JPH0414448A - Sheet capable of producing lustrous appearance and production thereof - Google Patents

Abstract

PURPOSE:To obtain a lustrous appearance having distinctness and depth by a method wherein the depressed and raised patterns having specific line groups are provided on the rear side of a sheet base material and a bright resin or vapor deposition layer is additionally formed on the depressed and raised pattern side thereof. CONSTITUTION:A base material 2 consists of depressed and raised patterns 3 provided on the rear side thereof and a bright resin or vapor deposition layer 4 formed additionally on such pattern side. As the base material 2, synthetic resin sheet such as polyvinyl chloride and polyethylene is used. The depressed and raised pattern 3 consists of the groups of parallel curved lines 5 alone or suitably combined with the groups of parallel straight lines 6 and the patterns of the line groups compose the depressed and the raised parts having such shape that the width d1 of the raised part P and the width d2 of the depressed part Q are both 1-1,000mum in cross section. The depressed and raised surface 3 having the aforesaid patterns consists of the ionizing radiation hardenable resin which is hardened and shaped while it is being filled in an engraved roll plate and then transferred and shaped on the rear side of the base material 2. A bright resin or vapor deposition layer 4, coupled with the depressed and raised pattern 3, produces a bright and beautiful luster.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet that provides a shiny appearance and a method for manufacturing the same.

[Conventional technology and the problem to be solved by the invention]

In the field of decorative sheets, etc., in order to create a realistic design appearance that is close to that of natural materials such as wood grain and stone grain, there are products that are devised to produce the same shine observed in natural materials. be.

Specific examples include decorative sheets in which wood grain patterns are printed using ink containing glitter pigments such as pearl pigments on general sheet base materials, and decorative sheets that use glitter as sheet base materials. 2. Description of the Related Art Decorative sheets and the like are known, the surface of which is printed with a wood grain pattern or the like using ordinary printing ink. However, these sheet-like materials are extremely monotonous in that the light that appears appears constant, for example, along the shape of the printed pattern. Furthermore, the above-mentioned light does not have a property that the position of the light appears to move by changing the viewing angle, for example, like the light of natural materials, and it lacks a sense of realism.

In addition, there are also irregularities formed by heat embossing on the sheet base material, such as a faded-like drawn part with a depth and width of 5 to 10 μm and a glossy drawn part with a depth and width of 1 μm or less. There is also known an embossed decorative sheet that has a pattern and is configured to provide a glossy appearance. However, even in the case of this type of sheet-like material, the obtained shine appearance was uniform, and there was no movement of the shine due to changes in the direction of the viewpoint. In addition, since the sheet base material is made of thermoplastic material, it is difficult to form fine uneven patterns because the texture returns from a few μm to several tens of μm during embossing, and as a result, the shine is affected. It has not been possible to produce a desired shine appearance etc. that are slightly different. Furthermore, in order to obtain a more realistic shiny appearance, it has been proposed to form an uneven pattern on both sides of the sheet base material, but in that case, the base material would be wrinkled during embossing. It is difficult to perform heat embossing on both the front and back sides in two steps, considering the material of the base material, and it is impossible to form the desired uneven shape on both sides. It was close.

The present invention has been made to overcome the above-mentioned drawbacks of the prior art, and provides a highly designed illuminated appearance with a sense of realism that has not been seen before, such as movement and visibility depending on the viewing angle. The purpose of the present invention is to provide a sheet-like product and a method for manufacturing the same.

(Means for Solving the Problems) That is, the sheet that can obtain the shiny appearance of the present invention is applied to the back side of a transparent or translucent sheet base material, at least within the recesses of a roll intaglio plate in which the sheet base material is brought into contact with the back surface of the sheet base material. It is made of an ionizing radiation curable resin that is released from the mold after being brought into close contact with the base material side at the same time as being cured and molded, and the width of the convex part and the concave part is 1 to 10 [)0.
An uneven pattern consisting of a pattern of a group of parallel curves or a group of lines combining a group of parallel curves and a group of parallel straight lines of μm is provided,
Further, a light-resistant resin or a metal vapor deposition layer is provided on the entire surface or a portion of the back side of the uneven pattern.

The sheet of the present invention may further have a colored layer on the back side of the glitter resin or metal vapor deposited layer.

Further, in the manufacturing method of the present invention, the width of the convex portion and the four portions is 1 to 100 mm.
A roll intaglio plate with a plate concavity for forming an uneven pattern consisting of a line group pattern of 0 μm parallel curves or a combination of parallel curves and parallel straight lines is used, and at least the plate concavities of the roll intaglio plate are exposed to ionizing radiation. The above-mentioned resin is filled with a curable resin and brought into contact with a transparent or translucent sheet base material, and while the base material is in contact with the intaglio, ionizing radiation is irradiated to interpose the resin between the base material and the intaglio. After curing the resin and the base material, the base material is peeled off from the intaglio plate to form an uneven pattern on the back side of the sheet base material, and then a printing method is applied to the back side of the uneven pattern on the sheet base material. has a structure in which a glittering resin or metal vapor deposited layer is formed by a vapor deposition method.

〔Example] Examples of the present invention will be described below based on the V plane.

As shown in FIG. 1, the sheet 1 that can obtain the shiny appearance of the present invention includes a sheet base material 2, a concave-convex pattern 3 provided on the back surface of the base material 2, and a glittering resin further provided on the concave-convex pattern surface side. Alternatively, it is composed of a metal vapor deposited layer 4.

The sheet base material 2 is not particularly limited as long as it is transparent or translucent, and the material and material may be changed depending on the purpose of the sheet 1.
Thickness etc. are selected appropriately. For example, as the base material 2, a synthetic resin sheet (film) such as polyvinyl chloride, polyethylene, polypropylene, acrylic, polyester, polyimide, polystyrene, acrylonitrile butadiene styrene copolymer (ABS), etc. can be used. Further, as the base material 2, a material partially printed for decoration may be used as required.

The concave-convex pattern 3 is an element for creating a shiny appearance, and in particular, it is a concave-convex pattern that has the role of creating a visible glow that moves depending on the viewing angle. That is, uneven pattern 3
When viewed from above as shown in Fig. 2, the pattern of the parallel curve group 5 ((a), (C) and (d) in the figure) or the parallel curve group 5 and the parallel straight line group 6 are appropriately combined. It consists of a pattern of line groups (see figure (b)),
As shown in FIG. 3, the line group pattern has a cross-sectional shape in which the width of the convex portion P: dl and the width of the concave portion Q: d are 1 to 10.
It has an uneven shape with a diameter of 00 μm. Uneven pattern 3
has a base layer portion R as shown in FIG.
It is common to have a structure in which a convex portion P and a concave portion Q are formed on the top, but as shown in FIG. It may be of a structure in which the groove is a concave portion.

A typical example of a group of parallel curves is one in which a plurality of connected curve units such as sine waves, cycloid curves, circular arcs, etc. are arranged by moving parallel to each other. The line group pattern illustrated in FIG. 2(d) is a collection of line groups each having a parallel curve group in each region surrounded by a contour line, and the shape or shape of the contour line and the parallel curve group. This is an example of a pattern in which the line direction differs for each contour region. In particular, according to the line group pattern having the structure as illustrated in FIGS. 2(C) and 2(d), the so-called illuminated portions appear dispersed in clusters or spirals.
A heathered (mo<) lit appearance can be obtained. Furthermore, if the width of the convex portions and concave portions exceeds 1000 μm, each group of parallel lines will stand out to the extent that each line can be identified, resulting in a geometric texture, which is unsuitable for reproducing the appearance of natural wood, etc. . It is more preferable that the widths d+ and di are 5 to 100 μm from the point of view of producing a clear and realistic shine. Further, the depth of the recess is usually about 1 to 100 μm, more preferably about 5 to 25 μm. Furthermore, the depth of the concave portion is not uniform, but is appropriately distributed to each partitioned area and made to vary regularly, thereby creating a luminous appearance in which the sense of illumination changes subtly depending on the area. be able to.

Moreover, the uneven shape 3 having the pattern configuration as described above is
It is composed of an ionizing radiation-curable resin that is hardened and shaped while being filled into the roll intaglio and then transferred and formed on the back side of the base material 2.

Since the concavo-convex pattern in the present invention is formed by the manufacturing method described above, it is a precise concavo-convex shape that is faithfully reproduced, although it has a fine pattern structure as described above.

The glittering resin or metal vapor deposited layer 4 is another element that creates a shiny appearance, and in combination with the uneven pattern 3, plays the role of creating a beautiful shine with shine. This layer 4 may be provided on the entire surface of the uneven pattern 3 side of the sheet base material 2 or may be provided partially. The glittering resin layer can be made of, for example, metal powder such as copper powder, aluminum powder, or brass, pigments with metallic luster using metal flakes, mica pigments such as titanium dioxide-coated mica, fish scale foil, pearlescent pigments such as bismuth chloride, etc. This layer is formed from a glitter ink containing pigments and interference gloss.

The glitter ink may contain a colored pigment.

The glittering resin may also be one in which the above-mentioned glittering pigment is kneaded or a resin film coated on the surface is formed into a Mi layer by a heat fusion method, a dry lamination method, or the like. The bright metal vapor deposited layer is made of aluminum, chromium, TiN,
A metal thin film formed by vapor-depositing metals such as nickel, copper, and stainless steel.

Further, although not particularly shown in the drawings, the sheet of the present invention may further have a colored layer laminated on the back side of the glittering resin or metal vapor deposited layer 4. By providing the colored layer, for example, the reflectance of light by the layer 4 can be increased to more effectively reproduce the shiny appearance, or when the sheet of the present invention is used by being attached to another member, the member The colored layer that can hide surface color, dirt, etc. can be formed by coating with ink or paint containing pigments such as titanium dioxide, or a resin film colored with the above pigment can be coated with adhesive or Examples include those attached by heat fusion.

The sheet 1 of the present invention having the above structure can be obtained by the following manufacturing method. FIG. 4 shows an embodiment of the manufacturing method of the present invention.

First, in the method of the present invention, a roll intaglio plate 7 is prepared in which the uneven pattern 3 to be formed is molded. 8 in the figure is the uneven pattern 3 mentioned above.
This is a plate portion formed by molding to correspond to the pattern shape in the figure. The printing part 8 is formed by electronic engraving, enching method,
This can be done by means such as mill pressing or electroforming.

Next, the roll intaglio plate 7 is used, for example, in the form illustrated in FIG. Then, as shown in the figure, the sheet base material 2
is supplied so as to pass between the intaglio roll 7 and the press roll 9, and the ionizing radiation curing resin 10 is supplied so as to fill at least the printing area 8 of the intaglio 7, and the back side of the base material 2 is intaglio. 7, and while the base material 2 is in contact with the intaglio plate 7, ionizing radiation is irradiated from the ionizing radiation irradiation device 11 to cure the resin and at the same time bring it into close contact with the base material side.

Thereafter, by peeling the sheet base material 2 from the intaglio plate 7, a sheet is formed with an uneven pattern 3 made of an ionizing radiation-curable resin shaped (cured) into a shape corresponding to the shape of the plate pattern part 8. is obtained.

The ionizing radiation curable resin can be supplied between the intaglio roll and the pressure roll, or on the surface of the W material by appropriate means such as a roll coating method or a knife coating method. As the ionizing radiation curable resin, known ultraviolet or electron beam curable resins can be used. Among them, if a solvent-free type is used, problems such as volume shrinkage, shape deformation, and bubble generation due to curing will not occur. In addition, a pre-drying step for the resin is not necessary, and a finer uneven shape can be reliably formed with good reproducibility. Irradiation with ionizing radiation may be performed from the base material side if the sheet base material 2 is transparent to ionizing radiation, or from the intaglio side if the intaglio plate 7 is made of a material hardenable by ionizing radiation. It may be carried out from the beginning, or it may be carried out from both sides of the base material and the intaglio (L). The degree of hardening due to irradiation with ionizing radiation is
It is at least to the extent that the resin loses fluidity and adhesion to the sheet base material. Further, after the base material is peeled off from the intaglio plate, ionizing radiation may be irradiated again for more complete curing.

Next, a glittering resin or metal vapor deposition layer 4 is formed on the sheet 1 on which the uneven pattern 3 is formed by a printing method, film lamination, or 78@ method, thereby producing a sheet of the present invention as illustrated in FIG. 1 is obtained.

As the printing method, known methods such as gravure printing, flexographic printing, and silk screen printing can be employed.

When forming the bright metal vapor-deposited layer partially, a known method for forming a partial metal thin film layer can be applied.

In the present invention, if necessary, printing may be performed on the surface side of the sheet base material, or other surface design treatments such as heat embossing may be performed. In addition, if a wood grain conduit pattern is printed on the surface of the sheet base material using colored ink such as black, brown, or brown containing a matting agent, with a lower gloss than the base material surface, the conduit printed area will become depressed due to the visual effect. It has the advantage of being visible in the open state.

Therefore, by using a sheet base material having a conduit printed portion as described above formed thereon, the wood grain conduit groove can be reproduced without the need to intentionally form a concave shape on the sheet surface using a heat embossing method.

The sorting of the present invention can be widely used in any field where a bright design appearance can be utilized. For example, it can be used by laminating decorative plywood, PVC sol steel plate, decorative M board, plastic member, glass adhesive sheet, etc.

In addition, the sheet of the present invention may be laminated by heating and/or pressure during plastic molding such as injection molding, extrusion molding, vacuum forming, etc., or the sheet of the present invention may be applied to the surface of a ready-made molded product.
They can also be used by laminating them by heating and/or pressing in a vacuum, compressed air, vacuum-pressure molding method, wrapping method, or the like.

Next, the present invention will be explained in more detail by giving specific examples.

Example 1 A wood grain pattern was printed on the back side of a transparent polyvinyl chloride film (manufactured by Riken Vinyl Co., Ltd.: W-50023P) with a thickness of 0.15 aaa using a gravure printing method.

As a roll intaglio plate, the basic curve is a curve expressed by the relational expression when the sheet substrate feeding direction is the y-axis and the width direction is the y-axis, and multiple curves are arranged parallel to each other at intervals of 50 μm in the y-axis direction. A metal roll intaglio plate having a plate depth (that is, the depth of the concave portions) of 20 μm was prepared by etching a line group pattern (the width of both the convex portions and the concave portions are 50 μm).

Next, this rolled intaglio plate was used in the manufacturing form as illustrated in FIG. HT509, viscosity 3000cps
) is supplied using the applicator roll coating method, and ultraviolet rays are irradiated from the film side with an ozone-containing high-pressure mercury lamp (120W/
The sheet feed speed was 30 cm using an irradiation device equipped with two lamps.
The film was irradiated under m/sin conditions and then peeled off.

Next, on the uneven surface of the film on which the uneven pattern of the line group pattern was formed, pearl ink was printed on the entire surface using a gravure printing method using a gravure plate having a plate depth of 60 μm to obtain a sheet of the present invention.

The resulting sheet had a concavo-convex pattern consisting of the above-mentioned fine parallel curve group pattern faithfully and clearly reproduced in detail, and when observed while changing the angle, a clear and deep glow appeared to be moving.

Moreover, the shiny exterior harmonized with the woodgrain print pattern, giving it a beautiful woodgrain exterior that was close to natural woodgrain.

Example 2 Figure 2(d) shows a line group pattern formed on an intaglio plate.
Example 1 was applied to Example 1, except that a solid printing layer using pearl ink was printed in a heathered pattern, and a solid printing layer was provided on the back side of the printing layer using white ink containing titanium dioxide pigment. A sheet was prepared in the same manner.

This sheet had a realistic heathered shine, and the overall appearance was beautiful and closely resembled that of natural wood.

[Effects of the Invention] As explained above, the sheet of the present invention has an uneven pattern in the specific line group pattern shape as described above on the back side of the sheet base material, and also has a glittering resin on the uneven pattern side. Alternatively, since a metal vapor deposited layer is provided, when observed from the sheet surface side, the uneven pattern seen through the sheet base material and the glittering resin or metal vapor deposited layer combine to provide a clear and deep shiny appearance. In particular, the illumination is unique and has a high design effect as it moves smoothly depending on the viewing angle. This illuminated appearance can be achieved, for example, by adjusting the shape of the uneven line group pattern, by appropriately employing line groups that combine parallel curve groups and parallel straight lines, or by applying glittering resin or metal vapor deposition layers to specific areas. It is also possible to set it so that it appears at a predetermined position by providing it partially in the area.

In addition, in the present invention, as described above, the uneven pattern is formed of an ionizing radiation-curable resin that is hardened and molded while being filled into the roll intaglio, so that the resulting uneven pattern has fine details. It is faithfully and clearly reproduced over the entire area, and this also creates a beautiful shine that cannot be obtained with conventional products. By forming a printed pattern layer of natural wood grain or the like as necessary, it is possible to create a shiny and realistic design appearance.

In particular, the method of the present invention employs a technique in which the uneven pattern is formed by curing and molding an ionizing radiation-curable resin using a roll intaglio as described above. The elemental fine uneven pattern can be easily and faithfully formed, and the sheet itself can be manufactured efficiently. Moreover, according to the method of the present invention, unlike forming an uneven pattern by heat embossing, there are no major restrictions regarding the material of the sheet base material (such as thermoplasticity required), and moreover, the uneven shape on the back side of the sheet base material is made of hardened ionizing radiation-cured resin. There is also an advantage that the surface side of the base material can be subjected to, for example, heat embossing, if necessary.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the sheet of the present invention, FIG. 2 is a plan view showing various examples of line group patterns with an uneven pattern, and FIG. 3 is a cross-sectional view showing an example of the cross-sectional shape of the uneven pattern. Explanatory diagram, FIG. 4 is an explanatory diagram showing one embodiment of the manufacturing method of the present invention. 1... Sheet that gives a shiny appearance 2... Sheet base material 3... Uneven pattern 4...
Glitter resin or metal vapor deposited layer 5...Group of parallel curves 6...Group of parallel straight lines 7...
- Roll intaglio 8... Plate recess 10... Ionizing radiation curing resin 7... Roll intaglio... Plate recess 10... Ionizing radiation curing resin

Claims (3)

[Claims] (1) Formed on the back side of a transparent or translucent sheet base material, after the sheet base material is brought into close contact with the base material side at least within the plate recesses of the roll intaglio plate that is brought into contact with the sheet base material, at the same time as curing and imprinting. It is made of an ionizing radiation-curable resin and is provided with an uneven pattern consisting of a pattern of parallel curves or a line group that is a combination of a group of parallel curves and a group of parallel straight lines, and the width of the convex portion and the concave portion is 1 to 1000 μm; 1. A sheet having a shiny appearance, characterized in that a glittering resin or metal vapor deposition layer is provided entirely or partially on the back side of the horizontal pattern. (2) A sheet having a shiny appearance according to claim 1, further comprising a colored layer provided on the back side of the glitter resin or metal vapor deposited layer. (3) A roll intaglio plate with concavities formed thereon is used for forming a concavo-convex pattern consisting of a line group pattern that is a combination of a group of parallel curves or a group of parallel curves and a group of parallel straight lines with a width of convex and concave portions of 1 to 1000 μm. At least the recesses of the rolled intaglio plate are filled with an ionizing radiation-curable resin, and a transparent or translucent sheet base material is brought into contact with the intaglio plate, and while the base material is in contact with the intaglio plate, ionizing radiation is irradiated to cure the base material. After curing the resin interposed between the sheet material and the intaglio plate to bring the resin and the base material into close contact, the base material is peeled off from the intaglio plate to form an uneven pattern on the back side of the sheet base material. A method for producing a sheet that provides a shiny appearance, characterized by forming a glittering resin or metal vapor deposition layer on the back side of the uneven pattern of a base material by a printing method or vapor deposition method.