JPH0834105A - Decorative sheet - Google Patents

Abstract

PURPOSE:To obtain a decorative sheet which has a bending property equal to that of a decorative sheet made of a polyvinyl chloride film and does not generate poisonous gas at the time of incineration by layering in sequence a masking solid layer, a printed pattern layer, and an olefin resin layer on a surface of a paper base material through an adhesive layer. CONSTITUTION:A decorative sheet 1 is formed by layering an adhesive layer 3, a masking solid layer 4, a printed pattern layer 5, and an olefin resin sheet 6 on a top face of a paper base material 2 in sequence. That is, the olefin resin sheet 6 having the printed pattern layer 5 and the masking solid layer 4 and the paper base material 2 are layered through the adhesive layer 3. For the olefin resin sheet 6 to be used for the decorative sheet 1, a polypropylene resin sheet having excellent solvent resistance, contamination resistance, abrasion resistance and high heat resistance is preferable. Further, a polypropylene resin sheet which is stretched biaxially so as to fit for bending working such as V-cut working and lapping working is suitable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet which is attached to various kinds of furniture, building interior materials, etc. for the purpose of decoration or surface protection.

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet of this type, (1) a sheet obtained by printing a thin paper by a usual method and providing a coating layer of aminoalkyd resin, urethane resin or the like for surface protection, (2) A sheet made by laminating transparent polyvinyl chloride film after performing ordinary printing on polyvinyl chloride film, (3) After printing on thin paper,
A sheet and the like formed by laminating transparent polyvinyl chloride films are known. However, in the decorative sheet of (1) above, since the strength of the sheet is insufficient,
It was not suitable for curved surface processing such as V-cut processing and lapping processing, and there was a problem that cracking of the sheet or peeling of ink at the corners is likely to occur during processing. Also (2) and
Since all of the decorative sheets in (3) use polyvinyl chloride film, harmful gas such as hydrogen chloride gas is generated during combustion, which may damage the incinerator when disposing of it by incineration. There were problems such as the possibility of polluting the environment.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to perform V-cut processing and lapping processing equivalent to a decorative sheet using a polyvinyl chloride film. It is an object of the present invention to provide a low-cost decorative sheet that has curved surface processability, etc., and does not generate a toxic gas when incinerated, and thus does not cause pollution problems.

[0004]

In order to achieve the above object, the decorative sheet of the present invention comprises a concealing solid layer, a printed pattern layer, an olefinic layer on the surface of a paper-based substrate layer through an adhesive layer. It is characterized in that it is formed by laminating resin layers.

The decorative sheet is preferably characterized in that a gloss adjusting layer is provided on the entire surface of the olefin resin layer, and a pattern layer of matte ink is provided on the surface of the gloss adjusting layer. It is a thing.

[0006]

The makeup sheet of the present invention has a structure in which an olefin resin layer having a printing layer is laminated on the surface of a paper base material layer with an adhesive layer interposed between the paper base material layer and the paper base material layer. The generated gas does not contain toxic hydrogen chloride gas, and also acts to enhance curved surface workability. Further, by providing a gloss adjusting layer and a pattern layer made of a matte ink on the surface of the olefin resin layer, the designability can be improved.

[0007]

EXAMPLES Examples will be described below with reference to the drawings. 1 is a sectional view showing an example of the decorative sheet of the present invention, FIG.
FIG. 3 is a cross-sectional view showing another example of the decorative sheet of the present invention, 1 is a decorative sheet, 2 is a paper-based substrate, 3 is an adhesive layer, 4 is a concealing solid layer, 5 is a printed pattern layer, and 6 is an olefin group. A resin sheet, 7 is a gloss adjusting layer, and 8 is a pattern layer.

As shown in FIG. 1, the constitution of the decorative sheet 1 of the present invention comprises an adhesive layer 3, a concealing solid layer 4, a printed pattern layer 5, and an olefin resin sheet 6 in this order on the upper surface of a paper base material 2. The printed pattern layer 5 and the concealed solid layer 4 are laminated.
The olefin resin sheet 6 provided with the above and the paper base material 2 are laminated and formed with the adhesive layer 3 interposed therebetween.

As the olefin resin sheet 6 used in the decorative sheet 1 of the present invention, a colorless or colored transparent sheet of polyethylene resin, polypropylene resin, polyethylene terephthalate resin or the like is used.
A polypropylene resin-based sheet having excellent stain resistance, abrasion resistance, and high heat resistance is preferable. Furthermore, by stretching the polypropylene resin-based sheet in both vertical and horizontal axes, mechanical properties and thermal properties are improved. A polypropylene resin sheet that is biaxially stretched so as to be suitable for curved surface processing such as V-cut processing and lapping processing is preferable because of its quality. The thickness of the olefin resin sheet 6 is 10 to 50 μm.
It is preferable to

From the viewpoint of adhesiveness, it is advisable to subject the olefin resin layer to a treatment for improving the adhesiveness. For example, the surface of the biaxially oriented polyolefin film is treated by corona discharge treatment on the biaxially oriented polyolefin film. It is desirable that the "wetting index" be 38 dyne / cm ² or more.
By setting the dyne / cm ² or more, the adhesion with the printing ink is improved. Similarly, the plasma treatment may improve the adhesion to the printing ink.

As the material of the paper-based base material 2, ordinary materials such as thin paper, bleached or unbleached kraft paper, and high-quality paper, so-called inter-paper reinforced paper, and synthetic paper mixed with synthetic resin,
Titanium paper, linter paper, paperboard, gypsum board paper, etc. can be used, but usually thin paper with a weight of 30 to 65 g / m ² is preferable, and paper-reinforced paper with strong paper-to-paper strength such as acrylamide or epoxyamide is suitable. is there.

The print layer is composed of a print pattern layer 5 on which an arbitrary pattern such as a wood grain pattern, an abstract pattern, or a stone pattern is formed by printing, a concealed solid layer 4 printed on the entire surface, and the like. The ink forming the print layer is Although it depends on the material and form of the surface protective layer, generally, an ink formed by using a chlorinated polypropylene resin or a polyurethane resin as a vehicle and adding an ordinary pigment or dye as a coloring agent is used.

The adhesive layer 3 for laminating the olefin resin sheet 6 provided with a printing layer and the paper base material 2 is an adhesive made of urethane resin or a polyolefin resin extruded by hot melt. However, a method of laminating by a dry lamination using a urethane adhesive is suitable. The amount of adhesive applied is 5
A urethane resin having a range of 15 g / m ² and having some flexibility in a two-component curing type is preferable. After laminating at a temperature of 40 to 70 ° C., aging in an atmosphere of 35 to 40 ° C. for 48 to 72 hours To achieve sufficient performance.

FIG. 2 is a sectional view showing another example of the decorative sheet 1 of the present invention. In the decorative sheet 1 of the present invention, as shown in FIG. 2, a pattern layer 8 may be further formed on the surface of the gloss adjusting layer 7 with a coloring ink or the like. For example, when the printed pattern layer 5 is printed in a wood grain pattern and the picture layer 8 provided on the surface of the gloss adjusting layer 7 is made into a matte colored conduit pattern, it is possible to impart the design property of the wood grain having a three-dimensional conduit pattern. it can.

The gloss adjusting layer 7 may be colorless transparent, colored transparent, or matte transparent, and is provided to adjust the glossiness of the surface of the decorative sheet. However, it also has a role of surface protection. The gloss adjusting layer 7 is formed by applying a paint using an appropriate vehicle, and the vehicle is one or two of thermosetting resins such as phenol resin, unsaturated polyester resin, epoxy resin and polyurethane resin. The above mixed resins can be used. An appropriate amount of matting agent is usually dispersed in the ink for forming the matte adjusting layer 7 to give a desired glossiness. As the matting agent, mica, silica, alumina, calcium carbonate, diatomaceous earth, silica sand, Shirasu balloon or the like is used. As a method of applying the above ink, a gravure coat,
A method such as roll coating or air knife coating is used.

The ink used for forming the pattern layer 8 is, for example, a black or brown dark color ink made of urethane resin, and the glossiness of the ink used for forming the pattern layer 8 is It is preferable that the matting effect is higher than that of the gloss adjusting layer 7.

In the method for producing the decorative sheet 1 of the present invention, a print layer composed of a print pattern layer 5 and a concealing solid layer 4 in that order is provided on the back surface of the olefin resin sheet 6 constituting the surface protective layer by gravure printing. Next, paper-based base material 2 reinforced between paper
A two-component curable adhesive is applied to the surface of the sheet by gravure coating, dried, and then a printed layer of the olefin resin sheet is overlaid on the surface of the adhesive and dry laminated to complete the decorative sheet 1.

The decorative sheet in which the decorative sheet 1 of the present invention is laminated on a wood-based substrate such as plywood or particle board by using an emulsion type adhesive has a surface having abrasion resistance, solvent resistance, stain resistance and the like. Since it has excellent physical properties, it can be used for surface makeup applications such as furniture and kitchen cabinets, and can also be used for bending processing by forming V-cut grooves on a wood-based substrate. Further, the decorative sheet 1 of the present invention can also be used for wrapping deformed wood and deformed shaped products.

Example 1 A pattern printing layer and a concealed solid layer were printed on a biaxially oriented polypropylene film having a thickness of 20 μm and subjected to corona treatment on both sides with a chlorinated polypropylene resin as a vehicle using a gravure rotary press. Then, a thermal adhesive composed of a two-component curing type urethane resin was applied on the surface of the thin paper which was weighed at 30 g / m ² and reinforced with paper by a gravure roll coater so that the solid content was 6 g / m ² , and the temperature was 40 to 90 ° C. After being dried by blowing hot air, the surface of the printed biaxially stretched polypropylene film and the concealing solid layer surface are overlapped and roll-laminated between nip rolls heated to 40 to 70 ° C. to obtain solvent resistance and stain resistance on the surface. It was possible to obtain a decorative sheet having excellent physical properties such as V cut and lapping.

Example 2 On the corona-treated surface of the biaxially oriented polypropylene film, which is the surface of the decorative sheet obtained in Example 1, a gloss adjusting layer was colored with a urethane type gloss adjusting ink, and the gloss adjusting layer was colored. A wood grain conduit pattern was printed with a matt urethane ink on a gravure rotary press to obtain a decorative sheet of high design, which has excellent post-processability such as V-cut and wrapping.

[0021]

The cosmetic sheet of the present invention has a constitution in which a biaxially oriented polypropylene film having a printing layer on the surface of a paper-based base material layer is laminated by dry lamination, so that a conventional vinyl chloride film is used as the base material. Unlike a decorative sheet, which does not generate toxic gas such as hydrogen chloride when it is disposed of by incineration or the like, there is no fear of polluting the environment.
Further, the problem that the surface is soiled by the bleeding of the plasticizer is eliminated, and a decorative sheet having excellent stain resistance and solvent resistance and excellent post-processability such as V-cutting and lapping can be obtained.

Further, the biaxially oriented polypropylene film laminated on the surface of the decorative sheet has sufficient surface properties even if it is a thin film, and since the base material layer is made of paper-based thin paper, the decorative sheet can be obtained at low cost.

By applying the printed pattern layer to the biaxially oriented polypropylene film surface, the printed pattern can be made clear and beautiful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a decorative sheet of the present invention.

FIG. 2 is a cross-sectional view showing another example of the decorative sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative sheet 2 Paper-based base material 3 Adhesive layer 4 Concealed solid layer 5 Printed pattern layer 6 Olefin resin sheet 7 Gloss adjustment layer 8 Design layer

Claims (2)

[Claims] 1. A decorative sheet comprising a paper base material layer, a cover solid layer, a printed pattern layer and an olefin resin layer, which are laminated in this order on the surface of an adhesive layer. 2. The decorative sheet according to claim 1, wherein a gloss adjusting layer is provided on the entire surface of the olefin resin layer, and a pattern layer of matte ink is provided on the surface of the gloss adjusting layer.