Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1999-03-16
2001-09-18
Crispino, Richard (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S234000, C156S235000, C156S240000, C156S241000, C156S247000, C156S289000, C427S146000, C427S147000, C427S148000, C428S914000
Reexamination Certificate
active
06290798
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method for preparing a printed product which is prepared by transferring a transfer layer of an intermediate transfer recording medium on which an image is formed, via a transferring adhesive layer, on a surface of a transfer-receiving material with an excellent adhesive property.
There have been known a method to prepare a printed product using an intermediate transfer recording medium. The intermediate transfer recording medium is hitherto used to form a printed product which is formed that an image is recorded on a receptor layer, then the receptor layer is transferred on a transfer-receiving material. On the receptor layer, since images are recorded by thermal transfer recording methods using a thermal transfer sheet, depending on a composition of materials, high quality images can be formed. Further, because a receptor layer may have an excellent adhesive property with a transfer-receiving material, or can be transferred to a transfer-receiving material via an adhesive layer with an satisfied adhesive property, this method is preferably used for a transfer-receiving material on which high quality images can not be formed directly because coloring materials hardly migrate to the transfer-receiving material, and which easily fuse and adhere to a coloring material layer during thermal transferring.
FIG. 12
shows a schematic sectional view of one example of a typical intermediate transfer recording medium. An intermediate transfer recording medium
101
is composed of a base film
102
and a transfer layer
112
which comprises at least a receptor layer
105
. On the receptor layer
105
, images
106
is formed through thermal transferring with a thermal-transferring sheet having a coloring material layer. The transfer layer
112
having the receptor layer
105
on which images
106
is formed, is separated from a base film
102
, and transferred on the transfer-receiving material, then images
106
as an objective are formed on the transfer-receiving material.
Through using such an intermediate transfer recording medium, high resolution and high quality images can be transferred and formed on a transfer-receiving material. Because the required images such as a letter and a photograph of one's face are formed on the transfer layer of the intermediate transfer recording medium in advance, then images can be formed on the transfer-receiving material by transferring, this method is superior to the others on the point in which the images can be easily formed on transfer-receiving material even if the images exist individually such as a booklet of a passport and a base material of a card, accordingly it uses preferably. Further, the images can be formed through that required matters such as a signature are entered or printed on a transfer-receiving material in advance, then a transfer layer formed images such as letters and pictures can be transferred from the intermediate transfer recording medium. Therefore, the intermediate transfer recording medium can be preferably used to form an identification document such as a passport, and a printed product such as a credit card, an ID card, and so on.
In this sort of thermal transfer method, a thermal transfer sheet, composed of a coloring material layer formed on a base film, and a transfer-receiving material on which a receptor layer is formed as occasion demands, are pressure-welded between a heating device such as thermal head and a platen roll, and heating portions of the heating device are selectively heated in accordance with an information of images to be transferred, so that a coloring material contained in the coloring material layer on the thermal transfer sheet is transferred on the transfer-receiving material thereby to record the images thereon. These thermal transfer methods are generally classified into a fusion thermal transfer method and a sublimation transfer method.
The fusion thermal transfer method is a method in which a thermal transfer sheet carrying a heat fusible ink layer is heated by the heating means of the type mentioned above and a softened heat fusible ink is transferred on a transfer-receiving material such as natural fiber paper or plastic sheet thereby to form an image on the transfer-receiving material. The heat fusible ink layer used in this method will be prepared by dispersing a coloring material such as pigment into a binder such as heat fusible wax or resin, and the heat fusible ink layer is carried by a base film such as plastic film. An image formed by this fusion thermal transfer method has an improved high density and sharpness, and hence, this method is more applicable to the recording of binary images such as letters or lines. Colored or multiple-colored images can be formed by using a thermal transfer sheet provided with heat fusible ink layers of yellow, magenta, cyan, black and the like and recording them on the transfer-receiving material.
On the other hand, the sublimation thermal transfer method is a method in which a thermal transfer sheet carrying a sublimation dye layer is heated by the heating means of the type mentioned above so as to sublimate the sublimation dye contained in the dye layer, and the dye is then transferred on a receptor layer formed on the transfer-receiving material, thus forming an image. The sublimation dye layer used in this method will be prepared by dissolving or dispersing the sublimation dye as coloring material into a binder such as resin, and the sublimation dye layer is carried by a base film such as plastic film. According to such sublimation thermal transfer method, since transferring amount of the dye can be controlled in dot unit in accordance with energy amount of the heating device such as thermal head, a gradation reproduction due to density modulation can be made possible. Furthermore, since the dye material is used as a coloring material, the thus formed image has a transparency, and hence, this method is superior to the reproduction of the intermediate colors at a time when a plurality of dye layers of a plurality of colors are transferred in an overlapped manner. For this reason, a full-colored image with high quality can be formed by transferring the sublimation dye of three or four colors of yellow, magenta and cyan, in addition to black, on the transfer-receiving material in an overlapped manner by using the thermal transfer sheet provided with sublimating dye layers of these three or four colors.
In these image forming methods, it is necessary particularly for the sublimation thermal transfer method that the transfer-receiving material on which an image is to be formed is provided with a dyeing property of the dye. Because of this reason, in a case where the surface of the transfer-receiving material has a less dyeing property, it is almost difficult to form an image on the transfer-receiving material as far as the receptor layer is provided thereon.
For example, the Japanese Patent Laid-open Publication No. SHO 62-264994 discloses a technique for providing a receptor layer on a transfer-receiving material having no dyeing property in a manner that a receptor layer transfer sheet formed by providing the receptor layer on a base film to be separable is preliminarily prepared and this receptor layer is transferred on the transfer-receiving material. According to this technique, a dye is transferred from a dye layer of a thermal transfer sheet to the receptor layer already transferred on the transfer-receiving material to thereby form an image.
Furthermore, in the Japanese patent Laid-open Publication No. SHO 62-238791 and the Japanese patent Laid-open Publication No. HEI 4-133793, there is disclosed a technique such that an intermediate transfer recording medium formed by providing the receptor layer on a base film to be separable is preliminarily prepared and an image is formed by transferring a dye from a thermal transfer sheet on this receptor layer. Thereafter, the receptor layer bearing the image is transferred to the transfer-receiving material by heating thus form
Kurokawa Shinichi
Onishi Jiro
Oshima Katsuyuki
Crispino Richard
Dai Nippon Printing Co. Ltd.
Ladas & Parry
Lorengo J. A.
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