WO2020040188A1

WO2020040188A1 - Decorative sheet production method, decorative sheet, and display device

Info

Publication number: WO2020040188A1
Application number: PCT/JP2019/032616
Authority: WO
Inventors: 山中　直人; 剛天野; 雅人水落
Original assignee: 大日本印刷株式会社
Priority date: 2018-08-21
Filing date: 2019-08-21
Publication date: 2020-02-27

Abstract

[Problem] To provide: a decorative sheet production method that is simple and inexpensive; and a decorative sheet having a novel configuration. [Solution] This decorative sheet production method is characterized by having: a step in which pattern sections 53 are formed on the surface of a transparent base material 51; a step in which a mesh member 70 having line sections 71 and openings 72 is pressed on to the surface of the base material 51, pattern sections 53 in areas facing the line sections 71 in the mesh member are pressed down into the base material 51, and pattern sections 53 in areas facing the openings 72 in the mesh member 70 are placed inside the openings 72; and a step in which the mesh member 70 is separated from the base material 51 together with the pattern sections 53 that were placed into the openings 72.

Description

Decorative sheet manufacturing method, decorative sheet, display device

The present invention relates to a decorative sheet manufacturing method, a decorative sheet, a display device with a decorative sheet, and a display device with a panel.

A display device that displays image light, such as that described in Patent Literature 1, is known. Such a display device is usually observed in black when no image is displayed. On the other hand, in the case of surface members such as automobiles, furniture, and house building materials, design is very important. At present, display devices applied to various fields are not only expected to have a function of simply displaying an image, but are also required to have harmony in design with the surrounding environment.

(4) In order to impart design to the display device, it has been considered to provide a decorative sheet facing the display surface of the display device. The decorative sheet can provide a design that can harmonize with the surrounding environment of the display device. Further, such a decorative sheet is provided in a region facing the display surface of the display device, as described in Patent Document 2, so that the image light of the display device can pass through the decorative sheet. It has a light transmitting portion such as a hole.

JP-A-9-114003 Japanese Patent No. 5688573

レーザー As a method for forming a light transmitting portion such as a hole in a decorative sheet, laser processing and etching processing are known. However, there is a problem that the decorative sheet subjected to these processes has a high manufacturing cost.

In view of the above points, an object of the present invention is to provide a method for manufacturing a decorative sheet which is simple and low-cost, and to provide a decorative sheet having a novel configuration.

In order to solve the above problem, the method for manufacturing a decorative sheet of the present invention includes a step of forming a pattern portion on the surface of a transparent base portion, and the process of forming a mesh member having a line portion and an opening portion. From the side on which the mesh member is pressed toward the base portion, the picture portion of the region facing the line portion of the mesh member is pushed into the base portion, and the region of the mesh member facing the opening portion is pressed. The method further comprises: a step of putting the picture portion in the opening; and a step of separating the mesh member from the base member together with the picture portion in the opening.

Further, the method for manufacturing a decorative sheet of the present invention includes a step of forming a pattern portion on the surface of a transparent base portion, and pressing a pressing member having a concave portion from the side where the pattern portion is formed to the base portion. Pushing toward the, pressing the pattern portion of the region facing the region other than the concave portion of the pressing member into the base portion, the step of separating the pressing member from the base portion, and in the base portion Removing the non-pressed picture portion from the base material portion. The pressing member may include a metal foil in which the concave portion is formed by patterning.

In addition, the method for manufacturing a decorative sheet of the present invention includes a step of forming a pattern portion on the surface of a transparent base member, and forming a mesh member having a line portion and an opening on the side where the pattern portion is formed. Removing the picture portion from a region of the mesh member facing the line portion after pressing the substrate toward the substrate portion, and then separating the pattern portion from the substrate portion.

Further, the method for producing a decorative sheet of the present invention includes a step of forming a pattern portion on the surface of a transparent base member, and a pressing member having a concave portion and a convex portion. And removing the picture portion from a region of the pressing member facing the convex portion after pressing against the base portion and then separating from the base portion. The pressing member may include a metal foil in which the concave portion is formed by patterning.

The method for manufacturing a decorative sheet may further include a step of forming a heat seal layer after the step of forming the picture portion. Further, the method for manufacturing a decorative sheet may further include, after the step of removing the pattern portion, a step of transferring the pattern portion on the base portion to another transparent base portion. Good.

The decorative sheet of the present invention has a transparent base portion having a convex portion on the surface, and a picture portion provided in a region other than the convex portion on the surface of the base portion, the base material The convex portion of the portion is a transmission portion that transmits light. Further, the decorative sheet of the present invention may have a first film member welded from a side of the base member where the picture portion is provided. Further, the decorative sheet of the present invention is provided on a second film member laminated on the side of the substrate portion where the picture portion is provided, and provided on the substrate portion side of the second film member. And a first adhesive layer.

Further, the decorative sheet of the present invention has a transparent base portion, a picture portion provided on the base portion, and a transmission portion that is a non-forming portion of the picture portion, and the picture portion is The thickness increases as the distance from the transmission part increases. A heat seal layer may be provided between the base portion and the design portion, or on the opposite side of the design portion from the base portion.

表示 A display device with a decorative sheet of the present invention is characterized by having a display device having a display surface and the above-described decorative sheet provided to face the display surface.

The display device with a panel according to the present invention includes a display device having a display surface, a panel member having an opening, and the above-described decorative sheet provided facing the display surface, and the panel member has The display device is disposed between the display device and the decorative sheet such that the display surface is located within the opening when viewed from a normal direction to the display surface.

According to the present invention, it is possible to make the method for manufacturing a decorative sheet simple and low-cost.

1 is an exploded perspective view schematically illustrating a display device with a panel according to a first embodiment. FIG. 2 is an enlarged front view of the decorative sheet according to the first embodiment. It is a sectional view of a display with a panel of a 1st embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 1st embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 1st embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 1st embodiment. It is an enlarged front view of the mesh member used for formation of the transmission part of the decorative sheet of the first embodiment. It is an enlarged front view of the decoration sheet of a 2nd embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 2nd embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 2nd embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 2nd embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decorative sheet of a 2nd embodiment. It is an enlarged front view showing the pattern of the pressing member used for formation of the penetration part of the decoration sheet of a 2nd embodiment. It is an expanded sectional view of the decoration sheet manufactured by the manufacturing method of the decoration sheet of the 1st and 2nd embodiment. It is sectional drawing of the decoration sheet of the modification of 1st and 2nd embodiment. It is sectional drawing of the panel with a decoration sheet of another modification of 1st and 2nd embodiment. It is a conceptual sectional view showing flattening processing of a picture part and a shielding part of a decoration sheet of a 1st embodiment. It is a conceptual sectional view showing flattening processing of a picture part and a shielding part of a decoration sheet of a 1st embodiment. It is a conceptual sectional view showing flattening processing of a picture part and a shielding part of a decoration sheet of a 1st embodiment. It is sectional drawing of the decoration sheet of the modification of 1st and 2nd embodiment. It is an enlarged front view of the decoration sheet of a 3rd embodiment. It is a conceptual sectional view showing a formation method of a penetration part of a decorative sheet of a 3rd embodiment. It is a conceptual sectional view showing a formation method of a penetration part of a decorative sheet of a 3rd embodiment. It is a conceptual sectional view showing a formation method of a penetration part of a decorative sheet of a 3rd embodiment. It is a conceptual sectional view showing a process of transfer processing of a picture part and a shielding part of a decoration sheet of a 3rd embodiment. It is a conceptual sectional view showing a process of transfer processing of a picture part and a shielding part of a decoration sheet of a 3rd embodiment. It is a conceptual sectional view showing a process of transfer processing of a picture part and a shielding part of a decoration sheet of a 3rd embodiment. It is a conceptual sectional view showing a process of transfer processing of a picture part and a shielding part of a decoration sheet of a 3rd embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decoration sheet of a 4th embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decoration sheet of a 4th embodiment. It is a conceptual sectional view showing the formation method of the penetration part of the decoration sheet of a 4th embodiment. It is an enlarged front view showing a pattern of a pressing member used for formation of a penetration part of a decorative sheet of a 4th embodiment. It is sectional drawing of the display apparatus with a panel of another embodiment of this invention. It is sectional drawing of the display apparatus with a decoration sheet of another embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, the scale and the size ratio in the vertical and horizontal directions are appropriately changed and exaggerated for the sake of convenience of illustration and understanding.

Note that in this specification, the terms “layer”, “sheet”, and “film” are not distinguished from each other based only on the difference in names. For example, the term “sheet” is a concept including members that can be called layers or films.

Further, in this specification, to specify the shape and geometric conditions and the degree thereof, for example, the term "parallel", "orthogonal", "identical" and the like, and the value of the length and angle, etc., strict Without being constrained by the meaning, it should be interpreted to include a range in which a similar function can be expected.

First, the decorative sheet 50, the decorative sheet-equipped panel 15, the decorative sheet-equipped display device 20, and the panel-equipped display device 10 of the first embodiment of the present invention will be described.

FIG. 1 is an exploded perspective view schematically showing a display device with a panel 10 of the first embodiment, FIG. 2 is an enlarged front view of a decorative sheet 50 of the first embodiment, and FIG. 1 is a sectional view of a display device with a panel 10 according to a first embodiment.

The decorative sheet 50 has a pattern portion 53 on which a pattern is formed, and a transmission portion 57 that is a non-formation portion of the pattern portion 53 and transmits image light from the display surface 41 of the display device 40. I have.

表示 The display device with a decorative sheet 20 includes a display device 40 having a display surface 41 and a decorative sheet 50 provided to face the display surface 41.

The display device with a panel 10 includes a display device 40 having a display surface 41 and a panel with a decorative sheet 15 provided to face the display surface 41, and the panel with a decorative sheet 15 has an opening 30a. , And a decorative sheet 50.

In the display device with a panel 10, the image light emitted from the display surface 41 of the display device 40 passes through the opening 30 a of the panel member 30 and the transmissive portion 57 of the decorative sheet 50, and enters the display surface 41. Is configured to be observed by an observer from the normal direction of the image.

In the example of FIG. 1, the decorative sheet 50, the display device with a decorative sheet 20, and the display device with a panel 10 are shown in a flat plate shape, but each component may have a curved shape. .

The display device 40 is a device that emits image light, and has a display surface 41 that can emit image light. As the display device 40, any display device such as a liquid crystal display, a plasma display, and an organic EL display can be used. The display surface 11 of such a display device 10 is typically a glass surface. Alternatively, the display device 10 may be a device that displays an image by transmitting light through a transparent film or the like on which printing is performed, or a device that displays light and dark by blocking a part of the light with a light blocking material. . In this case, the display device 10 includes a light source that emits light, a printed transparent film and a light shielding material.

The panel member 30 is disposed between the display device 40 and the decorative sheet 50, and has an opening 30a. The panel member 30 is, for example, a plate-like member having a thickness of 0.5 mm. The panel member 30 is arranged such that the display surface 41 of the display device 40 is located in the opening 30a when viewed from the normal direction to the display surface 41.

The panel member 30 includes a base layer 31 and a design layer 35 provided on the base layer 31. The base layer 31 is a member that can appropriately support the design layer 35. The design layer 35 is a member for imparting a design property to the panel member 30, and is typically a dark color such as black. Such a design layer 35 is formed of, for example, a resin containing a black pigment. Examples of the black pigment include carbon black and titanium black. The design layer 35 may have any design such as woodgrain or marble depending on the environment in which the panel member 30 is provided. The design layer 35 may not be necessary if it is not necessary.

パネル The panel member 30 of the first embodiment has a rectangular shape having a rectangular opening 30a. However, the embodiment of the present invention is not limited to this, and the panel member 30 may have a shape such as an L-shape, a U-shape, or the like, with a part removed from a rectangle. Further, the panel member 30 is not limited to a rectangle, and may have an arbitrary shape such as a circle. Further, the shape of the opening 30a may be any shape.

In addition, the panel member 30 of the present invention may be configured such that the portion facing the display surface 41 of the display device 40 is formed transparent without having the opening 30a. Further, the panel member 30 is composed of the transparent base material layer 31 and the design layer 35, and may have the opening 30a only in the design layer 35. Further, the panel member 30 may be formed entirely transparent without having the design layer 35. Further, the panel member 30 may be entirely formed as a translucent smoke plate. The panel member 30 is composed of a transparent base material layer 31 and a design layer 35. The design member 35 does not have an opening 30a and has an icon display portion through which light is transmitted. You may.

As shown in FIGS. 3 and 9, the decorative sheet 50 is provided in a region other than the transparent base portion 51 having a plurality of convex portions 51 a on the surface and the convex portions 51 a on the surface of the base portion 51. It has a picture part 53 and a shielding part 55. Further, the convex portion 51a of the base portion 51 is a transmitting portion 57 that transmits light.

The base member 51 is a transparent film-shaped member. As the base portion 51, any material may be used as long as it transmits visible light and can appropriately support the picture portion 53 and the shielding portion 55. For example, polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, Examples thereof include polycarbonate, polystyrene, acrylonitrile-styrene-butadiene copolymer, and cyclic polyolefin. Moreover, it is preferable that the base part 51 has a thickness of 25 μm or more and 500 μm or less in consideration of the visible light transmittance and the appropriate support of the picture part 53 and the shielding part 55.

加 The decorative sheet 50 of the first embodiment further has a laminate section (first film member) 58 made of a transparent resin. The laminating portion 58 is formed by thermally laminating a film member made of a transparent resin on the surface of the base portion 51 on which the picture portion 53 and the shielding portion 55 are formed. That is, the laminating section 58 is formed by a film member welded to the laminate including the base section 51, the pattern section 53, and the shielding section 55 from the side where the pattern section 53 and the shielding section 55 are formed. The laminating part 58 also functions as a layer that protects the picture part 53 and the shielding part 55. On the surface on which the laminating section 58 is laminated, a convex section 51a of the base section 51 is formed. The laminating section 58 is provided so as to smooth out the unevenness. Further, the laminating portion 58 can be bonded to the laminate including the base portion 51, the pattern portion 53, and the shielding portion 55 with high adhesion by the unevenness, and can stably protect the pattern portion 53 and the shielding portion 55. it can.

The laminating section 58 may be made of any material that transmits visible light and can appropriately protect the picture section 53 and the shielding section 55. For example, polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, Examples thereof include polystyrene, acrylonitrile-butadiene-styrene copolymer, and cyclic polyolefin. However, from the viewpoint of light transmittance, a material having the same refractive index as that of the base 51 is preferable. Further, the laminating section 58 can have any thickness. For example, when the purpose is only protection of the picture portion 53 and the shielding portion 55, the thickness can be about 75 μm to 125 μm. When the purpose is to improve the rigidity of the decorative sheet, about 125 μm to 3 mm. It can be.

The shielding portion 55 is arranged between the display surface 41 of the display device 40 and the design portion 53 of the decorative sheet 50, and covers the design portion 53 from the display surface 41 side of the display device 40. The shielding portion 55 has a function of absorbing light so that image light from the display surface 41 of the display device 40 does not enter the picture portion 53. The shielding portion 55 may include, for example, light absorbing particles in a binder resin. Examples of the light absorbing particles include black pigments such as carbon black and titanium black. As a specific example, the thickness of the shielding portion 55 is 1 μm or more and 20 μm or less. Note that the decorative sheet 50 may not have the shielding portion 55.

The pattern portion 53 can form an arbitrary pattern such as woodgrain, marble, single color, or the like.

The picture portion 53 is covered by the shielding portion 55 from the display device 40 side. The shielding portion 55 prevents image light from entering the picture portion 53. For this reason, it is possible to prevent the image light from being transmitted through the picture portion 53 and the design represented by the picture portion 53 and the image light from being mixed and observed. That is, it is possible to effectively prevent the color reproducibility of an image from deteriorating due to the absorption of visible light in a specific wavelength region by the picture portion 53.

The transmission portion 57 is a portion where the picture portion 53 is not formed when viewed from the front of the decorative sheet 50, and can transmit image light from the display surface 41 of the display device 40. The transmission section 57 of this embodiment is formed of the resin of the base section 51.

In the present specification, "transparent" in the "transparent substrate" has such a degree of transparency that the transparent substrate can be seen from one side to the other side through the transparent substrate. For example, it has a visible light transmittance of 30% or more, more preferably 70% or more. The visible light transmittance is measured at a wavelength of 380 nm to 780 nm using a spectrophotometer (“UV-3100PC” manufactured by Shimadzu Corporation, conforming to JIS K-0115) at each wavelength. Is specified as the average value of

In a state where an image is displayed on the display surface 41 of the display device 40, the image light is transmitted through the opening 30a of the panel member 30 and the transmitting portion 57 of the decorative sheet 50, and is observed by an external observer. The ratio of the transmissive portion 57 in a region of the decorative sheet 50 facing the display surface 41 of the display device 40 (hereinafter, referred to as “aperture ratio”) is such that the observer can observe the image light so as to endure practical use as the display device. In order to allow the observer to observe the image light with sufficient brightness, it is preferable to set it to 10% or more. In order to observe the image light, it is more preferable that the content be 15% or more.

In the state where no image is displayed on the display surface 41 of the display device 40, the design of the design portion of the decorative sheet 50 is observed. The opening ratio of the decorative sheet 50 is preferably 65% or less so that the observer can observe the design of the decorative sheet 50 to the extent that the observer can withstand practical use. In order to make the design of the present invention observable, the content is more preferably 60% or less.

In addition, the opening ratio of the decorative sheet 50 is calculated by the following formula: (opening ratio) = (total area of the transmitting part 57) / ((total area of the picture part 53) + (total area of the transmitting part 57)). It can be calculated using:

透過 The transmitting portion 57 of the decorative sheet 50 of the first embodiment can be formed by a method of forming the transmitting portion 57 described below. In the following example, the transmission portion 57 has a substantially square transmission portion 57 formed in a square lattice shape when viewed from the normal direction of the decorative sheet 50.

方法 A description will be given of a method of forming the transmitting portion 57 of the decorative sheet 50 according to the first embodiment.

4A to 4C are conceptual cross-sectional views illustrating a method of forming the transmitting portion 57 of the decorative sheet 50 of the first embodiment. FIG. 5 is a sectional view of the transmitting portion 57 of the decorative sheet 50 of the first embodiment. FIG. 4 is an enlarged front view of a mesh member 70 used for forming a mesh.

First, as shown in FIG. 4A, a picture portion 53 and a shielding portion 55 are formed on the surface of a transparent sheet-shaped base portion 51 by printing or the like.

Next, the mesh member 70 is pressed into the base 51 on which the picture 53 and the shield 55 are formed under a temperature environment in which the base 51, the picture 53 and the shield 55 are softened.

Here, as shown in FIG. 5, the mesh member 70 is a mesh member having a line portion 71 and an opening 72. The wire portion 71 is made of, for example, a metal material such as polyester, nylon, polyethylene, a fluorine-based material, and stainless steel. In the illustrated example, the mesh member 70 is configured as a woven fabric in which the wire portions 71 are woven with a gap. The mesh member 70 includes a line portion 71 extending in the first direction D1 and forming a warp arranged in a second direction D2 perpendicular to the first direction, and a weft extending in the second direction D2 and arranged in the first direction D1. And a line portion 71.

Next, as shown in FIG. 4B, when the mesh member 70 is pressed from the side of the pattern portion 53 and the shielding portion 55 to the laminate formed by forming the pattern portion 53 and the shielding portion 55 on the base portion 51. The pattern portion 53 and the shielding portion 55 in the region opposed to the line portion 71 of the mesh member 70 are pushed into the base member 51, and the pattern portion 53 and the shielding portion 55 in the region facing the opening 72 of the mesh member 70. Is to be put into the opening 72 of the mesh member 70. That is, the picture portion 53 and the shielding portion 55 that have entered the opening 72 of the mesh member 70 are held between the line portions 71 having a certain degree of elasticity.

Next, as shown in FIG. 4C, the mesh member 70 is separated from the base member 51 together with the pattern portion 53 and the shielding portion 55 taken into the opening 72 by separating the mesh member 70 from the base member 51.

In this process, the composition of the picture portion 53 and the shielding portion 55, the configuration of the mesh member 70, the processing temperature, the force for pressing the mesh member 70 against the base portion 51, and the speed for pressing the mesh member 70 against the base portion 51 (processing speed) By appropriately selecting and carrying out the process, the picture portion 53 and the shielding portion 55 in the region opposed to the line portion 71 of the mesh member 70 can be pushed into the base portion 51 and opposed to the opening 72 of the mesh member 70. Only the picture portion 53 and the shielding portion 55 in the region to be cut can be cut out from other portions of the picture portion 53 and the shielding portion 55 and removed from the base portion 51.

The conditions in this step include, for example, a mixture of acrylic, vinyl chloride-vinyl acetate copolymer, a polyester-based material, or the like as a constituent material of the picture portion 53 and the shielding portion 55, and a mesh member 70 of a wire portion. A polyester material having a thickness of 40 μm and an opening width of 50 μm is used. The processing temperature is 160 ° C., the force for pressing the mesh member 70 against the base member 51 is 3 MPa, and the processing speed is 1 m / min. It is possible.

結果 As a result of this step, the decorative sheet 50 having the transmission portions 57 having the same shape and arrangement as the openings 72 of the mesh member 70 is manufactured. In the method for manufacturing the decorative sheet 50, the mesh member 70 is usually disposable.

Next, the decorative sheet 50 according to the second embodiment of the present invention will be described.

構成 The configuration of the decorative sheet 50 of the second embodiment is the same as that of the decorative sheet 50 of the first embodiment, except for the method of forming, the shape, and the arrangement of the transmission portion 57.

FIG. 6 is an enlarged front view of the decorative sheet 50 of the second embodiment. The transmissive portion 57 of the decorative sheet 50 of the second embodiment has a circular transmissive portion 57 formed in a square lattice shape when viewed from the normal direction of the decorative sheet 50.

透過 Transmissive portion 57 of the present invention does not have to be formed in a square lattice shape. However, when the transmissive portions 57 are formed in a lattice shape, the image light of the display device 40 is transmitted uniformly, so that the image of the display device 40 is less likely to be uneven. Further, when the transmissive portions 57 are formed in a square lattice shape, the image of the display device 40 is further less likely to be uneven. Therefore, as for the transmission part 57 of the decorative sheet 50, it is preferable that the circular transmission part 57 is formed in a lattice shape when observed from the normal direction of the decoration sheet 50, and the circular transmission part 57 is formed in a square lattice shape. More preferably, it is formed. Further, the transmitting portion 57 may not be circular, and may be, for example, a square as in the first embodiment.

方法 A method of forming the transmitting portion 57 of the decorative sheet 50 according to the second embodiment will be described.

7A to 7D are conceptual cross-sectional views illustrating a method of forming the transmitting portion 57 of the decorative sheet 50 of the second embodiment. FIG. 8 is a sectional view of the transmitting portion 57 of the decorative sheet 50 of the second embodiment. FIG. 4 is an enlarged front view showing a pattern of a pressing member 80 used for forming a pattern.

First, as shown in FIG. 7A, a picture portion 53 and a shielding portion 55 are formed on the surface of a transparent sheet-like base portion 51 by printing or the like.

Next, under a temperature environment in which the base portion 51, the design portion 53 and the shielding portion 55 are softened, the pressing member 80 having the plurality of concave portions 80a is moved to the base portion 51 on which the design portion 53 and the shielding portion 55 are formed. Press

Here, the pressing member 80 is a sheet-shaped member (plate) having surface irregularities. As shown in FIGS. 7A to 8, the surface irregularities of the pressing member 80 are formed by providing the concave portions 80 a in a pattern corresponding to the arrangement pattern of the transmitting portions of the decorative sheet 50 to be produced. . In the pressing member 80, a region other than the concave portion of the surface is a pressing surface. The pressing member 80 has such a rigidity that it does not deform when pressed against the base portion 51, the pattern portion 53 and the shielding portion 55 of the decorative sheet 50, and the rigidity of the base member 51, the pattern portion 53 and the shielding portion 55. It is a member having releasability. In the example shown in FIGS. 7A to 7C, the pressing member 80 is configured as a copper foil bonded to a film base 81 via an adhesive layer 82. The concave portion 80a of the pressing member 80 is formed by patterning a copper foil using, for example, a photolithography technique. In the illustrated example, a pressing laminate 85 is formed by the pressing member 80, the film base 81, and the adhesive layer 82.

In this specification, the term “adhesion” is used to include the meaning of “adhesion”. Therefore, the “adhesive” used in the present specification also includes an adhesive, and the “adhesive layer” used in the present specification also includes an adhesive layer.

As shown in FIG. 7B, when the pressing member 80 is pressed from the side of the pattern portion 53 and the shielding portion 55 to the laminate formed by forming the pattern portion 53 on the base portion 51, the concave portion 80 a of the pressing member 80 is formed. The pattern portion 53 and the shielding portion 55 in the region opposed to the other portion (that is, the convex portion 80b) are pushed into the base portion 51.

(7) Next, as shown in FIG. 7C, the pressing member 80 is separated from the base 51 by peeling it off. At this time, a convex portion 51a is formed in a region of the base member 51 facing the concave portion 80a of the pressing member 80, and a state in which the pattern portion 53 and the shielding portion 55 are placed on the convex portion 51a. It has become.

Next, the surface of the base member 51 after the pressing member 80 has been peeled off is polished using, for example, a roll-type surface polishing device, a blast polishing device, a film polishing device, or the like, as shown in FIG. 7D. The picture part 53 and the shielding part 55 on the convex part 51 a of the material part 51 are removed from the base part 51.

In this process, the composition of the picture portion 53 and the shielding portion 55, the configuration of the pressing member 80, the processing temperature, the force for pressing the pressing member 80 against the base portion 51, and the speed for pressing the pressing member 80 against the base portion 51 (processing speed) By appropriately selecting the polishing conditions and the like, the pattern portion 53 and the shielding portion 55 in the region opposed to the concave portion 80a (the convex portion 80b) of the pressing member 80 are pushed down into the substrate portion 51, and The convex portion 51a is formed in the region of the pressing member 80 of the portion 51 facing the concave portion 80a, and the pattern portion 53 and the shielding portion 55 on the convex portion 51a of the base portion 51 can be removed from the base portion 51. it can.

The conditions of the process include, for example, acrylic, vinyl chloride-vinyl acetate copolymer, polyester-based material or the like as a constituent material of the picture portion 53 and the shielding portion 55, and a 80 μm thick copper foil as the pressing member 80. 80, a circular concave portion 80a having a diameter of 100 μm is arranged at a pitch of 200 μm. The processing temperature is 160 ° C., the force for pressing the pressing member 80 against the base member 51 is 3 MPa, and the processing speed is 1 m / min. It is possible to do.

結果 As a result of this step, a decorative sheet having the transmitting portions 57 having the same shape and arrangement as the concave portions 80a of the pressing member 80 is manufactured. Note that, in the method of manufacturing the decorative sheet 50, unlike the method of manufacturing the decorative sheet of the first embodiment, it is possible to repeatedly use the pressing member 80 used to form the transmission portion 57. . In the method for manufacturing a decorative sheet according to the second embodiment, the degree of freedom in the shape and arrangement of the transmission section 57 is high. In the example shown in FIG. 8, the plurality of concave portions 80a are arranged in a distributed manner. However, the pressing member 80 of the present invention may have a plurality of convex portions 80b arranged in a distributed manner.

The pressing member 80 of the second embodiment is configured as a copper foil adhered to the film base 81 via the adhesive layer 82, but the configuration of the present invention is not limited to this. Any member that has the necessary rigidity and releasability and can be patterned using photolithography technology can be suitably used as a pressing member. For example, as the pressing member 80, a metal foil such as copper or nickel, or a resin such as polyimide, polyetherketone, or polyetheretherketone can be used.

The pressing member 80 may be formed not on the film substrate 81 but on a suitable support such as a roll, that is, a member formed with a copper pattern on a roll film. The pressing member 80 may be formed as a patterned copper roll, that is, a member formed by etching a metal roll made of copper. As described above, when the pressing member 80 is formed as a roll, the roll also serves as the pressing roll, and the formation of the transmitting portion 57 of the decorative sheet 50 can be performed by a continuous process instead of a batch process. Has advantages.

FIG. 9 is an enlarged cross-sectional view of the decorative sheet 50 manufactured by the decorative sheet manufacturing method of the first and second embodiments. In other figures (for example, FIG. 3), the thickness of the pattern portion 53 and the shielding portion 55 of the decorative sheet and the height of the convex portion 51 a of the base portion 51 may be shown to be approximately the same. However, in practice, the thickness of the pattern portion 53 and the shielding portion 55 is about 5 μm to 10 μm, whereas the height of the projection 51 a of the base 51 is about 10 μm to 200 μm.

(4) In the conventional decorative sheet, the transmission part 57 is formed by removing the pattern part 53 and the shielding part 55 on the base part 51 by laser processing or the like. From this, the step between the picture part 53 and the shielding part 55 of the decorative sheet 50 and the transmission part 57 was only about 5 to 10 μm. On the other hand, the level difference H between the design part 53 and the shielding part 55 of the decorative sheet 50 of the first and second embodiments and the transmissive part 57 is about 10 μm to 100 μm, which is larger than that of the conventional decorative sheet. It is considerably large. Therefore, the decorative sheet 50 of the first and second embodiments has a larger surface area than the conventional decorative sheet 50, and as a result, the adhesion with other members is improved.

When the square transmitting portions 57 are arranged in a square lattice shape, the width of the transmitting portion 57 of the decorative sheet 50 is D, and the step between the picture portion 53 and the shielding portion 55 and the transmitting portion 57 is H. Then, the amount of increase in the surface area per transmission part 57 is 4DH. When the transmission portions 57 are arranged at a pitch P in a unit area having a length of one side L, the number of the transmission portions 57 in the unit area is (L / P) ² , and the surface area increase amount in the unit area Is 4DH × (L / P) ² . The amount of increase in the surface area is increased by increasing the width D or the step H of the transmitting portion 57 or decreasing the pitch P. Here, when the width D of the transmission portion 57 is increased, the pitch P also needs to be increased in order to maintain a constant aperture ratio. On the other hand, the step H can be increased to 40 μm, which is the mesh line width in the first embodiment, and can be increased to 80 μm, which is the height of the copper foil pattern, in the second embodiment. From this, it can be understood that the surface area increase rate per unit area is higher at the step H than at the width D of the transmission portion 57. That is, the step H between the picture portion 53 and the shielding portion 55 and the transmission portion 57 is larger than the width D of the transmission portion 57 in the contribution to the increase in the surface area.

Therefore, the decorative sheets 50 of the first and second embodiments have high adhesion between the base member 51 and the laminate member 58.

FIG. 10 is a cross-sectional view of a decorative sheet 50 according to a modification of the first and second embodiments. Unlike the first and second embodiments, the decorative sheet 50 of this modification has arbitrary functions such as surface protection and prevention of discoloration caused by light irradiation of the display device, which are bonded through the adhesive layer 60. Having a transparent film member (second film member) 59. The decorative sheet 50 of this embodiment is adhered to the film member 59 via the adhesive layer 60 on the surface of the base portion 51 having the convex portion 51a. More strictly, a film member 59 is adhered to the laminate of the base member 51, the pattern portion 53, and the shielding portion 55 from the side where the pattern portion 53, the shielding portion 55, and the unevenness are formed.

The film member 59 may be any material as long as it transmits visible light and can appropriately protect the picture portion 53 and the shielding portion 55. For example, polymethyl methacrylate, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, Examples include polystyrene, cyclic polyolefin, and acrylonitrile-butadiene-styrene copolymer. However, from the viewpoint of light transmittance, a material having the same refractive index as that of the base 51 is preferable. Further, the film member 59 can have any thickness. For example, when the purpose is only protection of the picture portion 53 and the shielding portion 55, the thickness can be 10 μm to 250 μm. When the purpose is also to improve the rigidity of the decorative sheet, the thickness can be 250 μm to 3 mm. be able to.

The adhesive layer 60 may be made of any material as long as it can transmit light and can appropriately bond the base member 51, the design part 53, and the transmission part 57 of the decorative sheet 50 to the film member 59. , Polyester-based materials, polyether-based materials, and the like.

加 The decorative sheet 50 of this modified example has a high adhesion between the base member 51, the picture portion 53, and the transmission portion 57 and the film member 59.

において In the example shown in FIG. 10, the panel member 30 can be used as the film member 59. In this case, the decorative sheet 50 and the panel member 30 constitute the decorative sheet-equipped panel 15. As the film member 59 constituting the panel member 30, for example, a plate member of a polycarbonate resin having a thickness of 3 mm can be used. The decorative sheet-equipped panel 15 has high adhesion between the decorative sheet 50 and the panel member 30.

Examples of the panel member 30 include (1) a base layer 31 and a design layer 35 having an opening 30a at a portion facing the display surface 41 of the display device 40, and (2) a base layer. A transparent substrate layer 31 and a design layer 35 which are formed of a transparent substrate layer 31 and a design layer 35 without the opening 30a and having a portion facing the display surface 41 of the display device 40. And (4) the entirety is formed without the design layer 35, and (5) the entirety is formed as a translucent smoke plate. And (6) the transparent substrate layer 31 and the design layer 35, which do not have the opening 30a, and the design layer 35 has an icon display portion that transmits light.

FIG. 11 is a cross-sectional view of a decorative sheet-equipped panel 15 according to another modification of the first and second embodiments. Unlike the first and second embodiments, the decorative sheet-attached panel 15 of this modification is bonded to the panel member 30 by thermal lamination without having the laminating portion 58. In other words, it can be said that the decorative sheet-equipped panel 15 of this modification uses the panel member 30 as the laminating part 58. The decorative sheet-equipped panel 15 also has high adhesion between the decorative sheet 50 and the panel member 30. As the panel member 30, the same member as the panel member 30 used in the example shown in FIG. 10 can be used.

FIGS. 12A, 12B, and 12C are cross-sectional views showing the flattening process of the picture portion 53 and the shielding portion 55 of the decorative sheet 50 according to the first embodiment.

As shown in FIG. 12A, the pattern portion 53 and the shielding portion 55 of the decorative sheet 50 of the first embodiment are in a curved state in a cross-sectional view, more specifically, as the substrate portion approaches the transmission portion 57. It may be located on the surface side of the base member 51, and may be located on the back side of the base member 51 as the distance from the transmission part 57 increases. Such a phenomenon mainly occurs due to the configuration of the mesh member 70, for example, the shape of the wire portion 71 of the mesh member 70, processing conditions, and the like. The flattening process of the picture portion 53 and the shielding portion 55 is a process of flattening the picture portion 53 and the shielding portion 55 by leveling the picture portion 53 and the shielding portion 55 in a curved state.

As described above, the decorative sheet 50 of the first and second embodiments has a large step H between the picture portion 53 and the shielding portion 55 and the transmitting portion 57, and has high adhesion between members. This is one of the advantages. However, in applications where the demand for adhesion between members is not high, or in applications where the demand for flattening the picture portion 53 and the shielding portion 55 is stronger than the requirement for adhesion between members, A flattening process of the picture portion 53 and the shielding portion 55 may be performed.

For example, when the picture portion 53 is made of a metallic material that reflects light, if the surface of the picture portion 53 is curved, light cannot be appropriately reflected. Request becomes stronger. On the other hand, when the picture portion 53 is made of a dark material, there is usually no need for flattening.

In the flattening process, as shown in FIG. 12A, a high-temperature press plate 91 is pressed downward from above the picture portion 53 and the shielding portion 55 of the decorative sheet 50, and a predetermined pressure is applied as shown in FIG. 12B. After pressing for a predetermined time, the press plate 91 is pulled up as shown in FIG. 12C.

The conditions of this flattening process are not particularly limited as long as the pattern portion 53 and the shielding portion 55 can be appropriately flattened. For example, the pressing temperature is 200 ° C., the pressing pressure is 2 MPa, and the pressing time is It may be 10 seconds.

In the decorative sheet 50 of the second embodiment, since the pressing member 80 having a higher degree of freedom in shape and the like than the mesh member 70 is used in the step of forming the transmitting portion 57, the pattern portion 53 and the shielding portion are used. The degree of curvature of 55 is relatively small. However, even in the decorative sheet 50 of the second embodiment, a flattening process may be performed.

In the decorative sheets 50 of the first and second embodiments described above, for example, as shown in FIG. 9, a pattern portion 53 is formed on a base member 51 or a transfer base member 511, and the pattern portion 53 is formed. The configuration was such that the shielding portion 55 was formed on the top 53. However, in the decorative sheet 50, as shown in FIG. 13, for example, the shielding part 55 is formed on the base part 51 or the transfer base part 511, and the pattern part 53 is formed on the shielding part 55. It may be configured as follows.

加 The decorative sheet 50 shown in FIG. 13 is used so that the observation surface is opposite to the decorative sheet shown in FIG. In this case, a resin film constituting a surface protection layer, etc., from the side where the pattern portion 53, the shielding portion 55, and the unevenness are formed with respect to the laminate of the base portion 51, the pattern portion 53, and the shielding portion 55 Is laminated as another member. As such a resin film constituting the surface protective layer, for example, a transparent resin film such as an acrylic resin or a polycarbonate resin is suitable.

加 In addition, the decorative sheets 50 of the first and second embodiments need not have the shielding portions 55. However, from the viewpoint of preventing the design of the picture portion 53 and the image light from the display device 40 from being mixed and observed, the decorative sheet 50 preferably has the shielding portion 55.

Next, the decorative sheet 50 according to the third embodiment of the present invention will be described.

FIG. 14 is an enlarged front view of the decorative sheet according to the third embodiment. The transmissive portion 57 of the decorative sheet 50 of the third embodiment has a substantially elliptical transmissive portion 57 formed in a square lattice shape when viewed from the normal direction of the decorative sheet 50. However, the substantially elliptical transmitting portions 57 are arranged such that the long axes of the substantially elliptical transmitting portions 57 adjacent to each other are orthogonal to each other. This arrangement is derived from the method of forming the transmission section 57 described below.

方法 A method for forming the transmitting portion 57 of the decorative sheet 50 according to the third embodiment will be described.

FIGS. 15A, 15B, and 15C are conceptual cross-sectional views illustrating a method of forming the transmitting portion 57 of the decorative sheet 50 according to the third embodiment. In this forming method, a mesh member 70 as shown in FIG. 5 is used as in the first embodiment.

First, as shown in FIG. 15A, the picture portion 53, the shielding portion 55, and the heat sealing layer 92 are formed on the surface of the transparent sheet-shaped transfer base portion 511 by printing or the like. As an example, the thickness of the picture portion 53 and the shielding portion 55 is 5 μm in total, and the thickness of the heat seal layer is 1 μm.

The transfer base 511 is made of a material that is harder than the base 51 of the decorative sheet 50 of the first embodiment. The transfer base 511 is made of, for example, polyethylene terephthalate, polyamide, polybutylene terephthalate, polyphenyl sulfide, polyimide, or the like. Details of the difference between the transfer base member 511 and the base member 51 of the first embodiment will be described later.

The heat seal layer 92 is a so-called heat welding layer, and more specifically, a layer which becomes adhesive when heated. The heat seal layer 92 is made of, for example, a material which becomes adhesive when heated, such as polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, and acrylic resin. Is done.

Next, under a temperature environment in which the transfer base portion 511 is not softened or the degree of softening is small, the picture portion 53 and the shielding portion 55 are softened, and the heat seal layer 92 has adhesiveness, 70 is pressed against the transfer base portion 511 on which the picture portion 53, the shielding portion 55, and the heat seal layer 92 are formed. In the first embodiment, the base member 51 is softened. However, the third embodiment is characterized in that the transfer base member 511 is not softened or the degree of softening is small.

As shown in FIG. 15B, the pattern 53, the shield 55, and the heat seal layer 92 are located on the side of the laminate formed by forming the pattern 53, the shield 55, and the heat seal layer 92 on the transfer base 511. When the mesh member 70 is pressed from above, the picture portion 53 and the shielding portion 55 in the region opposed to the line portion 71 of the mesh member 70 are pushed out from the region opposed to the line portion 71 of the mesh member 70, and the opening of the mesh member 70 is opened. It will move to the area of the part 72. In other words, the pattern portion 53 and the shielding portion 55 in the region opposed to the line portion 71 of the mesh member 70 have the transfer base portion 511 that is not softened or has a small degree of softening. It is moved along the surface of the transfer base 511 (along the sheet surface of the transfer base 511) without being pushed. As a result, the pattern portion 53 and the shielding portion 55 located in the region facing the line portion 71 of the mesh member 70 are extruded from the region facing the line portion 71 of the mesh member 70, and the region of the opening 72 of the mesh member 70. Will be moved to. The small degree of softening of the transfer base portion 511 means that the pattern portion 53 and the shielding portion 55 are softened to such an extent that such movement is possible. In this manner, the picture portion 53 and the shielding portion 55 are removed from the region of the surface of the transfer base portion 511 facing the line portion 71 of the mesh member 70.

Further, a part of the heat seal layer 92 in a region opposed to the line portion 71 of the mesh member 70 is fused to the surface of the line portion 71 of the mesh member 70, and the other portions are the pattern portion 53 and the shielding portion 55. Similarly, the mesh member 70 is extruded from the region facing the line portion 71 and moves to the region of the opening 72 of the mesh member 70.

Next, as shown in FIG. 15C, the mesh member 70 is separated from the transfer base portion 511, the picture portion 53, the shielding portion 55, and the heat seal layer 92.

At this time, the pattern portion residue 53a and the shielding portion residue 55a are adhered to the heat seal layer 92 fused to the wire portion 71 of the mesh member 70, and are removed from the surface of the transfer base portion 511. The pattern portion residue 53a and the shielding portion residue 55a could not move to the region of the opening 72 of the mesh member 70 in the region of the pattern portion 53 and the shielding portion 55 facing the line portion 71 of the mesh member 70. It is a residue of the picture part 53 and the shielding part 55.

Thus, the picture portion 53 and the shielding portion 55 are removed from the region of the surface of the transfer base portion 511 facing the line portion 71 of the mesh member 70. The part from which the picture part 53 and the shielding part 55 are removed becomes the transmitting part 57. Since the pattern portion residue 53a and the shielding portion residue 55a are removed by the heat seal layer 92 fused to the line portion 71 of the mesh member 70, the transmission portion 57 has the pattern portion residue 53a and the shielding portion residue 55a. Are suppressed.

{Circle around (5)} The picture part 53 and the shielding part 55 on the transfer base part 511 are in a state of being raised as they approach the transmission part 57. This is because most of the picture portion 53 and the shielding portion 55 removed from the region facing the line portion 71 of the mesh member 70 have moved to the region facing the opening 72 of the mesh member 70. As an example, the total thickness of the picture portion 53 and the shielding portion 55 including the heat seal layer 92 is about 5 μm at a location away from the transmission section 57, whereas the thickness at the location in contact with the transmission section 57 is 10 μm to 15 μm. About.

Such a process is performed by changing the composition of the transfer base portion 511, the pattern portion 53, the shielding portion 55, and the heat seal layer 92, the configuration of the mesh member 70, the processing temperature, the force for pressing the mesh member 70 against the transfer base portion 511, and the mesh. The speed (processing speed) at which the member 70 is pressed against the transfer base member 511 is appropriately selected and executed. Thereby, the picture part 53 and the shielding part 55 in the area opposed to the line part 71 of the mesh member 70 are moved to the area of the opening of the mesh member 70, and the picture part residue 53a and the shielding part residue 55a are removed from the mesh member 70. The pattern portion 53 and the shielding portion 55 can be removed from a region of the surface of the transfer base portion 511 facing the line portion 71 of the mesh member 70 by adhering to the heat seal layer 92 fused to the line portion 71. it can.

The conditions in such a step include, for example, using polyethylene terephthalate, polyamide, polybutylene terephthalate, polyphenyl sulfide, polyimide, or the like for the transfer base portion 511, and acrylic resin, vinyl chloride resin for the pattern portion 53 and the shielding portion 55. Using a mixture such as a vinyl acetate copolymer, a polyester-based material, or the like, the heat seal layer 92 is made of polypropylene, polyvinyl chloride, polystyrene, an acrylonitrile-styrene copolymer, an acrylonitrile-butadiene-styrene copolymer, an acrylic resin, or the like. As the mesh member 70, a polyester member having a line portion 71 having a thickness of 60 μm and an opening having a width of 130 μm is used. The processing temperature is set to 200 ° C., and the mesh member 70 is pressed against the transfer base portion 511. Set the force to 3MPa and add It is conceivable to set the working speed to 1 m / min.

In this step, by changing the force of pressing the mesh member 70 against the transfer base portion 511, the size of the formed transmission portion 57 (that is, each transmission portion observed from the normal direction of the decorative sheet 50) is changed. 57 (size). Specifically, when the force pressing the mesh member 70 against the transfer base portion 511 is increased, a large transmission portion 57 is formed. When the force pressing the mesh member 70 against the transfer base portion 511 is reduced, a small transmission portion 57 is formed. You.

The decorative sheet 50 of the third embodiment further transfers the pattern portion 53 and the shielding portion 55 on the transfer base portion 511 to the transferred base portion 512 made of a material having better formability. It can be manufactured through a process. This step is for enabling the decorative sheet 50 to be used for applications requiring more formability.

FIGS. 16A to 16D are conceptual cross-sectional views illustrating a process of a transfer process of the picture portion 53 and the shielding portion 55 of the decorative sheet 50 according to the third embodiment.

In the process of transferring the pattern portion 53 and the shielding portion 55, first, the transfer substrate portion 512, which is a transparent film-like member excellent in moldability, such as being softer than the transfer substrate portion 511 and having a higher elongation, is used. Prepare Preferred examples of the material of the transferred substrate portion 512 include an acrylonitrile-butadiene-styrene copolymer, a polyolefin resin, a styrene resin, an acrylic resin, a vinyl chloride resin, and a polycarbonate resin. One or more of these can be used in combination. As the polyolefin resin, a polypropylene resin is preferable. Among these resins, it is particularly preferable to use an acrylonitrile-butadiene-styrene copolymer or a polypropylene resin, and it is most preferable that the acrylonitrile-butadiene-styrene copolymer be used. preferable.

Next, as shown in FIG. 16A, the transfer base portion 511 is not softened or has a small degree of softening, the picture portion 53, the shielding portion 55, and the transferred base portion 512 are softened, and the heat seal layer 92 is bonded. Under the temperature environment having the property, the pattern portion 53, the shielding portion 55, and the heat seal layer 92 on the transfer base portion 511 are pressed against the transfer base portion 512 at a predetermined pressure for a predetermined time.

Next, as shown in FIG. 16B, the transfer base portion 511 is separated from the transfer base portion 512. At this time, since the adhesive force between the transferred substrate portion 512 and the heat seal layer 92 is larger than the adhesive force between the transfer substrate portion 511 and the picture portion 53, the adhesive force between the transferred substrate portion 512 and the pattern portion 53 is increased. Is transferred onto the base material 512 to be transferred.

At this time, the picture portion 53, the shielding portion 55, and the heat seal layer 92 on the transfer base portion 511 are directly transferred onto the transfer base portion 512. The shielding portion 55 is in a state of being raised as it approaches the transmission portion 57 as before the transfer. The degree of the swelling is the same as before the above-described transfer processing.

Thus, the step between the picture part 53 and the shielding part 55 and the transmissive part 57 is about 10 μm to 15 μm, which is considerably larger than the conventional decorative sheet. Therefore, the decorative sheet 50 in this state has improved adhesion with other members, similarly to the decorative sheet 50 of the first and second embodiments.

Next, as shown in FIGS. 16C and 16D, a surface protection layer for protecting the pattern portion 53 and the shielding portion 55 is provided on the surface of the base material 512 to which the pattern portion 53 and the shielding portion 55 are formed. 581 are formed. The surface protective layer 581 is formed by thermally laminating a film-shaped member made of a transparent resin on the surface of the base material 512 on which the picture portion 53 and the shielding portion 55 are formed. Is done.

The surface protection layer 581 is bonded to the laminate including the base material for transfer 512, the pattern portion 53 and the shielding portion 55 with high adhesion by the large step between the pattern portion 53 and the shielding portion 55 and the transmission portion 57. , The picture portion 53 and the shielding portion 55 can be stably protected. The surface protective layer 581 may be made of any material as long as it has appropriate moldability, transmits visible light, and can appropriately protect the picture portion 53 and the shielding portion 55. Examples of the material for the surface protective layer 581 include acrylic resins, polyethylene resins, polypropylene resins, polybutene resins, ethylene-propylene copolymer resins, ethylene-propylene-butene copolymer resins, and olefin thermoplastic elastomers. Polyurethane resins such as polyolefin resins, polyester resins such as polyethylene terephthalate (PET), polycarbonate resins, acrylic-modified urethane resins, polyester-modified urethane resins, and vinyl chloride-vinyl acetate copolymer-modified urethane resins; Examples thereof include a polystyrene resin, a vinyl chloride resin, a vinyl acetate resin, a vinyl chloride-vinyl acetate copolymer resin and the like, and one or a combination of two or more thereof can be used. Above all, an acrylic resin having excellent transparency and consequently imparting an excellent coating feeling is preferable. Examples of the acrylic resin include polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, and methyl (meth) acrylate-styrene. Acrylic resins such as terpolymers (however, (meth) acrylate refers to acrylate or methacrylate), modified acrylic resins such as fluorine, etc., as one kind or a mixture of two or more kinds, a single layer or two or more layers Used as a sheet of the laminate. As the surface protective layer 581, a commercially available resin film made of the above resin can be used, or a film can be formed by a known method using the above resin.

As a result of the above steps, the decorative sheet 50 having the transparent portions 57 having the shape and arrangement shown in FIG. 14 is manufactured.

Next, the decorative sheet 50 according to the fourth embodiment of the present invention will be described.

加 The decorative sheet 50 of the fourth embodiment is the same as the decorative sheet 50 of the third embodiment except for the method of forming, the shape, and the arrangement of the transmissive portions 57.

The shape and arrangement of the transmissive portions 57 observed from the normal direction of the decorative sheet 50 of the fourth embodiment are the same as those of the second embodiment shown in FIG. 6, and the circular transmissive portions 57 are formed in a square lattice shape. Are located. The shape and arrangement of the transmission portions 57 are not limited to those in which the circular transmission portions 57 are arranged in a square lattice, as in the second embodiment.

方法 A method of forming the transmitting portion 57 of the decorative sheet 50 according to the fourth embodiment will be described.

17A, 17B, and 17C are conceptual cross-sectional views illustrating a method of forming the transmitting portion 57 of the decorative sheet 50 according to the fourth embodiment. FIG. 18 is an enlarged front view showing a pattern of the pressing member 80 used for forming the transmitting portion 57 of the decorative sheet 50 of the fourth embodiment.

{Circle over (1)} First, as shown in FIG. 17A, a picture portion 53, a shielding portion 55, and a heat seal layer 92 are formed on the surface of a transparent sheet-shaped transfer base portion 511 by printing or the like. The transfer base member 511 is made of a material harder than the base member 51 of the decorative sheet 50 of the first embodiment, and is the same as the transfer base member 511 of the third embodiment. As an example, the thickness of the picture portion 53 and the shielding portion 55 is 5 μm in total, and the thickness of the heat seal layer is 1 μm.

Next, under a temperature environment in which the transfer base portion 511 is not softened or the degree of softening is small, the pattern portion 53 and the shielding portion 55 are softened, and the heat seal layer 92 has an adhesive property, The pressing member 80 having the concave portion 80a is pressed against the transfer base portion 511 on which the picture portion 53, the shielding portion 55, and the heat seal layer 92 are formed. The pressing member 80 is a sheet-shaped member (plate) having a concave portion 80a and a convex portion 80b on the surface. Except for the shape and arrangement of the concave portion 80a and the convex portion 80b, the pressing member 80 has the same structure as the pressing member 80 of the second embodiment. They have the same configuration.

As shown in FIG. 17B, the pattern 53, the shield 55, and the heat seal layer 92 are located on the side of the laminate formed by forming the pattern 53, the shield 55, and the heat seal layer 92 on the transfer base 511. When the pressing member 80 is pressed from above, the pattern portion 53 and the shielding portion 55 in the region facing the convex portion 80b of the pressing member 80 are pushed out from the region facing the convex portion 80b of the pressing member 80, and the concave portion of the pressing member 80 is pressed. It will move to the area of 80a. That is, the pattern portion 53 and the shielding portion 55 in the region opposed to the convex portion 80b of the pressing member 80 have the softening of the transfer base portion 511 or a small degree of softening. It is moved along the surface of the transfer base 511 (along the sheet surface of the transfer base 511) without being pushed. As a result, the picture portion 53 and the shielding portion 55 in the region facing the convex portion 80b of the pressing member 80 are pushed out from the region facing the convex portion 80b of the pressing member 80, and are moved to the region of the concave portion 80a of the pressing member 80. Will move. In this way, the pattern portion 53 and the shielding portion 55 are removed from the region of the surface of the transfer base portion 511 facing the convex portion 80b of the pressing member 80.

Further, a part of the heat seal layer 92 in a region facing the convex portion 80b of the pressing member 80 is fused to the surface of the convex portion 80b of the pressing member 80, and the other portions are the pattern portion 53 and the shielding portion. As in the case of 55, the pressing member 80 is pushed out of the region facing the convex portion 80 b and moves to the region of the concave portion 80 a of the pressing member 80. The pressing member 80 has a pattern shown in FIG.

Next, as shown in FIG. 17C, the pressing member 80 is separated from the transfer base portion 511, the picture portion 53, the shielding portion 55, and the heat seal layer 92.

At this time, the pattern portion residue 53a and the shielding portion residue 55a are adhered to the heat seal layer 92 fused to the projection 80b of the pressing member 80, and are removed from the surface of the transfer base portion 511. The pattern part residue 53a and the shielding part residue 55a are not moved to the area of the concave part 80a of the pressing member 80 of the pattern part 53 and the shielding part 55 in the area facing the convex part 80b of the pressing member 80. It is a residue of the part 53 and the shielding part 55.

Thus, the picture portion 53 and the shielding portion 55 are removed from the region of the surface of the transfer base portion 511 facing the convex portion 80b of the pressing member 80. The part from which the picture part 53 and the shielding part 55 are removed becomes the transmitting part 57. In addition, the picture portion 53 and the shielding portion 55 on the transfer base portion 511 are in a state of being more prominent as they come closer to the transmitting portion 57. This is because most of the picture portion 53 and the shielding portion 55 removed from the region facing the convex portion 80b of the pressing member 80 have moved to the region facing the concave portion 80a of the pressing member 80. As an example, the thickness of the picture portion 53 and the shielding portion 55 is about 5 μm in total at a position apart from the transmission portion 57 including the heat seal layer 92, whereas the thickness is about 10 μm to 15 μm at a portion in contact with the transmission portion 57. Becomes

Such a process is performed based on the composition of the transfer base portion 511, the pattern portion 53, the shielding portion 55, and the heat seal layer 92, the configuration of the pressing member 80, the processing temperature, the force for pressing the pressing member 80 against the transfer base portion 511, and the pressing. The speed (processing speed) at which the member 80 is pressed against the transfer base portion 511 is appropriately selected and executed. Thereby, the picture part 53 and the shielding part 55 in the area facing the convex part 80b of the pressing member 80 are moved to the area of the opening part of the pressing member 80, and the picture part residue 53a and the shielding part residue 55a are moved to the pressing member 80. The pattern portion 53 and the shielding portion 55 can be removed from the region of the surface of the transfer base portion 511 facing the convex portion 80b of the pressing member 80 by bonding the heat seal layer 92 fused to the convex portion 80b. .

The conditions in such a step include, for example, using polyethylene terephthalate, polyamide, polybutylene terephthalate, polyphenyl sulfide, polyimide, or the like for the transfer base portion 511, and acrylic, vinyl chloride-acetic acid for the picture portion 53 and the shielding portion 55. Use a mixture such as vinyl copolymer, polyester material, etc., and use polypropylene, polyvinyl chloride, polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, acrylic resin, etc. for the heat seal layer 92. Then, as the pressing member 80, a copper foil 80 having a thickness of 80 μm and circular protrusions 80 b having a diameter of 100 μm arranged at a pitch of 200 μm is used. The processing temperature is set to 200 ° C. The force to press against 511 is 3MPa , It is conceivable that the processing speed and 1m / min.

As in the third embodiment, the decorative sheet 50 of the fourth embodiment further includes a transfer base material portion formed by using a softer material for the picture portion 53 and the shielding portion 55 on the transfer base material portion 511. It is manufactured through a process of transferring to 512.

As a result of the above steps, the decorative sheet 50 having the transmitting portions 57 having the same shape and arrangement as the convex portions 80b of the pressing member 80 is manufactured. Although the pressing member 80 of the example shown in FIG. 17 has a plurality of convex portions 80b dispersed therein, the pressing member 80 of the present invention may have a plurality of concave portions 80a dispersed therein. Good.

In the decorative sheets 50 according to the third and fourth embodiments described above, the portion pressed by the mesh member 70 or the pressing member 80 becomes the transmissive portion 57, and the portion remaining as the picture portion 53 is the mesh member 70 or the pressing member 80. As a result, the deterioration of the design is suppressed as compared with the decorative sheet 50 of the first and second embodiments. This effect is particularly effective in the picture portion 53 having metal powder such as aluminum powder.

加 In addition, the decorative sheet 50 of the third and fourth embodiments is in a state of being raised as the picture portion 53 and the shielding portion 55 are closer to the transmitting portion 57 as described above. In other words, the decorative sheets 50 according to the third and fourth embodiments include the base member 512 to be transferred, the pattern portion 53 and the shielding portion 55 provided on the base member 512 to be transferred, and the pattern portion 53 and the shielding portion. The pattern portion 53 and the shielding portion 55 are thicker as they are closer to the transmitting portion 57. In the illustrated example, it seems that the thickness of the pattern portion 53 and the shielding portion 55 is constantly changing as the distance from the transmitting portion 57 is increased. Has changed, but may be constant in a region distant from the transmission section 57.

加 The decorative sheet 50 has a high adhesion between the laminate including the base material 512 to be transferred, the pattern 53 and the shield 55 and other members. Further, in such a decorative sheet 50, since the thickness of the portions of the design portion 53 and the shielding portion 55 that are in contact with the transmission portion 57 is large, the viewing angle of light transmitted through the transmission portion 57 can be suppressed. It has become something. The thickness of the portions of the picture portion 53 and the shielding portion 55 that are in contact with the transmitting portion 57 can be controlled to some extent by changing the conditions in the process of forming the transmitting portion 57. Therefore, in the decorative sheets 50 of the third and fourth embodiments, the viewing angle of the light transmitted through the transmission portion 57 is controlled to some extent.

加 Further, the decorative sheets 50 of the third and fourth embodiments have the heat seal layer 92 between the base material 512 to be transferred, the picture part 53 and the shielding part 55. The heat seal layer 92 suppresses the residue of the pattern portion residue 53 a and the shielding portion residue 55 a in the transmission portion 57, and the gap between the transferred substrate portion 512 and the pattern portion 53 and the shielding portion 55. Has higher adhesion.

In the decorative sheets 50 of the third and fourth embodiments, the pattern portion 53 and the shielding portion 55 on the transfer base portion 511 made of a relatively hard material are made of a material having more excellent formability. It is manufactured through a process of transferring onto the configured transfer-receiving substrate portion 512. This is to make the decorative sheet 50 more excellent in moldability. However, the decorative sheet 50 used for an application that does not have a strong demand for moldability may not have undergone such a transfer process. That is, the decorative sheet 50 used for an application that does not require strong moldability may have the pattern portion 53 and the shielding portion 55 on the transfer base portion 511. As an application that does not have a strong demand for moldability, for example, it is conceivable to apply it to a flat surface.

In this case, with respect to the laminated body of the transfer base portion 511, the pattern portion 53, and the shielding portion 55 as shown in FIG. A resin film or the like for protecting the shielding portion 55 may be laminated. As such a resin film, for example, a transparent resin film such as an acrylic resin and a polycarbonate resin is suitable.

加 Also, such a decorative sheet 50 has a heat seal layer 92 on the opposite side of the pattern base 53 and the shielding part 55 from the transfer base part 511. The heat seal layer 92 has an adhesive property when a resin film or the like for protecting the pattern part 53 and the shielding part 55 is laminated on the laminate of the transfer base part 511, the pattern part 53 and the shielding part 55. It is something to enhance.

加 Further, the decorative sheets 50 of the third and fourth embodiments have a heat seal layer 92 separately from the picture part 53 and the shielding part 55. However, by forming the shielding portion 55 from a material that becomes adhesive when heated, the shielding portion 55 can also serve as the heat seal layer 92. The shielding portion 55 also serving as the heat seal layer 92 is made of, for example, a resin having a melting point of about 80 ° C., such as a vinyl chloride / vinyl acetate copolymer.

加 Further, the decorative sheet 50 of the third and fourth embodiments may not have the heat seal layer 92. Even when the pattern portion 53 and the shielding portion 55 on the transfer substrate portion 511 are transferred to the transferred substrate portion 512, usually, the adhesive force between the transferred substrate portion 512 and the shielding portion 55 is reduced by the transfer base. Since the adhesive strength between the material portion 511 and the picture portion 53 is larger, the picture portion 53 and the shielding portion 55 on the transfer base material portion 511 can be removed without the heat seal layer 92. 512 can be transferred.

However, in the decorative sheets 50 of the third and fourth embodiments, as described above, the residue of the pattern portion residue 53a and the shielding portion residue 55a in the transmission portion 57 is suppressed by the heat seal layer 92. I have. In the method of manufacturing the decorative sheet 50 according to the third and fourth embodiments, the pattern portion 53 and the shielding portion 55 on the transfer base portion 511 are transferred to the transfer base portion 512 by the heat seal layer 92. Things are easy. Therefore, the decorative sheet 50 of the third and fourth embodiments preferably has the heat seal layer 92.

In the method of manufacturing the decorative sheet 50 according to the third and fourth embodiments, for example, as shown in FIG. 15A, a pattern 53 is formed on a transfer base 511, and the pattern 53 is formed on the transfer base 511. Was formed with a shielding portion 55. However, in the method of manufacturing the decorative sheet 50 of the present invention, the shielding portion 55 may be formed on the transfer base portion 511, and the pattern portion 53 may be formed on the shielding portion 55.

Next, the difference between the base member 51 of the first and second embodiments and the transfer base member 511 of the third and fourth embodiments will be described.

As described above, the transfer base 511 of the third and fourth embodiments is made of a material harder than the base 51 of the first and second embodiments. More specifically, the base portion 51 of the first and second embodiments is made of a material that softens under a temperature environment when the transmission portion 57 of the decorative sheet 50 is formed, The transfer base portion 511 of the third and fourth embodiments is made of a material that does not soften or has a small degree of softening under the temperature environment. In the formation of the transmitting portion 57 in the first and second embodiments, the mesh member 70 or the pressing member 80 is pressed under a temperature environment in which the base portion 51, the pattern portion 53, and the shielding portion 55 soften. On the other hand, in the formation of the transmissive portion 57 in the third and fourth embodiments, the transfer base portion 511 does not soften or has a small degree of softening, and under a temperature environment in which the picture portion 53 and the shielding portion 55 soften. The mesh member 70 or the pressing member 80 is pressed.

From such a viewpoint, it is preferable that the base portion 51 of the first and second embodiments is made of polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, or the like. Further, the transfer base portion 511 of the third and fourth embodiments is preferably made of polyethylene terephthalate, polyamide, polybutylene terephthalate, polyphenyl sulfide, polyimide or the like.

In addition, the transfer base portion 512 of the third and fourth embodiments can appropriately transfer the pattern portion 53 and the shielding portion 55 on the transfer base portion 511, and is more molded than the transfer base portion 511. It is composed of a material with excellent properties. From such a viewpoint, it is preferable that the transfer-receiving substrate portion 512 of the third and fourth embodiments is made of polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer, polypropylene resin, or the like.

As described above, the method for manufacturing the decorative sheet 50 according to the first to fourth embodiments is simple and low-cost.

Various changes can be made to the above-described embodiment.

For example, in the above-described embodiment, as shown in FIG. 3, the transmissive portion 57 is formed on the entire decorative sheet 50. However, as shown in FIG. 19, the transmissive portion 57 of the decorative sheet 50 may be formed only in a region facing the display surface 41 of the display device 40. By forming the transmissive portion 57 only in a region facing the display surface 41 of the display device 40, it is possible to further reduce the manufacturing cost of the decorative sheet.

The display device 10 according to the above-described embodiment has the panel member 30. However, as shown in FIG. 20, the display device with a decorative sheet 10 of the present invention may not have the panel member 30.

The decorative sheet 50, the decorative sheet-equipped panel 15, the decorative sheet-equipped display device 20, and the panel-equipped display device 10 of the present invention are, for example, interiors of vehicles such as automobiles and railroads, moving bodies such as aircraft, ships, and space ships. Used for members or exterior members. As a specific example, the decorative sheet 50, the display device with a decorative sheet 20, and the display device with a panel 10 of the present invention are used for a center console of an automobile or a door trim. Alternatively, the decorative sheet 50, the display device with a decorative sheet 20, and the display device with a panel 10 of the present invention may be used by being incorporated into an interior or exterior member of a building, an electronic device, furniture, or an electric appliance.

Reference Signs List 10 display device with panel 15 panel with decorative sheet 20 display device with decorative sheet 30 panel member 30a opening 31 base layer 35 design layer 40 display device 41 display surface 50 decorative sheet 51 base material 51a convex portion 511 transfer Base part 512 Transferred base part 53 Picture part 53a Picture part residue 55 Shield part 55a Shield part residue 57 Transmission part 58 Laminate part 581 Transparent protective layer 59 Film member 60 Adhesive layer 70 Mesh member 71 Line part 72 Opening 80 Pressing member 80a Concave portion 80b Convex portion 81 Film base material 82 Adhesive layer 85 Pressed laminate 91 Press plate 92 Heat seal layer

Claims

A step of forming a picture part on the surface of the transparent base part,
A mesh member having a line portion and an opening is pushed from the side on which the pattern portion is formed toward the base portion, and the pattern portion of the mesh member facing the line portion is placed in the base portion. And a step of inserting the picture portion in a region facing the opening of the mesh member into the opening,
A step of separating the mesh member from the base member together with the picture portion in the opening.
A step of forming a picture part on the surface of the transparent base part,
A step of pressing a pressing member having a concave portion from the side on which the pattern portion is formed toward the base portion, and pressing the pattern portion in a region opposed to a region other than the concave portion of the pressing member into the base portion; When,
A step of separating the pressing member from the base member,
Removing the pattern portion not pushed into the substrate portion from the substrate portion.
A step of forming a picture part on the surface of the transparent base part,
After pressing a mesh member having a line portion and an opening from the side on which the picture portion is formed toward the base portion, the mesh member is separated from the base portion, and the wire portion of the mesh member is Removing the picture portion from the facing area.
A step of forming a picture part on the surface of the transparent base part,
After pressing the pressing member having the concave portion and the convex portion from the side where the picture portion is formed toward the base portion, the pressing member is separated from the base portion and faces the convex portion of the pressing member. Removing the pattern portion from the region.
It is a manufacturing method of the decorative sheet according to claim 3 or 4,
A method for manufacturing a decorative sheet, further comprising a step of forming a heat seal layer after the step of forming the picture portion.
It is a manufacturing method of the decorative sheet according to any one of claims 3 to 5,
A method for manufacturing a decorative sheet, further comprising a step of transferring the picture part on the base material part onto another transparent base material part after the step of removing the picture part.
It is a manufacturing method of the decorative sheet according to claim 2 or 4,
The method for manufacturing a decorative sheet, wherein the pressing member has a metal foil in which the concave portion is formed by patterning.
A transparent substrate having a convex portion on the surface, and a pattern portion provided in a region other than the convex portion on the surface of the substrate portion,
The decorative sheet, wherein the convex portion of the base portion is a transmitting portion that transmits light.
It is a decoration sheet according to claim 8,
A decorative sheet comprising a first film member welded from a side of the base portion where the picture portion is provided.
It is a decoration sheet according to claim 8,
A second film member laminated on the side of the base portion where the picture portion is provided,
And a first adhesive layer provided on the base portion side of the second film member.
A transparent base portion, a picture portion provided on the base portion, and a transmission portion that is a non-formation portion of the picture portion,
The decorative sheet, wherein the pattern portion is thicker as it is closer to the transmission portion.
The decorative sheet according to claim 11,
A decorative sheet having a heat seal layer between the base portion and the design portion or on the opposite side of the design portion from the base portion.
A display device having a display surface;
A display device with a decorative sheet, comprising: the decorative sheet according to any one of claims 8 to 12, provided to face the display surface.
A display device having a display surface;
A panel member having an opening,
The decorative sheet according to any one of claims 8 to 12, provided to face the display surface,
The panel member is disposed between the display device and the decorative sheet, such that the display surface is located in the opening when viewed from a normal direction to the display surface. A display device with a panel.