JP2002149070A - Printing sheet with release sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing sheet with a release sheet which obviates occurrence of waving and curling on the printing sheet in spite of the small thickness of the printing sheet and the release sheet in printing, makes the printing sheet easily affixable and peelable when peeling the release sheet, does not produce wrinkles and air bubbles in affixation and is easily usable even with a reversing type printing machine of a small printing roll. SOLUTION: The release sheet 30 of the printing sheet with the release sheet formed by peelably affixing the release sheet 30 to a tacky adhesive surface 20 on the rear surface of the printing sheet 10 is formed of a foamed polyester resin sheet and a front surface 31 facing the tacky adhesive surface 20 of the printing sheet 10 is formed as a micro-rugged surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing sheet with a release sheet having a release sheet adhered to the adhesive surface on the back surface of the print sheet in a releasable manner.

[0002]

2. Description of the Related Art Conventionally, a printing sheet with a release sheet of this kind is apt to be wavy or curled by printing heat when the printing sheet or the release sheet is a thin sheet. Reversing printing presses with small rolls have drawbacks such as easy printing deviation due to the hardness of the release sheet, and the adhesive is applied to the entire back surface of the printing sheet. The sheet tends to wrinkle, air tends to remain between the adhesive surface on the back side of the printing sheet and the adherend,
There were drawbacks such as difficulty in peeling. Therefore, the present inventor
To solve the above problems by forming a micro-textured surface on the surface of the release sheet using a foamed polyester film that has high heat resistance and heat insulation, is more flexible than ordinary release sheets, and has high tensile strength. succeeded in.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a printing method which does not cause waving or curling on a printing sheet even when the printing sheet or release sheet is thin, and prints when the release sheet is peeled off. An object of the present invention is to provide a printed sheet with a release sheet that is easy to stick and peel, and that does not generate wrinkles or bubbles during sticking. Another object of the present invention is to provide a print sheet with a release sheet which is easy to use even in a reversing type printing press of a small printing roll.

[0004]

According to the present invention, there is provided a printed sheet provided with a release sheet according to the present invention, in which a release sheet 30 is releasably adhered to an adhesive surface 20 on the back surface of the print sheet 10 as shown in the drawing. In the printed sheet, the release sheet 30 is made of a foamed polyester resin sheet, and the surface of the print sheet 10 facing the adhesive surface 20 is formed as a fine uneven surface 31. Further, in order to achieve the above object, the printed sheet with a release sheet according to the present invention is, as shown in the figure, a printed sheet with a release sheet in which a release sheet 30 is releasably adhered to an adhesive surface 20 on the back surface of the printed sheet 10. The sheet 30 is made of a foamed polyester resin sheet, and the surface 31 facing the adhesive surface 20 of the printing sheet 10 is formed into a minute uneven surface to perform a non-adhesive treatment. In the present invention,
The printing sheet is made of a paper or a synthetic resin film in which a known adhesive is applied to the entire back surface. The release sheet is made of a foamed polyester resin film such as polyethylene terephthalate (hereinafter, referred to as PET) or the like, and the surface or the front and back surfaces of the film are made uneven. The non-adhesive treatment is not necessarily required.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIG. The print sheet with a release sheet according to the embodiment of the present invention includes the print sheet 10 and the release sheet 30. The printing sheet 10 is a PET film having a thickness of 50 microns,
A matting agent containing fine particles such as silica was thinly coated with a small amount of an antistatic agent on the front surface 11 in order to improve the adhesion to the toner, and an adhesive mainly composed of an acrylic resin or the like was applied to the entire back surface 12. An adhesive surface 20 is formed.
The release sheet 30 is a foamed polyester resin sheet having a thickness of 75 microns, the front surface 31 forms a fine uneven surface, and the back surface 32 is thinly coated with a small amount of an antistatic agent to improve running properties. I have. Since the printing sheet 10 and the release sheet 30 are pressure-bonded, the adhesive surface 2
0 forms an uneven surface corresponding to the uneven surface of the surface 31 of the release sheet 30. Moreover, since the release sheet 30 is a PET film and the surface 31 has a fine uneven surface, the release sheet 30 can be peelably adhered to the adhesive surface 20. Therefore, when the printing sheet with a release sheet of the present invention is printed (including copying), unlike the usual release paper or release sheet, the release sheet 30 is made of a foamed polyester resin sheet, and therefore has appropriate flexibility. High tensile strength makes it possible to print without displacement of the printing surface even with a reversing printing machine with a small printing roll.Moreover, since the heat resistance and heat insulation are large, even if the printing sheet is thin due to the heat of printing, it can be wavy or curled. No heat shrinkage occurs. Next, when the printing sheet 10 is peeled from the release sheet 30 and the adhesive surface 20 is adhered to the adherend, the adhesive surface 20 forms a minute uneven surface. No air bubbles are generated between the printing sheet 10 and the adhesive surface 20 of the printing sheet 10, no wrinkles are generated on the printing sheet 10, and even if air bubbles and wrinkles are generated, it is easy to reapply, so that it can be prevented immediately. Also, it can be easily peeled off.

[0006]

As described above, the present invention utilizes the flexibility, heat resistance, heat insulating properties, tensile strength, etc. of a release sheet to enhance the printing ability of a print sheet with a release sheet and release the release sheet. After that, it is possible to measure the ease of attaching the printing sheet from the uneven surface of the adhesive surface.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Printing sheet 20 Adhesive surface 30 Release sheet 31 Release sheet surface

Claims (2)

[Claims] 1. A printing sheet with a release sheet in which a release sheet is adhered to an adhesive surface on a back surface of the print sheet so that the release sheet can be peeled off, wherein the release sheet is a foamed polyester resin sheet and the surface facing the adhesive surface of the print sheet is A printing sheet with a release sheet, which is formed on a fine uneven surface. 2. A printing sheet with a release sheet in which a release sheet is releasably adhered to an adhesive surface on a back surface of the print sheet, wherein the release sheet is a foamed polyester resin sheet and the surface facing the adhesive surface of the print sheet is A printing sheet with a release sheet, wherein the printing sheet is formed on a micro uneven surface and subjected to a non-adhesive treatment.