JPH02141300A - Transfer method - Google Patents

Abstract

PURPOSE:To apply a highly aesthetic pattern with good productivity by superposing the pattern layer of a transfer medium on the adhesive layer of a transfer object and pressing the picture layer using a protruding pad having elasticity while leveling the adhesive layer on the side of the transfer medium to perform transfer. CONSTITUTION:After an adhesive 2 is applied to an intaglio formed according to the shape of a transfer object 5 and the unnecessary adhesive 2 is scraped off by a doctor blade 3. A curved protruding pad 4 having elasticity composed of rubber sponge or silicone rubber is pressed to the intaglio 1 to bond the adhesive 2 left in the ink pocket of the intaglio to the surface of the pad 4. This pad 4 is pressed to the transfer object 5 to transfer the adhesive 2 to the transfer object 5 to form an adhesive layer 2A. Next, a pad 8 having the same shape as the pad 4 is used and a transfer medium 6 is superposed on the adhesive 2A formed on the transfer object 5 and pressed by the pad 8 to be closely bonded to the transfer object 5. The area to which the adhesive layer 2A is formed is made smaller than that of the pattern layer 7 of the transfer medium 6 and the adhesive layer 2B is forcibly spread to become the same shape as the pattern layer 7 of the transfer medium 6. Next, when the transfer medium 6 is released, only the pattern layer 7 is left on the transfer body 5. By this method, a highly aesthetic pattern can be applied to a plastic product with good productivity.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transfer method for transferring a pattern layer of a transfer medium to an object to be transferred, and particularly relates to a transfer method using an elastic convex pad. be.

(Prior art) For plastic products and metal products of various shapes,
Patterning is becoming popular, and moreover, high cosmetic quality is required for the patterning.

Conventionally, various methods have been proposed and widely implemented as this type of patterning technology, but when the plastic product is an optical recording medium such as an optical disk, the patterning method is silk screen. Printing was in progress.

[Problem to be solved by the invention]

However, when silk screen printing is used to add patterns to plastic products, etc., compared to offset printing, gravure printing, or primary color printing, which is done on ordinary paper, it is not as glossy, and the halftone dots are not reproduced as well. There were problems in that the quality of the images was poor and the quality of the designs was poor.

In addition, for plastic products, etc., it is often necessary to print large quantities of the same product, so silk screen printing
Productivity was poor.

Furthermore, for plastic products such as discs and other shapes,
When printing in multiple colors, it was difficult to align the printing positions of each plate, so-called registration, and the printing accuracy was poor. Silk screen printing itself is difficult if the surface of the plastic product is not flat.

On the other hand, a transfer method is effective as a method of forming a highly cosmetic pattern. That is, various methods such as offset printing, gravure printing, flexo printing, and primary color printing can be selected as a printing method for the transfer film, and the printing quality is maintained after the transfer film is transferred.

However, in the case of water transfer, productivity is poor, and in the case of heat transfer, there is a risk that plastic products etc. may be deformed. especially,
In the case of optical recording media and the like, deformation is a major problem. In addition, in the case of solvent transfer, productivity is low, and when transferring with a flat or circular press, air bubbles tend to get mixed in between the pattern layer and the solvent protrudes from the pattern layer, resulting in poor appearance. was bad.

An object of the present invention is to provide a transfer method that eliminates the problems caused by conventional transfer and allows highly decorative designs to be applied to plastic products and the like with high productivity.

[Means to solve the problem]

The transfer method according to the present invention basically involves applying an adhesive to the transfer target to form an adhesive layer, closely adhering the pattern layer of the transfer medium, and after completion of adhesion, leaving the pattern layer on the transfer medium. The structure is such that the image is peeled off and transferred.

FIG. 1 and FIG. 2 are diagrams for explaining the gist of the transfer method according to the present invention.

First, with reference to FIG. 1, the process of forming an adhesive layer on an object to be transferred will be described.

In this process, an adhesive is applied to the intaglio surface, and an elastic convex pad is used to print the adhesive onto the transfer target to create a contact shape that does not protrude from the pattern layer of the transfer medium. This is the process of forming layers.

The intaglio plate 1 is made into a size and shape that is the same as or larger than the adhesive layer 2A to be formed. Here, when applying two adhesive layers to the entire surface of the transfer target 5, it is also possible to
The application shape of the adhesive layer 2A can also be adjusted by making the shape of the pad 4, which will be described later, the same as the shape of the pattern layer. On the other hand, for example, when a CD has a hole in the center and there is no need to apply adhesive locally, it is difficult to adjust the shape of the pad 4, and the unevenness of the intaglio 1 makes adjustment difficult. do.

As described above, after applying the adhesive 2 to the intaglio plate 1 suitably created according to the shape of the transfer target 5, unnecessary adhesive 2 is scraped off with the doctor blade 3 (FIG. 1(a)).

The adhesive 2 may be any adhesive as long as it can be bonded by applying pressure at room temperature, and for example, vinyl chloride/vinyl acetate copolymer adhesives, urethane adhesives, acrylic adhesives, and the like can be used.

The pad 4 is made of a resilient curved convex material such as rubber sponge or silicone rubber (see Fig. 1).The material, planar shape, and curvature of the tip of the pad 4 should be adjusted depending on the transfer target. It can be selected as appropriate depending on the shape of 5.

By pressing this pad 4 onto the intaglio 1 (first
Figure (C)), adhesive 2 remaining in the ink pocket of intaglio 1
is attached to the surface of the pad 4 (FIG. 1(d)).

This pad 4 is pressed against the transfer target 5 (Fig. 1(e)).
), the adhesive 2 is transferred to the transfer target 5, and the adhesive layer 2A is
(FIG. 1(f)). At this time, the area of the adhesive layer 2A can be finely adjusted depending on the degree of pressing force of the pad 4. Moreover, even if the transfer target 5 has some curls or irregularities, the adhesive layer 2A can be formed.

The transfer object 5 has a circular or oval transfer surface.

Any shape that is easy to manufacture, such as a polygon, can be used, such as video discs, compact discs (CDs), etc.
Optical storage media such as CD-ROM, optical cards,
Cards such as IC cards, containers, and other objects can be targeted. Note that even if the transfer surface is a curved surface or has some unevenness, it can be used as a transfer target.

Next, with reference to FIG. 2, the process of transferring the pattern layer to the object to be transferred will be explained.

In this process, the pattern layer of the transfer medium is placed on the adhesive layer of the object to be transferred, and using an elastic convex pad, the pattern layer is pressed and transferred from the transfer medium side while leveling the adhesive layer. It is.

The transfer medium 6 has a peelable pattern layer 7 to be transferred onto a support such as a film, and if necessary, a protective layer may be formed on the surface of the pattern layer 7 to be transferred, or a protective layer may be formed on the back surface. A hiding layer can be formed.

The pad 8 can have the same shape as the pad 4 described above (FIG. 2(a)).

The transfer medium 6 is placed on the adhesive layer 2A formed on the transfer object 5, and pressed with a pad 8 to bring it into close contact.

At this time, since the pads 8 gradually come into contact with each other from the tip, even if air bubbles are mixed between the transfer medium 6 and the adhesive layer 2A, they can be pushed outward (Second (b)).
figure). Furthermore, even if the adhesive layer 2A has some coating unevenness, the adhesive layer 2A can be made uniform.

The area formed by the adhesive Ji2A is the pattern layer 7 of the transfer medium 6.
When the pressure of the pad 8 is completed, the adhesive layer 2B is spread out and has the same shape as the pattern layer 7 of the transfer medium 6 (FIG. 2(C)).
. Therefore, the adhesive 2 no longer protrudes.

At this time, depending on the degree of pressing force of the pad 8, the adhesive layer 2
The spread area of A can be finely adjusted. Furthermore, the spread area of the adhesive layer 2A can be limited by the shape of the band 8 and the rubber strength. Regarding the shape of the pad 8, the spreading area can be adjusted by decreasing the curvature, and regarding the rubber strength, by decreasing the hardness.

These means for adjusting the spread area of the adhesive layer 2A may be used alone or in combination.

Finally, when the transfer medium 6 is peeled off, only the pattern layer 7A remains on the transfer target 5, and the transfer is completed (FIG. 2(d)).

The process shown in FIG. 2 described above may be combined with a process of forming an adhesive layer by a method such as a roll coating method, a spin cord method, a silk screen method, a blade coating method, etc.
It may be combined with the process shown in FIG.

Hereinafter, a case will be described in which the process shown in FIG. 1 and the process shown in FIG. 2 are combined. First, as shown in the process in Figure 1,
Adhesive JW2A is applied to the transfer object 5 using the pad 4 so as not to protrude the pattern layer 7 of the transfer medium 6. Preferably, the adhesive layer 2A is applied to the transfer object 5 in a shape smaller than the shape of the pattern layer 7 and similar to the shape of the pattern layer 7.

Next, as shown in the step of FIG. 2, the adhesive layer 2A is pressed into the same shape as the pattern layer 7 of the transfer medium 6 using the pad 8. At this time, as described above, since the pressing force between the pad 4 and the pad 8 can be adjusted as appropriate, the spread area of the adhesive layer 2A due to the pressing force of the pad 8 is adjusted by the difference in the pressing force between the pad 4 and the band 8.

Further, adjustment may be made by adjusting the shape of the pad 4 and the band 8 and the difference in rubber hardness. Of course, in the process shown in FIG. 1, if an adhesive layer having substantially the same shape as the pattern layer is applied, there is no need for any difference in the pressing force of the pads 4.8.

By combining the process shown in FIG. 1 and the process shown in FIG. 2, the adhesive layer 2B can be formed more uniformly and with a more accurate area between the transfer medium 6 and the transfer target 5.

As explained in detail above, the transfer method according to the present invention includes:
It is possible to maintain the high image quality of the transfer medium and prevent damage to the transfer target due to transfer.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings and the like.

FIG. 3 is a diagram for explaining an embodiment of the transfer method according to the present invention.

In this embodiment, a compact disc (CD) 15 will be described as an example of the transfer target 5.

The compact disc 15 is made by molding a tape substrate with fine pits on its surface from polycarbonate resin.
A reflective layer is formed on the surface of the disk substrate by aluminum vapor deposition, and a protective layer made of acrylic resin is further formed on the surface of the reflective layer.

Compact Disc I5 is s! A large number of sheets are placed on the mounting table 20 , and are sucked by the suction pad 21 a of the supply arm 21 and supplied to the conveyor 22 .

The conveyor 22 is an endless belt conveyor in which a large number of receiving jigs 23 for mounting, positioning and fixing the compact discs 15 are arranged.

The pad 14 is a pad for transferring adhesive applied to an intaglio (not shown). The outer diameter of the intaglio is 115mm.
, is made into a donut shape with an inner diameter of 15 mm and a depth of 25 μm. This means that the pattern layer 17 of the transfer film 16 is
The outer diameter is 120mm.

While the inner diameter is 15 mm, the outer diameter is 5 mm smaller. The pad 14 was made of sponge rubber and had a hemispherical shape.

A transfer film 16 is wound around the web 24, and pattern layers 17 are formed on the transfer film 16 at predetermined intervals. The transfer film 16 has a support of 25
A 2μm PET film is used, and a protective layer that also serves as a release layer is placed on one side using EB cure type acrylic resin.
The pattern layer 17 was printed with a four-color primary color plate on top of the pattern layer 17 printed to a thickness of m.

The transfer film 16 is guided by guide rollers 25, 26 and 27 to the conveyor 22 side.

A positioning sensor 28 is provided between the guide rollers 25 and 26, and detects the position of the pattern layer 17 on the transfer film 16. The output of this positioning sensor 28 is used as a synchronization signal for driving and controlling the conveyor 22, pad 14.degree. 18, and the like.

The compact disc 15 mounted on the receiving jig 23 and the picture layer 17 of the transfer film 16 are transported in synchronization, and the pad 18 is lowered in accordance with the timing. By pressing the pad 18, the picture layer 17 of the transfer film 16 is transferred onto the compact disc 15. The pad 18 is made of the same material and the same shape as the pad 14 described above, and the pressing force of the pad 14 is 40 kgf, whereas the pressing force of the pad 18 is 50 kgf.
As a result, a pressure difference was created between the pad 14 and the pad 18. At this time, the adhesive I2 spreads due to the pressure of the buckle 18, and its adhesive area is the same as that of the pattern layer 1 of the transfer film 16.
7, and the pattern layer 17 can be adhered without missing or uneven areas. At this time, tension is applied to the transfer film 16 by the nip roller 29.

As the conveyor 22 runs, the compact disc 15 is transported to the right side, but the transfer film 1G is guided upward at the nip roller 29, so the transfer film 1G
The picture layer 17 is peeled off from the compact disc 15, and the picture layer 17 is left on the surface of the compact disc 15.

The transfer film 16 from which the pattern layer 17 has been peeled is wound up by a winding roller 31 via an indoor roller 30.

The compact disc 15A with the pattern [17] is
It is sucked by the suction pad 32a of the carry-out arm 32 and placed on the mounting table 33.

A high-quality picture layer 17 was formed on the compact disc 15A, and no air bubbles were mixed in between the picture layer 17 and the picture layer 17. Moreover, the adhesive 12 did not protrude from the outer periphery of the pattern N11. Furthermore, no warpage or deformation of the compact disc 15A due to the transfer of the picture layer 17 was observed. The transfer time per sheet was 5 seconds, which was extremely high productivity.

〔Effect of the invention〕

As explained in detail above, according to claim (1), when the pattern layer is transferred from the transfer medium, air bubbles are not mixed in between the pattern layer and the adhesive layer, and the adhesive does not protrude from the pattern layer. . Furthermore, the transfer target no longer warps or deforms.

According to claim (2), in addition to claim (1), it is possible to accurately form the necessary adhesive layer on the transfer target.
More uniform and highly accurate transfer is possible.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams for explaining the gist of the transfer method according to the present invention. FIG. 3 is a diagram for explaining an embodiment of the transfer method according to the present invention. 1... Intaglio 2.12... Adhesive 3
...Doctor blade 4,14...Pad 5.
...Transfer object 15...Compact disc 6.16...Transfer film 7.17...Picture layer 8
．． 18... Pad 20. 33... Placement table 21... Supply arm 22... Conveyor 23
...Receiving jig 24...Web 25 26
．． 27.30... Guide roller 28... Positioning sensor 29... Nip roller 31... Winding up roller 32... Carrying out arm agent Patent attorney Sickle 1) Hisao (()) Figure ■ (b ) (C) (C1) Figure 2 (b) (C) (d)

Claims (2)

[Claims] (1) In a transfer method in which an adhesive layer is formed on a transfer target and a pattern layer of a transfer medium is transferred to the adhesive layer, the pattern layer of the transfer medium is superimposed on the adhesive layer of the transfer target, and A transfer method characterized in that the pattern layer is pressed and transferred from the transfer medium side using a convex pad while leveling the adhesive layer. (2) In a transfer method in which an adhesive layer is formed on the transfer target and a pattern layer of the transfer medium is transferred to the adhesive layer, an adhesive is applied to the intaglio surface, and an elastic convex pad is used to transfer the An adhesive is printed on the transfer object to form an adhesive layer having a shape that does not protrude from the pattern layer of the transfer medium, and the pattern layer of the transfer medium is superimposed on the adhesive layer of the transfer object, and an elastic layer is formed. A transfer method characterized in that the pattern layer is pressed and transferred from the transfer medium side using a convex pad while leveling the adhesive layer.