JPH057443U - Carrier sheet for flexographic printing - Google Patents

Abstract

(57) [Summary] [Purpose] Flexographic printing, in which air bubbles are less likely to be entrapped and can be easily removed even if air bubbles are entrapped, and the improvement of the thickness accuracy of the printing plate makes it possible to obtain printed matter with excellent printing quality. The purpose is to provide a carrier sheet. [Structure] The carrier sheet 1 is a synthetic resin film 2 in which a large number of circular holes 3 having a diameter of 0.5 to 5 mm are formed at a pitch of 10 to 30 mm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a carrier sheet for fixing a printing plate in flexographic printing.

[0002]

[Prior Art]

 Conventionally, in flexographic printing, a printing plate is fixed in advance to a carrier sheet made of a synthetic resin film such as polyamide or polyester by adhering with an adhesive or by applying a double-sided adhesive tape, and then this carrier sheet is used as a printing plate for a printing machine. It was attached to the body and printed.

However, recently, with respect to color multicolor printing and the like, it is required to improve the printing quality, so that the plate attached to the printing machine needs thickness accuracy, and the plate is fixed. In addition, the use of double-sided adhesive tape tends to increase.

However, when the printing plate is fixed by sticking the double-sided adhesive tape, air bubbles are apt to be caught between the double-sided adhesive tape and the carrier sheet during the sticking process, and the air bubbles entrap the thickness of the printing plate. There was a problem that the accuracy decreased. In addition, there is a problem that it is necessary to make a hole from the back surface of the carrier sheet with a needle or the like in order to remove the entrapped air bubbles, and it is necessary to repeat the pasting work.

[0005]

[Problems to be solved by the device]

 In view of the above-mentioned drawbacks, the present invention is such that bubbles are less likely to be entrapped when fixing a printing plate used for flexographic printing to a carrier sheet, and even if air bubbles are entrapped, it can be easily removed. An object of the present invention is to provide a carrier sheet for flexographic printing, which can obtain a printed matter with excellent printed quality by improving the thickness accuracy.

[0006]

[Means for Solving the Problems]

 The present invention is a carrier sheet made of a synthetic resin sheet or film mounted on a plate cylinder after fixing a plate in flexographic printing, and having a large number of circular holes having a diameter of 0.5 to 5 mm at a pitch of 10 to 30 mm. It is characterized by being drilled, and thereby the above-mentioned object is achieved.

The present invention will be described in detail below. The material used for the carrier sheet of the present invention is a sheet or film of polyvinyl chloride, polyethylene terephthalate (PET), stretched polypropylene (OPP), etc., which can be wrapped around the plate cylinder and other workability aspects. Therefore, the thickness is preferably in the range of 10 to 300 μm.

In the carrier sheet of the present invention, a circular hole penetrating from one side to the other side of the sheet or film is formed. If the size of the circular hole is small, there is no effect of removing bubbles, and conversely, if the size is large, the printing plate cannot be arranged at a uniform height and the thickness accuracy of the printing plate is reduced. Is limited to.

Further, since the shape of the holes formed in the carrier sheet is fixed by being pulled by a clamp when the carrier sheet is attached to the plate cylinder, a tear may occur from the edge portion. Expected, limited to circular.

When the number of the circular holes is small, there is no effect of removing bubbles, and conversely, when the number is large, the plate cannot be arranged at a uniform height and the thickness accuracy of the plate is reduced. It is necessary to drill at a pitch of 30 mm.

After the flexographic printing plate is fixed to the carrier sheet with a double-sided adhesive tape, the carrier sheet is mounted so as to be wound around the plate cylinder of the flexographic printing machine and printing is performed.

[0012]

[Action]

 According to the present invention, the circular holes formed in the carrier sheet prevent bubbles from being trapped during the work of fixing the printing plate to the carrier sheet, and the bubbles can be easily removed even when trapped. , Improve plate thickness accuracy.

[0013]

【Example】

 Embodiments of the present invention will be described below. (Embodiment) FIG. 1 is a sectional view of a carrier sheet showing an embodiment of the present invention.

In the figure, reference numeral 2 denotes a synthetic resin film used for a carrier sheet. As the synthetic resin film 2, a PET film having a thickness of 200 μm was used. Then, as shown in FIG. 2, a large number of circular holes having a diameter of 1 mm were bored at a pitch of 10 mm in the PET film by a rotary die cutter to prepare a carrier sheet 1.

When the printing plate was fixed to the produced carrier sheet 1 by using a double-sided adhesive tape, air bubbles did not engulf. The carrier sheet 1 was attached to a flexographic printing machine and printing was performed on the surface of a corrugated board. As a result, printing with excellent printed quality was obtained.

[0016]

[Effect of the device]

 As described above, the present invention uses a synthetic resin sheet or film having a large number of circular holes as the carrier sheet, so that air bubbles are less likely to be entrapped when the printing plate is fixed to the carrier sheet. Even if air bubbles are involved, it can be easily removed, which has the effect of improving the thickness accuracy of the printing plate and improving the printed quality of the printed matter.

[Brief description of drawings]

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

FIG. 2 is a plan view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Carrier sheet 2 Synthetic resin film 3 Circular hole

Claims (1)

[Claims for utility model registration] [Claim 1] A carrier sheet made of a synthetic resin sheet or a film, which is mounted on a plate cylinder after a printing plate is fixed in flexographic printing, having a circular hole with a diameter of 0.5 to 5 mm. Is formed in a large number at a pitch of 10 to 30 mm, and is a carrier sheet for flexographic printing.