JPH09207300A - Manufacturing device for decorative sheet having continuous uneven pattern - Google Patents

Abstract

(57) Abstract: The present invention has a continuous concavo-convex pattern in which even a highly viscous resin liquid can be coated without entering air and the resin liquid does not squeeze out even when pressed by a rubber roll. It is to provide a manufacturing apparatus for a decorative sheet. SOLUTION: A means for supplying an electron beam curable resin 12 applied on the surface of a base sheet 11 or a mold roll 20 having an uneven pattern, and the base sheet 11 and the mold roll 20 having an uneven pattern are electron beam cured. A method for producing a concavo-convex pattern decorative sheet is provided with means for pressing with the rubber roll 21 via the mold resin 12, and means for irradiating the electron beam EB from the back surface of the base material sheet 11 to cure this resin. The electron beam curable resin 12 to be applied onto the sheet 11 or the mold roll 20 is supplied by the nozzle 15 installed at a fixed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for furniture, home electric appliances, interior materials for buildings, etc., which are laminated on a plate-like material such as wood-based cards, inorganic boards and metal plates to form a decorative plate. The present invention relates to a decorative sheet, and more particularly to a manufacturing apparatus for manufacturing a decorative sheet having a continuous uneven pattern.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a decorative sheet having an uneven pattern on its surface, a method of forming an uneven pattern by forming a decorative sheet and then pressing it with a mold such as an embossing roll, or a repellent ink After the pattern layer is formed on the surface of the substrate with a resin, a resin is applied from the top of the pattern layer, and the resin is repelled at the pattern layer portion to form an uneven pattern.

When an uneven pattern is formed by using an ultraviolet curable resin or an electron beam curable resin, after coating the resin on a base material, a mask is intentionally uncured so that the ultraviolet rays are applied. Alternatively, there is a method of forming an uneven pattern by irradiating with an electron beam to cure and then removing the uncured portion.

Further, after the electron beam curable resin is applied to the base sheet or the mold roll having an uneven pattern, the base sheet and the mold roll having the uneven pattern are brought into contact with each other through the electron beam curable resin. Then, a method of irradiating with an electron beam from the back surface of the base material sheet to cure the base material sheet and continuously forming an uneven pattern is also known.

In the above method, paper or resin film is used as the base sheet. Further, the method of coating the base sheet with the electron beam curable resin is generally performed by gravure, gravure offset, roll coating or the like, and a smoothing bar is optionally used to smooth the coated surface state. These coating methods are
There is a problem that air easily enters the resin liquid because the plate is coated while rotating.

Further, the leveling property and penetration of the electron beam curable resin differ depending on the type of the base sheet, and it is difficult to apply the resin with the same coating amount even if the same plate is used. When the mold roll having the unevenness is pressed, excess or deficiency of the applied resin occurs, and air bubbles are mixed and the resin is extruded from the base sheet, which may cause the base sheet to be cut.

As a method for bringing the base material sheet coated with the resin into close contact with a mold roll having an uneven pattern, a rubber roll is generally pressed, but when the pressing force is strong or the resin coating amount is too large. The resin is extruded from the base sheet, and the extruded resin is gradually accumulated and rises to cause breakage of the base sheet.

Further, in the electron beam curing technique, it is known that curing is inhibited when air is present in the electron beam curing resin. Since the electron beam curable resin has a relatively high viscosity as compared with an ordinary coating solution for gravure, air is mixed into the resin at the time of coating or pressing with a rubber roll.
The air trapped in the electron beam curable resin causes curing inhibition during electron beam irradiation, which causes breakage of the base sheet.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. The problem is that even a highly viscous resin liquid can be coated without entering air and is pressed by a rubber roll. An object of the present invention is to provide an apparatus for manufacturing a decorative sheet having a continuous concavo-convex pattern in which the resin liquid does not squeeze out.

[0010]

As a result of various studies in order to achieve the above object in the present invention, as a result of supplying various kinds of electron beam curable resin 12 to be coated in a manufacturing apparatus for a decorative sheet having a continuous uneven pattern. It is possible to prevent air from entering during coating and prevent breakage of the base material sheet 11 due to resin squeeze out when pressed by the rubber roll 21 by supplying a certain amount of the resin to the nozzle 15 installed at a fixed position. It was found that a decorative sheet having a continuous uneven pattern was obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention will be described below. The apparatus for producing a decorative sheet having a continuous uneven pattern according to the present invention comprises means for supplying the electron beam curable resin 12 to be applied to the surface of the base sheet 11 or the mold roll 20 having the uneven pattern, the base sheet 11 and the uneven surface. An uneven pattern is provided with means for pressing the pattern-shaped mold roll 20 with the rubber roll 21 via the electron beam curable resin 12 and means for irradiating the electron beam EB from the back surface of the base material sheet 11 to cure the resin. A decorative sheet is manufactured, and the electron beam curable resin 12 to be coated on the base material sheet 11 or the mold roll 20 is supplied by a nozzle 15 installed at a fixed position. .

The base sheet 11 in the present invention may be paper, film, non-woven fabric or the like and is not particularly limited, but the present invention is most effective for a paper base.

Further, the base sheet 11 having a pattern or the like applied thereto can be appropriately used. The ink used for pattern printing is not particularly limited as long as it has good adhesion to both the base sheet and the electron beam curable resin. These printing methods include gravure printing, gravure offset printing, screen printing and the like.

As the electron beam curable resin 12 in the present invention, an acrylate having a double bond capable of radical polymerization such as polyester acrylate, polyurethane acrylate and epoxy acrylate can be used. Further, a matting agent, a defoaming agent, a release agent, etc. may be optionally added.

As a means for supplying the electron beam curable resin 12 to be coated in the present invention, a base material sheet or a mold roll having an uneven pattern is pressed before pressing the base material sheet 11 and the mold roll 20 having an uneven pattern. The resin is supplied from the nozzle 15 provided at one of the fixed positions. The nozzle 15 is made of rubber, metal, or the like, and the diameter and shape of the tube can be arbitrarily selected depending on the viscosity and the amount of the resin to be applied. When the base sheet 11 has a wide width, it is possible to install a plurality of nozzles 15.

As a device for supplying the electron beam curable resin 12, it is sufficient that the resin does not contain air and the resin can be stably applied. For example, the electron beam curable resin liquid 12
Supply tank 1 made of metal, resin, etc. from the tank 13 for storing
A nozzle 15 made of rubber or the like is installed at the tip of 4. A resin supply pump P is provided in the middle of the supply pipe 14 so that the amount of resin applied can be adjusted according to the speed of the apparatus and the conveyance speed of the base sheet, although this is not specified. is required.

The mold roll 20 having an uneven pattern according to the present invention has a wood grain conduit pattern, an abstract pattern, and the like, but a plate depth of the pattern is preferably about 10 to 150 μm.

In the present invention, as a means for pressing the base sheet 11 against the mold roll 20 having an uneven pattern, a pressing rubber roll 21 is installed beside the mold roll 20, and an excessive amount of the electron beam curable resin 12 is pressed at the time of pressing. Is the seat lateral direction (width direction)
The structure is such that it spreads over and is coated on the entire surface of the base material sheet. At this time, the pressure applied by the rubber roll 21 and the hardness of the rubber roll 21 can be arbitrarily selected depending on the type of the base sheet 11 and the shape of the die roll 20 having an uneven pattern. Further, a peeling rubber roll 22 is installed at a position facing the pressing rubber roll 21 in order to peel the decorative sheet having the uneven pattern from the mold roll 20.

An electron beam irradiation device EB is used to cure the electron beam curable resin 12 in the present invention. The electron beam acceleration voltage is 150 kv to 250 kv, and the irradiation amount is 3 to 10 Mr.
A level of ad is preferable.

[0020]

In the apparatus of the present invention, the electron beam curable resin is supplied from the nozzle, so that air is not mixed into the resin liquid during coating, and curing inhibition by air contained in the resin liquid occurs. Absent. Further, since it is possible to change the coating amount of the resin according to the type of the substrate sheet, the width of the substrate sheet, and the coating speed, the resin to be coated can be always supplied without excess or deficiency, The protrusion due to excessive supply of resin and the mixing of air due to insufficient resin will not occur.

[0021]

The present invention will be described in detail below with reference to examples. A long roll base sheet made of impregnated paper with a width of 970 mm and 60 g in which a wood grain pattern was printed in advance by a gravure printing method on the base sheet was used at a line speed of 50 m / mi.
At n, a polyester acrylate electron beam curable resin whose viscosity is adjusted by adding a defoaming agent and a release agent in advance is made of a rubber which is installed in the coater portion so as to be the center of the flow direction of the base material sheet. The substrate sheet was coated with a coating amount of 2600 g / min from the nozzle. The surface coated with the electron beam-curable resin was pressed by a rubber roll at a pressure of 5 kgf / cm ² onto a mold roll having an uneven pattern of a wood grain conduit pattern with a plate depth of 50 μm, and the electron beam was irradiated at 200 kv and 5 Mrad. The electron beam curable resin was cured, peeled from a mold roll having an uneven pattern by a peeling rubber roll, and wound up. The decorative sheet thus obtained was a wood grain pattern decorative sheet with a coating amount of 50 g / m ² and the conduit portion was uneven, and no air entered into the electron beam curable resin, and no protrusion of the electron beam curable resin was observed. I was always able to get stable.

[0022]

As described above, the present invention has the following effects. That is, since the electron beam curable resin coating method is not a method using a plate, air is not mixed into the resin liquid during coating, and curing inhibition by the air contained in the resin liquid occurs. Absent. In addition, since it is possible to change the coating amount according to the type of the base sheet, the width of the base sheet, and the coating speed, it is possible to always supply the resin to be coated without excess or deficiency. There will be no squeeze out due to excessive supply, and no air mixing due to resin shortage. Therefore, in the production of a decorative sheet by the device of the present invention, uncured resin due to air inhibition, breakage of the base sheet due to resin protrusion does not occur, and always obtain a decorative sheet having a continuous continuous uneven pattern You can In addition, the decorative sheet thus obtained is excellent in design, and by applying wiping and top coating, it becomes a decorative sheet full of high quality.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a nozzle of a resin supply device in a manufacturing apparatus for a decorative sheet having a continuous uneven pattern of the present invention.

FIG. 2 is an explanatory view showing a resin coating device portion in the manufacturing device for a decorative sheet having a continuous uneven pattern of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Decorative sheet having an uneven pattern 11 ... Base sheet 12 ... Electron beam curable resin 13 ... Resin tank 14 ... Resin supply pipe 15 ... Resin liquid coating nozzle 20 ... Uneven pattern mold roll 21 ... Pressing Rubber roll 22 ... Peeling rubber roll EB ... Electron beam irradiation device P ... Resin supply pump

Claims (1)

[Claims] 1. A means for supplying an electron beam curable resin to be coated on the surface of a base material sheet or a mold roll having an uneven pattern,
A means for pressing the base sheet and a mold roll having a concavo-convex pattern with a rubber roll via the electron beam curable resin, and means for irradiating an electron beam from the back surface of the base sheet to cure the resin. In the manufacturing apparatus of the uneven decorative sheet, the supply of the electron beam curable resin to be applied onto the base material sheet or the mold roll is provided with a supply means by a nozzle installed at a fixed position. For manufacturing a decorative sheet having a continuous uneven pattern.