JP2017205959A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet having a special visual effect.SOLUTION: A decorative sheet has a first sheet (10) having an interference pattern-generating pattern layer (12), and a second sheet (20) having an interference pattern-generating pattern layer (22), wherein the interference pattern-generating pattern layer of the first sheet and the interference pattern-generating pattern layer of the second sheet are disposed through an air layer, and the first sheet has a retroreflective layer formed thereon.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sheet used for decoration, and relates to a decoration sheet using light interference.

  For example, Patent Document 1 discloses a decorative sheet whose pattern changes depending on the viewing direction. It is said that the appearance of the pattern changes by forming a pattern on each of the front and back sides of the sheet.

Japanese Patent Laid-Open No. 9-207254

  In the field of decorative sheets, it is desired to provide a decorative sheet having a new visual effect regardless of the prior art.

  In view of the above problems, an object of the present invention is to provide a decorative sheet having a specific visual effect.

  The present invention will be described below. For ease of understanding, reference numerals in the drawings are appended here in parentheses, but the present invention is not limited to this.

  One aspect of the present invention includes a first sheet (10) having an interference pattern generation pattern layer (12) and a second sheet (20) having an interference pattern generation pattern layer (22), and the first sheet The interference pattern generating pattern layer of the second sheet and the interference pattern generating pattern layer of the second sheet are arranged via an air layer, and the first sheet is a decorative sheet (1) in which a retroreflective layer (15) is formed. is there.

  This retroreflective layer may comprise a prism.

  The decorative sheet may be configured such that the interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet are not joined.

  In the decorative sheet, the interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet may be joined together at a part thereof.

  In addition, at least one of the interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet may have a form in which convex portions and concave portions are alternately arranged.

  Here, the convex portion may be in the form of a thin film.

  According to the present invention, generation of interference fringes and changes in interference fringes can be obtained, and the decorative sheet has a specific visual effect. Further, it is possible to enhance the glitter by retroreflection.

1 is a perspective view of a decorative sheet 1. FIG. 1 is a perspective view in which a part of a decorative sheet 1 is cut away. 1 is a cross-sectional view of a decorative sheet 1. FIG. It is the figure which expanded a part of FIG. FIG. 5A is a diagram illustrating an aspect of a scene where the decorative sheet 1 is distorted, and FIG. 5B is a diagram illustrating another aspect of the scene where the decorative sheet 1 is distorted. FIG. 4 is a diagram showing a part of a cross section of a decorative sheet 101. FIG. 4 is a diagram showing a part of a cross section of a decorative sheet 201. It is a figure showing a part of section of decoration sheet 301. It is a figure showing a part of section of decoration sheet 401. FIG. 6 is a diagram showing a part of a cross section of a decorative sheet 501.

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

FIG. 1 is a diagram for explaining a decorative sheet 1 according to a first embodiment, and is an external perspective view showing a part of the decorative sheet 1. FIG. 2 is a perspective view in which a part of the decorative sheet 1 shown in FIG. 1 is cut away so that the inside thereof can be seen. 3 is a cross-sectional view taken along the line III-III in FIG. Further, FIG. 4 shows an enlarged view of a part of FIG.
As can be seen from these drawings, the decorative sheet 1 includes a first sheet 10 and a second sheet 20.

  The first sheet 10 includes a base 11, an interference pattern generation pattern layer 12, and a retroreflective layer 15.

The base 11 is a plate-like part that supports the interference pattern generating pattern layer 12. The thickness of the base 11 is not particularly limited, but can be 25 μm or more and 200 μm or less. If the thickness is less than 25 μm, the first sheet 10 is easily torn, and if it is more than 200 μm, the first sheet 10 is not flexible enough to cause an interference pattern change as described later.
In the present invention, “interference” is used as a concept including moiré of periodic patterns in addition to interference as a wave of light waves (electromagnetic waves). Further, the “interference pattern” includes not only interference fringes due to light wave interference but also moire patterns (also referred to as moire interference fringes or moire fringes) between spatial periodic patterns. In the following embodiment, an interference pattern that expresses an interference pattern mainly due to moire is employed. However, the present invention is not limited to such a form, and a form that employs an interference pattern that mainly expresses interference fringes of light waves is also included.

  In this embodiment, the joint 11 a is provided at the end of the base 11, and is joined to the joint 21 a provided at the end of the base 21 of the second sheet 20.

  The interference pattern generation pattern layer 12 is a portion formed on one surface of the base 11 and is a layer having irregularities in this embodiment. In this embodiment, the interference pattern generating pattern layer 12 has a linear protrusion 13 extending in one direction (the y-axis direction in FIGS. 1 and 2), as can be seen from FIGS. . A plurality of linear protrusions 13 are different from the extending direction (hereinafter also referred to as “extending direction” or “longitudinal direction”) (in FIG. 1, orthogonal to the extending direction). are arranged in the x-axis direction). Accordingly, a gap is formed between the adjacent linear convex portions 13, and this gap portion becomes the linear concave portion 14. Thereby, it is set as the pattern in which an unevenness | corrugation is repeated.

  The linear convex portion 13 and the linear concave portion 14 of this embodiment have an isosceles triangle in the shape of a cross section (hereinafter also referred to as a main cutting plane) cut along a plane orthogonal to the extending direction (longitudinal direction). The top is arcuate. As can be seen from FIG. 3 and FIG. 4, in this embodiment, a trough-shaped linear concave portion 14 is formed between the mountain-shaped linear convex portions 13 having an isosceles triangular cross section.

  The interference pattern generation pattern layer 12 as described above may have a pattern that generates interference fringes in combination with the interference pattern generation pattern layer 22 of the second sheet 20 described later.

  The retroreflective layer 15 is a layer provided on the surface of the base 11 opposite to the side on which the interference pattern generation pattern layer 12 is disposed, and totally reflects at least a part of the incident light. It is a layer that enables retroreflection to be emitted in the incident direction. As long as retroreflection is possible, the specific form is not particularly limited, but in this embodiment, a linear prism extending in one direction (y-axis direction in FIGS. 1 and 2). 16. A plurality of linear prisms 16 are different from the extending direction (hereinafter also referred to as “extending direction” or “longitudinal direction”) (in FIG. 1, orthogonal to the extending direction). are arranged in the x-axis direction).

In order to enable retroreflection of the prism 16, in this embodiment, the prism 16 has a cross section (main cut surface) cut by a plane orthogonal to the extending direction (longitudinal direction) and a right isosceles triangle. Have. Thereby, retroreflection can be efficiently performed.
In this embodiment, the retroreflective layer 15 is formed with the prism 16 having a right isosceles triangular section. However, the present invention is not limited to this, and a plurality of cones, which are so-called corner cubes having a top portion of 90 °, are provided at the base portion 11. It may be arranged.

Here, the base 11, the interference pattern generation pattern layer 12, and the retroreflective layer 15 of the first sheet 10 may be integrated with the same material, or may be bonded together as the same material or different materials. .
The material which comprises the 1st sheet | seat 10 should just be comprised so that an interference fringe can be visually recognized from the at least one side of the decoration sheet 1, and can be retroreflected with the 1st sheet | seat 10. FIG. Specifically, for example, various resins such as urethane resin, polyvinyl chloride resin, polyamide resin (nylon), polyester resin, acrylic resin, polyolefin resin, and polyvinyl chloride resin can be used.

  The second sheet 20 includes a base 21 and an interference pattern generating pattern layer 22. The base 21 is provided with a joint 21a. However, the second sheet 20 does not have a retroreflective layer. Accordingly, the base 21 has the same configuration as the base 11, the interference pattern generation pattern layer 22 has the same configuration as the interference pattern generation pattern layer 12, and the joint 21a has the same configuration as the joint 11a.

  Of the surface of the base portion 21, the surface on which the interference pattern generating pattern layer 22 is not disposed may be a mat surface with minute irregularities. Thereby, the texture and the touch different from a smooth surface can be obtained.

However, as can be clearly understood from FIG. 4, the pitch p ′ of the linear protrusions 13 of the interference pattern generation pattern layer 12 provided in the first sheet 10 and the interference pattern generation pattern layer 22 provided in the second sheet 20. It is preferable that the pitch p of the linear protrusions 23 is different. Thereby, a moire interference fringe can be produced reliably.
Specific sizes of the pitch p and the pitch p ′ are not particularly limited, but a moire interval (intermediate point distance between adjacent dark portions of moire fringes) d expressed by the following formula (1) is 0.2 mm or more. Preferably, d is 0.5 mm or more, and more preferably d is 1.0 mm or more. If d is smaller than 0.2 mm, the moire pattern tends to be difficult to visually recognize. On the other hand, d is preferably 50 mm or less. If d is larger than 50 mm, there is a possibility that the design characteristic unique to the decorative sheet based on the interference fringes will not be sufficiently developed.
The moire interval d is determined by the following equation.
d = (0.5 · p) / (1−p ′ / p) (1)
Here, p represents the pitch (mm) on the side where the interval between the linear projections 23 is wide, and p ′ represents the pitch (mm) on the side where the interval between the linear projections 13 is narrow.

The first sheet 10 and the second sheet 20 are combined as follows to form the decorative sheet 1. That is, as can be seen from FIGS. 1 to 4, the first sheet 10 and the second sheet 20 are arranged so that the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 face each other. And the junction part 11a and the junction part 21a of the 1st sheet | seat 10 and the 2nd sheet | seat 20 are joined.
By forming in this way, the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 are disposed inside the base portion 11 and the base portion 21, and contact from the outside is prevented. A pattern can be exhibited.
In this embodiment, the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 are not joined.

  At this time, it is preferable that the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 have an interface with air. As a result, the refractive index difference between the interference pattern generation pattern layer 12, the interference pattern generation pattern layer 22 and the air can be increased, and interference fringes can be generated more clearly.

  The decorative sheet 1 as described above is disposed on the surface of various products and used as a decorative member that can visually recognize an interference pattern. Examples of products include surface materials for shoes, bags, sofas, chairs, vehicle seats, boxes, packaging containers, wall materials for buildings such as wallpaper and flooring, and surface decoration materials for household appliances such as refrigerators and television receivers. Etc.

  The decorative sheet 1 operates as follows. That is, so-called moire interference fringes are generated by the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22. As a result, an aesthetic feeling peculiar to interference fringes is generated.

Furthermore, in this embodiment, the decorative sheet 1 is configured to be distorted by an external force, and the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 are not joined. As such, each can move in its thickness direction. Thereby, the decorative sheet 1 can be distorted as illustrated in FIGS. 5A and 5B. FIG. 5A shows an example in which the first sheet 10 and the second sheet 20 are similarly distorted, and FIG. 5B shows an example in which the first sheet 10 and the second sheet 20 are distorted differently.
As a result, the relative position between the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 is changed due to the distortion with respect to the decorative sheet 1 before the distortion, so that an interference fringe different from that before the distortion occurs. To do. Therefore, it is possible to enjoy the aesthetic feeling due to the change of the interference fringes.

  In addition, since the retroreflective layer 15 is provided in the decorative sheet 1, as shown by the optical path example L in FIG. 4, the incident light can be efficiently returned and the glitter can be enhanced. .

  FIG. 6 is a view for explaining the second embodiment and is a view showing a part of a cross section of the decorative sheet 101. FIG. 6 corresponds to FIG. As can be seen from FIG. 6, the decorative sheet 101 is provided on the linear protrusion 13 provided on the interference pattern generation pattern layer 12 of the first sheet 10 and on the interference pattern generation pattern layer 22 of the second sheet 20. The line-shaped convex portion 23 is joined at a part thereof (joint portion 101a). The joining method is not particularly limited, and examples thereof include using an adhesive or a pressure-sensitive adhesive.

According to such a decorative sheet 101, as in the decorative sheet 1, so-called moire interference fringes are generated by the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22. As a result, an aesthetic feeling peculiar to interference fringes is generated.
The glittering property is enhanced by the retroreflective layer 15.

  Furthermore, in this embodiment, the decorative sheet 101 is configured to be distorted by an external force. More specifically, since the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 are joined, as shown by an arrow VI in FIG. 6, the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 can move together in the thickness direction. As a result, an interference fringe different from that before the distortion occurs due to the distortion on the decorative sheet 101 before the distortion. Therefore, it is possible to enjoy the aesthetic feeling due to the change of the interference fringes.

FIG. 7 is a diagram for explaining the third embodiment, and shows a part of the cross section of the decorative sheet 201. FIG. 7 corresponds to FIG. As can be seen from FIG. 7, the decorative sheet 201 is an example in which the interference pattern generation pattern layer 12 of the first sheet 10 and the interference pattern generation pattern layer 22 of the second sheet 20 are arranged so as not to face each other. That is, the interference pattern generating pattern layer 12 of the first sheet 10 is disposed so as to face the base portion 21 of the second sheet 20.
Even with such a decorative sheet 101, it is possible to obtain the same generation of interference fringes and changes thereof as in the decorative sheet 1. Further, the retroreflective layer 15 can improve the glitter.

  FIG. 8 is a diagram for explaining the fourth embodiment and is a diagram showing a part of the cross section of the decorative sheet 301. FIG. 8 corresponds to FIG. As can be seen from FIG. 8, the decorative sheet 301 includes a first sheet 310, a second sheet 320, and an exterior material 330.

In the first sheet 310, the interference pattern generating pattern layer 12 and the retroreflective layer 15 are laminated on the base 311. The first sheet 310 is different from the first sheet 10 in that the base 311 does not have a joint. Different. Others are the same as the first sheet 10.
The second sheet 320 is also different from the second sheet 20 in that the interference pattern generating pattern layer 22 is laminated on the base 321 and the base 321 does not have a joint. Others are the same as the second sheet 20.
As can be seen from the above, the first sheet 310 and the second sheet 320 are not joined.

  The exterior material 330 of the decorative sheet 301 has a bag shape, and the first sheet 310 and the second sheet 320 are included therein. Thereby, both that are not joined are held. In this embodiment, like the decorative sheet 1, the interference pattern generation pattern layer 12 and the interference pattern generation pattern layer 22 are arranged to face each other. However, the present invention is not limited to this, and for example, it can be arranged as in the above-described form or the form described below.

  According to such a decorative sheet 301, in addition to the operation described in the decorative sheet 1, the first sheet 310 and the second sheet 320 are centered in the normal direction of the sheet surface as indicated by an arrow VIII in FIG. And a further interference fringe change can be obtained.

  FIG. 9 is a diagram for explaining the fifth embodiment and is a diagram showing a part of the cross section of the decorative sheet 401. FIG. 9 corresponds to FIG. As can be seen from FIG. 9, the decorative sheet 401 includes the first sheet 10 and the second sheet 420.

The first sheet 10 is the same as the first sheet 10 described in the decorative sheet 1.
On the other hand, the second sheet 420 has an interference pattern generation pattern layer 422 laminated on the base 21. The second sheet 420 is different from the second sheet 20 in that an interference pattern generation pattern layer 422 is used instead of the interference pattern generation pattern layer 22. In the interference pattern generating pattern layer 422 of the second sheet 420, the linear protrusions 423 are formed in an opaque thin film shape, and are arranged alternately with the linear recesses 424. Such linear protrusions 423 can be formed by printing such as silk screen printing, gravure printing, flexographic printing, and the like. The color of the linear convex portion can be appropriately selected from achromatic colors such as black, white and gray, and chromatic colors such as yellow, red and blue. The pitch of the interference pattern generating pattern layer between the first sheet 10 and the second sheet 20 may be designed in the same manner as in the first embodiment. The thickness of the linear protrusion 423 in the fifth embodiment can be set to about 1 μm to 100 μm.

  Also with such a decorative sheet 401, interference fringes and changes thereof can be obtained in the same manner as the decorative sheet 1 by the moire interference fringes formed by the interference pattern generating pattern layer 12 and the interference pattern generating pattern layer 422. Moreover, the improvement of the glitter by the retroreflection layer 15 is also obtained.

  FIG. 10 is a diagram for explaining the sixth embodiment and is a diagram showing a part of a cross section of the decorative sheet 501. FIG. 10 corresponds to FIG. As can be seen from FIG. 10, the decorative sheet 501 includes a first sheet 510 and a second sheet 420. The second sheet 420 is the same as the decorative sheet 401 described above.

  In the first sheet 510, the interference pattern generating pattern layer 512 and the retroreflective layer 15 are laminated on the base 11. The first sheet 510 is different from the first sheet 10 in that an interference pattern generation pattern layer 512 is used instead of the interference pattern generation pattern layer 12. In the interference pattern generating pattern layer 512 of the first sheet 510, the linear convex portions 513 are formed in an opaque thin film shape, and are arranged alternately with the linear concave portions 514. Such a linear convex part 513 can be formed by printing etc., for example.

  Even with such a decorative sheet 501, interference fringes and changes thereof can be obtained in the same manner as the decorative sheet 1 by moire interference fringes by the interference pattern generation pattern layer 512 and the interference pattern generation pattern layer 422. Moreover, the improvement of the glitter by the retroreflection layer 15 is also obtained.

1, 101, 201, 301, 401, 501 Decorative sheet 10, 310, 510 First sheet 11, 311 Base 12, 512 Interference pattern generation pattern 15 Retroreflective layer 16 Prism 20, 320, 420 Second sheet 22, 422 Interference pattern generation pattern

Claims (6)

A first sheet having an interference pattern generation pattern layer, and a second sheet having an interference pattern generation pattern layer,
The interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet are disposed via an air layer,
A decorative sheet in which a retroreflective layer is formed on the first sheet.   The decorative sheet according to claim 1, wherein the retroreflective layer is a prism.   The decorative sheet according to claim 1 or 2, wherein the interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet are not joined.   The decorative sheet according to claim 1 or 2, wherein the interference pattern generating pattern layer of the first sheet and the interference pattern generating pattern layer of the second sheet are joined together.   The at least one of the interference pattern generation pattern layer of the first sheet and the interference pattern generation pattern layer of the second sheet has a form in which convex portions and concave portions are alternately arranged. The decorative sheet as described.   The decorative sheet according to claim 5, wherein the convex portion has a thin film shape.

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