JP2017042988A - Crimped sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crimped sheet being stuck by that two connected sheets are folded and a predetermined pressure is applied, in which the sheets are reliably stuck together without producing a careless dirt around the crimped sheet.SOLUTION: A concealed postcard 1 is characterized in that a cover piece 10 and a backing sheet piece 20 are foldably connected through a folding part 30 and a predetermined pressure is applied to a surface becoming the inside in a folded state, and thereby a pressure sensitive adhesive layer 3 is stacked for sticking the cover piece 10 and the backing sheet piece 20. A microcapsule layer 5 containing microcapsule particles crushed when the predetermined pressure is applied to the end side opposite to the folding part 30 of the backing sheet piece 20 is stacked on the pressure sensitive adhesive layer 3, and a color developing layer 4 containing a developer developed by reacting with a color developer in the microcapsule layer 5 is stacked on the end side opposite to the folding part 30 of the cover piece 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pressure-bonding sheet that is attached by folding two connected sheet portions and applying a predetermined pressure.

  Conventionally, in a postcard provided with an information entry area for entering information, after the information is entered in the information entry area, a concealing portion is detachably pasted on the information entry area, thereby filling in the information. It is considered that the information entered in the area can be concealed. As such a postcard structure, for example, an information entry field for entering information to be concealed is provided on one side of the postcard, and a pressure sensitive adhesive is applied to the area where the information entry field is provided. It is considered that a postcard is folded after entering information to be concealed, and the folded regions are adhered to each other with a pressure sensitive adhesive.

  When transmitting information using this postcard, fold the postcard after filling in the information entry field with the information to be transmitted to the postcard destination, and attach the folded areas to each other with a pressure sensitive adhesive. Send the postcard to the destination. As a result, during the postcard transmission, the information entered in the information entry field is concealed and cannot be seen from the outside.

  By the way, when sticking sheets with a pressure-sensitive adhesive as described above, it is unclear how much pressure is applied to securely attach the sheets together. Therefore, the pressure applied varies depending on the operator, and if sufficient pressure is not applied to ensure that the sheets are stuck together, postcards, etc., will be peeled off by a postal sorting machine, etc. There is a possibility that the concealment information is seen from the outside.

  Therefore, in the information concealment sheet in which the two sheet parts are adhered to each other by applying a predetermined pressure, the applicant of the present application is on the surface opposite to the adhesion surface of at least one of the two sheet parts, An information concealment sheet having a pressure detection layer indicating that when a predetermined pressure is applied has been devised (see Patent Document 1). According to this information concealment sheet, when a predetermined pressure necessary for adhering the two sheet portions is applied to the sheet portion, the fact is indicated by the pressure detection layer, whereby the two sheet portions are pasted. When attaching, the pressure required for sticking can be applied, and sheets can be reliably stuck together.

Japanese Patent No. 4728817

  As the pressure detection layer as described above, a layer using a coloring means that develops color when a predetermined pressure is applied can be considered. For example, a color developer comprising a microcapsule layer comprising a microcapsule particle comprising a color former and being crushed when a predetermined pressure is applied, and a developer that develops color by reacting with the color former constituting the microcapsule particle One that consists of layers is conceivable. In this way, when using a device that uses color developing means that develops color when a predetermined pressure is applied, it is possible to recognize whether the pressure required for sticking has been applied by checking the color development state. be able to.

  By the way, the information hiding sheet mentioned above can be used for postcards. In that case, depending on the handling method, pressure may be applied to the pressure detection layer during postcard delivery, such as a mail sorting machine. Then, in the case of using the coloring means as described above as the pressure detection layer, since the pressure detection layer is provided on the surface opposite to the sticking surface of the sheet portion, depending on the material of the coloring means, There is a possibility that the postal sorting machine or other postal items may become dirty due to the color of the pressure detection layer.

  In the pressure-bonded sheet that is adhered by folding two connected sheet portions and applying a predetermined pressure, the sheet portions can be reliably connected without causing inadvertent dirt around the pressure-bonded sheet. It aims at providing the crimping | compression-bonding sheet | seat which can be stuck.

In order to achieve the above object, the present invention provides:
The first sheet part and the second sheet part are connected to each other via a folding part so as to be foldable, and a predetermined pressure is applied to the inner surface in the folded state, whereby the first sheet part and the second sheet part are connected. In the pressure-bonded sheet formed by laminating the adhesive layer for adhering the two sheet portions,
Color develops by applying the predetermined pressure to the end of the first sheet portion and the second sheet portion on the opposite side of the folded portion on the surface where the adhesive layer is laminated. It has a coloring display layer.

  In the present invention configured as described above, when the first sheet portion and the second sheet portion are folded at the folding portion and a predetermined pressure is applied, they are stacked on the inner surface in the folded state. The first sheet portion and the second sheet portion are attached by the adhesive layer formed, and the color display layer is colored by applying a predetermined pressure, and the color development state of the color display layer is confirmed. Thus, it is possible to recognize whether or not the pressure necessary for adhering the first sheet portion and the second sheet portion is applied. At this time, the color display layer is provided on the surface of the first sheet portion and the second sheet portion on which the adhesive layer is laminated, so that the outer surface of the pressure-bonded sheet is folded. Thus, when the color display layer is colored, the color does not cause inadvertent staining around the pressure-bonded sheet.

  A color-developing layer provided on an end opposite to the folded portion of the first sheet portion, and containing a color-developing agent that is crushed by applying a predetermined pressure; and a second sheet portion If it comprises a developer layer that is provided on the opposite side of the fold portion and contains a developer that develops color by reacting with the crushed color former, the first sheet portion and the second sheet portion In a state where the sheet part is not folded at the folding part, even when pressure is applied to the pressure-bonding sheet, the color display layer does not develop color, so printing on the first sheet part or the second sheet part is possible. For example, when the printing is performed, it is possible to prevent the color display layer from being erroneously colored during manufacture.

  According to the present invention, when a predetermined pressure necessary for adhering the first sheet portion and the second sheet portion with the adhesive layer is applied, the color display layer is colored, and the color development state is confirmed. Thus, it is recognized whether or not the pressure necessary for adhering the first sheet portion and the second sheet portion is applied. This color display layer is the first sheet. By being provided on the surface on which the adhesive layer is laminated, at least one of the portion and the second sheet portion, it is not exposed on the outer surface in the folded state of the pressure-bonding sheet, thereby the pressure-bonding sheet The sheet portions can be reliably adhered to each other without causing inadvertent staining due to the color display layer.

  A color-developing layer provided on an end opposite to the folded portion of the first sheet portion, and containing a color-developing agent that is crushed by applying a predetermined pressure; and a second sheet portion The first sheet portion and the first sheet portion are provided on the side opposite to the folded portion of the first and second color layers containing a developer that develops color by reacting with the crushed color former. In the state where the sheet portion of 2 is not folded at the folding portion, even when pressure is applied to the pressure-bonding sheet, the color display layer does not develop color, so the first sheet portion or the second sheet portion When performing printing or printing, it is possible to avoid the color display layer from being erroneously colored during manufacture.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the crimping | compression-bonding sheet | seat of this invention, (a) is a figure which shows the structure of the sticking surface of a cover-sheet piece and a back paper piece, (b) is the opposite side to an sticking surface. The figure which shows the structure of a surface, (c) is AA 'sectional drawing shown to (a). It is a figure for demonstrating the usage method of the concealment postcard shown in FIG. It is a figure for demonstrating the effect | action by the concealment postcard shown in FIG. It is a figure which shows 2nd Embodiment of the crimping | compression-bonding sheet | seat of this invention, (a) is a figure which shows the structure of the sticking surface of a cover-sheet piece and a back paper piece, (b) is the opposite side to an sticking surface. The figure which shows the structure of a surface, (c) is AA 'sectional drawing shown to (a). It is a figure for demonstrating the usage method of the concealment postcard shown in FIG. It is a figure for demonstrating the effect | action by the concealment postcard shown in FIG.

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

(First embodiment)
FIG. 1 is a diagram showing a first embodiment of a pressure-bonding sheet according to the present invention, in which (a) is a diagram showing a configuration of an adhesive surface between a cover piece 10 and a backing paper piece 20, and (b) is an adhesive. The figure which shows the structure of the surface on the opposite side to a surface, (c) is AA 'sectional drawing shown to (a).

  As shown in FIG. 1, the pressure-bonding sheet in this embodiment has a backing paper piece 20 serving as a first sheet portion and a cover sheet piece 10 serving as a second sheet portion connected in a foldable manner via a folding portion 30. The concealment postcard 1 is

  The backing paper piece 20 is coated on the entire surface of the attachment surface with the cover piece 10 by an adhesive having a self-adhesive property that allows only self-adhesion and subsequent peeling by pressure, and a writing property thereon. Thus, the pressure-sensitive adhesive layer 3 is laminated. Further, on the end opposite to the folded portion 30, a microcapsule is formed of a color former and becomes a color development layer in which microcapsule particles that are crushed when a predetermined pressure is applied are dispersed in an oil varnish for ink. Layer 5 is laminated on pressure sensitive adhesive layer 3. Thus, the microcapsule layer 5 is laminated on the pressure-sensitive adhesive layer 3, so that the microcapsule layer 5 also serves as a so-called paste-kill printing, whereby the edge of the backing paper piece 20 on the side opposite to the folded portion 30. The adhesive strength of is weak compared to other areas. The degree of decrease in the adhesive force due to the microcapsule layer 5 is appropriately set according to the application, but the thickness of the microcapsule layer 5 is adjusted, or the microcapsule layer 5 is formed on the pressure-sensitive adhesive layer 3 with halftone dots It can be set by laminating in a shape. As described above, the microcapsule layer 5 also serves as paste printing, so that even when the microcapsule layer 5 is not colorless and transparent, the design property on the bonding surface of the backing paper piece 20 to the cover piece 10 by the microcapsule layer 5. Is prevented from being damaged. In addition, the structure which pastes and prints on the pressure sensitive adhesive layer 3 in the edge side on the opposite side to the folding part 30 of the backing paper piece 20, and laminates | stacks the microcapsule layer 5 on it may be sufficient. Further, on the surface of the backing paper piece 20 on which the pressure-sensitive adhesive layer 3 is laminated, the notification information 21 to be notified to the provider of the concealing postcard 1 is printed on the area where the microcapsule layer 5 is not laminated. . The notification information 21 may be printed before the pressure-sensitive adhesive layer 3 is laminated on the postcard substrate 2 or may be printed together with paste printing such as the microcapsule layer 5.

  The cover sheet piece 10 has the pressure-sensitive adhesive layer 3 laminated thereon by applying the same adhesive as that of the back paper piece 20 on the entire surface of the postcard substrate 2 to which the back paper piece 20 is attached. Further, at the end opposite to the folded portion 30, the color developing layer 4 containing a color developing agent that reacts with the color developing agent in the microcapsule layer 5 in the ink is a pressure-sensitive adhesive layer. 3 are stacked. The color developing layer 4 is thus laminated on the pressure-sensitive adhesive layer 3 so that the color developing layer 4 also serves as so-called paste-killing printing, whereby the edge of the backing paper piece 20 on the side opposite to the folded portion 30 is obtained. The adhesive strength of is weak compared to other areas. The degree of decrease in the adhesive strength by the color developing layer 4 is appropriately set according to the application, but the thickness of the color developing layer 4 is adjusted, or the color developing layer 4 is halftone dot on the pressure sensitive adhesive layer 3. It can be set by laminating in a shape. As described above, the color developing layer 4 also serves as paste-killing printing, so that even when the color developing layer 4 is not colorless and transparent, the design property on the bonding surface of the cover piece 10 to the back paper piece 20 by the color developing layer 4. Is prevented from being damaged. In addition, the structure which pastes and prints on the pressure sensitive adhesive layer 3 in the edge side on the opposite side to the folding part 30 of the cover piece 10, and laminates the color developing layer 4 on it may be sufficient. Further, in the surface of the cover sheet 10 on which the pressure-sensitive adhesive layer 3 is laminated, in the area where the developer layer 4 is not laminated, the concealment information for entering the concealment information at the destination of the concealment postcard 1 is entered. A column 11 is provided. Further, on the surface opposite to the surface on which the pressure sensitive adhesive layer 3 of the cover piece 10 is laminated, the address, name, etc. of the address of the concealment postcard 1 in which the concealment information is entered in the concealment information entry column 11 Information 12 is printed.

  The microcapsule layer 5 and the color developing layer 4 constitute a color display layer in the present invention.

  Below, the usage method of the concealment postcard 1 comprised as mentioned above is demonstrated.

  FIG. 2 is a diagram for explaining a method of using the concealment postcard 1 shown in FIG.

  When the concealment postcard 1 shown in FIG. 1 is used, first, as shown in FIG. 2A, the concealment information entry column 11 provided on the surface of the cover piece 10 on which the pressure-sensitive adhesive layer 3 is laminated is entered. The concealment information 11a to be notified to the destination of the concealment postcard 1 is entered. At this time, in the concealment information entry column 11, the pressure-sensitive adhesive layer 3 is laminated on the postcard substrate 2, but the adhesive constituting the pressure-sensitive adhesive layer 3 has writability as described above. Therefore, the concealment information 11 a can be entered in the concealment information entry column 11. It is also conceivable to print the concealment information 11a by a printer or the like instead of entering the concealment information 11a in the concealment information entry column 11. Further, since the adhesive constituting the pressure-sensitive adhesive layer 3 has a self-adhesive property that only the self can be attached as described above, the cover piece 10 and the back piece 20 are connected via the folding part 30. In the unfolded state, even if the surface is sticky or comes into contact with other articles, it does not stick to it.

  Then, as shown in FIG.2 (b), the postcard base material 2 is folded in the folding part 30 so that the surface where the pressure sensitive adhesive layer 3 was laminated | stacked may become inside. Then, the concealment information 11a entered in the concealment information entry column 11 is concealed, and as shown in FIG. 2 (c), the feeling that the cover piece 10 and the back piece 20 are laminated on the postcard base material 2 respectively. The pressure bonding layer 3 comes to face. Here, since the adhesive constituting the pressure-sensitive adhesive layer 3 has a self-adhesive property that only the self can be attached as described above, the pressure-sensitive adhesive layer 3 of the cover piece 10 and the backing paper piece 20 By facing each other, the cover sheet piece 10 and the backing paper piece 20 are adhered by the pressure-sensitive adhesive layer 3. It should be noted that the cover piece 10 and the backing paper piece 20 are each subjected to paste printing by the developer layer 4 or the microcapsule layer 5 or the like on the side opposite to the folded portion 30, so that the cover piece 10 or Although the adhesive strength is weaker than that of the other area of the backing paper piece 20, since the adhesive strength is not absent, the cover piece 10 and the backing paper piece 20 are adhered by the pressure-sensitive adhesive layer 3 also in this area. Will be.

  Here, in order to securely attach the cover sheet piece 10 and the backing paper piece 20 with the pressure-sensitive adhesive layer 3, it is necessary to apply a predetermined pressure in a direction in which the folded cover sheet piece 10 and the backing paper piece 20 are sandwiched. . That is, after the postcard substrate 2 is folded at the folding portion 30 as described above, if the cover sheet piece 10 and the backing paper piece 20 are securely attached to each other, the concealment postcard is not applied. During the delivery of 1, the cover piece 10 and the back piece 20 may be peeled off by a mail sorting machine or the like, and the concealment information 11a may be seen from the outside.

  FIG. 3 is a diagram for explaining the operation of the concealment postcard 1 shown in FIG.

  In the concealment postcard 1 shown in FIG. 1, after the postcard substrate 2 is folded at the folding portion 30, sufficient pressure is not applied to ensure that the cover piece 10 and the backing paper piece 20 are adhered. In this case, the microcapsule particles contained in the microcapsule layer 5 are not crushed, and as a result, as shown in FIG. 3A, the region where the developer layer 4 of the cover piece 10 is laminated does not change color.

  On the other hand, after the postcard substrate 2 is folded at the folding portion 30, when sufficient pressure is applied to ensure that the cover piece 10 and the backing paper piece 20 are adhered, it is contained in the microcapsule layer 5. The formed microcapsule particles are crushed by the pressure, and the developer contained in the developer layer 4 reacts with the color former in the microcapsule particles, thereby developing the color as shown in FIG. Layer 4 will develop color.

  As described above, the concealment postcard 1 and the postcard base material 2 in the present embodiment are folded at the folding portion 30 so that the surface on which the pressure-sensitive adhesive layer 3 is laminated is inside, and then the cover piece 10 and the backing paper piece. When a sufficient pressure is not applied to securely adhere to the cover 20, the area where the color developing layer 4 of the cover piece 10 is laminated does not change color, while the cover piece 10 and the backing paper piece 20 When a sufficient pressure is applied to ensure that the developing layer 4 is securely applied, the color developing layer 4 will develop color, so that the cover piece 10 and the backing paper piece 20 are attached as described above. The region where the color developing layer 4 is laminated is partially peeled to check the color development state of the color development layer 4, and the cover piece 10 and the back paper piece 20 are securely attached according to this color development state. Therefore, it can be recognized whether sufficient pressure is applied. At this time, in the region where the color developing layer 4 is laminated, the paste is printed by the color developing layer 4, the microcapsule layer 5, etc., so that it is compared with the other regions of the cover piece 10 and the backing paper piece 20. Since the adhesive force is weak, it is easy to partially peel the region where the color developing layer 4 is laminated. In addition, in order to confirm the color development state of the color development layer 4, it is necessary to make the color of the paste printing by the microcapsule layer 5 and the color development layer 4 different from the color in the color development state of the color development layer 4. is there.

  In such a configuration, the microcapsule layer 5 and the color developing layer 4 constituting the color display layer are formed on the pressure-sensitive adhesive layer 3 laminated on the postcard substrate 2, that is, the postcard substrate 2 is folded. Since the microcapsule layer 5 and the developer layer 4 are laminated on the inner surface when folded at 30, the postcard substrate 2 is folded on the outer surface when folded at the folding portion 30. When the color developing layer 4 is colored as described above, the colored layer 4 may cause inadvertent dirt around the concealing postcard 1 such as a mail sorting machine or other postal matter. There is no.

  In addition, the color display layer is provided on the side opposite to the folded portion 30 of the backing paper piece 20 and the microcapsule layer 5 provided on the side opposite to the folded portion 30 of the cover sheet piece 10. When a predetermined pressure is applied in a state where the postcard substrate 2 is folded at the folding portion 30, the microcapsule particles contained in the microcapsule layer 5 are crushed, and the developed layer Since the developer contained in 4 reacts with the color former in the microcapsule particles and the developer layer 4 develops color, in a state where the postcard substrate 2 is not folded at the folding portion 30, Even when pressure is applied to the concealing postcard 1, the microcapsule layer 5 and the color developing layer 4 are not colored. For this reason, the microcapsule layer 5 and the color developing layer 4 are erroneously colored during manufacturing, such as when the destination information 12 and the notification information 21 are printed on the cover piece 10 or the backing paper piece 20 or when paste printing is performed. Is avoided.

  After the cover piece 10 and the backing paper piece 20 are attached by the pressure-sensitive adhesive layer 3 in this way, the concealing postcard 1 is sent to the destination according to the destination information 12. In the concealing postcard 1, the cover piece 10 and the backing paper piece 20 are securely attached by the pressure-sensitive adhesive layer 3, so that the cover piece 10 and the backing paper piece 20 are peeled off by a mail sorting machine or the like in the middle of sending. The concealment information 11a is not seen from the outside.

  And since the adhesive which comprises the pressure sensitive adhesive layer 3 can peel after sticking as mentioned above, the cover piece 10 and the back piece 20 are peeled in the destination of the concealment postcard 1. Thus, the concealment information 11a entered in the concealment information entry column 11 is confirmed.

(Second Embodiment)
4A and 4B are diagrams showing a second embodiment of the pressure-bonding sheet of the present invention, in which FIG. The figure which shows the structure of the surface on the opposite side to a surface, (c) is AA 'sectional drawing shown to (a).

  As shown in FIG. 4, the pressure-bonding sheet in this embodiment is different from that shown in the first embodiment in that the microcapsule layer 5 is not provided in the backing paper piece 120, The concealment postcard 101 is different in that a self-coloring ink layer 104 is provided as a color display layer instead of the color developing layer 4.

  The self-coloring ink layer 104 is self-coloring when a predetermined pressure is applied. For example, the self-coloring ink layer 104 is configured by laminating the color developing layer 4 on the microcapsule layer 5 shown in the first embodiment. The thing etc. which are done can be considered. In addition, the self-coloring ink layer 104 in this embodiment is also laminated on the pressure-sensitive adhesive layer 103 so as to serve as so-called paste-killing printing, whereby the edge of the cover piece 110 on the side opposite to the folded portion 130 is used. The adhesive strength of is weak compared to other areas. The degree of decrease in adhesive strength due to the self-coloring ink layer 104 is appropriately set according to the application, but the thickness of the self-coloring ink layer 104 can be adjusted, or the self-coloring ink layer 104 can be placed on the pressure-sensitive adhesive layer 103. It can be set by laminating in a dot pattern. In this way, the self-coloring ink layer 104 also serves as a paste print, and even when the self-coloring ink layer 104 is not colorless and transparent, the self-coloring ink layer 104 adheres the cover sheet 110 to the back paper piece 120. It is avoided that the designability in is impaired. In addition, the structure which pastes and prints on the pressure sensitive adhesive layer 103 in the edge side on the opposite side to the folding part 130 of the cover piece 110, and laminates | stacks the self-coloring ink layer 104 on it may be sufficient.

  Also, the backing paper piece 120 is also subjected to paste printing on the side opposite to the folding portion 130 on the surface on which the pressure-sensitive adhesive layer 103 is laminated. What is the folding portion 130 of the cover piece 110? The adhesive strength at the opposite end is weaker than in other areas.

  Below, the usage method of the concealment postcard 101 comprised as mentioned above is demonstrated.

  FIG. 5 is a diagram for explaining how to use the concealment postcard 101 shown in FIG.

  When the concealment postcard 101 shown in FIG. 4 is used, first, as shown in FIG. 5A, in the concealment information entry column 111 provided on the surface of the cover piece 110 on which the pressure-sensitive adhesive layer 103 is laminated. The concealment information 111a to be notified to the destination of the concealment postcard 101 is entered. At this time, in the concealment information entry column 111, although the pressure-sensitive adhesive layer 103 is laminated on the postcard substrate 102, the adhesive constituting the pressure-sensitive adhesive layer 103 is writable, so The concealment information 111a can be entered in the information entry field 111. Further, since the adhesive constituting the pressure-sensitive adhesive layer 103 has a self-adhesive property that only the self can be attached as described above, the cover piece 110 and the back piece 120 are connected via the folding portion 130. In the unfolded state, even if the surface is sticky or comes into contact with other articles, it does not stick to it.

  After that, as shown in FIG. 5B, the postcard substrate 102 is folded at the folding portion 130 so that the surface on which the pressure-sensitive adhesive layer 103 is laminated is inside. Then, the concealment information 111a entered in the concealment information entry column 111 is concealed, and as shown in FIG. 5 (c), the feeling that the cover piece 110 and the back piece 120 are stacked on the postcard substrate 102, respectively. The pressure bonding layer 103 comes to face. Here, since the adhesive constituting the pressure-sensitive adhesive layer 103 has a self-adhesive property that only the self can be attached as described above, the pressure-sensitive adhesive layer 103 of the cover piece 110 and the backing paper piece 120 is formed. By facing each other, the front cover piece 110 and the back paper piece 120 are adhered by the pressure-sensitive adhesive layer 103. Note that the cover sheet 110 and the back paper piece 120 are respectively subjected to paste printing by the self-coloring ink layer 104 or the like on the end opposite to the folded portion 130 of the cover paper piece 110 and the back paper piece 120, so Although the adhesive strength is weaker than that of other regions, it is not without the adhesive force, so the cover piece 110 and the back paper piece 120 are adhered by the pressure-sensitive adhesive layer 103 also in this region. .

  Here, in order to securely adhere the cover sheet piece 110 and the back paper piece 120 with the pressure-sensitive adhesive layer 103, it is necessary to apply a predetermined pressure in a direction in which the folded cover sheet piece 110 and the back paper piece 120 are sandwiched. . That is, after the postcard base material 102 is folded at the folding part 130 as described above, if the cover sheet 110 and the back paper sheet 120 are securely attached to each other, the concealment postcard is not applied. During the delivery of 101, the cover piece 110 and the back piece 120 may be peeled off by a mail sorting machine or the like, and the concealment information 111a may be seen from the outside.

  FIG. 6 is a diagram for explaining the operation of the concealment postcard 101 shown in FIG.

  In the concealed postcard 101 shown in FIG. 4, after the postcard substrate 102 is folded at the folding portion 130, sufficient pressure is not applied to ensure that the cover piece 110 and the back piece 120 are adhered. In this case, the self-coloring ink layer 104 does not develop color, and as a result, as shown in FIG. 6A, the region of the cover sheet 110 where the self-coloring ink layer 104 is laminated does not change color.

  On the other hand, after the postcard base material 102 is folded at the folding part 130, when sufficient pressure is applied to ensure that the cover sheet piece 110 and the backing paper piece 120 are adhered, FIG. As shown, the self-coloring ink layer 104 will develop color.

  As described above, the concealing postcard 101 in this embodiment is such that the postcard substrate 102 is folded at the folding portion 130 so that the surface on which the pressure-sensitive adhesive layer 103 is laminated is inside, and then the cover piece 110 and the backing paper piece. When a sufficient pressure is not applied to ensure that the cover 120 is firmly attached, the area of the cover sheet 110 where the self-coloring ink layer 104 is laminated does not change color, while the cover sheet 110 and the back sheet piece 120 do not change color. When a sufficient pressure is applied to ensure that the self-coloring ink layer 104 is colored, the cover piece 110 and the back piece 120 are attached as described above. After that, the region where the self-coloring ink layer 104 is laminated is partially peeled off to check the coloring state of the self-coloring ink layer 104, and according to this coloring state, the cover piece 110 and the backing paper piece 120 are surely To be attached It can recognize whether sufficient pressure is applied. At this time, in the region where the self-coloring ink layer 104 is laminated, the adhesive printing is performed compared to the other regions of the front cover piece 110 and the back paper piece 120 because the paste is printed by the self-coloring ink layer 104 and the like. Therefore, the region where the self-coloring ink layer 104 is laminated is partially peeled easily. In order to confirm the color development state of the self-color development ink layer 104, it is necessary to make the color of the paste printing by the self-color development ink layer 104 or the like different from the color in the color development state of the self-color development ink layer 104.

  Further, in such a configuration, the self-coloring ink layer 104 is disposed on the pressure-sensitive adhesive layer 103 laminated on the postcard substrate 102, that is, when the postcard substrate 102 is folded at the folding portion 130, Therefore, the self-coloring ink layer 104 does not appear on the outer surface when the postcard substrate 102 is folded at the folding part 130, so that the self-coloring ink layer 104 is In such a case, the coloring does not cause inadvertent dirt around the concealing postcard 101 such as a mail sorting machine or other postal items.

  After the cover sheet piece 110 and the back sheet piece 120 are attached by the pressure-sensitive adhesive layer 103 in this way, the concealing postcard 101 is sent to the destination according to the destination information 112. In the concealing postcard 101, the cover piece 110 and the backing paper piece 120 are securely attached by the pressure-sensitive adhesive layer 103, so that the cover piece 110 and the backing paper piece 120 are peeled off by a mail sorting machine or the like in the middle of sending. The concealment information 111a is not seen from the outside.

  And since the adhesive which comprises the pressure sensitive adhesive layer 103 can peel after sticking as mentioned above, the cover piece 110 and the back piece 120 are peeled in the destination of the concealment postcard 101. Thus, the concealment information 111a entered in the concealment information entry column 111 is confirmed.

DESCRIPTION OF SYMBOLS 1,101 Concealment postcard 2,102 Postcard base material 3,103 Pressure sensitive adhesive layer 4 Developer layer 5 Microcapsule layer 10,110 Cover piece 11,111 Concealment information entry column 11a, 111a Concealment information 12,112 Destination information 20 , 120 Backing paper piece 21, 121 Notification information 30, 130 Folding part 104 Self-coloring ink layer

Claims (2)

The first sheet part and the second sheet part are connected to each other via a folding part so as to be foldable, and a predetermined pressure is applied to the inner surface in the folded state, whereby the first sheet part and the second sheet part are connected. In the pressure-bonded sheet formed by laminating the adhesive layer for adhering the two sheet portions,
Color develops by applying the predetermined pressure to the end of the first sheet portion and the second sheet portion on the opposite side of the folded portion on the surface where the adhesive layer is laminated. A pressure-sensitive adhesive sheet comprising a color display layer. The crimping sheet according to claim 1,
The color display layer is
A coloring layer containing a coloring agent that is provided on an end of the first sheet portion opposite to the folded portion and is crushed by applying the predetermined pressure;
A pressure-bonding sheet comprising a developer layer that is provided on an end of the second sheet portion opposite to the folded portion and contains a developer that develops color by reacting with the crushed color former.

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