JP2008284859A - Peelable press-bonding sheet with reinforcing adhesive installed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that regarding a conventional press-bonding sheet with the beforehand application of an adhesive which is not normally bonded, and is bonded when a specified pressure is applied, and can easily be peeled even after being bonded, if the press pressing force is weak, there is fear for the peeling on the bonded surface, or if the pressing force is too strong, there is fear for the generation of a paper breakage, and the pressing force has to be adjusted at the time of the press press-bonding work, and also, that regarding the peel prevention, the peel prevention is realized by adding a stronger adhesive section on the peripheral section, however, the peel prevention is not sufficient by a machine of which the press press-bonding force is weak. <P>SOLUTION: In order to prevent the press-bonding sheet from being peeled even when the press pressing force is weak, the reinforcing adhesive is additionally applied on the top of a weak adhesive which has been applied in advance, and also, in a part of a section being close to the sheet periphery. Thus, the bonding force which is stronger than the bonding force of a normal weak bonded surface can be obtained while being able to be peeled even after the bonding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a member for concealing confidential information by sheet folding such as tri-folding or bi-folding, and in particular, printed or printed and displayed on forms such as various application forms, postcards, and cards. For example, the present invention relates to a member for concealing secret information that is not desired to be known to others, such as a personal identification number and deposit balance.

Conventionally, this is a member for concealing confidential information by folding and overlapping the sheets. For sheet members that can be peeled by providing a peelable adhesive to the concealed part, adhesion by pressing, heating, etc. Various measures have been taken to prevent unintentional peeling later. Things that have been made difficult to peel off by strengthening the adhesive force, or around the peelable adhesive surface on which confidential information is printed or printed by providing a strong adhesive and a perforation inside the peelable adhesive surface only Some have been devised to cut off and peel off.
Japanese Patent Laid-Open No. 5-169881

The peelable sheet has two problems: it can be easily peeled off and the peelable part is not peeled off unintentionally. For example, in the case of a pressure-sensitive adhesive sheet that has an adhesive that increases the adhesive force when a certain pressure is applied, the pressure applied by the bonding apparatus has been lowered to prevent peeling and to prevent tearing. In order to increase the adhesive force in order to prevent peeling, it is necessary to increase the pressure of the apparatus, and it is necessary to adjust the crimping force of the apparatus that always performs crimping to an appropriate range. The adhesive force varies greatly depending on the environmental temperature / humidity, moisture retention, paper thickness, or printing density on the adhesive surface rather than the characteristics of the adhesive, so this pressure adjustment is also very complicated and complicated, making the device complicated. Not only is it expensive, but there is also a problem that adjustment is difficult unless it is a dedicated operator.

On the other hand, by providing a strong adhesive only around the peelable adhesive surface and a perforation inside it, a sheet with a measure to peel off after peeling off the peelable adhesive surface on which confidential information is printed or printed However, for example, if a strong adhesive and perforation are added to the three sides around the postcard, there is a drawback that peeling at the time of opening becomes very difficult. In addition, in order to make it easy to peel off when opening, a strong adhesive and perforation are provided only on one side of the left side (long side). If the adhesive strength is weak, it peels off from the top and bottom (short side). There is a concern that concealment information will be visible.

The present invention is to overcome the problem that an optimum pressure-bonding sheet cannot be provided without adjusting the pressure-bonding force of the apparatus in this manner, and pressure-bonding that does not cause unintentional peeling even if the adhesive force is weak. The purpose is to provide seats.

With respect to a pressure-bonded sheet configured to be folded into a Z-shape, V-shape, C-shape, or the like, a peelable adhesive is applied to the front surface of at least one of the facing sheet pieces to be bonded, and the sheet is spread. A strong adhesive that cannot be peeled after bonding to prevent peeling along the leading edge (opposite side of the crease) of the facing sheet pieces is applied in a band shape, and further, a sewing machine is formed along the strong adhesive inside. There is a pressure-bonding sheet provided with eyes, but when opening, the perforated part can be folded and peeled off. The present invention is a sheet surface on which a weak adhesive facing each other such a pressure-bonding sheet is applied on the front surface, and the side where the strong adhesive is not provided among the three sides other than the side of the folded portion (for example, two upper and lower sides). In order to prevent the side) from peeling off or floating, a reinforcing adhesive is applied to the vicinity of the side ridge so that it can be easily peeled off after opening even after bonding. The reinforcing adhesive is weaker than the strong adhesive and stronger than the weak adhesive so that the adhesive strength of the portion is stronger than the weak adhesive applied to the entire surface, or the strong adhesive However, the adhesive is weakened so that it is used as a reinforcing adhesive. The adhesive strength can also be adjusted by changing the application shape of the reinforcing adhesive to a band shape, a triangular shape, or a dot shape, and adjusting the size. Further, by cutting the sheet on the downstream side of the opening direction of the reinforcing adhesive, even if the application portion of the reinforcing adhesive is torn when the sheet is peeled off, the breaking can be prevented from spreading.

According to the present invention, even if there is a state where the adhesive strength of the pressure-bonding sheet is weak, unintentional peeling can be prevented in advance and this can be easily peeled off when opened, Various cases, such as unintentional storage after crimping and poor adhesion, resulting in decreased adhesive strength due to variations in sheet characteristics or printing density of confidential information on the adhesive surface. Even in such a situation, it is possible to use a pressure-sensitive adhesive sheet that can be used with peace of mind even if there is a slight decrease in pressure-bonding force, and that does not require adjustment of the pressure-bonding force during pressure bonding. In addition, since the crimping force applied to the crimping sheet is less than that of the conventional apparatus, the machine can be reduced in size and cost. Further, since there is no fear of peeling even if the adhesive force is somewhat weak and frequent pressure adjustment is unnecessary, it is possible to provide a small device that can be easily used in general offices that have been difficult to install.

BEST MODE FOR CARRYING OUT THE INVENTION

EXAMPLES Hereinafter, although this invention is demonstrated based on the Example shown in figure, this invention is not limited to those Examples.
FIG. 1 shows the front and back surfaces in a final state after the pressure-bonding sheet is pressure-bonded, and FIG. 2 similarly shows the state of the sheet before pressure-bonding on the front and back surfaces. The sheet to be crimped is folded along the folding perforation 3 in the form shown in FIG. 3, and the facing sheet pieces are bonded by a separately imparted crimping force. The base material 7 in FIG. 3 is so-called paper, and is in a state in which the weak adhesive 6 is applied to the entire surface of the base material 7 as shown in FIG. The weak adhesive 6 is not normally bonded but can be bonded when given pressure or the like, and can be peeled after bonding. In the case of opening a sheet pressure-bonded in a form as shown in FIG. 1, the base material 7 is first folded back along the perforation 2 so that the base material 7 is split along the perforation 2, and thus peels off from there. . In the present invention, the reinforcing adhesives 5a, 5b, 5c and 5d shown in FIG. 2 (rear surface) are further partially applied on the surface of the weak adhesive 6. This reinforcing adhesive is efficient when applied in the same material and in the same process as the strong adhesive. In that case, do not place the reinforcing adhesive on the opposite parts of the facing sheet pieces. Reinforcing adhesive parts that are weaker and stronger than weak adhesives can be easily created. Naturally, the relationship of “strong adhesive> reinforcing adhesive> weak adhesive” can also be created by adjusting the adhesive strength depending on the concentration of the reinforcing adhesive, the application amount, the application area, and the application shape of the reinforcing adhesive. .
Further, it is possible to make a cut wider than the reinforcing adhesive in the vicinity of the reinforcing adhesive as shown in FIGS. 5 and 6 and on the downstream side in the opening direction. This cut may be in a half cut state. Even if the base material 7 is torn from the bonded portion of the reinforcing adhesive at the time of opening the sheet, the cut is prevented by the cut.

In the pressure-bonding sheet showing an embodiment of the present invention, the state after pressure bonding is illustrated. In the pressure-bonding sheet showing an embodiment of the present invention, the state before pressure-bonding is illustrated. It is AA sectional drawing of a crimping | compression-bonding sheet. It is another embodiment of the present invention. This is an example in which a cut is made in the vicinity of the reinforcing adhesive. AA sectional view of an embodiment in which a cut is made in the vicinity of the reinforcing adhesive

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Address printing part 2 Cutting perforation 3 Folding perforation 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h Strong adhesive 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h Reinforcing adhesive 6 Weak adhesive 7 Base material (paper)
8a, 8b, 8c, 8d, 8e, 8f, 8g, 8h

Claims (3)

A sheet in which two or more sheet pieces are connected via a folding part is configured to be folded into a Z-shape, V-shape, C-shape, or the like at the folding part, and the sheet pieces facing each other when folded. At least one or both of the sections are not normally bonded, but can be bonded when given conditions are provided, and a weak adhesive that can be peeled even after bonding is provided on the entire surface, and substantially the peripheral portion of the sheet piece In a sheet piece in which a strong adhesive that does not normally adhere to at least one side of the sheet and is provided with substantially the same conditions as the adhesive and can be bonded and cannot be peeled after bonding is provided in a strip shape, the strong adhesive It is possible to bond to at least one of the remaining sides not provided with adhesive under normal conditions without being normally bonded, and a reinforcing adhesive that is weaker than the strong adhesive and can be peeled off even after bonding. Above For example the strip on the adhesive surface, the sheet being characterized in that provided in a triangular shape, or a dot shape. The sheet according to claim 1, wherein the reinforcing adhesive is the same adhesive as the strong adhesive and is provided only in one of the facing regions of the facing sheet sides, so that even if it is the same adhesive, A sheet characterized in that it can be peeled off even after bonding. In the sheet according to claim 1 or 2, by providing a notch in the vicinity of the region to be bonded by the reinforcing adhesive and on the downstream side in the peeling direction of the sheet piece, even if the paper breaks at the time of peeling, the tearing spreads widely. A sheet characterized by not having it.

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