JP6187565B2 - Pressure sensitive adhesive products - Google Patents

Description

  The present invention relates to a pressure-sensitive adhesive product that is bonded by applying pressure so that it cannot be bonded once peeled after bonding.

  Conventionally, a concealed postcard in which an inner information description surface is bonded with an adhesive is used so that it cannot be seen by others during delivery. In such a concealed postcard, a pressure-sensitive adhesive having a property that once opened, it does not adhere again under normal pressure is used (see Patent Documents 1 and 2).

JP 2009-196086 A JP 2010-143083 A

  In a pressure-sensitive adhesive product using a pressure-sensitive adhesive, such as the above-mentioned concealment postcard, a pattern may be printed with inkjet ink. In this case, the pressure-sensitive adhesive is applied to the surface of the pattern printed with the ink-jet ink on the pressure-sensitive adhesive side, so that the pattern with the ink-jet ink is protected. However, since the surface opposite to the pressure sensitive adhesive is not protected, when the pressure sensitive adhesive product is wound, the ink jet ink on the opposite side of the pressure sensitive adhesive is not sticky to the pressure sensitive adhesive. There is a problem that the ink is transferred to the pressure-sensitive adhesive side.

  Therefore, the present invention is intended to transfer the ink-jet ink on the surface not coated with the pressure-sensitive adhesive to the pressure-sensitive adhesive side when the pressure-sensitive adhesive product printed with the ink-jet ink is wound up. It is an object to provide a pressure-sensitive adhesive product that can be prevented.

  In order to solve the above problems, the pressure-sensitive adhesive product of the present invention is expressed by applying a pressure-sensitive adhesive to one side of a sheet-like base material, and the pressure-sensitive adhesive of the base material is applied. A pressure-sensitive adhesive product in which an ink-jet ink is applied to a non-printed side to form a printed layer, wherein a transparent varnish is applied to the outside of the ink-jet ink.

  According to the pressure-sensitive adhesive product of the present invention, since the transparent varnish was applied to the outside of the ink-jet ink applied to the side where the pressure-sensitive adhesive was not applied, the pressure-sensitive adhesive product printed with the ink-jet ink was used. When wound up, it is possible to prevent the inkjet ink on the surface not coated with the pressure-sensitive adhesive from being transferred to the pressure-sensitive adhesive side.

  Moreover, the pressure-sensitive adhesive product of the present invention is the pressure-sensitive adhesive product according to claim 1, wherein a second printed layer is formed by applying inkjet ink to the surface of the substrate opposite to the printed layer, The pressure-sensitive adhesive is applied to the surface of the second printed layer.

  According to the pressure-sensitive adhesive product of the present invention, since the inkjet ink is applied to both sides, it is possible to efficiently print both sides with the same inkjet ink.

  The method for producing a pressure-sensitive adhesive product includes a step of printing on one surface of a substrate with inkjet ink, and a step of applying a pressure-sensitive adhesive on the side of the substrate opposite to the surface printed with the inkjet ink. A step of drying the pressure sensitive adhesive, a step of applying a transparent varnish to the outside of the printed ink-jet ink by a flexographic printing machine, a step of drying the transparent varnish, and a pressure sensitive adhesive. Winding the continuous sheet-like base material into a roll, cutting the continuous sheet-like base material on which the pressure-sensitive adhesive is exposed into sheet units, and folding the product units And performing pressure bonding on the side to which the pressure-sensitive adhesive is applied.

  According to the method of manufacturing pressure-sensitive adhesive products, after printing with ink jet ink, pressure sensitive adhesive was applied to the opposite side, and transparent varnish was applied to the outside of ink jet ink. In addition, it becomes possible to efficiently produce a pressure-sensitive adhesive product that prevents the inkjet ink from being transferred to the pressure-sensitive adhesive side.

  According to the present invention, when the pressure-sensitive adhesive product printed with the ink-jet ink is wound, the ink-jet ink on the surface not coated with the pressure-sensitive adhesive is transferred to the pressure-sensitive adhesive side. It becomes possible to prevent.

It is the top view and sectional view of a pressure sensitive adhesive product concerning one embodiment of the present invention. It is a figure which shows the mode of manufacture by the manufacturing method of the pressure sensitive adhesive product which concerns on one Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a view showing a pressure-sensitive adhesive product according to the present invention. FIG. 1A is a plan view, and FIG. 1B is a cross-sectional view corresponding to AA in FIG.

  Fig.1 (a) is the top view which looked at the pressure sensitive adhesive product from the pressure sensitive adhesive layer 6 side, 2 shown with the dotted line has shown the folding line. The fold line 2 is a line for folding when the pressure-sensitive adhesive layers 6 are pressure-bonded, and can be formed by perforations or the like.

  In the pressure-sensitive adhesive product of this embodiment, as shown in FIG. 1B, printing layers 4 and 5 using inkjet ink are formed on both surfaces of the substrate 3, and a pressure-sensitive adhesive layer is formed on the upper layer of the printing layer 5. 6. A transparent varnish layer 7 is formed below the print layer 4. The fold line 2 is formed on the substrate 3.

  As the base material 3, depending on the purpose and characteristics of the product, for example, non-coated paper such as high-quality paper, medium-quality paper, lower grade paper, and colored high-quality paper, coating of art paper, coated paper, lightweight coated paper, etc. Paper, embossed paper, cast-coated paper, kraft paper, etc. can be appropriately selected and used.

  The pressure sensitive adhesive layer 6 is formed by applying a pressure sensitive adhesive. As the pressure-sensitive adhesive, known adhesives can be appropriately selected and used as long as they are bonded by applying pressure.

  The transparent varnish layer 7 is formed by applying a transparent varnish to the surface of the printing layer 4. As the transparent varnish, a known varnish can be appropriately selected and used as long as it can form a transparent film by performing a predetermined treatment.

  Next, the manufacturing method of the pressure sensitive adhesive product which concerns on one Embodiment of this invention is demonstrated. FIG. 2 is a product cross-sectional view showing a state of production by the method for producing a pressure-sensitive adhesive product according to the present embodiment. First, using a predetermined inkjet ink, the substrate 3 is printed with a pattern or the like to form the print layers 4 and 5. Thereby, as shown to Fig.2 (a), the printing layers 4 and 5 are formed in both surfaces of the base material 3. FIG. After the printing layer 5 is formed, information to be kept secret such as personal information is printed on the upper surface of the printing layer 5.

  Next, fold line processing is performed on the base material 3 on which the printed layers 4 and 5 are formed. In the present embodiment, the folding line processing is performed from the printed layer 5 side. Thereby, as shown in FIG.2 (b), the fold line 2 is formed in the printed layer 5 side of the base material 3. FIG. As long as the folding line 2 is an auxiliary line for folding, any processing mode may be used, and in this embodiment, the perforation is used.

  After the fold line processing is performed, next, a pressure sensitive adhesive is applied to the upper layer of the printing layer 5 and dried. Thereby, as shown in FIG.2 (c), the pressure sensitive adhesive layer 6 is formed on the printing layer 5. FIG.

  After the pressure-sensitive adhesive layer 6 is formed, a transparent varnish is applied to the surface of the printing layer 4 (the lower side in FIG. 2) and dried. Thereby, the transparent varnish layer 7 is formed in the lower layer of the printing layer 4 as shown in FIG.

  In the manufacturing method according to the present embodiment, as shown in FIG. 2 (d), after forming the transparent varnish layer 7 on the surface of the printing layer 4, the continuous sheet is wound up, so that the transparent varnish layer 7 is printed during winding. The layer 4 is protected, and the printed layer 4 does not directly contact the pressure-sensitive adhesive layer 6. For this reason, it becomes possible to prevent the inkjet ink of the printing layer 4 on the side where the pressure-sensitive adhesive is not applied from being transferred to the pressure-sensitive adhesive layer 6.

  After being rolled up, the rolled sheet is conveyed, cut into individual products, and separated. Thereafter, each product is folded from the fold line 2, the pressure-sensitive adhesive layers 6 are overlapped with each other, and pressure is further applied to adhere the pressure-sensitive adhesives of the opposing pressure-sensitive adhesive layers 6. Thereby, as shown in FIG.2 (e), adhesion is performed by making the printing layer 5 into the base material 3 inside. As a result, in the pressure-sensitive adhesive product 1, the printing layer 5 is hidden by the base material 3, and the printed information cannot be known from the outside.

<Example>
As the base material 3, 110 kg / 46 of Mitsubishi Paper IJ-S-G paper was used. Printing of the pattern and personal information for forming the printing layers 4 and 5 was performed by an ink jet printer Truepress Jet 520 manufactured by Dainippon Screen. The ink-jet ink was an aqueous pigment type, and after printing, the ink was dried with a hot roller at 80 ° C.

  The pressure-sensitive adhesive layer 6 was formed by applying a UV curable pressure-sensitive adhesive with a flexographic printing machine, followed by UV drying. As a UV curable pressure sensitive adhesive, a plus size OP-5250 made by Kyoto Chemical was used.

  The transparent varnish layer 7 was formed by applying a UV curable transparent varnish with a flexographic printing machine, followed by UV drying, as with the pressure-sensitive adhesive layer 6. As a UV curable transparent varnish, Dicure Clear UV-1601EM manufactured by DIC Graphics was used. The coating thickness of the transparent varnish is desirably 1 to 10 μm. If the coating thickness is less than 1 μm, the ink jet ink of the printing layer 4 cannot be completely prevented from being transferred to the pressure-sensitive adhesive layer 6. If the coating thickness exceeds 10 μm, the amount of transparent varnish is large. Thus, UV drying becomes worse, it becomes a state of raw drying, and causes sticking failure (blocking).

  After forming the transparent varnish layer 7, the roll-shaped sheet is cut and separated into individual product units, and the pressure-sensitive adhesive layers 6 are overlapped with each other at the fold line 2 by a folding machine and can be opened by pressure bonding. A pressure-sensitive adhesive product without transfer stain was created. The product manufactured by the method of the example was finished without any transfer of the ink-jet ink and no problem with opening after the press bonding.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the said embodiment, although the pattern and the character of the printing layer 5 were printed using inkjet ink, even if the pattern and the character of the printing layer 5 were printed by other methods, without using inkjet ink. good.

DESCRIPTION OF SYMBOLS 1 ... Pressure-sensitive adhesive product 2 ... Folding line 3 ... Base material 4, 5 ... Print layer 6 ... Pressure-sensitive adhesive layer 7 ... Transparent varnish layer

Claims (2)

Pressure sensitive adhesive is applied to one side of the base material and exposed, and ink jet ink is applied to the side of the base material not coated with the pressure sensitive adhesive to form a printing layer An adhesive product,
Apply a transparent varnish to the outside of the inkjet ink ,
The pressure-sensitive adhesive product is characterized in that a folding line for forming a concealing postcard is formed on the base material by folding and pressure-bonding the pressure-sensitive adhesives. Inkjet ink is applied to the surface of the substrate opposite to the printed layer to form a second printed layer, and the pressure-sensitive adhesive is applied to the surface of the second printed layer. The pressure-sensitive adhesive product according to claim 1 .

Images