JPH06875A - Production of embossing sheet for transfer - Google Patents

Abstract

PURPOSE:To efficiently and inexpensively produce an embossing sheet for transfer by coating a film or piper with an electron beam curable resin and bringing the coated film or paper into contact with a metal roll having emboosed patterns formed to the surface thereof under pressure and irradiating the embossed film or paper with electron beam to cure the same. CONSTITUTION:After a film or paper 1 is coated with an electron beam curable resin 2, the coated film or paper is brought into contact with a metal roll 3 having embossed patterns formed to the surface thereof under pressure and irradiated with electron beam by an electron beam irradiation device 4 to be cured and the cured film or paper is separated from the metal roll. Further, the film or paper 1 may be brought into contact with the metal roll 3 having embossed patterns formed thereto and directly coated with the electron beam curable resin 2. A release varnish layer, an ink layer and adhesive varnish layer are formed on the obtained embossing sheet for transfer and the coated embossing sheet is superposed on a receiving base material to be heated and pressed to transfer the embossed release varnish layer, ink layer and adhesive varnish layer to the receiving base material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a transfer sheet such as a hot stamp transfer foil, which is capable of efficiently producing an embossing pattern of a transfer sheet which transfers an embossed shape onto the surface of a transfer object with good resolution and at low cost. It provides a way to do it.

[0002]

2. Description of the Related Art As a prior art, in a transfer sheet,
As a method of embossing, a method of embossing and printing on a base material sheet of a transfer sheet, a method of embossing on the base material sheet itself, and a method of applying a resin to the base material sheet and curing it and then embossing the resin layer are known. There is.

In the method of printing on the base sheet, the shape of the printing is not smooth and it is difficult to form an acute shape, and there is a limit in design. The method of embossing on the base sheet itself provides a good resolution to some extent but is inferior in heat resistance, and it is difficult to maintain the embossed shape formed on the base sheet by a thermal transfer method such as hot stamping. In the method of applying resin to the base material sheet and curing it, and then embossing the resin layer, it is possible to maintain heat resistance during thermal transfer by using a heat resistant resin, but roll embossing makes it difficult for embossing to occur. ,
A flat-pressing press is necessary to improve the resolution of embossing, and therefore it is hard to say that it is efficient, and it must be expensive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to make embossing of a transfer sheet extremely efficient and inexpensive. It is to provide a manufacturing method.

[0005]

In order to solve this problem, the present invention applies an electron beam curable resin to a film or paper and then press-bonds it to a metal roll having an embossed mold on the surface thereof to form a film or paper. Provided is a method for producing an embossing sheet for transfer, which is obtained by irradiating an electron beam from the back surface of the resin to cure the resin.

[0006] Further, while the electron beam curable resin is applied to a metal roll having an embossed mold formed on its surface, a film or paper is pressure-bonded to the coated surface, and the embossing agent for transfer of such a method is also used. On the mold sheet, release varnish
Provided is a method for producing a transfer sheet obtained by printing ink, an adhesive varnish or the like.

A detailed description will be given below with reference to the drawings. Figure 1
As shown in FIG. 1, after the electron beam curable resin 2 is applied to the film or paper 1, the film or paper 1 is pressure-bonded to the metal roll 3 having an embossed surface, and the electron beam curing device 4 is used to apply an electron beam from the back surface of the film or paper. Irradiate a line. The electron beam curable resin is instantly cured, and the shape of the metal roll is transferred to the electron beam curable resin when the film or paper is released from the metal roll. The transfer embossing sheet as shown in FIG. Is obtained.

The same applies when the electron beam curable resin 2 is directly applied to the metal roll 3 having an embossed surface.

Here, the film or paper 1 has a thickness of 6
It is possible to use a polyester film, a polypropylene film or the like having a thickness of ˜100 μm, a high quality paper having a basis weight of 30 to 120 g / m ² , and the like.

As the electron beam curable resin 2, a (meth) acrylic acid ester oligomer such as urethane acrylate, polyester acrylate, or silicon acrylate is mixed with a monofunctional or polyfunctional monomer, and optionally an additive such as a slip agent. And the viscosity is several tens to several hundreds cp
An electron beam curable resin adjusted to s is preferable.

The metal roll 4 having an embossed shape on its surface is embossed by a usual engraving method, a corrosion method, an electroforming method, a sandblast method, etc. Since varnish is applied to the electron beam curable resin layer on which the embossed shape is transferred,
A depth of 0 μm or less is desirable.

The acceleration voltage of the electron beam emitted from the electron beam curing device 4 is 150 to 250 Kv, and the irradiation amount is 2 to 10 Mr.
Ad is good. Usually, this treatment is possible at a line speed of 50 to 150 m / min, so that the production efficiency is extremely high.

FIG. 3 is a cross-sectional view of a hot stamp transfer foil using this transfer embossing type sheet, in which an electron beam curable resin 2 having an embossed shape transferred to a film or paper 1 is coated with a release varnish layer 5, The ink layer 6 and the adhesive varnish layer 7 are formed.

A transfer foil is placed on a transfer substrate such as plastic, and the film or paper 1 is heated by a transfer roll or the like.
From the side, after applying pressure, the film or paper 1 is peeled off to release the electron beam curable resin 2 and the peeling varnish 5, and a peeling varnish layer having an embossed shape is formed on the transferred substrate. , The ink layer and the adhesive varnish layer are transferred.

[0015]

[Function] The embossing of the transfer sheet is carried out by the resin applied to the film or paper completely entering the recess of the embossed metal roll and using an electron beam in contact with the metal roll. Because it hardens to
The embossed shape of the resin layer is the same as the embossed shape of the metal roll.

[0016]

【Example】

<Example 1> An electron beam curable resin (Evecryl 1016 / Evecryl 350 manufactured by Daicel UCB) adjusted to a viscosity of 300 cps was applied to a polyester film having a thickness of 25 μm at 20 g / m ² and then an embossed shape was formed. It is pressure-bonded to the prepared metal roll, and the back surface of the film is irradiated with an electron beam with an acceleration voltage of 200 Kv and a dose of 5 Mrad.
After curing the electron beam curable resin, the film was released.

The surface of the metal roll has a depth of 15 μm.
In m, one pattern unit is composed of patterns having groove-shaped irregularities of parallel straight lines or curved lines in the same direction with minute intervals of 50 to 300 μm, and a groove shape with a pattern unit in which at least a plurality of pattern units are aligned with each other. The embossed shape is formed by changing the angle of the concavo-convex shape and is chrome-plated.However, this embossed shape is inverted as it is in the cured electron beam curing resin, and the embossing sheet for transfer is obtained. It was

<Embodiment 2> The transfer embossing sheet obtained in Embodiment 1 was coated with an acrylic resin release varnish, a vinegar-based vinyl chloride ink with a grainy pattern, a colored solid, and an acrylic adhesive varnish. Were sequentially printed to obtain a transfer sheet. On the other hand, thickness 13
A 0 μm aluminum base material coated with a thermoplastic epoxy primer was used as a transfer base material, and while the transfer base material was heated to 120 ° C., a transfer roll held at 160 ° C. was used to transfer the transfer sheet and the transfer base material. After transferring by pressing the surface of the thermoplastic epoxy primer, the transfer sheet was peeled off.

As a result, the embossed shape of the electron beam curable resin was reversed in the release varnish layer, that is, the embossed shape formed on the metal roll in Example 1 was formed, and the embossed shape was provided with the grain-like pattern. An extremely excellent decorative aluminum substrate was obtained.

[0020]

As described above, according to the method for producing an embossing patterning sheet for transfer of the present invention, a patterning sheet for a transfer sheet, which also transfers an embossed shape to the surface, has a surface resin layer of a metal roll. Since it is formed as it is in the embossed shape that was formed in, the resolution is good. Moreover, since it can be manufactured in a continuous line, it can be manufactured at low cost. Further, the surface resin layer of this pattern-forming sheet has excellent heat resistance and is not affected by heating and pressing during transfer.

[0021]

[Brief description of drawings]

FIG. 1 is a schematic view of forming an embossed shape on a transfer embossing sheet.

FIG. 2 is a cross-sectional view of a transfer embossing sheet.

FIG. 3 is a sectional view of a transfer foil using an embossing sheet for transfer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film or paper 2 ... Electron beam curable resin 3 ... Embossed metal roll 4 ... Electron beam irradiation device 5 ... Release varnish layer 6 ... Ink layer 7 ... Adhesive varnish layer

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B32B 31/28 7141-4F

Claims (3)

[Claims] 1. By coating an electron beam curable resin on a film or paper, pressing it onto a metal roll having an embossed mold on its surface, and irradiating an electron beam from the back surface of the film or paper to cure the resin. The manufacturing method of the embossing type | mold sheet for transfer obtained. 2. A metal roll having an embossed mold formed on the surface thereof is coated with an electron beam curable resin, a film or paper is pressure-bonded to the coated surface, and an electron beam is irradiated from the back surface of the film or paper to cure the resin. A method for producing an embossed transfer sheet for transfer obtained by curing. 3. A method for producing a transfer sheet obtained by printing a release varnish, an ink, an adhesive varnish, etc. on the transfer embossing sheet according to the method of claims 1 and 2.