JP2001350412A - Photographic paper for thermal transfer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide photographic paper for thermal transfer which allows easy peeling of a release paper layer. SOLUTION: This photographic paper 30 for thermal transfer has a photographic paper layer 12 which has a sheet-like base material 16 and a dye receptive layer 20 disposed on one surface of the sheet-like base material 16 and the release paper layer 14 which has a back coating layer 26 on the extreme surface and is disposed across a tacky adhesive layer 18 on the other surface of the sheet-like base material 16. A corner part 32d at least at one point of the photographic paper 30 for thermal transfer is provided with a pseudo tacky adhesive layer 34 which is easier to peel than the tacky adhesive layer in place of the tacky adhesive layer. The release paper layer 14 may be easily peeled from the photographic paper layer 12 at the corner part 32d of the photographic paper for thermal transfer. The occurrence of distortion, wrinkling, rupture, etc., in the external form of the photographic original region like heretofore is therefore averted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer photographic paper, and more particularly to a thermal transfer photographic paper which facilitates the release of a release paper layer when the release paper layer is released from the thermal transfer photographic paper. The present invention relates to a thermal transfer photographic paper having a configuration that does not damage the photographic original area.

[0002]

2. Description of the Related Art In recent years, a so-called color print, in which a color is printed with a color using a color printer, has been developed.
Popular not only for business use but also for home use. An economical thermal color printer that has a thermal head as a printing mechanism and is relatively easy to maintain and is economical.Dye thermal transfer color printers that can print clear full-color images are attracting attention as easy and convenient color printers. ing.

In a thermal dye transfer type color printer, a thermal dye transfer receiving sheet, that is, a photographic paper for thermal transfer is fed so as to be superimposed on a dye ink ribbon of the thermal dye transfer type color printer, while a thermal head is used for printing information. Then, a predetermined area of the dye ink ribbon is heated.
As a result, the dye in the heated predetermined area in the dye ink ribbon is melted or sublimated and transferred to the dye receiving layer of the thermal transfer photographic paper at a predetermined density, whereby the image is printed on the thermal transfer photographic paper. Is done.

[0004] Here, with reference to FIG. 5, a configuration of a conventional thermal transfer printing paper will be described. FIG. 5 is a sectional view showing the structure of the thermal transfer printing paper. As shown in FIG. 5, the conventional thermal transfer printing paper 10 has a laminated structure of a printing paper layer (or a seal layer) 12 and a release paper layer 14. The photographic paper layer 12 includes a foamed PET sheet layer 16, an adhesive layer 18 provided on the lower surface of the foamed PET sheet layer 16 and functioning as an adhesive layer to the release paper layer 14, and a foamed PET sheet layer 1.
6, a dye receiving layer, ie, an image receiving layer 2 to be printed
0. The foamed PET sheet layer 16 is a base material of the photographic paper layer 12 and has a thickness of 60 μm.
m of expanded PET (Polyethylene Terephthalate) sheet. The image receiving layer 20 is formed by applying a layer obtained by adding a sensitizer to a synthetic resin agent to a thickness of about 7 μm on the foamed PET sheet layer 18.

The release paper layer 14 comprises a foamed PET sheet layer 22 provided as a base material, and a release layer 24 provided between the foamed PET sheet layer 22 and the adhesive layer 18 of the photographic paper layer 12.
And the back of the foamed PET sheet layer 22, that is, the release paper layer 14
Is formed as a laminated structure with the back coat layer 26 provided on the back surface of the substrate. The back coat layer 26 is formed on the image receiving layer 20 when the photographic paper for thermal transfer is overlapped during transportation or storage.
Is provided to protect and prevent damage, by dispersing an inorganic filler in a synthetic resin and further blending a lubricant such as silicone oil or fatty acid on the back surface of the foamed PET sheet layer 22. , Is formed.

In a thermal color printer, a photographic paper for thermal transfer having a predetermined standard size is usually used. In order to easily cut the photographic paper for thermal transfer when producing an original card or the like, for example, Japanese Patent Application Laid-Open No. 10-230
No. 686 discloses a plurality of regions 27 as shown in FIG.
To propose a thermal transfer photographic paper having a perforation 28 processed therein, and to easily separate a thermal transfer photographic paper having a standard size into a plurality of divided sheet pieces of a desired size along the perforations. It can be done. For example, perforation 28
Are provided through the photographic paper layer 12 of the photographic paper 10 for thermal transfer, as shown in FIG.

A color print obtained by printing an image or the like on a thermal transfer photographic paper of a predetermined standard size by a thermal color printer is cut into half-cut, that is, a business card size or a seal size by a perforation line. As a printed matter on which images full of originality are printed, it is widely used mainly by young people and is very popular.

[0008]

By the way, due to the nature of the original card and the original seal, it is necessary that the outer peripheral edge of the card and the seal be cut with a clean cross section. However, it is extremely difficult to separate the photographic paper layer from the release paper layer along the half cut line because the cut surface is a clean cross section. As a result, when the photographic paper layer is peeled from the release paper layer, distortion, wrinkles, tears, and the like are generated in the outer shape of the photographic document area of the original card or the like that has been sharply and colorfully printed in color, and the original card is used. There has been a problem that it is often impossible to do so and it is often necessary to discard it.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a thermal transfer printing paper for a thermal color printer capable of easily printing a clear full-color image or the like, and to enable a multipurpose use of a printed material mainly composed of a seal medium. It is an object of the present invention to provide a printing paper for thermal transfer, and in particular, to provide a printing paper for thermal transfer in which a release paper layer is easily peeled off.

[0010]

Means for Solving the Problems To achieve the above object, a thermal transfer printing paper according to the present invention comprises:
A photographic paper layer having a dye receiving layer provided on one surface of the sheet-like substrate, and a back coat layer on the outermost surface, provided on the other surface of the sheet-like substrate via an adhesive layer. In a thermal transfer photographic paper having a release paper layer, at least one of the four corners of the thermal transfer photographic paper or at least a part of the edge of the thermal transfer photographic paper, an adhesive layer is used instead of the adhesive layer. A quasi-adhesive layer that is easier to peel than a layer is provided.

In the present invention, a pseudo-adhesive layer that can be easily peeled off may be provided in place of the adhesive layer at all four corners of the thermal transfer printing paper. Alternatively, a pseudo-adhesive layer that can be easily peeled off may be provided at a plurality of corners instead of the adhesive layer. In addition, a pseudo-adhesive layer that is easily peelable may be provided instead of the adhesive layer over the entire edge of the thermal transfer photographic paper, and only an arbitrary part of the edge of the photographic paper layer may be easily peeled instead of the adhesive layer. A pseudo bonding layer may be provided.

In the present invention, since a pseudo-adhesive layer that can be easily peeled off is provided instead of the adhesive layer at the corners or edges of the thermal transfer photographic paper, the corners or edges of the thermal transfer photographic paper can be easily removed from the corners or edges. The release paper layer can be released from the photographic paper layer. Therefore,
Unlike the related art, there is no occurrence of distortion, wrinkles, tears, or the like in the outer shape of the printing document area of the printed thermal transfer printing paper.

In the present invention, there are no restrictions on the type, composition, etc. of the sheet-like base material, the dye-receiving layer, the adhesive layer, the back coat layer, etc., which constitute the photographic paper for thermal transfer. In addition, the pseudo adhesive layer is not limited in its kind and material as long as it is easy to peel off and has adhesiveness as compared with the adhesive layer, and is formed as, for example, a pressure-sensitive adhesive layer that is easy to peel off. Furthermore, a natural rubber compound can be used as a pressure-sensitive adhesive that can be easily peeled off. In a preferred embodiment of the present invention, perforations passing through the photographic paper layer are provided along cut lines of the photographic paper for thermal transfer.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 This embodiment is an example of the embodiment of the thermal transfer printing paper according to the present invention. FIG. 1 is a plan view of the thermal transfer printing paper of the present embodiment, and FIG. FIG. 2 is a cross-sectional view showing a configuration of the thermal transfer photographic paper of the embodiment along line II. The thermal transfer photographic paper 30 of the present embodiment is a conventional thermal transfer photographic paper except that at the corners or edges of the release paper layer, a pseudo adhesive layer that is easier to peel off than the adhesive layer is provided instead of the adhesive layer. Photographic paper 1
0 is provided.

As shown in FIG. 1, the thermal transfer printing paper 30 is provided with an image printing area 32a, a blank area 32b around the image printing area 32a, and a pseudo-adhesive layer which is easier to peel from the adhesive layer instead of the adhesive layer. A half cut perforation 32d is provided along the cut line around the image print area 32a (print document area).

At the corner 32c, as shown in FIG. 2, instead of the adhesive layer 18, the pseudo adhesive layer 3 which is easier to peel off than the adhesive layer 18 is formed.
4 are provided. That is, at the corner 32c of the thermal transfer photographic paper 30 of this embodiment, as shown in FIG. 2, similarly to the conventional thermal transfer photographic paper 10, the photographic paper layer (or seal layer) is provided.
12 and a release paper layer 14. The photographic paper layer 12 includes a foamed PET sheet layer 16 and a pseudo adhesive layer 34 provided on the lower surface of the foamed PET sheet layer 16.
And a dye receiving layer provided on the foamed PET sheet layer 16, that is, an image receiving layer 20 to be printed.

The foamed PET sheet layer 16 is
Of a foamed PET sheet having a thickness of 60 μm. The image receiving layer 20 is formed by applying a layer obtained by adding a sensitizer to a synthetic resin agent to a thickness of about 7 μm on the foamed PET sheet layer 18. Pseudo adhesive layer 34
Is formed as an easily peelable pressure-sensitive adhesive layer. When an acrylic adhesive is used as the adhesive layer 18, as the material of the easily peelable pressure-sensitive adhesive layer forming the pseudo adhesive layer 34, for example, natural Rubber-based rubber compounds can be used.

The release paper layer 14 comprises a foamed PET sheet layer 22 provided as a base material, and a release layer 24 provided between the foamed PET sheet layer 22 and the adhesive layer 18 of the photographic paper layer 12.
And the back of the foamed PET sheet layer 22, that is, the release paper layer 14
Is formed as a laminated structure with a back coat layer 26 provided as a back surface of the light emitting device. The back coat layer 26 is formed by dispersing an inorganic filler in a synthetic resin and further adding a lubricant such as silicone oil or fatty acid to the back surface of the foamed PET sheet layer 22.

The thermal transfer photographic paper 30 of the present embodiment has the same structure as the conventional thermal transfer photographic paper 10 except for the corners 32c.

In this embodiment, since the pseudo adhesive layer 34 which can be easily peeled off is provided at the corner 32c instead of the adhesive layer 18, the release paper layer 14 can be easily applied to the photographic paper layer 12 from the corner 32c.
Can be peeled off. Therefore, unlike the related art, distortion, wrinkles, tears, and the like do not occur in the outer shape of the printing original area of the printing paper for thermal transfer.

Embodiment 2 This embodiment is another example of the embodiment of the thermal transfer photographic paper according to the present invention, and FIG. 3 is a plan view of the thermal transfer photographic paper of this embodiment. Printing paper 4 for thermal transfer according to this embodiment
0, as shown in FIG. 3, an image print area 42a (print original area), a blank area 42b around the image print area 42a, and a corner 42c provided with the pseudo adhesive layer 34 instead of the adhesive layer 18. And a grid-shaped perforation line 42d is provided in the image printing area 42a. The corner 42c of the present embodiment has the same configuration as the corner 32c of the first embodiment. Therefore, the thermal transfer printing paper 40 of the present embodiment can provide the same effect as the thermal transfer printing paper 30 of the first embodiment.

Modification of Embodiment 1 This modification is a modification of Embodiment 1, and FIG. 4 is a plan view of a thermal transfer photographic paper of this modification. As shown in FIG. 4, the thermal transfer printing paper 50 of the present modified example has a pseudo-adhesive layer 3.
4 has the same configuration as that of the first embodiment except that a region 52 provided in place of the adhesive layer 18 is located at a part of the edge of the thermal transfer printing paper 50. Therefore, the thermal transfer printing paper 50 of the present modified example is different from the thermal transfer printing paper 30 of the first embodiment.
The same effect can be obtained.

[0023]

According to the present invention, the pseudo-adhesive layer which can be easily peeled off is provided at the corner or the edge of the thermal transfer photographic paper instead of the adhesive layer, so that the corner or the edge of the thermal transfer photographic paper is provided. Can easily peel the release paper layer from the photographic paper layer. Therefore, unlike the related art, there is no occurrence of distortion, wrinkles, tears, or the like in the outer shape of the printing original area of the printing paper for thermal transfer. Therefore, unlike the conventional case, when peeling off the seal, the outer shape of the print document area does not suffer from distortion, wrinkles, tears, etc., and the seal is easily peeled off. It can be used as a card or the like.

[Brief description of the drawings]

FIG. 1 is a plan view of a thermal transfer printing paper according to a first embodiment.

FIG. 2 is a cross-sectional view showing a configuration of the thermal transfer printing paper of the first embodiment along line II in FIG. 1;

FIG. 3 is a plan view of a thermal transfer printing paper according to a second embodiment.

FIG. 4 is a plan view of a printing paper for thermal transfer according to a modification of the first embodiment.

FIG. 5 is a cross-sectional view showing a configuration of a conventional thermal transfer printing paper.

FIG. 6 is a plan view showing an example of a thermal transfer printing paper with perforations.

FIG. 7 is a cross-sectional view of a thermal transfer photographic paper with perforations.

[Explanation of symbols]

10: conventional photographic paper for thermal transfer, 12: photographic paper layer (or seal layer), 14: release paper layer, 16: foamed PET
Sheet layer, 18... Adhesive layer, 20... Dye receiving layer, that is, image receiving layer to be printed, 22.
... release layer, 26 ... back coat layer, 27 ... area,
28 ... perforation, 30 ... thermal transfer photographic paper of Embodiment 1, 32a ... image printing area, 32b ... margin area, 32c ... corner, 32d ... perforation line, 34 ...
Pseudo-adhesive layer, 40... Photographic paper for thermal transfer of Embodiment 2;
42a: image printing area, 42b: blank area, 4
2c: corner portion, 42d: perforation line, 50: photographic paper for thermal transfer according to a modification of the first embodiment, 52: a region where a pseudo adhesive layer is provided instead of the adhesive layer 18.

Claims (4)

[Claims] 1. A photographic paper layer having a sheet-like substrate, a dye-receiving layer provided on one surface of the sheet-like substrate, and a back coat layer on the outermost surface, and the other of the sheet-like substrates And at least one of the four corners of the thermal transfer photographic paper, or at least one of the edges of the thermal transfer photographic paper, A printing paper for thermal transfer, characterized in that a pseudo-adhesive layer that is easier to peel off than the adhesive layer is provided instead of the adhesive layer. 2. The printing paper for thermal transfer according to claim 1, wherein the pseudo adhesive layer is formed as a pressure-sensitive adhesive layer which is easily peelable. 3. The photographic printing paper for thermal transfer according to claim 2, wherein a natural rubber compound is used as the pressure-sensitive adhesive which is easily peelable. 4. The thermal transfer paper according to claim 1, wherein a perforation penetrating through the photographic paper layer is provided along a cut line of the thermal transfer photographic paper. Photographic paper.