JP6096549B2 - Pseudo adhesive sheet - Google Patents

Description

  The present invention relates to a pseudo-adhesive sheet that is releasably adhered by a pseudo-adhesive layer, and more particularly to a technique for improving ink fixability without reducing adhesive strength.

  Conventionally, in printed materials sent by mail such as direct mail, the information that the sender wants to notify the recipient has been printed on a predetermined paper as characters and images, most of which is enclosed and sealed in an envelope etc. , And sent to recipients as inclusions. In such an enclosure, when the recipient opens the envelope and views the printed matter enclosed in the envelope or the like, the recipient is notified of the information that the sender wants to notify.

  In recent years, postcards using a pseudo adhesive have been used. In this postcard, each of a plurality of connected postcard papers is coated with a pseudo-adhesive for releasably adhering the paper pieces, and then the postcard paper pieces are folded and pressurized to fold the postcard paper pieces. It is bonded in a peelable manner, and by using this postcard, a large amount of information can be notified in a compact manner.

  By the way, in the pseudo-adhesive sheet that is detachably bonded using the pseudo-adhesive like the postcard described above, it is necessary to improve the fixing property of the ink when printing information by inkjet. Therefore, for example, it is conceivable to form irregularities on the base sheet, but if the irregularities are formed on the base sheet, the pseudo-adhesive sinks into the base sheet due to the irregularities, and the adhesive strength decreases. End up.

  Here, a pigment layer is laminated on the base material sheet, an ink fixing layer is laminated on the pigment layer, information is printed by ink jetting from the pigment layer, and a pseudo adhesive is applied on the printed information. A technique for suppressing the sinking of the adhesive and improving the fixability of the ink has been considered, and is disclosed in Patent Document 1.

JP 2005-298994 A

  However, in the technique disclosed in Patent Document 1, depending on the type of ink or pseudo-adhesive, the compatibility with the pigment layer or the ink fixing layer does not match, so that the fixing property of the ink is impaired and the print quality decreases. There is a possibility that the adhesive force is reduced and inadvertent peeling occurs.

  The present invention has been made in view of the problems of the conventional techniques as described above, and is a pseudo-adhesive sheet that is detachably bonded by a pseudo-adhesive layer, regardless of the type of ink or pseudo-adhesive layer. Another object of the present invention is to provide a pseudo-adhesive sheet that can improve the fixability of the ink without reducing the adhesive force.

In order to achieve the above object, the present invention provides:
A pseudo adhesive layer is laminated on the coat layer laminated on the base sheet, and an information display portion on which information is printed by an inkjet is provided on a part of the coat layer, and the pseudo adhesive layer is overlaid. In the pseudo-adhesive sheet that is releasably bonded,
The coat layer is characterized in that the surface of the region where the information display portion is provided is subjected to uneven processing.

  In the present invention configured as described above, a pseudo-adhesion layer is laminated on the coating layer laminated on the base material sheet, and an information display section on which information is printed by inkjet is provided on a part of the coating layer. In this configuration, since the surface of the area where the information display part of the coat layer is provided has a concavo-convex process, the information display part does not decrease the adhesive force, and the information display part prints information by inkjet. The ink enters the unevenness due to the unevenness processing, and the fixability of the ink is improved.

  Specifically, it is possible to improve the fixability of the ink in the information display section by making the unevenness due to the uneven processing larger than the unevenness present on the surface of the area where the information display section of the coat layer is not provided. .

  Further, if the information display part is provided on at least a part of the peripheral edge part of the pseudo adhesive sheet, the pseudo adhesive layer does not sink into the coat layer at all in this region, and the adhesive force is improved and is not improved. Prepared peeling is suppressed.

  According to the present invention, in a pseudo-adhesive sheet that is detachably bonded by a pseudo-adhesive layer, the ink fixability can be improved without reducing the adhesive force, regardless of the type of ink or pseudo-adhesive layer. .

  In addition, in the area where the information display part is provided on at least a part of the peripheral edge of the pseudo adhesive sheet, in this region, the pseudo adhesive layer does not sink into the coat layer at all, and the adhesive force is improved. Inadvertent peeling can be suppressed.

It is a figure which shows 1st Embodiment of the pseudo | simulation adhesive sheet of this invention, (a) is a surface figure, (b) is A-A 'sectional drawing shown to (a). It is a figure for demonstrating the manufacturing method of the pseudo adhesive sheet shown in FIG. It is a figure which shows 2nd Embodiment of the pseudo adhesive sheet of this invention, (a) is a surface figure, (b) is A-A 'sectional drawing shown to (a). It is a figure which shows 3rd Embodiment of the pseudo | simulation adhesive sheet of this invention, (a) is a surface figure, (b) is A-A 'sectional drawing shown to (a).

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1A and 1B are diagrams showing a first embodiment of a pseudo adhesive sheet of the present invention, in which FIG. 1A is a front view and FIG. 1B is a cross-sectional view taken along line AA ′ shown in FIG.

  As shown in FIG. 1, the pseudo-adhesive sheet in this embodiment is configured by laminating a coat layer 20 on a base sheet 10 and further laminating a pseudo-adhesive layer 30 on the coat layer 20. The coat layer 20 and the pseudo-adhesion layer 30 are two paper pieces 2 and 3 that are foldably connected via the folding portion 4.

  As the base material sheet 10, paper such as high-quality paper, medium-quality paper, rough paper, cotton paper, various mechanical pulps such as PGM / GP / TMP, and waste paper pulp such as newspapers / flyers / magazines can be used. .

  The coat layer 20 is laminated by applying a coating liquid on the base sheet 10. The coating liquid is composed of a coating liquid composed of pigments, adhesives, auxiliary chemicals (dispersant and water resistance agent) and the like. As the pigment, it is conceivable to use clay having a particle diameter of 1 to 2 μm, calcium carbonate, titanium dioxide, satin white (a white pigment produced from aluminum sulfate and lime milk), or the like. The surface of the coat layer 20 originally has fine irregularities 22 due to the roughness of the surface of the base sheet 10 and the material of the coating liquid.

  The pseudo-adhesive layer 30 is peelably adhered by overlapping the pseudo-adhesive layers 30 and it is conceivable to use UV ink or aqueous emulsion paste. UV ink is roughly composed of an adhesive component and a curing component. As the adhesive component, it is conceivable to use rubber latex of styrene-butadiene rubber (SBR) or acrylonitrile-butadiene rubber (NBR) obtained by soap-free emulsion polymerization, acrylic resin latex such as polyacrylic acid ester, or the like. . As the curing component, it is conceivable to use an acrylic oligomer, an acrylic photopolymerizable monomer, a photopolymerization initiator, and the like.

  Further, a part of the coat layer 20 is provided with an information display unit 5 on which information is printed by applying the ink 40 by inkjet, and an area of the region where the information display unit 5 is provided. The surface is provided with unevenness 21 having a diameter and depth larger than the fine unevenness originally existing on the surface of the coat layer 20. That is, the unevenness 21 existing on the surface of the region where the information display unit 5 is provided has a larger diameter and depth than the unevenness 22 originally existing on the surface of the region where the information display unit 5 is not provided. ing.

  Below, the manufacturing method of the pseudo adhesion sheet 1 comprised as mentioned above is explained.

  FIG. 2 is a view for explaining a method of manufacturing the pseudo adhesive sheet 1 shown in FIG.

  First, the coating layer 20 is laminated | stacked on one surface of the base material sheet 10 by apply | coating the coating liquid as mentioned above (FIG. 2 (a)). At this time, fine irregularities 22 are originally present on the surface of the coating layer 20 due to the roughness of the surface of the base sheet 10 and the material of the coating liquid.

  Next, unevenness 21 having a diameter and depth larger than the unevenness 22 is formed by performing unevenness processing on a region of the surface of the coat layer 20 that becomes the information display unit 5 (FIG. 2B). It is conceivable that the uneven processing is performed by irradiating a region of the surface of the coat layer 20 that becomes the information display unit 5 with laser light or polishing the region. In addition, the uneven processing may be performed by pressing with a micro uneven roller or processing with a rotating roller wound with sandpaper.

  Next, the information display part 5 is provided by printing the information by applying the ink 40 to the area of the surface of the coat layer 20 to be the information display part 5 by inkjet (FIG. 2C). At this time, a region of the surface of the coat layer 20 where the information display unit 5 is provided is subjected to uneven processing, and the diameter and depth of the unevenness 21 by the uneven processing originally exist on the entire surface of the coat layer 20. Since it is larger than the fine irregularities 22, the ink 40 easily sinks into the coat layer 20, and the fixability is improved without being repelled on the surface of the coat layer 20.

  Thereafter, the pseudo adhesive layer 30 is laminated on the surface of the coat layer 20, and the pseudo adhesive sheet 1 shown in FIG. 1 is completed (FIG. 2D). Here, since the pseudo adhesive layer 30 contacts the surface of the ink 40 in the region where the information display unit 5 is provided, the ink 40 is prevented from sinking into the coat layer 20. Moreover, in the area | region where the information display part 5 is not provided, although the pseudo-adhesion layer 30 will contact | abut the coat layer 20, although the fine unevenness | corrugation 22 originally exists in this area | region, the information display part 5 Since the unevenness 21 by the unevenness processing is not provided as in the region provided with, the pseudo adhesive layer 30 hardly sinks into the coat layer 20. As a result, the surface of the coat layer 20 opposite to the base material sheet 10 can be laminated with a pseudo adhesive layer 30 having a thickness capable of exhibiting a desired adhesive force on the entire surface. When the sheet 1 is folded at the folding portion 4 and the paper piece portion 2 and the paper piece portion 3 are bonded, a desired adhesive force can be obtained.

  As described above, in the present embodiment, the surface of the area of the coat layer 20 where the information display unit 5 is provided is subjected to uneven processing, whereby the unevenness 21 larger than the unevenness 22 originally existing on the surface of the coat layer 20. Therefore, the fixability of the ink 40 in the information display unit 5 can be improved without reducing the adhesive force, regardless of the type of the ink 40 or the pseudo-adhesive layer 30.

(Second Embodiment)
3A and 3B are diagrams showing a second embodiment of the pseudo-adhesive sheet of the present invention, in which FIG. 3A is a surface view and FIG. 3B is a cross-sectional view taken along line AA ′ shown in FIG.

  As shown in FIG. 3, the pseudo-adhesive sheet in the present embodiment is uneven as shown in FIG. 1 by applying uneven processing to the peripheral portion 6 of the information display section 5 on the surface of the coat layer 20. The difference is that the unevenness 23 having the same diameter and depth as 21 is formed.

  In the pseudo-adhesive sheet 101 configured as described above, due to high-speed production or the like, the position accuracy during printing of unevenness or printing of information by ink jet is lowered, and the region where the ink 40 is applied is slightly shifted from the unevenness 21. Even in this case, the ink 40 sinks into the coat layer 20 due to the unevenness 23, and the fixing property of the ink is ensured.

(Third embodiment)
4A and 4B are diagrams showing a third embodiment of the pseudo-adhesive sheet of the present invention, in which FIG. 4A is a front view, and FIG. 4B is an AA ′ cross-sectional view shown in FIG.

  As shown in FIG. 4, the pseudo-adhesive sheet in this embodiment is different from that shown in FIG. 3 in the corner of the surface of the coat layer 20 that is a part of the peripheral edge of the pseudo-adhesive sheet 201. As a result of the concavo-convex processing, the concavo-convex 24 having the same diameter and depth as the concavo-convex 21 is formed, and the ink 40 is applied to this region regardless of the print design, and the information display unit 5 is provided. Is different.

  In the pseudo-adhesive sheet 201 configured as described above, no printing is performed and the information display unit 5 is not provided on the coat layer 20, or the print area is small, and only a small part of the coat layer 20 has information. Even in the case where the display layer 5 is not provided, the pseudo adhesive layer 30 does not sink into the coat layer 20 at all at the corners of the pseudo adhesive sheet 201 provided with the information display unit 5, Thereby, adhesive force improves and careless peeling can be suppressed irrespective of printing design. In addition, since the region is at least a part of the peripheral edge of the pseudo adhesive sheet 201, inadvertent peeling is less likely to occur. Further, when the unevenness 23 shown in the present embodiment and the second embodiment is present in the vicinity of the peripheral edge of the pseudo adhesive sheet 201, the ink 40 may not completely enter the unevenness 21 and 23. Even in this case, by providing the unevenness 24 and the information display unit 5 at the peripheral edge of the pseudo adhesive sheet 201, the ink 40 by the information display unit 5 enters the unevenness 24, and the above-described action occurs.

  The pseudo-adhesive sheet of the present invention is, for example, a postcard having confidentiality such as an information concealment sheet, personal information such as a notice, a card, or information that requires concealment performance of various information such as print information and print information. It can be used for a concealment sheet.

DESCRIPTION OF SYMBOLS 1,101,201 Pseudo-adhesion sheet 2,3 Paper piece part 4 Folding part 5 Information display part 6 Peripheral part 10 Base material sheet 20 Coat layer 21-24 Concavity and convexity 30 Pseudo-adhesion layer 40 Ink

Claims (3)

A pseudo adhesive layer is laminated on the coat layer laminated on the base sheet, and an information display portion on which information is printed by an inkjet is provided on a part of the coat layer, and the pseudo adhesive layer is overlaid. In the pseudo-adhesive sheet that is releasably bonded,
The pseudo-adhesive sheet according to claim 1, wherein the coat layer has an uneven surface formed on a surface of the area where the information display unit is provided. In the pseudo-adhesive sheet according to claim 1,
The unevenness | corrugation by the said uneven | corrugated process is a pseudo-adhesive sheet larger than the unevenness | corrugation which exists in the surface of the area | region in which the said information display part of the said coat layer is not provided. In the pseudo-adhesive sheet according to claim 1 or 2,
The information display unit is a pseudo adhesive sheet provided on at least a part of the peripheral edge of the pseudo adhesive sheet.

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