JP2002192612A - Method for manufacturing embossed heat-resistant decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative material having durability and having wide patterns and various embossed patterns from an aspect of design effect, capable of corresponding to a small lot and requiring no coating or lamination. SOLUTION: The embossed heat-resistant decorative material is manufactured by forming a printing layer due to colored ink on the surface of a release film made of a polyethylene terephthalate resin, applying an ionizing radiation curable transparent resin paint to the printing layer in a thickness of 120-500 μm to irradiate the paint layer with ionizing radiation to semicure the same, applying emboss processing with an emboss depth of 5-200 μm to the coated film, and further irradiating the coated film with ionizing radiation to almost perfectly cure the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor material, an interior decoration material, a vehicle interior material, a furniture member, a kitchen door, and a decorated decorative material, and relates to heat resistance, abrasion resistance, scratch resistance, and the like. The present invention relates to a cosmetic material having excellent chemical resistance and solvent resistance, and having a wide variety of designs and various embossed patterns.

[0002]

2. Description of the Related Art Conventionally, an ionizing radiation-curable transparent resin paint is applied to the surface of a decorative material, an embossed release film is laminated on the surface, and the film is irradiated with radiation and cured. There are a method of transferring the embossed surface by peeling the release film and a method of adding a special release agent to the paint and irradiating ultraviolet rays or an electron beam at the same time as embossing to cure.

[0003]

As for the above-mentioned embossed release film, a general-purpose embossed pattern is commercially available, but there is no special pattern such as a pipe pattern of various woods.
It is difficult to emboss deeper than 20 μm, and addition of a release agent is not widely used because the viscosity of the paint is limited due to the limitation.

[0004]

The object of the present invention is to solve the above-mentioned problems, to be excellent in heat resistance, abrasion resistance, scratch resistance and chemical resistance, to be able to cope with small lots, and not to need painting or lamination. It is an object of the present invention to provide a durable decorative material having a wide design and various embossed patterns.

[0005]

According to the present invention, a printing layer made of a colored ink is formed on the surface of a release film made of polyethylene terephthalate resin made of polyethylene terephthalate resin, and an ionizing radiation-curable transparent film is formed on the printing layer. A resin coating is applied in a thickness of 120 to 500 μm, and after being semi-cured by irradiating with ionizing radiation, an emboss depth of 5 to 200 μm
The method for producing an embossed heat-resistant decorative material, characterized in that the embossing is performed, and then the film is almost completely cured by irradiating with ionizing radiation.

[0006] The present invention also provides a printing layer made of a colored ink on the surface of a release film made of polyethylene terephthalate resin made of polyethylene terephthalate resin.
On the printing layer, an ionizing radiation-curable transparent resin coating containing a photopolymerization initiator is applied in a thickness of 120 to 500 μm,
After semi-curing by UV irradiation, emboss depth 5 to 200
This is a method for producing an embossed heat-resistant decorative material, which has been subjected to an embossing process of μm and then irradiated with an electron beam to be almost completely cured.

[0007] The binder resin of the coloring ink used is a thermoplastic resin binder, and the surface of a release film made of polyethylene terephthalate resin may be subjected to release treatment. For example, nitrocellulose or vinyl chloride may be used. -An untreated release film can be used as a binder resin such as a vinyl acetate copolymer resin.In the case of a resin binder such as a polyester resin, an acrylic resin, or a urethane resin, the release film subjected to the release treatment described above is used. Can be used.

[0008] A known printing method can be used for forming the printing layer, and specific examples include gravure printing, offset printing, and screen printing.

As the ionizing radiation-curable transparent resin coating used in the present invention, a known solventless type resin coating can be used. For example, a polyfunctional having a functional group such as an acryl group, a methacryl group, an allyl group or a vinyl group can be used. The main component of which is a urethane acrylate oligomer and a monomer component such as tripropylene glycol diacrylate can be used. In addition, abrasion resistance is improved by mixing 1 to 20% by weight of an inorganic filler such as alumina and silica in the paint, and fine resin beads such as acrylic urethane beads are further improved to prevent scratches. be able to.
Further, various additives such as a flame retardant and an ultraviolet absorber can be blended.

As the photopolymerization initiator to be added to the above-mentioned ionizing radiation-curable transparent resin paint, known ones can be used. For example, one or two or more of acetophenone, benzophenone, benzoate, sulfide and the like can be used. Can be used in combination. The addition amount of these photopolymerization initiators may be an amount necessary for semi-curing, and 0.1 to 3 parts by weight is sufficient with respect to 100 parts by weight of the ionizing radiation-curable transparent resin paint. The amount may be increased, and the amount of ultraviolet irradiation may be adjusted to perform semi-curing.

As the method for applying the above-mentioned paint, various methods such as a gravure coating method, a bar coating method, a roll coating method, a die coating method, a blade coating method, a reverse roll coating method and a curtain flow coating method can be used. The thickness of the coating film can be generally from 120 to 500 μm, preferably from 150 to 400 μm. As a curing method, a method of irradiating a radiation such as an ultraviolet ray or an electron beam may be used. If the thickness is less than 120 μm, it is insufficient to form an embossed pattern, and if it exceeds 500 μm, the cost increases, which is not preferable.

After semi-curing the above coating material, the coating material is subjected to embossing with an embossing depth of 5 to 200 μm, preferably 10 to 170 μm, and more preferably 20 to 150 μm. Is done. If the emboss depth is less than 5 μm, the design is poor,
If the thickness exceeds 0 μm, the thickness of the coating is required and the cost increases, which is not preferable.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below.

EXAMPLE 1 A straight-grain pattern of oak was printed on the surface of a 25 μm-thick release film made of polyethylene terephthalate resin (“Emblet S” manufactured by Unitika). The gravure plate used for printing is made by dividing the straight-grained pattern of oak into three colors to form a third plate, a medium that is a transparent ink using nitrocellulose as a binder, a black ink containing a black pigment in the medium, and a red ink in the same manner. Ink, yellow ink, palm gold ink and brown ink were prepared. Perform solid printing on the surface of the release film using brown ink, and use the above medium, palm gold ink, black ink, red ink, and yellow ink, , 77.2: 19.3: 1.0: 0.6: 1.9, and the color of the second plate was 83.9: 4 using medium, black ink, red ink, and yellow ink. .2: 2.5:
The ratio of 9.4 is used, and the color of the handle of the oak pipe of the third edition is 62.0: 12.6: 6.5: 28.9, and the printing layer is formed by gravure printing in order. did. next,
On the printing layer, a radiation-curable transparent resin paint (Daicel U.R.
100 parts by weight of "KRM7820" manufactured by CB, and photopolymerization initiator ("Darocur 117" manufactured by Merck)
3 ") Add 2 parts by weight, and use a die coater to obtain a thickness of 2
It was applied to a thickness of 100 μm, and was semi-cured through an ultraviolet irradiation device (manufactured by Ushio Inc.) at 120 W / cm and 20 m / min. . Next, the coating material was cured through an electron beam irradiation device (curtain beam system, manufactured by Nissin Electric Co., Ltd.) under the conditions of an acceleration voltage of 250 KV and an irradiation dose of 4 Mrad to obtain a decorative material. The release film on the back side of the decorative material was peeled off, and a urethane-based moisture-curing hot melt adhesive (manufactured by Aron Evergrip) was applied to the print pattern layer side at 80 g / m ² , and the surface of the plywood floor material was applied. On the side, a lapping machine (manufactured by Marunaka Kakoki Co., Ltd.) was used to bond together to obtain a flooring material having heat resistance, abrasion resistance and design.

Comparative Example 1 A radiation-curable transparent resin paint (polyurethane acrylate oligomer) as a main component was coated on the surface of a 25 μm-thick release film made of polyethylene terephthalate resin (“Emblet S” manufactured by Unitika). To 100 parts by weight of “KRM7820” manufactured by Daicel UCB, 2 parts by weight of a photopolymerization initiator (“Darocur 1173” manufactured by Merck) was added, and the resulting mixture was applied to a thickness of 200 μm using a die coater, and 120 W / Cm, semi-cured through an ultraviolet irradiation device (manufactured by Ushio Inc.) at 20 m / min, and heated emboss roll (temperature: 100 ° C.) to a maximum depth of 100 μm.
An embossed pattern of the conduit was formed. Next, acceleration voltage: 25
The coating material was cured through an electron beam irradiation device (curtain beam system, manufactured by Nissin Electric Co., Ltd.) under the conditions of 0 KV and irradiation dose: 4 Mrad to form a transparent surface layer having an embossed pattern. The release film on the back side of the transparent surface layer was peeled off, and the straight grain pattern of the oak used in Example 1 was printed on the back side in the order of 3rd edition, 2nd edition, 1st edition, solid printing, Although the printing layer was formed, unevenness was also generated on the back surface side in the embossing step, and printing was partially missing. In addition, there is a disadvantage that the peel strength of the printed layer is low.

[0016]

According to the production method of the present invention, it is possible to form a wide embossed pattern inexpensively and inexpensively by the conventional embossed release film method, and to obtain a precise pattern on a release film made of polyethylene terephthalate resin having high surface smoothness. It has a feature that it can be formed as a print layer and that the surface of the substrate is coated with an ionizing radiation-curable transparent resin paint and the print layer is transferred during curing, so that the print layer has excellent peel strength.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B32B 31/22 B32B 31/22 33/00 33/00 C09D 5/00 C09D 5/00 Z 175/16 175/16 ( 72) Inventor Yoshikatsu Masuda 1-18-1 Kyobashi, Chuo-ku, Tokyo F-term (reference) 4D075 BB06Z BB46Y BB46Z CA02 CA44 CB36 DA04 DB36 DC31 DC38 EA21 EB38 EC37 4F100 AJ06B AK01C AK15B AK15A22K AK51C AL01B AP02 BA03 BA10A BA10C CB02 CC00C DD01 EH46C EH462 EJ082 EJ392 EJ532 EJ542 GB07 HB21 HB31B JB14C JJ03 JL10B JN01C 4F209 AC03 AG03 PA03 PB02 PC05 PG05 PH27 PN03 PC0501

Claims (4)

[Claims] 1. A printing layer made of a colored ink is formed on the surface of a release film made of polyethylene terephthalate resin, which is made of polyethylene terephthalate resin.
After applying an ionizing radiation-curable transparent resin paint in a thickness of 120 to 500 μm, and irradiating with ionizing radiation and semi-curing,
A method for producing an embossed heat-resistant decorative material, comprising: embossing with an emboss depth of 5 to 200 [mu] m; 2. A printing layer made of a colored ink is formed on the surface of a release film made of polyethylene terephthalate resin, which is made of polyethylene terephthalate resin.
An ionizing radiation-curable transparent resin coating containing a photopolymerization initiator is applied in a thickness of 120 to 500 μm, semi-cured by irradiation with ultraviolet light, embossed to an emboss depth of 5 to 200 μm, and further subjected to an electron beam. And a method for producing an embossed heat-resistant decorative material, wherein the heat-resistant decorative material is almost completely cured by irradiation. 3. The embossed heat-resistant decorative material according to claim 1, wherein the ionizing radiation-curable transparent resin paint is mainly composed of a polyfunctional urethane acrylate oligomer. Production method. 4. The method for producing an embossed heat-resistant decorative material according to claim 1, wherein the binder resin of the coloring ink is nitrocellulose or a vinyl chloride-vinyl acetate copolymer resin.