JPH10119498A - Decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a decorative sheet with extremely fine designability by an intact display of the grain of natural wood on the surface. SOLUTION: A hardcoat layer 2 consisting of completely cured UV ray curing resin is laminated on the surface of a sheet base material 1 of natural wood, and an adhesive layer 3 is laminated on the rear surface of the sheet-like base material 1. The adhesive layer 3 can be formed by the application of a thermosensitive adhesive, a pressure sensitive adhesive, or a pressure sensitive adhesive agent. In this instance, between the sheet-like base material 1 and the adhesive layer 3, an incombustible sheet body 4 can be laminated via an adhesive layer 6, one in such a layer constitution has an excellent incombustibility and flatness. Furthermore, on the surface of the hardcoat layer 2, a protection film having a releasing property can be laminated in a manner facing the hardcoat layer 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet excellent in design in which the grain of a natural tree is expressed as it is on the surface.

[0002]

2. Description of the Related Art A natural wood sheet has been known as a product obtained by processing a natural tree into a sheet having a certain thickness. However, such a natural wood sheet itself is weak against bending force. However, there is a disadvantage that cracks or cracks easily occur. Further, the natural wood sheet is easily curled and has a problem in terms of flatness. Further, since the material is wood, it is weak against water and has a problem in water resistance. On the other hand, for interior decoration, decorative sheets in which a natural wood grain pattern is printed on a plastic sheet base material have been widely used to date, but depending on the printing, sufficient grain depth (texture) can be obtained.
Was difficult to express.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the problem of a decorative sheet in which a wood grain pattern is expressed by conventional printing, and the natural wood grain is expressed on the surface as it is, so that the design is extremely designed. It is an object to provide an excellent decorative sheet.

[0004]

The decorative sheet of the present invention comprises a sheet-like substrate made of natural wood and a hard coat layer obtained by completely curing an ultraviolet curable resin laminated on the surface of the sheet-like substrate. An adhesive layer is laminated on the back surface of the substrate. The present invention is also characterized in that, in the decorative sheet having the above-described layer configuration, a nonflammable sheet body is laminated between the sheet-like base material and the adhesive layer. Furthermore, the present invention provides, in the decorative sheet having the above-described layer configuration, a protective film having releasability on the surface of the hard coat layer,
It is also characterized by being laminated such that the release surface side faces the hard coat layer.

First, the layer structure of the decorative sheet of the present invention is shown in the drawings to explain the present invention. FIG. 1 is a diagram showing the layer structure of the decorative sheet of the present invention, and FIG. 2 shows the non-combustibility between the sheet-like base material 1 and the adhesive layer 3 of the decorative sheet of FIG. It is a figure which shows the preferable layer structure of the decorative sheet of this invention by which the sheet body 4 which has it was laminated | stacked. The sheet-like base material 1 in the decorative sheet of the present invention is a sheet-like body obtained by processing natural wood to a certain thickness, and beautiful natural wood grain is exposed on its surface. Can be used as is. The thickness of the sheet-like base material 1 is generally about 0.2 mm to 2 mm, preferably in the range of 0.25 to 1.5 mm.

Further, the hard coat layer 2 in the decorative sheet of the present invention may be formed by completely curing an ultraviolet-curable resin paint by irradiating ultraviolet rays, and the thickness thereof is not particularly limited. Absent. The hard coat layer 2 according to the present invention can be formed using a transfer film provided with a layer made of a non-adhesive, semi-cured, ultraviolet-curable resin paint. The layer configuration of the transfer film suitable for forming the layer 2 will be described. As such a transfer film, for example, a film described in JP-A-7-125496 is preferable. In this transfer film, as shown in the laminate on the upper side of FIG. On the back surface of a protective film 5 having adhesiveness and releasability, an overcoat layer 2 ″ made of a non-adhesive and semi-cured UV-curable resin paint, and an UV-curable resin paint of the overcoat layer when completely cured. And an undercoat layer 2 ′ made of a non-adhesive, semi-cured UV-curable resin paint having a hardness (pencil hardness 2H to 4H) lower than the hardness (pencil hardness 5H to 6H) at the time of complete curing. And the total laminated thickness of the overcoat layer 2 ″ and the undercoat layer 2 ′ is 100 μm.
m to 600 μm. As the protective film 5 having such transparency and releasability, various commercially available plastic transparent films can be used.
Those having a range of 0 to 350 μm are generally used. The plastic transparent film is preferably made of polyester, polyethylene, polypropylene, or polycarbonate, but may be an acrylic resin film. The surface of the protective film 5 may be smooth or uneven, and the surface of the hard coat layer 2 may be mirror-finished or mat-finished by the protective film 5 having such a surface state. It can also be.

Various commercially available UV-curable resin coatings can be used for forming the hard coat layer 2 in the present invention. Resins may be used as coating film forming components. When transferring the upper coating layer 2 ″ and the undercoat layer 2 ′ on the transfer film to the surface of the sheet-like substrate 1, an ultraviolet-curable resin paint is applied to the surface of the sheet-like substrate 1, and the transfer is performed. The protective film 5 may be peeled off after the undercoat layer 2 'of the film is laminated facing each other, and the resin is completely cured by irradiating ultraviolet rays. In the above, "non-adhesive and semi-cured state" means that the paint layer is in a gelled state,
This refers to a state in which the paint is cured to such an extent that the paint does not stick to the finger even when the surface is touched with a finger. Such a state is about 1/3 to 2/2 of the amount of ultraviolet irradiation necessary for completely curing the paint layer.
It can be obtained by irradiating ultraviolet light with three quantities. The irradiation amount can be easily controlled by the irradiation time. The ultraviolet irradiator used for ultraviolet irradiation is not particularly limited, and various commercially available ultraviolet irradiators can be used.

On the other hand, the type of the adhesive layer 3 provided on the back surface of the sheet-like substrate 1 is not particularly limited, and even if the layer 3 is coated with a heat-sensitive adhesive, It may be a layer coated with a pressure-sensitive adhesive or a layer coated with a pressure-sensitive adhesive. The layer 3 having such an adhesive property is generally provided by coating such as a roll coat, but a heat-sensitive adhesive film, a pressure-sensitive adhesive film, or an adhesive film is provided on the back surface of the sheet-like substrate 1. It may be provided by bonding. In the present invention, by covering the surface of the layer 3 having adhesiveness,
A protective sheet having releasability may be laminated.

In the decorative sheet of the present invention having the layer structure illustrated in FIG. 2, a sheet having non-combustibility is provided between the sheet-like base material 1 and the adhesive layer 3 via the adhesive layer 6. The body 4 is laminated, and as the sheet body 4 having such non-combustibility, various commercially available non-combustible sheets, for example, woven fabric of glass fiber and non-combustible paper can be used. In the present invention, a sheet material such as natural wood, woven fabric, or nonwoven fabric is used as a nonflammable sheet body 4 as a nonflammable agent (fireproof / fireproof material)
A non-combustible material, for example, a commercially available liquid ceramic LC (trade name, manufactured by Comics Co., Ltd.) that has been made into an aqueous solution and applied to the sheet material can also be used. The non-combustible (fire-resistant coated) sheet material exhibits particularly excellent fire protection and fire resistance. In the present invention, since such a sheet body 4 has a layer structure laminated on the back surface of the sheet-like base material 1, the non-combustibility of the decorative sheet is enhanced, and at the same time, the curl of the sheet-like base material 1 is prevented. Thus, the surface strength is improved, and the suitability for sticking to a curved adherend surface is enhanced. The adhesive layer 6 in FIG. 2 is formed by applying a commercially available adhesive to the back surface of the sheet-like substrate 1 and drying (curing). For example, an adhesive formed using a water-based adhesive is used. No.

As can be understood from FIGS. 1 and 2, the decorative sheet of the present invention has a structure in which a sheet-like substrate 1 made of natural wood is covered on both sides with a hard coat layer 2 and an adhesive layer 3. It is excellent in water resistance because it is
It can be easily cut with scissors according to the shape of the adherend, and is a product with very good workability. The decorative sheet in which the thickness of the sheet-shaped substrate 1 is about 0.2 to 0.4 mm is particularly suitable for sticking to a curved adherend surface.

Next, a method for producing and using the decorative sheet of the present invention will be described. FIGS. 3 (a) to 3 (e)
FIG. 3 (f) is a view illustrating a manufacturing process of the decorative sheet of the present invention having the layer configuration shown in FIG. 2; It is a figure which shows the state at the time of sticking on a surface. First, after a transfer film having the above-described layer structure and located on the upper side of FIG. 3A is prepared, an ultraviolet-curable resin coating layer 2 ′ ″ is provided on the surface of a sheet-like substrate 1 made of natural wood ( 3 (a), this layer 2 '''and the undercoat layer 2' of the transfer film are laminated so as to face each other, and the overcoat layer 2 'is placed on the protective film 5 having transparency and releasability. '', The undercoat layer 2 'and the ultraviolet-curable resin coating layer 2''' are irradiated with ultraviolet rays until they are completely cured (FIG. 3).
(See (b)), and obtain a laminate in which the hard coat layer 2 and the protective film 5 are sequentially laminated on the surface of the sheet-like substrate 1 (see FIG. 3C). Then, an adhesive 6 ′ is applied to the back side of the sheet-like substrate 1 in the thus obtained laminate, and the non-combustible sheet 4 is laminated (see FIG. 3 (d)). I do. Finally, a heat-sensitive adhesive, a pressure-sensitive adhesive, or the like is applied to the surface of the sheet body 4 and dried to provide the adhesive layer 3, whereby the decorative layer of the present invention having the layer configuration shown in FIG. A sheet is obtained. When such a decorative sheet is attached to the surface of the adherend 7, the adhesive layer 3 is opposed to the surface of the adherend 7 as shown in FIG. After placing the decorative sheet, heat and pressure are applied from the protective film 5 side, and finally the protective film 5 is peeled off. As described above, when the decorative sheet of the present invention is used, a wood grain design can be provided on the surface of the adherend 7 by a relatively simple method.

[0012]

【Example】

A: Production Example of Transfer Film (Laminated Film Located Above FIG. 3 (a)) As a transfer film having transparency and mold release properties, a transparent film made of polyester having a smooth surface and a thickness of about 350 μm (Toray Lille Miller) : Product name: Toray Industries, Inc., and sandblasting method (particle size 18) on one side of the transparent film.
0 mesh) to give a roughened surface with fine irregularities.
Then, as an overcoat layer on the processed surface of the transparent film, a non-adhesive, semi-cured, ultraviolet-curable resin paint (hard coat 480UV: hard coat 480UV: trade name: sales agency Saran International Co., Ltd .: manufacturer large) Nippon Ink and Chemicals, Inc .: A film-forming component was an acrylic resin) having a thickness of 30 μm. This coating layer is non-adhesive
The semi-cured state is an ultraviolet irradiator (Saran UV hand device:
(Product name: Saran International)
It was obtained by irradiating UV rays for about 20 seconds from above at a distance of cm. Next, as an undercoat layer on the above-mentioned overcoat layer, a non-adhesive, semi-cured UV-curable resin paint (undercoat 260UV: brand name: sales agency Saran International Co., Ltd .: manufacturer large) having a hardness of 2H when completely cured Nippon Ink and Chemicals, Inc .: A film-forming component was a polyester resin) having a thickness of 70 μm. The non-adhesive, semi-cured state of the paint layer was obtained by irradiating ultraviolet rays from above about 30 cm away from above with an ultraviolet irradiator for about 30 seconds.
As described above, the total thickness of the overcoat layer and the undercoat layer is about 1
00 μm transfer film (Saran UV sheet: trade name:
Sales agency Saran International Co., Ltd .: Manufacturer Miyasaka Furniture Co., Ltd.).

B: Production Example of the Decorative Sheet of the Present Invention Constituting the Layer of FIG. 3 (e) After applying a UV-curable resin paint to the surface of a commercially available natural wood sheet (0.25 mm thick) (FIG. 3) (See the sheet located on the lower side of (a))), the undercoat layers of the transfer film obtained in the above A are laminated so as to face each other, and from the base film side having transparency and release properties, FIG. 3 shows that a hard coat layer and a protective film obtained by completely curing an ultraviolet curable resin are laminated on the surface of a natural wood sheet by irradiating ultraviolet rays until both the top coat layer and the undercoat layer are completely cured.
A laminate of (c) was obtained. Thereafter, an aqueous adhesive (Bond: trade name: manufactured by Konishi Co., Ltd.) is applied to the back surface of the natural wood sheet, and a commercially available glass fiber fabric is laminated as a non-combustible sheet body on the applied surface, and dried. Was done. Finally, a heat-sensitive adhesive film (Diamid film: trade name: manufactured by Daicel Chemical Industries, Ltd.) is heat-pressed on the surface of the glass fiber fabric, and the decorative sheet having the layer structure of FIG. I got

[0014] The decorative sheet of the present invention obtained in the above B is cut to the size of the wall surface of the room, and the heat-sensitive adhesive layer is positioned so that the surface of the heat-sensitive adhesive layer faces the wall surface. The protective film was heated from above, and finally the protective film was peeled off. Thus, by attaching the decorative sheet of the present invention to the wall surface, a beautiful wood grain design could be applied to the wall surface.

[0015]

According to the decorative sheet of the present invention, the surface of a sheet-like substrate made of natural wood is covered with a hard coat layer,
And, since it has a layer configuration in which the back surface is covered by a layer having adhesiveness, it has excellent water resistance, and when attached to the surface of an adherend having a curved surface, it can be easily removed from natural wood. The sheet-like base material does not crack or tear. Further, the decorative sheet of the present invention has a deep and excellent texture as compared with a conventional product subjected to grain printing, and is suitable for producing a very high-grade product. By using the decorative sheet, the surface of various adherends can be easily
A wood grain pattern of a natural tree can be expressed. In addition, the decorative sheet of the present invention is hardly scratched because the surface of the sheet-like substrate made of natural wood is covered with the hard coat layer. In the case of a layer configuration in which sheets are stacked, flatness is good,
Curling is prevented from occurring, and very excellent nonflammability is exhibited.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a layer configuration of a decorative sheet of the present invention.

FIG. 2 is a view showing a preferred layer configuration of a decorative sheet in which a nonflammable sheet body 4 is laminated between a sheet-like base material 1 and an adhesive layer 3;

3 (a) to 3 (e) are diagrams showing a manufacturing process of the decorative sheet of the present invention having the layer configuration of FIG. 2, and FIG. 3 (f) is a decorative sheet having the layer configuration of (e). FIG. 2 is a diagram showing a state in which is adhered to the surface of an adherend (decorative body) 7.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-shaped base material 2 Hard coat layer 2 'Non-adhesive / semi-cured undercoat layer 2 "Non-adhesive / semi-cured top coat layer 2'" UV-curable resin paint layer 3 Adhesive layer 4 Non-flammable Sheet body 5 with protective properties 6 protective film 6 adhesive layer 7 adherend (decorative body)

Claims (3)

[Claims] 1. A hard coat layer 2 obtained by completely curing an ultraviolet curable resin is laminated on the surface of a sheet-like substrate 1 made of natural wood, and a back surface of the sheet-like substrate 1 is
A decorative sheet, wherein an adhesive layer 3 is laminated. 2. The decorative sheet according to claim 1, wherein a non-combustible sheet body is laminated between the sheet-shaped base material and the adhesive layer. 3. A protective film 5 having releasability is laminated on the surface of the hard coat layer 2 so that the release surface side faces the hard coat layer 2. The decorative sheet according to claim 1 or 2.