JP2006236914A - Blanket for letterpress reversing offset method printing, transcription roll, and manufacturing method of polymer electroluminescent element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blanket for a letterpress reversing off-set method printing and a transcription roll for printing wherein the blanket reaching usable limit is repeatedly usable without replacing all of it, and provide a manufacturing method of a polymer electroluminescent element using that blanket. <P>SOLUTION: This is the letterpress printing plate which is used when the polymer electroluminescent element is manufactured by the letterpress reversing off-set method, and which is composed by laminating a plurality of peelable silicon resin films. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a relief printing offset blanket for printing, a transfer roll for printing, and a method for producing a polymer electroluminescent device using the blanket, and in particular, it is not necessary to replace all blankets that have reached the use limit. The present invention relates to a relief printing offset printing blanket that can be used repeatedly, a printing transfer roll, and a method for producing a polymer electroluminescent device using the blanket.

  In recent years, development of polymer electroluminescent devices (also referred to as “organic electroluminescent devices”) in which a polymer light-emitting medium layer is provided between opposing electrodes has been promoted. As a manufacturing method suitable for mass production of the polymer electroluminescent device, for example, a relief reversal offset method has been proposed (for example, see Patent Document 1).

  In this method, first, ink made of a polymer light-emitting medium material is applied to the entire circumference of a silicone resin blanket of a printing transfer roll to form an ink layer. Next, a convex portion of a convex printing plate (also referred to as “removed plate”) that has been subjected to predetermined patterning is pressed against the blanket, and a part of the ink layer is transferred from the blanket to the convex portion.

  Thereby, an unnecessary ink layer on the blanket is removed, and a necessary ink layer is patterned and remains on the blanket. Next, the patterned ink layer is transferred from a blanket onto a substrate provided with an electrode to form a polymer light emitting medium layer, thereby producing a polymer electroluminescent device.

  In the above-described relief reversal offset method, 100% of an unnecessary ink layer is transferred and removed from a blanket to a relief printing plate, and 100% of the necessary ink layer is transferred from the blanket onto the polymer electroluminescent element substrate. It is requested.

  However, when the silicone resin blanket is used repeatedly, it swells with the solvent in the ink, the surface flatness deteriorates and the patterning accuracy of the ink layer decreases, and the silicone oil component is extracted from the blanket. There was a problem that the ink layer was difficult to peel off and the transfer efficiency from the blanket to the substrate was lowered.

For this reason, each time the blanket reaches the limit of use (also referred to as the “printing limit”), a new blanket was replaced on the transfer cylinder.
JP 2003-17248 A

  When changing the blanket above, (1) To prevent uneven coating during inking (ink application) and uneven printing pressure during transfer, make sure that no air bubbles enter between the transfer cylinder and the blanket. Therefore, it is necessary to pay attention to the point that the transfer cylinder and the blanket are completely brought into close contact with each other.

  (2) In order to match the rotation speed of the transfer cylinder with the movement speed of the stage on which the substrate is placed, the blanket thickness is accurately input to control the rotation speed of the transfer cylinder and the movement speed of the stage. It was also necessary to keep in mind that this was done.

  For this reason, it takes time to replace the blanket, and there is a problem that there is a large difference in replacement accuracy and work time depending on the skill level of the individual worker.

  In view of the above-mentioned problems of the prior art, the present invention provides a printing blanket, a printing transfer roll, and a printing roll using the blanket that can be used repeatedly without having to replace all blankets that have reached the use limit. It is an object of the present invention to provide a method for manufacturing a molecular electroluminescent device.

To solve this problem,
The invention according to claim 1 is a printing blanket used when producing a polymer electroluminescent device by a letterpress reverse offset method, wherein a plurality of peelable silicone resin films are laminated. Is a printing blanket for letterpress reverse offset printing.

  The invention according to claim 2 is a printing blanket used in manufacturing a polymer electroluminescent device by a letterpress reverse offset method, wherein a peelable silicone resin film is continuously wound in a spiral shape. A printing blanket for letterpress reversal offset printing.

  The invention according to claim 3 is characterized in that the silicone resin film is made of a crosslinkable silicone resin containing polydimethylsiloxane and has a thickness of 0.5 to 1 mm. Blanket for printing.

  According to a fourth aspect of the present invention, there is provided a relief printing offset printing method, wherein the relief printing offset printing blanket according to any one of claims 1 to 3 is provided on the entire peripheral surface of the transfer cylinder. It is a transfer roll.

  The invention according to claim 5 is characterized in that a polymer electroluminescent device is produced by a letterpress inversion offset method using the letterpress inversion offset printing blanket according to any one of claims 1 to 3. It is a manufacturing method of a polymer electroluminescent element.

  According to the present invention, by using a blanket in which a plurality of peelable silicone resin films are laminated, or a blanket continuously wound in a spiral shape, only a layer or a portion that has reached the use limit is peeled off, thereby removing the blanket. It can be used repeatedly without changing all, and the reworking time can be shortened.

  Hereinafter, an example of a relief printing offset blanket and a printing transfer roll according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic configuration diagram of a transfer roll 1 for letterpress reverse offset printing according to this embodiment.

  The printing transfer roll 1 includes a metal cylindrical drum type transfer cylinder 2 and a printing blanket 3. The blanket 3 is attached to the entire circumferential surface of the transfer cylinder 2, and the blanket 3 is rotated with the rotation of the transfer cylinder 2.

  The blanket 3 is formed by laminating a plurality of peelable silicone resin films. This silicone resin film is preferably a crosslinkable silicone resin containing polydimethylsiloxane as a main component from the viewpoint of facilitating peeling of the laminated silicone resin film.

  The silicone resin film preferably has a thickness of 0.5 to 1 mm, and more preferably 0.6 to 0.8 mm. By setting the thickness of the silicone resin film to 0.5 to 1 mm, even if the silicone resin film swells with the solvent in the ink, the deterioration of the surface flatness due to the swelling is small and the patterning accuracy of the ink layer is reduced. Can be prevented.

  The blanket 3 is preferably formed by laminating 2 to 5 layers of silicone resin films. By setting the number of stacked layers to 2 to 5, the blanket 3 can be used repeatedly without being replaced, and the blanket 3 can be prevented from coming into contact with the concave portion of the relief printing plate by applying printing pressure at the time of transfer.

  This silicone resin film is peelable for each layer. By peeling off the uppermost silicone resin film that has reached the limit of use and exposing the lower layer for use, the blanket 3 can be used repeatedly without being replaced.

  After repeated use, when the lowermost silicone resin film reaches the limit of use, it is necessary to replace it with a new blanket 3. Until then, the blanket 3 can be used simply by peeling the silicone resin film. Therefore, the number of reworking operations can be greatly reduced, and the reworking time can be shortened.

  Moreover, since it is only necessary to take care that no air bubbles enter between the transfer cylinder 2 and the blanket 3 only when the blanket 3 is replaced with a new blanket 3, the difference in accuracy for each replacement can be reduced. Further, conventionally, the thickness of the blanket is measured every time the tension is changed, and the measured value is input to the automatic rotating device of the transfer cylinder or the moving device of the stage to adjust the thickness. However, in the blanket 3 according to this embodiment, the peeling is performed. Since it is only necessary to input a numerical value obtained by subtracting the thickness of one layer of the silicone resin film, it is easy to adjust the distance between the transfer cylinder and the stage, the rotation speed of the transfer cylinder, and the like.

  In addition, since the blanket 3 is manufactured by pressing and laminating each layer of the silicone resin film, the adhesion between the layers is good, and when the transfer roll 1 is rotated and used, There is no inconvenience that causes delamination between layers. Further, when peeling one layer at a time, the silicone resin film can be easily peeled off, so that no peeling residue remains in the lower layer.

  In the present embodiment, the blanket 3 has a structure composed of only a multilayer laminate of silicone resin films, but a rubber blanket may be provided under the multilayer laminate.

  According to the transfer roll 1 according to the present embodiment, by using the blanket 3 in which a plurality of peelable silicone resin films are laminated, the layer reaching the use limit is peeled off, so that the blanket 3 can be repeatedly used without being replaced. It is possible to shorten the reworking time.

  The blanket 3 according to the present embodiment can be manufactured by laminating the above-mentioned silicone resin film, preferably heating and pressing and laminating. The transfer roll 1 can be manufactured by attaching a blanket 3 to the entire peripheral surface of the transfer cylinder 2.

[Second Embodiment]
Since the relief printing offset blanket according to this embodiment is the same as that of the first embodiment except that a peelable silicone resin film is continuously wound in a spiral shape, the description thereof is omitted. Is omitted.

  The silicone resin film is preferably wound continuously in a spiral shape about 2 to 5 times. By setting the number of windings to about 2 to 5 times, the blanket can be used repeatedly without re-stretching, and contact of the blanket with the concave portion of the relief printing plate due to the addition of printing pressure during transfer can be prevented.

  In this embodiment, it is possible to repeatedly use the blanket without changing the entire blanket by peeling off one turn of the outer side of the silicone resin film that has reached the use limit.

  The blanket according to this embodiment can be manufactured by winding the silicone resin film into a roll.

[Third Embodiment]
The method for producing a polymer electroluminescent device according to this embodiment uses the above printing blanket, and at least the hole transport layer or the high layer of the polymer electroluminescent device by the letterpress inversion offset method specifically described in the background art. Each constituent layer that requires patterning, such as a molecular light-emitting medium layer, is formed. The constituent materials and methods used in this manufacturing method are the same as the known manufacturing methods described in the background art.

  According to the method for producing a polymer electroluminescent device according to the present embodiment, by using the printing blanket, the difference in accuracy for each blanket replacement can be reduced, so that a reduction in patterning accuracy can be prevented, A polymer electroluminescent device with high dimensional accuracy can be obtained.

It is a schematic block diagram of the transfer roll for letterpress reverse offset method printing concerning this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer roll for letterpress reverse offset printing 2 Transfer cylinder 3 Blanket for letterpress reverse offset printing

Claims (5)

A printing blanket used when producing a polymer electroluminescent element by a letterpress reversal offset method,
A relief printing offset blanket comprising a plurality of peelable silicone resin films laminated. A printing blanket used when producing a polymer electroluminescent element by a letterpress reversal offset method,
A relief printing offset blanket, wherein a peelable silicone resin film is continuously wound in a spiral shape.   The relief printing reverse offset printing blanket according to claim 1, wherein the silicone resin film is made of a crosslinkable silicone resin containing polydimethylsiloxane and has a thickness of 0.5 to 1 mm.   A relief roll for offset printing, which is provided with the relief printing offset blanket according to any one of claims 1 to 3 on the entire peripheral surface of the transfer cylinder. A method for producing a polymer electroluminescent device, comprising producing a polymer electroluminescent device by a relief reversal offset method using the printing plate reversal offset printing blanket according to any one of claims 1 to 3. .

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