JP2990987B2 - Decorative sheet - Google Patents

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 has been subjected to printing, embossing, wiping, etc., and is bonded to the surface of a wooden board, an inorganic board, a metal plate or the like with an adhesive to form a decorative sheet. The present invention relates to a decorative sheet to be used.

[0002]

2. Description of the Related Art Conventionally, a vinyl chloride resin sheet has been most commonly used as a decorative sheet used for the above-mentioned applications. However, vinyl chloride resin is also said to cause chlorine gas generation, acid rain, and dioxin generation during incineration, and a decorative sheet that does not use a vinyl chloride resin sheet is being demanded from the viewpoint of environmental issues. However, in the case of resin sheets other than vinyl chloride resin, the balance of the appropriate flexibility, embossability, abrasion resistance, surface hardness, chemical resistance, stain resistance, weather resistance, etc. of the vinyl chloride resin sheet required especially in the field of building materials Nothing satisfies the good properties.

[0003] In the field of packaging materials, a method of melt-extruding a resin having similar properties to vinyl chloride resin is already known as a means for solving these problems in using vinyl chloride resin. A method of obtaining a decorative sheet by melt-extruding an olefin-based resin through an adhesive layer on a base sheet made of an olefin-based resin has been already applied for as a patent for the application of the present invention to the application of these technologies to the field of building materials. .

However, in these methods, an adhesive layer is absolutely necessary in order to adhere an olefin resin having no polar group to an arbitrary picture layer provided on the olefin resin sheet. For this purpose, a method has been adopted in which an adhesive layer is applied and dried, and then the olefin-based resin is melt-extruded or the olefin-based resin is further extruded onto a sheet obtained by melt-extruding the adhesive olefin-based resin. In any of the methods, an adhesive layer was present between the base sheet having the pattern and the extruded sheet.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a vinyl chloride resin sheet using a material other than a vinyl chloride resin. In particular, the present invention relates to a sheet having excellent adhesion between a base sheet and a melt-extruded sheet.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an olefin resin obtained by adding a polar group by graft polymerization to a base sheet made of an olefin resin having an arbitrary pattern. An object of the present invention is to provide a decorative sheet obtained by melting and laminating an adhesive olefin resin composed of 100 parts by weight and 1 to 10 parts by weight of an impact resistance modifier.

The details will be described below with reference to the drawings. FIG. 1 shows one embodiment of a process for producing a decorative sheet according to the present invention.
The extruder 12 is used to extrude a molten resin 9 serving as an adhesive olefin resin onto the substrate sheet 1 on which an arbitrary pattern 2 has been applied, and the extruder 12 laminates the molten resin 9 with the substrate sheet 7 on which the pattern has been applied. The decorative sheet 8 is obtained by cooling and solidifying the molten resin.

[0008] Here, as the base sheet, an olefin resin, especially an olefin thermoplastic elastomer, is desirably used. However, it can be arbitrarily mixed with another resin according to the required post-processing performance of the decorative sheet. In particular, olefin resins are difficult to color in styrene resins, inferior in weather resistance in urethane resins, and have difficulty in post-processing properties of sheets obtained from the hardness of sheets in polyester resins. Because.

Further, in order to obtain a hiding property when forming a decorative board,
The base sheet is desirably arbitrarily colored with an inorganic pigment or the like.

The ink used for the arbitrary picture 2 is not particularly limited as long as it has good adhesion to the substrate sheet, but usually, a urethane ink, a chlorinated olefin ink or the like is used.

As the molten resin 9 extruded from the extruder 12, an adhesive olefin resin is used. The adhesive olefin-based resin referred to here is a polypropylene-based resin having no polar group, an olefin-based resin such as a polyethylene-based resin,
A polar group of a monomer such as maleic anhydride or ethylene-vinyl acetate is provided by graft polymerization to give an adhesive property. These are arbitrarily selected depending on the physical properties required for the decorative sheet. As a decorative sheet for ordinary building materials, polypropylene is preferable because of its heat resistance and the like.

For the purpose of obtaining the performance required for the decorative sheet, in particular, flexibility and impact resistance at a low temperature, an α-olefin polymer or 100 1 to 10 parts by weight of an olefinic thermoplastic elastomer is mixed.

Further, these adhesive olefin resins include:
In order to make the picture 2 applied to the base sheet 1 easy to see, it is preferably highly transparent.

The extruded molten resin 9 is cooled and solidified by the cooling roll 13. Here, if a roll having an embossed pattern is used for the cooling roll, an arbitrary emboss can be obtained. The embossing obtained in this way is not mechanically embossed as in the case of the heating doubling embossing conventionally performed on decorative sheets of vinyl chloride resin sheets, but the molten resin is put into a mold and solidified. Since it is in the state of being embossed, for example, a very fine emboss used for a hologram can be entered without any problem, and the emboss having good heat resistance after embossing can be obtained.

Although the decorative sheet of the present invention can be obtained by the above-described steps, the molten resin is extruded onto a base sheet on which a pattern has been applied in order to further impart designability and a sense of quality, and an embossed cooling roll is provided. It is also possible to apply a wiping process to the surface of the embossed sheet obtained by solidification in the above.

[0016]

By using a resin obtained by adding an impact-resistant modified resin to an adhesive olefin-based resin as a molten resin extruded onto a base sheet made of an olefin-based resin having an arbitrary pattern, the adhesion is improved. Since there is no significant difference in physical properties between the olefin-based resin and the base olefin-based resin, it can be used not only as an adhesive layer but also as a resin layer on the surface of the obtained decorative sheet.

[0017]

【Example】

Example 1 A thickness of 100 μm obtained by adding a brown coloring pigment to an olefin-based thermoplastic elastomer (manufactured by Nippon Petrochemical Co., Ltd .: “Soft Rex”) and performing melt extrusion.
After performing a corona treatment on the m sheet, a wood grain pattern was applied by a gravure printing method using a urethane-based ink (manufactured by Toyo Ink Mfg. Co., Ltd .: "Ramister"). on the other hand,
Nippon Petrochemical Co., Ltd. as an adhesive olefin resin
Manufactured by Nippon Petrochemical Co., Ltd .: 100 parts by weight of "N-Polymer": A resin obtained by dry blending so that 10 parts by weight of "Soft Rex" was used. Melt extrusion was performed on a cooling roll to a thickness of 100 μm on the pattern printing surface of the base sheet to obtain a decorative sheet.

Example 2 80 μm thick base sheet
m polyolefin sheet (manufactured by Tatsuno Chemical Co., Ltd.):
After performing a corona treatment on this, a chlorinated olefin-based ink (Toyo Ink Mfg. Co., Ltd .: "NEW MAX") is used by gravure printing.
Wood grain pattern was applied. On the other hand, as an adhesive olefin resin, 100 parts by weight of "Admer" manufactured by Mitsui Petrochemical Industry Co., Ltd., and an impact-modified α-olefin resin ("Tuffmer" manufactured by Mitsui Petrochemical Industry Co., Ltd.) are used. Using a resin that was dry-blended to be 10 parts by weight, this was melt-extruded on a cooling roll on which a conduit emboss was applied by an extruder so as to have a thickness of 100 μm on the pattern printing surface of the base sheet, A decorative sheet was obtained.

<Comparative Example> 100 μm thick base sheet
m: Polyolefin sheet (manufactured by Tatsuno Chemical Co., Ltd.):
After performing a corona treatment thereon, a wood grain pattern was formed by a gravure printing method using a urethane-based ink (manufactured by Toyo Ink Mfg. Co., Ltd .: "Ramister"). An urethane-based adhesive (AD806, manufactured by Toyo Morton Co., Ltd.) is applied to the patterned sheet by a gravure method at a thickness of 4 μm, dried, and then olefin-based thermoplastic elastomer (manufactured by Nippon Petrochemical Co., Ltd.) : “Soft Rex”) was extruded by a extruder onto a cooling roll provided with a conduit embossing so as to have a thickness of 100 μm,
The laminate was adhered to obtain a decorative sheet.

The peel strength of the decorative sheet thus obtained was evaluated by a T-type peeling method. Further, the obtained decorative sheet was bonded to a wood plywood with an acrylic emulsion-based adhesive, subjected to V-cut processing, and subjected to 90 ° C.
° The bending workability was evaluated. The results are shown in the following table together with the layer configurations of the comparative example and the example.

[0021]

[Table 1]

As is clear from the above results, in the examples according to the present invention, the peel strength and the V-cut performance are more satisfactory than those of the sheet which was melt-extruded through the adhesive layer as in the comparative example. Was something. Rather, it is expected to have a small but excellent adhesiveness, and to reduce the cost because the number of layers and the number of steps are reduced.

[0023]

As described in detail above, according to the present invention, there is no need to worry about environmental problems because no vinyl chloride resin is used, and a decorative sheet having properties equal to or higher than that of the vinyl chloride resin sheet can be obtained. Can be Also, by using an adhesive olefin resin as the resin to be melt-extruded, a sheet satisfying the two functions of imparting adhesiveness and a transparent layer on the surface of the decorative sheet can be obtained. Layers are no longer needed.

[0024]

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a method for producing a decorative sheet according to the present invention.

FIG. 2 is a schematic view of a cross section of one embodiment of the decorative sheet of the present invention.

FIG. 3 is a schematic view of a cross section when a wiping process is performed on one embodiment of the decorative sheet of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Olefin resin sheet 2 ... Picture ink 3 ... Adhesive olefin resin layer 4 ... Emboss 5 ... Wiping ink 6 ... Top coat 7 ... Substrate sheet with a picture 8 ... Embossed decorative sheet 9 ... Molten resin 1
0: Unwinding roll 11: Pressure roll 12: Melt extruder 13: Cooling roll 14: Peeling roll 15: Wiping decorative sheet

Claims (1)

(57) [Claims] An olefin resin having a polar group added by graft polymerization on a base sheet made of an olefin resin having an arbitrary pattern and 100 parts by weight of an impact resistance modifier. A decorative sheet obtained by melting and laminating an adhesive olefin resin.