JPH0480083A - Transfer method of transfer sheet for optical disk - Google Patents

Abstract

PURPOSE:To prevent the deformation such as warpage of a transfer sheet without heating an optical disk to high temp. by heating the transfer sheet to bond the same to the optical disk by a heat-sealable adhesive under pressure and subsequently peeling off a support from a surface protective layer. CONSTITUTION:A transfer sheet 2 is supplied from a supply roll 11 to be heated at first by a heating means 12. In this heating means 12, the transfer sheet 2 is heated to about 120 - 140 deg.C in a non-contact state on the side of the adhesive layer of the transfer sheet by a far infrared line heater or a thermocouple heater or in a contact state on the support side of the transfer sheet by a heating roll. Immediately after the transfer sheet 2 is heated by the heating means 12, the transfer sheet 2 is bonded to an optical disk 3 under such a condition that pressure is 5 kg/cm<2> and feed speed is 5 cm/sec by a pressure roller 13. After cooling, the support 21 peeled off by a peel roller 14 is taken up by a taking-up roll 15 and a pattern 2A is transferred to the optical disk 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transfer method for an optical disc transfer sheet suitable for forming a pattern on an optical disc, and in particular, a method for transferring a pattern without raising the temperature of the optical disc. The present invention relates to a method for transferring a transfer note for an optical disc.

[Prior Art] Optical discs can record large amounts of data at high density, so they are used not only as auxiliary storage media for video discs and digital audio discs, but also in mass filing systems for office automation. There is.

In conventional optical discs, the printing layer was screen printed using U-silk ink, so the printing layer was lackluster and the halftone reproducibility was poor, so there was a desire to improve the printing quality. In addition, moiré occurred between the screen mesh and the halftone dots, resulting in poor appearance. Furthermore, when printing on compact discs (CDs), it is necessary to perform a large amount of the same printing, and screen printing has poor productivity.

It would be possible to print using a method other than screen printing, but as described above printing is performed after forming a disc-shaped optical disc, direct offset printing or gravure printing is not possible. Although it is possible to perform direct offset printing using a proofing machine, it is difficult to control color density, the print quality varies widely, and it is extremely difficult to print in large quantities. Furthermore, since the disk that is the object to be printed is a circular plate, when performing multicolor printing, it is difficult to align the printing positions of each color, so-called registration (and there is a problem that printing accuracy decreases).

For this reason, a method of thermal transfer using a transfer sheet on which a heat-nol adhesive is precoated and dried is also beginning to be adopted, since transfer is easily possible using only a hot press.

FIG. 2 is a diagram showing an example of a transfer sheet for an optical disc;
FIG. 3 is a diagram showing a conventional example of the transfer method of the transfer sheet for optical discs.

The transfer cartridge 2 includes a sorted support 21, a surface-retaining a layer 22 removably formed on one side of the support 21, and
Image display 1' with a pattern reversely printed on one side of the surface protective layer 22! i23 and a heat-nol adhesive layer 24 formed on one side of the image display layer 23.

The support 21 is a mount for transfer, and is made of single sheet synthetic paper,
Release paper 1 Synthetic resin film, etc. can be used.

The surface protective layer 22 is a layer that prevents the image display layer 23 from fading due to friction, etc., and should be highly durable and have good press properties. - For boat fishing, acrylic resin varnish, etc. It is formed by a coating method or gravure printing. Note that by using the EB curable resin, it is possible to provide a more effective surface protection layer 22.

The surface protective layer 22 and the support 2■ need to be easily removable, and in order to give the surface protective layer 22 releasability,
Silicon etc. can be added. In addition, the support body 21
Alternatively, releasability can be improved by forming a release layer on the opposing surfaces of the surface protection layer 22.

The image display layer 23 is formed by reverse printing an image consisting of desired characters, figures, symbols, or a combination thereof in a single color or in multiple colors using colored ink by offset printing, gravure printing, primary color printing, inlux screen printing, etc. has been done. If necessary, a concealing layer can be provided on the image display layer 23 by printing or the like in order to conceal the glossiness of the optical disc 3.

The heat-sealable adhesive scraping layer 24 is a layer for adhering the image display layer 23 onto the optical disc 3, and adhesives such as acrylic and styrene/vinyl acetate copolymer agents can be used.

Optical discs 3 include playback-only discs such as video discs, audio discs (CDs), and CD-ROMs, write-once discs such as still image files, document files, computer backup memory, and computer data. The transfer sheet 2 includes any rewritable material such as a file, a moving image file, an audio disc, etc., and can be applied regardless of its size.As shown in FIG. roll 41
is supplied from the heating/pressure roller 42 to a temperature of 12
0°C2 pressure 5Kg/cm", feed speed 5cm/sec
It is adhered onto the optical disc 3 under these conditions.

After cooling, the support 21 peeled off by the peeling roller 44 is taken up by a take-up roll 45, and the pattern 2A is transferred onto the optical disc 3.

[Problem to be solved by the invention]

However, in the above-mentioned conventional transfer method for optical disc transfer sorting, the transfer temperature is high, so the optical disc 3 is heated by the heat during transfer, causing deformation such as warping, as shown in Figure 3. There was a possibility that it would become unplayable.

The purpose of the present invention is to prevent optical discs from being heated to high temperatures (
An object of the present invention is to provide a method for transferring a transfer sheet for an optical disk that does not cause deformation such as warping.

[Means to solve the problem]

In order to solve the above problems, the method for transferring a transfer sheet for an optical disc according to the present invention includes a sheet-like support, a surface protection layer removably formed on one side of the support, and a surface protection layer of the surface protection layer. An image display layer with a pattern reversely printed on one side,
In a method for transferring a transfer note for an optical disk, in which a transfer sheet consisting of a heat-sealable adhesive layer formed on one side of the image display layer is transferred to an optical disk, immediately before pressing the transfer sheet to the optical disk, the transfer sheet is transferred to the optical disk. After the transfer sheet is pressed onto the optical disk using the heat-sealable adhesive, the support is peeled off from the surface protection layer.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

FIG. 1 is a diagram showing an embodiment of a transfer method for an optical disk transfer sheet according to the present invention.

Note that the same reference numerals are given to parts that perform the same functions as those of the conventional example described above.

In this embodiment, the transfer sheet 2 is first heated by the heating means 12 after being supplied from the supply roll 11 .

This heating means 12 uses a far-infrared line heater, a thermocouple heater, etc. to heat the transfer sheet from the adhesive layer side in a non-contact manner.
Alternatively, the transfer sheet is heated to about 120 to 140° C. by contacting it from the support side with a heating roll or the like.

Immediately after heating with the heating means 12, the pressure roller 12
Pressure 5Kg/cm", feed speed 5cm/s e
The transfer sheet 2 is adhered onto the optical disc 3 under the conditions of c.

After cooling, the support 21 peeled off by the peeling roller 14 is taken up by a take-up roll 15, and the pattern 2A is transferred onto the optical disc 3.

The manufactured heritage transfer sheet 2 uses a 25 μm PET film as a support 21, and prints a 2 μm thick EB cured theacrylic resin on one side as a surface protection layer 22 that also serves as a release layer. A picture was stamped with an offset mark of ¥1 as the image display layer 23, and then a heat-sealable adhesive layer 24 was printed on the image display layer 23 by gravure printing using a gravure ink consisting of an adhesive mainly composed of acrylic resin.

After setting this transfer sheet 2 on the supply roll 11,
As the heating means 12, a far infrared line heater is used,
Immediately after heating at 120° C., pressing was performed using a pressure roller 13 at a pressure of 5 kg/cm” and a feed rate of 5 cm/sec.

After cooling on the line for about 10 seconds, the peeling roller 14
Only the support 21 was peeled off, and the support 21 was wound up with a winding roll 15.

On the optical disc 3, an adhesive N242 image display layer 231 is applied.
A pattern 2A made of the surface protective layer 22 was formed, and no deformation such as warpage due to heating was observed either immediately after manufacture or over time.

[Effects of the Invention] As explained in detail above, according to the present invention, the image display layer serving as the pattern is printed on the support in advance and the transfer sheet is transferred onto the optical disc, so registration etc. This eliminates the need for additional work, increases productivity, and improves the quality of the printed surface.

At this time, since only the transfer sort was heated immediately before pressurization, the optical disk did not become hot and deformation such as warping was prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of a method for transferring a transfer note for an optical disc according to the present invention. FIG. 2 is a diagram showing an example of a transfer sheet for an optical disc;
FIG. 3 is a diagram showing a conventional example of the transfer method of the transfer sheet for optical discs. 1... Transfer device 11... Supply roll 12
... Pressure means 13 ... Pressure roller 14 ... Peeling roller 15 ... Winding roll 2 ... Transfer sheet
21...Support 22...Surface protective layer 23.
...Image display layer 24...Heat-sealing adhesive layer 3...Optical disk agent Patent attorney Kama 1) Hisao

Claims (1)

[Claims] A sheet-shaped support, a surface protective layer removably formed on one side of the support, an image display layer with a pattern reversely printed on one side of the surface protection layer, and an image display layer formed on one side of the image display layer. In a method for transferring a transfer sheet for an optical disk, in which a transfer sheet consisting of a heat-sealable adhesive layer is transferred to an optical disk, only the transfer sheet is heated immediately before the transfer sheet is pressed onto the optical disk, and the heat-sealable adhesive layer is heated. A method for transferring a transfer sheet for an optical disk, characterized in that the support is peeled off from the surface protective layer after the transfer sheet is pressure-bonded to the optical disk using a sealing adhesive.