JPH07213973A - Method and apparatus for producing continuous decorative paper - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a method and an apparatus capable of extremely efficiently and inexpensively producing a decorative paper having an uneven pattern excellent in design. [Structure] After the electron beam curable resin 1 is applied to the surface of a paper 2 or a mold roll 3 having an uneven pattern, the paper and the mold roll having an uneven pattern are sandwiched between the coated surfaces of the electron beam curable resin. In the production of a continuous concave-convex pattern decorative paper which is made by contacting and irradiating the electron beam 6 from the back surface of the paper to cure the electron-beam curable resin, peeling the paper from the mold roll having the concave-convex pattern immediately under the irradiation of the electron beam. Characterize.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a decorative material used for building materials, etc., especially continuous decorative paper.

[0002]

2. Description of the Related Art As a method for producing an uneven decorative material having an uneven pattern on its surface, a decorative material is prepared and then pressed with another mold such as an embossing roll to form the uneven pattern, or the repulsive property is improved. A method of forming a pattern layer on the surface of a substrate with a printing ink mixed with a substance having, and forming a concavo-convex pattern by repelling the resin to be applied on the pattern layer portion has been conventionally performed. There is.

When an uneven pattern is formed using an ultraviolet curable resin or an electron beam curable resin, after the curable resin layer is formed on a base material, an ultraviolet ray or an electron beam is used by using a mask having a predetermined shape. There is a method of irradiating with, and partially curing, and removing the uncured portion to form an uneven pattern. Also,
A method of applying an electron beam curable resin to a base material or a mold roll having an uneven pattern, and then contacting the mold roll having the uneven pattern, and irradiating an electron beam during the contact to continuously form the uneven pattern. Is also known.

However, when paper is used as the base material, due to the curing shrinkage of the electron beam curable resin, the die roll having an uneven pattern strongly sticks to the uneven portion, the adhesion strength exceeds the strength of the paper, and peeling occurs. It causes a piece of paper to run out.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a decorative paper having an uneven pattern excellent in designability. An object of the present invention is to provide a method that can be efficiently and inexpensively manufactured and an apparatus used for the method.

[0006]

In order to solve this problem, the present invention is to apply an electron beam curable resin to the surface of a paper or a mold roll having an uneven pattern, and then form the paper and the mold roll having an uneven pattern. In contact with the coated surface of the electron beam curable resin, sandwiching the coated surface of the electron beam curable resin, and irradiating an electron beam from the back side of the paper to cure the electron beam curable resin, in a method for producing a continuous concavo-convex pattern decorative paper, directly under irradiation with the electron beam. Disclosed is a method for producing a decorative paper having a continuous uneven pattern, which comprises peeling paper from a mold roll having an uneven pattern, and a manufacturing apparatus used for the same.

The present invention will be described in detail below with reference to figures. 1 and 2 schematically show an example of the manufacturing method and the manufacturing apparatus of the present invention. In FIG. 1, first, an electron beam curable resin 3 is applied to a paper 2 by a coating device 1, and the coated surface of the paper is brought into contact with a mold roll 5 having an uneven pattern via a nip roll 4. Thereafter, the paper 2 is peeled off from the mold roll 5 having the uneven pattern directly below the electron beam irradiation using the electron beam irradiation device 6. FIG. 2 shows a mold roll having an uneven pattern in which an electron beam curable resin 3 is applied to a mold roll 5 having an uneven pattern by a coating device 1 ′, and a paper 2 is coated with the electron beam curable resin through a nip roll 4. Contact 5.
Thereafter, the paper 2 is peeled off from the mold roll 5 having the uneven pattern directly below the electron beam irradiation using the electron beam irradiation device 6.

Immediately below the electron beam irradiation, the electron beam curable resin is undergoing a radical polymerization reaction. It has polymerized to the extent that it can be retained as a coating film, and has not yet polymerized to the extent that it clings to the irregularities of a mold roll having an irregular pattern. Therefore, the strength of the paper exceeds the adhesive strength, and the paper can be processed without causing paper breakage at the peeled portion.

As the base paper, thin paper, resin mixed paper, base paper for decorative paper such as titanium paper is used and is not particularly limited. Further, the surface may be printed or the like.

The appropriate depth of the unevenness of the mold roll having the uneven pattern is 10 μm to 100 μm.

The method for applying the electron beam curable resin is not particularly limited, and examples thereof include gravure coating, gravure offset coating, roll coating, lip coating, fountain coating and the like.

As the main component of the electron beam curable resin, an acrylate having a double bond capable of radical polymerization, that is, polyester acrylate, urethane acrylate, epoxy acrylate, polyester methacrylate, urethane methacrylate, epoxy methacrylate or the like can be used. Other additives can be contained as appropriate.

It is preferable that the accelerating voltage of the electron beam emitted from the electron beam irradiating device is 150 to 200 kV and the irradiation amount is about 3 to 5 Mrad. Usually, this treatment is possible at a line speed of 50 to 150 m / min, and therefore the production efficiency is extremely high.

[0014]

As described above, according to the method for producing a continuous decorative paper having a concave-convex pattern of the present invention, the paper is peeled from the mold roll having the concave-convex pattern directly under the irradiation of the electron beam without causing a paper break at the peeled portion. A decorative paper having an uneven pattern with excellent design can be manufactured extremely efficiently and inexpensively.

Further, the continuous uneven-pattern decorative paper manufacturing apparatus of the present invention is characterized in that the paper is peeled off from the mold roll having the uneven pattern directly under the irradiation of the electron beam. The part to be more peeled is a part to be irradiated with the electron beam irradiation device, and there is no peeling roll or pressure roll in the part for peeling the paper from the mold roll, which has a normal structure. After the peeling, the decorative paper has a structure in which it is sent as it is from a mold roll having an uneven pattern to a winding roll. As a result, the continuous uneven decorative sheet manufacturing apparatus of the present invention enables the paper to be peeled from the mold roll having the uneven pattern immediately below the electron beam irradiation.

[0016]

【Example】

<Example 1> As a base paper, a decorative paper having a basis weight of 50 g / m ² on which a mahogany grain pattern was printed was used, conveyed at a line speed of 60 m / min, and an electron beam having the following composition was formed by a roll coater. A curable resin was applied at 80 g / m ² .

Polyester acrylate (manufactured by Toagosei Chemical Industry Co., Ltd .: “Aronix M-8030”) 65 parts by weight Nonanediol diacrylate (manufactured by Shin-Nakamura Chemical Co., Ltd.) 30 parts by weight Silicone diacrylate (Daicel UCB (stock) ): "EBECRYL-350") 5 parts by weight Total 100 parts by weight

As a mold roll having a concavo-convex pattern, a mold roll having a concavo-convex pattern of wood grain was used, and the above decorative paper was brought into contact with and crimped with a nip roll, and then irradiated with an electron beam at 3 Mrad. The paper was peeled off from the mold roll immediately under the irradiation. The decorative paper thus obtained had an elegant wood grain conduit and was excellent in performance.

<Embodiment 2> As a mold roll having a concavo-convex pattern, one pattern unit is composed of a pattern having groove-shaped concavo-convex shapes of parallel straight lines or curved lines in the same direction with fine intervals of 50 to 300 μm. An electron beam curable resin having the following composition is used with a fountain coater from the lower part to a mold roll having an embossed pattern pattern in which the pattern units are combined at least with the adjacent pattern units by changing the angle of the groove-shaped concavo-convex shape. Was applied at 60 g / m ² .

Polyester acrylate (manufactured by Daicel UCB Ltd .: “EBECRYL810”) 65 parts by weight Tripropylene glycol diacrylate (manufactured by Toa Gosei Chemical Co., Ltd .: “Aronix M-220”) 30 parts by weight Silicone diacrylate (Daicel) UCB Co., Ltd .: "EBECRYL-350") 5 parts by weight Total 100 parts by weight

Solid basis printing 80 as basis paper
Use a decorative paper of g / m ² and apply it to a line speed of 60 m.
After making contact with the mold roll having the uneven pattern and the nip roll at a pressure of / min, the electron beam was irradiated with 3 Mrad. The paper was peeled off from the mold roll immediately under the irradiation. The decorative paper thus obtained has an extremely elegant continuous uneven pattern,
It also has excellent performance.

[0022]

As described above, the continuous embossed decorative paper according to the present invention has an embossed pattern excellent in designability, is excellent in performance, and can be manufactured extremely efficiently and inexpensively.

[0023]

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for producing a continuous relief pattern decorative paper according to the present invention.

FIG. 2 is an explanatory view of a method for producing a continuous uneven decorative paper according to the present invention.

[Explanation of symbols]

1, 1 '... coating device 2 ... paper 3 ... electron beam curable resin
4 ... Nip roll 5 ... Mold roll having uneven pattern 6 ... Electron beam irradiation device

Claims (2)

[Claims] 1. An electron beam curable resin is applied to a paper surface or a mold roll surface having an uneven pattern, and then the paper and the mold roll having an uneven pattern are contacted with each other with the surface coated with the electron beam curable resin interposed therebetween. In the method for producing a continuous uneven pattern decorative paper obtained by irradiating an electron beam from the back side of the paper and curing the electron beam curable resin, the paper is peeled off from the mold roll having the uneven pattern immediately below the electron beam irradiation. A method for producing a continuous uneven decorative paper. 2. An electron beam curable resin is applied to the surface of a paper or a mold roll having an uneven pattern, and the paper and the mold roll having an uneven pattern are contacted with each other with the surface coated with the electron beam curable resin interposed therebetween. In the manufacturing apparatus for a continuous uneven pattern decorative paper obtained by irradiating an electron beam from the back side of the paper and curing the electron beam curable resin, the paper is peeled off from the mold roll having the uneven pattern immediately below the electron beam irradiation. Equipment for the production of continuous concavo-convex decorative paper.