JP2005319659A - Single-piece printing paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide single-piece printing paper such as threefold postcard paper, which is excellent in transferability in printing and which is constituted by being coated with a releasable pressure sensitive adhesive. <P>SOLUTION: This threefold postcard paper 1 is constituted by applying the pressure sensitive adhesive 12, which does not ordinarily adhere, but can adhere when applied with predetermined pressure and which can be peeled off after adhesion, to the front sides of intermediate and lower paper pieces 6 and 7, serving as overlapping surfaces, and the backsides of upper and lower paper pieces 5 and 6. In the threefold postcard paper 1, printed parts 11 using medium ink are provided on the front side of the upper paper piece 5, except the overlapping surfaces coated with the pressure sensitive adhesive 12, the backside of the lower paper piece 7, and the front side and backside of a duplicate piece; and a coefficient of static friction between a surface printed in the medium ink, and a surface coated with the pressure sensitive adhesive is set to be in the range of 0.28-0.35 by measurement based on JIS P8147. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a single-piece printed paper, and in particular, a pressure-sensitive adhesive that can be bonded when a predetermined pressure is applied to a superposed surface provided on at least one side without being normally bonded and can be peeled after bonding is applied. It is related with the single piece printing paper which becomes.

Conventionally, this type of single-piece printing paper has been printed on at least one side, and then the overlapping surface provided with a pressure-sensitive adhesive is folded or overlapped, and then overlapped by a pressure roller or the like. A pressure is applied to bond the overlapping surfaces so that they can be peeled off. Then, the printing operation of the single piece printing paper is carried out by setting the single piece printing paper in an appropriately stacked state and setting it in the printer, and pulling out the single piece printing paper one by one from the uppermost stacked paper with the pulling roller and transporting it. It is common.
JP 2001-219679 A JP 2003-1971 A

  However, in the above-described conventional single-piece printing paper, the adhesive-coated surface has a large coefficient of friction, so that the smooth transfer operation is hindered when the paper is pulled out during the printing operation or during the subsequent transfer. And inconvenience that non-delivery is likely to occur. Incidentally, according to the test results by the present inventors, as shown in FIG. 4, the coefficient of static friction between the paper surfaces not subjected to any processing is 0.23 to 0.29 as measured according to JIS P8147. On the other hand, when the pressure sensitive adhesive described later was applied to the same paper, the static friction coefficient between the coated surfaces was 0.54 to 0.65 as measured according to JIS P8147. An object of the present invention is to provide a single-piece printing paper that eliminates the disadvantage caused by the large friction coefficient of the adhesive-coated surface.

  In order to achieve this object, the single-sided printing paper according to claim 1 of the present invention can be bonded when a predetermined pressure is applied to the overlapping surface provided on at least one side, usually without bonding, and after bonding, In a single-piece print paper obtained by applying a peelable pressure-sensitive adhesive, at least on the surface opposite to the superimposed surface on which the pressure-sensitive adhesive is applied, a printing portion using a medium ink is provided, The static friction coefficient between the medium ink printed surface and the pressure-sensitive adhesive coated surface is set to be 0.28 to 0.35 in the measurement according to JIS P8147.

  According to the single-sided printing paper according to claim 1 of the present invention, the single-sided printing paper is provided with a printing portion using a medium ink on at least the surface opposite to the overlapping surface to which the pressure-sensitive adhesive is applied. When the medium is stacked, the medium ink application surface and the pressure-sensitive adhesive application surface come into contact with each other, and the static friction coefficient of each contact surface is as low as 0.28 to 0.35 as measured according to JIS P8147. Since it is set, a smooth pulling out operation and transfer operation are possible.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments when the present invention is applied to a tri-fold postcard will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic plan view of a tri-fold postcard paper, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. It is a comparison table shown.

  As shown in FIG. 1, a tri-fold postcard paper 1 which is a single-piece print paper is formed by connecting a tri-fold postcard piece 2 and a holding piece 3 with a perforation 4 as a boundary, and the trifold postcard piece 2 Is formed by connecting the upper paper piece 5, the middle paper piece 6 and the lower paper piece 7 with the folding perforations 8 and 9, respectively. A postcard display 10 is printed in advance along the upper edge of the upper paper piece 5.

  The tri-fold postcard sheet 1 is printed with predetermined information on a predetermined portion of the front and back surfaces, and then the recording piece 3 is cut off by the perforation 4 for cutting, and the tri-fold postcard sheet 2 is formed on the upper sheet piece 5 shown in FIG. The postcard display 10 is folded in a zigzag manner with the folding perforations 8 and 9 so that the printed surface is exposed, and a predetermined pressure is applied so that the overlapped surface is peelably bonded to form a tri-fold postcard (not shown) ) Is used.

  As shown in FIGS. 2 and 3, on the surface side of the tri-fold postcard paper 1, the upper paper piece 5 and the recording piece 3 are subjected to solid printing 11 with a known medium ink made of a transparent varnish, while being overlaid. A pressure-sensitive adhesive 12 that can be peeled after bonding is applied to the middle paper piece 6 and the lower paper piece 7 that are the mating surfaces. Further, on the back side of the tri-fold postcard paper 1, the lower paper piece 7 and the recording piece 3 are subjected to solid printing 11 with medium ink, while the upper paper piece 5 and the middle paper piece 6, which are overlapping surfaces, are bonded to each other. A peelable pressure sensitive adhesive 12 is applied.

  The pressure-sensitive adhesive 12 can be printed and printed, for example, a non-peelable adhesive base that is pressure-sensitive and difficult to peel once adhered to the adhesive base. What mix | blends a state filler is suitable. The adhesive base may be a general pressure-sensitive adhesive. For example, natural rubber latex obtained by graft copolymerization of styrene and methyl methacrylate on natural rubber has anti-blocking properties. It is suitable in terms of heat resistance and wear resistance.

  On the other hand, as the fine particle filler, for example, zinc oxide, titanium oxide, calcium carbonate, kaolin, activated clay, spherical alumina, wheat starch, silica and the like are suitable. The peel strength of the overlapping bonded surface can be adjusted by the blending ratio of the fine particulate filler.

  Furthermore, as the above-mentioned medium ink, a commercially available general one can be used, and a colorless and transparent one is optimal for printing on two sides of a tri-fold postcard piece, but a colored and opaque one is used. In this case, it is desirable that the color is light.

  As shown in FIG. 4, a test piece made of a sheet that is the same as the tri-fold postcard sheet 1 and is not subjected to any processing, and a pressure-sensitive adhesive having the same configuration as the pressure-sensitive adhesive 12 is applied to the same sheet as the test piece. According to the measurement test of the coefficient of static friction performed in accordance with JIS P8147, using the test piece and the test piece obtained by applying the same amount of the same medium ink as the solid printing 11 on the same sheet as the test piece per unit area. When the medium-printed surface and the adhesive-coated surface are in contact with each other, the static friction coefficient is remarkably reduced to 0.28 to 0.35, compared to the case where the adhesive-coated surfaces are in contact with each other. It can be understood that the coefficient of static friction in the case of contact is approaching 0.23 to 0.29. The static friction coefficient is the ratio of the frictional force that tries to prevent the initial movement of the paper and the force applied perpendicularly to the paper.

  The tri-fold postcard paper 1 of this embodiment in which the static friction coefficient with the application surface of the pressure-sensitive adhesive 12 is set to 0.28 to 0.35 in accordance with JIS P8147 by the solid printing 11, and the recording piece 3 in the transport direction. When the front side was set in two printers (manufactured by Ricoh, NX750 and NX850) and printed 5000 sheets at a time, jamming and non-feeding occurred 6 times per 10,000 printed sheets. On the other hand, when the tri-fold postcard paper having the same configuration except that no medium ink is applied is set on two of the same printers and printed 5000 sheets at a time, the occurrence of jamming and non-feeding is 10,000 sheets. Was 35 times per print. Thus, it was confirmed that the tri-fold postcard paper 1 of this embodiment has extremely good transportability.

  In addition, this invention is not limited to the above-mentioned embodiment, For example, solid printing is performed with the medium ink 11 only on the front and back, or any one side of the copy piece 3 of the trifold postcard paper 1, or the copy piece 3 If there is not, solid printing 11 may be performed with medium ink on both or one of the front side of the upper paper piece 5 and the back side of the lower paper piece 7. In the case of a two-fold postcard, solid printing 11 is performed with a medium ink on the surface opposite to the overlapping surface on which the pressure-sensitive adhesive 12 is applied.

FIG. 3 is a schematic plan view of a tri-fold postcard paper. AA sectional view taken on the line AA of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 1. The comparison table which shows a friction coefficient measurement test result.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tri-fold postcard paper 2 Tri-fold postcard piece 3 Retaining piece 4 Cutting perforation 5 Upper paper piece 6 Middle paper piece 7 Lower paper piece 8,9 Folding perforation 11 Solid printing with medium ink 12 Pressure sensitive adhesive

Claims (1)

In a single-sided printing paper, a pressure-sensitive adhesive that can be bonded by applying a predetermined pressure to the overlapping surface provided on at least one side, usually without bonding, and which can be peeled after bonding is applied at least to the above-mentioned feeling. A printing part using a medium ink is provided on the surface opposite to the overlapping surface coated with the pressure adhesive, and the static friction coefficient between the medium ink printing surface and the pressure sensitive adhesive coating surface is measured in accordance with JIS P8147. Single-piece print paper, which is set to 0.28 to 0.35 at a maximum.

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