JP2002120336A - Decorative sheet for furniture and decorative top plate using the sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel decorative sheet which is especially suitable for the top plate of a piece of furniture such as a desk and a table and a decorative top plate using the sheet. SOLUTION: In the decorative sheet in which a colored surface layer sheet 2 of polyethylene terephthalate is laminated on a backing sheet 1 of polyolefin resin with the lower surface embossed, and the surface of the sheet 2 is coated with a UV coat 3, the thickness of the surface layer is 25-50 μm, the thickness of the UV coat is 6-20 μm, and the sum of the thickness of the surface layer sheet and the thickness of the UV coat is 10% or below of the thickness of the backing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet for furniture and a decorative top plate using the same, and more particularly, to a decorative sheet for furniture such as a desk or a table. The present invention relates to a decorative sheet and a decorative top plate on which the decorative sheet is attached.

[0002]

2. Description of the Related Art The surface of a top plate of furniture such as a desk and a table is made of a thermosetting synthetic resin in which a melamine decorative layer is adhered to a surface of a core material made of a phenol resin layer for improving and protecting aesthetic appearance. (For example, Japanese Utility Model Publication No. 39-32870 and Japanese Utility Model Publication No. 57-17254).
No. 1). Note that a steel plate or a wooden plate is used as a base material of the top plate.

[0003] The above-mentioned melamine veneer is the most common, but PVC veneer, dap veneer and the like are also provided. However, when these decorative boards are incinerated, there are problems such as environmental problems at the time of combustion and difficulty in separation in terms of recycling.

In order to solve these problems, a decorative sheet in which a top coat such as a UV coat or an abrasion-resistant urethane coat (containing a silicone filler) is applied on a base of a general-purpose thermoplastic resin such as polypropylene (PP). Has also been provided. However, since PP is soft, a hard coat is applied to the surface to improve the scratch resistance and abrasion resistance, but the surface hardness, particularly the indentation hardness such as pencil hardness, does not appear. That is, when the surface of the decorative sheet is strongly pressed with the lead of the pencil, the underlying PP base sinks and cracks occur in the top coat on the surface.

[0005]

SUMMARY OF THE INVENTION In view of the above situation, the present invention is to provide a decorative sheet particularly suitable for use by bonding to a top plate of furniture such as a desk or a table. In view of the above, it is an object of the present invention to provide a novel decorative sheet for furniture having pencil hardness and also having recyclability, and to provide a decorative top plate using the decorative sheet.

[0006]

According to a first aspect of the present invention, a surface layer made of polyethylene terephthalate, which has been subjected to a coloring treatment, is provided on a base sheet of a polyolefin resin having an embossed lower surface. A decorative sheet obtained by laminating sheets and applying UV coating on the surface thereof, wherein the thickness of the surface layer sheet is 25 to 50 μm, the thickness of the UV coat is 6 to 20 μm, and the thickness of the surface layer sheet and the thickness of the UV coat. A decorative sheet for furniture having a sum of 10% or less of the thickness of the base sheet was formed.

Here, if the thickness of the surface layer sheet is less than 25 μm, the surface pencil hardness is not 2H (it has resistance to the pencil lead of 2H), and if the thickness is more than 50 μm, the recycling efficiency as a polyolefin resin is reduced. Problems arise.
If the thickness of the UV coat is less than 6 μm, its original performance cannot be obtained, and if it is more than 20 μm, cracks occur during post-form. When the sum of the thicknesses of the surface sheet and the UV coat exceeds 10% of the thickness of the base sheet, a problem occurs in terms of recycling as a polyolefin resin.

It is preferable that the surface layer sheet subjected to the coloring treatment is one in which an ink layer is formed on the lower surface side of the sheet or one in which a pigment is mixed in the sheet resin in order to enhance the cosmetic property.

If the base sheet is a polypropylene resin sheet having an embossed lower surface and a thickness of 700 to 900 μm, it is advantageous in terms of cost, and is suitable for forming a decorative sheet as a whole in a post form. It is possible to provide a moderate softness with good softness and good deaeration during bonding.

Alternatively, the base sheet is formed by laminating a hard sheet made of a hard polyolefin resin or an ionomer resin on a base sheet made of a polypropylene resin having an embossed lower surface. If the thickness of the hard sheet is 550 to 650 μm and the thickness of the hard sheet is 100 to 200 μm, the decorative sheet as a whole can have a moderate softness capable of forming a post foam and a moderate hardness with good degassing during bonding. This is more preferable because it is possible and a harder pencil hardness can be obtained.

A second invention uses the decorative sheet for furniture of the first invention, and the decorative sheet is attached to the upper surface of a steel or wooden top plate base material or the upper surface and the front and rear surfaces. A decorative top plate was constructed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 shows a first embodiment of the decorative sheet of the present invention, FIG. 2 shows a modified example of the first embodiment, FIG. 3 shows a second embodiment of the decorative sheet of the present invention, and FIG. 4 shows a modified example of the second embodiment. In the figure, reference numeral 1 denotes a base sheet, 2 denotes a surface layer sheet, and 3 denotes a UV coat.

A decorative sheet according to the present invention is a base sheet 1 of a polyolefin resin having an embossed lower surface.
A surface layer sheet 2 made of polyethylene terephthalate (PET) which has been subjected to a coloring treatment is laminated on the
The coat 3 is applied, and the thickness of the surface sheet 2 is further increased to 25 to
The thickness of the UV coat 3 is set to 6 to 20 μm, and the sum of the thicknesses of the surface sheet 2 and the UV coat 3 is set to be 10% or less of the thickness of the base sheet 1. Since the UV coat 3 constitutes the outermost surface of the decorative sheet, the UV coat 3 has desired characteristics such as scratch resistance, abrasion resistance, crack resistance during post-form, and appearance. The sheet thickness of the surface layer sheet 2 is set so as to have a desired surface pencil hardness. Further, by setting the sum of the thicknesses of the surface layer sheet 2 and the UV coat 3 to be 10% or less of the thickness of the base sheet 1, impurities are reduced when the decorative sheet according to the present invention is recycled as a polyolefin resin. The amount of resin falls within the allowable range.

First, a decorative sheet A1 according to a first embodiment of the present invention will be described with reference to FIG. The base sheet 1 of the decorative sheet A1 is a polypropylene resin (PP) having a flexural modulus of 0.7 to 1.5 GPa as a polyolefin resin.
The thickness is 700 to 900 μm, and a large number of recesses 4 are formed by embossing the lower surface side. The base sheet 1 is subjected to corona treatment on both front and back surfaces to enhance adhesiveness, and primers 5 and 6 are applied. Here, the embossing on the lower surface side is provided for facilitating degassing when adhering to a top plate base material described later, and for further enhancing the adhesiveness. The lower surface of the base sheet 1 thus treated has a surface tension of 4
0 dyn / cm or more.

The surface sheet 2 of the decorative sheet A1 is
Tensile strength 20-30MPa, elongation 110-135%
Of a biaxially stretched polyethylene terephthalate sheet having a thickness of 25 to 50 μm. And, the surface layer sheet 2 made of polyethylene terephthalate
In addition, both the front and back surfaces are subjected to corona treatment in order to enhance the adhesiveness, and primers 7 and 8 are applied. Then, on the lower surface side of the primer 7 of the surface layer sheet 2, an ink layer 9 on which coloring, a pattern, and a pattern are formed as a coloring treatment is formed, and a UV coating 3 is formed on the upper surface side of the primer 8.
Is applied. The UV coat 3 is a urethane acrylate UV coat having a 60 ° gloss value of 10 to 20 in which silica or acrylic powder is dispersed as a matting material. The thickness of the UV coat 3 is 6 to 20 μm.

The decorative sheet A1 is manufactured by integrating the base sheet 1 and the surface sheet 2 which has been subjected to a coloring treatment and has the UV coat 3 formed thereon with an adhesive 10.

The following Table 1 shows that the thickness of the UV coat 3 is 10 μm.
m, and the thickness of the surface layer sheet 2 is 12, 23, 35,
The test results of the surface pencil hardnesses HB, H, and 2H are shown for the specimens changed to 50 and 100 μm. From this result, it can be seen that the thickness of the surface layer sheet 2 from which the surface pencil hardness of 2H is obtained is 25 μm or more. However, if the thickness of the surface layer sheet 2 is more than 50 μm, a problem occurs in terms of recycling as a PP sheet, and thus there is an upper limit. "X" in the table indicates that the indentation hardness by pencil hardness is not sufficient, "△" indicates that it is slightly insufficient, "○"
Indicates that it is sufficient.

[0018]

[Table 1]

The decorative sheet A2 shown in FIG. 2 is a modification of the first embodiment. Here, only the configuration different from the decorative sheet A1 will be described. In the decorative sheet A2, a coloring process is performed by mixing a pigment into a sheet resin (PET) forming the surface layer sheet 2 without forming the ink layer 9. The front and back surfaces of the colored surface sheet 2 are subjected to the Rona treatment, and the primers 7 and 8 are applied. Other configurations are the same as those described above.

Next, a decorative sheet B1 according to a second embodiment of the present invention will be described with reference to FIG. The base sheet 1 of the decorative sheet B1 is obtained by laminating a hard sheet 12 made of a hard polyolefin resin or an ionomer resin on a base sheet 11 made of a polypropylene resin having an embossed lower surface. The thickness of the sheet 11 is set to 550 to 650 μm, and the thickness of the hard sheet 12 is set to 100 to 200 μm.

The polypropylene resin forming the base sheet 11 has a flexural modulus of 0.7 to 1.5 GPa.
Is formed. And the base sheet 11
In order to improve the adhesiveness, both the front and back surfaces are subjected to a corona treatment, and primers 13 and 14 are applied. The rigid polyolefin resin or the ionomer resin forming the rigid sheet 12 has a flexural modulus of 1.7 to 1.7.
2.0 GPa. Similarly, the rigid sheet 1
In No. 2, primers 15 and 16 are applied while corona treatment is performed on both the front and back surfaces to enhance the adhesiveness.
Here, the ionomer resin is a resin having the highest hardness, rigidity, and abrasion resistance among the polyolefin resins, and has a tensile strength of 27.5 to 30 MPa and an elongation of 320 to 400.
% And a flexural modulus of 0.30 to 0.40 GPa. The base sheet 11 and the hard sheet 12 are bonded to each other with an adhesive 17. The ink layer 9 and the surface sheet 2, which are laminated on the upper surface side of the base sheet 1,
The UV coat 3 is the same as the case of the decorative sheet A1 of the first embodiment, and therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.

The decorative sheet B2 shown in FIG.
This is a modification of the second embodiment. This decorative sheet B
2 has a structure in which the colored surface sheet 2 of the decorative sheet A2 of FIG. 2 and the UV coat 3 are laminated on the base sheet 1 of the decorative sheet B1 of FIG. Other configurations are the same as those described above.

Next, the decorative top plate 21 produced using the decorative sheet 20 of the present invention will be briefly described. FIG. 5 is a perspective view of a furniture (partitioning / partitioning partition) using the decorative top plate 21 according to the present invention, and a column (shown in FIG. 5) positioned between a plurality of partition panels 22 erected in an L shape in plan view. ) Is detachably attached to one side of
24, one of the top panels 21 is attached, and the partition panel 22
The other decorative top plate 21 is attached to a long bracket 25 fixed to one side of the above.

6 and 7 show cross sections of details of the decorative top plate 21, FIG. 6 is a sectional view taken along line XX of FIG. 5, and FIG.
It is Y sectional drawing. The decorative top plate 21 includes a top plate base 26 made of a thin steel plate, and the lower surface of the top plate base 26 is fixed to the reinforcing frames 27 and 28 by spot welding. Synthetic resin edge members 31, 3 are inserted into locking grooves 29 or locking holes 30 provided on the side surfaces of the reinforcing frames 27, 28.
2 is inserted and locked. Thereby, the decorative sheet 2
Since the end surface of the decorative sheet 20 is covered with the edge members 31 and 32, the decorative sheet 20 can be prevented from peeling during use.

FIG. 8 shows that the front and rear edges of the
The decorative top plate 21 has a curved edge portion 34 that is smoothly curved downward, and the decorative sheet 20 is attached while post-forming the decorative sheet 20 over the upper surface and the front and rear surfaces of the top plate base 33. Even if the decorative sheet 20 of the present invention is bent along the curved edges 34 of the front and rear edges of the top plate base 33, the UV coat 3 does not crack and can be adhered well.

In the present embodiment, the top plate substrates 26 and 33 for attaching the decorative sheet 20 are made of steel, but may be made of wood, and may be attached with various adhesives or double-sided tape. If you can do it, you will not be caught by the material.
In addition, the decorative sheet according to the present invention can be easily applied not only to a decorative top plate of a desk or a table, but also to a plate member constituting a surface of various furniture such as a partition panel or a cabinet.

[0027]

As described above, the decorative sheet for furniture according to the first aspect of the present invention is a surface layer made of polyethylene terephthalate, which is colored on a base sheet of a polyolefin resin having an embossed lower surface. A decorative sheet in which sheets are laminated and the surface thereof is coated with UV, wherein the surface layer sheet has a thickness of 25 to 50 μm,
The thickness of the coat is 6 to 20 μm, and the sum of the thickness of the surface layer sheet and the UV coat is 10% of the thickness of the base sheet.
Because of the following, the pencil hardness is ensured and the recyclability is also provided, and further, degassing becomes easy when bonding to a base material such as a top plate.

According to the second aspect, the appearance is excellent.

According to the third aspect, since a general-purpose polypropylene resin is used, it can be manufactured at low cost.

According to the fourth aspect, it is possible to ensure recyclability while securing a higher pencil hardness.

According to the fifth aspect, it is possible to provide a decorative top plate having recyclability while ensuring pencil hardness.

[Brief description of the drawings]

FIG. 1 is a simplified sectional view showing a first embodiment of a decorative sheet of the present invention.

FIG. 2 is a simplified sectional view showing a modification of the decorative sheet of the first embodiment.

FIG. 3 is a simplified sectional view showing a second embodiment of the decorative sheet of the present invention.

FIG. 4 is a simplified sectional view showing a modification of the decorative sheet according to the second embodiment.

FIG. 5 is a perspective view showing an example of furniture using the decorative top plate of the present invention.

FIG. 6 is an enlarged sectional view taken along line XX of FIG. 5;

FIG. 7 is an enlarged sectional view taken on line YY of FIG. 5;

FIG. 8 is a sectional view of a main part of a post-form type decorative top plate.

[Explanation of symbols]

 A1, A2, B1, B2 Decorative sheet 1 Base sheet 2 Surface sheet 3 UV coat 4 Depression 5,6 Primer 7,8 Primer 9 Ink layer 10 Adhesive 11 Base sheet 12 Hard sheet 13,14 Primer 15,16 Primer 17 Adhesion Agent 20 Decorative sheet 21 Decorative top plate 22 Partition panel 23, 24 Leg 25 Bracket 26, 33 Top plate base material 27, 28 Reinforcement frame 29 Lock groove 30 Lock hole 31, 32 Edge member 34 Curved edge

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) B32B 27/36 B32B 27/36 33/00 33/00 F term (reference) 2B250 AA13 BA03 CA11 3B053 PA05 PB01 PB05 PC02 QA05 QA06 QB05 QC03 QC09 4F100 AA20 AB03E AK03A AK03D AK07A AK25 AK42B AK51 AK70D AP00E BA03 BA04 BA05 BA10A BA10C BA10E BA13 BA25 CA13B CC02C DE01 EJ39A EJ65 GBJ YB12BJJB12B81B81B81Y

Claims (5)

[Claims] 1. A decorative sheet in which a surface layer sheet made of polyethylene terephthalate having been subjected to a coloring treatment is laminated on a base sheet of a polyolefin resin having an embossed lower surface side, and a UV coating is applied to the surface thereof. The thickness of the surface layer sheet is 25 to 50 μm, the thickness of the UV coat is 6 to 20 μm, and the sum of the thickness of the surface layer sheet and the UV coat is 10% or less of the thickness of the base sheet. Decorative sheet for furniture. 2. The furniture decorative sheet according to claim 1, wherein the surface sheet subjected to the coloring treatment is a sheet having an ink layer formed on the lower surface of the sheet or a sheet resin mixed with a pigment. 3. The decorative sheet for furniture according to claim 1, wherein the base sheet is a sheet made of a polypropylene resin having a thickness of 700 to 900 μm and embossed on a lower surface side. 4. The base sheet according to claim 1, wherein the base sheet is formed by laminating a hard sheet made of a hard polyolefin resin or an ionomer resin on a base sheet made of a polypropylene resin having an embossed lower surface. The decorative sheet for furniture according to claim 1 or 2, wherein the thickness of the hard sheet is 550 to 650 µm, and the thickness of the hard sheet is 100 to 200 µm. 5. The furniture decorative sheet according to claim 1, wherein the decorative sheet is a steel or wooden top plate base,
Alternatively, a decorative top plate, which is attached over the upper surface and the front and rear surfaces.