JP2010208212A - Decorative sheet and laminated board using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet which expresses radial transmitted lights corresponding to the number of directions of line patterns, and a laminated board having the same stuck to a transparent substrate. <P>SOLUTION: The decorative sheet has a plurality of line pattern groups each composed of a plurality of substantially linear line patterns, the line patterns forming irregular parts. The angle formed between the line patterns of one line pattern group and the line pattern of the other line pattern group is not less than 30° but not more than 90°. The laminated board includes the decorative sheet stuck to the transparent substrate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a decorative sheet for expressing a radially transmitted light beam and a laminated board using the decorative sheet.

Conventionally, the following is known as a decorative sheet that is attached to the surface of a transparent substrate such as glass or an acrylic plate and imparts design properties to windows, partitions, or the like.
(1) A pattern printing layer and an adhesive layer were laminated on the back side of a transparent polyester film, and the transparent polyester film was a flat design because it came to the surface layer.
(2) A pattern printed layer is provided on a transparent polyester film, a transparent resin layer with a concavo-convex pattern is laminated on the surface, and an adhesive layer is laminated on the back surface of the transparent polyester film, and a reflective layer Because there was no, there was no glitter.

(3) In order to improve the above (1) and (2), a printing layer and a transparent thermoplastic resin layer are laminated on the vapor-deposited surface of the light-transmitting vapor-deposited film, and the upper surface of the transparent thermoplastic resin layer is A decorative sheet has also been proposed that provides glitter by providing linear fine irregularities. (See Patent Documents 1 and 2)

In addition, as a decorative material having a line-like uneven pattern,
(4) A decorative material having a line-shaped uneven pattern composed of a pattern in which a large number of line elements with irregular line lengths are arranged in a parallel relationship with fluctuations between adjacent line elements. Proposed (see Patent Document 3)
(5) The plan view pattern is composed of an assembly of the first line-shaped uneven pattern and the second line-shaped uneven pattern that do not completely overlap with each other, and the level surface in the depth direction has three levels. Alternatively, a decorative material having a composite line-like uneven pattern composed of four stages has been proposed. (See Patent Document 4)
The proposals in (3) and (4) are intended to provide a cosmetic material that can express the texture of the wood surface due to “shining” of the grain into a natural feeling that is not artificial and unnatural. It does not control the direction of light that passes through. The line-like uneven pattern was also based on a curve.

JP-A-7-314631 JP-A-8-103982 JP 11-268500 A JP 2001-9907 A

  The present invention separates the concept of the above-described conventional decorative sheet having a line-shaped uneven pattern, and sticks the decorative sheet that expresses a radially transmitted light beam corresponding to the number of directions of the line to a transparent substrate. It is an object of the present invention to provide a laminated board.

  As a result of intensive studies in order to solve the above problems, the present inventors have a plurality of line groups composed of a plurality of substantially straight lines, and in the decorative sheet in which the concavo-convex part is formed by the lines. It has been found that a radial transmitted light beam cannot be obtained when the line direction of the line of fine irregularities due to the line is random and not controlled. And it discovered that the said subject could be solved by limiting the angle between line groups to a specific range. The present invention has been completed based on such findings.

That is, the present invention
(1) A decorative sheet having a plurality of line groups each composed of a plurality of substantially straight lines, and having an uneven portion formed by the lines, wherein one line group and another line group A decorative sheet, characterized in that the angle between the line and the line is 30 ° or more and 90 ° or less,
(2) The decorative sheet according to (1), wherein the unevenness portion has a surface roughness Rz of 7 to 100 μm,
(3) The decorative sheet according to (1) or (2), wherein the unevenness interval L of the uneven part is 40 to 200 μm,
(4) The decorative sheet according to any one of (1) to (3), wherein the total area of the line group occupies 40% or more of the entire surface of the decorative sheet,
(5) The decorative sheet according to any one of (1) to (4), wherein the distance between one line group and another line group is 1 mm or less, and (6) (1) to (5) above ) Is attached to a transparent substrate to provide a laminate.

  The decorative sheet of the present invention and the laminate obtained by sticking the decorative sheet to a transparent substrate can display bright radial transmitted light corresponding to the number of directions of lines, and can obtain high designability.

It is a schematic diagram which shows the cross section of the decorative sheet of this invention. It is a schematic diagram which shows an example of the manufacturing process of the decorative sheet of this invention. It is a schematic diagram which shows the 1st embodiment of arrangement | positioning of the line group of the decorative sheet of this invention. It is a schematic diagram which shows the 2nd embodiment of arrangement | positioning of the line group of the decorative sheet of this invention. It is a schematic diagram which shows the 3rd embodiment of arrangement | positioning of the line group of the decorative sheet of this invention. It is a schematic diagram which shows the 4th embodiment of arrangement | positioning of the line group of the decorative sheet of this invention. It is a schematic diagram which shows the 1st aspect of arrangement | positioning of the line group of the decorative sheet of a comparative example. It is a schematic diagram which shows the 2nd aspect of arrangement | positioning of the line group of the decorative sheet of a comparative example. It is a schematic diagram which shows the 3rd aspect of arrangement | positioning of the line group of the decorative sheet of a comparative example.

  The decorative sheet of the present invention is a decorative sheet having a plurality of line groups composed of a plurality of substantially straight lines, and in which an uneven portion is formed by the lines, and a line of one line group and other lines The angle formed by the lines of the line group is 30 ° or more and 90 ° or less. In the present invention, the reason why the line is required to be substantially linear is that if it is curved, the transmitted light is blurred, resulting in an unclear radial transmitted light or no radial transmitted light being exposed. It is. The straight line of the present invention is preferably linear so that a clearer radial transmitted light can be obtained. Here, “substantially linear” refers to a straight line or a curve having a curvature radius of 3.5 mm or more. In addition, the angle between one line group and another line group needs to be 30 ° or more. If the angle is less than 30 °, the radial transmitted light becomes unclear. Because.

The radial transmitted light in the present invention corresponds to the number of directions in the direction of each line of a plurality of line groups when visible light is irradiated on the decorative sheet at a substantially right angle, and is perpendicular to the line direction of each line. This means that transmitted light appears radially in the direction. For example, in the case where there are a plurality of line groups composed of a plurality of substantially straight lines, if the line directions of the lines are two directions perpendicular to each other, a cross-shaped transmitted light beam radiating in four equal directions is obtained. It is done. If the line directions of the lines are 4 directions and all are at an angle of 45 ° to each other, transmitted light rays radiating in the same 8 directions can be obtained, and the line directions of the lines are 6 directions and all are 30 ° to each other. If the angle is formed, a transmitted light beam radiating in 12 uniform directions can be obtained.
When there are seven or more line directions of the lines, there are necessarily two directions of lines that form an angle of less than 30 °, so the decorative sheet of the present invention cannot be obtained. In the present invention, a clear radial shape is obtained when the angle formed by one line of one line group and the other line of the other line group is preferably 35 ° or more, more preferably 45 ° or more. This is preferable in that transmitted light can be obtained.
In the present invention, the smaller one of the angles α ° and (180−α) ° formed by two substantially straight lines is referred to as “an angle formed by two substantially straight lines”.

The line group in the present invention is composed of a plurality of substantially straight lines, but is preferably composed of 3 or more substantially straight lines, and is preferably composed of 5 or more substantially straight lines. Further preferred. Moreover, although there is no upper limit to the number of lines in the line group, the number of lines is preferably 100 or less, and more preferably 50 or less.
If the size of the line group is reduced and the number of line groups is increased, a more uniform design can be obtained.

In addition, even if visible light is irradiated at a substantially right angle to the side of the decorative sheet of the present invention where the unevenness is present, or conversely, the rear surface side of the decorative sheet of the present invention is irradiated at a substantially right angle, the radial transmitted light is similarly applied. Is obtained.
Visible light in the present invention may be any of sunlight, incandescent bulb illumination, fluorescent lamp illumination, LED illumination, laser light, etc., and does not limit the light source, but preferably LED illumination that is a highly directional light source. Light sources such as sunlight, incandescent bulb illumination, fluorescent lamp illumination, LED illumination, etc. with increased directivity by laser beam or the like, or by condensing light. A light source with high directivity or a light source with enhanced directivity by condensing or the like is preferable in that the radial transmitted light is clearly displayed.

  Hereinafter, the present invention will be further described with reference to the drawings. FIG. 1 is a schematic view showing a typical cross-sectional example of the decorative sheet of the present invention. The decorative sheet 10 of the present invention may be a transparent film 11 having a plurality of line groups consisting of a plurality of substantially straight lines on the surface, and the uneven portions 11a formed by the lines, as shown in FIG. The adhesive layer is laminated on the back surface of the transparent film 11 opposite to the concavo-convex part 11a of the transparent film 11 having a plurality of line groups composed of a plurality of substantially straight lines on the surface. Alternatively, the pressure-sensitive adhesive layer 12 may be formed, and the release sheet 13 may be adhered to the surface of the pressure-sensitive adhesive layer 12. The release sheet 13 protects the pressure-sensitive adhesive layer 12 and is removed when the decorative sheet 10 is attached to the transparent substrate. The transparent film 11 and the transparent substrate are interposed via the pressure-sensitive adhesive layer 12. Laminated.

The decorative sheet 10 of the present invention is manufactured by being shaped with an embossing plate, a molding die, or the like according to the material of the transparent film 11 that is the object to be given to the line group.
When the transparent film 11 is a thermoplastic resin sheet or the like and can be plastically deformed by hot pressure, it may be shaped by applying hot pressure with a shaping plate produced as an embossed plate. For embossing, various known presses and embossing machines such as a lithographic press machine and a roll embossing machine are used. The roll embossing method using a cylindrical embossing plate is good in productivity because the object to be applied can be continuously produced as a long belt-like sheet or the like. The heating and pressing conditions for the object to be applied vary depending on the thermo-pressure behavior of the object to be applied, but in the case of a normal thermoplastic resin, it is set to an appropriate temperature between the softening point or heat distortion temperature and the melting point or melting temperature. Heat, press and shape the embossed plate, cool and fix the shape. Also, even when plastic deformation is not possible with a curable resin such as a thermosetting resin, it is shaped by applying hot pressure or pressure with an embossed plate at a stage where it can be plastically deformed with a solid before curing, or at a liquid stage If it can be handled, it can be shaped by using an embossed plate as a mold and curing. Shaping with an embossed plate is usually suitable when the object to be applied is a sheet or plate.

  In addition to providing a line-like uneven pattern directly on the decorative sheet 10 from the shaping plate, the second shaping plate is used as a second shaping plate that is once shaped from the shaping plate to a sheet or the like. An indirect concavo-convex pattern applying method, such as applying a plate-like concavo-convex pattern to the decorative sheet 10 using a plate, may be used. For example, a support sheet of a transfer sheet composed of a support sheet and a transfer layer is used as the second shaping plate. That is, a composite line-shaped uneven pattern is formed on the support sheet from the shaped plate, and the composite line-shaped uneven pattern is formed on the surface of the transfer layer transferred to the transfer target by the formed support sheet. For example, a method of applying with transfer. In this case, if the transfer sheet is inserted into the mold and molded, the surface of the molded body such as a resin can be simultaneously provided with a line-shaped uneven pattern together with a pattern or the like (so-called injection molding in injection molding). Transfer method in simultaneous painting method).

  Next, the typical example of the manufacturing method of the decorative sheet 10 of this invention is demonstrated based on FIG. FIG. 2 is a schematic diagram showing an example of the manufacturing process of the decorative sheet 10 of the present invention. In FIG. 2, the transparent film 11 supplied from the left side of the production line 20 is heated to 50 to 200 ° C. by the heating drum 21 and further heated or heated by the heater 22 to pass between the embossing plate 23 and the rubber roll 24. Thus, a plurality of line groups composed of a plurality of substantially straight lines having the concavo-convex portions 11 a are formed on the surface of the transparent film 11. The transparent film 11 on which a plurality of lines composed of a plurality of substantially straight lines are formed is wound on the discharge side as it is. The decorative sheet 10 of the present invention may be the transparent film 11 alone in which a plurality of line groups each composed of a plurality of substantially straight lines are formed.

In the case of the decorative sheet 10 made of the transparent film 11 alone, the pressure-sensitive adhesive layer 12 is laminated on the opposite side of the concave-convex portion 11a of the decorative sheet 10 and the release sheet 13 is adhered to the surface of the pressure-sensitive adhesive layer 12 later. The decorative sheet 10 having the configuration shown in FIG. 1 may be manufactured, or a laminate may be manufactured by disposing the pressure-sensitive adhesive layer 12 therebetween when laminating with a transparent substrate. In the former case, there is no restriction on the construction place of the laminated board, and the application development to various laminated boards becomes possible. In the latter case, the release sheet 13 is unnecessary, which is preferable from the viewpoint of resource saving.
Further, in the manufacturing process of FIG. 2, after a plurality of line groups consisting of a plurality of substantially straight lines having uneven portions 11 a are formed on the transparent film 11, the uneven portions 11 a of the transparent film 11 are formed on the same manufacturing line. 1 may be laminated on the opposite side, and a release sheet 13 may be stuck on the surface of the pressure-sensitive adhesive layer 12 to produce the decorative sheet 10 having the configuration shown in FIG.

A typical method for producing an embossed plate used in the present invention will be described.
(1) Preparation of manuscript image: First, an image in which a plurality of line groups composed of a plurality of substantially straight lines are present is created in a computer as digital data.
(2) Production of a composition image: Next, a line pattern of the image data is generated and arranged on a two-dimensional virtual plane to obtain a composition image as digital data. When a negative resist is used as the photosensitive resist, a positive image is used for each line. When a positive resist is used as the photosensitive resist, a negative image is used for each line.

(3) Resist film formation on plate material: On the other hand, the plate material used as the embossed plate may be any material as long as it is a material suitable for fulfilling the function as the embossed plate. A plate material can be used. For example, in order to corrode the plate material by etching, the plate material is preferably a metal such as copper or iron. A photosensitive resist film (hereinafter simply referred to as a resist film) is formed on the surface of such a plate material. For example, in general, the resist agent includes a negative type in which an exposed portion is cured, and a positive type in which an exposed portion is eluted by development, but any type may be used. Further, any method may be used for forming the resist film. For example, a resist agent may be directly applied to the surface of the plate material, or a resist film may be formed using a resist transfer film such as so-called carbon tissue.
(4) Patterning of resist film: Patterning of the resist film can be performed by an exposure method using an original film other than a beam scanning exposure method.

(5) Corrosion: Next, the plate material is corroded (etched) from the surface using the resist film (formation portion) remaining as an exposed portion on the plate material as a protective film. Corrosion uses a ferric chloride aqueous solution, a cupric chloride aqueous solution or the like when the plate material is copper or the like. Due to the corrosion, corrosion of the surface exposed portion of the plate material proceeds, and after completion of the corrosion, a concave portion having a desired shape is formed on the surface of the plate material. Then, if the resist film remaining on the plate material surface is removed after corrosion, an embossed plate having a desired shape can be obtained. (6) Further, usually, in order to increase the surface strength, plating such as chromium plating is performed to complete the embossed plate.
In the typical manufacturing process shown in FIG. 2, a cylinder (metal roll) is used as a plate material.

Next, the aspect of a line group is demonstrated based on drawing. Drawing 3 is a mimetic diagram showing the 1st embodiment of arrangement of the line group of decorative sheet 10 of the present invention. In FIG. 3, straight lines in two directions are alternately arranged in a checkered pattern line group at an angle of 90 °. Each line group is a square, the direction of each line is the same as the direction of the sides of the square, and the length of each line is the same.
In FIG. 3, even if the straight line is changed to a curved line having a curvature radius of 3.5 mm or more (for example, a curved line having a curvature radius of 4.0 to 7.0 mm), the effect of the present invention is achieved. Can be played. The same applies to FIGS. 4 to 6 described later.
FIG. 4 is a schematic diagram showing a second embodiment of the arrangement of line groups of the decorative sheet 10 of the present invention. In FIG. 4, straight lines in two directions are alternately arranged in a checkered pattern line group at an angle of 90 °, and each line group is the same as FIG. The direction of each line is 45 ° with the direction of the side of the square, and the length of each line is not the same.

FIG. 5 is a schematic diagram showing a third embodiment of the arrangement of line groups of the decorative sheet 10 of the present invention. In FIG. 5, the line groups are randomly arranged so that all the three lines of straight lines are at an angle of 60 ° with each other, and each line group has various shapes. In addition, the total integrated length in a predetermined area of each of the three straight lines in the three directions is the same as a whole.
FIG. 6 is a schematic diagram showing a fourth embodiment of the arrangement of the line groups of the decorative sheet 10 of the present invention. In FIG. 6, the line groups are randomly arranged so that all the 6-direction straight lines are at an angle of 30 ° with each other, and each line group has various shapes. In addition, the total integrated length in a predetermined area of each of the six directional linear lines is the same as a whole.

FIG. 7 is a schematic diagram showing a first mode of arrangement of the line group of the decorative sheet of the comparative example. In FIG. 7, among the straight lines in 6 directions, the angle of 25 ° in two directions, the angle of 35 ° in the other two directions, and the remaining lines form an angle of 30 °. Are randomly arranged. Each line group has various shapes. In FIG. 7, since the angle of 25 ° is formed in one of the two directions, a part of the radially transmitted light becomes unclear and the design effect is lowered.
FIG. 8 is a schematic diagram showing a second mode of arrangement of the line group of the decorative sheet of the comparative example. In FIG. 8, among four straight lines in four directions, an angle of 15 ° is formed in two directions, an angle of 25 ° is formed in another two directions, an angle of 50 ° is formed in another two directions, and Line groups are randomly arranged so as to form an angle of 90 ° in another two directions. Each line group has various shapes. In FIG. 8, since an angle of 15 ° is formed in two directions in one place and an angle of 25 ° is formed in two directions in the other place, the radial transmitted light becomes unclear and the design effect is lowered.

  FIG. 9 is a schematic diagram showing a third mode of arrangement of the line group of the decorative sheet of the comparative example. In FIG. 9, all of the plurality of lines are wavy from a curved shape having a curvature radius of 1.5 mm to a straight line (curvature radius ∞ mm), and the unevenness interval L of the unevenness portion is not constant. Radial transmitted light becomes very unclear and cannot have a design effect.

The surface roughness Rz of the concavo-convex portion of the decorative sheet 10 of the present invention is preferably 7 to 100 μm. If it is 7 μm or more, the radially transmitted light becomes clearer, and if it exceeds 100 μm, it may be difficult to obtain a bright radially transmitted light.
Here, the surface roughness Rz means “ten-point average roughness Rz” defined in Annex 1 (reference) of JIS B 0601: 2001, and is measured based on the old JIS standard JIS B 0601: 1994. .
Moreover, it is preferable that the uneven | corrugated space | interval L (refer FIG. 1) of the uneven | corrugated | grooved part 11a of the decorative sheet 10 of this invention is 40-200 micrometers, and it is more preferable that it is 40-100 micrometers. If it is 40 micrometers or more, since a radial transmitted light becomes clearer, it is preferable.
The height difference (depth of the recess) H (see FIG. 1) of the uneven portion 11a is usually about 1 to 100 m.

It is preferable that the total area where the line group of the decorative sheet 10 of the present invention is formed occupies 40% or more of the entire surface of the decorative sheet, and more preferably occupies 50% or more. If it is 40% or more, the radially transmitted light is suitably clear.
Further, in the decorative sheet 10 of the present invention, if the distance between one line group and the other line group is 1 mm or less, the radial transmitted light becomes clearer, and if the distance is 0.3 mm or less, the same More preferred for reasons.
In FIG. 6, the distance between one line group and another line group is 0.3 mm or less, and in FIGS. 1 to 5, 7 and 8, one line group is in contact with another line group. The distance is less than 0.01 mm.

The material of the transparent film 11 used for the decorative sheet 10 of the present invention is not particularly limited, and various thermoplastic resins or curable resins are used. For example, as the thermoplastic resin, polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, olefin resin such as olefin-based thermoplastic elastomer, polybutylene terephthalate, thermoplastic polyester resin such as polyethylene terephthalate, vinyl chloride resin, acrylic resin, There are ABS (acrylonitrile-butadiene-styrene copolymer) resin, polyamide resin, fluorine resin, etc., and curable resins include melamine resin, phenol resin, urethane resin, diallyl phthalate resin, unsaturated polyester resin, epoxy resin, etc. There are thermosetting resins, polyfunctional acrylate-based, epoxy-based ionizing radiation curable resins, and the like. Of these, vinyl chloride resin and polyethylene terephthalate resin are particularly preferable. The polyethylene terephthalate resin is preferably easily molded.
It is preferable that the thickness of the transparent film 11 before forming an uneven | corrugated | grooved part is 30-300 micrometers, and it is more preferable that it is 50-200 micrometers. If it is 30 micrometers or more, since the stability of the shaping | molding of an embossed sheet improves, it is preferable.

  The material of the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 12 laminated as necessary on the decorative sheet 10 of the present invention is rubber-based, acrylic based on acrylic acid or acrylic ester, or silicone resin-based Known ones such as those can be used. The pressure-sensitive adhesive composition can be applied by a known coating method such as roll coating or knife coating. The thickness of the pressure-sensitive adhesive layer 12 is preferably 1 to 100 μm, and more preferably 10 to 50 μm.

  The release sheet 13 used as necessary in the present invention is not particularly limited as long as it is a sheet such as a film that can be peeled off after coming into contact with the pressure-sensitive adhesive layer 12. Examples thereof include films and papers made of polyethylene terephthalate, polyethylene, polypropylene, etc., or films and papers coated with a release agent such as silicone (peeling treatment). The release sheet 13 is preferably peeled off because it is easy to peel off.

  The decorative sheet 10 of the present invention obtained as described above is adhered to a transparent substrate made of a plastic transparent plate such as an acrylic resin, a polycarbonate resin, or a polystyrene resin, or glass, and a laminated plate for various uses is manufactured. .

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
The surface roughness Rz was measured by the above method, and the shape of the uneven portion was confirmed by an electron micrograph. Moreover, the uneven | corrugated space | interval L (micrometer) of an uneven | corrugated | grooved part took 20 electron micrographs which have a visual field equivalent to FIGS. 3-9, and measured the uneven | corrugated space | interval L of the arbitrary 20 uneven | corrugated | grooved parts about each photograph. And the arithmetic mean of the value of these 400 places was computed. Further, the number of directions of the lines and the minimum angle (°) between the lines of one line group and the lines of the other line group are electron micrographs having a field of view equivalent to that shown in FIGS. 20 were photographed, the number of directions and the minimum angle of all lines in each line group of each photograph were measured, and the number of directions and the minimum angle of lines in the entire line group were calculated.

Examples 1-9 and Comparative Examples 1-4
Using a transparent film made of vinyl chloride with a thickness of 100 μm, and the production line shown in FIG. 2, the line group arrangement pattern, the line shape, the number of lines, the number of directions of the line group, and the minimum between the lines Angle (°), surface roughness Rz (μm), unevenness interval L (μm) of the uneven part, total area (%) in which the line group on the entire surface of the decorative sheet is formed, one line group and other Thirteen types of decorative sheets having a distance (mm) from the line group were prepared. All of the transparent films made of vinyl chloride were heated to 50 to 150 ° C. with a heating drum, further kept at 120 to 200 ° C. with a heater, and passed between the embossed plate and the rubber roll to form an uneven portion. Although the line in Example 2 is a curve, since the radius of curvature is large, it can be handled in the same way as a straight line, and the number of directions of the line can be specified as two. On the other hand, the lines of Comparative Examples 3 and 4 have a wide range of curvature radii from a curve with a radius of curvature of 1.5 mm to a curve with a radius of curvature of ∞ mm (ie, a straight line). I could not identify.
The resulting 13 types of decorative sheets were irradiated with LED illumination, and the diffused state of the transmitted light was visually confirmed, and judged according to the following evaluation criteria. The results are shown in Table 1.
A: A very clear radial transmitted light was obtained.
○: A clear radial transmitted light was obtained.
Δ: A slightly unclear radial transmitted light was obtained.
X: Unclear radial transmitted light was obtained, or radial transmitted light was not obtained.

  Next, a commercially available release sheet (a film that has been subjected to a release treatment with a silicone release agent) coated in advance with an acrylic pressure-sensitive adhesive composition as an adhesive on the opposite side of the uneven portions of the 13 types of decorative sheets obtained. Adhering was carried out to obtain 13 types of decorative sheets having the layer structure shown in FIG. Thereafter, the release sheet of these 13 kinds of decorative sheets was peeled off, and the pressure-sensitive adhesive layer surface was adhered to the glass plate for window glass to obtain 13 kinds of laminates. When these 13 types of laminates were irradiated with LED illumination and the diffused state of transmitted light was visually confirmed, the same results as in Table 1 were obtained.

As is clear from Table 1, the decorative sheets and laminates of Examples 1 to 9 all obtained clear radial transmitted light. In particular, the eight kinds of decorative sheets and laminates of Examples 1, 2, 4 to 9 all obtained very clear radial transmitted light. Further, the decorative sheet and laminate of Example 1 were slightly clearer than the decorative sheet and laminate of Example 2.
On the other hand, the decorative sheets and laminates of Comparative Examples 1 to 4 were not able to achieve the effects of the invention because only unclear radial transmitted light could be obtained or radial transmitted light could not be obtained.

  The decorative sheet of the present invention is a laminate that imparts a high design to a transparent adherend such as a glass window or partition when it is attached to the inner or outer surface of a glass of a store, a building, or the like, or a glass surface of a partition. A laminate such as a plate can be obtained. Moreover, it can be used for various transparent adherends, such as a plastic, a container, furniture, a wall, and household appliances, and laminated bodies, such as a laminated board which provides a high design, can be obtained.

10. Cosmetic sheet 11. Transparent film 11a. Uneven portion 12. 12. Adhesive layer Release sheet 20. 20. Production line for decorative sheet of the present invention Heating drum 22. Heater 23. Embossed version 24. Rubber roll

Claims (6)

  It is a decorative sheet having a plurality of line groups consisting of a plurality of substantially straight lines, in which uneven portions are formed by lines, and one line of one line group and another line of other line groups The decorative sheet is characterized in that the angle formed by is between 30 ° and 90 °.   The decorative sheet according to claim 1, wherein the unevenness portion has a surface roughness Rz of 7 to 100 μm.   The decorative sheet according to claim 1 or 2, wherein the unevenness interval L of the uneven part is 40 to 200 µm.   The decorative sheet according to any one of claims 1 to 3, wherein the total area where the line group is formed occupies 40% or more of the entire surface of the decorative sheet.   The decorative sheet according to any one of claims 1 to 4, wherein a distance between one line group and another line group is 1 mm or less.   The laminated board formed by sticking the decorative sheet in any one of Claims 1-5 on a transparent substrate.

Images