number area density of the glitter pigment is adjacent to a portion of the embossed pattern which is embedded in a more transparent thermoplastic resin film. The region having a relatively low density is distributed, and the region adjacent to the portion projecting toward the thermoplastic resin film side is distributed so as to have a higher density. 4. Makeup sheet. It is.

As shown in FIGS. 1 (a) and 1 (b), the embossing process and the laminating process are separately provided as a function and effect of the method for manufacturing a decorative sheet according to the present invention. When the film on which the film is formed and the transparent thermoplastic resin film are heat-sealed and bonded to each other, no harmful tension is applied. That is, since it is not the endless winding like the conventional doubling, no tension is applied when the film is heated, so that the uneven shape does not disappear and a three-dimensional appearance is obtained. In addition, the embossed shape of the film, which initially had a rectangular wave-shaped cross section, is softened and changes into a shape with rounded corners of the rectangular wave through a heating and pressing process using a heating plate. And
The embossing of the embossed film is a parallel curve group or an embossed pattern of parallel lines formed by parallel straight lines, and the cross section of the embossed shape formed on the boundary surface has a rectangular wave with rounded corners. With a smooth shape and a smooth periodic function curve or pseudo-periodic function curve, it is not seen in conventional decorative sheets, has an excellent design and has a three-dimensional appearance. The glossy part has a pattern that synchronizes with stone, wood or cloth, and the glossy part that moves and changes depending on the direction of the light source or the direction of the observer's line of sight is reproduced. It is possible to obtain a decorative sheet having a fine stone, wood or cloth tone. As a principle of luster transfer, taking wood grain as an example, the surface luster of natural wood grain is not uniform throughout,
The "glossy part" and the "non-glossy part" are distributed in a pattern, and the pattern changes depending on the incident direction of the light beam from the light source and the viewing direction of the observer. That is, while the pattern shape of the glossy part changes and moves to another place,
The conventional specification is that no matter how the position of the light source or the observer is changed, the entire surface will be illuminated at once or not. Therefore,
The present inventor has reached the present invention as a specification capable of faithfully reproducing the surface gloss of a natural wood grain board as compared with the conventional specifications, after analyzing the surface texture of the natural wood grain board and its gloss change.
The present invention forms a groove in the shape of a waveform curve such as a sinusoidal curve so that the glossy portion becomes a pattern, and the shape and position of the glossy pattern are determined by the incident direction of the light beam from the light source and the observer's eye. We realized that it changes depending on the combination with the viewing direction. Further, a glittering layer (containing a pigment such as a light-scattering titanium dioxide-coated mica) was provided with a partial light-scattering property on the surface of the uneven pattern formed by the grooves. With the above configuration, we succeeded in reproducing the luster of the surface of the natural wood grain board more faithfully than the conventional specifications. The same can be said for the grain and luster of the wood grain.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the drawings. FIG. 1A is a schematic view showing an embossing step in the method for manufacturing a decorative sheet of the present invention. FIG.
(B) is a schematic diagram which shows the heating press process in the manufacturing method of the decorative sheet of this invention. FIG. 2 is a cross-sectional view of a decorative sheet obtained by the method for manufacturing a decorative sheet of the present invention. FIG. 4 (f) is a perspective view of a film having an embossed pattern (grain pattern) pattern layer on the lower portion of the decorative sheet of the present invention.

As shown in FIG. 2, the embossed decorative sheet 1 of the present invention is basically a transparent or translucent thermoplastic resin film 14, a pattern layer 16 (for example, a stone pattern printing layer), and a glitter layer. 17 and the thermoplastic resin film 15. The embossed cross section 3L formed on the boundary surface seen from the surface, that is, the boundary between the transparent or translucent thermoplastic resin film 14 and the embossed pattern layer 19, and the boundary surface between the embossed pattern layer 19 and the thermoplastic resin film 15. However, it is characterized in that a rectangular wave has rounded corners and has a smooth periodic function curve or a pseudo periodic function curve.

As such a shape, a rectangular wave, a triangular wave, a trapezoidal wave, etc., which itself has a curved shape with rounded corners, a sine wave, a Bessel function, an elliptic function cycloid curve, or the like. The shape is not particularly limited. Further, the pseudo-function curve referred to in the present invention does not have an accurate repeating period, but is not a single-shot pulse-like curve but has a period distributed in a certain range and is similar in appearance to a periodic function curve. . For example, it is an amplitude-modulated, frequency-modulated, or phase-modulated periodic function curve, or a voice signal wave.

The decorative sheet 18 of the present invention can be produced by printing on the thermoplastic resin film 15 by using an ink containing a glittering pigment, and using the glittering layer 17, a pattern layer (a stone pattern printing layer, a grain pattern). Print layer or texture pattern print layer) 16
Is provided, and the printing film 6 is manufactured.

Next, in the embossing step, an embossing plate may be formed by forming a groove group having a sinusoidal shape with rounded corners and the like. The production of the embossed version of is difficult. Therefore, FIG.
The cross section as shown in (a) is rectangular wave (or triangular wave,
A trapezoidal wave may be used) or the like, and an embossing roll 4 on which a concavo-convex pattern of parallel curve groups that is easy to manufacture is formed. The embossing roll 4 is a cylindrical plate material, and in order to provide a desired groove-shaped concavo-convex pattern and concave-convex recessed portions, the cylindrical plate material is directly lathe-processed or milled with a mill formed by electroforming. The cutting method, electroforming method, photoetching method, or the like is performed. As a material of the embossing roll, metals such as copper, chromium and iron, synthetic resins such as NBR, epoxy resin, ebonite, ceramics such as glass and the like can be used. Next, FIG.
The printing film 6 is heated as shown in (a), and the embossing roll 4 is used to emboss the printing film 6 from the pattern layer 16 side to obtain an embossed pattern as shown in FIG. 4 (f). A film 7 was obtained. Next, FIG.
As shown in (b), the transparent thermoplastic resin film and the embossed pattern film are inserted into a heating press device having upper and lower heating plates 8 and 9 and then heated and pressed to heat the both. After adhering by fusion, it is cooled to obtain the decorative sheet 18 of the present invention.

Decorative sheet 18 produced as described above
The cross section of the embossed shape formed at the interface between the embossed pattern layer of the printing film 6 and the upper and lower thermoplastic resin films has a shape in which the corners of the rectangular wave are rounded as shown by 3L in FIG. It is a periodic function curve.

The groove-like concavo-convex pattern is formed on the printing surface side by using a flat plate or a roll-shaped embossing plate to heat and press the thermoplastic resin printing film as shown in FIG. 1 (a). However, the embossed shape is such that the width of the concave portion and the convex portion is 1 to 1000 μm, and preferably 60 to 100 μm.
It is. The recesses and the protrusions may have the same width or different widths. The depth of the recess is 5 to 100 μm.
And preferably 20 to 35 μm.

As the groove-shaped uneven pattern, in order to express the gloss of the pattern, a group of sinusoidal parallel curves as shown in FIG. 3 and other parallel curves as shown in FIGS. 4 (a) to 4 (c). A combination of a curved line group and a parallel curved line group and a parallel straight line group (e) is mainly used for wood grain or cloth, but a parallel straight line group (d) is preferable for stones and others (b) and (e) Can also be used.

As described above, the cross-sectional shape of the interface between the glittering solid printing layer and the thermoplastic resin film of the decorative sheet or the interface between the transparent thermoplastic resin film and the glittering solid printing layer is defined as a periodic function with smooth corners. By making a curve or a pseudo-periodic function curve, since it becomes an uneven shape similar to natural stone, wood or cloth, the light scattering effect reflected by the glittering solid printing layer is also similar, a natural stone with a three-dimensional effect, The luster of wood or cloth is reproduced, and a beautiful decorative sheet can be obtained.

As the transparent or translucent thermoplastic resin film 14 used in the decorative sheet 18 of the present invention,
Polyvinyl chloride film is mainly used, but in addition to this, acrylic, polyolefin, polyester, polyvinylidene chloride, polystyrene, polycarbonate, polyvinyl alcohol, polyamide and the like can be used. The thickness of the film is preferably 50 to 200 μm.

Further, the thermoplastic resin film 15 may be colored in addition to the above-mentioned transparent or translucent one, and the colored resin may be titanium oxide, carbon black, or valley. A film obtained by mixing other pigments, dyes, fillers, etc. is used.

The pattern layer is formed of a pattern such as a stone pattern, a wood pattern or a cloth pattern, and is formed by a printing method such as gravure printing. As a vehicle for ink, vinyl resin,
There are acrylic resins, nitrocellulose resins, aminoalkyd resins, butyral resins and the like, and inks are prepared by mixing these resins with pigments, dyes and other materials required for ink.

For example, the stone pattern layer is a conventionally known ink prepared by appropriately mixing and adjusting a colorant such as a pigment and a dye, an extender pigment, a solvent, a stabilizer, a plasticizer and the like in a vehicle, if necessary. A stone pattern of granite (granite), marble (travertine, onyx, marble, etc.) is formed by a known printing method such as a gravure printing method, a flexo printing method, a silk screen printing method. The vehicle may be, for example, cellulose resin such as nitrocellulose, styrene resin, acrylic resin, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, vinyl resin such as polyvinyl butyral, rosin. A natural or synthetic thermoplastic resin such as a system resin can be used.

The stone pattern layer has openings partially, and the lower glittering layer can be seen from there, or a dye-based transparent coloring agent is used for the stone pattern layer itself, or a pigment-based layer is used. However, it is advisable to reduce the amount added so that the glitter layer can be seen. Also,
In the case of utilizing the color of the colored thermoplastic resin film below the glitter layer, it is preferable that the blend amount of the glitter pigment in the glitter layer be suppressed to such an amount that the bottom can be seen through the glitter layer.

4D and 4F show an example of the stone pattern of the picture pattern layer 16, each region represents a different crystal grain. It is not always necessary to form each of these areas with a glitter ink. That is,
Due to having a glitter layer and the pattern layer, and due to the difference in refractive index between the transparent thermoplastic resin film as the upper layer,
This is because light is reflected at the interface between these layers, and a glittering feeling can be produced although it is smaller than the glittering by the glittering pigment.
The glitter layer is generally formed by solid printing, pattern printing or pattern printing using an ink containing a glitter pigment. Alternatively, a metallic thin film may be formed by vacuum vapor deposition, sputtering or the like to form the glitter layer. As the luster pigment, a mica pigment such as titanium dioxide-coated mica, a metal powder such as aluminum, and a pearlescent pigment such as fish scale foil are mainly used. In particular, when the glitter layer is formed of an ink layer in which the glitter pigment is dispersed in a thermoplastic resin binder, the dispersion density of the glitter pigment during embossing or hot pressing corresponds to the embossed pattern. Finely modulated. That is, the convex portion is a low density area (rough) of the bright pigment and the concave portion is a high density area (dense). As a result, the change in intensity (anisotropy) of the glitter (gloss) depending on the light source direction and the observation direction is emphasized, and the effect of reproducing the shine is excellent, which is preferable. Incidentally, examples of the thermoplastic resin binder preferable for producing such an effect are polyvinyl acetate, vinyl chloride vinyl acetate copolymer, polymethyl methacrylate, butyl polymethacrylate, polymethyl acrylate and polyacrylic. Butyl acid may be mentioned.

[0022]

EXAMPLES The decorative sheet of the present invention and the method for producing the same will be described below with reference to specific examples.

Example 1 Production of Embossing Roll As shown in FIG. 1 (a), the cross-sectional shape is a rectangular wave shape,
An embossing roll 4 having a groove and groove group having an uneven pattern as shown in FIG. 4D was formed by photoetching.

Laminating step As a thermoplastic resin film, a crystal grain having a large reflectance is expressed on a white colored vinyl chloride resin film (manufactured by Riken Vinyl Co., Ltd., 12P, plasticizer 12 phr, 0.1 mm thickness). In order to do so, solid printing was performed with a red ink containing a titanium dioxide-coated mica pearl pigment as a bright pigment. Next, as a stone pattern, a granite pattern was printed in two colors with a vinyl chloride-vinyl acetate ink to obtain a printing film. Then, in the stone pattern layer of this printing film, as shown in FIG.
By the embossing method shown in (1), hot embossing was performed so that the groove-like concavo-convex pattern layer side of the embossing roll 4 faced to obtain an embossed vinyl chloride sheet 7 having a stone pattern layer. In addition,
The embossing conditions were a drum temperature of 150 to 160 ° C. and a line speed of 6 to 10 m / min. A transparent vinyl chloride sheet (BHS Clear PVC Bando Kagaku Co., Ltd.) having a width of 1320 mm and a thickness of 0.1 mm so as to contact the embossed surface of the obtained embossed vinyl chloride sheet having a stone pattern layer is shown in FIG. 1 (b). The decorative sheet of the present invention was obtained by laminating and heat-sealing by the method of hot pressing as shown in. This decorative sheet was a decorative sheet having a glittering feeling peculiar to the crystal grains of the red granite stone pattern and a design expression with depth.

[0025]

As described above, the cross-sectional shape of the interface between the glittering solid printing layer of the decorative sheet and the colored thermoplastic resin film or the interface between the transparent thermoplastic resin film and the glittering solid printing layer has a smooth corner. By making a periodic function curve or pseudo-periodic function curve, it becomes an uneven shape similar to the cell wall of natural stone, cloth or natural wood, so the light scattering effect reflected by the glitter layer is similar, and natural wood with a three-dimensional effect is obtained. It reproduces the shine and the brilliance of natural stone, and you can get beautiful wood, stone, and fabric-like decorative sheets. According to the present invention, since it is possible to reproduce a luster similar to that of natural stone, wood or cloth having a three-dimensional effect, which is not seen in the conventional decorative sheet, and which has excellent designability,
It is possible to obtain a beautiful and realistic decorative sheet.

[Brief description of drawings]

FIG. 1 (a) is a schematic view showing an embossing step in the method for producing a decorative sheet of the present invention. (B) The schematic diagram which shows the heating press process in the manufacturing method of the decorative sheet of this invention.

FIG. 2 is a cross-sectional view of a decorative sheet obtained by the method for producing a decorative sheet of the present invention.

FIG. 3 is a plan view of an embossed surface when a sine wave line group is embossed.

FIG. 4 is a diagram showing various lines of an embossed pattern. FIG. 4F is a perspective view of a film having an embossed pattern (grain pattern) pattern layer on the lower portion of the decorative sheet of the present invention.
(Enlarged perspective view of FIG. 4D)

[Explanation of symbols]

 1 Touch Roll 2 Drum 3 Heater 4 Embossing Roll 5 Impressor 6 Printing Film 7 Embossed Pattern Film 8 Upper Heating Plate 9 Lower Heating Plate 10 Cushion Skin (5 mm Thickness) 11 Cushion Skin (5 mm Thickness) 12 Stainless Steel Plate 13 Stainless steel plate 14 Transparent thermoplastic resin film 15 Thermoplastic resin film 16 Picture pattern layer 17 Glittering layer 18 Decorative sheet 19 Embossed pattern layer 3L Embossed shape 20 Recessed portion of sinusoidal curve group 21 Convex portion of sinusoidal curve group 22 Parallel curve group 23 Parallel straight lines

Claims (3)

[Claims] 1. A thermoplastic resin film is printed on one side with a glitter layer and a picture pattern layer in this order, and an embossing plate is used on the printed side of this printing film to form parallel curve groups or parallel line groups. After embossing the concavo-convex pattern of the linear groove group,
By bonding a transparent or translucent thermoplastic resin film to the embossed surface by heat fusion with a hot press, the boundary surface between the thermoplastic resin film and the embossed pattern layer and the transparent or translucent thermoplastic resin film and the embossed surface On the boundary surface of the pattern layer, an embossed pattern of parallel-lined groove groups consisting of parallel curve groups or parallel straight line groups is formed, and the cross section of the embossed shape formed on the boundary surface,
A decorative sheet having a rectangular wave with rounded corners and a smooth periodic function curve or pseudo-periodic function curve. 2. A transparent or semi-transparent thermoplastic resin film is embossed on one side with an embossing plate to emboss a concavo-convex pattern of parallel-curve groups or parallel-line-shaped groove groups consisting of parallel straight-line groups, followed by another heat treatment. On one side of the plastic resin film, a glitter layer,
By printing in the order of the pattern layer, the printed surface of this printed film is heat-fused to the embossed surface by heat-bonding to bond the thermoplastic resin film to the boundary surface of the embossed pattern layer and transparent or translucent. An embossed pattern of parallel linear grooves or parallel linear grooves formed on the boundary surface between the thermoplastic resin film and the embossed pattern layer, which crosses the embossed shape formed on the boundary surface. A decorative sheet, characterized in that the surface has a shape in which the corners of a rectangular wave are rounded and has a smooth periodic function curve or a pseudo periodic function curve. 3. The glitter layer is formed of an ink layer containing a glitter pigment, and the number area density of the glitter pigment is adjacent to a portion of the embossed pattern which is embedded in a more transparent thermoplastic resin film. The region having a relatively low density is distributed, and the region adjacent to the portion projecting toward the thermoplastic resin film side is distributed so as to have a higher density. 4. Makeup sheet.